CN110107911A - A kind of novel secondary wind system and its working method for face-fired boiler - Google Patents
A kind of novel secondary wind system and its working method for face-fired boiler Download PDFInfo
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- CN110107911A CN110107911A CN201910364407.5A CN201910364407A CN110107911A CN 110107911 A CN110107911 A CN 110107911A CN 201910364407 A CN201910364407 A CN 201910364407A CN 110107911 A CN110107911 A CN 110107911A
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- Prior art keywords
- air
- secondary air
- door
- stratification
- burner
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention discloses a kind of novel secondary wind system and its working method for face-fired boiler, and secondary stratification of wind pipeline is connected by Secondary Air branch pipe with secondary air box, is flared between Secondary Air branch pipe and secondary air box；One end of secondary stratification of wind pipeline is connected with A side secondary air main pipe road, and the other end is connected with B side secondary air main pipe road；Central air hose, primary air piping, outer second air door and inner second air door are provided on burner, the middle part of burner is arranged in outer second air door, the inside of outer secondary air register is arranged in inner second air door, and central air hose has part to be sleeved in primary air piping, and primary air piping is located at the inside of inner second air door；Secondary air box is connected to by burner with burner hearth.The use secondary air box bottom air inlet of the innovation realizes secondary air box bottom not dust stratification, and uses several Secondary Air branch pipes, respectively from secondary air box bottom air inlet, efficiently solves the problems, such as that opposed firing secondary system bellows assignment of traffic is uneven.
Description
Technical field
The present invention relates to a kind of novel secondary wind systems and its working method for face-fired boiler.
Background technique
Current face-fired boiler, Secondary Air is fed using public bellows, after secondary air box is divided into stokehold bellows and furnace
Bellows are divided into small bellows according to the burner number of plies again after bellows, stokehold and furnace, i.e. every layer of burner shares a bellows, wind-box shape
Shape is cuboid, since every layer small bellows two sides are entered the wind, the pressure in bellows width direction is caused to be unevenly distributed (intermediate pressure
Greatly, pressure at both sides is small), cause middle section burner to be in oxygen-enriched combusting state, discharged nitrous oxides concentration is very high, two sides combustion
Burner is in anoxycausis state, and high temperature corrosion is very serious, at present mainly by the inside and outside each burner of secondary air register aperture regulation
Secondary air flow, but the increase of air door resistance brings restriction loss, and regulating effect is unobvious, and both walls water wall high temperature corrosion remains unchanged
In the presence of.
There is also a problems for the air distribution mode of face-fired boiler Secondary Air at present: secondary air box bottom dust stratification is serious,
Main cause is that the dust stratification inside rotary regenerative air heater heat exchange element is blown into secondary air duct by the biggish Secondary Air of flow velocity, is entered back into
Secondary air box, space increase, and flow velocity reduces, and ashes is deposited on the bottom of secondary air box.Dust stratification is more, can destroy burner eddy flow
The normal eddy flow state of wind field, leads to rough burning.Ash bucket is added in bellows bottom at present to carry out deashing or utilize to overhaul
Chance carries out concentration deashing, and such as application No. is 201820550044.5 Chinese patents, but ash bucket easily blocks, and concentrates ashman
Work amount is big, at high cost.
Realize secondary air box Even air distribution and secondary air box bottom not dust stratification, at present face-fired boiler secondary air system
It is difficult to solve this problem, therefore, develops a kind of novel secondary wind system and method for face-fired boiler, realize secondary
Dust stratification is not very necessary for bellows Even air distribution and secondary air box bottom.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of for opposed firing pot
The novel secondary wind system and its working method of furnace, innovative use secondary air box bottom air inlet, realize secondary air box bottom
Portion's not dust stratification, and evenly distributed using several Secondary Air branch pipes respectively from secondary air box bottom air inlet conducive to Secondary Air,
Efficiently solve the problems, such as that opposed firing secondary system bellows assignment of traffic is uneven.
Technical solution used by the present invention solves the above problems is: a kind of novel secondary wind for face-fired boiler
System, characterized in that including secondary stratification of wind pipeline, Secondary Air branch pipe, flaring, secondary air box, burner, A side secondary air main pipe
Road, B side secondary air main pipe road, the side A damper, the side B damper, central air hose, primary air piping, outer second air door and interior two
Secondary air door；The secondary stratification of wind pipeline is connected by Secondary Air branch pipe with secondary air box, the flaring positioned at Secondary Air branch pipe and
Between secondary air box；One end of the secondary stratification of wind pipeline is connected with A side secondary air main pipe road, and the one of secondary stratification of wind pipeline
End is provided with the side A damper, and the other end of the secondary stratification of wind pipeline is connected with B side secondary air main pipe road, and in Secondary Air
The other end of layer pipeline is provided with the side B damper；Central air hose, primary air piping, outer second air are provided on the burner
The middle part of burner is arranged in door and inner second air door, the outer second air door, and the inner second air door is arranged in outer second air
The inside of door, the central air hose have part to be sleeved in primary air piping, and the primary air piping is located at the inside of inner second air door；
The secondary air box is connected to by burner with burner hearth.
Preferably, the quantity of the Secondary Air branch pipe is 3 ~ 5, corresponding two burners of each Secondary Air branch pipe.
Preferably, it is described flaring be conical hopper shape structure, material be wear-resisting alloy steel, the side wall of the flaring and its
The angle of axis is 30 ° ~ 45 °.
Preferably, the secondary air box is rectangular parallelepiped structure, and bottom is communicated with flaring.
Preferably, the primary air piping runs through secondary air box, and the primary air piping outer surface being located inside secondary air box is set
It is equipped with anti-wearing ceramic shield watt.
Preferably, the side A damper and the side B damper are adjacent with the left side wall and right-side wall of burner hearth respectively.
The working method of the novel secondary wind system for face-fired boiler, its main feature is that, process is as follows:
Step 1: hot Secondary Air passes through the side secondary air main pipe road A and the side secondary air main pipe road B respectively enters secondary stratification of wind pipeline；
Step 2: the hot Secondary Air inside secondary stratification of wind pipeline enters secondary air box by Secondary Air branch pipe and by flaring；
Step 3: hot Secondary Air inside secondary air box enters furnace by outer second air door in burner and inner second air door
Thorax.
Compared with prior art, the present invention having the following advantages that and effect:
1) present invention is flared using Secondary Air branch pipe and conical hopper shape structure, realizes secondary air box bottom air inlet, can be incited somebody to action
The dust stratification of bellows bottom raises again, enters burner hearth with the wind, efficiently solves secondary air box bottom dust stratification and is difficult to clear up and shadow
The problems such as ringing secondary wind flow field.
2) present invention is uniformly divided respectively from secondary air box bottom air inlet conducive to Secondary Air using several Secondary Air branch pipes
Match, efficiently solves the problems, such as that opposed firing secondary system bellows assignment of traffic is uneven.
Detailed description of the invention
Fig. 1 is the positive structure diagram of the embodiment of the present invention.
Fig. 2 is the side structure schematic view of the embodiment of the present invention.
In figure: secondary stratification of wind pipeline 1, Secondary Air branch pipe 2, flaring 3, secondary air box 4, burner 5, A side secondary air main pipe
Road 6, B side secondary air main pipe road 7, the side A damper 8, the side B damper 9, central air hose 10, primary air piping 11, burner hearth 12,
Outer second air door 13, inner second air door 14.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1 to Fig. 2, the novel secondary wind system for face-fired boiler in the present embodiment, including Secondary Air
Layer pipeline 1, Secondary Air branch pipe 2, flaring 3, secondary air box 4, burner 5, A side secondary air main pipe road 6, B side secondary air main pipe road
7, the side A damper 8, the side B damper 9, central air hose 10, primary air piping 11, outer second air door 13 and inner second air door 14.
Secondary stratification of wind pipeline 1 is connected by Secondary Air branch pipe 2 with secondary air box 4, and flaring 3 is located at Secondary Air branch pipe 2 and two
Between secondary bellows 4；One end of secondary stratification of wind pipeline 1 is connected with A side secondary air main pipe road 6, and in one end of secondary stratification of wind pipeline 1
It is provided with the side A damper 8, the other end of secondary stratification of wind pipeline 1 is connected with B side secondary air main pipe road 7, and in secondary stratification of wind pipe
The other end in road 1 is provided with the side B damper 9；Central air hose 10, primary air piping 11, outer second air door are provided on burner 5
13 and inner second air door 14, the middle part of burner 5 is arranged in outer second air door 13, and inner second air door 14 is arranged in outer secondary air register
13 inside, central air hose 10 have part to be sleeved in primary air piping 11, and primary air piping 11 is located at the inside of inner second air door 14；
Secondary air box 4 is connected to by burner 5 with burner hearth 12.
The quantity of Secondary Air branch pipe 2 is 3 ~ 5, corresponding two burners 5 of each Secondary Air branch pipe 2.Flaring 3 is leaked for taper
Bucket-shaped structure, material are wear-resisting alloy steel, and being flared 3 side wall and the angle of its axis is 30 ° ~ 45 °.Secondary air box 4 is length
Cube structure, bottom are communicated with flaring 3.Primary air piping 11 runs through secondary air box 4, and is located at primary inside secondary air box 4
11 outer surface of air hose is provided with anti-wearing ceramic shield watt.The side A damper 8 and the side B damper 9 respectively with the left side wall of burner hearth 12
It is adjacent with right-side wall.
Process is as follows:
Step 1: hot Secondary Air passes through A side secondary air main pipe road 6 and B side secondary air main pipe road 7 respectively enters secondary stratification of wind pipeline
1；
Step 2: the hot Secondary Air inside secondary stratification of wind pipeline 1 enters secondary air box by Secondary Air branch pipe 2 and by flaring 3
4；
Step 3: hot Secondary Air inside secondary air box 4 by outer second air door 13 in burner 5 and inner second air door 14 into
Enter burner hearth 12.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology should belong to guarantor of the invention in made change without departing from the spirit and scope of the invention
Protect range.
Claims (7)
1. a kind of novel secondary wind system for face-fired boiler, characterized in that including secondary stratification of wind pipeline (1), secondary
Wind branch pipe (2), flaring (3), secondary air box (4), burner (5), A side secondary air main pipe road (6), B side secondary air main pipe road
(7), the side A damper (8), the side B damper (9), central air hose (10), primary air piping (11), outer second air door (13) and
Inner second air door (14)；The secondary stratification of wind pipeline (1) is connected by Secondary Air branch pipe (2) with secondary air box (4), the flaring
(3) between Secondary Air branch pipe (2) and secondary air box (4)；One end of the secondary stratification of wind pipeline (1) and A side secondary air are female
Pipeline (6) is connected, and one end of secondary stratification of wind pipeline (1) is provided with the side A damper (8), the secondary stratification of wind pipeline (1)
The other end be connected with B side secondary air main pipe road (7), and the other end of secondary stratification of wind pipeline (1) is provided with the side B damper
(9)；Central air hose (10), primary air piping (11), outer second air door (13) and inner second air door are provided on the burner (5)
(14), at the middle part of burner (5), the inner second air door (14) is arranged in outer second air for outer second air door (13) setting
The inside of door (13), the central air hose (10) have part to be sleeved in primary air piping (11), and the primary air piping (11) is located at
The inside of inner second air door (14)；The secondary air box (4) is connected to by burner (5) with burner hearth (12).
2. the novel secondary wind system according to claim 1 for face-fired boiler, characterized in that the Secondary Air
The quantity of branch pipe (2) is 3 ~ 5, corresponding two burners (5) of each Secondary Air branch pipe (2).
3. the novel secondary wind system according to claim 1 for face-fired boiler, characterized in that the flaring
It (3) is conical hopper shape structure, material is wear-resisting alloy steel, the side wall of the flaring (3) and the angle of its axis be 30 ° ~
45°。
4. the novel secondary wind system according to claim 1 for face-fired boiler, characterized in that the Secondary Air
Case (4) is rectangular parallelepiped structure, and bottom is communicated with flaring (3).
5. the novel secondary wind system according to claim 1 for face-fired boiler, characterized in that the First air
It manages (11) and runs through secondary air box (4), and be located at secondary air box (4) internal primary air piping (11) outer surface and be provided with anti-wearing ceramic
Shield watt.
6. the novel secondary wind system according to claim 1 for face-fired boiler, characterized in that the side A tune
It saves air door (8) and the side B damper (9) is adjacent with the left side wall of burner hearth (12) and right-side wall respectively.
7. a kind of work side of such as novel secondary wind system of any of claims 1-6 for face-fired boiler
Method, characterized in that process is as follows:
Step 1: hot Secondary Air passes through A side secondary air main pipe road (6) and B side secondary air main pipe road (7) respectively enters secondary stratification of wind
Pipeline (1)；
Step 2: the hot Secondary Air of secondary stratification of wind pipeline (1) inside enters two by Secondary Air branch pipe (2) and by flaring (3)
Secondary bellows (4)；
Step 3: the hot Secondary Air of secondary air box (4) inside passes through the outer second air door (13) and inner second air in burner (5)
Door (14) enters burner hearth (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910364407.5A CN110107911B (en) | 2019-04-30 | 2019-04-30 | Secondary air system for opposed firing boiler and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910364407.5A CN110107911B (en) | 2019-04-30 | 2019-04-30 | Secondary air system for opposed firing boiler and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110107911A true CN110107911A (en) | 2019-08-09 |
| CN110107911B CN110107911B (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910364407.5A Active CN110107911B (en) | 2019-04-30 | 2019-04-30 | Secondary air system for opposed firing boiler and working method thereof |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060844A (en) * | 2021-11-24 | 2022-02-18 | 国能蚌埠发电有限公司 | Prevent bellows structure of secondary bellows deposition |
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|---|---|
| CN110107911B (en) | 2023-09-08 |
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