CN201662058U - Two-section clean combustion coal-fired boiler combustion chamber - Google Patents
Two-section clean combustion coal-fired boiler combustion chamber Download PDFInfo
- Publication number
- CN201662058U CN201662058U CN2010200426660U CN201020042666U CN201662058U CN 201662058 U CN201662058 U CN 201662058U CN 2010200426660 U CN2010200426660 U CN 2010200426660U CN 201020042666 U CN201020042666 U CN 201020042666U CN 201662058 U CN201662058 U CN 201662058U
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- China
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- header
- water
- screen tube
- cooled wall
- water screen
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Abstract
Disclosed is a two-section clean combustion coal-fired boiler combustion chamber, which comprises an upper header and a lower header and a water-cooled wall tube which is connected between the headers, and is characterized in that: the diameter of a lower annular header is more than that of an upper annular header. A conical one-section combustion chamber with smaller upper part and larger lower part consists of the upper and lower annular header and an S-shaped water-cooled wall tube. An outside water-cooled wall tube is welded between the upper and lower annular header and the S-shaped water-cooled wall tube; no fins are welded on an inclined middle section of the S-shaped water-cooled wall tube so as to form a flue gas outlet; and a two-section combustion chamber is formed in an annular space between the outside water-cooled wall and an upper film-type water-cooled wall outside. The utility model has the advantages of low NOx discharge concentration, the capacity of also reducing the CO2 discharge, and good environmental protection effect.
Description
Technical field
The utility model relates to boiler.
Background technology
There are 500,000 of Industrial Boilers in China, and wherein 90% is grate furnace.In order to improve the thermal efficiency, adopt the burning of high-temperature oxygen-enriched method usually, nitrogen oxide meanwhile, sulfide etc. also generate in a large number, cause air pollution.This boiler is used follow-up governing measure usually, and as reduce the discharging of pollutant by equipment such as pickling, alkali cleaning, dedusters, not only treatment cost is high, and effect is also undesirable.
Summary of the invention
Two sections clean burning coal-burning boiler combustion chambers providing a kind of environment protecting good are provided the purpose of this utility model, comprise, lower collecting box and be connected water screen tube between the header, the diameter of annular header is greater than the diameter of last annular header under it is characterized in that, on, water screen tube between the annular header is S-shaped down, weld fin between the water screen tube epimere, form the top fin panel casing, on, annular header and S shape water screen tube are formed one section combustion chamber of up-small and down-big truncated cone-shaped down, last, weld outer side water wall tube down between the annular header between the S shape water screen tube at interval, weld fin between outer side water wall tube and the S shape water screen tube hypomere, form the bottom fin panel casing, fin is not welded in S water-cooling wall inclination stage casing, form exhanst gas outlet, the annular space in the outer side wall and the top fin panel casing outside constitutes two sections combustion chambers.
This combustion chamber coal is dropped into by the top, is piled into thick coal seam in one section combustion chamber, and air is entered by rotary fire grate bottom, passes and enters burning zone after grieshoch is preheated, and coal is from top to bottom drying, destructive distillation, reduction, oxidation, after-flame successively, generation CO
2, emit a large amount of heat simultaneously.High-temperature flue gas from bottom to top enters reducing zone, portion C O
2Be reduced into CO, the CO and the dry distillation of coal form C
mH
n, H
2Together enter in two sections combustion chambers Deng fuel gas and high-temperature flue gas, mix burning away with secondary wind, high-temperature flue gas washes away comb heating surface, economizer etc. and enters atmosphere after the radiation heat release.The lime-ash that burning forms is rotated fire grate and dials in airtight grey chamber.
The two stage combustion biggest advantage is exactly that the NOx concentration of emission is low.In one section combustion chamber, α＜1 ignition temperature and oxygen concentration are all lower, are unfavorable for that nitrogen and oxidation close, and the NOx growing amount is lower.Under the low condition of oxygen concentration, part nitrogen also may generate ammonia, N+H with the H-H reaction in the fuel
2→ NH
3Ammonia can be reduced into nitrogen to the NOx that has generated, NO again
X+ NH
3→ N
2+ H
2O further reduces NOx.The fuel gas that enters two sections combustion chambers with burn away after secondary wind mixes, arrange enough water-cooling walls in two sections combustion chambers, can be with average cigarette temperature control at 800～850 ℃, it is minimum that data shows that under this temperature conditions burning generates NOx.Test result shows, the NOx concentration of emission＜150mg/m3 of boiler.
Two sections clean burning coal-burning boiler combustion chambers can also reduce CO
2Discharging, the smoke evacuation coefficient of excess air can be lower, improved boiler thermal output, compares with the boiler of identical heating load, actual Coal-fired capacity descends, thereby can reduce the discharging of CO2.
Description of drawings
Accompanying drawing 1 is the utility model front view;
Accompanying drawing 2 is the utility model cutaway view.
Legend: 1, go up annular header, 2, outer side water wall tube, 3, S shape water screen tube, 4, two sections combustion chambers, 5, S shape water screen tube stage casing, 6, water screen tube hypomere fin, 7, one sections combustion chambers, 8, annular lower collecting box, 9, water screen tube epimere fin.
The specific embodiment
As shown in Figure 1, S shape water screen tube epimere and vertical welding of last annular header, S shape water screen tube stage casing outwards bends that its hypomere is vertical with lower collecting box to be welded.Weld fin between the water screen tube epimere, form the top fin panel casing, upper and lower annular header and S shape water screen tube are formed one section combustion chamber of up-small and down-big truncated cone-shaped.Between the upper and lower annular header outside one of S shape water screen tube welding side water wall tube, weld fin between outer side water wall tube and the S shape water screen tube hypomere, form the bottom fin panel casing, S water-cooling wall inclination stage casing part is not welded fin, form exhanst gas outlet, the annular space in the outer side wall and the top fin panel casing outside constitutes two sections combustion chambers.For two tons boiler, go up 1200 millimeters of annular header diameters, 1500 millimeters of following annular header diameters.1600 millimeters of combustion chamber height.The annular thickness of two sections combustion chambers that the annular space in the outer side wall and the top fin panel casing outside constitutes is 200 millimeters.
Claims (1)
1. two sections clean burning coal-burning boiler combustion chambers, comprise, lower collecting box and be connected water screen tube between the header, the diameter of annular header is greater than the diameter of last annular header under it is characterized in that, on, water screen tube between the annular header is S-shaped down, weld fin between the water screen tube epimere, form the top fin panel casing, on, annular header and S shape water screen tube are formed one section combustion chamber of up-small and down-big truncated cone-shaped down, last, weld outer side water wall tube down between the annular header between the S shape water screen tube at interval, weld fin between outer side water wall tube and the S shape water screen tube hypomere, form the bottom fin panel casing, fin is not welded in S shape water-cooling wall inclination stage casing, form exhanst gas outlet, the annular space in the outer side wall and the top fin panel casing outside constitutes two sections combustion chambers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200426660U CN201662058U (en) | 2010-01-20 | 2010-01-20 | Two-section clean combustion coal-fired boiler combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200426660U CN201662058U (en) | 2010-01-20 | 2010-01-20 | Two-section clean combustion coal-fired boiler combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201662058U true CN201662058U (en) | 2010-12-01 |
Family
ID=43232475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200426660U Expired - Fee Related CN201662058U (en) | 2010-01-20 | 2010-01-20 | Two-section clean combustion coal-fired boiler combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201662058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036326A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of wastes pre-processing system and its technique |
-
2010
- 2010-01-20 CN CN2010200426660U patent/CN201662058U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036326A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of wastes pre-processing system and its technique |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20120120 |