Disclosed in the present invention is an external dehumidification device for a low-pressure wet steam intermediate machine of a steam turbine, comprising a shell provided with a wet steam inlet and a dry steam outlet, and further comprising first-stage steam-water separation corrugated plates and second-stage steam-water separation corrugated plates which are arranged in the shell, wherein the second-stage steam-water separation corrugated plates are arranged downstream of the first-stage steam-water separation corrugated plates, and the distance between every two adjacent corrugated plates among the first-stage steam-water separation corrugated plates is greater than the distance between every two adjacent corrugated plates among the second-stage steam-water separation corrugated plates. According to the present invention, the resistance to steam is reduced on the whole, smooth flow of steam is ensured, the dehumidification efficiency is improved, water-steam separation is carried out twice, and the technical means of coarse dehumidification and fine dehumidification effectively ensures the dehumidification effect. In addition, by means of the arrangement of a gland steam pipe, it can be ensured that the dryness of the steam reaches 100%, thereby reducing the operation risk of the steam turbine, and improving the steam-water cycle efficiency.
B01D 45/08 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge par inertie par projection contre les diaphragmes séparateurs
B01D 45/02 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge par gravité
B01D 45/16 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge produite par le mouvement hélicoïdal du courant gazeux
F01D 25/32 - Recueil de l'eau de condensationDrainage
2.
STEAM PREHEATING SYSTEM, STEAM PREHEATER AND GARBAGE INCINERATOR
Disclosed in the present invention is a steam preheating system. The steam preheating system comprises at least one steam heating unit having a condensation section, a subcooling section and a liquid level tank, wherein the condensation section is configured to introduce steam, a liquid discharge port of the condensation section being in communication with the subcooling section by means of the liquid level tank; the liquid level tank is in communication with a steam introduction port of the condensation section by means of a steam balance pipe, condensate water drained from the condensation section through the liquid discharge port flowing into the liquid level tank by means of the gravity of the condensate water; the subcooling section is connected to a drain pipe configured to output the condensate water and provided with a drain regulation valve; and the opening degree of the drain regulation valve is controlled according to a liquid level signal of the liquid level tank. The steam preheating system uses a steam heating unit to heat a medium to be heated, and drained water in a condensation section into which high-pressure steam has been introduced is input into a subcooling section by means of a liquid level tank to exchange heat with said medium again in order that the temperature of the drained water reaches a certain subcooling, thus reducing the intensity of flash evaporation occurring in the drained water after the drain regulation valve in the drain pipe connected to the subcooling section, and being conducive to prolonging the service life of the drain pipe. Further disclosed in the present invention are a steam preheater and a garbage incinerator.
Provided in the present invention is a flue gas waste heat coupled condensation water-return heating system. The heating system can be divided into a garbage incineration flue gas emission system, a condensed water heating system and a closed circulating water system according to the circulation of different media. A boiler, a dust collector, a flue gas–steam heat exchanger, an SCR denitrification apparatus, a low-temperature economizer and an induced draft fan are sequentially connected by means of a flue. A steam turbine, a condenser, a low-pressure heater, a water-water heat exchanger, a deaerator and a boiler water-supply pump are sequentially connected by means of a condensed water channel. The deaerator, a circulating water pump, the water-water heat exchanger and the low-temperature economizer are sequentially connected by means of a circulating water pipe. A path of circulating water is led from low-pressure water supply of the deaerator to the water-water heat exchanger so as to heat condensed water from an outlet of the low-temperature heater; and cooled circulating water is fed to the low-temperature economizer, and returns to the deaerator again after being subjected to heat exchange with flue gas, thereby forming an independent closed circulating water system. By utilizing the characteristic of the constant water temperature of the outlet of the deaerator, the influence of parameter fluctuation of the condensed water can be effectively overcome, thereby ensuring that the low-temperature economizer has no low-temperature corrosion.
F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne
F22D 1/50 - Appareils de chauffage d'eau d'alimentation, p. ex. préchauffeurs comprenant une désaération thermique de l'eau d'alimentation
4.
METHOD AND APPARATUS FOR CONTROLLING OPERATION OF GRATE OF GARBAGE INCINERATOR
Disclosed in the present application are a method and apparatus for controlling the operation of a grate of a garbage incinerator, which are used for controlling a grate operating in multiple sections. The method comprises: correcting a reference speed of a grate by using an actual material layer thickness of garbage on the grate, so as to obtain a corrected speed; adjusting the corrected speed according to the environment where any one or more sections in the grate are located, so as to obtain a speed respectively corresponding to each section in the grate; and adjusting an actual operation speed of each section in the grate by using the speed respectively corresponding to each section in the grate. In the present application, a reference speed of a grate can be corrected in view of the actual situation of fuel on the grate, thereby effectively improving the reliability of the grate during operation; and on this basis, the actual situation of each section in the grate during the operation of the grate is further taken into consideration, and an actual operation speed of each section in the grate is adjusted in view of the actual situation of each section in the grate during operation, such that the reliability of the grate of a garbage incinerator during operation can be further improved.
Disclosed in the present invention is a fire grate frame cooling system, comprising: a fire grate frame, having a cooling medium flowing cavity, and the fire grate frame being provided with a fire grate frame inlet and a fire grate frame outlet which communicate with the cooling medium flowing cavity; a static fire grate beam, being of a tubular structure, and the two ends of the static fire grate beam both communicating with the cooling medium flowing cavity; and a cooling medium tank, being used for containing a cooling medium and being provided with a medium tank outlet communicating with the inlet of the fire grate frame so as to supply the cooling medium into the cooling medium flowing cavity. The present invention can forcibly cool the fire grate frame and the static fire grate beam by means of the cooling medium so as to reduce the environment temperatures of the fire grate frame and the static fire grate beam, thereby stabilizing the structural strength of the apparatus, preventing the materials of the fire grate frame and the static fire grate beam from deformation and distortion at high temperature, prolonging the service life of the fire grate frame and the static fire grate beam, and avoiding high-temperature damage and performance reduction of oil cylinder sealing, bearings and the like. Also disclosed in the present invention is an incinerator.
F23G 5/44 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres Parties constitutivesAccessoires
Disclosed in the present invention is a grate frame, comprising: a frame body; grate side beams, each provided with a grate side beam vent chamber, a grate side beam air inlet and grate side beam air outlets, the grate side beams being provided on two sides of the top of the frame body, and the grate side beam air outlets being located at the tops of the grate side beams; and a plurality of side edge grate blocks, sequentially arranged at the tops of the grate side beams, wherein vent channels communicated with the grate side beam air outlets are formed between the side edge grate blocks and the grate side beams, and a vent gap separately communicated with a corresponding vent channel and a hearth is formed between every two adjacent side edge grate blocks. According to the present invention, the grate side beams of the grate frame can be forcibly cooled by introducing cooling air into the grate side beams, so as to reduce the environment temperature of the grate frame, and prevent the grate frame from deforming at high temperature, thereby prolonging the service life of the grate frame. Since the temperature of the cooling air rises after the cooling air exchanges heat with the grate side beams, the cooling air reaches a combustion-supporting temperature and flows into the hearth to achieve a combustion-supporting effect. Further disclosed in the present invention are a grate section and an incinerator.
F23G 5/44 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres Parties constitutivesAccessoires
Disclosed in the present invention is a grate driving mechanism cooling system, comprising: fixed cross beams which are of hollow tubular structures, the plurality of fixed cross beams being sequentially communicated end to end, and a fixed cross beam inlet pipe and a fixed cross beam outlet pipe being provided at two ends of a fixed cross beam cooling channel, respectively; movable cross beams which are of hollow tubular structures, the plurality of movable cross beams being sequentially communicated end to end, and a movable cross beam inlet pipe and a movable cross beam outlet pipe being provided at two ends of a movable cross beam cooling channel, respectively; and a cooling medium tank supplying a cooling medium to the fixed cross beam cooling channel and the movable cross beam cooling channel. According to the present invention, the fixed cross beams and the movable cross beams can be forcibly cooled, so that the environment temperature of the fixed cross beams and the movable cross beams is reduced, the materials of the fixed cross beams and the movable cross beams are prevented from being deformed and twisted at a high temperature, the service life is prolonged, and high-temperature damage and performance degradation of parts around a grate, such as an oil cylinder seal and a bearing, can be avoided. Further disclosed in the present invention is an incinerator.
F23G 5/44 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres Parties constitutivesAccessoires
A flue gas backflow system of a waste incineration waste heat boiler, comprising an electrostatic precipitator (1), an electric inlet adjustment damper (2), a backflow fan (3), an outlet electric shutoff baffle door (4), a flue gas check valve (5), a manual shutoff valve (6), a flue gas pipe box (7), and a spray nozzle (8) connected in sequence from a waste incineration boiler flue gas outlet, the spray nozzle (8) being arranged on a rear side wall flue gas pipe box of a third flue of the boiler. After the tail gas of the boiler passes through the electrostatic precipitator (1), some of the clean flue gas is extracted by the backflow fan (3) and sent to the rear side wall pipe box of three flues of the boiler, and is sprayed at positive pressure and high speed into the three flues for disturbance mixing with the high temperature flue gas in the flues. The backflow flue gas of the present system is sprayed into the flue in the middle of the third flue and implements full disturbance mixing with the high temperature flue gas, effectively improving the unevenness of the temperature field and speed field of the third flue, and improving the thermal efficiency of the boiler.
F23G 5/44 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres Parties constitutivesAccessoires
9.
ENERGY-SAVING ULTRALOW FLUE GAS PURIFICATION SYSTEM FOR WASTE INCINERATION
An energy-saving ultralow flue gas purification system for waste incineration, comprising a high-speed rotary atomizer (1), a semi-dry reaction tower (2), a baghouse filter (8), an SCR reaction tower (9), a water medium type flue gas cooler (11), an induced draft fan (13), and a chimney (14). An upper portion of the semi-dry reaction tower (2) is provided with the high-speed rotary atomizer (1); a sodium bicarbonate dry powder injection device (6) and an activated carbon injection device (7) are provided on a flue between the semi-dry reaction tower (2) and the baghouse filter (8); and flue gas enters the SCR reaction tower (9) from the baghouse filter (8), and after the catalytic denitrified flue gas passes through the water medium type flue gas cooler (11) and is cooled to 130°C, the flue gas is discharged into the chimney (14) by means of the induced draft fan (13).
B01D 53/10 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants mobiles avec adsorbants dispersés
B01D 46/02 - Séparateurs de particules comportant des filtres creux faits en un matériau souple, p. ex. appareils de précipitation de poussières
10.
SPRAY GUN OF AUTOMATIC CONTROL SYSTEM FOR WATER SPRAYING AND COOLING OF GARBAGE INCINERATOR
A spray gun (7) of an automatic control system for the water spraying and cooling of a garbage incinerator. The front end of the spray gun is provided with an industrial water pipe port (21) and an atomized compressed air port (22), and the spray gun (7) is fixed to a compressed air cylinder (23). An industrial water pipe from a water delivery pump (4) is connected to the port (22) of the spray gun, enters the spray gun (7) and sprays into the incinerator. Compressed air from a compressed air main pipe (11-1) enters the left and right sides of the incinerator and is then divided into three branch pipes. Branch pipes (11-2, 11-7) are respectively connected to the port (22) of the spray gun and enter a two-fluid spray gun to atomize industrial water entering the port (21). Branch pipes (11-3, 11-6) respectively pass through solenoid valves (9-1, 9-2) and are then divided into two paths to connect to cylinder ports (26-1) and (26-2). The compressed air pushes a cylinder piston to drive the spray gun (7) to move forward and backward by means of the action of the solenoid valves (9-1) and (9-2). Compressed air branch pipes (11-4) and (11-5) are respectively connected to a cylinder port (20) and the compressed air is sprayed into a sleeve (19) to cool the spray gun (7) continuously, so as to prevent the spray gun (7) from being burned by high-temperature smoke.
A high-temperature high-pressure waste incinerator has a main steam temperature of 540 ℃ and a main steam pressure of 9.8 MPa. The waste incinerator employs a water-cooled combustion chamber (4), and has a first channel (5), a channel (21), a second channel (6) and a third channel (7) sequentially arranged along a direction in which a flue gas flows. The channel (21) communicates the first channel with the second channel. A platen superheater (9) is provided at an upper portion of the second channel (6). The platen superheater (9) can heat steam to 540 ℃, thereby increasing thermal efficiency of an auxiliary turbogenerator system in a waste incineration-based power plant to 34%.
A water-cooled grate of a waste incinerator. Grate bars constituting the water-cooled grate are each provided with a water chamber. The water chamber of each grate bar is M-shaped, such that temperature differences across the entire grate in a width direction are minimized. Compared with an air-cooled grate, the present grate bar reduces the emission of flue gas and improves the service life of the grate.
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