CN109631024A - A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified - Google Patents

A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified Download PDF

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Publication number
CN109631024A
CN109631024A CN201811548348.9A CN201811548348A CN109631024A CN 109631024 A CN109631024 A CN 109631024A CN 201811548348 A CN201811548348 A CN 201811548348A CN 109631024 A CN109631024 A CN 109631024A
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CN
China
Prior art keywords
air
flue gas
separation
combustion
boiler
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Application number
CN201811548348.9A
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Chinese (zh)
Inventor
陈智超
严蓉
张斌
张绍峰
曾令艳
李争起
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哈尔滨工业大学
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Priority to CN201811548348.9A priority Critical patent/CN109631024A/en
Publication of CN109631024A publication Critical patent/CN109631024A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08Disposition of burners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00Combustion apparatus characterised by arrangements for air supply
    • F23C7/02Disposition of air supply not passing through burner
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D1/00Burners for combustion of pulverulent fuel
    • F23D1/02Vortex burners, e.g. for cyclone-type combustion apparatus

Abstract

A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified, it is related to a kind of swirling pulverized coal combustion device.There are NO in order to solve existing coal powder boiler combustion device by the present inventionxThe problem of discharge amount height and burner hearth easy slagging.Flue gas recirculation system of the invention introduces the flue gas of boiler tail in combustion system separation secondary air ducts at different levels, and passes through valve regulated flue gas introduction volume;Flue gas recirculation system includes recirculation blower, flue gas recycled pipeline, multiple flue gas recycled pipeline valves, multiple separation secondary air duct valves and multiple flue gas recycled branch pipe(tube)s, each air of combustion system enters conduit upper equipped with a separation secondary air duct valve, each air enters pipeline and is connect by a flue gas recycled branch pipe(tube) with flue gas recycled pipeline, each flue gas recycled branch pipe(tube) is equipped with a flue gas recycled pipeline valve, and the arrival end of flue gas recycled pipeline is connect with recirculation blower.The present invention is used for industrial coal powder boiler.

Description

A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified
Technical field
The present invention relates to a kind of swirling pulverized coal combustion device and its burn processing methods, and in particular to a kind of to use flue gas again The swirling pulverized coal combustion device of the radial air classification of circulation, belongs to industrial coal powder boiler technical field.
Background technique
Currently, coal is still the main energy sources in China, accounting 75% or so in non-renewable energy utilization rate.Coal money The promotion of source service efficiency is of great significance to China environmental protection.Small and medium-sized industrial coal powder boilers are China except station boiler Outer most important one of coal equipment, compares chain furnace, combustion system, the coal dust of milled are fired in the room that industrial coal powder boiler uses Grain is carried along into hearth combustion, boiler thermal efficiency with higher by air.China's industrial coal powder boiler sum about 600,000, year Coal consumption exceedes 600,000,000 tons of mark coals.The generally existing low efficiency of the small and medium-sized industrial coal powder boilers in China at present, pollutant emission are serious etc. Problem.According to statistics, the actual operating efficiency of the middle-size and small-size coal-burned industrial boiler in China is 60%-65%, lower than international most advanced level 20%-30%, so the rebuilding and improving to small and medium-sized industrial coal powder boilers is extremely urgent.
For the research of industrial coal powder boiler, the developed country based on Germany forms in past more than 30 years Dr.Schoppe, HM, Pillard and Saacke etc. different technology schools.Bundle gram CONOx-UCC burner therein, which uses, to be divided Section air-supply multistage combustion technology, by being respectively arranged one layer of swirl secondary air direct current annular First air is inside and outside, in precombustion chamber four Be circular layout in week multiple direct currents wind snout three times, realizes the burning of air radial grading.
The coal burner for some flue gas recirculations that China uses on industrial furnace at present, such as patent of invention are " a kind of Air classification/part oxygen-enriched combusting station boiler NOx control system " (China Patent No. CN201621292096.4, authorization are public Accuse day be August in 2017 29, application publication number CN206449681U, call " file one " in the following text) using vertical air classification Method, side arranges burnout degree on the burner.Patent of invention is " using the center feeding rotational flow coal dust of separation Secondary Air bilayer jet stream Burner " (China Patent No. CN201710861235.3, data of publication of application are September in 2017 21, application publication number is CN107477572A calls " file two " in the following text) primary air piping, inner second air pipe, outer second air pipe is coaxially arranged, separate Secondary Air The double-deck circumferentially disposed round and turbulent burner where vortex burner periphery, every layer of separation secondary air channel export center of pipe It is coaxially arranged.
However, because industrial coal powder boiler burner and technology it is incomplete, so that it is still remained NOx emission High, the problems such as burner hearth easy slagging and unburned combustible in fly ash is high.In order to solve the outstanding day by day environmental problem in China and reach Gradually harsh environmental protection standard, it is necessary to coal-burned industrial boiler reasonably be improved, burning produced pollution object is reduced Discharge amount.
In conclusion there are NO for existing coal powder boiler combustion devicexThe problem of discharge amount height and burner hearth easy slagging.
Summary of the invention
The purpose of the present invention is to solve existing coal powder boiler combustion device, there are NOxDischarge amount height and burner hearth are easily tied The problem of slag, and then a kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified is provided.
The technical scheme is that a kind of spiral-flow powdered coal burning that the radial air using flue gas recirculation is classified fills It sets, it includes combustion system and flue gas recirculation system;Flue gas recirculation system is connect with combustion system, and combustion system is mounted on On boiler, flue gas recirculation system introduces the flue gas of boiler tail in combustion system separation secondary air ducts at different levels, and passes through Valve regulated flue gas introduction volume;Flue gas recirculation system includes recirculation blower, flue gas recycled pipeline, multiple flue gas recycleds Each air of pipeline valve, multiple separation secondary air duct valves and multiple flue gas recycled branch pipe(tube)s, combustion system enters Conduit upper is equipped with a separation secondary air duct valve, each air enter pipeline by flue gas recycled branch pipe(tube) and The connection of flue gas recycled pipeline, each flue gas recycled branch pipe(tube) are equipped with a flue gas recycled pipeline valve, recycle cigarette The arrival end of feed channel is connect with recirculation blower.
Further, combustion system includes that vortex burner, multiple separation overfire air ports and multiple separation are secondary Wind cyclone, vortex burner are mounted on boiler, and multiple separation overfire air port bilayers are circular layout in rotational flow coal dust The surrounding of burner, and circle where every layer of separation overfire air port export center is coaxially arranged with vortex burner, each It separates the caliber of separation secondary air channel locating for overfire air port unanimously and separates the outlet end of secondary air channel and the inner wall of burner hearth Concordantly, each air enters pipeline and is connected to wherein one layer of multiple overfire air ports that separate;In each separation overfire air port It arranges a separation Secondary Air cyclone, and separates the adjustable blade burner of Secondary Air cyclone.
Further, the boiler is horizontal boiler, and the boiler of vortex burner installation is the front wall of horizontal boiler On.
Further, the boiler of vortex burner installation is on the furnace roof of vertical boiler.
Further, vortex burner include primary air piping, it is eddy flow inner second air pipe, eddy flow outer second air pipe, outer Secondary Air swirl vane and inner second air swirl vane, primary air piping, eddy flow inner second air pipe and eddy flow outer second air pipe are by interior To sequentially coaxially arranging outside, inner second air swirl vane, installation in eddy flow outer second air pipe are installed in eddy flow inner second air pipe There is an outer second air swirl vane, the air hose spout of primary air piping, eddy flow inner second air pipe and eddy flow outer second air pipe is and burner hearth Inner wall it is concordant;From inside to outside, high concentration pulverized coal air-flow is conveyed in primary air piping, it is secondary in conveying in eddy flow inner second air pipe Wind, eddy flow outer second air pipe is interior to convey outer second air.
Further, angle is formed between the axis and inboard wall of burner hearth of multiple separation overfire air ports.
Further, the angle between the axis and inboard wall of burner hearth of multiple separation overfire air ports is α, and α is 0-45 °.
Further, the angle between the axis and inboard wall of burner hearth of multiple separation overfire air ports is α, and α is 31 ° -45 °.
The present invention has the effect that compared with prior art
1, the present invention significantly reduces NOxProduction quantity:
(1) present invention arranges multiple separation overfire air ports on the outside of burner, 60% or so sky required for burning Gas is sent into after mixing with flue gas recycled by separating overfire air port, and remaining required combustion air is by inside and outside overfire air port It is sent into, significantly strengthens the reproducibility in primary zone, the high concentration pulverized coal air-flow of primary air piping conveying is wrapped by separation Secondary Air, It burns in reducing atmosphere for a long time, the production quantity of NOx is effectively reduced.Meanwhile multiple separation secondary air channels interlock Arrangement, the cyclone arranged in separation overfire air port, which makes to separate Secondary Air, to be rotated into furnace, and it is strong to separate secondary wind disturbance, It is uniformly mixed with inner flue gas of the stove, breeze airflow is enable mildly to burn, avoided and cause NOx generation amount because local temperature is excessively high Increase.
(2) " file one " described boiler structure uses the combustion system of vertical air classification.It compares " file one ", the present invention Using radial air fractional combustion mode.Each separation overfire air port bilayer annular spread is outside vortex burner Side separates between overfire air port and eddy flow outer second air there are certain radial distance, avoids and separate the too early of Secondary Air It is mixed into, enhances the burning of air radial grading, the breeze airflow of high concentration is wrapped in centre by each separation Secondary Air, when fuel is long Between burn in the reducing atmosphere, to effectively inhibit the generation of fuel type NOx.
(3) structure used by " file two " mainly reduces fuel type NOx, compares " file two ", apparatus of the present invention are adopted With flue gas recirculation system, the flue gas recycled of introducing is the lower boiler tail flue gas of temperature, when it is injected in burner hearth, energy Average temperature level in entire burner hearth is enough reduced, to reduce the production quantity of thermal NO x.It is passed through in each separation secondary air channel Flue gas recycled, flue gas recycled mix with air, and reduce oxygen content contained by separation Secondary Air, strengthen primary zone coal Reducing atmosphere around when powder burns, advantageously reduces the production quantity of NOx.
(4) it pricks gram CONOx-UCC burner and uses level-one direct current tertiary air, classification degree is weak.Compare the burner, this hair Bright device separation overfire air port can radially wobble along burner, increase the contact surface of separation Secondary Air and inner flue gas of the stove Product, make to mix it is more uniform, thus effectively inhibit thermal NO x generation.
2, the present invention effectively avoids ash erosion:
(1) it pricks a gram CONOx-UCC burner and is sequentially arranged inner second air pipe, primary air piping and outer second air from inside to outside Pipe, breeze airflow are fed in furnace by annular primary air piping, and the inner second air of arrangement rotation, high concentration pulverized coal air-flow exist in First air It is expanded to outer second air region rapidly under the guiding role of the inner second air of rotation, the pulverized coal particle of high temperature is made to be easy to be rotated Outer second air is thrown to inboard wall of burner hearth face, causes ash erosion.Gram CONOx-UCC burner is pricked in comparison, and apparatus of the present invention are in eddy flow Coal burner peripheral circular arranges two separate Secondary Air, at the same in eddy flow outer second air again by the breeze airflow packet of high concentration It is rolled in centre, avoids the high-temperature flue gas for carrying uncombusted pulverized coal particle from contacting with furnace wall cooling, effectively prevent inboard wall of burner hearth Face slagging.
(2) it is respectively separated in " file two " and is passed directly into air in secondary air channel, asked there are primary zone ignition temperature is excessively high Topic, easily leads to ash erosion.It compares " file two ", apparatus of the present invention are passed through that temperature is lower to be followed again in each separation secondary air channel Ring flue gas, by adjusting flue gas recycled pipeline valve, control enters the flue gas recycled amount in separation overfire air port, can have Effect control fire box temperature is no more than ash fusion point, to play the role of preventing Boiler Furnace slagging.Meanwhile each separation secondary air channel axis Separation Secondary Air can be made to be formed about strong disturbance in water-cooling wall, purge inboard wall of burner hearth with burner hearth center line at an angle, Play the role of deashing, avoids because of slagging caused by fouling of heating surface is excessive.
3, the present invention is conducive to the after-flame of coal dust:
The multiple separation overfire air ports of apparatus of the present invention interlaced arrangement on the outside of burner, the interior arrangement of separation overfire air port Cyclone make separate Secondary Air rotate into furnace, the separation Secondary Air of eddy flow is uniformly mixed with the flue gas in burner hearth, favorably In the after-flame of coal dust.
Detailed description of the invention
Combustion system layout drawing Fig. 1 of the invention when being the horizontal arrangement of burner hearth.
Fig. 2 is direction view of the Fig. 1 at A.
Combustion system layout drawing Fig. 3 of the invention when being burner hearth vertical.
Fig. 4 is the schematic diagram that each separation secondary air channel is adjusted to the state of axis and inboard wall of burner hearth out of plumb arrangement.
Specific embodiment
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1 to Fig. 4, a kind of of present embodiment uses flue gas again Circulation radial air classification swirling pulverized coal combustion device, it includes combustion system, it is characterised in that: it further include flue gas again The circulatory system;Flue gas recirculation system is connect with combustion system, and combustion system is mounted on boiler, and flue gas recirculation system is by pot The flue gas of furnace tail portion introduces in combustion system separation secondary air ducts at different levels, and passes through valve regulated flue gas introduction volume;
Flue gas recirculation system includes recirculation blower 7, flue gas recycled pipeline 8, multiple flue gas recycled pipeline valves 9, multiple separation secondary air duct valves 10 and multiple flue gas recycled branch pipe(tube)s 11, each air of combustion system enter pipeline 12 tops are equipped with a separation secondary air duct valve 10, and each air enters pipeline 12 and passes through a flue gas recycled branch pipe(tube) 11 connect with flue gas recycled pipeline 8, and each flue gas recycled branch pipe(tube) 11 is equipped with a flue gas recycled pipeline valve 9, The arrival end of flue gas recycled pipeline 8 is connect with recirculation blower 7.
Specific embodiment 2: illustrating that present embodiment, the combustion system of present embodiment include rotation in conjunction with Fig. 1 to Fig. 4 Flow coal-powder combustor 1, multiple separation overfire air ports 2 and multiple separation Secondary Air cyclones 3, vortex burner 1 are installed On boiler, multiple separation 2 bilayers of overfire air port are circular layout in the surrounding of vortex burner 1, and every layer of separation two Circle is coaxially arranged with vortex burner 1 where secondary 2 export center of wind snout, divides locating for each separation overfire air port 2 Consistent from the caliber of secondary air channel and separation secondary air channel outlet end is concordant with the inner wall of burner hearth 4, and each air enters pipeline 12 are connected to wherein one layer of multiple overfire air ports 2 that separate;A separation Secondary Air is arranged in each separation overfire air port 2 Cyclone 3, and separate the adjustable blade burner of Secondary Air cyclone 3.So set, 60% or so air required for burning It is sent into after flue gas recycled mixing by separating overfire air port, remaining required combustion air is sent by inside and outside overfire air port Enter, significantly strengthens the reproducibility in primary zone, the high concentration pulverized coal air-flow of primary air piping conveying is wrapped by separation Secondary Air, long Time burns in reducing atmosphere, and the production quantity of NOx is effectively reduced.Meanwhile multiple separation secondary air channels interlock cloth It sets, the cyclone arranged in separation overfire air port, which makes to separate Secondary Air, to be rotated into furnace, and it is strong to separate secondary wind disturbance, with Inner flue gas of the stove is uniformly mixed, and so that breeze airflow is mildly burnt, is avoided and cause NOx generation amount to increase because local temperature is excessively high Add.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: illustrating present embodiment in conjunction with Fig. 1, Fig. 2 and Fig. 4, the boiler of present embodiment is horizontal Boiler, the boiler that vortex burner 1 is installed are on the front wall 5 of horizontal boiler.So set, applied widely.Other groups At and connection relationship it is the same as one or two specific embodiments.
Specific embodiment 4: embodiment is described with reference to Fig. 3, the vortex burner 1 of present embodiment is installed Boiler be vertical boiler furnace roof 6 on.So set, applied widely.Other compositions and connection relationship and specific embodiment party Formula one, 2 is three identical.
Specific embodiment 5: illustrating present embodiment, the vortex burner 1 of present embodiment in conjunction with Fig. 1 to Fig. 4 Including primary air piping 1-1, eddy flow inner second air pipe 1-2, eddy flow outer second air pipe 1-3, outer second air swirl vane 1-4 and interior two Secondary wind swirl vane 1-5, primary air piping 1-1, eddy flow inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 are from the inside to the outside successively It is coaxially arranged, inner second air swirl vane 1-5, installation in eddy flow outer second air pipe 1-3 are installed in eddy flow inner second air pipe 1-2 There are outer second air swirl vane 1-4, the air hose of primary air piping 1-1, eddy flow inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 Spout is concordant with the inner wall of burner hearth 4;From inside to outside, high concentration pulverized coal air-flow, eddy flow inner second air are conveyed in primary air piping 1-1 Inner second air is conveyed in pipe 1-2, conveys outer second air in eddy flow outer second air pipe 1-3.So set, vortex burner is all The two separate Secondary Air that is circular layout is enclosed, while the breeze airflow of high concentration is wrapped in centre again by outer second air in eddy flow, is kept away The high-temperature flue gas for exempting to carry uncombusted pulverized coal particle is contacted with furnace wall cooling, effectively prevent the slagging of inboard wall of burner hearth face.It is other Composition and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: embodiment is described with reference to Fig. 4, the multiple separation overfire air ports 2 of present embodiment Angle is formed between 4 inner wall of axis and burner hearth.So set, so that separation Secondary Air is formed rotating jet enters burner hearth (4), pass through The wind rate and angle for adjusting two separate wind, substantially increase the coal and load adaptability of burner, even if in coal and bearing When lotus changes, high efficiency boiler low NOx combustion also can guarantee.Other compositions and connection relationship and specific embodiment one, two, Three, four or five is identical.
Specific embodiment 7: embodiment is described with reference to Fig. 4, multiple separation overfire air ports 2 of present embodiment 4 inner wall of axis and burner hearth between angle be α, α is 0-45 °.So set, making to separate Secondary Air formation rotating jet entrance Burner hearth (4) substantially increases the coal and load adaptability of burner, i.e., by adjusting the wind rate and angle of two separate wind Make also to can guarantee high efficiency boiler low NOx combustion when coal and load change.Other compositions and connection relationship and specific reality It is identical to apply mode one, two, three, four, five or six.
Specific embodiment 8: embodiment is described with reference to Fig. 4, multiple separation overfire air ports 2 of present embodiment 4 inner wall of axis and burner hearth between angle be α, α is 31 ° -45 °.So set, make separate Secondary Air formed rotating jet into Enter burner hearth (4), by the wind rate and angle of adjusting two separate wind, substantially increase the coal and load adaptability of burner, Even if also can guarantee high efficiency boiler low NOx combustion when coal and load change.Other compositions and connection relationship and specific Embodiment one, two, three, four, five, six or seven are identical.
Specific embodiment 9: illustrating present embodiment in conjunction with Fig. 1 to Fig. 4, present embodiment is using flue gas recirculation The coal dust firing processing method of the swirling pulverized coal combustion device of radial air classification, concrete processing procedure include the following steps: to walk Rapid one: the high concentration pulverized coal air-flow of burning in boiler, primary air piping conveying is wrapped by separation Secondary Air, for a long time in reproducibility It burns in atmosphere, the production quantity of NOx is effectively reduced.It is strong to separate secondary wind disturbance, is uniformly mixed, makes with inner flue gas of the stove Breeze airflow can mildly burn, and avoid and cause NOx generation amount to increase because local temperature is excessively high.Meanwhile two inside and outside eddy flow The breeze airflow of high concentration is wrapped in centre again by secondary wind, avoids the high-temperature flue gas for carrying uncombusted pulverized coal particle and burner hearth water Cold wall contact, effectively prevent the slagging of inboard wall of burner hearth face.Step 2: using flue gas recirculation system, and the flue gas recycled of introducing is The lower boiler tail flue gas of temperature, can reduce average temperature level in entire burner hearth, to reduce the life of thermal NO x Cheng Liang.Meanwhile fire box temperature can be effectively controlled no more than ash fusion point, so that playing prevents burner hearth in being passed through for low temperature flue gas recycled The effect of slagging.Other compositions and connection relationship are identical as any one of specific embodiment one to eight.

Claims (8)

1. a kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified, it includes combustion system, special Sign is: it further includes flue gas recirculation system;Flue gas recirculation system is connect with combustion system, and combustion system is mounted on boiler On, flue gas recirculation system introduces the flue gas of boiler tail in combustion system separation secondary air ducts at different levels, and passes through valve Adjust flue gas introduction volume;
Flue gas recirculation system includes recirculation blower (7), flue gas recycled pipeline (8), multiple flue gas recycled pipeline valves (9), multiple separation secondary air duct valves (10) and multiple flue gas recycled branch pipe(tube)s (11), each air of combustion system into Enter pipeline (12) top equipped with a separation secondary air duct valve (10), each air enters pipeline (12) and follows again by one Ring flue gas branch pipe(tube) (11) is connect with flue gas recycled pipeline (8), and each flue gas recycled branch pipe(tube) (11) is equipped with one again The arrival end of circulating flue gas pipeline valve (9), flue gas recycled pipeline (8) is connect with recirculation blower (7).
2. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 1 is classified, It is characterized by: combustion system includes that vortex burner (1), multiple separation overfire air ports (2) and multiple separation are secondary Wind cyclone (3), vortex burner (1) are mounted on boiler, and multiple separation overfire air port (2) bilayers are circular layout The surrounding of vortex burner (1), and round and vortex burner where every layer of separation overfire air port (2) export center (1) coaxially arranged, the caliber of separation secondary air channel is consistent locating for each separation overfire air port (2) and separates secondary air channel Outlet end is concordant with the inner wall of burner hearth (4), and each air enters pipeline (12) and separates overfire air port with wherein one layer multiple (2) it is connected to;A separation Secondary Air cyclone (3) is arranged in each separation overfire air port (2), and separates Secondary Air cyclone (3) adjustable blade burner.
3. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 2 is classified, It is characterized by: the boiler is horizontal boiler, the boiler of vortex burner (1) installation is the front wall (5) of horizontal boiler On.
4. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 2 is classified, It is characterized by: the boiler of vortex burner (1) installation is on the furnace roof (6) of vertical boiler.
5. the spiral-flow powdered coal burning that a kind of radial air using flue gas recirculation according to claim 3 or 4 is classified fills It sets, it is characterised in that: vortex burner (1) includes primary air piping (1-1), eddy flow inner second air pipe (1-2), eddy flow outer two Secondary air hose (1-3), outer second air swirl vane (1-4) and inner second air swirl vane (1-5), in primary air piping (1-1), eddy flow Secondary air channel (1-2) and eddy flow outer second air pipe (1-3) are sequentially coaxially arranged from the inside to the outside, in eddy flow inner second air pipe (1-2) It is equipped with inner second air swirl vane (1-5), outer second air swirl vane (1-4) is installed in eddy flow outer second air pipe (1-3), The air hose spout of primary air piping (1-1), eddy flow inner second air pipe (1-2) and eddy flow outer second air pipe (1-3) with burner hearth (4) Inner wall is concordant;From inside to outside, high concentration pulverized coal air-flow, conveying in eddy flow inner second air pipe (1-2) are conveyed in primary air piping (1-1) Inner second air, eddy flow outer second air pipe (1-3) is interior to convey outer second air.
6. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 5 is classified, It is characterized by: forming angle between the axis and burner hearth (4) inner wall of multiple separation overfire air port (2).
7. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 6 is classified, It is characterized by: the angle between the axis and burner hearth (4) inner wall of multiple separation overfire air port (2) is α, α is 0-45 °.
8. the swirling pulverized coal combustion device that a kind of radial air using flue gas recirculation according to claim 7 is classified, It is characterized by: the angle between the axis and burner hearth (4) inner wall of multiple separation overfire air port (2) is α, α is 31 ° -45 °.
CN201811548348.9A 2018-12-18 2018-12-18 A kind of swirling pulverized coal combustion device that the radial air using flue gas recirculation is classified CN109631024A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180368A (en) * 2014-08-26 2014-12-03 山西蓝天环保设备有限公司 Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN204165045U (en) * 2014-08-26 2015-02-18 山西蓝天环保设备有限公司 Warm flue gas recirculation coal powder burner in one
CN105864750A (en) * 2016-04-19 2016-08-17 上海理工大学 Rotational-flow low-nitrogen combustor for combined combustion of chain boiler
CN107477572A (en) * 2017-09-21 2017-12-15 哈尔滨工业大学 Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet
CN107606606A (en) * 2017-09-21 2018-01-19 哈尔滨工业大学 Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180368A (en) * 2014-08-26 2014-12-03 山西蓝天环保设备有限公司 Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN204165045U (en) * 2014-08-26 2015-02-18 山西蓝天环保设备有限公司 Warm flue gas recirculation coal powder burner in one
CN105864750A (en) * 2016-04-19 2016-08-17 上海理工大学 Rotational-flow low-nitrogen combustor for combined combustion of chain boiler
CN107477572A (en) * 2017-09-21 2017-12-15 哈尔滨工业大学 Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet
CN107606606A (en) * 2017-09-21 2018-01-19 哈尔滨工业大学 Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation

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Application publication date: 20190416