CN209744415U - double-U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device - Google Patents
double-U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device Download PDFInfo
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- CN209744415U CN209744415U CN201920328286.4U CN201920328286U CN209744415U CN 209744415 U CN209744415 U CN 209744415U CN 201920328286 U CN201920328286 U CN 201920328286U CN 209744415 U CN209744415 U CN 209744415U
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- tertiary air
- boiler
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 11
- 238000007599 discharging Methods 0.000 title abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 25
- 239000003245 coal Substances 0.000 claims description 16
- 238000010079 rubber tapping Methods 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Abstract
The utility model provides a low-nitrogen combustion device of a double-U-shaped flame liquid slag-discharging coal-fired power station boiler, which is characterized by comprising an air box; the boiler of the tertiary air first nozzle is arranged in the middle of the combustion chamber, and the tertiary air first nozzle is connected with the air box through a tertiary air first air channel; the third air second nozzle is arranged at the rear part of the slag catching screen and is connected with the air box through a third air second air channel; the third tertiary air nozzle is arranged at the rear part of the slag catching screen and is positioned above the second tertiary air nozzle, and the third tertiary air nozzle is connected with the air box through a third tertiary air channel; the combustor is arranged at the top of the boiler and is connected with the air box through a secondary air duct; and air volume adjusting devices are arranged on the secondary air duct, the tertiary air first air duct, the tertiary air second air duct and the tertiary air third air duct.
Description
Technical Field
The utility model belongs to the technical field of boiler monitoring devices, in particular to two U type slag liquid flow characteristic monitoring devices of slag tap boiler.
background
At present, few double-U-shaped flame liquid slag removal power station pulverized coal boilers are in China, only two double-U-shaped flame liquid slag removal power station pulverized coal boilers are in operation in China, so that related researches on the double-U-shaped flame liquid slag removal power station pulverized coal boilers in China are not abundant, the technology accumulation is less, and the low-nitrogen combustion technology of the double-U-shaped flame liquid slag removal power station pulverized coal boilers is greatly different from that of coal-fired boilers in other forms. Meanwhile, due to the characteristic of slag tapping, the method has great significance for solving the difficult problem of high-alkali coal combustion in China, so that the research on the low-nitrogen combustion technology of the pulverized coal boiler of the double-U-shaped flame slag tapping power station is necessary.
The core idea of the boiler of the coal-fired generator set at the present stage is that a tertiary air system is added at a certain distance from the downstream of a main combustion area to reduce air in the main combustion area, and part of air required by pulverized coal combustion is sent into a hearth from the tertiary air system, so that the pulverized coal is subjected to anoxic combustion in the main combustion area, and the purpose of inhibiting generation of nitrogen oxides is achieved. However, the double-U pulverized coal boiler with liquid slag discharge needs to have a high enough furnace temperature to ensure that the coal slag reaches a molten state, thereby achieving the purpose of liquid slag discharge. Therefore, when the double U-shaped pulverized coal boiler with liquid slag removal is used to reduce the oxygen content in the main combustion area, it is necessary to ensure that the furnace temperature is maintained at a high temperature under each load, and in order to ensure that the furnace temperature is kept as constant as possible during air classification, it is necessary to finely adjust the distribution of oxygen content from the late stage of combustion to the burnout area. Meanwhile, when air classification is carried out, because the temperature of the hearth is higher, a large amount of carbon monoxide is easily generated when the oxygen content in a combustion area is reduced.
SUMMERY OF THE UTILITY MODEL
the utility model aims at realizing the optimal design of the air inlet position and the air duct structure, and reducing the concentration of carbon monoxide in flue gas by strengthening staged combustion in a double-U-shaped flame liquid slag-discharging coal-fired power station boiler.
The utility model provides a technical scheme is:
A double U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device comprises
An air box;
The boiler of the tertiary air first nozzle is arranged in the middle of the combustion chamber, and the tertiary air first nozzle is connected with the air box through a tertiary air first air channel;
The third air second nozzle is arranged at the rear part of the slag catching screen and is connected with the air box through a third air second air channel;
the third tertiary air nozzle is arranged at the rear part of the slag catching screen and is positioned above the second tertiary air nozzle, and the third tertiary air nozzle is connected with the air box through a third tertiary air channel;
the combustor is arranged at the top of the boiler and is connected with the air box through a secondary air duct;
And air volume adjusting devices are arranged on the secondary air duct, the tertiary air first air duct, the tertiary air second air duct and the tertiary air third air duct.
preferably, an air preheater is arranged at the front end of the air box.
The utility model has the advantages that: the utility model provides a two U type flame liquid row sediment coal fired power plant boiler low nitrogen burner through specific air inlet spout position design to and set up air regulation device, can adjust the oxygen content in burn-out region, guarantee that the buggy has burnt out in this position, thereby restrain the carbon monoxide production in the flue gas.
Drawings
FIG. 1 is the general structure schematic diagram of the low-nitrogen combustion device of the double-U-shaped flame liquid slag-discharging coal-fired power station boiler of the utility model.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in FIG. 1, the utility model provides a two U type flame slag tapping coal fired power plant boiler low nitrogen combustion device, including setting up the first spout 111 of tertiary air, tertiary air second spout 112, tertiary air third spout 113 on two U type flame slag tapping coal fired power plant boilers.
The tertiary air first nozzle 111 is arranged in the middle of the combustion chamber, the tertiary air second nozzle 112 is positioned at the rear part of the slag catching screen 120, and the tertiary air third nozzle 113 is positioned at the rear part of the slag catching screen 120 and is arranged above the position of the tertiary air second nozzle 112.
The top of the double U-shaped flame liquid slag discharging coal-fired power plant boiler is provided with a burner 130, a wind box 150 is arranged outside the boiler, the wind box 150 is connected with the burner 130 through a secondary air duct 160, and air required for combustion is provided for the burner 130 through the wind box 150. The wind box 150 is connected with the tertiary air first nozzle 111 through the tertiary air first air duct 171, is connected with the tertiary air second nozzle 112 through the tertiary air second air duct 172, is connected with the tertiary air third nozzle 113 through the tertiary air third air duct 173, and sends air into the boiler combustion chamber through the tertiary air first nozzle 111, the tertiary air second nozzle 112 and the tertiary air third nozzle 113 through the wind box 150.
An air preheater 180 is disposed at the front end of the air box 150 to increase the temperature of the intake air.
air volume adjusting devices are arranged on the secondary air duct 160, the tertiary air first duct 171, the tertiary air second duct 172 and the tertiary air third duct 173 and are used for adjusting the air volume flowing into the boiler combustion chamber through the burner 130, the tertiary air first nozzle 111, the tertiary air second nozzle 112 and the tertiary air third nozzle 113. The air quantity of each nozzle can be adjusted in real time according to the operation condition of the boiler, and the temperature of a hearth and the generation of carbon monoxide are guaranteed while the air of the boiler is strengthened in a grading manner.
The utility model discloses an adjust the air regulation device in overgrate air wind channel 160 and combustor 130 and reduce combustion area oxygen volume, adjust the first wind channel 171 of tertiary air, the first spout 111 of tertiary air in good time and get into furnace's the amount of wind, guarantee the furnace temperature. Meanwhile, the oxygen amount of the burnout area is adjusted by adjusting the air volume adjusting devices arranged on the tertiary air third air channel 173, the tertiary air second air channel 172, the tertiary air third nozzle 113 and the tertiary air second nozzle 112, so that the pulverized coal is burnt out at the position, and carbon monoxide in the flue gas is inhibited. By the method, the oxygen distribution from the later combustion stage to the burnout area can be finely adjusted, the temperature of the hearth of the double-U-shaped flame liquid slag removal coal-fired power station boiler is maintained at a higher level when deep air classification is carried out, and the concentration of carbon monoxide in the flue gas is at a lower level.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (2)
1. The utility model provides a two U type flame slag tapping coal fired power plant boiler low-nitrogen combustion device which characterized in that includes:
An air box;
The boiler of the tertiary air first nozzle is arranged in the middle of the combustion chamber, and the tertiary air first nozzle is connected with the air box through a tertiary air first air channel;
the third air second nozzle is arranged at the rear part of the slag catching screen and is connected with the air box through a third air second air channel;
the third tertiary air nozzle is arranged at the rear part of the slag catching screen and is positioned above the second tertiary air nozzle, and the third tertiary air nozzle is connected with the air box through a third tertiary air channel;
The combustor is arranged at the top of the boiler and is connected with the air box through a secondary air duct;
and air volume adjusting devices are arranged on the secondary air duct, the tertiary air first air duct, the tertiary air second air duct and the tertiary air third air duct.
2. The low-nitrogen combustion device of a double-U-shaped flame liquid residue discharge coal-fired utility boiler according to claim 1, wherein an air preheater is provided at a front end of the windbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920328286.4U CN209744415U (en) | 2019-03-15 | 2019-03-15 | double-U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920328286.4U CN209744415U (en) | 2019-03-15 | 2019-03-15 | double-U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209744415U true CN209744415U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920328286.4U Active CN209744415U (en) | 2019-03-15 | 2019-03-15 | double-U-shaped flame liquid slag-discharging coal-fired power station boiler low-nitrogen combustion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN209744415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944331A (en) * | 2021-02-03 | 2021-06-11 | 上海锅炉厂有限公司 | Liquid-state slag discharging transformation method of solid-state slag discharging coal-fired boiler |
-
2019
- 2019-03-15 CN CN201920328286.4U patent/CN209744415U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944331A (en) * | 2021-02-03 | 2021-06-11 | 上海锅炉厂有限公司 | Liquid-state slag discharging transformation method of solid-state slag discharging coal-fired boiler |
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