CN112879996A - Waste heat comprehensive utilization system for circulating cooling water of thermal power plant - Google Patents
Waste heat comprehensive utilization system for circulating cooling water of thermal power plant Download PDFInfo
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- CN112879996A CN112879996A CN202110148145.6A CN202110148145A CN112879996A CN 112879996 A CN112879996 A CN 112879996A CN 202110148145 A CN202110148145 A CN 202110148145A CN 112879996 A CN112879996 A CN 112879996A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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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]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
Abstract
The invention discloses a waste heat comprehensive utilization system for circulating cooling water of a thermal power plant, which comprises a condensation component and a water return component, wherein the condensation component comprises a steam turbine, a condenser connected with the steam turbine, a cooling tower connected with the condenser, a front compression heat pump and an absorption heat pump which are connected with the condenser in parallel; the water return component comprises a rear compression heat pump and an adjusting water pump connected with the rear compression heat pump; the method of the invention utilizes the front compression heat pump and the absorption heat pump to replace the primary low-pressure heater, recovers the low-grade heat source of the circulating water of the power plant, reduces the air extraction amount of the steam turbine, improves the heat efficiency of the heat recovery system, saves the cost, further utilizes the waste heat, heats the returned water of the power plant, improves the heat efficiency of the power plant, realizes the hot water supply for users, improves the utilization of the circulating water, improves the utilization rate of the waste heat of the circulating water, and achieves the effects of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of energy utilization, in particular to a waste heat comprehensive utilization system for circulating cooling water of a thermal power plant.
Background
Since the 20 th century, the human society has faced a serious challenge in various aspects, wherein the energy and environmental problems are particularly prominent, and with the increasing consumption of non-renewable energy sources such as fossil fuel, the global energy situation is more and more severe, and energy conservation becomes a hot spot of people. In China, thermal power generation is the main country, and in a conventional coal-fired thermal power system, energy conservation and consumption reduction of a thermal power plant are mainly concentrated on three main machines of a boiler, a steam turbine and a generator and additional systems thereof. Through theoretical research and practical application, great economic benefits are obtained, the space for energy conservation and optimization is continuously reduced, and the bottleneck point of development is met. At present, the boiler efficiency and the steam turbine efficiency of large-scale thermal power generating units in China reach more than 90%, the space for exploiting the energy-saving potential is smaller and smaller, but the thermal power plants have certain problems in the aspect of energy utilization. Only about 35% of heat energy in the power plant is converted into electric energy, and more than 60% of energy is mainly dissipated to the environment through flue gas and circulating cooling water, so that the rest heat resources are abundant, and most of the energy is the residual heat dissipated by the circulating cooling water. For the waste heat utilization of a power plant, the temperature of the circulating cooling water is about 20-35 ℃, and the circulating cooling water is only a few degrees higher than the ambient temperature, and belongs to a low-grade heat source. Most of heat is directly discharged to the environment, so that energy waste is caused, and the ecological environment nearby a power plant is polluted.
At present, the main utilization mode is that during the heating period in winter, circulating water is directly supplied to heating equipment of residents, and waste heat is utilized to meet the heating requirement. However, during non-heating period, the circulating water is still sent to the cooling tower, and the heat is released to the air, which causes a great loss of energy.
The water source heat pump technology is a device for recycling a low-grade heat source, conveying energy from low temperature to high temperature and improving the heat energy utilization rate, is mature gradually at present and is widely applied to various fields such as petroleum, chemical industry, metallurgy, power plants and the like. The water source heat pump can be divided into an absorption type heat pump and a compression type heat pump, wherein the absorption type heat pump takes low-temperature water as a low-grade heat source and high-temperature water as a driving heat source, and water is heated and supplied by absorbing heat energy of the low-grade heat source and heat energy of the driving heat source. The low-grade heat source of the compression heat pump is the same as that of the absorption heat pump, and low-temperature water is used as the low-grade heat source, except that the compression heat pump is driven by a compressor, and the water supply is heated by extracting heat energy of the low-grade heat source.
At present, some circulating cooling water waste heat of a power plant is utilized through a water source heat pump device, and some problems which cannot be ignored still exist, for example, in a heating season, a low-grade heat source of circulating water is improved through the water source heat pump, heat is supplied to a user through heat exchange with a user side, but after the heating season is finished, a system stops running, the waste heat of the circulating water cannot be fully utilized, in addition, in the heating season, only part of the circulating water which can be utilized by the heat pump is used, a large part of the waste heat is discharged into the air, and energy is wasted. For example, patent publication No. CN103726892B discloses a turbine circulating water waste heat utilization device, which directly performs heating by using circulating water from a condenser, and the heating stability is very poor because the temperature of the circulating water is not constant. For example, patent publication No. CN209840253U discloses a heat pump system for cold and heat coupling utilization of waste heat of a power plant, which utilizes circulating cooling water as a heat source of the heat pump to supply cold for users during the summer cold supply period, and this way greatly reduces the refrigeration efficiency of the heat pump. For example, patent publication No. CN108981222A discloses an indirect cooling tower circulating water waste heat integrated with an absorption heat pump, and condensed water enters an absorber and a condenser of the absorption heat pump to absorb heat, so as to realize heat recovery, but only a small part of the circulating water waste heat can be utilized by heating the condensed water, and most of the circulating water waste heat still runs off, and thus, an efficient effect cannot be achieved. The invention provides a comprehensive utilization system for circulating water waste heat of a thermal power plant, which utilizes the circulating water waste heat to combine an absorption heat pump and a compression heat pump to supply hot water for users and heat boiler return water according to the principle of a thermal power plant and the principle of a heat pump, and aims to improve the heat efficiency of the boiler return water and improve the utilization efficiency of the circulating water waste heat.
At present, most heat pump systems supply the residual heat of circulating cooling water to cold/hot users, and the utilization rate of the residual heat is not greatly improved. The heat pump system for utilizing the waste heat of the circulating cooling water is improved on the basis of the existing heat pump system, an absorption heat pump and a compression heat pump are used in a heat regenerative system of a power plant to replace a primary low-pressure heater, and the low-temperature waste heat of the circulating cooling water of the power plant and steam extraction of a steam turbine are recovered to heat condensed water. In the aspect of supplying heat to users, a compression heat pump is used for supplying hot water to the users. The waste heat of the circulating cooling water of the power plant is comprehensively utilized, the cost is saved, and the utilization rate of the circulating water of the power plant is greatly improved.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the prior circulating cooling water waste heat comprehensive utilization system of the thermal power plant.
Therefore, the invention aims to provide a system for comprehensively utilizing the waste heat of the circulating cooling water of the thermal power plant, which realizes comprehensive utilization of the waste heat of the circulating cooling water of the power plant, saves the cost and greatly improves the utilization rate of the circulating water of the power plant.
In order to solve the technical problems, the invention provides the following technical scheme: a heat-engine plant circulating cooling water waste heat comprehensive utilization system comprises a condensation component and a water return component, wherein the condensation component comprises a steam turbine, a condenser connected with the steam turbine, a cooling tower connected with the condenser, a front compression heat pump and an absorption heat pump which are connected with the condenser in parallel; the water return assembly comprises a rear compression heat pump and a regulating water pump connected with the rear compression heat pump.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: the steam turbine and the condenser form a loop, and the loop part passes through the absorption heat pump.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: and part of the cooling water in the condenser is also connected with a condensate pump, the channel passes through the preposed compression heat pump and the absorption heat pump and is finally connected to a lower-level low-pressure heater, and the preposed compression heat pump heats the condensate to 60 ℃.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: the condenser also forms a loop with the cooling tower, and a cooling water pump is also arranged in the loop.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: and a loop is connected in parallel in the loop of the condenser connected with the cooling tower, passes through the absorption heat pump, and can heat the condensed water to 90 ℃.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: and a loop is also connected in parallel in a parallel branch of the condenser and cooling tower connecting loop, and passes through the preposed compression heat pump.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: in the loop of the condenser connected with the cooling tower, a loop is also connected in parallel on the cooling tower and the cooling water pump branch, and the loop passes through the rear compression heat pump.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: the adjusting water pump provides a water source through user return water.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: and the output water source of the regulating water pump passes through the rear compression type heat pump.
As a preferred scheme of the heat-engine plant circulating cooling water waste heat comprehensive utilization system, the system comprises the following steps: the rear compression heat pump can supply hot water to users.
The invention has the beneficial effects that:
the method of the invention utilizes the front compression heat pump and the absorption heat pump to replace the primary low-pressure heater, recovers the low-grade heat source of the circulating water of the power plant, reduces the air extraction quantity of the steam turbine, improves the heat efficiency of the regenerative system and saves the cost. And the waste heat of the circulating water of the power plant can be fully utilized in the non-cooling and heating season. The invention utilizes the rear compression heat pump to recover the circulating water waste heat of the power plant to provide hot water for users, and makes up the vacancy of non-cooling and heating seasons compared with a cooling and heating system for the users, so that the waste heat is further utilized, the power plant return water is heated, the thermal efficiency of the power plant is improved, the hot water is provided for the users, the utilization of the circulating water is improved, the utilization rate of the circulating water waste heat is improved, and the effects of energy conservation and emission reduction are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic diagram of the overall structure of the waste heat comprehensive utilization system of the circulating cooling water of the thermal power plant.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1, for the first embodiment of the present invention, a system for comprehensively utilizing the waste heat of the circulating cooling water of the thermal power plant is provided, the system includes a condensation component 100 and a water return component 200, wherein the condensation component 100 includes a steam turbine 101, a condenser 102 connected to the steam turbine 101, a cooling tower 103 connected to the condenser 102, a pre-compression heat pump 104 and an absorption heat pump 105 connected to the condenser 102 in parallel; the water return assembly 200 comprises a rear compression heat pump 201 and a regulating water pump 202 connected with the rear compression heat pump 201.
The turbine 101 and the condenser 102 form a loop, and the loop is partially passed through an absorption heat pump 105. The condenser 102 is also connected with a condensate pump 102a, the channel passes through a pre-compression heat pump 104 and an absorption heat pump 105, and is finally connected to a lower-level low-pressure heater, and the pre-compression heat pump 104 heats the condensate to 60 ℃. The condenser 102 also forms a circuit with the cooling tower 103, and a cooling water pump 103a is also provided in the circuit.
The steam turbine 101 is connected with the generator, an exhaust port of the steam turbine 101 is connected with an air inlet of the condenser 102, a cooling water outlet of the condenser 102 is connected with the cooling tower 103 through a pipeline, and a cooling water inlet of the condenser 102 is connected with the cooling tower 103 through a pipeline. A condensed water outlet of the condenser 102 is connected with a condensed water pump 102a, the condensed water pump 102a is connected with a water inlet of the front compression heat pump 104, a circulating cooling water outlet of the condenser 102 is connected with a low-temperature heat source side inlet of the front compression heat pump 104 through a pipeline, and a circulating cooling water inlet of the condenser 102 is connected with a low-temperature heat source side outlet of the front compression heat pump 104 through a pipeline. A condensed water outlet of the front compression heat pump 104 is connected with a water inlet of the absorption heat pump 105, a cooling water outlet of the condenser 102 is connected with a low-temperature heat source side inlet of the absorption heat pump 105 through a pipeline, and a cooling water inlet of the condenser 102 is connected with a low-temperature heat source side outlet of the absorption heat pump 105 through a pipeline 15. The extraction of the steam turbine 101 is connected with the inlet of the driving heat source side of the absorption heat pump 105 through a pipeline, and the condensed water outlet of the condenser 102 is connected with the outlet of the driving heat source side of the absorption heat pump 105 through a pipeline. A cooling water outlet of the condenser 102 is connected with a low-temperature heat source side inlet of the rear compression heat pump 201 through a pipeline, and a cooling water inlet of the condenser 102 is connected with a low-temperature heat source side outlet of the rear compression heat pump 201 through a pipeline. The hot water outlet of the rear compression heat pump 201 is connected with the water supply port of the hot water user through a pipeline 21, and the cold water inlet of the rear compression heat pump 201 is connected with the water return port of the hot water user through a pipeline.
Example 2
Referring to fig. 1, a second embodiment of the present invention, which is different from the first embodiment, is: the loop connecting the condenser 102 and the cooling tower 103 is also connected in parallel with a loop, the loop passes through an absorption heat pump 105, and the absorption heat pump 105 can heat the condensed water to 90 ℃.
A parallel branch of the circuit connecting the condenser 102 and the cooling tower 103 is also connected in parallel with a circuit which passes through a pre-compression heat pump 104. In the circuit connecting the condenser 102 and the cooling tower 103, a circuit is connected in parallel to a branch between the cooling tower 103 and the cooling water pump 103a, and the circuit passes through a post-compression heat pump 201.
The regulated water pump 202 provides a source of water by the return water of the user. The output water source of the regulating water pump 202 passes through the rear compression heat pump 201. The rear compression heat pump 201 is capable of supplying hot water to the user.
Compared with the embodiment 1, further, the exhaust gas of the steam turbine 101 is cooled by the condenser 102, and a part of the cooling water from the condenser 102 enters the cooling tower 103 for cooling through the pipeline 10, and then enters the condenser 102 for continuous heat exchange through the pipeline 11 by using the circulating water pump. In the method, a water source heat pump is used for replacing a low-pressure heater to heat a condensed water system. Condensed water from the condenser 102 enters the pre-compression heat pump 104 through the condensed water pump 102a, a part of cooling water from the condenser 102 enters the low-temperature heat source side of the pre-compression heat pump 104 through the pipeline 12, and the cooling water after the low-grade heat source is extracted by the pre-compression heat pump 104 enters the condenser 102. The pre-compression heat pump 104 heats the condensed water to 60 ℃, then the condensed water enters the absorption heat pump 105 to be continuously heated, and a part of cooling water from the condenser 102 enters the low-temperature heat source side of the absorption heat pump 105 to provide a low-grade heat source, and then the cooling water enters the condenser 102 through a pipeline. The air extracted by the steam turbine 101 enters the heat source side driven by the absorption heat pump 105 through a pipeline to provide a high-grade heat source, and then steam condensate flows into a gas condensing device of the steam turbine 101. The absorption heat pump 105 heats the condensed water with the temperature of 60 ℃ to 90 ℃ and then sends the heated condensed water to the next stage of low-pressure heater for continuous heating. In a hot water supply system for users by using a water source heat pump, a part of cooling water from the condenser 102 enters the low-temperature heat source side of the post-compression heat pump 201, and the cooling water extracted from the low-grade heat source by the post-compression heat pump 201 enters the condenser 102 through a pipeline. The return water of the hot water user enters the rear compression heat pump 201 through a pipeline by using the hot water load adjusting water pump 202 to absorb heat and then is supplied to the hot water user through the pipeline.
The rest of the structure is the same as that of embodiment 1.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a thermal power plant recirculated cooling water waste heat comprehensive utilization system which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a condensing module (100) comprising a steam turbine (101), a condenser (102) connected to the steam turbine (101), a cooling tower (103) connected to the condenser (102), a pre-compression heat pump (104) and an absorption heat pump (105) connected in parallel to the condenser (102);
the water return assembly (200) comprises a rear compression heat pump (201) and a regulating water pump (202) connected with the rear compression heat pump (201).
2. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 1, characterized in that: the steam turbine (101) and the condenser (102) form a loop, and the loop part passes through the absorption heat pump (105).
3. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 1 or 2, characterized in that: and a condensate pump (102a) is also connected to part of the cooling water in the condenser (102), the channel passes through the preposed compression heat pump (104) and the absorption heat pump (105) and is finally connected to a lower-level low-pressure heater, and the preposed compression heat pump (104) heats the condensate to 60 ℃.
4. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 3, characterized in that: the condenser (102) and the cooling tower (103) form a loop, and a cooling water pump (103a) is arranged in the loop.
5. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 4, characterized in that: and a loop is also connected in parallel in the loop of the condenser (102) and the cooling tower (103), the loop passes through the absorption heat pump (105), and the absorption heat pump (105) can heat the condensed water to 90 ℃.
6. The heat-engine plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 5, characterized in that: and a loop is also connected in parallel in a parallel branch of the loop connecting the condenser (102) and the cooling tower (103), and passes through the preposed compression heat pump (104).
7. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in any one of claims 4, 5 and 6, characterized in that: in the loop connecting the condenser (102) and the cooling tower (103), a loop is also connected in parallel on the branches of the cooling tower (103) and the cooling water pump (103a), and the loop passes through the post-compression heat pump (201).
8. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 7, characterized in that: the regulating water pump (202) provides water source through user return water.
9. The thermal power plant circulating cooling water waste heat comprehensive utilization system according to claim 8, characterized in that: and the output water source of the regulating water pump (202) passes through the rear-mounted compression heat pump (201).
10. The thermal power plant circulating cooling water waste heat comprehensive utilization system as claimed in claim 9, characterized in that: the rear compression heat pump (201) can supply hot water to a user.
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| CN103075841A (en) * | 2013-01-11 | 2013-05-01 | 杭州能源投资管理有限公司 | Novel low-temperature combined cooling, heating and power (CCHP) system based on heat pump |
| CN104197397A (en) * | 2014-09-23 | 2014-12-10 | 大连葆光节能空调设备厂 | Energy-saving heat supply system for decreasing temperature of heating return water and recovering waste heat of thermal power plant |
| CN106382667A (en) * | 2016-08-30 | 2017-02-08 | 山东电力工程咨询院有限公司 | Heat-supply energy-saving system and method for power plant |
| CN206113085U (en) * | 2016-10-20 | 2017-04-19 | 中国神华能源股份有限公司 | A waste heat utilization system and thermal generator set for thermal generator set |
| CN106839513A (en) * | 2017-03-07 | 2017-06-13 | 赫普热力发展有限公司 | Electric power plant circulating water residual heat pump utilizes the energy conserving system combined with natural water accumulation of heat |
| CN109579104A (en) * | 2019-01-15 | 2019-04-05 | 西安热工研究院有限公司 | A kind of heating system that double heat pumps are coupled with thermoelectricity unit and method |
| CN111595065A (en) * | 2020-06-29 | 2020-08-28 | 西安热工研究院有限公司 | Shaft seal overflow steam driven absorption heat pump waste heat recovery device and method |
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