CN210483828U - Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant - Google Patents
Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant Download PDFInfo
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- CN210483828U CN210483828U CN201921522185.7U CN201921522185U CN210483828U CN 210483828 U CN210483828 U CN 210483828U CN 201921522185 U CN201921522185 U CN 201921522185U CN 210483828 U CN210483828 U CN 210483828U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 61
- 238000010248 power generation Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000009833 condensation Methods 0.000 claims abstract description 25
- 230000005494 condensation Effects 0.000 claims abstract description 25
- 238000000605 extraction Methods 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004134 energy conservation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a steam turbine exhaust waste heat power generation energy-saving utilization system of a thermal power plant, which comprises a steam turbine, wherein an exhaust steam extraction outlet of the steam turbine is connected with an exhaust steam inlet of a steam turbine exhaust steam heater, an exhaust steam outlet of the steam turbine exhaust steam heater is connected with a waste heat utilization condensation water tank, an intermediate medium outlet of the steam turbine exhaust steam heater is connected with an intermediate medium inlet of a continuous exhaust waste heat heater, an intermediate medium outlet of the continuous exhaust waste heat heater is connected with an intermediate medium inlet of a hot secondary air heater, an intermediate medium outlet of the hot secondary air heater is connected with an inlet of a waste heat utilization steam turbine, an outlet of the waste heat utilization steam turbine is connected with an inlet of an intermediate medium exhaust steam exhaust box, an outlet of the intermediate medium exhaust steam exhaust box is respectively connected with an inlet of a No. 1 cooler and an inlet of a No. 2 cooler, the utility model discloses a steam, the cold source loss of the steam turbine is reduced, the power supply coal consumption of the unit is reduced, and the comprehensive utilization rate of the heat energy of the thermal power plant is improved.
Description
Technical Field
The utility model relates to an energy-conserving utilization field, concretely relates to electricity generation energy-conserving utilization system of steam turbine exhaust waste heat of thermal power plant.
Background
With the development of the power grid in China, the power generation forms are various, new energy power generation, water resource power generation and nuclear power generation greatly enter the power industry, the living development space of a thermal power plant is extremely compressed, the profit space of the thermal power plant is further reduced, the deep excavation and potential meaning of the energy-saving field of the thermal power plant is significant in the face of the existing living and operating current situation of the thermal power plant, and the energy-saving utilization of the thermal power plant at present has the following defects:
1. the waste heat of tail flue gas of a large thermal power plant is not fully utilized;
2. the loss of a steam turbine exhaust steam cold source is large, the loss of the steam turbine cold source is about 50% -60%, the loss of the cold source takes away a large amount of low-quality heat energy, and a large amount of energy is wasted because the heat energy is not fully utilized;
3. the evaporation consumption of the circulating cooling water of the power plant is serious, and certain economic operation pressure and water resource loss of the thermal power plant are caused.
Disclosure of Invention
To the above situation, the utility model aims at providing a steam turbine exhaust waste heat electricity generation energy-saving utilization system of thermal power plant has reduced the loss of steam turbine cold source, reduces unit power supply coal consumption, improves the comprehensive utilization ratio of thermal power plant heat energy, reduces thermal power unit to environmental heat pollution, plays energy saving and emission reduction's effect.
The technical scheme of the utility model as follows: a steam turbine exhaust waste heat power generation energy-saving utilization system of a thermal power plant comprises a steam turbine, wherein a steam exhaust extraction opening of the steam turbine is connected with a steam exhaust inlet of a steam turbine steam exhaust heater to enable partial steam exhaust to enter the steam turbine steam exhaust heater, a steam exhaust outlet of the steam turbine steam exhaust heater is connected with a waste heat utilization condensation water tank, a middle medium inlet of the steam turbine steam exhaust heater is connected with a middle medium low-boiling-point liquid conveying pipeline, a middle medium outlet is connected with a middle medium inlet of a continuous exhaust waste heat heater, a middle medium outlet of the continuous exhaust waste heat heater is connected with a middle medium inlet of a hot secondary air heater, a middle medium outlet of the hot secondary air heater is connected with an inlet of a waste heat utilization steam turbine, an outlet of the waste heat utilization steam turbine is connected with an inlet of the middle medium steam exhaust box, and an outlet of the middle medium steam exhaust box is respectively connected with an inlet, the outlet of the No. 1 cooler and the outlet of the No. 2 cooler are connected with a compression delivery pump through pipelines, the compression delivery pump is connected to an intermediate medium inlet of the steam turbine exhaust steam heater, a cooling water inlet of the No. 1 cooler is respectively connected with a circulating water pressure water inlet pipeline and a liquid ammonia evaporator outlet cooling water pipeline, the circulating water pressure water inlet pipeline and the liquid ammonia evaporator outlet cooling water pipeline are respectively provided with a control valve, the outlet of the No. 1 cooler is respectively connected with a cooling tower removing pipeline and a liquid ammonia evaporator removing pipeline, the cooling tower removing pipeline and the liquid ammonia evaporator removing pipeline are respectively provided with a control valve, and the inlet and the outlet of the No. 2 cooler are connected with a heat supply water return pipeline.
Preferably, the steam turbine exhaust steam heater is connected with a bypass in parallel, and the system operation is not influenced under the conditions of maintenance of the steam turbine exhaust steam heater and the like.
Preferably, a pipeline bypass is connected between the middle medium inlet and the middle medium outlet of the continuous waste heat heater in parallel, and a pipeline bypass is connected between the middle medium inlet and the middle medium outlet of the hot secondary air heater in parallel, so that uninterrupted operation of the system is ensured.
Preferably, the inlet of the dead steam heater is provided with a pipeline quick-closing valve for controlling the dead steam.
Preferably, the exhaust steam outlet of the waste heat utilization condensation water tank is connected with a vacuum pump through a vacuum pipe to pump out non-condensation gas.
Preferably, the exhaust steam outlet of the steam turbine is connected with a steam exhaust device, the lower part of the steam exhaust device is connected with a condensation water tank, the middle part of the side wall of the steam exhaust device is provided with an exhaust steam extraction outlet of the exhaust steam heater of the steam turbine, and the condensation water tank is connected with a condensation pump to discharge condensation water.
Preferably, the inlet of the hot secondary air heater is connected with hot secondary air, the outlet of the hot secondary air heater is connected with a user heating pipeline, the inlet of the continuous waste heat exhaust heater is connected with continuous waste steam, and the outlet of the continuous waste heat exhaust heater is connected with a fixed exhaust pipeline.
Preferably, the No. 1 cooler and the No. 2 cooler are connected with a pipeline bypass in parallel and used as a spare pipeline.
The technical proposal of the utility model utilizes the steam turbine exhaust to heat and generate power through the intermediate medium, utilizes the intermediate medium with low boiling point to be sent into the waste heat utilization steam turbine to do work after the intermediate medium is heated by the steam turbine exhaust steam heater, the continuous exhaust waste heat heater and the hot secondary air heater in sequence, the waste heat steam turbine drags the generator to convert the mechanical energy into the electric energy, the electric energy is output to the internet through the transformer, the low-boiling point intermediate medium exhaust steam after the waste heat utilization turbine does work flows to the No. 1 cooler and the No. 2 cooler through the intermediate medium exhaust steam exhaust box respectively, the cooling medium of the No. 1 cooler is circulating water or cooling water at the outlet of the liquid ammonia evaporator, the cooling medium of the No. 2 cooler is heat supply return water, and the low-boiling point intermediate medium cooled by the No. 1 cooler and the No. 2 cooler is conveyed to the low-boiling point turbine exhaust steam heater through a compression conveying pump to complete thermodynamic cycle.
The utility model discloses a steam turbine exhaust waste heat electricity generation energy-saving utilization system of thermal power plant has following beneficial effect:
1. the cold source loss of the steam turbine is reduced, the power supply coal consumption of the unit is reduced, the comprehensive utilization rate of the heat energy of the thermal power plant is improved, the thermal pollution of the thermal power unit to the environment is reduced, and the effects of energy conservation and emission reduction are achieved;
2. the circulating water loss is reduced, and water resources are saved;
3. the consumption of low-pressure steam in the liquid ammonia evaporator is reduced, the power supply coal consumption of the unit is reduced, and the effects of energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-a steam turbine; 2-a steam turbine exhaust steam heater; 3-pipeline quick closing valve; 4-a condensation water tank for waste heat utilization; 5-a vacuum pump; 6-continuous waste heat removal heater; 7-hot secondary air heater; 8, a waste heat utilization steam turbine; 9-intermediate medium exhaust steam exhaust box; cooler No. 10-1; cooler No. 11-2; 12-a compression delivery pump; 13-a condensation water tank; 14-a condensate pump; 15-steam exhaust device.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the accompanying drawings:
as shown in fig. 1, a steam turbine exhaust waste heat power generation energy-saving utilization system of a thermal power plant comprises a steam turbine 1, wherein a steam exhaust extraction outlet of the steam turbine 1 is connected with a steam exhaust inlet of a steam turbine exhaust heater 2, so that partial steam exhaust enters the steam turbine exhaust heater 2, a pipeline quick-closing valve 3 is arranged at the steam exhaust inlet of the steam turbine exhaust heater 2 and is used for controlling the steam exhaust, a steam exhaust outlet of the steam turbine exhaust heater 2 is connected with a waste heat utilization condensation water tank 4, the steam turbine exhaust heater 2 is connected with a bypass to guarantee normal operation of the system, a steam exhaust outlet of the waste heat utilization condensation water tank 4 is connected with a vacuum pump 5 through a vacuum pipe to extract non-condensation gas, a middle medium inlet of the steam turbine exhaust heater 2 is connected with a middle medium low-boiling-point liquid conveying pipeline, a middle medium outlet of the steam turbine exhaust heater 6 is connected with a middle medium inlet of a continuous exhaust waste heat heater 6, and a middle medium A pipeline bypass is connected between an intermediate medium inlet and an intermediate medium outlet of the continuous waste heat exhaust heater 6 in parallel, an intermediate medium outlet of the secondary air heater 7 is connected with an inlet of a waste heat utilization turbine 8, a pipeline bypass is connected between an intermediate medium inlet and an intermediate medium outlet of the hot secondary air heater 7 in parallel, the pipeline bypass is used as a standby pipeline, an outlet of the waste heat utilization turbine 8 is connected with an inlet of an intermediate medium exhaust steam exhaust box 9, an inlet of the hot secondary air heater 7 is connected with hot secondary air, an outlet of the hot secondary air heater 7 is connected with a user heating pipeline, an inlet of the continuous waste heat exhaust heater 6 is connected with continuous waste steam, an outlet of the continuous waste heat exhaust heater 6 is connected with a fixed exhaust pipeline, an outlet of the intermediate medium exhaust steam exhaust box 9 is respectively connected with an inlet of a No. 1 cooler 10 and an inlet of a No. 2 cooler 11, outlets of the No. 1 cooler 10 and the No. 2, the compression delivery pump 12 is connected to an intermediate medium inlet of the steam turbine exhaust steam heater 2, a cooling water inlet of the cooler 10 No. 1 is connected with a circulating water pressure water inlet pipeline and a liquid ammonia evaporator outlet cooling water pipeline respectively, control valves are arranged on the circulating water pressure water inlet pipeline and the liquid ammonia evaporator outlet cooling water pipeline respectively, an outlet of the cooler 10 No. 1 is connected with a cooling tower removing pipeline and a liquid ammonia evaporator removing pipeline respectively, the cooling tower removing pipeline and the liquid ammonia evaporator removing pipeline are provided with control valves respectively, an inlet and an outlet of the cooler 11 No. 2 are connected with a heat supply water return pipeline, and the cooler 10 No. 1 and the cooler 11 No. 2 are connected with a pipeline bypass in parallel and used as a standby pipeline.
Furthermore, a steam exhaust outlet of the steam turbine 1 is connected with a steam exhaust device 15, the lower part of the steam exhaust device 15 is connected with a condensation water tank 13, a steam exhaust extraction outlet of the steam turbine steam exhaust heater 2 is arranged in the middle of the side wall of the steam exhaust device 15, and the condensation water tank 13 is connected with a condensation pump 14 to discharge condensation water.
Further, the liquid inlet of the condensation water tank 13 is connected with the liquid outlet of the heat-distribution utilization condensation water tank 4 to uniformly treat the condensation water.
When the method is implemented specifically, exhaust steam in a steam turbine 1 is introduced into a steam turbine exhaust steam heater 2, the steam turbine exhaust steam is condensed into condensed water after being cooled and returns to a waste heat utilization condensed water tank 4, uncondensed gas is pumped to a vacuum pump 5 through a vacuum tube and is discharged, a low-boiling-point intermediate medium is heated by the steam turbine exhaust steam heater 2, a continuous exhaust waste heat heater 6 and a hot secondary air heater 7 in sequence and then is sent to a waste heat utilization steam turbine 8 for acting, the waste heat utilization steam turbine 8 drags a generator to convert mechanical energy into electric energy and is output to the network through a transformer, the low-boiling-point intermediate medium exhaust steam after the waste heat utilization steam turbine 8 does work flows to a No. 1 cooler 10 and a No. 2 cooler 11 through an intermediate medium exhaust steam tank 9 respectively, the cooling medium of the No. 1 cooler 10 is circulating water or low-temperature cooling water at the outlet, when a liquid ammonia system operates, the temperature of cooling water at the outlet of a liquid ammonia evaporator is only 8-10 ℃, the cooling effect is good, the other path of cooling medium circulating water is only used as a standby cooling medium water source, the scheme can reduce the consumption of circulating water in a whole plant, protect water resources and reduce the consumption of low-pressure steam by the liquid ammonia evaporator, and has the functions of saving energy, reducing emission and reducing energy consumption, the cooling medium of a No. 2 cooler 11 is heat supply return water, and the low-boiling-point intermediate medium cooled by the cooler is sent to a low-boiling-point steam turbine exhaust heater 2 through a compression delivery pump 12 to complete thermodynamic cycle.
The exhausted steam of the steam turbine 1 is condensed into condensed water after heat is released by convection of a low-boiling-point intermediate medium in the steam turbine exhaust steam heater 2, and the condensed water returns to the condensed water tank 13 through a pipeline.
Claims (8)
1. A power generation energy-saving utilization system utilizing waste heat of exhaust steam of a steam turbine of a thermal power plant comprises a steam turbine and is characterized in that a steam exhaust extraction opening of the steam turbine is connected with a steam exhaust inlet of a steam turbine steam exhaust heater to enable partial steam exhaust to enter the steam turbine steam exhaust heater, a steam exhaust outlet of the steam turbine steam exhaust heater is connected with a waste heat utilization condensation water tank, an intermediate medium inlet of the steam turbine steam exhaust heater is connected with an intermediate medium low-boiling-point liquid conveying pipeline, an intermediate medium outlet is connected with an intermediate medium inlet of a continuous exhaust waste heat heater, an intermediate medium outlet of the continuous exhaust waste heat heater is connected with an intermediate medium inlet of a hot secondary air heater, an intermediate medium outlet of the hot secondary air heater is connected with an inlet of a waste heat utilization steam turbine, an outlet of the waste heat utilization steam turbine is connected with an inlet of an intermediate medium steam exhaust steam tank, an outlet of the intermediate medium steam exhaust steam tank is respectively connected with, the outlet of the No. 1 cooler and the outlet of the No. 2 cooler are connected with a compression delivery pump through pipelines, the compression delivery pump is connected to an intermediate medium inlet of the steam turbine exhaust steam heater, a cooling water inlet of the No. 1 cooler is respectively connected with a circulating water pressure water inlet pipeline and a liquid ammonia evaporator outlet cooling water pipeline, the circulating water pressure water inlet pipeline and the liquid ammonia evaporator outlet cooling water pipeline are respectively provided with a control valve, the outlet of the No. 1 cooler is respectively connected with a cooling tower removing pipeline and a liquid ammonia evaporator removing pipeline, the cooling tower removing pipeline and the liquid ammonia evaporator removing pipeline are respectively provided with a control valve, and the inlet and the outlet of the No. 2 cooler are connected with a heat supply water return pipeline.
2. The power generation and energy conservation system utilizing waste heat of exhaust steam of a steam turbine of a thermal power plant as claimed in claim 1, wherein the exhaust steam heater of the steam turbine is connected in parallel with a bypass.
3. The thermal power plant steam turbine exhaust waste heat power generation energy-saving utilization system according to claim 1, characterized in that a pipeline bypass is connected in parallel between the intermediate medium inlet and the intermediate medium outlet of the continuous exhaust waste heat heater, and a pipeline bypass is connected in parallel between the intermediate medium inlet and the intermediate medium outlet of the hot secondary air heater.
4. The power generation and energy conservation system utilizing waste heat of steam exhaust of a steam turbine of a thermal power plant as claimed in claim 1, wherein an inlet of the exhaust steam heater is provided with a pipeline quick-closing valve.
5. The power generation and energy conservation system utilizing the exhaust steam, the waste heat and the waste heat of the steam turbine of the thermal power plant as claimed in claim 1, wherein the exhaust steam outlet of the waste heat utilization condensation water tank is connected with a vacuum pump through a vacuum pipe.
6. The power generation energy-saving utilization system utilizing the waste heat of the exhaust steam of the steam turbine of the thermal power plant as claimed in claim 1, wherein the exhaust steam outlet of the steam turbine is connected with the exhaust steam device, the lower part of the exhaust steam device is connected with the condensation water tank, the exhaust steam extraction outlet of the exhaust steam heater of the steam turbine is arranged in the middle of the side wall of the exhaust steam device, and the condensation water tank is connected with the condensation pump.
7. The thermal power plant steam turbine exhaust waste heat power generation energy-saving utilization system according to claim 1, wherein an inlet of the hot overgrate air heater is connected with hot overgrate air, an outlet of the hot overgrate air heater is connected with a user heating pipeline, an inlet of the continuous exhaust waste heat heater is connected with continuous exhaust waste steam, and an outlet of the continuous exhaust waste heat heater is connected with a fixed exhaust pipeline.
8. The thermal power plant steam turbine exhaust waste heat power generation energy-saving utilization system according to claim 1, wherein the cooler No. 1 and the cooler No. 2 are connected with a pipeline bypass in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921522185.7U CN210483828U (en) | 2019-09-09 | 2019-09-09 | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921522185.7U CN210483828U (en) | 2019-09-09 | 2019-09-09 | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant |
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| CN210483828U true CN210483828U (en) | 2020-05-08 |
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| CN201921522185.7U Expired - Fee Related CN210483828U (en) | 2019-09-09 | 2019-09-09 | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464216A (en) * | 2021-07-28 | 2021-10-01 | 吴正锋 | Steam turbine for recovering waste heat of steam boiler |
| CN114427484A (en) * | 2021-12-31 | 2022-05-03 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
-
2019
- 2019-09-09 CN CN201921522185.7U patent/CN210483828U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464216A (en) * | 2021-07-28 | 2021-10-01 | 吴正锋 | Steam turbine for recovering waste heat of steam boiler |
| CN114427484A (en) * | 2021-12-31 | 2022-05-03 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
| CN114427484B (en) * | 2021-12-31 | 2022-12-02 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220706 Address after: 316000 No. 1, middle section of chahuli village, Donggang street, Putuo District, Zhoushan City, Zhejiang Province Patentee after: Xu Ke Address before: 030600 1-4-4-xihu, No.68 Zhengtai street, Yuci District, Jinzhong City, Shanxi Province Patentee before: Wang Jinlong |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200508 |