WO2011000136A1 - 一种低氮氧化物排放煤粉切向燃烧装置 - Google Patents
一种低氮氧化物排放煤粉切向燃烧装置 Download PDFInfo
- Publication number
- WO2011000136A1 WO2011000136A1 PCT/CN2009/001056 CN2009001056W WO2011000136A1 WO 2011000136 A1 WO2011000136 A1 WO 2011000136A1 CN 2009001056 W CN2009001056 W CN 2009001056W WO 2011000136 A1 WO2011000136 A1 WO 2011000136A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air nozzle
- burnout
- furnace
- center
- wall
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 26
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 46
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims 8
- 239000001272 nitrous oxide Substances 0.000 claims 3
- 238000005516 engineering process Methods 0.000 abstract description 18
- 239000007789 gas Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 13
- 239000003546 flue gas Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 240000004282 Grewia occidentalis Species 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910052778 Plutonium Inorganic materials 0.000 description 2
- 235000017899 Spathodea campanulata Nutrition 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent 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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
-
- 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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
Definitions
- the invention relates to a tangential combustion device for pulverized coal with low nitrogen oxide emission, belonging to the technical field of combustion devices. Background technique
- Nitrogen oxides are a class of gases that cause serious pollution in the atmospheric environment and are considered to be one of the main sources of atmospheric pollution. Nitrogen oxides emitted worldwide by burning fossil fuels each year account for a large proportion of all nitrogen oxide emissions. Increasingly stringent environmental regulations require research and development of advanced combustion technologies to reduce emissions of plutonium and other pollutants. At present, the biggest feature of China's energy composition is coal, which accounts for more than 70%. This will generate a large amount of nitrogen oxide gas. Therefore, such an energy structure will have a negative impact on economic growth and ecological environment.
- the technical measures for controlling the enthalpy emissions of conventional coal-fired power station boilers can be divided into two types: low-lying combustion technology and flue gas purification technology.
- Flue gas purification technology reduces the final emissions of plutonium by removing flue gas.
- the emission reduction of foreign thermal power plants is mainly achieved through advanced operation modes, low-lying combustion technology and tail flue gas denitration technology.
- the tail flue gas denitration technology is relatively thorough, but its investment and operation and maintenance costs are expensive.
- Advanced low-pressure combustion technology can reduce the emission concentration to 450 ⁇ 650mg/Nm : 'below, and as the amount of NOx generated in the furnace decreases, the operating cost of the tail denitration unit will also be reduced.
- staged combustion technology including air classification and fuel classification.
- Fuel classification technology is also known as fuel reburning (reduction N0) technology.
- reduction N0 fuel reburning
- the most widely used and most mature mainstream low NOx combustion technology at home and abroad is the air classification technology, which has been widely adopted in power station boilers in China.
- the reduction zone In the middle of the first and second combustion zones is a reduction zone with a reducing atmosphere with an oxygen concentration close to zero.
- the reduction medium in this zone has a significant effect on reducing the NOx formed.
- the overall air classification technology in the furnace can reduce the NOx production by 30% ⁇ 50%. The greater the degree of air classification, the greater the share of the burned-out wind and the greater the degree of NOx emission reduction.
- the object of the present invention is to optimize the design of the burnout wind, providing a pulverized coal tangentially burning device having low nitrogen oxide emissions, low fly ash carbon content and low furnace flue gas temperature deviation.
- the technical proposal of the present invention is to provide a tangential combustion device for pulverized coal with low nitrogen oxide emission, including a furnace, and a primary air nozzle and a secondary air nozzle disposed at opposite corners of the main combustion zone of the furnace.
- the axis of the primary air nozzle or the secondary air nozzle located on the same horizontal plane is cut into a circle centered on the center of the furnace, and is characterized in that: at least one burnout is provided on the four walls of the furnace above the primary air nozzle and the secondary air nozzle.
- each of the exhaust gas nozzle groups includes four burnout air nozzles, one on each wall of the furnace, and located at the same horizontal plane; the axes of the four groups of the same exhaust wind nozzles are cut into the furnace
- the center is an imaginary circle of the center of the circle.
- a burnout air nozzle group is disposed on the four walls of the furnace above the primary air nozzle and the secondary air nozzle, and the burnout air nozzle is disposed on the center line of each wall.
- Two burnout air nozzle groups are provided on the four walls of the furnace above the primary air nozzle and the secondary air nozzle, and the exhaust air nozzles in each group are arranged on the center line of each wall.
- a burnout air nozzle group is arranged on the four walls of the furnace above the primary air nozzle and the secondary air nozzle, and the burnout air nozzle is arranged on a vertical line deviating from the center line of each wall, and the axis of the burnout wind nozzle is cut off from An imaginary tangent circle having a diameter d equal to or less than 2/3 of the furnace width centered on the center of the hearth.
- burnout air nozzles on the four walls of the furnace above the primary air nozzle and the secondary air nozzle, one of which is arranged on the center line of each wall, and the other is arranged by the exhaust gas nozzle group.
- the axis of the burnout air nozzle is cut to an imaginary tangent circle having a diameter d centered on the center of the furnace center and less than or equal to 2/3 of the furnace width.
- Two burnout air nozzle groups are arranged on the side wall of the furnace above the primary air nozzle and the secondary air nozzle, and each of the burnout air nozzle groups is arranged on a vertical line deviating from the center line of each wall, wherein the burnout is completed
- the axis of the wind nozzle is cut to an imaginary tangent circle having a diameter d centered on the center of the furnace and having a width d of 2/3 or less.
- burnout air nozzle groups on the four walls of the furnace above the primary air nozzle and the secondary air nozzle, wherein two burnout air nozzle groups are arranged on the center line of each wall, and another burnout air nozzle group is arranged.
- the axis of the burnout air nozzle is cut to an imaginary tangent circle having a diameter d centered on the center of the furnace center and less than or equal to 2/3 of the furnace width.
- the distance between the center of the burnout air nozzle on each wall of the furnace and the center of the uppermost primary air nozzle and the uppermost row 5 ⁇ 1 ⁇
- the ratio of the distance from the center of the wind nozzle to the bottom of the screen is 0. 1 ⁇ 0. 5: 1.
- the ratio of the air quality passed by the burnout air nozzle (6) to the total air mass of the boiler is 10% - 30%.
- the present invention arranges separate burnout winds at a certain distance above the main burner arranged at the square corner, and the burnout air nozzles are not disposed on the four corners but on the four walls of the furnace.
- the present invention can enhance the turbulent mixing of the burned-out wind and the high-temperature flue gas while controlling the NOx emission, and enhance the burnout of the coke and the burn-up of the CO.
- the swirling intensity of the burning fireball can be adjusted, which is beneficial to control the flue gas velocity and temperature deviation at the exit of the furnace.
- the invention can realize low NOx emission and reduce NOx production amount based on the overall air classification technology in the currently used bituminous coal and lean coal furnace to control the NOx effect of 250 ⁇ 650mg/m :i (the concentration of flue gas oxygen is 6%). About 10%. It solves the problems of high fly ash combustibles, large flue gas velocity and temperature deviation at the furnace exit, and increases the operational regulation performance for different coal types and load changes.
- Figure 1 is a schematic view of a tangential combustion device for pulverized coal with low nitrogen oxide emissions
- Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
- Figure 3 is a cross-sectional view taken along line B-B of Figure 1;
- Figure 4 is a schematic view of another tangential combustion device for discharging pulverized coal with low nitrogen oxides
- Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
- Figure 6 is a cross-sectional view taken along line B-B of Figure 4.
- Fig. 1 it is a schematic diagram of a tangential combustion device for pulverized coal with low nitrogen oxide emission. It is suitable for the four-corner tangential coal-fired boiler in thermal power plant. According to the height of the furnace, the furnace is divided into main combustion according to the characteristics of the pulverized coal combustion area. Zone 1, Reduction Zone 2 and Burnout Zone 3.
- the main burner group is composed of a plurality of primary air nozzles 4 and a secondary air nozzle 5, which are arranged on the four corners of the furnace.
- the nozzle structure and arrangement are the same as those of the conventional four-corner tangential combustion system, as shown in FIG.
- the axis of the primary air nozzle 4/secondary air nozzle 5 is cut to an imaginary tangential circle centered on the center of the furnace, and the actual flow will form a swirling airflow in the furnace.
- the ratio of the air quality passed by the burnout air nozzle 6 to the total air mass of the boiler is 20%, as shown in FIG. 2,
- a cross-sectional view of a pulverized coal burning device with a low nitrogen oxide emission the device comprising two groups of burnout air nozzles, each of which is provided with two burnout air nozzles 6 arranged on the center line of each wall
- the axis is cut to an imaginary cut circle with a diameter of zero centered on the center of the hearth.
- the NOx reduction zone 2 is formed in the furnace height range between the main burner and the burnout air nozzle 6, and the burnout zone 3 is above the burnout wind.
- the wall-mounted exhaust gas nozzle has the function of manually adjusting the horizontal swing angle.
- the combustion adjustment adjusts the degree of the horizontal swing angle according to the operating conditions, the carbon content of the fly ash and the flue gas velocity and temperature deviation of the furnace outlet are controlled. .
- FIG. 4 it is another schematic diagram of the tangential combustion device for pulverized coal with low nitrogen oxide emission. It is suitable for the four-corner tangential coal-fired boiler in thermal power plant. According to the height of the furnace, the furnace is divided according to the characteristics of the pulverized coal combustion area. Burning zone 1, reduction zone 2 and burnout zone 3.
- the main burner group is composed of a plurality of primary air nozzles 4 and a secondary air nozzle 5, which are arranged on the four corners of the furnace.
- the nozzle structure and arrangement are the same as those of the conventional four-corner tangential combustion system, as shown in FIG.
- the axis of the primary air nozzle 4/secondary air nozzle 5 is cut to a circle centered on the center of the furnace, and the actual flow will form a swirling airflow in the furnace.
- the ratio of the air mass passing through the burnout air nozzle 6 to the total air mass of the boiler is 20%, as shown in FIG. 5, which is the AA cross-sectional view in FIG. 1, and the device includes three burnout air nozzle groups.
- Each wall is provided with three burnout air nozzles 6, two of which are arranged on the central vertical line of each wall, the axis of which is cut to an imaginary cut circle having a diameter of zero centered on the center of the hearth.
- the other nozzle is arranged on a vertical line deviating from the center line of each wall, and the axis of the corresponding nozzle on the axis of the other three walls is cut in the furnace by an imaginary circle with a diameter d of 5000 hidden.
- a NOx reduction zone 2 is formed in the furnace height range between the main burner and the burnout air nozzle, and a burnout zone 3 is above the burnout wind.
- the wall-mounted exhaust gas nozzle has the function of manually adjusting the horizontal swing angle.
- the combustion adjustment adjusts the degree of the horizontal swing angle according to the operating conditions, the carbon content of the fly ash and the flue gas velocity and temperature deviation of the furnace outlet are controlled. .
- Embodiment 2 The same as Embodiment 2, except that a burn-out air nozzle group is disposed on the four walls of the furnace above the primary air nozzle 4 and the secondary air nozzle 5, and the burn-out air nozzle 6 is disposed on the center line of each wall. Burnout nozzles on each wall of the furnace 6 The distance between the center of the uppermost primary air nozzle 4 and the center of the uppermost row of the air nozzles 4 is 0. 1 : 1. The ratio of the air quality passed by the burnout air nozzle 6 to the total air mass of the boiler is 10%.
- Embodiment 2 The same as Embodiment 2, except that a burn-out air nozzle group is disposed on the four walls of the furnace above the primary air nozzle 4 and the secondary air nozzle 5, and the burnout air nozzle 6 is arranged vertically from the center line of each wall.
- the axis of the burnout air nozzle 6 is cut to an imaginary tangent circle having a diameter d centered on the center of the hearth equal to 2/3 of the furnace width.
- the distance between the center of the burnout air nozzle 6 on each wall of the furnace and the center of the uppermost primary air nozzle 4 is 9000, and the ratio of the distance from the center of the uppermost primary air nozzle 4 to the bottom of the screen 7 is 18000 mm. 5 : 1.
- the ratio of the air quality passed by the burnout air nozzle 6 to the total air mass of the boiler is 30%.
- the difference is that two burnout air nozzle groups are arranged on the four walls of the furnace above the primary air nozzle 4 and the secondary air nozzle 5, and one of the burnout air nozzle groups is arranged at the center line of each wall. Above, another group of burnout air nozzles is arranged on a vertical line deviating from the center line of each wall, wherein the axis of the burnout air nozzle 6 is cut at a diameter d equal to the center of the hearth of the furnace center equal to 2/3 of the furnace width Imagine cutting the circle.
- the difference is that two burning air nozzle groups are arranged on the side wall of the furnace above the primary air nozzle 4 and the secondary air nozzle 5, and each of the burning air nozzle groups is arranged away from the center line of each wall.
- the axis of the burnout air nozzle 6 is cut to an imaginary tangent circle having a diameter d centered on the center of the hearth and having a width d of 2/3 or less.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2011/00735A ZA201100735B (en) | 2009-06-30 | 2011-01-28 | A pulverized coal tangential firing device of low nox emission |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910054141.0 | 2009-06-30 | ||
CN200910054141A CN101598333B (zh) | 2009-06-30 | 2009-06-30 | 一种低氮氧化物排放煤粉切向燃烧装置 |
Publications (1)
Publication Number | Publication Date |
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WO2011000136A1 true WO2011000136A1 (zh) | 2011-01-06 |
Family
ID=41419867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2009/001056 WO2011000136A1 (zh) | 2009-06-30 | 2009-09-21 | 一种低氮氧化物排放煤粉切向燃烧装置 |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN101598333B (zh) |
CL (1) | CL2011000200A1 (zh) |
TR (1) | TR201100804T1 (zh) |
WO (1) | WO2011000136A1 (zh) |
ZA (1) | ZA201100735B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104061567A (zh) * | 2014-03-28 | 2014-09-24 | 广东电网公司电力科学研究院 | 低氮改造大型电站锅炉装置及其使用方法 |
Families Citing this family (11)
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CN101737771B (zh) * | 2009-12-18 | 2012-02-01 | 上海锅炉厂有限公司 | 一种多级燃尽风布置方式 |
CN101986028B (zh) * | 2010-11-18 | 2012-04-04 | 浙江大学 | 低NOx的冷灰斗及炉底送风双椭圆布置的W型火焰锅炉 |
CN102012020B (zh) * | 2010-12-18 | 2013-05-08 | 华北电力大学(保定) | 一种水平摆动墙式切圆燃烧法及燃烧装置 |
CN102506419A (zh) * | 2011-09-30 | 2012-06-20 | 哈尔滨工业大学 | 一种墙式布置的两级燃尽风装置 |
CN102721043B (zh) * | 2012-07-10 | 2014-12-17 | 烟台龙源电力技术股份有限公司 | 具有附壁二次风和网格燃尽风的煤粉锅炉 |
CN102901209A (zh) * | 2012-10-31 | 2013-01-30 | 山西蓝天环保设备有限公司 | 大型煤粉燃烧热水锅炉 |
US9696030B2 (en) * | 2013-01-28 | 2017-07-04 | General Electric Technology Gmbh | Oxy-combustion coupled firing and recirculation system |
CN103206716B (zh) * | 2013-02-01 | 2015-10-07 | 西安热工研究院有限公司 | 多煤种适应型低NOx 燃烧系统 |
WO2014194855A1 (zh) * | 2013-06-08 | 2014-12-11 | 国家电网公司 | 一种适应于贫煤锅炉的低氮氧化物直流煤粉燃烧装置 |
CN106110863B (zh) * | 2016-08-08 | 2018-12-04 | 中昊黑元化工研究设计院有限公司 | 一种炭黑尾气锅炉脱硝方法 |
CN107620954B (zh) * | 2017-08-23 | 2019-07-12 | 清华大学 | 切圆煤粉燃烧锅炉炉内污染物排放控制方法 |
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- 2009-06-30 CN CN200910054141A patent/CN101598333B/zh active Active
- 2009-09-21 WO PCT/CN2009/001056 patent/WO2011000136A1/zh active Application Filing
- 2009-09-21 TR TR2011/00804T patent/TR201100804T1/xx unknown
-
2011
- 2011-01-28 ZA ZA2011/00735A patent/ZA201100735B/en unknown
- 2011-01-31 CL CL2011000200A patent/CL2011000200A1/es unknown
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US5146858A (en) * | 1989-10-03 | 1992-09-15 | Mitsubishi Jukogyo Kabushiki Kaisha | Boiler furnace combustion system |
JPH05215305A (ja) * | 1992-01-31 | 1993-08-24 | Mitsubishi Heavy Ind Ltd | 微粉固体燃料燃焼装置 |
JP2001227702A (ja) * | 2000-02-17 | 2001-08-24 | Mitsubishi Heavy Ind Ltd | 倒立型ボイラ装置 |
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CN104061567A (zh) * | 2014-03-28 | 2014-09-24 | 广东电网公司电力科学研究院 | 低氮改造大型电站锅炉装置及其使用方法 |
Also Published As
Publication number | Publication date |
---|---|
ZA201100735B (en) | 2012-03-28 |
CN101598333A (zh) | 2009-12-09 |
CN101598333B (zh) | 2012-09-26 |
TR201100804T1 (tr) | 2011-06-21 |
CL2011000200A1 (es) | 2011-08-19 |
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