Abstract

A cyclone combustion apparatus, a combustion device, and a combustion method. The cyclone combustion apparatus comprises a cyclone cylinder (1), a primary air pipe (2), a secondary air pipe (3), and a flue gas discharging pipe (5). The cyclone cylinder (1) is vertically arranged and is provided with a cyclone combustion chamber, a primary air nozzle, a secondary air nozzle, a flue gas outlet, and a slag capturing port (4). The primary air nozzle and the secondary air nozzle are both located on the upper part of the cyclone cylinder (1), and the flue gas outlet is located in the top of the cyclone cylinder (1). The combustion device comprises the cyclone combustion apparatus and a supplementary combustion apparatus located in the downstream of the cyclone combustion apparatus. The supplementary combustion apparatus comprises a supplementary combustion chamber (6). The supplementary combustion chamber (6) is provided with a flue gas inlet a supplementary air nozzle (7). The other end of the flue gas discharging pipe (5) of the cyclone combustion apparatus opposite to the bottom end communicates with the flue gas inlet. The combustion method comprises: introducing primary air containing fuel powder to a cyclone combustion chamber through a primary air nozzle, introducing secondary air to the cyclone combustion chamber through a secondary air nozzle, introducing flue gas generated when the fuel powder is combusted in the cyclone combustion chamber, into a supplementary combustion chamber (6), and introducing supplementary air to the supplementary combustion chamber (6) through a supplementary air nozzle (7), so as to enable combustible matter in the flue gas to be completely combusted.

IPC Classes  ?

• F23C 7/00 - Combustion apparatus characterised by arrangements for air supply

Abstract

A lignite semi-coke oxygen deficient combustion boiler, comprising multiple cyclone oxygen deficient combustion means and a boiler body. The boiler body comprises a secondary combustion chamber (5), as well as a boiler heated surface (3) and a smoke discharge port (4) provided on the upper part of the secondary combustion chamber (5); the cyclone oxygen deficient combustion means is an inverted heat-insulating cyclone separator provided with a center cylinder (2); each cyclone oxygen deficient combustion means is connected to the secondary combustion chamber (5) of the boiler body. The lignite semi-coke oxygen deficient combustion boiler has high combustion intensity, a high slag capture rate, low pollutant discharge, and a wide load adjustment range.

IPC Classes  ?

• F22B 31/02 - Installation of water-tube boilers in chimneys, e.g. in converter chimneys
• F23C 7/02 - Disposition of air supply not passing through burner
• F23L 9/00 - Passages or apertures for delivering secondary air for completing combustion of fuel

Abstract

A micro-gas combustion gun body, an ignition burner, a coal powder combustion system, and a coal-fired boiler, wherein the micro-gas combustion gun body comprises a combustion air duct (21), a gas supply device and an ignition device (24); the combustion air duct (21) comprises a combustion air inlet (211) and a flame opening (212); the gas supply means comprises a plurality of gas outlet parts, and the plurality of gas outlet parts and an ignition end of the ignition device (24) are disposed in the combustion air duct (21), the ignition end of the ignition device (24) is used to ignite the gas emitted from the plurality of gas outlet parts. Due to the gas supply device in the micro-gas combustion gun body comprising a plurality of gas outlet parts, during an ignition process, the micro-gas combustion gun body has a plurality of ignition points therein, and the plurality of ignition points can ignite each other and act as a combustion aid reciprocally. Hence, the micro-gas combustion gun body has a more stable flame.

IPC Classes  ?

• F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
• F23Q 7/02 - Incandescent ignitionIgnition using electrically-produced heat, e.g. lighters for cigarettesElectrically-heated glowing plugs for igniting solid fuel
• F23C 5/08 - Disposition of burners

Abstract

Disclosed are a pulverised coal burner and a boiler using the pulverised coal burner, wherein the pulverised coal burner comprises a central air cylinder (46, 56), a primary air cylinder (42, 52) and a twin flow field generating structure provided in the primary air cylinder (42, 52). The primary air cylinder (42, 52) is sheathed outside the central air cylinder (46, 56); the twin flow field generating structure can make the concentration of pulverised coal as an air flow containing powders that passes through the twin flow field generating structure and is injected by the primary air cylinder (42, 52) distributed as sparse on the outside and dense on the inside, and can form an annular recirculation area (12, 32, 63) between a sparsely concentrated air flow containing powders (65) and a highly concentrated air flow containing powders (64), and form a central recirculation area (24, 62, 71) in the highly concentrated air flow containing powders (64). The burner can more effectively inhibit production of NOx.

IPC Classes  ?

• F23D 1/02 - Vortex burners, e.g. for cyclone-type combustion apparatus

Abstract

The present invention relates to a pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Primary burners including primary air spouts, secondary air spouts and close coupled overfire air spouts arranged at intervals along the height direction of a hearth are arranged on four corners of the hearth. Two-way wall-attachment secondary air spouts and one-way wall-attachment secondary air spouts are arranged from bottom to top in a primary combustion zone where the primary burners are located. One-way wall-attachment secondary air spouts are arranged in a reduction zone between the primary burners and the top overfire air spouts, and grid overfire air spouts are arranged in a burnout zone where the overfire air is supplied. By adopting the pulverized coal fired boiler with wall-attachment secondary air and grid overfire air according to the present invention, the NO amount generated in the hearth is reduced, the NO reduction rate along a flame is improved, the coke burnout rate is improved, less coke which is not burnt out enters into the burnout zone, slagging on the water-cooled wall is reduced, and ultralow emission of NOx may be realized on the premise that the combustion efficiency is not reduced, slag is not agglomerated in the hearth and the flue gas temperature deviation is small.

IPC Classes  ?

• F23C 1/00 - Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in air
• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23L 9/02 - Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air above the fire
• F23L 9/04 - Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air beyond the fire, i.e. nearer the smoke outlet
• F23C 5/32 - Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
• F23C 7/02 - Disposition of air supply not passing through burner
• F23J 3/00 - Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers

Abstract

An ignition combustor for supporting combustion with pure oxygen comprises a combustor (1) and an ignition source. The rear end of the combustor (1) is connected to a fuel gas flow channel. A primary cylinder (3) is disposed at the outer side of the front end of the ignition source, a secondary cylinder (5) is disposed at the outer side of the front end of the primary cylinder (3), the secondary cylinder (5) is at least partially disposed in the combustor (1), and an oxygen jetting apparatus (4) for directly jetting oxygen to a flame combustion area is disposed in at least one of the flowing items: a nozzle of the primary cylinder (3), a nozzle of the secondary cylinder (5), and a nozzle of the combustor (1). By means of the ignition combustor, after pulverized coal is fired, pure oxygen is jetted in, and the combustion is intensified, and the problem is solved that the ignition energy is sufficient but the subsequent combustion is insufficient when coal in poor quality is ignited. The combustor has a reasonable structure, can operate stably for a long time without slag bonding and burning accidents, and is suitable for all internal combustion ignition pulverized coal combustors comprising plasma ignition combustors as well as ignition combustors of small oil guns, micro oil ignition and the like.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23Q 7/02 - Incandescent ignitionIgnition using electrically-produced heat, e.g. lighters for cigarettesElectrically-heated glowing plugs for igniting solid fuel
• F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam

Abstract

A pulverized coal fired boiler with wall-attachment secondary air and grid overfire air. Main combustors (4) having primary air nozzles (6), secondary air nozzles (7), and close coupled overfire air nozzles (5) arranged at interval along a height direction of a hearth (1) are disposed at four corners of the hearth (1). A bidirectional wall-attachment secondary air nozzle (11) and a one-way wall-attachment secondary air nozzle (10) are arranged from bottom to top in a main combustion area (111) where the main combustor (4) is located. A one-way wall-attachment secondary air nozzle (9) is provided in a reduction area (112) between the main combustor (4) and a top overfire air nozzle. A grid overfire air nozzle (8) is provided in a burn-off area (113) where overfire air is located. The pulverized coal fired boiler with wall-attachment secondary air and grid overfire air reduces the amount of NO generated in the hearth (1), improves the reduction rate of NO along the flame, and improves the burn-off rate of the coke, so that only little unburned coke enters the burn-off area (113). Therefore, slagging on a water wall (2) is reduced, and ultra-low NOx emission is achieved while the combustion efficiency is not reduced, slags are not agglomerated in the hearth (1), and the gas temperature deviation is small.

IPC Classes  ?

• F23C 5/08 - Disposition of burners
• F23C 5/24 - Disposition of burners to obtain a loop flame
• F23C 7/00 - Combustion apparatus characterised by arrangements for air supply
• F23L 9/00 - Passages or apertures for delivering secondary air for completing combustion of fuel

Abstract

Disclosed are an oil gasification burner and an internal combustion burner comprising the oil gasification burner. The oil gasification burner comprises a first stage gasification flame generator, wherein the first stage gasification flame generator comprises an air distributing barrel (4), a gasifier (3) arranged in the air distributing barrel (4), a gasifier oil inlet pipe (5) connected to the gasifier (3) for the transportation of fuel oil to the gasifier (3), an atomizing nozzle (8) fitted in the air distributing barrel (4) and connected to the gasifier (3) via an oil pipe, and an ignition gun (7) plugged into the air distributing barrel (4) for the ignition of the fuel oil which is ejected by the atomizing nozzle (8). The oil gasification burner improves the efficiency of combustion, both saving energy and protecting the environment.

IPC Classes  ?

• F23D 11/00 - Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
• F23D 11/38 - NozzlesCleaning devices therefor
• F23D 11/44 - Preheating devicesVaporising devices

Abstract

Disclosed are a pulverized coal burner and a pulverized coal fired boiler comprising same. The pulverized coal burner comprises an ignition heat source (310), a pulverized coal concentration device (100), and a main body segment (200) connected to the pulverized coal concentration device. A dense-phase pulverized coal flow section and a light-phase pulverized coal flow section are formed inside the pulverized coal concentration device (100). A separator (210) is disposed within the main body segment along the pulverized coal flow direction to separate the main body segment (200) into a dense-phase pulverized coal passage (211) and a light-phase pulverized coal passage (221). The back end of the dense-phase pulverized coal flow section and the back end of the light-phase pulverized coal flow section are connected respectively to the front end of the dense-phase pulverized coal passage (211) and the front end of the light-phase pulverized coal passage (221). The ignition heat source (310) is located inside the dense-phase pulverized coal passage (211). When using the pulverized coal burner, the majority of the nitrogen in the pulverized coal forms N2, thus reducing fuel-type NOx produced by the continuous burning of pulverized coal inside the boiler.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23C 5/08 - Disposition of burners

Abstract

An anode of an arc plasma generator and the arc plasma generator are disclosed. The plasma generator is a multi-stage gas admission type arc plasma generator, and the plasma generator includes a cathode and an anode. The anode comprises at least two portions (201, 203), wherein any two adjacent portions of the anode are connected electrically with one another.

IPC Classes  ?

• H01J 17/26 - Means for producing, introducing, or replenishing gas or vapour during operation of the tube

Abstract

A pulverized coal concentrator for a pulverized coal burner, the concentrator is fixedly arranged inside the pulverized coal burner and comprises a front part (102) and a rear part (101), wherein the front part (1020 is designed as a bowl-shaped structure, for guiding and concentrating an air-pulverized coal flow, and the rear part (101) is designed as a cylinder-shaped structure, for maintaining a proper extension of the dense phase zone of the air pulverized coal flow. Also a pulverization coal burner is provided comprising the pulverized coal concentrator, in particular an internal combustion-type pulverized coal burner. The pulverized coal concentrator increases the adaptability of burner to coal quality, air velocity and pulverized coal density.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23K 3/02 - Pneumatic feeding arrangements, i.e. by air blast

Abstract

A pulverized coal burner and a pulverized coal boiler having it are provided. The pulverized coal burner comprises a primary air cylinder (111) and a pulverized coal concentration device (112). The pulverized coal concentration device (112) can make the concentration of the pulverized coal flow gradually decrease from inside to outside along the radial direction, with respect to an axial line (100) of the primary air cylinder (111). The pulverized coal burner further comprises a pulverized coal separation cylinder (113) and a pulverized coal guiding cylinder (114) located downstream of the pulverized coal concentration device (112), wherein the back end of the pulverized coal separation cylinder (113) is connected with the front end of the pulverized coal guiding cylinder (114). The outlet of the pulverized coal guiding cylinder (114) has a conical expansion corner (1141). The pulverized coal burner further comprises a divergent nozzle (115) which is connected with the back end of the primary air cylinder (111) and whose sectional area gradually increases along the flow direction of the pulverized coal flow. The expansion angle (γ) of the divergent nozzle (115) is not smaller than the expansion angle (β) of the pulverized coal guiding cylinder (114). The amount of generation of nitrogen oxides is reduced, as the rich pulverized coal flow and lean pulverized coal flow are separately burnt in the pulverized coal burner. The heating area of the pulverized coal flow is increased, and the slagging of the water-cooled wall near the outlet of burner is avoided.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel

Abstract

A pulverized coal burner comprises a heat source (200) and an internal combustion chamber (100) which can make the flow of the pulverized coal and air therein keep a predetermined excessive air coefficient. The heat source (200) is positioned in the internal combustion chamber (100). The internal combustion chamber (100) has an inlet (101), a long cylindrical main combustion chamber (120) and an outlet (102). The heat source (200) can ignite the pulverized coal passing though the internal combustion chamber (100) and realize reducing combustion of the pulverized coal in the internal combustion chamber (100). The internal combustion chamber (100) may also comprise a slowdown inlet segment (110), a speedup outlet segment (130) and an outlet adjustment segment (140), wherein the section areas of the slowdown inlet segment (110) and the speedup outlet segment (130) are less than that of the main combustion chamber (120). A boiler having the pulverized coal burner is provided, wherein the outlet (102) of the internal combustion chamber (100) of the pulverized coal burner is communicated with the hearth of the boiler.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23C 5/08 - Disposition of burners

Abstract

A method for decreasing nitrogen oxides of a pulverized coal boiler using burners of internal combustion type including during the operation of the boiler, ignition sources in the burners of internal combustion type mounted on side walls of the boiler are always in a working state, and igniting the pulverized coal in the burners in advance; decreasing secondary air amount in a primary combustion zone of the boiler so that the primary combustion zone is in a relatively strong reducing atmosphere and an oxygen-deficient condition for inhibiting generation of NOx is created; and supplying remaining air from an upper part of a furnace of the boiler in a form of over-fire air, so that a deep air staging is carried out in the total furnace. Thus, the NOx generation of combustion can be effectively controlled on the premise of not decreasing efficiency of the boiler.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel
• F23C 5/08 - Disposition of burners
• F23C 6/04 - Combustion apparatus characterised by the combination of two or more combustion chambers in series connection

Abstract

A pulverized coal concentrating device for a pulverized coal burner is provided. The pulverized coal concentrating device is fixedly disposed in the pulverized coal burner and includes a front part (102) and a rear part (101), wherein the front part (102) is designed to have a bowl-shaped structure used to guide and concentrate the air and powder flow, while the rear part (101) is designed to have a tubular structure used to maintain an appropriate extension of the dense phase area of the air and powder flow. Also provided is a pulverized coal burner, especially an internal-burning pulverized coal burner, that includes the pulverized coal concentrating device. The pulverized coal concentrating device improves the ability of the burner to adapt to coal quality, air speed and pulverized coal concentration.

IPC Classes  ?

• F23D 1/00 - Burners for combustion of pulverulent fuel

Abstract

An anode of an arc plasma generator and the arc plasma generator are disclosed. The plasma generator is a multi-stage admission type arc plasma generator, and the plasma generator includes a cathode and an anode. The anode includes at least two parts (201, 203), wherein any two adjacent parts of the anode are connected electrically.

IPC Classes  ?

• H05H 1/34 - Details, e.g. electrodes, nozzles

Abstract

A method of reducing nitrogen oxides of a pulverized coal boiler using inner combustion type burners (2) includes that all or part of burners of the pulverized coal boiler are arranged as or changed into the inner combustion type burners (2), in which the ignition sources may be plasma generators (1) or ignition devices such as small oil guns etc., and the power thereof can be adjusted for controlling the ignition intensity in the burners (2). The inner sides of the burners (2) are divided into several stage combustion chambers (5), and are provided with pulverized coal concentrators (4) which do deep fuel classification in the burners (2). During the boiler operating, the ignition sources always keep working state, and the pulverized coal in the burners (2) is ignited step by step and burned in advance. The air capacity of the secondary wind in a primary combustion zone (22) is reduced, which makes the primary combustion zone (22) be in strong reducing atmosphere, and creates a high temperature and hypoxia condition for inhibiting the generation of NOx. The remain air is supplied from the upper furnace in the form of burn-out wind, and does deep air classification in the total furnace. Thus, the NOx generation of combustion can be effectively controlled on the premise of not reducing the boiler efficiency.

IPC Classes  ?

• F23C 5/00 - Combustion apparatus characterised by the arrangement or mounting of burners
• F23D 1/00 - Burners for combustion of pulverulent fuel

Abstract

A burner ignited by plasma includes at least two stage of burning cylinders (104, 106) and a plasma generator (302) for igniting the pulverized coal in the first burning cylinder (104) of the at least two stage of burning cylinders (104, 106). The burning flame of the previous burning cylinder (104) ignites the pulverized coal in the subsequent burning cylinder (106), or further combusts with auxiliary air in the subsequent burning cylinder (106). The burner is characterized in that the axial direction of the plasma generator (302) is parallel with the direction of the air containing pulverized coal entering the first burning cylinder (104),and simultaneously parallel with the axis of the burning cylinders (104, 106).

IPC Classes  ?

• F23Q 7/02 - Incandescent ignitionIgnition using electrically-produced heat, e.g. lighters for cigarettesElectrically-heated glowing plugs for igniting solid fuel
• F23D 1/00 - Burners for combustion of pulverulent fuel

Goods & Services

Utility boiler and its auxiliary facilities; current generators; fittings for engine boilers; steam engine boilers; steam turbine; foundry machines; elevating apparatus; wind power engine facility; wind power generation facility; water power engine facility. Power station automatization equipment; electric apparatus for remote ignition; transducer; electric regulating apparatus; whole set electric checkout equipments; electric installations for the remote control of industrial operations; electric apparatus for commutation.

Goods & Services

[ Current generators; steam turbines; foundry machines; elevating apparatus, namely, elevating work platforms; wind power engine facilities, namely, generators for wind turbines; wind power generation facilities; water power engine facilities, namely, generators of electricity; electrically operated brushes being parts of machines; wind power machines, namely, wind-powered electricity generators and fittings thereof; fittings for engine boilers; steam engine boilers ] Power station automatization equipments, namely, industrial automation controls; electric apparatus for remote ignition, namely, rectifiers, electric voltage transformers for igniting at a distance; electrical transducers; electric regulating apparatus, namely, electrical controlling devices; whole set electric checkout equipments, namely, circuit testers [ ; electric apparatus for commutation, namely, commutators ] Plasma burners, steam air heaters

Goods & Services

(1) Current generators; steam turbines; foundry machines; elevating apparatus,namely, lifting work platforms; wind power engine facilities, namely, generators for wind turbines; wind-powered electricity generators; water power engine facilities, namely, generators of electricity; electrically operated brushes being parts of machines; wind power machines, namely, wind-powered electricity generators and fittings thereof; fittings for engine boilers; steam engine boilers. (2) Power station automatization equipments, namely, industrial automation controls; electric apparatus for remote ignition, namely, rectifiers, electric voltage transformers for igniting at a distance; electrical transducers; Electric Regulating apparatus,namely, electronic signals transmitters, Electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors, Electronic spectrophotometer for use in identifying and measuring colors, Electronical sensors for measuring solar radiation; Control panels (electricity), Remote control device, namely, Remote controls for adjustable beds, stereos and televisions; whole set electric checkout equipments, namely, circuit testers; electric apparatus for commutation, namely, commutators.