CN215637273U - Flue gas waste heat recycling device of thermal power plant - Google Patents
Flue gas waste heat recycling device of thermal power plant Download PDFInfo
- Publication number
- CN215637273U CN215637273U CN202121562509.7U CN202121562509U CN215637273U CN 215637273 U CN215637273 U CN 215637273U CN 202121562509 U CN202121562509 U CN 202121562509U CN 215637273 U CN215637273 U CN 215637273U
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- Prior art keywords
- pipe
- flue gas
- heat
- waste heat
- recovery area
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Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000003546 flue gas Substances 0.000 title claims abstract description 43
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000011084 recovery Methods 0.000 claims abstract description 66
- 239000007921 spray Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a flue gas waste heat recycling device for a thermal power plant, and mainly relates to the field of flue gas recycling equipment. The flue gas waste heat recycling device for the thermal power plant comprises a base, a waste heat recovery area, a flue gas discharge pipe and air exhaust equipment, wherein the waste heat recovery area is arranged on the base, the flue gas discharge pipe is arranged at the top of the waste heat recovery area, the waste heat recovery area comprises a heat conduction inner tube and a recovery area outer wall, the bottom of the heat conduction inner tube is fixedly connected in the base, the recovery area outer wall is fixedly installed on the base, the heat conduction inner tube and the recovery area outer wall are heat recovery cavities, a heat exchange spiral tube is arranged in the heat conduction inner tube, the outside of the heat exchange spiral tube is fixedly connected with a water feeding pipe and a sewer pipe respectively, and the bottom of the heat exchange spiral tube is fixedly connected with an annular pipe. The utility model has the beneficial effects that: the utility model can fully recover the residual heat in the flue gas, so that the residual heat in the flue gas can be utilized, and the energy conservation and emission reduction in the electric energy production process can be realized.
Description
Technical Field
The utility model mainly relates to the field of flue gas recovery equipment, in particular to a flue gas waste heat recovery and utilization device for a thermal power plant.
Background
In recent years, the energy demand of China is increased rigidly, is limited by domestic resource guarantee capability and environmental capacity, is influenced by global energy safety and coping with climate change, the resource and environmental constraint is strengthened day by day, the situation of energy conservation and emission reduction is very severe, and in the production process of a thermal power plant, a coal-fired boiler generally has the problems of low heat utilization rate, overhigh temperature of waste heat of discharged flue gas, overhigh content of polluted gas in the flue gas and the like.
In the operation of the gas-fired boiler, the loss of the flue gas waste heat resource is the most important waste heat resource loss, and accounts for 60-70% of the loss of the boiler waste heat resource. The exhaust gas temperature is a main factor influencing the loss of the waste heat resources of the flue gas, the actual exhaust gas temperature of an enterprise using a boiler in China at present is generally higher than the design temperature, and under the general condition, the exhaust gas temperature is reduced by 0.6-1% every time the exhaust gas temperature is reduced by 10 ℃, the loss of the waste heat resources of the flue gas is correspondingly reduced by 1.2-2.4%, and the economic benefit is obvious. Therefore, under the big background of the current policy of energy conservation and emission reduction, a flue gas waste heat recovery device needs to be developed urgently, so that the heat in a boiler smoke exhaust system can be fully utilized, deep energy conservation and pollution reduction are realized, the environment and economy coordinated development is promoted, and the flue gas waste heat recovery has important practical significance for realizing the strategy of energy conservation and emission reduction in China.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a flue gas waste heat recycling device of a thermal power plant, which can fully recycle residual heat in flue gas, so that the residual heat in the flue gas can be utilized, and the energy conservation and emission reduction in the electric energy production process are realized.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a flue gas waste heat recycling device of a thermal power plant comprises a base, a waste heat recovery area, a flue gas discharge pipe and air exhaust equipment, wherein the base is provided with the waste heat recovery area, the top of the waste heat recovery area is provided with the flue gas discharge pipe, the waste heat recovery area comprises a heat conduction inner cylinder and a recovery area outer wall, the bottom of the heat conduction inner cylinder is fixedly connected in the base, the recovery area outer wall is fixedly arranged on the base, the heat conduction inner cylinder and the recovery area outer wall are heat recovery cavities, the heat exchange spiral pipe is arranged in the heat conduction inner cylinder, the outer part of the heat exchange spiral pipe is respectively and fixedly connected with a water supply pipe and a sewer pipe, the bottom of the heat exchange spiral pipe is fixedly connected with an annular pipe, the bottom of the annular pipe is provided with a plurality of spray heads, one side of the bottom of the recovery area outer wall is provided with a negative pressure discharge pipe, the negative pressure discharge pipe is fixedly connected with the air exhaust equipment, one side of the base is provided with a flue gas inlet pipe, the flue gas inlet pipe is communicated with the bottom of the heat conduction inner cylinder.
The heat exchange spiral pipe comprises a water inlet pipe, a spiral pipe and a water outlet pipe, the water inlet pipe penetrates through the heat conduction inner cylinder and is fixedly connected with an upper water pipe on the outer wall of the recovery area, the water outlet pipe penetrates through the heat conduction inner cylinder and is fixedly connected with a lower water pipe on the outer wall of the recovery area, and the annular pipe is fixedly connected to a part of the water outlet pipe in the waste heat recovery cavity.
The heat exchange spiral pipe is longitudinally provided with a plurality of groups at equal intervals in the heat conduction inner cylinder, and the annular pipe is longitudinally provided with a plurality of groups at equal intervals in the heat recovery cavity.
Compared with the prior art, the utility model has the beneficial effects that:
the heat-exchange spiral pipe type flue gas heat recovery device is simple in structure and low in production and manufacturing cost, more heat in flue gas can be absorbed through the heat-exchange spiral pipe, hot water after partial heat absorption is uniformly sprayed onto the outer wall of the heat-conducting inner cylinder in the heat recovery cavity through the spray head at the bottom of the annular pipe, a large amount of water absorbs the heat of the heat-conducting inner cylinder and is vaporized into water vapor, the heat in the flue gas is fully absorbed, and high-temperature water vapor is pumped out through the air pumping equipment and then is transmitted to the steam equipment to be utilized, so that energy conservation and emission reduction in the electric energy production process are realized.
Drawings
FIG. 1 is a schematic view of the present invention from a first external perspective;
FIG. 2 is a schematic view of a second external perspective of the present invention;
FIG. 3 is a schematic structural view of the outer wall of the recovery area of the present invention after being hidden;
FIG. 4 is a schematic view of the present invention in partial cross-section;
FIG. 5 is a schematic view of the connection structure of the heat exchange spiral pipe, the water supply pipe and the water drain pipe;
FIG. 6 is a schematic view of a heat exchange spiral tube structure according to the present invention.
Reference numerals shown in the drawings: 1. a base; 2. a waste heat recovery zone; 3. a flue gas discharge pipe; 4. air extraction equipment; 21. a heat-conducting inner cylinder; 22. the outer wall of the recovery area; 23. a heat recovery chamber; 24. a heat exchange spiral pipe; 25. a water feeding pipe; 26. a sewer pipe; 27. an annular tube; 28. a spray head; 29. a negative pressure discharge pipe; 31. a flue gas inlet pipe; 241. a water inlet pipe; 242. a spiral tube; 243. and (5) discharging a water pipe.
Detailed Description
The utility model is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
With reference to the attached drawings 1-6, a flue gas waste heat recycling device of a thermal power plant comprises a base 1, a waste heat recovery area 2, a flue gas discharge pipe 3 and an air extraction device 4, wherein the base 1 is provided with the waste heat recovery area 2, the top of the waste heat recovery area 2 is provided with the flue gas discharge pipe 3, the waste heat recovery area 2 comprises a heat conduction inner cylinder 21 and a recovery area outer wall 22, the bottom of the heat conduction inner cylinder 21 is fixedly connected in the base 1, the recovery area outer wall 22 is fixedly installed on the base 1, the heat conduction inner cylinder 21 and the recovery area outer wall 22 are heat recovery cavities 23, a heat exchange spiral pipe 24 is arranged in the heat conduction inner cylinder 21, the outer part of the heat exchange spiral pipe 24 is respectively and fixedly connected with a water supply pipe 25 and a water drain pipe 26, the bottom of the waste heat exchange spiral pipe 24 is fixedly connected with an annular pipe 27, the bottom of the annular pipe 27 is provided with a plurality of spray nozzles 28, one side of the bottom of the recovery area outer wall 22 is provided with a negative pressure discharge pipe 29, the negative pressure discharge pipe 29 is fixedly connected with an air extraction device 4, a smoke inlet pipe 31 is arranged on one side of the base 3, the smoke inlet pipe 31 is communicated with the bottom of the heat conduction inner cylinder 21, a heat recovery medium used in the device is water, cooling water enters the upper water pipe from the upper end of the upper water pipe and further enters each heat exchange spiral pipe, the water part after absorbing heat is sprayed out through a spray head at the bottom of the annular pipe, the water part after absorbing heat is discharged through the lower water pipe, hot water in the lower water pipe is discharged from the lower end of the lower water pipe, the hot water after being discharged can be directly used for heating, showering and the like, if the waste heat recovery amount is small, the hot water can be re-fed into the upper water pipe for secondary heat recovery, the heat exchange spiral pipe can absorb more heat in smoke, the heat conduction inner cylinder has better heat conduction performance, and the water part after absorbing heat is sprayed out of the heat conduction inner cylinder through the spray head below the annular pipe, water meets the vaporization of the heat conduction inner cylinder with high temperature and absorbs a large amount of heat, thereby fully collecting the heat of the flue gas into the water vapor, and then sending the heat into the steam equipment through the exhaust heat recovery area of the air extraction equipment to utilize the heat.
The heat exchange spiral pipe 24 comprises a water inlet pipe 241, a spiral pipe 242 and a water outlet pipe 243, the water inlet pipe 214 penetrates through the heat conduction inner cylinder 21 and the recovery area outer wall 22 to be fixedly connected with an upper water pipe 25, the water outlet pipe 243 penetrates through the heat conduction inner cylinder 21 and the recovery area outer wall 22 to be fixedly connected with a lower water pipe 26, a connecting ring pipe 27 is fixedly connected to a part of the water outlet pipe 243 in the waste heat recovery cavity 23, cooling water in the upper water pipe enters the spiral pipe through the water inlet pipe, smoke passes through the spiral pipe when rising in the heat conduction inner cylinder to heat water in the spiral pipe, waste heat in the smoke is absorbed, and water after heat absorption in the spiral pipe is discharged to the lower water pipe through the water outlet pipe to be discharged or enters the annular pipe to be sprayed into the heat recovery cavity through a spray head.
The heat exchange spiral pipes 24 are longitudinally arranged in the heat conduction inner cylinder 21 at equal intervals, the annular pipes 27 are longitudinally arranged in the heat recovery cavity 23 at equal intervals, the heat in more flue gas can be absorbed by the heat exchange spiral pipes and the annular pipes, cooling water enters the water feeding pipe from the upper end of the water feeding pipe, water in the sewer pipe is discharged from the bottom of the sewer pipe, and smooth water circulation in the heat exchange spiral pipes at all heights can be guaranteed.
When the device is used, when the smoke discharge amount is small and the heat recovery amount is small, hot water sprayed into the heat recovery cavity through the spray head at the bottom of the annular pipe can not be gasified in time due to too small heat absorption amount, at the moment, the water can fall into the base in a liquid state for temporary storage and continuously absorb the heat around the smoke inlet pipe and at the bottom of the heat exchange inner cylinder, at the moment, the water inlet speed in the water feeding pipe and the pressure difference in the sewer pipe of the water feeding pipe are properly adjusted, and the water outlet amount of the spray head at the bottom of the annular pipe is reduced.
Claims (3)
1. The utility model provides a flue gas waste heat recovery utilizes device of thermal power plant, includes base (1), waste heat recovery district (2), flue gas discharge pipe (3), air exhaust equipment (4), its characterized in that: the waste heat recovery device is characterized in that a waste heat recovery area (2) is arranged on the base (1), a flue gas discharge pipe (3) is arranged at the top of the waste heat recovery area (2), the waste heat recovery area (2) comprises a heat conduction inner tube (21) and a recovery area outer wall (22), the bottom of the heat conduction inner tube (21) is fixedly connected in the base (1), the recovery area outer wall (22) is fixedly installed on the base (1), the heat conduction inner tube (21) and the recovery area outer wall (22) are heat recovery cavities (23), a heat exchange spiral tube (24) is arranged in the heat conduction inner tube (21), a water feeding pipe (25) and a water discharging pipe (26) are respectively and fixedly connected to the outside of the heat exchange spiral tube (24), an annular pipe (27) is fixedly connected to the bottom of the waste heat exchange spiral tube (24), a plurality of spray nozzles (28) are arranged at the bottom of the annular pipe (27), and a negative pressure discharge pipe (29) is arranged on one side of the bottom of the recovery area outer wall (22), the negative pressure discharge pipe (29) is fixedly connected with an air extraction device (4), a flue gas inlet pipe (31) is arranged on one side of the base (3), and the flue gas inlet pipe (31) is communicated with the bottom of the heat conduction inner cylinder (21).
2. The flue gas waste heat recycling device of the thermal power plant as claimed in claim 1, characterized in that: the heat exchange spiral pipe (24) comprises a water inlet pipe (241), a spiral pipe (242) and a water outlet pipe (243), the water inlet pipe (214) penetrates through the heat conduction inner cylinder (21) and the recovery area outer wall (22) to be fixedly connected with the upper water pipe (25), the water outlet pipe (243) penetrates through the heat conduction inner cylinder (21) and the recovery area outer wall (22) to be fixedly connected with the lower water pipe (26), and the annular pipe (27) is fixedly connected onto the middle water outlet pipe (243) in the waste heat recovery cavity (23).
3. The flue gas waste heat recycling device of the thermal power plant as claimed in claim 1, characterized in that: the heat exchange spiral pipes (24) are longitudinally arranged in the heat conduction inner cylinder (21) at equal intervals, and the annular pipes (27) are longitudinally arranged in the heat recovery cavity (23) at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121562509.7U CN215637273U (en) | 2021-07-09 | 2021-07-09 | Flue gas waste heat recycling device of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121562509.7U CN215637273U (en) | 2021-07-09 | 2021-07-09 | Flue gas waste heat recycling device of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215637273U true CN215637273U (en) | 2022-01-25 |
Family
ID=79889316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121562509.7U Withdrawn - After Issue CN215637273U (en) | 2021-07-09 | 2021-07-09 | Flue gas waste heat recycling device of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215637273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089392A (en) * | 2024-04-19 | 2024-05-28 | 秦皇岛科泰工业有限公司 | Smelting furnace for recycling scrap steel |
-
2021
- 2021-07-09 CN CN202121562509.7U patent/CN215637273U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118089392A (en) * | 2024-04-19 | 2024-05-28 | 秦皇岛科泰工业有限公司 | Smelting furnace for recycling scrap steel |
| CN118089392B (en) * | 2024-04-19 | 2024-06-21 | 秦皇岛科泰工业有限公司 | Smelting furnace for recycling scrap steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20220125 Effective date of abandoning: 20231218 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20220125 Effective date of abandoning: 20231218 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |