Abstract

The present invention provides a water resource linkage system comprising: a main water source (100); a central storage tank (200) for receiving water from the main water source (100); a plurality of auxiliary water sources (300) formed around the central storage tank (200) to receive water from the central storage tank (200) or to supply water to the central storage tank (200); and a waterway (400) including a main waterway (410) connecting the main water source (100) and the central storage tank (200) and auxiliary waterways (420) connecting the auxiliary water sources (300) and the central storage tank (200). Therefore, the present invention can be realistically and effectively applied at a low cost in a country with water shortage.

IPC Classes  ?

• E03B 1/00 - Methods or layout of installations for water supply
• E03B 3/00 - Methods or installations for obtaining or collecting drinking water or tap water

Abstract

34343434343434344) having phosphorous adsorbed to the surface thereof to be rapidly washed using washing water (W) and rapidly separated from the washing water (W) so as to be reused.

IPC Classes  ?

• B01J 20/34 - Regenerating or reactivating
• B01J 20/02 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption

Abstract

3434343434344) is carried to the magnetite storage part (300) by the carrier device (200) and is quickly reused.

IPC Classes  ?

• B01J 20/34 - Regenerating or reactivating
• B01J 20/02 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption

Abstract

The present invention provides: a composition capable of manufacturing a high performance PHC pile by substituting, for cement, a siliceous slag binder, obtained by pulverizing water cooled type ferro-nickel slag from among industrial byproducts of ferro-nickel, which is a product of a steel raw material, to have a fineness that is more than that of cement particles, and then mixing the same; and a method for manufacturing a PHC pile by using the same.

IPC Classes  ?

• C04B 18/14 - Waste materials; Refuse from metallurgical processes
• C04B 20/00 - Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
• C04B 28/02 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
• C04B 24/04 - Carboxylic acids; Salts, anhydrides or esters thereof
• C04B 40/02 - Selection of the hardening environment
• B28B 23/02 - Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material wherein the elements are reinforcing members
• E02D 5/58 - Prestressed concrete piles
• C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone

Abstract

The present invention relates to a concrete composition for a prefabricated precast concrete (PC) box, having improved chemical resistance by using a silica-based slag fine powder, and a prefabricated PC box using the same and, more specifically, to: a concrete composition for a prefabricated PC box, having improved chemical resistance by using a silica-based slag fine powder, the composition increasing the replacement rate, with respect to cement, of a silica-based slag fine powder obtained by finely grinding, into at least a cement particle level, granulated ferronickel slag that is the industrial by-product of ferronickel to be used as a main material in stainless steel manufacturing among steel materials; and a prefabricated PC box using the same. One preferable embodiment of the concrete composition for a prefabricated PC box, having improved chemical resistance by using a silica-based slag fine powder, of the present invention, comprises, on the basis of unit volume of the concrete composition: 160-180 kg/m3of water; 420-460 kg/m3of cement; 750-850 kg/m3of fine aggregate; and 920-940 kg/m3 of coarse aggregate, wherein 25-35 wt% of a silica-based slag fine powder is replaced and added on the basis of 100 wt% of the cement, and 0.88-0.92 wt% of an admixture and 0.0008-0.001 wt% of an air entraining agent are mixed.

IPC Classes  ?

• C04B 18/14 - Waste materials; Refuse from metallurgical processes
• C04B 20/00 - Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
• C04B 28/02 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
• C04B 40/02 - Selection of the hardening environment
• E04B 1/04 - Structures consisting primarily of load-supporting, block-shaped or slab-shaped elements the elements consisting of concrete, e.g. reinforced concrete, or other stone-like material
• E02D 29/00 - Underground or underwater structures; Retaining walls
• E02D 29/045 - Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
• C04B 111/20 - Resistance against chemical, physical or biological attack

Abstract

The present invention relates to an asphalt composition in which aggregates including steel slag having a maximum particle diameter of 10 mm are mixed, and provides: an asphalt composition of which the combined gradation is respectively 98-99.7%, 75-80%, 45-57%, 27-40%, 17-27%, 10-16%, 7-9%, and 4-6% when sieve sizes are 10 mm, 5 mm, 2.5 mm, 1.2 mm, 0.6 mm, 0.3 mm, 0.15 mm, and 0.08 mm; and an asphalt paving method using the same, thereby having excellent durability, water resistance, and strength, and superior adhesive strength, shortening traffic control time, having good constructability, and being economical.

IPC Classes  ?

• C04B 18/14 - Waste materials; Refuse from metallurgical processes
• C04B 18/02 - Agglomerated materials
• C04B 26/26 - Bituminous materials, e.g. tar, pitch
• C04B 18/16 - Waste materials; Refuse from building or ceramic industry
• C04B 24/24 - Macromolecular compounds
• C04B 24/12 - Nitrogen containing compounds
• E01C 7/18 - Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
• E01C 7/32 - Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
• C04B 103/61 - Corrosion inhibitors
• C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone

Abstract

The present invention suggests a water resource linkage system using auxiliary water sources, comprising: a plurality of wells (100); a central purification tank (200) configured to supply purified water to the plurality of wells (100); a plurality of auxiliary water sources (300) configured to supply water to the wells (100) or the central purification tank (200) in order to replenish a water shortage of the wells (100); and water channels including: a replenishing water channel (410) for supplying replenishing water to the wells (100) from the auxiliary water sources (300); a contaminated water channel (420) for supplying contaminated water to the central purification tank (200) from the auxiliary water sources (300); and a purified water channel (430) for supplying purified water to the wells (100) from the central purification tank (200). Thereby, it is possible to apply the present invention effectively and practically at low cost to countries with water shortages.

IPC Classes  ?

• E03B 1/02 - Methods or layout of installations for water supply for public or like main supply
• E03B 1/04 - Methods or layout of installations for water supply for domestic or like local supply
• E03B 3/08 - Obtaining and confining water by means of wells
• E03B 3/04 - Methods or installations for obtaining or collecting drinking water or tap water from surface water
• E03B 3/02 - Methods or installations for obtaining or collecting drinking water or tap water from rain-water
• E03B 7/02 - Public or like main pipe systems
• E03B 7/04 - Domestic or like local pipe systems
• G06Q 50/06 - Electricity, gas or water supply

Abstract

The present invention relates to a concrete composition in which the substitution rate of a silica-based slag for concrete is increased using a liquid activating agent and, more specifically, to a concrete composition in which the substitution rate of a silica-based slag for concrete is increased using a liquid activating agent, wherein the liquid activating agent is used to increase the substitution rate of silica-based slag for concrete with respect to cement, the silica-based slag being obtained by finely pulverizing, to at least a cement particle standard, granulated ferronickel slag (prime sand), one of the industrial byproducts of ferronickel, which is a steel raw material product. According to a preferable embodiment of the present invention, the concrete composition comprises: 165-169 kg/m3 of water; 231-374 kg/m3 of cement; 803-883 kg/m3 of fine aggregate; 923-931 kg/m3 of coarse aggregate; and 12-22 kg/m3 of a liquid activating agent per unit volume of the concrete composition, wherein 25-35 wt% of the silica-based slag for concrete is added by substitution with respect to 100 wt% of the cement.

IPC Classes  ?

• C04B 7/153 - Mixtures thereof with other inorganic cementitious materials or other activators
• C04B 18/14 - Waste materials; Refuse from metallurgical processes
• C04B 24/26 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• C04B 24/12 - Nitrogen containing compounds
• C04B 22/08 - Acids or salts thereof

Abstract

The present invention relates to a water treatment apparatus that has been made to solve the problem described above, the water treatment apparatus, according to the present invention, comprising: an upward filtration tank (110) which, in order to remove phosphorus contained in polluted water, is provided with a filtration unit (111) filled with magnetite (Fe3O4) powder which is a by-product of a steel-rolling process; a first flow path (P1) which transfers polluted water to the filtration tank (110); a branching pipe path (150) which downwardly introduces, into the filtration tank (110), washing water for washing phosphorus adsorbed on the surface of the magnetite (Fe3O4) having magnetic force, and which is coupled to the filtration tank (110) in order to discharge the polluted water that has passed through the filtration unit (111), wherein the branching pipe path (150) comprises a coupling part (151) coupling with the filtration tank (110), an outlet part (154) coupled to the coupling part (151) by means of a bent section (152), and an inlet part (155) coupled to a branching section (153) of the outlet part (154); a first adsorption device (160) which is provided to the coupling part (151) in order to recover, using magnetic force, magnetite (Fe3O4) powder that is contained in the polluted water as a result of breaking away from the filtration unit (111); a first adsorption unit (A) which is formed on an inner surface of the coupling part (151) by means of the magnetic force of the first adsorption device (160); a second flow path (P2) which is coupled to the outlet part (154) in order to discharge the polluted water; a third flow path (P3) which is coupled to the inlet part (155) so as to enable washing water to be introduced; a washing water tank (120) which is connected to the third flow path (P3); a fourth flow path (P4) which is connected to the filtration tank (110) so as to discharge the washing water; and a phosphorus discharge tank (130) which is connected to the fourth flow path (P4). In this case, the water treatment apparatus, according to the present invention, uses, among iron oxides (Fe2O3, Fe3O4, FeO) which are by-products generated in steelmaking, magnetite (Fe3O4) exhibiting excellent phosphorus or heavy metal adsorption as an adsorbent, and thus the by-products may be recycled. Particularly, magnetite exhibits a strong magnetic force, and has excellent phosphorus adsorption capacity by having a monodentate and a bidentate formed with a phosphate ion on the particle surface thereof (see figure 1), and thus may effectively remove phosphorus from polluted water.

IPC Classes  ?

• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• C02F 1/58 - Treatment of water, waste water, or sewage by removing specified dissolved compounds
• B03C 1/30 - Combinations with other devices, not otherwise provided for
• B01D 24/16 - Upward filtration
• B01D 24/46 - Regenerating the filtering material in the filter
• B01D 24/48 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
• C02F 101/10 - Inorganic compounds

Abstract

The present invention relates to a water treatment apparatus that has been made to solve the problem described above, the water treatment apparatus, according to the present invention, comprising: an adsorption reaction tank (110) which has an inlet part (111) provided thereto through which polluted water is introduced; a spray device (200) which sprays magnetite (Fe3O4) powder into the adsorption reaction tank (110) in order to adsorb phosphorus contained in the polluted water; a recovery tank (120) which has an outlet part (121) provided thereto, and which is connected to an end part of the adsorption reaction tank (110) so as to enable the polluted water containing magnetite (Fe3O4) to flow therein by passing through the adsorption reaction tank (110); and a washing tank (140) which removes the phosphorus from the magnetite (Fe3O4) recovered in the recovery tank (120) by using washing water. In this case, the water treatment apparatus, according to the present invention, uses, among iron oxides (Fe2O3, Fe3O4, FeO) which are by-products generated in steelmaking, magnetite (Fe3O4) exhibiting excellent phosphorus or heavy metal adsorption as an adsorbent, and thus the by-products may be recycled. Particularly, magnetite exhibits a strong magnetic force, and has excellent phosphorus adsorption capacity by having a monodentate and a bidentate formed with a phosphate ion on the particle surface thereof (see figure 1), and thus may effectively remove phosphorus from polluted water. The present invention is a water treatment apparatus whereby polluted water mixed with magnetite (Fe3O4) powder in the adsorption reaction tank (110) is introduced into the recovery tank (120) in which magnetite (Fe3O4) having phosphorus from the polluted water attached to the surface thereof is recovered, and the phosphorus-removed polluted water is discharged, and thus the present invention enables a shorter water treatment time and a higher phosphorus removal efficiency compared to conventionally-used phosphorus removal-type water treatment apparatuses.

IPC Classes  ?

• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• C02F 1/58 - Treatment of water, waste water, or sewage by removing specified dissolved compounds
• B03C 1/14 - Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
• B01J 20/02 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
• C05F 17/00 - Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
• C02F 101/10 - Inorganic compounds

Abstract

The present invention relates to a moisture-reducing and drying apparatus for waste and, specifically, to a moisture-reducing and drying apparatus for waste, which reduces moisture in solid refuse fuels or waste in a mechanical biological treatment system. The apparatus comprises: a feeding unit for transferring and feeding waste; a drying unit for drying the waste fed by the feeding unit; an air supply unit, connected to the drying unit, for supplying heat; and a discharge unit for discharging the waste dried by the drying unit. Accordingly, the present invention supplies hot air at low temperature to waste and dries the same, to economically remove moisture contained in solid refuse fuels or waste, compared with the existing hot air drying manner, and improve the production efficiency of a solid refuse fuel product. Ultimately, the present invention can reduce operation costs of a mechanical biological treatment system, so as to improve the economical efficiency.

IPC Classes  ?

• F26B 21/00 - Arrangements for supplying or controlling air or gases for drying solid materials or objects
• F26B 21/10 - Temperature; Pressure
• F26B 25/06 - Chambers, containers, or receptacles
• F26B 25/04 - Agitating, stirring, or scraping devices
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless

Abstract

The present invention relates to a method for precision separating and treating low-grade mixed waste and, more specifically, to a method for precision separating and treating low-grade mixed waste so as to greatly increase fuelization efficiency by retreating, before final discardment, mixed waste having a high water content and mixability by comprising inorganic materials, high-water-content materials, mixed resins, rubber, fibers, vegetables and the like, which are remnants to be generated during a process of manufacturing a solid refuse fuel (SRF) from various municipal wastes and industrial wastes, and remnants to be generated during a process of manufacturing a Bio-SRF.

IPC Classes  ?

• B02C 23/08 - Separating or sorting of material, associated with crushing or disintegrating
• B03C 1/02 - Magnetic separation acting directly on the substance being separated
• B07B 1/22 - Revolving drums

Abstract

A water treatment apparatus according to the present invention comprises: a mixture flow passage (P0) through which mixed-water (C) obtained by mixing surface water (A) and seawater (B) is delivered; a first water purification unit (L1) for treating the mixed-water (C) which is delivered through a first flow passage (P1), using a receiving well (10), a mixing/coagulation tank (20), a settling tank (30), and a filtering tank (40); a second water purification unit (L2) for treating the mixed-water (C) which is delivered through a second flow passage (P2), using a filter tank (100) and a reverse osmosis membrane tank (200); and a disinfecting tank (50) for treating the mixed-water (C) having been treated in the first water purification unit (L1) and the second water purification unit (L2). When the water treatment apparatus of the present invention is used, the water treatment apparatus can be operated using an existing general water purification facility, and thus it is possible to minimize an initial construction cost. In addition, since a water treatment process can be controlled according to the turbidity of mixed-water or brackish water which includes surface water and seawater mixed with each other, and the concentration of a total dissolved solid (TDS), reasonable and economical water treatment is possible. Especially, since the water treatment method uses mixed-water or brackish water with which seawater is mixed, the water treatment method is effective for coastal areas lacking fresh water.

IPC Classes  ?

• C02F 1/00 - Treatment of water, waste water, or sewage
• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
• B01D 61/14 - Ultrafiltration; Microfiltration
• B01D 61/02 - Reverse osmosis; Hyperfiltration

Abstract

A tapping device using vacuum according to an embodiment of the present invention may comprise a sealing-type chamber, which seals a molten steel outlet formed on the lower portion of a side surface of a furnace body, and which is configured to be able to adjust the internal pressure thereof; and a first tapping spout formed to penetrate the lower portion of the sealing-type chamber such that molten steel, which has been introduced through the molten steel outlet, is discharged to the outside, the first tapping spout having an upper portion formed to protrude from the lower portion of the furnace body to a predetermined height.

IPC Classes  ?

• C21C 5/46 - Constructional features of converters - Details or accessories
• C21C 5/28 - Manufacture of steel in the converter
• C21C 7/10 - Handling in vacuum

Abstract

Provided are a system and a method for controlling a ventilation fan and a gas circuit breaker so as to control driving levels of the ventilation fan and the gas circuit breaker on the basis of signals detected by a gas flow detecting unit and a ventilation sensor. The provided system for controlling the ventilation fan and the gas circuit breaker comprises: the gas flow detecting unit for detecting a gas flow rate of the gas supplied through a gas supply pipe to a gas range; the ventilation sensor for detecting the gas concentration in a space in which the gas range is provided; and a control device for determining the driving level of the ventilation fan on the basis of reference values of the gas flow rate detected by the gas flow detecting unit and the gas concentration detected by the ventilation sensor, and for driving the ventilation fan on the basis of the driving level.

IPC Classes  ?

• F24F 11/00 - Control or safety arrangements
• F24F 7/06 - Ventilation with ducting systems with forced air circulation, e.g. by fan

Abstract

The present invention relates to a shock-absorbing device of a continuous casting oscillator, provided between a fixed part of the lower part and a moving part of the upper part of the continuous casting oscillator for vibrating a continuous casting mold, the device comprising: a first shock-absorbing part coupled to the upper part of the fixed part so as to absorb shock by means of vertical expansion and contraction; and a second shock-absorbing part coupled between the upper part of the first shock-absorbing part and the lower part of the moving part so as to absorb shock by means of horizontal movement. Therefore, the present invention couples and provides any two of the first shock-absorbing part, the second shock-absorbing part, and a supporting part between the fixed part and the moving part, thereby doubly absorbing vibration of the moving part in the continuous casting oscillator, which vibrates the continuous casting mold, so as to improve shock-absorbing performance.

IPC Classes  ?

• B22D 11/053 - Means for oscillating the moulds
• B22D 11/16 - Controlling or regulating processes or operations

Abstract

The present invention relates to a reverse osmosis membrane filter for preventing the formation of a biofilm, which treats the supply water of a water treatment apparatus, a method for manufacturing the same and a water treatment apparatus using the same, and the membrane filter comprises: a first spacer having a microbial substance impregnated therein; a reverse osmotic membrane for treating supply water flowing into the first spacer; and a second spacer discharging permeate water treated in the reverse osmotic membrane and into which a microbial substance is impregnated. Therefore, the present invention impregnates microbial substances in the first spacer and the second spacer of the reverse osmosis membrane filter treating supply water of the water treatment apparatus so as to prevent the formation of a biofilm in advance, thereby providing an effect of preventing the deterioration of flux and processing efficiency according to membrane contamination in a membrane filtration process and simultaneously reducing operating expenses through the extension of a membrane replacement cycle.

IPC Classes  ?

• B01D 61/02 - Reverse osmosis; Hyperfiltration
• B01D 65/08 - Prevention of membrane fouling or of concentration polarisation

Abstract

The present invention relates to a cartridge filter for inhibiting biofilm contamination, a method for manufacturing the same, and a membrane filtering water treatment apparatus using the same, the cartridge filter for inhibiting biofilm contamination, which pre-treats treated water of a membrane filtering water treatment apparatus, comprising: a support part in which treated water flows in from the outer surface and flows out to the inner surface; a first filter part in which a first antimicrobial substance is supported on the outer surface of the support part; and a second filter part in which a second antimicrobial substance is supported on the inner surface of the support part. Therefore, the present invention provides effects of: preventing deterioration of process efficiency and flux caused from membrane contamination during a subsequent membrane filtration process by supporting a plurality of kinds of antibacterial substances on a cartridge filter for inhibiting biofilm contamination which pre-treats treated water of a membrane filtering water treatment apparatus and thus pre-controls biofilm contamination; and reducing operation costs through extension of the membrane replacement cycle.

IPC Classes  ?

• B01D 27/14 - Cartridge filters of the throw-away type having more than one filtering element

Abstract

Provided are an automatic fire extinguishing system having an electricity blocking function capable of blocking electricity or gas supplied to a stove when a temperature of the stove is maintained in the state of at least a set temperature during at least a set time, and a fire prevention method using the same. The provided automatic fire extinguishing system detects the temperature of a stove when detecting sparks from the stove, measures a set temperature maintaining time when the detected stove temperature is at least the set temperature, and blocks the driving of the stove by generating a stove driving blocking signal when the measured set temperature maintaining time exceeds the set time.

IPC Classes  ?

• F24C 7/08 - Arrangement or mounting of control or safety devices
• F24C 3/12 - Arrangement or mounting of control or safety devices

Abstract

The present invention relates to an immersed continuous flow membrane filtration device and a method for backwashing the same, the device being characterized by comprising a filtration supply unit, an immersed membrane filtration unit, a filtration discharge unit, a backwashing injection unit, a backwashing discharge unit, and a flow rate control unit. Therefore, the present invention is advantageous in that a part of filtered water, which has been filtered in an immersed membrane filtration process, is made to flow backwards and used as backwashing water, and flow rates of inflowing water and filtered water are controlled; as a result, the membrane filtration device requires no treated water reservoir, thereby improving space efficiency, and filtered water of the same flow rate can be discharged during a rear stage process even when a part of an immersed separation membrane is backwashed.

IPC Classes  ?

• B01D 65/02 - Membrane cleaning or sterilisation
• B01D 63/00 - Apparatus in general for separation processes using semi-permeable membranes
• B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
• B01D 61/20 - Accessories; Auxiliary operations

Abstract

The present inventions relates to an apparatus for purifying wastewater and a method thereof, which comprises: a stirring part to make bubbles impregnated into floc through high speed stirring by adding floc forming materials to influent and stirring them; an air supply part to supply air to the stirring part to make more bubbles impregnated; a pumping part to conduct pressurized conveying of the floc included treatment water; a cyclone part to separate high density floc to downstream and treatment water with low density floc to upstream from the pressurized treatment water; and a flotation part to separate floc from the treatment water with floc supplied from the cyclone part. Therefore, the present invention have an effect that it is possible to improve purification speed of wastewater and obtain good quality of purified water.

IPC Classes  ?

• C02F 1/24 - Treatment of water, waste water, or sewage by flotation
• C02F 9/02 - Multistep treatment of water, waste water or sewage involving a separation step
• C02F 1/38 - Treatment of water, waste water, or sewage by centrifugal separation
• C02F 9/00 - Multistage treatment of water, waste water or sewage
• C02F 1/00 - Treatment of water, waste water, or sewage
• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/74 - Treatment of water, waste water, or sewage by oxidation with air
• C02F 103/00 - Nature of the water, waste water, sewage or sludge to be treated

Abstract

The present invention relates to a device for equalizing an air blast in a regenerating chamber of a hot blast stove, which is a device for equalizing an air blast in a regenerating chamber of a hot blast stove which is installed in a bottom space of a regenerating chamber of a hot blast stove, the device being characterized by comprising an air blast inlet which is provided on the lower part of the regenerating chamber of the hot blast stove and allows an inflow of an air blast; and an air blast equalizing unit which is provided to the air blast inlet and sends an air blast downward in the regenerating chamber and maintains the air blow equal in the bottom space of the regenerating chamber. Accordingly, according to the present invention, by installing various forms of hot blast equalizing units to a hot blast inlet formed on the lower part of a regenerating chamber of a hot blast stove, a turbulent flow is produced in the air blast and the air blast is equally distributed in the inner space of the regenerating chamber, consequently an effect of increasing the overall heat efficiency in the hot blast stove is provided.

IPC Classes  ?

• C21B 9/00 - Stoves for heating the blast in blast furnaces
• C21B 9/10 - Other details, e.g. blast mains

Abstract

The present invention relates to a multi-partition internal combustion hot blast stove having a composite structure, comprising: a main body formed into a cylindrical shape; a partition unit arranged in the vertical direction in the main body so as to partition the internal space of the main body into multiple spaces; and a plurality of hot blast units partitioned by the partition unit in the main body so as to sequentially supply hot air to a blast furnace. As described above, the multi-partition internal combustion hot blast stove of the present invention is configured such that the internal space of a single main body is partitioned into multiple spaces so as to have the plurality of hot blast units to sequentially supply hot air into the blast furnace. Thus, the area required for installation of the hot blast stove is reduced, and the space between the hot blast stove and the blast furnace is reduced so as to prevent thermal loss of hot air.

IPC Classes  ?

• C21B 9/00 - Stoves for heating the blast in blast furnaces

Abstract

The present invention relates to a controlled filtered water pressure membrane filtration apparatus and to a membrane-cleaning method therefor. The membrane filtration apparatus that branches supplied water and filters the water using a separation membrane includes: a plurality of filtering supply units; a plurality of membrane filtration units that filter the supplied water; a plurality of filtering discharge units that discharge filtered water; a backwash cleaning input unit that reverse-cleans some of the filtered water through backflow; a backwash discharge unit that discharges backwashed treated water to the outside; and a pressure control unit that controls the pressure of the backwashed filtered water. According to the present invention, some of the filtered water filtered through a membrane filtration process is used as the backwashed water through the backflow, and the pressure of the backwashed filtered water is controlled such that a tank for storing the treated water is not necessary in the membrane filtration apparatus. Accordingly, the efficiency of space usage can be increased, and the pressure of the backwashed filtered water is controlled such that backwash efficiency can be improved.

IPC Classes  ?

• B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
• B01D 65/02 - Membrane cleaning or sterilisation
• B01D 65/08 - Prevention of membrane fouling or of concentration polarisation
• B01D 63/00 - Apparatus in general for separation processes using semi-permeable membranes

Abstract

The present invention relates to a wastewater-purifying apparatus and to a wastewater-purifying method. The wastewater-purifying apparatus comprises: a stirring unit for feeding a material for forming flocs into inflow water and stirring the resultant material at a high speed so as to enable the flocs to be impregnated with bubbles; an air supply unit for supplying air such that the flocs can be impregnated with more bubbles; a pumping unit for the pressurized transfer of water to be treated; a cyclone unit for separating high-density flocs to a lower stream and separating the water to be treated including low-density flocs to an upper stream; and a floating separation unit for receiving the water to be treated including the low-density flocs and separating the flocs. Thus, the apparatus and method of the present invention have the effects of improving wastewater purification speed and improving the quality of the purified water.

IPC Classes  ?

• C02F 1/24 - Treatment of water, waste water, or sewage by flotation
• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material
• C02F 7/00 - Aeration of stretches of water

Abstract

The present invention relates to a membrane filtering device without treated water storage, which includes a plurality of filtering pumps for supplying supply water, a separation membrane filter for filtering the supply water by a separation membrane, a filtered water valve for regulating the discharge of filtered water, a backwashing valve for regulating the backwashing of the filtered water, a backwashing pump for distributing the backwashing water to a separation membrane filter, and a back washing water valve regulating the supply of the backwashing water. Accordingly, the present invention prevents recontamination of a separation membrane due to backwashing by improving space efficiency of the membrane filtering device and preventing contamination caused by remaining filtered water, and improves energy efficiency by reducing driving energy of an after treatment process.

IPC Classes  ?

• B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
• B01D 65/08 - Prevention of membrane fouling or of concentration polarisation
• B01D 65/02 - Membrane cleaning or sterilisation
• B01D 63/00 - Apparatus in general for separation processes using semi-permeable membranes

Abstract

The present invention allows obtainment of filtered water having a superior water quality while requiring a short time for removing a plug, by disclosing a method for purifying waste water comprising: a plug formation step of forming the plug by inserting a material for forming a plug in waste water and mixing same in a mixing tub (100); a cyclone separation step of separating the waste water comprising the plug into waste water including a high-density plug and waste water including a low-density plug by means of a hydro cyclone (200); and a rising separation step of separating the waste water comprising the low-density plug into the low-density plug and filtered water by means of a rising separation tub (300).

IPC Classes  ?

• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/24 - Treatment of water, waste water, or sewage by flotation
• B01D 21/26 - Separation of sediment aided by centrifugal force

Abstract

The present invention relates to a rotor blade for a tidal power generating turbine and a method for manufacturing same, the rotor blade comprising: a rotor hub unit combined with a rotation axis of a turbine; a blade root unit combined symmetrically with the rotor hub unit to support a blade; a blade body unit where a plurality of blade blocks are sequentially combined with the blade root unit to form an airfoil shape of the blade; and a blade tip unit combined with the edge of the blade body unit to form a blade tip. Therefore, the present invention has the effects of, by dividing the blade body unit into a plurality of block shapes for assembly, the mass production of the blade being possible, moldability being superior, and the molding of a curved surface of a fine airfoil also being possible.

IPC Classes  ?

• F03B 13/26 - Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
• F03B 3/12 - Blades; Blade-carrying rotors
• F03B 17/06 - Other machines or engines using liquid flow, e.g. of swinging-flap type
• F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
• F01D 5/14 - Form or construction

Abstract

The present invention relates to an apparatus for injecting hot air into an electric furnace, which can adjust the height up to which hot air is injected into the electric furnace so as to increase the contact area between the hot air and molten iron loaded into the electric furnace using a plurality of lances which can be elevated and which are connected to each other. According to one embodiment of the present invention, the apparatus for injecting hot air into an electric furnace includes: an injection part (200) including a plurality of lances (210, 220) which can be elevated and which are connected to each other so as to inject hot air into an electric furnace (C); an elevation-driving part (300) connected to each of the plurality of lances (210, 220) so as to elevate the plurality of lances (210, 220), wherein the elevation driving part adjusts the height up to which hot air is injected into the electric furnace (C) so as to increase the contact area between the hot air and molten iron (M) loaded into the electric furnace (C); and a hot air supply part (400), one side of which is connected to a hot air supply source and the other side of which is connected to one of the plurality of lances (210, 220) so as to supply the hot air.

IPC Classes  ?

• C21C 5/46 - Constructional features of converters - Details or accessories

Abstract

The present invention relates to a silicate-formate-based organic/inorganic composite composition capable of being used in a coastal concrete structure constructed on the coast and the coastal reclaimed land, and a concrete composition by applying the same, and more specifically, to a silicate-formate-based organic/inorganic composite composition capable of inhibiting the shrinkage of a concrete structure and enhancing the resistance against the penetration of chloride ions and sulfate ions and the corrosion resistance of an iron bar, and a concrete composition by applying the same. If the silicate-formate-based organic/inorganic composite composition of the present invention is applied, the shrinkage of a coastal concrete structure constructed on the coast and the coastal reclaimed land can be suppressed, and the resistance against the penetration of chloride ions and sulfate ions and the corrosion resistance of an iron bar can be enhanced.

IPC Classes  ?

• C04B 22/12 - Acids or salts thereof containing halogen in the anion, e.g. calcium chloride
• C04B 24/16 - Sulfur-containing compounds
• C04B 24/04 - Carboxylic acids; Salts, anhydrides or esters thereof
• C04B 18/08 - Flue dust

Abstract

The present invention pertains to a composite girder for bridge construction. More preferably, a girder is formed in a rectangular shape that is horizontally long and opened at the top portion thereof, wherein the girder is convexly curved in the center so as to be formed in the shape of an arc. The girder has a compression section, a web, and a tension section that is integrally composed together; and is filled with concrete inside so as to increase the sectional strength of the girder. Therefore, it is possible to reinforce a support that receives a great shearing stress even without the use of any rebar. Simultaneously, a stopper is formed on the inside surface of the compression section to prevent the separation of the steel materials and the concrete. Therefore, compared with the existing girders, the composite girder of the present invention may be mounted over a noticeably long span. In addition, it is possible to reduce manufacturing costs by minimizing the use of expensive steel reinforcement materials, exhibiting sufficient strength characteristics in spite of a small dead load.

IPC Classes  ?

• E01D 2/00 - Bridges characterised by the cross-section of their bearing spanning structure
• E04C 3/293 - Joists; Girders, trusses, or truss-like structures, e.g. prefabricated; Lintels; Transoms built-up from parts of different materials the materials being steel and concrete

Abstract

The present invention relates to a furnace for reducing ore containing an iron oxide component, comprising a charge inlet port (110) into which a charge is inserted, and a reduced gas intake port (170) into which reduced gas is blown, wherein the charge inlet port (110) is formed on the upper portion, and the reduced gas intake port (170) is provided at the center of the lower portion. According to the present invention, the reduced gas can be distributed evenly by blowing the reduced gas into the center of the lower portion of the furnace, thereby increasing the reduction rate of the charge inside the furnace and rendering a uniform reduction rate between the particles of the charge.

IPC Classes  ?

• C21B 13/02 - Making spongy iron or liquid steel, by direct processes in shaft furnaces

Abstract

Disclosed herein is an apparatus for moving a snorkel in a chemical-heating-in-snorkel (CHIS or CAS-OB) refining facility. The CHIS(CAS-OB) refining facility includes a ladle having a plurality of porous plugs formed in the bottom thereof, a snorkel mounted to an arm vertically movably assembled to a column such that the lower end of the snorkel is deposited in molten steel contained in the ladle, and a blowing lance having a lower end extending into the snorkel, thereby increasing the temperature of the molten steel contained in the ladle. The snorkel moving apparatus includes a snorkel transfer car having wheels mounted at both right and left sides thereof such that the snorkel transfer car can be reciprocated along guides mounted at both right and lefts ends of the arm, the upper part of the snorkel being assembled to the snorkel transfer car, and at least one actuating member, having an operational end thereof connected to one end of the snorkel transfer car, for providing an external force necessary to move the snorkel transfer car forward and backward along the guides. According to the present invention, it is possible to selectively locate the snorkel above one porous plug whose opening state is good, thereby improving the facility operation rate and operation success rate. Therefore, it is possible to exclude the provision of an additional facility due to the poor opening state of the porous plug, thereby accomplishing the construction of an economical and efficient facility.

IPC Classes  ?

• C21C 7/00 - Treating molten ferrous alloys, e.g. steel, not covered by groups
• C21C 7/10 - Handling in vacuum

Abstract

A degassing apparatus having duplex vacuum vessels for removing impurity gases from molten steel by backflow of molten steel thereby homogenizing molten steel composition. The apparatus includes duplex vacuum vessels of first and second vacuum vessels fixedly arranged at a predetermined interval to a floor which is provided horizontally at a predetermined height from a bottom; first and second ladle carriages arranged to run on first and second rails, respectively, to reciprocate between a treatment position directly under the first and second vacuum vessels and a tapping position where refined molten steel is tapped, each of the first and second ladle carriage loaded with a corresponding one of first and second ladles; and first and second lifting cylinders each for raising and lowering each of the first and second ladles in the treatment position so that a bottom end of each of the first and second vacuum vessels is immersed by molten steel in each of the first and second ladles. The apparatus can remove limiting factors of suspending a continuous vacuum degassing refining process and thus prolong lifetime of the vacuum vessel and save manufacturing cost.

IPC Classes  ?

• C21C 7/10 - Handling in vacuum