CN107559819A - A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler - Google Patents
A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler Download PDFInfo
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- CN107559819A CN107559819A CN201710861185.9A CN201710861185A CN107559819A CN 107559819 A CN107559819 A CN 107559819A CN 201710861185 A CN201710861185 A CN 201710861185A CN 107559819 A CN107559819 A CN 107559819A
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- precombustion chamber
- eddy flow
- spiral
- gradually expanded
- expanded form
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Abstract
A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler, the present invention relates to a kind of spiral-flow powdered coal burning mechanism, the present invention is limited to solve the mediumand smallscale industrial boilers of coal dust burning in the prior art by size of burner hearth and combustion system, and NOx discharge is high, the problem of precombustion chamber easy slagging, it includes vortex burner and precombustion chamber, the madial wall of precombustion chamber is set by arrival end to the port of export in gradually expanded form, the port of export of vortex burner and the arrival end of precombustion chamber connect, and the port of export of vortex burner is concordant with the entrance of precombustion chamber is correspondingly arranged, the industrial field of boilers of the present invention.
Description
Technical field
The present invention relates to a kind of Industrial Boiler coal dust firing mechanism, and in particular to one kind carries gradually expanded form for Industrial Boiler
The spiral-flow powdered coal burning mechanism of precombustion chamber.
Background technology
In China, coal-burned industrial boiler is that main in addition to station boiler is equipped with coal, and close to 600,000, year disappears sum
Consume nearly 6.4 hundred million tons of coal.In recent years, as coal dust processes, transports and the development of storing technology, and pulverized coal combustion
Constantly ripe, the mediumand smallscale industrial boilers of coal dust burning are continued to develop.But limited by size of burner hearth and combustion system
The problems such as NOx discharge is high, precombustion chamber easy slagging be present in system, existing small and medium-sized industrial coal powder boilers.With Environmental Protection in China problem
It is increasingly serious, if not taking effective solution to industrial coal powder boiler Problems Existing, it may be difficult to meet it is increasingly harsh
Environmental protection standard.
The coal powder burner with precombustion chamber used at present in China, such as utility model patent《A kind of Anti-slagging
Colm pre-combustion chamber burner》(China Patent No. ZL201320145975.4, authorized announcement date be on March 26th, 2014,
Application publication number is CN203501168U, call in the following text " file one "), precombustion chamber barrel is divided into four sections, first paragraph is flaring type,
Three sections are straight barrel type afterwards, and Secondary Air sprays into for three sections from the gap between barrel point, preceding two sections of adherent penetratings, the 3rd section of oblique spray
Enter.Utility model patent《A kind of burner of the coal powder pre-burning room with expanding section》(China Patent No. is
ZL201320724053.9, authorized announcement date are September in 2014 24, application publication number CN203848280U, call " text in the following text
Part two "), precombustion chamber body is divided into entrance point and the port of export, the entrance point of the precombustion chamber body is cylindrical and for pacifying
Main burner is filled, the port of export of the precombustion chamber body is in flaring type." after the precombustion chamber that file one " proposes uses leading portion flaring
The form of section straight tube；" precombustion chamber that file two " proposes uses the form of leading portion straight tube back segment flaring.
The content of the invention
The present invention is in order to solve the mediumand smallscale industrial boilers of coal dust burning in the prior art by size of burner hearth and burning side
The limitation of formula, and the problem of NOx discharge is high, precombustion chamber easy slagging, and then one kind is provided and carries flaring for Industrial Boiler
The spiral-flow powdered coal burning mechanism of shape precombustion chamber.
It is of the invention to be for the technical scheme used that solves the above problems：
It includes vortex burner and precombustion chamber, and the madial wall of precombustion chamber is set by arrival end to the port of export in gradually expanded form
Put, the port of export of vortex burner and the arrival end of precombustion chamber connect, and the port of export and pre-burning of vortex burner
The entrance of room is concordantly correspondingly arranged.
The beneficial effects of the invention are as follows：
(1) present invention advantageously reduces NOx generation amount
1. " burner of file two " uses the precombustion chamber of leading portion straight tube back segment flaring form, and the straight tube of front end limits
The abundant development of air-flow, is unfavorable for the formation of recirculating zone.With contrast, " apparatus of the present invention use gradual-enlargement type pre-burning compared with file two "
Room, be advantageous to the formation of Central backflow area, high concentration pulverized coal is sprayed into the high temperature of hypoxemia strong reducing property atmosphere by burner centre
Central backflow area, coal dust burn in the atmosphere of fuel-rich hypoxemia for a long time, are advantageous to suppress NOx formation.
2. " burner of file one " uses the precombustion chamber of leading portion flaring back segment straight tube form, and the direct tube section of rear end is unfavorable
In the abundant development of air-flow.With contrast, " precombustion chamber of apparatus of the present invention is flaring compared with file one ", is advantageous to swirling eddy
Development, postpone the mixing of inside and outside Secondary Air, enhance the Researched of Air Staging Combustion Burning Pulverized Coal degree of burner, and postpone Secondary Air with
The mixing of breeze airflow, advantageously reduce fuel type NOx generation.Meanwhile center time is advantageous to using the precombustion chamber of flaring type
The formation in area is flowed, the Central backflow area being stabilized makes coal dust be in reducing atmosphere for a long time, is advantageous to suppress NOx shape
Into.
(2) present invention is advantageous to avoid slagging in precombustion chamber
1. " burner of file one " uses the precombustion chamber of leading portion flaring back segment straight tube form, and the direct tube section of rear end is unfavorable
In air-flow ash, slag are taken out of precombustion chamber, it is necessary to solve the problems, such as dust stratification and slagging in precombustion chamber using other measures.With it is right
Than " file one ", can be effectively by wall under the drive of rotating jet compared to all flarings of precombustion chamber of apparatus of the present invention
The ash blowout precombustion chamber in face.Meanwhile the precombustion chamber length of apparatus of the present invention is only set to the 0.8~2 of eddy flow outer second air pipe external diameter
Times, precombustion chamber length is short, is advantageous to coal dust flue gas stream in precombustion chamber and blows out precombustion chamber, avoids slagging in precombustion chamber.
2. particle is concentrated on burner centre and sprayed into by apparatus of the present invention, coal dust is prevented to be thrown to pre-burning locular wall by Secondary Air
On, so as to effectively avoid the generation of precombustion chamber slagging and high temperature corrosion.
(3) present invention be advantageous to coal dust catch fire and stable burning
1. even apparatus of the present invention set precombustion chamber also maintain breeze airflow in underload or ature of coal variation
Stable ignition and burning.Meanwhile the precombustion chamber of apparatus of the present invention is flaring, is advantageous to the formation of Central backflow area, center
Recirculating zone volume inhale stove in high-temperature flue gas heating breeze airflow, the Central backflow area being stabilized ensure that coal dust catch fire and
Stable burning.
2. apparatus of the present invention are fed high concentration pulverized coal air-flow by burner centre so that the coal dust sprayed into stove all collects
In in high temperature center recirculating zone, high temperature, area with high mercury are formed in Central backflow area, coal dust is extended and stops in high-temperature region
Stay the time, enhance breeze airflow catch fire and combustion stability, enable boiler compared with being run under underload, combustion stability
Also can be fully guaranteed.
Brief description of the drawings
Fig. 1 is the schematic diagram that apparatus of the present invention are arranged in horizontal boiler front wall 3, and central backflow region 5 is located at precombustion chamber 2
Porch.
Fig. 2 is the schematic diagram that apparatus of the present invention are arranged in vertical boiler furnace roof 4, and central backflow region 5 is located at precombustion chamber 2
Porch.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1-Fig. 2, one kind described in present embodiment is used for industrial pot
There is the spiral-flow powdered coal burning mechanism of gradually expanded form precombustion chamber in furnace zone, and it includes vortex burner 1 and precombustion chamber 2, precombustion chamber 2
Madial wall set by arrival end to the port of export in gradually expanded form, the port of export of vortex burner 1 and the entrance of precombustion chamber 2
End connection, and the port of export of vortex burner 1 is concordant with the entrance of precombustion chamber 2 is correspondingly arranged.
Embodiment two：Illustrate present embodiment with reference to Fig. 1-Fig. 2, one kind described in present embodiment is used for industrial pot
There is the spiral-flow powdered coal burning mechanism of gradually expanded form precombustion chamber in furnace zone, and vortex burner 1 includes in primary air piping 1-1, eddy flow two
Secondary airduct 1-2, eddy flow outer second air pipe 1-3, the first axial swirl blades 1-4 and the second axial swirl blades 1-5；Outside eddy flow
Secondary air channel 1-3 and eddy flow inner second air pipe 1-2 ecto-entads are sequentially sleeved on primary air piping 1-1, and primary air piping 1-1,
Eddy flow inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 are coaxially disposed, and the first axial swirl blades 1-4 is arranged on First air
Between pipe 1-1 and eddy flow inner second air pipe 1-2, the second axial swirl blades 1-5 is arranged on eddy flow inner second air pipe 1-2 and rotation
It is other identical with embodiment one between flowing outer second air pipe 1-3.
Breeze airflow sprays via the primary air piping 1-1 at the center of vortex burner 1, and Secondary Air air-flow is in axial rotational flow
Rotating jet is formed in the presence of blade and enters precombustion chamber 2, rotating jet is formed centrally recirculating zone in the gas flow, and volume is inhaled high in stove
Warm flue gas and firing coal-dust airflow.
Embodiment three：Illustrate present embodiment with reference to Fig. 1-Fig. 2, one kind described in present embodiment is used for industrial pot
There is the spiral-flow powdered coal burning mechanism of gradually expanded form precombustion chamber in furnace zone, and arrival end to the port of export of precombustion chamber 2 has extended corner, extension
The angle at angle is α, and α span is 0-10.It is other identical with embodiment one.
Embodiment four：Illustrate present embodiment with reference to Fig. 1-Fig. 2, one kind described in present embodiment is used for industrial pot
There is the spiral-flow powdered coal burning mechanism of gradually expanded form precombustion chamber in furnace zone, and precombustion chamber 2 forms pre-burning by the refractory material casting of high intensity
Room.It is other identical with embodiment one.
Embodiment five：Illustrate present embodiment with reference to Fig. 1-Fig. 2, one kind described in present embodiment is used for industrial pot
There are the spiral-flow powdered coal burning mechanism of gradually expanded form precombustion chamber, a diameter of eddy flow outer second air pipe 1-3 of the arrival end of precombustion chamber 2 in furnace zone
1.5 times to 3 times of external diameter, the length of precombustion chamber 2 are 0.8 times to 2 times of eddy flow outer second air pipe 1-3 external diameters.It is other with it is specific
Embodiment one, two, three or four are identical.
Claims (5)
- A kind of 1. spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler, it is characterised in that：It includes rotation Flow coal-powder combustor (1) and precombustion chamber (2), the madial wall of precombustion chamber (2) are set by arrival end to the port of export in gradually expanded form, eddy flow The port of export of coal burner (1) is connected with the arrival end of precombustion chamber (2), and the port of export of vortex burner (1) with it is pre- The entrance of combustion room (2) is concordantly correspondingly arranged.
- 2. a kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler according to claim 1, its It is characterised by：Vortex burner (1) includes primary air piping (1-1), eddy flow inner second air pipe (1-2), eddy flow outer second air Manage (1-3), the first axial swirl blades (1-4) and the second axial swirl blades (1-5)；Eddy flow outer second air pipe (1-3) and rotation Stream inner second air pipe (1-2) ecto-entad is sequentially sleeved on primary air piping (1-1), and secondary in primary air piping (1-1), eddy flow Airduct (1-2) and eddy flow outer second air pipe (1-3) are coaxially disposed, and the first axial swirl blades (1-4) are arranged on primary air piping (1- 1) between eddy flow inner second air pipe (1-2), the second axial swirl blades (1-5) be arranged on eddy flow inner second air pipe (1-2) and Between eddy flow outer second air pipe (1-3).
- 3. a kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler according to claim 1, its It is characterised by：Arrival end to the port of export of precombustion chamber (2) has extended corner, and the angle of extended corner is α, and α span is 0- 10°。
- 4. a kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler according to claim 1, its It is characterised by：Precombustion chamber (2) forms precombustion chamber by the refractory material casting of high intensity.
- 5. according to a kind of spiral-flow powdered coal burning that gradually expanded form precombustion chamber is carried for Industrial Boiler of claim 1,2,3 or 4 Mechanism, it is characterised in that：1.5 times to 3 times of a diameter of eddy flow outer second air pipe (1-3) external diameter of precombustion chamber (2) arrival end, in advance The length for firing room (2) is 0.8 times to 2 times of eddy flow outer second air pipe (1-3) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861185.9A CN107559819A (en) | 2017-09-21 | 2017-09-21 | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861185.9A CN107559819A (en) | 2017-09-21 | 2017-09-21 | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler |
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| CN107559819A true CN107559819A (en) | 2018-01-09 |
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|---|---|---|---|
| CN201710861185.9A Pending CN107559819A (en) | 2017-09-21 | 2017-09-21 | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631018A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler |
| CN109631025A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of Anti-slagging swirling pulverized coal combustion device suitable for industrial coal powder boiler |
| CN109631023A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | There is the cyclone burner of precombustion chamber using the multiple radial grading of flue gas recirculation |
| CN112902150A (en) * | 2021-02-07 | 2021-06-04 | 哈尔滨工业大学 | Combustion system and method for boiler on front wall or rear wall of power station |
| CN112902149A (en) * | 2021-02-07 | 2021-06-04 | 哈尔滨工业大学 | Combustion system with pre-combustion chamber burners arranged on walls on two sides of boiler and combustion method |
| CN113007698A (en) * | 2021-02-07 | 2021-06-22 | 哈尔滨工业大学 | Combustion system for lower layer of opposed combustion boiler and use method |
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| DE3310500A1 (en) * | 1983-03-23 | 1984-10-04 | Steag Ag, 4300 Essen | Burner for the combustion of pulverized fuels and process for the operation of a fuel dust burner flame |
| US4523530A (en) * | 1982-02-26 | 1985-06-18 | Sumitomo Metal Industries, Ltd. | Powdery coal burner |
| US4690075A (en) * | 1984-08-16 | 1987-09-01 | Stein Industrie | Ignition and combustion supporting burner for pulverized solid fossil fuel and combustion chamber comprising same |
| CN102353049A (en) * | 2011-08-10 | 2012-02-15 | 深圳东方锅炉控制有限公司 | Stable combustion device for pulverized coal ignition |
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2017
- 2017-09-21 CN CN201710861185.9A patent/CN107559819A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4523530A (en) * | 1982-02-26 | 1985-06-18 | Sumitomo Metal Industries, Ltd. | Powdery coal burner |
| DE3310500A1 (en) * | 1983-03-23 | 1984-10-04 | Steag Ag, 4300 Essen | Burner for the combustion of pulverized fuels and process for the operation of a fuel dust burner flame |
| US4690075A (en) * | 1984-08-16 | 1987-09-01 | Stein Industrie | Ignition and combustion supporting burner for pulverized solid fossil fuel and combustion chamber comprising same |
| CN102353049A (en) * | 2011-08-10 | 2012-02-15 | 深圳东方锅炉控制有限公司 | Stable combustion device for pulverized coal ignition |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631018A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler |
| CN109631025A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | A kind of Anti-slagging swirling pulverized coal combustion device suitable for industrial coal powder boiler |
| CN109631023A (en) * | 2018-12-18 | 2019-04-16 | 哈尔滨工业大学 | There is the cyclone burner of precombustion chamber using the multiple radial grading of flue gas recirculation |
| CN112902150A (en) * | 2021-02-07 | 2021-06-04 | 哈尔滨工业大学 | Combustion system and method for boiler on front wall or rear wall of power station |
| CN112902149A (en) * | 2021-02-07 | 2021-06-04 | 哈尔滨工业大学 | Combustion system with pre-combustion chamber burners arranged on walls on two sides of boiler and combustion method |
| CN113007698A (en) * | 2021-02-07 | 2021-06-22 | 哈尔滨工业大学 | Combustion system for lower layer of opposed combustion boiler and use method |
| CN113007698B (en) * | 2021-02-07 | 2021-12-03 | 哈尔滨工业大学 | Combustion system for lower layer of opposed combustion boiler and use method |
| CN112902149B (en) * | 2021-02-07 | 2022-02-22 | 哈尔滨工业大学 | Combustion method of combustor with precombustion chambers arranged on two side walls of boiler |
| CN112902150B (en) * | 2021-02-07 | 2022-02-22 | 哈尔滨工业大学 | Combustion system and method for boiler on front wall or rear wall of power station |
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Application publication date: 20180109 |
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