CN109185872A - A kind of boiler secondary wind system - Google Patents
A kind of boiler secondary wind system Download PDFInfo
- Publication number
- CN109185872A CN109185872A CN201811210128.5A CN201811210128A CN109185872A CN 109185872 A CN109185872 A CN 109185872A CN 201811210128 A CN201811210128 A CN 201811210128A CN 109185872 A CN109185872 A CN 109185872A
- Authority
- CN
- China
- Prior art keywords
- secondary air
- burner hearth
- boiler
- air channel
- branch pipe
- 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.)
- Granted
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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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- 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
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention belongs to boiler reforming technology fields, disclose a kind of boiler secondary wind system.The boiler secondary wind system includes burner hearth and the secondary air box that connect with burner hearth, and secondary air box is connected with multiple groups secondary air channel, and every group of secondary air channel and burner hearth are corresponding with a spout, and every group of secondary air channel includes at least two Secondary Air branch pipes；In every group of secondary air channel, one end that every Secondary Air branch pipe is located at secondary air box is spaced from each other, positioned at one end of burner hearth spout connection corresponding with secondary air channel.One end that the present invention is located at secondary air box by being arranged to every Secondary Air branch pipe is spaced from each other, positioned at the mode of one end of burner hearth spout connection corresponding with secondary air channel, so that when load decline, it can be by turning down or closing a wherein Secondary Air branch pipe, flow velocity without influencing other Secondary Air branch pipes in this group of secondary air channel, to maintain the momentum that Secondary Air passes through spout, solve the problems, such as that caused Secondary Air penetrability is bad when load decline.
Description
Technical field
The present invention relates to boiler reforming technology field more particularly to a kind of boiler secondary wind systems.
Background technique
In circulating fluidized bed boiler, burner hearth is generally divided into emulsion zone, transition region and dilute according to the different of material concentration
Phase region three parts, concentration of solid particles is larger in emulsion zone, and bed pressure is relatively high, has very big thermal capacity.Boiler actual motion
When, since concentration of solid particles is bigger in emulsion zone, bed shows as higher burner hearth positive pressure, so that Secondary Air air-flow penetrates
Resistance is very big, is difficult for wind to be sent into emulsion zone, and burner hearth oxygen amount often shows the distribution trend that surrounding is high, centre is low.Convection current
For fluidized bed boiler, First air need to guarantee that boiler normally fluidizes, and there are the limitation of incipient fluidization air quantity, it is negative that Secondary Air mainly plays boiler
The effect of lotus regulation and control burner hearth oxygen amount, with the change of load, modulability is larger, when load is lower, it is also necessary to stop
Only Secondary Air is run.
In boiler operatiopn, the secondary air system of conventional design is difficult for Secondary Air to be sent into the middle part of burner hearth；Especially with negative
When lotus changes, load is lower, and the secondary air flow needed is opposite to be reduced, in the case where spout sum and constant area of injection orifice, spray
One's intention as revealed in what one says speed can reduce therewith, and overfiren air port is caused to spray power dropping, penetration capacity decline.Conventional method is adjustment spout number
Amount when load is higher, opens all overfiren air ports, random close portion air port in two times after load reduction, but overfiren air port is big
Small and quantity is mainly to be designed down at full capacity, and arrangement is mainly the uniformity and covering surface from cloth wind, the bottom of with
The cooperation of portion's First air, the arrangement correspondence of burner hearth feeder and returning charge point and distribution of burner hearth oxygen amount etc. are considered.
If directly turning off part overfire air port be easy to cause that oxygen amount is unevenly distributed in furnace or relatively large deviation occurs in temperature field.
It would therefore be highly desirable to need to provide a kind of New-type boiler secondary air system to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of boiler secondary wind system, exists to solve existing boiler secondary wind system and work as
When load declines, the bad problem of the penetrability of Secondary Air.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of boiler secondary wind system, including burner hearth and the secondary air box connecting with burner hearth, secondary air box is connected with multiple groups
Secondary air channel, every group of secondary air channel and burner hearth are corresponding with a spout, and every group of secondary air channel includes at least two Secondary Air branch
Pipe；
In every group of secondary air channel, one end that every Secondary Air branch pipe is located at secondary air box is spaced from each other, positioned at the one of burner hearth
Hold spout connection corresponding with secondary air channel.
Preferably, every Secondary Air branch pipe is equipped with damper close to the part of secondary air box.
Preferably, damper is electric flap or manual air door.
Preferably, the whole body of burner hearth is symmetrically arranged with multiple groups secondary air channel.
Preferably, every two adjacent Secondary Air branch pipes are mutually arranged close to the part of burner hearth in every group of secondary air channel.
Preferably, every Secondary Air branch pipe is made close to the part of burner hearth of heat-resisting material.
Preferably, every Secondary Air branch pipe is to cast.
Beneficial effects of the present invention:
One end that the present invention is located at secondary air box by being arranged to every Secondary Air branch pipe is spaced from each other, positioned at the one of burner hearth
The mode of spout connection corresponding with secondary air channel is held, so that when load decline, it can be by turning down or closing wherein one
Secondary Air branch pipe, without influencing the flow velocity of other Secondary Air branch pipes in this group of secondary air channel, to maintain Secondary Air process
The momentum of spout solves the problems, such as that caused Secondary Air penetrability is bad when load decline.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of boiler secondary wind system provided by the invention；
Fig. 2 is another structural schematic diagram of boiler secondary wind system provided by the invention.
In figure:
1, burner hearth；2, secondary air box；3, secondary air channel；
31, spout；32, Secondary Air branch pipe；33, damper.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
It as depicted in figs. 1 and 2, is the structural schematic diagram of boiler secondary wind system provided by the invention.The boiler two
Secondary wind system includes burner hearth 1 and the secondary air box connecting with burner hearth 12, and secondary air box 2 is connected with multiple groups secondary air channel 3, and every group two
Secondary air hose 3 is corresponding with a spout 31 with burner hearth 1, and every group of secondary air channel 3 includes at least two Secondary Air branch pipes 32；Every group two
In secondary air hose 3, one end that every Secondary Air branch pipe 32 is located at secondary air box 2 is spaced from each other, positioned at one end of burner hearth 1 with the group
The connection of the corresponding spout 31 of secondary air channel 3.One end that the present invention is located at secondary air box 2 by being arranged to every Secondary Air branch pipe 32
It is spaced from each other, the mode that spout 31 corresponding with this group of secondary air channel 3 is connected to positioned at one end of burner hearth 1, so that when under load
It, can be by turning down or closing a wherein Secondary Air branch pipe 32, without influencing other Secondary Airs in this group of secondary air channel 3 when drop
The flow velocity of branch pipe 32, to maintain the momentum that Secondary Air passes through spout 31, caused Secondary Air is worn when solving load decline
The bad problem of permeability.
Specifically, every Secondary Air branch pipe 32 is equipped with damper 33, damper 33 close to the part of secondary air box 2
It can be electric flap and be also possible to manual air door, preferably use electric flap in present embodiment, pass through damper
33 can be adjusted the secondary air flow of every Secondary Air branch pipe 32, when load decline, by reducing wherein one or several
The flow of root Secondary Air branch pipe 32, the flow velocity without influencing other Secondary Air branch pipes 32 in this group of secondary air channel 3, to maintain
Secondary Air passes through the momentum of spout 31, plays reinforcing and penetrates benefit wind action, that is, ensure that the Secondary Air when load decline
The still good advantage of penetration performance.
Specifically, the whole body of burner hearth 1 is symmetrically arranged with multiple groups secondary air channel 3 (only showing two groups in Fig. 1 and Fig. 2), so may be used
Guarantee that the Secondary Air for entering burner hearth 1 is symmetrical and uniform, conducive to mixing coal-fired in Secondary Air and burner hearth 1.
Specifically, every Secondary Air branch pipe 32 is made close to the part of burner hearth 1 of heat-resisting material, due to closer to furnace
1 temperature of thorax is higher, for extend Secondary Air branch pipe 32 service life, preferably its be made close to the part of burner hearth 1 of heat-resisting material,
Further, also high-temperaure coating can be coated on the surface of the part.
Specifically, every Secondary Air branch pipe 32 is to cast, and is reduced by the Secondary Air branch pipe 32 that casting is formed
Cutting output belongs to no machining, low processing cost.
Specifically, Fig. 2 is referred to, the boiler secondary wind system that Fig. 2 is provided is the preferred embodiment of the present invention.Compared to figure
The 1 boiler secondary wind system provided, the difference for the secondary air system that Fig. 2 is provided are mainly reflected in: in every group of secondary air channel 3, often
Two adjacent Secondary Air branch pipes 32 are mutually arranged close to the part of burner hearth 1, are flowed out between so certifiable Secondary Air branch pipe 32
Secondary Air will not to (corresponding with identical spout 31) other Secondary Air branch pipes 32 formed resistance.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and being not is pair
The restriction of embodiments of the present invention.For the ordinary skill user of fields, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (7)
1. a kind of boiler secondary wind system, including burner hearth (1) and the secondary air box (2) connecting with the burner hearth (1), feature exists
In the secondary air box (2) is connected with multiple groups secondary air channel (3), and secondary air channel described in every group (3) is corresponding with the burner hearth (1)
There is a spout (31), secondary air channel described in every group (3) includes at least two Secondary Air branch pipes (32)；
In secondary air channel described in every group (3), one end that the every Secondary Air branch pipe (32) is located at the secondary air box (2) is mutual
It separates, is located at one end spout (31) connection corresponding with the secondary air channel (3) of the burner hearth (1).
2. boiler secondary wind system according to claim 1, which is characterized in that the every Secondary Air branch pipe (32) is close
The part of the secondary air box (2) is equipped with damper (33).
3. boiler secondary wind system according to claim 2, which is characterized in that the damper (33) is electric flap
Or manual air door.
4. boiler secondary wind system according to claim 1, which is characterized in that the whole body of the burner hearth (1) is symmetrically arranged with
Secondary air channel described in multiple groups (3).
5. boiler secondary wind system according to claim 1, which is characterized in that in secondary air channel described in every group (3), every two
The adjacent Secondary Air branch pipe (32) of root is mutually arranged close to the part of the burner hearth (1).
6. boiler secondary wind system according to claim 5, which is characterized in that the every Secondary Air branch pipe (32) is close
The part of the burner hearth (1) is made of heat-resisting material.
7. boiler secondary wind system according to claim 1 to 6, which is characterized in that the every Secondary Air branch
Managing (32) is to cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210128.5A CN109185872B (en) | 2018-10-17 | 2018-10-17 | Secondary air system of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210128.5A CN109185872B (en) | 2018-10-17 | 2018-10-17 | Secondary air system of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109185872A true CN109185872A (en) | 2019-01-11 |
| CN109185872B CN109185872B (en) | 2023-09-19 |
Family
ID=64945150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811210128.5A Active CN109185872B (en) | 2018-10-17 | 2018-10-17 | Secondary air system of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109185872B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524637A (en) * | 2020-12-11 | 2021-03-19 | 华中科技大学 | Boiler combustion optimization method and system based on air-powder and CO online monitoring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658507A (en) * | 1992-08-12 | 1994-03-01 | Mitsubishi Heavy Ind Ltd | Combustion apparatus |
| JPH06257733A (en) * | 1993-03-01 | 1994-09-16 | Kawasaki Heavy Ind Ltd | Secondary air in combustion furnace supplying device |
| CN202018057U (en) * | 2011-03-28 | 2011-10-26 | 长沙锅炉厂有限责任公司 | Double-pipe variable secondary air distribution device adopting staggered spray nozzle arrangement for boiler combustion system |
| EP2679899A1 (en) * | 2011-02-22 | 2014-01-01 | Babcock-Hitachi Kabushiki Kaisha | Combustion device |
| CN205592937U (en) * | 2016-04-28 | 2016-09-21 | 中国神华能源股份有限公司 | Two wind regime adherence wind systems are united and are included this pair wind regime adherence wind system boiler all |
| CN205782875U (en) * | 2016-05-27 | 2016-12-07 | 青岛金田热电有限公司 | A kind of secondary wind air-distribution device for CFBB |
| CN108240621A (en) * | 2017-09-05 | 2018-07-03 | 李建锋 | Circulating fluid bed boiler secondary air system |
| CN208952082U (en) * | 2018-10-17 | 2019-06-07 | 烟台龙源电力技术股份有限公司 | A kind of boiler secondary wind system |
-
2018
- 2018-10-17 CN CN201811210128.5A patent/CN109185872B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658507A (en) * | 1992-08-12 | 1994-03-01 | Mitsubishi Heavy Ind Ltd | Combustion apparatus |
| JPH06257733A (en) * | 1993-03-01 | 1994-09-16 | Kawasaki Heavy Ind Ltd | Secondary air in combustion furnace supplying device |
| EP2679899A1 (en) * | 2011-02-22 | 2014-01-01 | Babcock-Hitachi Kabushiki Kaisha | Combustion device |
| CN202018057U (en) * | 2011-03-28 | 2011-10-26 | 长沙锅炉厂有限责任公司 | Double-pipe variable secondary air distribution device adopting staggered spray nozzle arrangement for boiler combustion system |
| CN205592937U (en) * | 2016-04-28 | 2016-09-21 | 中国神华能源股份有限公司 | Two wind regime adherence wind systems are united and are included this pair wind regime adherence wind system boiler all |
| CN205782875U (en) * | 2016-05-27 | 2016-12-07 | 青岛金田热电有限公司 | A kind of secondary wind air-distribution device for CFBB |
| CN108240621A (en) * | 2017-09-05 | 2018-07-03 | 李建锋 | Circulating fluid bed boiler secondary air system |
| CN208952082U (en) * | 2018-10-17 | 2019-06-07 | 烟台龙源电力技术股份有限公司 | A kind of boiler secondary wind system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524637A (en) * | 2020-12-11 | 2021-03-19 | 华中科技大学 | Boiler combustion optimization method and system based on air-powder and CO online monitoring |
| CN112524637B (en) * | 2020-12-11 | 2021-11-19 | 华中科技大学 | Boiler combustion optimization method and system based on air-powder and CO online monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109185872B (en) | 2023-09-19 |
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