CN101280915B - W flame boiler furnace arranging air nozzle on side wall - Google Patents
W flame boiler furnace arranging air nozzle on side wall Download PDFInfo
- Publication number
- CN101280915B CN101280915B CN 200810044353 CN200810044353A CN101280915B CN 101280915 B CN101280915 B CN 101280915B CN 200810044353 CN200810044353 CN 200810044353 CN 200810044353 A CN200810044353 A CN 200810044353A CN 101280915 B CN101280915 B CN 101280915B
- Authority
- CN
- China
- Prior art keywords
- side wall
- air
- wall
- air nozzle
- burner hearth
- 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.)
- Active
Links
Images
Abstract
The invention pertain to 'W' flame combustion boiler combustion chamber equipped with air nozzles on combustion chamber side, comprising a combustion chamber body having front, rear walls containing a belt crown of oven and a double-side wall equipped with air nozzles, and upper, lower combustion chambers equipped on the body, a combustion chamber hopper, a combustor group equipped on the crown of oven, an air inlet adjusting plate and a wind box group. According to the invention, a nozzle group capable of supplying axial flow air and side stream air into the combustion chamber is equipped onthe double-side wall, thereby reducing the concentration of CO by 50-500ppm, temperature by 100-400 DEG C, increasing boiler thermal efficiency by 0.1-0.5%, reducing discharge amount of NOX by 50-200mg. Thus severe coking and high-temperature corrosion on side wall water screen can be effectively prevented, safety operation can be secured and examination and repair amount of work of combustion chamber can be reduced, the service-life can be prolonged. The invention overcomes disadvantages of easy severe coking and high-temperature corrosion of the side wall in background art.
Description
Technical field
The invention belongs to a kind of large-sized station boiler burner hearth, particularly a kind of " W " flame boiler furnace that on side wall, is provided with air nozzle.
Background technology
Increasing to electricity needs along with both at home and abroad, station boiler develops towards big capacity and high parameter aspect, but because the finiteness of coal resource reaches the requirement to disposal of pollutants, has determined that coal used for station boiler will be main with low volatile, low-calorie colm." W " flame burning technology has solved the stability and the integrity problem of large-sized station boiler burning low-volatite coal basically; This type of boiler furnace comprises the forward and backward body of wall of being with chimney arch, and the both sides body of wall is located at the sets of burners on the forward and backward chimney arch; Bellows group between forward and backward wall insulating layer and water-cooling wall; The air inlet adjustment plate, furnace hopper, thereby have aspect the colm that uses high ash, low volatile that combustion stability is good, the after-flame degree is than characteristics such as height.But, some shortcomings have also been found along with the accumulation of the deep and field test data that " W " flame boiler is studied.Like NO
xDischarge capacity is higher, later stage oxygenating condition is relatively poor, side wall is prone to serious coking and high temperature corrosion etc.Some boiler coke is serious, has had influence on the efficiency of combustion and the safe operation of boiler.
Summary of the invention
The objective of the invention is to the defective of background technology existence and the reason of generation, a kind of " W " flame boiler furnace with the air nozzle group of research and design to reach enhancing to the oxygenating of burner hearth later stage, improves O
2In the time of concentration and efficiency of combustion; Reduce wash away CO concentration and the temperature with nearside wall district of flame to side water wall; Effectively be in operation serious coking and the high temperature corrosion etc. of prevention both walls water-cooling wall influence the generation of safe operation phenomenon; Reduce the burner hearth maintenance workload, purpose such as increase the service life.
Show according to " W " shape Flame Boiler Furnace combustion process being carried out the numerical simulation experiment; Coking, the particularly coking of burner hearth both walls and high temperature corrosion are the intrinsic structural defects of " W " flame boiler; Its reason is: owing to be " W " shape at the flame of upper and lower burner hearth internal combustion; The coal dust primary air is being moved downward in the process by forward and backward chimney arch place obviously to the side wall deflection in the stove; Cause pulverized coal flame to wash away side wall and produce high temperature, hypoxemia district, appear due to the reducing atmosphere in side wall near zone active combustion.Therefore scheme of the present invention is: on the burner hearth both walls, set up air nozzle (group) respectively, direct current air (wind) and effluent air (wind) are provided in burner hearth, with oxygenating in burner hearth, improve O
2Concentration and reduction burner hearth proximal wall zone C O concentration and thermic load are effectively prevented serious coking of side water wall and high temperature corrosion, guarantee its safe operation, thereby realize its goal of the invention.Therefore; The present invention includes the forward and backward burner hearth body of wall that is provided with chimney arch between the upper and lower body of wall and both sides body of wall in interior burner hearth main body and be located at the upper and lower burner hearth in it; Furnace hopper; Be located at the sets of burners on the forward and backward chimney arch, the air inlet adjustment plate on forward and backward down body of wall water-cooling wall and be located at the bellows group between forward and backward wall insulating layer and the water-cooling wall, key is on the both walls of burner hearth, also to be respectively equipped with the air nozzle that axial flow (direct current) air and effluent air can be provided simultaneously; Each nozzle is symmetrical set corresponding to the side wall center line, and each nozzle body is anchored on respectively on the side wall and with corresponding upper and lower burner hearth cavity and is communicated with.
The said air nozzle that axial flow air and effluent air can be provided simultaneously; The nozzle with three grade jet pipes of its air nozzle for being provided with one heart; And the spout of core jet pipe is straight mouthful or bundle mouth; Second and third grade jet pipe is toroidal nozzle, and its spout is 30 °～60 ° horn mouths, in the annular channel of two jet pipes, is respectively equipped with rotational flow generator simultaneously.And said each air nozzle is symmetrical set 1～4 row corresponding to the side wall center line; And be located at respectively on the side wall body of upper and lower burner hearth.
The present invention both improved the oxygenating intensity that in burner hearth, reaches nearside wall district owing to traditional " W " flame boiler furnace in, respectively set up air nozzle on the both walls, reduced the concentration of CO that should the zone and the temperature of nearside wall area.Nearside wall district CO concentration of the present invention can reduce by 50～500ppm, temperature reduces by 100～400 ℃, and boiler thermal output improves 0.1～0.5%, NO
xDischarge capacity reduces by 50～200mg/Nm
3Thereby have at raising boiler thermal output, reduction NO
xIn the time of discharge capacity, can effectively prevent serious coking of both walls water-cooling wall and high temperature corrosion, guarantee safe operation of the boiler, and reduce the burner hearth maintenance workload, prolong characteristics such as its working life.
Description of drawings
Fig. 1 concerns sketch map for the mutual alignment that structure of the present invention reaches in boiler integral body; Wherein the upper furnace two-dot chain line is remaining part structural representations such as boiler heating surface, drum.
Among the figure: 1. (burner hearth) preceding body of wall, go up body of wall before 1～1., chimney arch before 1～2., body of wall down before 1～3., 2～1. upper furnaces; 2～2. lower hearths, 3. (burner hearth) back wall, body of wall is gone up in 3～1. backs, 3～2. back chimney arch, 3～3. backs are body of wall down; 4. furnace hopper, 5. air nozzle, 6～1,6～2. bellows, 7. air inlet adjustment plate, 8. burner hearth heat-insulation layer; 9. furnace wall cooling, 10. powdered coal burner, 11. heating surfaces, 12. drums.
The specific embodiment
With 600MW subcritical " W " flame boiler furnace is example: the forward and backward body of wall 1,3 of burner hearth (comprising forward and backward upper and lower body of wall 1～1,3～1,1～3,3～3 and forward and backward chimney arch 1～2,3～2) is all identical with background technology; Be the wide 34.5m of being; Upper furnace 2～1 dark (upper furnace inner chamber water-cooling wall is wide) 9.9m, lower hearth 2～2 dark (being that the inner chamber water-cooling wall is wide) 16.0m; Quantity of set burner 10 on the forward and backward chimney arch 1～2 and 3～2 (each 18) and arrangement mode, and burner hearth (all around) heat-insulation layer 8, burner hearth (around the inner chamber) water-cooling wall 9; Bellows 6～1,6～2; Air inlet adjustment plate 7, furnace hopper 4, its structure and arrangement are also all identical with background technology; This embodiment is relative its center line symmetric arrangement 3 emptying gas jets 5 on both walls; Wherein: the 1st row (go up most row) is located on the side wall of upper furnace 2～1, each nozzle centerline is located at the above 3.0m of the interface place of going up body of wall 1～1,3～1 and forward and backward chimney arch 1～2 and 3～2 apart from forward and backward, between each nozzle center apart from 1.9m; 2nd, 3 rows all are located on the side wall of lower hearth 2～2; The 2nd row establishes 3, every at a distance of 3.4m; The 3rd row establishes 4 every at a distance of also being 3.4m, and the 2nd, 3 row's nozzle centerlines lay respectively at the forward and backward following 2.0m of interface and 5.0m place (promptly the spacing between the 1st row and the 2nd row and the 2nd row and the 3rd row's nozzle is respectively 5.0m and 3.0m) of going up body of wall 1～1,3～1 and forward and backward chimney arch 1～2,3～2 of burner hearth.It is 20 ° of bundle mouths that each air nozzle 5 all adopts core jet pipe diameter phi 460mm, oral area; And two, tertiary circulation shape jet pipe large diameter is respectively φ 762mm and φ 887mm; Band rotational flow generator and nozzle hole are 45 ° of bell-mouthed air nozzles in each runner, and each air nozzle 5 is all identical with the connected mode of forward and backward chimney arch 1～2,3～2 with burner 10 with the connected mode of side wall body.
Claims (3)
1. " W " flame boiler furnace that air nozzle is set on side wall; Comprise burner hearth main body and be located at the upper and lower burner hearth in the burner hearth main body with the forward and backward burner hearth body of wall that is provided with chimney arch between the upper and lower body of wall and both sides body of wall; Furnace hopper; Be located at the sets of burners on the forward and backward chimney arch; Air inlet adjustment plate on forward and backward down body of wall water-cooling wall and be located at the bellows group between forward and backward wall insulating layer and the water-cooling wall; It is characterized in that on the both walls of burner hearth, also being respectively equipped with the air nozzle that axial flow air and effluent air can be provided simultaneously, each air nozzle is symmetrical set corresponding to the side wall center line, and each air nozzle is anchored on respectively on the side wall of upper and lower burner hearth and with corresponding upper and lower burner hearth cavity and is communicated with.
2. by said " W " flame boiler furnace that air nozzle is set on side wall of claim 1; It is characterized in that the said air nozzle that axial flow air and effluent air can be provided simultaneously; Its air nozzle is the concentric nozzle with three grades of jet pipes that is provided with, and the spout of core jet pipe is straight mouthful or restraints mouth that second and third grade jet pipe is toroidal nozzle; Its spout is 30 °～60 ° horn mouths, in the annular channel of two jet pipes, is respectively equipped with rotational flow generator simultaneously.
3. by said " W " flame boiler furnace that air nozzle is set of claim 1, it is characterized in that said each air nozzle is symmetrical set 1～4 row corresponding to the side wall center line on side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810044353 CN101280915B (en) | 2008-05-07 | 2008-05-07 | W flame boiler furnace arranging air nozzle on side wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810044353 CN101280915B (en) | 2008-05-07 | 2008-05-07 | W flame boiler furnace arranging air nozzle on side wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101280915A CN101280915A (en) | 2008-10-08 |
| CN101280915B true CN101280915B (en) | 2012-12-19 |
Family
ID=40013511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810044353 Active CN101280915B (en) | 2008-05-07 | 2008-05-07 | W flame boiler furnace arranging air nozzle on side wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101280915B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225805B (en) * | 2013-04-24 | 2015-03-18 | 广东电网公司电力科学研究院 | Boiler apparatus for preventing high temperature corrosion of water screen and method therefor |
| CN109945163B (en) * | 2019-03-11 | 2019-10-22 | 哈尔滨工业大学 | A kind of W flame boiler for arranging anti-hemiplegia above wall after rear chimney arch and dry bottom hopper |
| CN109945165B (en) * | 2019-03-11 | 2019-11-05 | 哈尔滨工业大学 | A kind of W flame boiler of chimney arch asymmetric arrangement |
| CN112393230A (en) * | 2019-08-16 | 2021-02-23 | 付烜 | Improve pulverized coal burnout rate and reduce NOxBoiler plant for generating quantities |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831426A (en) * | 2005-03-10 | 2006-09-13 | 三井巴布科克能源公司 | Supercritical downshot boiler |
| CN101050854A (en) * | 2007-05-18 | 2007-10-10 | 哈尔滨工业大学 | W-shape flame boiler for preventing side wall water cooling wall slagging scorification |
| CN201025362Y (en) * | 2007-02-28 | 2008-02-20 | 哈尔滨工业大学 | A low nitrogen oxide vortex combustion device preventing from high temperature erosion |
| JP4080517B2 (en) * | 2005-04-05 | 2008-04-23 | 東洋ガラス株式会社 | Optical fiber collimator system and method for manufacturing optical fiber collimator array system |
-
2008
- 2008-05-07 CN CN 200810044353 patent/CN101280915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831426A (en) * | 2005-03-10 | 2006-09-13 | 三井巴布科克能源公司 | Supercritical downshot boiler |
| JP4080517B2 (en) * | 2005-04-05 | 2008-04-23 | 東洋ガラス株式会社 | Optical fiber collimator system and method for manufacturing optical fiber collimator array system |
| CN201025362Y (en) * | 2007-02-28 | 2008-02-20 | 哈尔滨工业大学 | A low nitrogen oxide vortex combustion device preventing from high temperature erosion |
| CN101050854A (en) * | 2007-05-18 | 2007-10-10 | 哈尔滨工业大学 | W-shape flame boiler for preventing side wall water cooling wall slagging scorification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101280915A (en) | 2008-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107975782B (en) | A kind of the fractional combustion boiler system and method for slag combustion with meagre oxygen catalysis oxidation | |
| CN105627280B (en) | A kind of lignite semi-coke combustion with meagre oxygen boiler | |
| CN101280915B (en) | W flame boiler furnace arranging air nozzle on side wall | |
| CN107488470A (en) | A kind of gasification furnace and method of plasma slag tap | |
| CN101280919B (en) | Forward and backward wall opposite rushing combustion boiler hearth as well as method for arranging air nozzle on side wall | |
| CN204345612U (en) | Living beings chain-grate boiler Novel hearth structure | |
| CN104566337A (en) | Novel hearth structure of biomass chain boiler | |
| CN112377894B (en) | Pulverized coal combustion boiler with air-cut circle | |
| CN113405099A (en) | High-load high-parameter waste incineration boiler | |
| CN102128446B (en) | Boiler for carrying out mixed combustion on carbon black tail gas and coal | |
| CN106196013A (en) | Use the pluralities of fuel high-temperature gasification boiler of reducing process denitration | |
| CN110160038B (en) | Semi-gasification combustion pressure-bearing boiler for biomass briquette | |
| CN207094608U (en) | W burning boilers, which mix fired biomass gas, reduces NOx arrangement | |
| CN111637449A (en) | Straw bundle burning direct-combustion grain drying hot-blast stove | |
| CN209481593U (en) | The full recovery system of coal gasification waste heat | |
| CN207175881U (en) | A kind of gasification furnace of plasma slag tap | |
| CN205991483U (en) | Pluralities of fuel high-temperature gasification boiler using reducing process denitration | |
| CN207635377U (en) | A kind of biomass boiler air hose deployment mechanism of swirl combustion | |
| CN214147857U (en) | Wind tangent circle pulverized coal combustion boiler | |
| CN212361992U (en) | Straw bundle burning direct-combustion grain drying hot-blast stove | |
| CN205447700U (en) | Oxygendeficient burning boiler of brown coal semicoke | |
| CN210568368U (en) | Biomass briquette fuel semi-gasification combustion pressure-bearing boiler | |
| CN212108357U (en) | Biomass boiler | |
| CN107477865B (en) | Hot-blast stove | |
| CN2689067Y (en) | Rice husk carburizing furnace by bubbling bed combustion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |