CN103115353B - Half-W-shaped flame burning supercritical power station boiler - Google Patents
Half-W-shaped flame burning supercritical power station boiler Download PDFInfo
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- CN103115353B CN103115353B CN201310067292.6A CN201310067292A CN103115353B CN 103115353 B CN103115353 B CN 103115353B CN 201310067292 A CN201310067292 A CN 201310067292A CN 103115353 B CN103115353 B CN 103115353B
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Abstract
The invention discloses a half-W-shaped flame burning supercritical power station boiler, and relates to a power station boiler which is used in a thermal power station, burns anthracites or low volatile lean coals, has a supercritical steam condition. The half-W-shaped flame burning supercritical power station boiler comprises a lower hearth with a front arch and a rear arch, the front arch and the rear arch of the lower hearth are respectively provided with two rows of weak vortex burners, and the slightly lower parts of a front wall and a rear wall of the lower hearth are respectively provided with one line of dual register burners. One layer or two layers of separated secondary air nozzles are arranged at the parts of front wall and rear wall of the upper hearth, which are away from the bottom of a platen superheater by 8m-12m. Each row of burners is arranged uniformly along the furnace width. According to the half-W-shaped flame burning supercritical power station boiler, the furnace side thermal deviation of the lower hearth water-wall tube is reduced significantly, the water circulation reliability is improved significantly, the Nox generation amount is decreased significantly, and the half-W-shaped flame burning supercritical power station boiler can adopt a less-oil or oil-free pulverized coal ignition technology easily, can be easily in large scale and can be used for designing and manufacturing the supercritical power station boiler which is in 1000MW level and burns anthracites or low volatile lean coals.
Description
(1) technical field:
The present invention half " W " flame combustion supercritical power station boiler relates to the novel furnace with the station boiler of supercritical steam conditions using anthracite or Low Volatile Lean Coal that a kind of thermal power station uses.
(2) background technology:
The typical type of furnace using the station boiler of anthracite or Low Volatile Lean Coal that the thermal power station of prior art uses is " W " flame combustion boiler, has subcritical steam conditions or supercritical steam conditions; The lower hearth water-cooling wall with " W " flame combustion boiler of supercritical steam conditions employs low-quality flow technology without exception, lower hearth water-cooling wall will cause the forfeiture of forward flow self compensation characteristic along the thermal deviation that stove cross direction is excessive, jeopardizes lower hearth water-cooling wall security of operation.
The burner of " W " flame combustion boiler is all arranged on the narrow vault of forward and backward wall, be arranged in burner Jet with downward flow direction breeze airflow and the part Secondary Air of vault, upwards, " U " shape flame of front and back forms " W " flame to the turnover of its flame directive burner hearth center; The forward and backward wall paper of lower hearth is equipped with Secondary Air and tertiary air spout.The burner of prior art " W " flame combustion boiler has cross-tube burner (parallel flow burner) and the large class of weak vortex burner two.Very high lower hearth volume heat load selected usually by " W " flame combustion boiler, arranges large area wall with refractory lining, refracto.
Prior art large and medium-sized " W " flame combustion boiler usual adapted double-in and double-out ball mill positive pressure direct blowing powder system.
Prior art there is no design, manufactures the achievement with the station boiler of supercritical steam conditions using anthracite or Low Volatile Lean Coal of 1000MW grade.
The station boiler that the thermal power station of prior art uses anthracite or Low Volatile Lean Coal also has the successful case using opposed firing, Terms of Corner Tangential Combustion, but low-load combustion-stabilizing poor-performing.
(3) summary of the invention:
Technical problem to be solved:
The burner of " W " flame combustion boiler is all arranged on the narrow vault of forward and backward wall, burner region wall thermic load is very high, lower hearth volume heat load is also very high, make the flame temperature level in district of lower hearth combustion centre very high, NOx generation amount exceeds more than one times than opposed firing combustion system.
The burner of " W " flame combustion boiler is all arranged on the narrow vault of forward and backward wall and becomes very difficult with mating of coal pulverizer, and when particularly part coal pulverizer is stopped transport, work burner is difficult to ensure along the uniformity of furnace chamber width and symmetry; In overcritical " W " flame combustion boiler startup process, the furnace side thermal deviation of lower hearth water screen tube increases, water circulation less reliable.
It is poor that the burner of " W " flame combustion boiler is all arranged in heat smoke backflow effeet on the narrow vault of forward and backward wall, wind, powder mix poor in early days, for controlling unburned carbon in flue dust, at lower hearth, large area wall with refractory lining, refracto is set with radiant heat firing coal-dust, great amount of fuel oil need be consumed in order to heat lower hearth large area wall with refractory lining, refracto at boiler startup and underload.
Solve the technical scheme that its technical problem adopts:
The present invention half " W " flame combustion supercritical power station boiler takes the diverse technology path with prior art, the novel furnace with the station boiler of supercritical steam conditions using anthracite or Low Volatile Lean Coal providing a kind of thermal power station to use.
The present invention half " W " flame combustion supercritical power station boiler comprises the lower hearth with face arch, rear arch; The weak vortex burner of each layout 2 row on lower hearth face arch, lower hearth rear arch; Often arrange weak vortex burner to be connected with a double-in and double-out ball mill; After lower hearth front wall, lower hearth, the position on the lower side of wall is respectively arranged that 1 row are two and is adjusted wind vortex burner; Often the two wind vortex burner of adjusting of row is connected with a double-in and double-out ball mill; After upper furnace front wall, upper furnace, 8m to 12m position bottom wall distance pendant superheater, is provided with 1 layer or 2 layers of separated secondary wind nozzle, and direct current wind and the Whirl deposite tank of the ejection of each separated secondary wind nozzle are adjustable respectively; The side towards the fire of forward and backward arch is provided with wall with refractory lining, refracto; Breeze airflow dense-and-weak separator is provided with in two tune wind vortex burner; Wall with refractory lining, refracto is provided with in the scope of the upper and lower each 2.5m of two tune wind vortex burner center line; Two tune wind vortex burner is for starting burner.
Owing to being arranged in weak vortex burner Jet with downward flow direction breeze airflow and the part Secondary Air of vault, upwards, " U " shape flame of front and back forms " W " flame to the turnover of its flame directive burner hearth center; Two wind vortex burners of adjusting in the portion on the lower side of horizontally disposed wall after lower hearth front wall, lower hearth form " T " flame, therefore the present invention is named half " W " flame combustion supercritical power station boiler.
The beneficial effect of the invention:
● the often row burner be connected with each double-in and double-out ball mill is all uniformly distributed along stove is wide, and the furnace side thermal deviation of lower hearth water screen tube significantly reduces, and start-up course water circulation reliability is significantly improved;
● burner region wall thermic load significantly declines, and heating power type and fuel type NOx generation amount significantly decline, and separated secondary wind suppresses NOx generate and effectively control unburned carbon in flue dust further;
● two tune wind vortex burner significantly improves heat smoke backflow effeet, and wind, powder mix improvement in early days, is easy to adopt few oil or without oily pulverized coal ignition technology;
● the First air pipeline that burner is connected with double-in and double-out ball mill is easy to arrange, uniformity, symmetry are significantly improved;
● compared with opposed firing, Terms of Corner Tangential Combustion, because there being the wall with refractory lining, refracto of sufficiently high lower hearth volume heat load and necessary amount, low-load combustion-stabilizing performance is significantly improved;
● simplify Secondary Air and tertiary air spout, bellows and baffle plate that the forward and backward wall paper of lower hearth puts, and create condition for air stage feeding low nitrogen burning;
● be easy to maximize, can be used for the station boiler with supercritical steam conditions using anthracite or Low Volatile Lean Coal designing, manufacture 1000MW grade.
(4) accompanying drawing illustrates:
Fig. 1 is the burner arrangement figure example one of half " W " flame combustion supercritical power station boiler.
Fig. 2 is the burner arrangement figure example two of half " W " flame combustion supercritical power station boiler.
In fig. 1 and 2:
1 pendant superheater, 2 upper furnace front walls,
Wall after 3 upper furnaces, 4 lower hearth face arch,
5 lower hearth rear arches, 6 lower hearth front walls,
Wall after 7 lower hearths, 8 separated secondary wind nozzles,
9 weak vortex burners, 10 pairs of tune wind vortex burners.
(5) detailed description of the invention:
Embodiment 1:
Existing composition graphs 1 is with a 1000MW grade, and the design load of Stream temperature degree/reheat steam temperature degree is the single reheat ∏ type supercritical power station boiler of 605 DEG C/613 DEG C is that example illustrates the preferred embodiment realizing invention.
The present invention half " W " flame combustion supercritical power station boiler comprises the lower hearth with face arch, rear arch; The weak vortex burner of each layout 2 row on lower hearth face arch, lower hearth rear arch; Often arrange and be made up of 8 weak vortex burners, wide uniform along stove; Often arrange weak vortex burner to be connected with a double-in and double-out ball mill; After lower hearth front wall, lower hearth, the position on the lower side of wall is respectively arranged that 1 row are two and is adjusted wind vortex burner; Often arrange and be made up of 8 two wind vortex burners of adjusting, wide uniform along stove; Often the two wind vortex burner of adjusting of row is connected with a double-in and double-out ball mill; After upper furnace front wall, upper furnace, 8m to 12m position bottom wall distance pendant superheater, is respectively arranged with 2 layers of separated secondary wind nozzle; Every layer is made up of 12 separated secondary wind nozzles, wide uniform along stove; Direct current wind and the Whirl deposite tank of the ejection of each separated secondary wind nozzle are adjustable respectively; The side towards the fire of face arch, rear arch is provided with wall with refractory lining, refracto; Breeze airflow dense-and-weak separator is provided with in two tune wind vortex burner; Wall with refractory lining, refracto is provided with in the scope of the upper and lower each 2.5m of two tune wind vortex burner center line; Two tune wind vortex burner is for starting burner.
Embodiment 2:
Existing composition graphs 2 is with a 1000MW grade, and the design load of Stream temperature degree/reheat steam temperature degree is the single reheat ∏ type supercritical power station boiler of 605 DEG C/613 DEG C is that example illustrates the preferred embodiment realizing invention.
The present invention half " W " flame combustion supercritical power station boiler comprises the lower hearth with face arch, rear arch; The weak vortex burner of each layout 2 row on lower hearth face arch, lower hearth rear arch; Often arrange and be made up of 8 weak vortex burners, wide uniform along stove; Often arrange weak vortex burner to be connected with a double-in and double-out ball mill; After lower hearth front wall, lower hearth, the position on the lower side of wall is respectively arranged that 1 row are two and is adjusted wind vortex burner; Often arrange and be made up of 8 two wind vortex burners of adjusting, wide uniform along stove; Often the two wind vortex burner of adjusting of row is connected with a double-in and double-out ball mill; After upper furnace front wall, upper furnace, 8m to 12m position bottom wall distance pendant superheater, is respectively arranged with 2 layers of separated secondary wind nozzle; Every layer is made up of 12 separated secondary wind nozzles, wide uniform along stove; Direct current wind and the Whirl deposite tank of the ejection of each separated secondary wind nozzle are adjustable respectively; The side towards the fire of face arch, rear arch is provided with wall with refractory lining, refracto; Breeze airflow dense-and-weak separator is provided with in two tune wind vortex burner; Wall with refractory lining, refracto is provided with in the scope of the upper and lower each 2.5m of two tune wind vortex burner center line; Two tune wind vortex burner is for starting burner.
Comparison diagram 2 and Fig. 1 both difference visible: in embodiment 1, the face arch of lower hearth, rear arch are the clinoplain horizontal by 15 ° of angles of cut, and the 2 row center lines of weak vortex burner that face arch, rear arch are respectively arranged and the angle of cut of vertical line are also all 15 ° of angles of cut; In embodiment 2, the face arch of lower hearth, rear arch are respectively by the clinoplain horizontal by 15 ° of angles of cut with form horizontal by the clinoplain of 50 ° of angles of cut, the center line of the weak vortex burner at nearly burner hearth center and the angle of cut of vertical line are 15 °, and the center line of the weak vortex burner in outside and the angle of cut of vertical line are 50 °.Embodiment 2, compared with embodiment 1, reduce further burner region wall thermic load, pulls open the centreline spacing of the weak vortex burner of 2 row, and improvement 2 arranges in weak vortex burner, rear journey wind, powder mixed effect.
Claims (1)
1. half " W " flame combustion supercritical power station boiler, is characterized in that: comprise the lower hearth with face arch, rear arch; The weak vortex burner of each layout 2 row on lower hearth face arch, lower hearth rear arch; Often arrange weak vortex burner to be connected with a double-in and double-out ball mill; After lower hearth front wall, lower hearth, the position on the lower side of wall is respectively arranged that 1 row are two and is adjusted wind vortex burner; Often the two wind vortex burner of adjusting of row is connected with a double-in and double-out ball mill; After upper furnace front wall, upper furnace, 8m to 12m position bottom wall distance pendant superheater, is provided with 1 layer or 2 layers of separated secondary wind nozzle, and direct current wind and the Whirl deposite tank of the ejection of each separated secondary wind nozzle are adjustable respectively; The side towards the fire of forward and backward arch is provided with wall with refractory lining, refracto; Breeze airflow dense-and-weak separator is provided with in two tune wind vortex burner; Wall with refractory lining, refracto is provided with in the scope of the upper and lower each 2.5m of two tune wind vortex burner center line; Two tune wind vortex burner is for starting burner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310067292.6A CN103115353B (en) | 2013-03-04 | 2013-03-04 | Half-W-shaped flame burning supercritical power station boiler |
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| CN201310067292.6A CN103115353B (en) | 2013-03-04 | 2013-03-04 | Half-W-shaped flame burning supercritical power station boiler |
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| CN103115353A CN103115353A (en) | 2013-05-22 |
| CN103115353B true CN103115353B (en) | 2015-06-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132322A (en) * | 2014-08-04 | 2014-11-05 | 章礼道 | Semi-W flame combustion subcritical steam pocket furnace |
| CN104296129B (en) * | 2014-10-15 | 2016-08-24 | 宁波大学 | A kind of W type flame boiler of symmetrical combustion |
| CN106179685A (en) * | 2016-08-31 | 2016-12-07 | 哈尔滨锅炉厂有限责任公司 | The fan mill arrangement system of tower 350MW super critical boiler and method for arranging |
| CN106196135A (en) * | 2016-08-31 | 2016-12-07 | 哈尔滨锅炉厂有限责任公司 | The fan mill arrangement system of π type 350MW super critical boiler and method for arranging |
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| GB980818A (en) * | 1961-12-13 | 1965-01-20 | Combustion Eng | Method and apparatus for generating vapor |
| EP1752707A2 (en) * | 2005-03-10 | 2007-02-14 | Mitsui Babcock Energy Limited | Supercritical Downshot Boiler |
| CN101666491A (en) * | 2009-10-30 | 2010-03-10 | 哈尔滨工业大学 | W-flame boiler with extended-range secondary air nozzles |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297421A (en) * | 2011-06-27 | 2011-12-28 | 中国科学院过程工程研究所 | W-type flame decoupling combustion furnace and decoupling combustion method |
| CN202613409U (en) * | 2012-06-08 | 2012-12-19 | 哈尔滨锅炉厂有限责任公司 | 350 MW supercritical W-flame anthracite boiler |
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2013
- 2013-03-04 CN CN201310067292.6A patent/CN103115353B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB980818A (en) * | 1961-12-13 | 1965-01-20 | Combustion Eng | Method and apparatus for generating vapor |
| EP1752707A2 (en) * | 2005-03-10 | 2007-02-14 | Mitsui Babcock Energy Limited | Supercritical Downshot Boiler |
| CN101666491A (en) * | 2009-10-30 | 2010-03-10 | 哈尔滨工业大学 | W-flame boiler with extended-range secondary air nozzles |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297421A (en) * | 2011-06-27 | 2011-12-28 | 中国科学院过程工程研究所 | W-type flame decoupling combustion furnace and decoupling combustion method |
| CN202613409U (en) * | 2012-06-08 | 2012-12-19 | 哈尔滨锅炉厂有限责任公司 | 350 MW supercritical W-flame anthracite boiler |
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