CN213146731U - Multistage utilization device for circulating water waste heat of thermal power plant - Google Patents
Multistage utilization device for circulating water waste heat of thermal power plant Download PDFInfo
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- CN213146731U CN213146731U CN202021267742.8U CN202021267742U CN213146731U CN 213146731 U CN213146731 U CN 213146731U CN 202021267742 U CN202021267742 U CN 202021267742U CN 213146731 U CN213146731 U CN 213146731U
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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]
- Y02B30/12—Hot water central heating systems using heat pumps
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Abstract
The utility model discloses a multistage utilization device for circulating water waste heat of a thermal power plant, which comprises a domestic water heat exchange branch and a heating water heat exchange branch which are connected with a circulating water pipeline of the power plant; the domestic water heat exchange branch comprises a water-water heat exchanger, the water outlet end of the water-water heat exchanger is connected with a high-temperature water source heat pump, and the water outlet end of the high-temperature water source heat pump is connected to a transport vehicle; the heating water heat exchange branch comprises a common water source heat pump, the water outlet end of the common water source heat pump is connected with a high-temperature water source heat pump, and the water outlet end of the high-temperature water source heat pump is connected with the heat exchange station; the circulating water inlet ends of the water-water heat exchanger, the high-temperature water source heat pump and the common water source heat pump are respectively connected to a circulating water pipeline, and the circulating water outlet end is connected to a circulating water pool through a pipeline. The utility model discloses retrieve power plant circulating water low-grade used heat, make it become the hot water that has the use value, rethread pipeline or automobile transportation to user have not only reduced resident's heat cost, have still improved energy utilization.
Description
Technical Field
The utility model relates to a thermal power technical field, especially a thermal power factory circulating water waste heat multi-stage utilization device.
Background
With the strong promotion of coal gas change and coal electricity change in China, the heat consumption cost of units and residents is greatly increased, the fuel cost of directly using coal for heating is about 28.89 yuan/GJ, the fuel cost of using natural gas for heating is about 88.60 yuan/GJ, and the energy cost of using electric heating is about 147.39 yuan/GJ.
Thermal power plants around cities generate a large amount of waste heat during power generation, and the low-grade waste heat is not reused. In order to ensure the recycling of circulating water in a power plant, the circulating water needs to be cooled through a natural ventilation cooling tower, and in the process of evaporating and cooling the circulating water in the natural ventilation cooling tower, heat generated by evaporation is often directly transferred to the air, so that a large amount of heat cannot be utilized, and a large amount of energy is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs solve provides a thermal power factory circulating water waste heat multistage utilization device, can utilize the heat that produces among the circulating water cooling process to unit and resident's heat consumption, reduces the heat cost, improves energy utilization.
In order to solve the technical problem, the utility model adopts the following technical proposal.
The multistage utilization device for the circulating water waste heat of the thermal power plant comprises a domestic water heat exchange branch and a heating water heat exchange branch, wherein the domestic water heat exchange branch is connected to a circulating water pipeline of the thermal power plant through pipelines and used for heating domestic water, and the heating water heat exchange branch is used for heating water; the domestic water heat exchange branch comprises a water-water heat exchanger which is connected to a municipal water pipe and used for heating low-temperature municipal water, the water outlet end of the water-water heat exchanger is connected with a high-temperature water source heat pump used for further heating the heated municipal water, and the water outlet end of the high-temperature water source heat pump is connected to a transport vehicle used for transporting the high-temperature water to each heat consumption unit; the heating water heat exchange branch comprises a common water source heat pump which is connected to a heating return water pipe and used for heating return water, the water outlet end of the common water source heat pump is connected with a high-temperature water source heat pump used for further heating the heated heating return water, and the water outlet end of the high-temperature water source heat pump is connected to the heat exchange station through a pipeline; the circulating water inlet ends of the water-water heat exchanger, the high-temperature water source heat pump and the common water source heat pump are respectively connected to a circulating water pipeline through pipelines, and the circulating water outlet end is connected to a circulating water pool through a pipeline.
In the multistage circulating water waste heat utilization device for the thermal power plant, the working medium of the common water source heat pump is R22.
In the multistage circulating water waste heat utilization device for the thermal power plant, the working medium of the high-temperature water source heat pump is R134 a.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses retrieve power plant circulating water low-grade used heat, make it become the hot water that has the use value, rethread pipeline or automobile transportation to user are good for the people, retrieve exothermic in-process at the circulating water, and the temperature of circulating water reduces, has not only reduced resident's heat cost, has still improved energy utilization.
Drawings
Fig. 1 is a schematic structural view of the present invention;
wherein: 1. the system comprises a water-water heat exchanger, 2. a high-temperature water source heat pump, 3. a circulating water pool and 4. a common water source heat pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The multistage circulating water waste heat utilization device for the thermal power plant is structurally shown in figure 1 and comprises a domestic water heat exchange branch and a heating water heat exchange branch. The domestic water heat exchange branch is used for heating the domestic water, the heating water heat exchange branch is used for heating the heating water return water, and the domestic water heating branch and the heating water heating branch are connected to a circulating water pipeline of a power plant through pipelines.
The domestic water heating branch comprises a water-water heat exchanger 1 and a high-temperature water source heat pump 2. The water pipe heat pump is a plate type heat exchange device, and heat transfer from high-temperature water to low-temperature water is realized through a thin steel plate. Wherein the water inlet end of the high-temperature water is connected to the circulating water pipeline of the power plant through a pipeline, the water outlet end of the high-temperature water is connected to the circulating water tank 3 through a pipeline, the water inlet end of the low-temperature water is connected to the municipal water pipe, and the water outlet end of the low-temperature water is connected to the high-temperature water source heat pump 2.
The high temperature water source heat pump 2 is used for further heating the domestic water after the water heat exchanger 1 heats, the end of intaking of high temperature water source heat pump 2 is connected on water heat exchanger 1, goes out the water end and connects on transport vehicle, transports the domestic water after the heating to each unit of using heat through transport vehicle, and the circulating water intake end of high temperature water source heat pump 2 is connected on power plant circulating water pipeline, and the water outlet end of circulating water passes through the pipe connection on circulating water pond 3. The high-temperature water source heat pump 2 adopts an R134a working medium, and can directly recover low-grade residual (waste) heat resources at 30-50 ℃ to produce hot water at 85-95 ℃.
The domestic water heat exchange process flow comprises the following steps: the municipal low-temperature water with the temperature of 10 ℃ absorbs the heat of circulating water through a first-level plate type water-water heat exchanger 1 and is heated to 30 ℃, then absorbs the heat through a second-level high-temperature water-source heat pump 2 (working medium R134a) and is heated to 85 ℃, and finally the water is conveyed to each heat consumption unit of a city through a vehicle.
The heating water heat exchange branch comprises a common water source heat pump 4 and a high-temperature water source heat pump 2. The common water source heat pump 4 is used for heating water return water, the water inlet end of the common water source heat pump 4 is connected to a heating water return pipe, the water outlet end of the common water source heat pump 4 is connected to the high-temperature water source heat pump 2, the circulating water inlet end of the common water source heat pump 4 is connected to a circulating water pipeline of a power plant through a pipeline, and the circulating water outlet end is connected to the circulating water pool 3. The common water source heat pump 4 adopts an R22 working medium, can directly recover low-grade residual (waste) heat resources at 20-50 ℃ and produce hot water at the temperature of not more than 65 ℃.
The high-temperature water source heat pump 2 is used for further heating the heating water backwater heated by the common water source heat pump 4, the water inlet end of the high-temperature water source heat pump 2 is connected to the common water source heat pump 4, the water outlet end of the high-temperature water source heat pump 2 is connected to the heat exchange station, the circulating water inlet end of the high-temperature water source heat pump 2 is connected to the circulating water pipeline of the power plant, and the water outlet end of the circulating water is connected to the circulating water pool 3. The high-temperature water source heat pump 2 adopts an R134a working medium, and can directly recover low-grade residual (waste) heat resources at 30-50 ℃ to produce hot water at 85-95 ℃.
The heat exchange process flow of heating water comprises the following steps: heating primary network backwater at 50 ℃ is carried out, heat is absorbed by a primary common water source heat pump 4 (working medium R22) and is heated to 65 ℃, then heat is absorbed by a secondary high-temperature water source heat pump 2 (working medium R134a) and is heated to 95 ℃, and finally the heat is conveyed to each secondary heat exchange station of a city through a pipeline.
The heat absorbed by the high-temperature water source heat pump 2 and the common water source heat pump 4 is the low-temperature waste heat of the circulating water at the temperature of 43 ℃ in the power plant; after the 43 ℃ circulating water of the power plant releases heat, the temperature is reduced to 30 ℃, and then the circulating water enters the circulating water pool 3 for the steam turbine generator set to be recycled.
Claims (3)
1. Multistage utilization apparatus of thermal power factory circulating water waste heat, its characterized in that: the system comprises a domestic water heat exchange branch and a heating water heat exchange branch, wherein the domestic water heat exchange branch is connected to a circulating water pipeline of a power plant through a pipeline and is used for heating domestic water, and the heating water heat exchange branch is used for heating water; the domestic water heat exchange branch comprises a water-water heat exchanger (1) which is connected to a municipal water pipe and used for heating low-temperature municipal water, the water outlet end of the water-water heat exchanger (1) is connected with a high-temperature water source heat pump (2) used for further heating the heated municipal water, and the water outlet end of the high-temperature water source heat pump (2) is connected to a transport vehicle used for transporting the high-temperature water to each heat consumption unit; the heating water heat exchange branch comprises a common water source heat pump (4) connected to a heating return water pipe and used for heating return water, the water outlet end of the common water source heat pump (4) is connected with a high-temperature water source heat pump (2) used for further heating the heated heating return water, and the water outlet end of the high-temperature water source heat pump (2) is connected to a heat exchange station through a pipeline; circulating water inlet ends of the water-water heat exchanger (1), the high-temperature water source heat pump (2) and the common water source heat pump (4) are respectively connected to a circulating water pipeline through pipelines, and circulating water outlet ends are respectively connected to a circulating water pool (3) through pipelines.
2. The multi-stage utilization device for the waste heat of the circulating water of the thermal power plant according to claim 1, characterized in that: the working medium of the common water source heat pump (4) is R22.
3. The multi-stage utilization device for the waste heat of the circulating water of the thermal power plant according to claim 1, characterized in that: the working medium of the high-temperature water source heat pump (2) is R134 a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021267742.8U CN213146731U (en) | 2020-07-01 | 2020-07-01 | Multistage utilization device for circulating water waste heat of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021267742.8U CN213146731U (en) | 2020-07-01 | 2020-07-01 | Multistage utilization device for circulating water waste heat of thermal power plant |
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| Publication Number | Publication Date |
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| CN213146731U true CN213146731U (en) | 2021-05-07 |
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| CN202021267742.8U Active CN213146731U (en) | 2020-07-01 | 2020-07-01 | Multistage utilization device for circulating water waste heat of thermal power plant |
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| CN (1) | CN213146731U (en) |
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- 2020-07-01 CN CN202021267742.8U patent/CN213146731U/en active Active
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