CN220417288U - Bypass heating boiler water supply system of air preheater - Google Patents
Bypass heating boiler water supply system of air preheater Download PDFInfo
- Publication number
- CN220417288U CN220417288U CN202321276170.3U CN202321276170U CN220417288U CN 220417288 U CN220417288 U CN 220417288U CN 202321276170 U CN202321276170 U CN 202321276170U CN 220417288 U CN220417288 U CN 220417288U
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- CN
- China
- Prior art keywords
- heat exchanger
- air preheater
- water supply
- boiler
- flue gas
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 239000003546 flue gas Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 8
- 238000000605 extraction Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses an air preheater bypass heating boiler water supply system, which comprises a boiler (1), wherein an economizer (2) is arranged on the boiler (1), the output end of the boiler (1) is divided into two paths, one path is connected with a heat exchanger (4), and the other end is connected with an air preheater (3); the water supply line of the water supply pump is divided into two paths, one path is converged with the output end of the heat exchanger (4) and then is connected with the economizer (2), and the other path is connected with the input end of the heat exchanger (4) through a pipeline. The utility model has the characteristics of simple system reconstruction, easy operation and remarkable energy-saving effect.
Description
Technical Field
The utility model relates to the technical field of coal-fired units, in particular to a water supply system of an air preheater bypass heating boiler.
Background
The existing boiler with low water consumption and high volatile coal consumption and the oversized heating surface of the air preheater is designed, more cold air is doped, the boiler is limited by the drying output of a powder control system, and the exhaust temperature of the boiler is high, so that the economic operation of the boiler is not facilitated.
Individual pithead power plants are limited by coal sources, the burnt coal has high volatile components and low moisture, a large amount of cold air needs to be mixed and burned in the actual running process of the boiler, the air preheater has poor heat exchange effect, and the exhaust gas temperature is high.
At present, most of power generation enterprises with high smoke exhaust temperature are utilized in China, a mode of arranging a low-temperature economizer behind a tail flue air preheater is adopted to heat low-pressure condensate to recycle smoke exhaust waste heat, and although the smoke temperature is low, only low-pressure extraction steam is displaced, and most of recycled smoke waste heat is lost in a form of cold end loss, so that the energy-saving effect is limited.
Disclosure of Invention
In order to overcome the technical problems, the utility model aims to provide the bypass heating boiler water supply system of the air preheater, which has the characteristics of simple system transformation, easy operation and obvious energy-saving effect.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the bypass heating boiler water supply system of the air preheater comprises a boiler 1, wherein an economizer 2 is arranged on the boiler 1, the output end of the boiler 1 is divided into two paths, one path is connected with flue gas and a heat exchanger 4, and the other end is connected with the air preheater 3; the water supply line of the water supply pump is divided into two paths, one path is converged with the output end of the heat exchanger 4 and then is connected with the economizer 2, and the other path is connected with the input end of the heat exchanger 4 through a pipeline.
The flue gas output end of the heat exchanger 4 is provided with a flue gas baffle 9 at the outlet of the flue gas heat exchanger.
And a pipeline collected by an incoming water line of the water feed pump and the output end of the heat exchanger 4 is provided with a No. 1 high-pressure heater 5 and a No. 2 high-pressure heater 6.
And a pipeline for connecting incoming water of the water feed pump with the input end of the heat exchanger 4 is provided with a heat exchanger water inlet electric door 11.
And the output end of the heat exchanger 4 is provided with a heat exchanger water outlet electric door 12.
The connection part of the boiler 1 and the heat exchanger 4 is provided with a flue gas heat exchanger inlet baffle 7 and a flue gas heat exchanger inlet adjusting baffle 8.
The utility model has the beneficial effects of.
According to the utility model, a part of high-temperature flue gas heat is released in advance, the temperature of the hot primary air at the outlet of the air preheater is reduced, and a large amount of cold air is not required to be mixed for the coal pulverizing system for burning low-moisture coal, so that the exhaust gas temperature can be reduced, and the running economy of a unit is improved.
Compared with the traditional flue gas waste heat heating condensation water, the heat source is used for taking the flue gas at the inlet of the high-temperature air preheater, so that the heat exchange temperature difference is larger, and the heat transfer efficiency is higher. The system is used for exhausting high-pressure steam extraction of the steam turbine, and improves the economy of unit circulation.
The high-temperature flue gas flow rate of the system can be adjusted according to the load, so that the drying output of the coal mill is ensured when the coal types are changed.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
Description of the drawings:
1. boiler, 2 economizer, 3 air preheater, 4 heat exchanger, no. 5.1 high-pressure heater, 6.2 high-pressure heater, 7 flue gas heat exchanger import baffle, 8 flue gas heat exchanger import regulating baffle, 9 flue gas heat exchanger export flue gas baffle, 10 feedwater to high-pressure heater electric door, 11 heat exchanger water inlet electric door, 12 heat exchanger water outlet electric door
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1: the bypass heating boiler water supply system of the air preheater comprises a boiler 1, wherein an economizer 2 is arranged on the boiler 1, the output end of the boiler 1 is divided into two paths, one path is connected with flue gas and a heat exchanger 4, and the other end is connected with the air preheater 3; the water supply line of the water supply pump is divided into two paths, one path is converged with the output end of the heat exchanger 4 and then is connected with the economizer 2, and the other path is connected with the input end of the heat exchanger 4 through a pipeline.
The gas output end of the heat exchanger 4 is provided with a flue gas baffle 9 at the outlet of the flue gas heat exchanger.
And a pipeline collected by an incoming water line of the water feed pump and the output end of the heat exchanger 4 is provided with a No. 1 high-pressure heater 5 and a No. 2 high-pressure heater 6.
And a pipeline for connecting incoming water of the water feed pump with the input end of the heat exchanger 4 is provided with a heat exchanger water inlet electric door 11.
And the output end of the heat exchanger 4 is provided with a heat exchanger water outlet electric door 12.
The connection part of the boiler 1 and the heat exchanger 4 is provided with a flue gas heat exchanger inlet baffle 7 and a flue gas heat exchanger inlet adjusting baffle 8.
The working principle of the utility model is as follows:
1. when the low-moisture coal is burned, a large amount of cold air is not needed to be mixed, and the exhaust gas temperature is reduced.
The high-temperature flue gas of the boiler enters the heat exchanger 4 through the inlet baffle 7 of the flue gas heat exchanger and the inlet adjusting baffle 8 of the flue gas heat exchanger, and exchanges heat with the water fed by the machine without passing through a high-pressure heater, so that the water feeding temperature is increased. The heat-exchanged flue gas enters a flue gas side outlet of the air preheater 3 through a flue gas baffle 9 at an outlet of the flue gas heat exchanger, and is discharged into the atmosphere under the action of a draught fan.
2. The system is used for exhausting high-pressure steam extraction of the steam turbine, and improves the economy of unit circulation. The water supply enters the heat exchanger 4 through the heat exchanger water inlet electric door 11, absorbs heat and heats, then flows back to the high-pressure heater through the heat exchanger water outlet electric door 12, the high-pressure water supply after heating can reduce the high-pressure extraction of the steam turbine, the part of steam can continuously do work in the steam turbine, and compared with the traditional mode of exhausting and extruding the low-pressure extraction, the economical efficiency is improved.
Claims (6)
1. The bypass heating boiler water supply system of the air preheater is characterized by comprising a boiler (1), wherein an economizer (2) is arranged on the boiler (1), the output end of the boiler (1) is divided into two paths, one path is connected with a heat exchanger (4), and the other end is connected with the air preheater (3); the water supply line of the water supply pump is divided into two paths, one path is converged with the output end of the heat exchanger (4) and then is connected with the economizer (2), and the other path is connected with the input end of the heat exchanger (4) through a pipeline.
2. An air preheater bypass-heating boiler feed water system according to claim 1, characterized in that the gas output end of said heat exchanger (4) is provided with a flue gas heat exchanger outlet flue gas baffle (9).
3. An air preheater bypass heating boiler water supply system according to claim 1, characterized in that a number 1 high pressure heater (5) and a number 2 high pressure heater (6) are arranged on a pipeline where the water supply line of the water supply pump and the output end of the heat exchanger (4) are converged.
4. An air preheater bypass heating boiler feed water system according to claim 1, characterized in that a heat exchanger feed water electrically operated gate (11) is arranged on the pipeline of the feed water pump connecting the input end of the heat exchanger (4).
5. An air preheater bypass heating boiler feed water system according to claim 1, characterized in that a heat exchanger outlet electric door (12) is arranged at the output end of the heat exchanger (4).
6. An air preheater bypass-heating boiler feed water system according to claim 1, characterized in that a flue gas heat exchanger inlet baffle (7) and a flue gas heat exchanger inlet adjusting baffle (8) are arranged at the connection of the boiler (1) and the heat exchanger (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321276170.3U CN220417288U (en) | 2023-05-24 | 2023-05-24 | Bypass heating boiler water supply system of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321276170.3U CN220417288U (en) | 2023-05-24 | 2023-05-24 | Bypass heating boiler water supply system of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220417288U true CN220417288U (en) | 2024-01-30 |
Family
ID=89656435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321276170.3U Active CN220417288U (en) | 2023-05-24 | 2023-05-24 | Bypass heating boiler water supply system of air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220417288U (en) |
-
2023
- 2023-05-24 CN CN202321276170.3U patent/CN220417288U/en active Active
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