CN109631018A - A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler - Google Patents
A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler Download PDFInfo
- Publication number
- CN109631018A CN109631018A CN201811548346.XA CN201811548346A CN109631018A CN 109631018 A CN109631018 A CN 109631018A CN 201811548346 A CN201811548346 A CN 201811548346A CN 109631018 A CN109631018 A CN 109631018A
- Authority
- CN
- China
- Prior art keywords
- air duct
- flue gas
- burner
- combustion chamber
- precombustion chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 239000000843 powder Substances 0.000 title abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003546 flue gas Substances 0.000 claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 239000011819 refractory material Substances 0.000 claims description 2
- 230000003134 recirculating effect Effects 0.000 claims 8
- 230000000750 progressive effect Effects 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 9
- 238000013517 stratification Methods 0.000 description 9
- 239000002956 ash Substances 0.000 description 8
- 239000002817 coal dust Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler, it is related to boiler technology field, to solve the problems, such as that small and medium-sized industrial coal powder boilers slagging is serious under the prior art.The present invention includes that primary air piping, inner second air pipe, outer second air pipe, inward eddy burner, contour stealth burner, precombustion chamber, flue gas recycled pipeline valve, recycling high pressure blower, supervisor, multiple flue gas recycled jet pipes and multiple are in charge of；Primary air piping, inner second air pipe and outer second air pipe are successively set in together with one heart from inside to outside, and it is adjacent between the two with gap formation air duct, primary air piping, inner second air pipe and the respective air outlet of outer second air pipe are connected to the entrance of precombustion chamber respectively, primary air piping, inner second air pipe and the respective axis of outer second air pipe are vertical with the end face of pre-burning chamber inlet, the outlet of precombustion chamber is connected to the burner hearth of boiler, and precombustion chamber is the big conically shaped in the small outlet of entrance.The present invention is suitable for industrial coal powder boiler.
Description
Technical field
The present invention relates to boiler technology fields, and in particular to a kind of gradual-enlargement type Anti-slagging burning for industrial coal powder boiler
Device.
Background technique
Industrial Boiler plays the role of essential in China's economic development and resident living, and coal-burned industrial boiler is
Main in addition to station boiler is equipped with coal.In recent years, with coal dust processing, transport and the development of storing technology, Yi Jimei
The continuous maturation of powder combustion technology, the mediumand smallscale industrial boilers of coal dust burning are continued to develop, by the development of more than ten years, coal
Powder Industrial Boiler industry has preliminarily formed.In China, for coal-burned industrial boiler sum close to 600,000, year consumes coal nearly 6.4 hundred million
Ton.Precombustion chamber is the important component of Industrial Boiler, and fuel supply device injects fuel into precombustion chamber, and fuel is filled through igniting
It sets and furnace chamber inner combustion is blown by Secondary Air after lighting, precombustion chamber plays the role of lighting fuel and organizes burning.Breeze airflow into
After entering precombustion chamber, high temperature recirculation zone is formed under the action of turbulent burner, guarantees that breeze airflow stablizes burning.Due to precombustion chamber
The case where interior temperature is high, and space is small, is easy to appear slagging and dust stratification, especially when using the lower colm of ash fusion point, in advance
It is serious to fire indoor slagging.Slagging and dust stratification destroy the aerodynamic field of precombustion chamber in precombustion chamber, influence the stabilization of coal dust firing
Property, it will cause safety accident when serious, increase the maintenance workload of operations staff.Slagging is that influence precombustion chamber is normal with dust stratification
The main reason for operation.It prevents precombustion chamber dust stratification and slagging from guaranteeing that precombustion chamber is run steadily in the long term, and then guarantees industrial coal powder pot
The stable operation of furnace superintendent phase.
China has developed a variety of coal powder burners suitable for industrial coal powder boiler at present.Utility model patent " one
The colm pre-combustion chamber burner of kind of Anti-slagging " China Patent No. is ZL201320145975.4, authorized announcement date is 2014 3
Month 26 days, application publication number CN203501168U, call " file one " in the following text, precombustion chamber barrel are divided into four sections, first segment is gradually
Expansion type, latter three sections are straight barrel type, and Secondary Air sprays into for three sections from the gap between barrel point, preceding two sections of adherent penetratings, and third section is oblique
To penetrating.(China Patent No. ZL201520406222.3, authorized announcement date are utility model patent " combustion powder Industrial Boiler "
September in 2015 30 days, application publication number CN204678328U, call " file two " in the following text) input end of the precombustion chamber ontology is in
Tapered form and for installing main burner, the outlet end of the precombustion chamber ontology is in the form of flaring.
Although a variety of combustion technologies of domestic-developed, there are still the easy slagging of precombustion chamber to ask existing industrial coal powder boiler
Topic, if not can solve this problem, it may be difficult to guarantee the safe operation steady in a long-term of industrial coal powder boiler.
Summary of the invention
The present invention provides a kind of use to solve the problems, such as that small and medium-sized industrial coal powder boilers slagging is serious under the prior art
In the gradual-enlargement type Anti-slagging burner of industrial coal powder boiler.
The technical solution adopted by the present invention to solve the above technical problem is:
A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler includes primary air piping, inner second air pipe, outer two
Secondary air hose, inward eddy burner, contour stealth burner, precombustion chamber, flue gas recycled pipeline valve, recycling high pressure blower, master
Pipe, multiple flue gas recycled jet pipes and multiple are in charge of；
Primary air piping, inner second air pipe and outer second air pipe are successively set in together with one heart from inside to outside, and both adjacent
Between have gap formed air duct, primary air piping, inner second air pipe and the respective air outlet of outer second air pipe respectively with precombustion chamber
Entrance connection, primary air piping, inner second air pipe and the respective axis of outer second air pipe are vertical with the end face of pre-burning chamber inlet, in advance
The outlet of combustion room is connected to the burner hearth of boiler, and precombustion chamber is the big conically shaped in the small outlet of entrance, primary air piping and inner second air pipe
Between be equipped with inward eddy burner, between primary air piping and inner second air pipe be equipped with contour stealth burner, precombustion chamber be equipped with it is more
A flue gas recycled jet pipe, each flue gas recycled jet pipe is in charge of with each to be connected to, and is in charge of for multiple and is connected to respectively with supervisor,
It is responsible for and is connected to the air outlet of recycling high pressure blower, the branch, which is in charge of, is equipped with flue gas recycled pipeline valve, each follows again
Ring flue gas jet pipe is arranged at an angle with precombustion chamber entrance face, two neighboring to cross flue gas recycled nozzle axis and and in advance
The angle for firing the vertical plane in chamber inlet end face is equal, and the center line of precombustion chamber to each mistake flue gas recycled nozzle axis and
The plane vertical with precombustion chamber entrance face is equidistant.
Compared with the prior art, the invention has the following beneficial effects:
One, precombustion chamber of the invention is set as taper, and from the inlet to the outlet, sectional area constantly increases, Thermal load of cross-section by
A possibility that gradually reducing, effectively reducing precombustion chamber slagging.
Two, flue gas recycled of the present invention is sprayed by the flue gas recycled jet pipe on precombustion chamber entrance face with certain speed
Enter, forms one layer " air film " in pre-burning chamber interior walls, high temperature, the flue gas of high lime-ash concentration and precombustion chamber internal wall separates are opened, are kept away
Exempt from the lime-ash of high temperature and the contact of pre-burning chamber interior walls；Meanwhile flue gas recycled temperature is lower than furnace high-temperature flue gas, so that high temperature cigarette
Gas has cooled down before touching pre-burning chamber interior walls, and the lime-ash for reaching pre-burning chamber interior walls can be recycled flue gas stream band at once
It walks, reduces pre-burning chamber interior walls slagging.Therefore, flue gas recycled is avoided that coal in the case where not influencing pre-burning Indoor Combustion
Powder and ash deposition achieve the purpose that prevent precombustion chamber dust stratification and slagging in precombustion chamber wall surface.
Three, the angle in the present invention between the axis of flue gas recycled jet pipe and the vertical line of precombustion chamber entrance face can basis
Coal quality fire behaviour and the difference of boiler load are adjusted, and avoid coal dust and ash deposition in precombustion chamber wall surface, reaching prevents
The purpose of precombustion chamber dust stratification and slagging.
Four, the present invention is two neighboring crosses flue gas recycled nozzle axis and vertical with precombustion chamber entrance face two are put down
The angle in face is equal, and the center line of precombustion chamber hangs down to each flue gas recycled nozzle axis excessively and with precombustion chamber entrance face
Straight plane is equidistant, and so that flue gas recycled is formed rotating jet by flue gas recycled jet pipe, rotating jet is in pre-burning
The strong disturbance that chamber interior walls are formed purges pre-burning chamber interior walls, plays the role of deashing, reduce dust stratification in precombustion chamber, can
The ash of wall surface, slag are effectively blown out into precombustion chamber, avoided because of slagging caused by wall surface dust stratification is excessive.
Detailed description of the invention
Fig. 1 is the schematic diagram that the present invention is applied to horizontal pulverized-coal fired boiler；
Fig. 2 is left view of the invention；
Fig. 3 is the schematic diagram that the present invention is applied to vertical pulverized-coal fired boiler；
Wherein the single arrow direction in Fig. 1 and Fig. 3 is the conveying direction of First air coal dust.
Specific embodiment
Specific embodiment 1: illustrate present embodiment in conjunction with Fig. 1 and Fig. 2, present embodiment include primary air piping 1,
Inner second air pipe 2, outer second air pipe 3, inward eddy burner 4, contour stealth burner 5, precombustion chamber 6, flue gas recycled pipeline valve
Door 7, recycling high pressure blower 9, supervisor 10, multiple flue gas recycled jet pipes 8 and multiple are in charge of 12；
Primary air piping 1, inner second air pipe 2 and outer second air pipe 3 are successively set in together with one heart from inside to outside, and adjacent two
There is gap to form air duct, primary air piping 1, inner second air pipe 2 and the respective air outlet of outer second air pipe 3 are respectively and in advance between person
Fire the entrance connection of room 6, the end of primary air piping 1, inner second air pipe 2 and the respective axis of outer second air pipe 3 and 6 entrance of precombustion chamber
Face is vertical, and the outlet of precombustion chamber 6 is connected to the burner hearth 11 of boiler, and precombustion chamber 6 is the big conically shaped in the small outlet of entrance, primary air piping
It is equipped with inward eddy burner 4 between 1 and inner second air pipe 2, contour stealth is equipped between primary air piping 1 and inner second air pipe 2 and is burnt
Device 5, precombustion chamber 6 are equipped with multiple flue gas recycled jet pipes 8, and each flue gas recycled jet pipe 8 is in charge of 12 with each and is connected to, more
A branch is in charge of 12 and is connected to respectively with supervisor 10, and supervisor 10 is connected to the air outlet of recycling high pressure blower 9, and the branch is in charge of on 12
Equipped with flue gas recycled pipeline valve 7, each flue gas recycled jet pipe 8 is arranged at an angle with 6 entrance face of precombustion chamber, phase
Adjacent two are crossed 8 axis of flue gas recycled jet pipe and equal with the vertical angle of plane of 6 entrance face of precombustion chamber, and precombustion chamber
6 center line crosses 8 axis of flue gas recycled jet pipe and the phase at a distance from vertical plane with 6 entrance face of precombustion chamber to each
Deng.
The wind speed that the present invention recycles the offer of high pressure blower 9 40m/s or more can will recycle cigarette by the conversion of valve 7
Gas terminates, and the indoor lime-ash of pre-burning can effectively be cleared up by being sent into high-speed flow using recycling high pressure blower 9, plays protection precombustion chamber
6 effect.
Specific embodiment 2: illustrating present embodiment in conjunction with Fig. 1, the cone angle of precombustion chamber 6 described in present embodiment is
0-45°。
Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: illustrate present embodiment in conjunction with Fig. 1, the entrance of precombustion chamber 6 described in present embodiment
Diameter is 1.5-3 times of 3 outer diameter of outer second air pipe, and the length L1 of precombustion chamber 6 is the 0.8- of 3 outer diameter of outer second air pipe
2 times.
So set, being conducive to coal dust flue gas stream in precombustion chamber blows out precombustion chamber.
Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: illustrating present embodiment in conjunction with Fig. 1, the material of precombustion chamber 6 described in present embodiment is
High strength refractory material.
Other compositions and connection relationship are identical as specific embodiment one, two or three.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 1, flue gas recycled jet pipe 8 described in present embodiment
Axis and the angle of the 6 entrance face vertical line of precombustion chamber be 0-60 °.
Angle β between the 6 entrance face vertical line of axis and precombustion chamber of flue gas recycled jet pipe 8 is adjustable, by adjusting β
Size can realize the targeted elimination to lime-ash in precombustion chamber.
So set, avoiding coal dust and ash deposition in precombustion chamber wall surface, precombustion chamber dust stratification and slagging are prevented.
Other compositions and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: illustrate present embodiment in conjunction with Fig. 1, flue gas recycled jet pipe 8 described in present embodiment
The entrance inner wall distance of the center of outlet to the precombustion chamber 6 is 10-30mm.
So set, the rotating jet that flue gas recycled jet pipe 8 projects generates effective disturbance to inner wall.
Other compositions and connection relationship and specific embodiment one, two, three, four or five are identical.
As shown in figure 3, it is can also be applied to vertical boiler, precombustion chamber 6 of the invention in vertical pulverized-coal fired boiler
Top connection, primary air piping 1 of the invention, inner second air pipe 2 and outer second air pipe 3 be vertically arranged, other component relationships with it is upper
It is identical to state embodiment.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548346.XA CN109631018A (en) | 2018-12-18 | 2018-12-18 | A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811548346.XA CN109631018A (en) | 2018-12-18 | 2018-12-18 | A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109631018A true CN109631018A (en) | 2019-04-16 |
Family
ID=66074972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811548346.XA Pending CN109631018A (en) | 2018-12-18 | 2018-12-18 | A kind of gradual-enlargement type Anti-slagging burner for industrial coal powder boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109631018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895410A (en) * | 2020-06-29 | 2020-11-06 | 欧保(中国)环境工程股份有限公司 | Vector control gas low-nitrogen burner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0171788A1 (en) * | 1984-08-16 | 1986-02-19 | STEIN INDUSTRIE Société Anonyme dite: | Ignition and support burner for solid fossil pulverized fuel, and combustion chamber comprising such a burner |
| EP0639742A2 (en) * | 1993-08-20 | 1995-02-22 | Saacke GmbH & Co. KG | Method and device for low emission combustion of fluid and or gaseous fuels with internal recirculation of fluegas |
| CN107559819A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler |
| CN107559820A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | A kind of precombustion chamber with surrounding air suitable for vortex burner |
| 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 |
-
2018
- 2018-12-18 CN CN201811548346.XA patent/CN109631018A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0171788A1 (en) * | 1984-08-16 | 1986-02-19 | STEIN INDUSTRIE Société Anonyme dite: | Ignition and support burner for solid fossil pulverized fuel, and combustion chamber comprising such a burner |
| EP0639742A2 (en) * | 1993-08-20 | 1995-02-22 | Saacke GmbH & Co. KG | Method and device for low emission combustion of fluid and or gaseous fuels with internal recirculation of fluegas |
| CN107559819A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler |
| CN107559820A (en) * | 2017-09-21 | 2018-01-09 | 哈尔滨工业大学 | A kind of precombustion chamber with surrounding air suitable for vortex burner |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895410A (en) * | 2020-06-29 | 2020-11-06 | 欧保(中国)环境工程股份有限公司 | Vector control gas low-nitrogen burner |
| CN111895410B (en) * | 2020-06-29 | 2022-02-01 | 欧保(中国)环境工程股份有限公司 | Vector control gas low-nitrogen burner |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190416 |