CN211290235U - Circulating water waste heat recovery device of thermal power plant - Google Patents
Circulating water waste heat recovery device of thermal power plant Download PDFInfo
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- CN211290235U CN211290235U CN201920850368.5U CN201920850368U CN211290235U CN 211290235 U CN211290235 U CN 211290235U CN 201920850368 U CN201920850368 U CN 201920850368U CN 211290235 U CN211290235 U CN 211290235U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
The utility model discloses a circulating water waste heat recovery device of a thermal power plant, which comprises a heat source generating system and a heating system, the heat source generating system comprises a power station boiler and a steam turbine connected with the power station boiler, the steam turbine is provided with a steam extraction end and a steam exhaust end, the steam extraction end is divided into two paths, one path is connected with a steam-water heat exchanger in a heating system, the other path is connected with an absorption heat pump as a driving heat source, the exhaust end is connected with a condenser, the condenser is divided into two paths, one path is connected with a cooling tower, the top of the cooling tower is provided with a sealing cover for keeping negative pressure, a chemical treatment box with the function of heating steam is arranged in the sealing cover, the water obtained by the chemical treatment box enters a cooling water pool in the cooling tower and then returns to the condenser, the other path of the condenser is connected with the absorption heat pump, and the absorption heat pump pumps heat and then returns to the condenser. Compared with the prior art, the utility model discloses can effectively utilize the circulating water waste heat, energy saving and emission reduction does benefit to the comprehensive utilization of resources.
Description
Technical Field
The utility model relates to a thermal power plant circulating water utilizes technical field, concretely relates to thermal power plant circulating water waste heat recovery device.
Background
In most heat supply power plants in northern China, waste heat of a condenser is discharged into the atmosphere through a cooling tower, the city is rapidly developed correspondingly, concentrated heat supply conforms to continuous growth, the power supply capacity of the power plant is not matched with the growth demand of heat supply load, the letter heat supply power plant solves the problem of short-term heat supply, and the heat load hardly reaches the output capacity of the power plant in a short time. Therefore, the internal excavation of the power plant becomes an effective way for solving the problem of short-term heat load increase. For a thermal power plant serving as a main heat source of centralized heat supply, a large amount of residual pressure, residual heat, circulating water, water vapor and the like are discharged into the atmosphere in the production process, and are not effectively utilized, so that the resource waste is caused, and the energy utilization rate is far lower than that of some developed countries, so that the energy conservation strength is increased in China, and if the residual heat is effectively utilized, the energy conservation becomes the most important factor. In order to apply the increasingly large energy-saving pressure, various circulating water waste heat recycling technologies are produced, but the energy waste is large in the cooling tower condensation emptying mode, and the comprehensive utilization of the energy is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects, the utility model aims at providing a thermal power plant circulating water waste heat recovery device can effectively utilize the circulating water waste heat, and energy saving and emission reduction do benefit to the comprehensive utilization of resource.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a thermal power plant circulating water waste heat recovery device comprises a heat source generating system and a heating and heat supplying system, wherein the heat source generating system comprises a power station boiler and a steam turbine connected with the power station boiler, the steam turbine is provided with a steam extraction end and a steam exhaust end, the steam extraction end is divided into two paths, one path is connected with a steam-water heat exchanger in the heating and heat supplying system, the other path is connected with an absorption heat pump to serve as a driving heat source, the steam exhaust end is connected with a condenser, the condenser is divided into two paths, the other path is connected with a cooling tower, a sealing cover for keeping negative pressure is arranged at the top of the cooling tower, a chemical treatment box with a steam heating function is arranged in the sealing cover, moisture obtained through the chemical treatment box enters a cooling water pool in the cooling tower and then returns to the condenser, and the other path of the condenser is connected with the absorption heat pump; the heating system also comprises a heating user connected with the steam-water heat exchanger through a heating water supply pipeline, a heating water return pipeline of the heating user is connected with the absorption heat pump, and the absorption heat pump is connected with the steam-water heat exchanger to re-send the heating return water with the increased temperature to the heating user.
Furthermore, a pressure gauge is arranged on one side of the steam turbine.
And the condenser, the steam-water heat exchanger and the absorption heat pump are all provided with a condensate recoverer.
And a solar panel is arranged on the surface of the sealing cover.
The sealing cover is square or conical.
When the utility model is used, under the action of a power station boiler and a steam turbine, steam turbine heating extraction steam is used as a primary heat source, one part of heating extraction steam is transmitted to a steam-water heat exchanger of a heating station through a steam pipeline to be used as a secondary heat source, the heating extraction steam is converted into hot water and then supplied to a heating user, the other part of heating extraction steam is sent to an absorption heat pump to be used as a driving heat source, and condensed water which is changed into steam is sent to a condensed water recoverer through a condensed water pipeline under the action of the absorption heat pump; heating return water after passing through a heating house is transmitted to the absorption heat pump through a pipeline, the temperature of the return water is increased under the action of the absorption heat pump, the return water returns to the steam-water heat exchanger again, hot water is directly sent to a heating user through the steam-water heat exchanger for use, and the waste heat of the return water is effectively utilized; the circulating water has a certain temperature, a part of the circulating water is sent into an absorption heat pump, the absorption heat pump absorbs heat to obtain a part of heat source, waste heat is utilized, then the part of the circulating water is sent into the condenser again and is recovered through a condensate recoverer, the other part of the circulating water enters a cooling tower and returns to the condenser after the action of a cooling water pool, one part of the circulating water is recovered through the condensate recoverer, and the other part of the circulating water continues to circulate into the absorption heat pump and the cooling tower, and the actions are repeated;
the top of the cooling tower is additionally provided with a sealing cover, proper negative pressure is kept in the cover, water vapor at the top of the tower is guided into a chemical treatment box by adopting a pipeline for treatment, and treated water enters a cooling water pool, so that the water supplement amount of the cooling water pool can be reduced; the solar panel is arranged on the sealing cover, so that the circulating water return temperature at the top of the cooling tower can be increased, the energy consumed by heating steam of the chemical treatment box is reduced, and the anti-freezing cost of the cooling water pool in winter can be reduced.
Compared with the prior art, the utility model can solve the problem of large water supplement amount of the cooling tower caused by the vaporization of the water vapor on the top of the tower, can well solve the problem of large water supplement amount by using the technical scheme, can reduce the consumption of water heating steam of the chemical treatment box, and achieves the purposes of saving water and heat; adopt the cooling tower top to install the sealed cowling additional, system design is simple, and the installation degree of difficulty is little, and investment cost is little, and operation and maintenance cost still less can solve the problem that the too big thermal power plant water consumption that leads to of cooling tower moisturizing well is big, and winter, summer homoenergetic normal operating, can retrieve a large amount of water yield and heat, gain fine energy-conserving effect and economic benefits.
Drawings
The structure and features of the present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a block schematic diagram of the present invention.
Detailed Description
FIG. 1 is an embodiment of the present invention, which discloses a device for recovering the waste heat of circulating water in a thermal power plant, comprising a heat source generating system located in a plant area and a heating and heating system located outside the plant area, wherein the heat source generating system comprises a power station boiler and a steam turbine connected with the power station boiler, the steam turbine has a steam extraction end and a steam exhaust end, the steam extraction end is divided into two paths, one path is connected with a steam-water heat exchanger in the heating and heating system through a steam pipeline, the other path is connected with an absorption heat pump as a driving heat source of the absorption heat pump, the steam exhaust end is connected with a steam condenser, the steam condenser is divided into two paths, the other path is connected with a cooling tower, the top of the cooling tower is provided with a sealing cover for maintaining negative pressure, a chemical treatment box with a function of heating steam is arranged inside the sealing cover, moisture obtained through the chemical treatment box enters a cooling water pool in the, the other path of the condenser is connected with an absorption heat pump, and after heat is pumped by the absorption heat pump, the circulating water with the temperature of 32 ℃ is changed into the circulating water with the temperature of 27 ℃ and returns to the condenser again; the heating system also comprises a heating user connected with the steam-water heat exchanger through a heating water supply pipeline, a heating water return pipeline of the heating user is connected with the absorption heat pump, 55-degree return water in the heating water return pipeline is changed into 85-degree return water through heating of the absorption heat pump, and then the heating water return pipeline is connected with the steam-water heat exchanger to re-send the heating return water with the increased temperature to the heating user.
Furthermore, a pressure gauge is arranged on one side of the steam turbine.
And the condenser, the steam-water heat exchanger and the absorption heat pump are all provided with a condensate recoverer.
The surface of the sealing cover is provided with the solar panel, so that the circulating water return temperature at the top of the cooling tower can be increased to a certain extent, the energy consumed by heating steam of the chemical treatment box is reduced, and the anti-freezing cost of the cooling water pool in winter can be reduced.
The sealing cover is square or conical.
When the utility model is used, under the action of a power station boiler and a steam turbine, steam turbine heating extraction steam is used as a primary heat source, one part of heating extraction steam is transmitted to a steam-water heat exchanger of a heating station through a steam pipeline to be used as a secondary heat source, the heating extraction steam is converted into hot water and then supplied to a heating user, the other part of heating extraction steam is sent to an absorption heat pump to be used as a driving heat source, and condensed water which is changed into steam is sent to a condensed water recoverer through a condensed water pipeline under the action of the absorption heat pump; heating return water after passing through a heating house is transmitted to the absorption heat pump through a pipeline, the temperature of the return water is increased under the action of the absorption heat pump, the return water returns to the steam-water heat exchanger again, hot water is directly sent to a heating user through the steam-water heat exchanger for use, and the waste heat of the return water is effectively utilized; the circulating water has a certain temperature, a part of the circulating water is sent into an absorption heat pump, the absorption heat pump absorbs heat to obtain a part of heat source, waste heat is utilized, then the part of the circulating water is sent into the condenser again and is recovered through a condensate recoverer, the other part of the circulating water enters a cooling tower and returns to the condenser after the action of a cooling water pool, one part of the circulating water is recovered through the condensate recoverer, and the other part of the circulating water continues to circulate into the absorption heat pump and the cooling tower, and the actions are repeated;
the top of the cooling tower is additionally provided with a sealing cover, proper negative pressure is kept in the cover, water vapor at the top of the tower is guided into a chemical treatment box by adopting a pipeline for treatment, and treated water enters a cooling water pool, so that the water supplement amount of the cooling water pool can be reduced; the solar panel is arranged on the sealing cover, so that the circulating water return temperature at the top of the cooling tower can be increased, the energy consumed by heating steam of the chemical treatment box is reduced, and the anti-freezing cost of the cooling water pool in winter can be reduced.
The aforesaid is only a plurality of concrete implementation manners of the utility model, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (4)
1. The utility model provides a thermal power plant circulating water waste heat recovery device, includes that the heat source takes place system and heating system, its characterized in that: the heat source generating system comprises a power station boiler and a steam turbine connected with the power station boiler, the steam turbine is provided with a steam extraction end and a steam exhaust end, the steam extraction end is divided into two paths, one path is connected with a steam-water heat exchanger in a heating system, the other path is connected with an absorption heat pump as a driving heat source, the steam exhaust end is connected with a condenser, the condenser is divided into two paths, the other path is connected with a cooling tower, the top of the cooling tower is provided with a sealing cover for maintaining negative pressure, a chemical treatment box with a steam heating function is arranged in the sealing cover, moisture obtained through the chemical treatment box enters a cooling water pool in the cooling tower and then returns to the condenser, the other path of the condenser is connected with the absorption heat pump, and the moisture returns to the condenser after heat is absorbed through; the heating system also comprises a heating user connected with the steam-water heat exchanger through a heating water supply pipeline, a heating water return pipeline of the heating user is connected with an absorption heat pump, and the absorption heat pump is connected with the steam-water heat exchanger to re-send the heating return water with the increased temperature to the heating user; and the condenser, the steam-water heat exchanger and the absorption heat pump are all provided with a condensate recoverer.
2. The circulating water waste heat recovery device of the thermal power plant according to claim 1, characterized in that: furthermore, a pressure gauge is arranged on one side of the steam turbine.
3. The circulating water waste heat recovery device of the thermal power plant according to claim 1, characterized in that: and a solar panel is arranged on the surface of the sealing cover.
4. The circulating water waste heat recovery device of the thermal power plant according to claim 1, characterized in that: the sealing cover is square or conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920850368.5U CN211290235U (en) | 2019-06-06 | 2019-06-06 | Circulating water waste heat recovery device of thermal power plant |
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| CN201920850368.5U CN211290235U (en) | 2019-06-06 | 2019-06-06 | Circulating water waste heat recovery device of thermal power plant |
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| CN211290235U true CN211290235U (en) | 2020-08-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236380A (en) * | 2021-06-21 | 2021-08-10 | 西安西热节能技术有限公司 | Low-pressure cylinder zero-output coupling heat storage tank's cold unit heat supply system that prevents frostbite |
| CN116221804A (en) * | 2022-12-30 | 2023-06-06 | 江苏港嘉节能科技有限公司 | Method and system for recycling waste heat of circulating water of thermal power plant |
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2019
- 2019-06-06 CN CN201920850368.5U patent/CN211290235U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236380A (en) * | 2021-06-21 | 2021-08-10 | 西安西热节能技术有限公司 | Low-pressure cylinder zero-output coupling heat storage tank's cold unit heat supply system that prevents frostbite |
| CN113236380B (en) * | 2021-06-21 | 2022-09-06 | 西安西热节能技术有限公司 | Low-pressure cylinder zero-output coupling heat storage tank's cold unit heating system that prevents frostbite |
| CN116221804A (en) * | 2022-12-30 | 2023-06-06 | 江苏港嘉节能科技有限公司 | Method and system for recycling waste heat of circulating water of thermal power plant |
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