CN107131496B - Split type burner structure and split method of power station boiler - Google Patents
Split type burner structure and split method of power station boiler Download PDFInfo
- Publication number
- CN107131496B CN107131496B CN201710223326.4A CN201710223326A CN107131496B CN 107131496 B CN107131496 B CN 107131496B CN 201710223326 A CN201710223326 A CN 201710223326A CN 107131496 B CN107131496 B CN 107131496B
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- Prior art keywords
- split
- combustion
- burner
- tertiary air
- boiler
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 239000003245 coal Substances 0.000 claims abstract description 15
- 239000003034 coal gas Substances 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 claims 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 2
- 238000010304 firing Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
Abstract
The invention discloses a split type burner structure of a power station boiler and a split method. The invention firstly solves the problems of the combustion stability and the economy of the boiler. Through a great deal of research and calculation by the applicant, the current independent tertiary air nozzle is found, and the existing independent tertiary air nozzle is difficult to burn completely due to the fact that the pulverized coal content is low, the temperature is low, the wind speed is high (50-55 m/s), and the arrangement position is far away from the place with high temperature of the combustion center of the hearth. And the combustion stability of the furnace is greatly influenced due to the poor combustion effect of tertiary air. On the other hand, the coal gas is easy to catch fire due to low ignition temperature, and has good combustion stabilizing effect on the boiler. Therefore, if the advantage of easy combustion of the gas can be utilized as a stable combustion source of the tertiary air, the defect of combustion of the tertiary air can be overcome, and the better combustion effect of the tertiary air can be achieved, so that the combustion stability and the economy of the boiler are integrally improved.
Description
Technical Field
The invention relates to a split type burner structure and a split method of a power station boiler, belonging to the field of boiler combustion and design.
Background
The combustion principle of the boiler with tangential circles at the four corners of the power station is that the airflow of the burner at the four corners of the hearth tangentially rotates in the hearth to form a stable combustion tangential circle. The fire side of the burner is the side close to the center of the hearth in the air flow direction, and the side close to the furnace wall is the back fire side.
The main burner type of the prior utility boiler is mainly a pulverized coal nozzle, the nozzle containing pulverized coal can be divided into a primary air nozzle and a tertiary air nozzle according to different pulverized coal concentrations, and the nozzle of hot air (350-370 ℃) without pulverized coal is called secondary air. The primary air nozzle has high pulverized coal concentration and is generally called as a pulverized coal burner; the tertiary air is the exhaust gas of powder making, and contains about 10% of coal dust in the total amount, which is generally called tertiary air nozzle.
The tertiary air is characterized by low pulverized coal content, finer pulverized coal, low temperature (80-90 ℃) and difficult ignition and combustion, and is generally arranged at the uppermost layer of the boiler burner group.
The steelmaking process can produce a large amount of blast furnace gas, and the blast furnace gas is characterized by lower heat value, but is easy to catch fire due to the characteristics of a gas medium.
The blast furnace gas is used as the blended fuel in the utility boiler and mainly plays a role in stabilizing combustion, and is generally used as an independent nozzle or is arranged in a secondary air nozzle at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a burner design method and a burner design structure capable of improving the combustion stability and economy of a boiler, and overcoming the defects of the prior art.
The technical scheme of the invention is as follows: the utility model provides a split type burner structure of power plant boiler, includes coal gas spout, split type burner, tertiary air spout, baffle, furnace, split type burner inside has a baffle, splits split type burner into coal gas spout and tertiary air spout; the installation position of the split burner is tangential to the center of the hearth.
The number of the divided type burners is 4.
The partition board (4) is connected with the inner wall of the split burner in a welding mode.
The segmentation method comprises the following steps: the split burner adopts a coal gas and tertiary air split burner structure, the split burner adopts vertical split, the fire side of the split burner is a coal gas nozzle, and the back fire side of the split burner is a tertiary air nozzle; the hearth is in a tangential combustion mode, and the split type burner is positioned on the upper layer of the hearth combustion group.
The tertiary air nozzle can be replaced by primary air pulverized coal or secondary air.
The tangential firing is positioned in the center of the hearth, and four pulverized coal burners positioned in the center of the hearth form a quadrangle tangential; the opposite firing is positioned at two sides of the hearth, and each side can be provided with one or two groups of symmetrical pulverized coal burners.
The burner type of the invention makes full use of the characteristic of the burning mode of the die-cut circles. Because tangential firing is located at the center of the hearth, pulverized coal airflow with high rigidity and high penetrating power is needed to meet the requirement of tangential firing quantity, and stable tangential firing is formed at the center of the hearth. Opposite firing is located on two sides of the hearth, far from the firing center of the hearth, the static stable firing capability of a single burner needs to be improved, and stable firing support is provided for dynamic tangential firing in the center of the hearth, so that the whole firing of the hearth is maintained.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the combustion of a burner within a boiler;
the marks in the figure are as follows: 1. the device comprises a gas nozzle, a 2-part burner, a 3-part tertiary air nozzle, a 4-part baffle, a 5-part hearth.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment of the invention comprises the following steps: as shown in fig. 1, a split burner structure of a utility boiler comprises a gas nozzle 1, a split burner 2, a tertiary air nozzle 3, a partition plate 4 and a hearth 5, wherein the partition plate 4 is arranged in the split burner 2 to divide the split burner 2 into the gas nozzle 1 and the tertiary air nozzle 3; the installation position of the split burner 2 is tangential to the center of the hearth 5.
The number of the divided type burners 2 is 4 in total.
The partition board 4 is connected with the inner wall of the split burner 2 in a welding mode.
The method for dividing the gas burner comprises the steps that a gas and tertiary air dividing type burner structure is adopted by a dividing type burner 2, vertical and vertical division is adopted by the dividing type burner 2, a gas nozzle 1 is arranged on the fire side of the dividing type burner, and a tertiary air nozzle 3 is arranged on the back fire side of the dividing type burner; the hearth is in a tangential combustion mode, and the split burner 2 is positioned at the upper layer of the combustion group of the hearth 1.
The tertiary air nozzle 3 can be replaced by primary air pulverized coal or secondary air.
Fig. 1 is a gas and tertiary air split burner. The specific method is that the split type burner (2) adopts vertical and vertical split, and the split areas of the gas nozzle 1 part and the tertiary air nozzle 3 part are based on the design wind speed of tertiary air and gas.
Fig. 2 is a schematic diagram of the combustion of a burner in a boiler, wherein the gas is arranged on the fire-facing side and the tertiary air is arranged on the back fire side. The combustion tangential circle is positioned at the center of the hearth (5), and a four-corner tangential circle combustion technology is formed by four gas and tertiary air split type burners (2) positioned at the center of the hearth.
Claims (4)
1. A method for partitioning a partitioned burner structure of a utility boiler, the partitioned burner (2) comprising a gas nozzle (1), a tertiary air nozzle (3) and a partition (4); the method is characterized in that: the inside of the split type burner (2) is provided with a partition plate (4) for dividing the split type burner (2) into a gas nozzle (1) and a tertiary air nozzle (3); the installation position of the split burner (2) is tangential to the center of the hearth (5); the segmentation method comprises the following steps: the split type burner (2) adopts a coal gas and tertiary air split type burner structure, the split type burner (2) adopts vertical split, a fire side of the split type burner is a coal gas nozzle (1), and a back fire side of the split type burner is a tertiary air nozzle (3); the hearth is in a tangential combustion mode, and the split type burner (2) is positioned at the upper layer of the combustion group of the hearth (5).
2. The method for partitioning a split burner structure of a utility boiler as set forth in claim 1, wherein: the number of the divided type burners (2) is 4 in total.
3. The method for partitioning a split burner structure of a utility boiler as set forth in claim 1, wherein: the partition plate (4) is connected with the inner wall of the split burner (2) in a welding mode.
4. The method for partitioning a split burner structure of a utility boiler as set forth in claim 1, wherein: the tertiary air nozzle (3) can be replaced by primary air pulverized coal or secondary air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710223326.4A CN107131496B (en) | 2017-04-07 | 2017-04-07 | Split type burner structure and split method of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710223326.4A CN107131496B (en) | 2017-04-07 | 2017-04-07 | Split type burner structure and split method of power station boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107131496A CN107131496A (en) | 2017-09-05 |
| CN107131496B true CN107131496B (en) | 2023-10-27 |
Family
ID=59716463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710223326.4A Active CN107131496B (en) | 2017-04-07 | 2017-04-07 | Split type burner structure and split method of power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107131496B (en) |
Citations (16)
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|---|---|---|---|---|
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| CN2559889Y (en) * | 2002-08-21 | 2003-07-09 | 牛锦林 | Coal and gas integral clean combustion boiler |
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2017
- 2017-04-07 CN CN201710223326.4A patent/CN107131496B/en active Active
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| JP2005241107A (en) * | 2004-02-25 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | Biomass mixing and burning device and mixing and burning method |
| CN1789806A (en) * | 2004-12-13 | 2006-06-21 | 中国科学院过程工程研究所 | Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof |
| CN101122385A (en) * | 2006-08-10 | 2008-02-13 | 北京众恒力热能环保科技有限公司 | Coal, gas integral cleaning combustion boiler |
| CA2608054A1 (en) * | 2006-10-24 | 2008-04-24 | Air Products And Chemicals, Inc. | Pulverized solid fuel burner |
| CN1959205A (en) * | 2006-11-30 | 2007-05-09 | 上海交通大学 | Combustion method of anthracite coal |
| CN201041356Y (en) * | 2007-03-21 | 2008-03-26 | 鞍钢股份有限公司 | Coal dust gas dual-purpose boiler |
| CN201093503Y (en) * | 2007-08-01 | 2008-07-30 | 黄显宝 | Middle thermal value coal gas and powder dual-purpose combustor |
| CN102042614A (en) * | 2009-10-19 | 2011-05-04 | 章礼道 | Natural gas ignition system for coal burning boiler in generating plant |
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| CN103672862A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Low-nitrogen combustion device without primary air and secondary air, and application method |
| CN106090894A (en) * | 2016-08-23 | 2016-11-09 | 翼特新能源科技（上海）有限公司 | The all-oxygen combustion device of a kind of low NOx and combustion method thereof and application |
| CN207006124U (en) * | 2017-04-07 | 2018-02-13 | 贵州电网有限责任公司电力科学研究院 | A kind of Splittable burner structure of station boiler |
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| Publication number | Publication date |
|---|---|
| CN107131496A (en) | 2017-09-05 |
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