CN112780371A - Thermoelectric decoupling system and working method - Google Patents
Thermoelectric decoupling system and working method Download PDFInfo
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- CN112780371A CN112780371A CN201911095893.1A CN201911095893A CN112780371A CN 112780371 A CN112780371 A CN 112780371A CN 201911095893 A CN201911095893 A CN 201911095893A CN 112780371 A CN112780371 A CN 112780371A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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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
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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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
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention provides a thermoelectric decoupling system and a working method thereof, which solve the problem that the energy can not be fully utilized due to the limitation of a technical structure in the prior art; the system comprises a power generation unit arranged at a use place; the mixing unit is respectively connected with a main steam outlet and a reheat steam outlet of the power generation unit; the active device is connected with the mixing unit; the thermal cycle unit is respectively connected with the active device and the power generation unit; the heat supply unit is respectively connected with the active device, the thermal cycle unit and the power generation unit; the method comprises the following steps of adjusting a mixing unit, wherein the ratio of high-pressure steam at a high-pressure steam inlet of the mixing unit to low-pressure steam at a low-pressure steam inlet of the mixing unit is 1.2: 1.5; adjusting the total mass of steam entering the mixing unit; adjusting the rotating speed of the driving device and the flow rate of the thermal circulation unit; the thermoelectric decoupling system and the working method provided by the invention have more reasonable structure, and the energy can be utilized in a cascade manner, so that the comprehensive utilization efficiency of the energy is improved.
Description
Technical Field
The invention relates to the field of power generation, in particular to a thermoelectric decoupling system and a working method.
Background
Thermal power generation, which is a power generation mode that thermal energy generated by combustible materials during combustion is converted into electric energy through a power generation power device; the coal-fired power generation is widely applied in China, according to statistics, the annual coal yield of China is about 10 hundred million tons, and about 10 percent of coal is used for combustion power generation;
a large amount of heat can be generated in the process of generating electricity by using a large amount of coal, the thermoelectric decoupling is generated along with the development of the technology, and the maximization of heat use is realized in a thermoelectric decoupling mode;
in the prior art, for better thermoelectric decoupling, equipment such as a steam extraction unit and the like needs to be adopted for corresponding operation, however, due to the limitation of a technical structure, in the using process, the thermoelectric decoupling efficiency is low due to the limitation of factors such as steam extraction pressure and the like, and further, the energy source cannot be fully utilized.
Disclosure of Invention
The invention provides a thermoelectric decoupling system and a working method thereof, which solve the problem that energy cannot be fully utilized due to the limitation of a technical structure in the prior art.
The technical scheme of the invention is realized as follows:
a thermoelectric decoupling system, comprising:
the power generation unit is used for generating electric energy through combustion and generating steam in the combustion process and is arranged at a use place;
the mixing unit is used for receiving the main steam and the reheated steam generated by the power generation unit and mixing the main steam and the reheated steam to form mixed steam; the main steam outlet and the reheat steam outlet of the power generation unit are respectively connected;
the driving device is used for acquiring mixed steam mixed by the mixing unit to act and is connected with the mixing unit;
the thermal cycle unit is driven by the driving device to act, extracts partial heat energy in the power generation unit and is respectively connected with the driving device and the power generation unit;
and the heat supply unit is used for acquiring heat energy in the active device and the heat circulation unit for use and is respectively connected with the active device, the heat circulation unit and the power generation unit.
As a further technical solution, the mixing unit includes:
the steam ejector, main steam governing valve and reheat steam governing valve, main steam governing valve set up between main steam outlet and steam ejector, and the reheat steam governing valve sets up between reheat steam outlet and steam ejector.
Preferably, the steam ejector comprises a high-pressure steam inlet and a low-pressure steam inlet, the high-pressure steam inlet is communicated with the main steam outlet of the power generation unit, and the low-pressure steam inlet is communicated with the reheat steam outlet of the power generation unit.
Preferably, the ratio of the high-pressure steam at the high-pressure steam inlet to the low-pressure steam at the low-pressure steam inlet on the steam ejector is 1.2: 1.5.
preferably, the active device is a back pressure turbine, and an air inlet of the back pressure turbine is communicated with a steam outlet of the mixing unit.
Preferably, the exhaust pressure of the back pressure turbine is 0.3-0.5 MPa.
As a further technical solution, the thermal cycle unit includes:
the heat pump compressor, the heat pump condenser, the heat pump throttle valve and the heat pump evaporator are sequentially connected;
and the heat pump evaporator is connected with the power generation unit, and the heat pump compressor is driven by the driving device to act.
Preferably, the heat pump compressor is coaxially connected to the active device.
As a further technical solution, the heat supply unit includes:
the system comprises a heat supply network heater and a heat supply network circulating water pump, wherein a user side is arranged between the heat supply network heater and the heat supply network circulating water pump, and the heat supply network heater, the user side, the heat supply network circulating water pump and a heat pump evaporator are sequentially connected.
The invention also provides a working method of the thermoelectric decoupling system, which comprises the following steps:
s1, adjusting a mixing unit, wherein the ratio of high-pressure steam at a high-pressure steam inlet of the mixing unit to low-pressure steam at a low-pressure steam inlet of the mixing unit is 1.2: 1.5;
s2, adjusting the total mass of steam entering the mixing unit;
and S3, adjusting the rotation speed of the active device and the flow rate of the thermal circulation unit.
According to the technical scheme, the main steam and the reheated steam generated in the power generation unit can be mixed through the mixing unit and then transmitted to the driving device, after the driving device is driven to act, a part of heat can be transmitted to the heat supply unit for use, the generated kinetic energy can drive the heat circulation unit to act, and the maximization of heat use is realized through the matching of the heat circulation unit and the heat supply unit; compared with the prior art, the structure is more reasonable, the energy can be utilized in a gradient way, and the comprehensive utilization efficiency of the energy is further improved;
in addition, the main steam quantity and the reheat steam quantity can be adjusted according to needs, so that the heat absorption quantity of the heating surface of the boiler in the power generation unit is adjusted, and the safe and stable operation of the boiler is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic plan view of an embodiment of a thermoelectric decoupling system and a working method according to the present invention.
In the figure:
1. a power generation unit; 11. a boiler; 12. a high-pressure cylinder of the steam turbine; 13. a steam turbine medium-low pressure cylinder; 14. a condenser; 15. a condensate pump; 16. a low pressure heater; 17. a deaerator; 18. a feed pump; 19. a high pressure heater; 2. a mixing unit; 21. a steam ejector; 22. a main steam regulating valve; 23. a reheat steam adjusting valve; 3. an active device; 4. a thermal cycling unit; 41. a heat pump compressor; 42. a heat pump condenser; 43. A heat pump throttle valve; 44. a heat pump evaporator; 5. a heat supply unit; 51. a heat supply network heater; 52. a heat supply network circulating water pump; 53. and a user side.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a thermoelectric decoupling system, which includes:
the power generation unit 1 is arranged at a use place, is specifically arranged at a position required by power generation according to actual requirements, generates steam in the combustion process through the power generation unit 1, and generates power through the generated steam; as shown in fig. 1, the power generation unit 1 includes: the system comprises a boiler 11, a turbine high-pressure cylinder 12, a turbine medium-low pressure cylinder 13, a condenser 14, a condensate pump 15, a low-pressure heater 16, a deaerator 17, a feed pump 18 and a high-pressure heater 19;
the mixing unit 2 is respectively connected with a main steam outlet and a reheat steam outlet of the power generation unit 1; receiving part of main steam and part of reheat steam generated by the power generation unit 1 through a mixing unit 2, and mixing the obtained part of main steam and part of reheat steam to form mixed steam; wherein the content of the first and second substances,
the mixing unit 2 includes a steam injector 21, a main steam adjusting valve 22, and a reheat steam adjusting valve 23, the main steam adjusting valve 22 being provided between the main steam outlet and the steam injector 21, and the reheat steam adjusting valve 23 being provided between the reheat steam outlet and the steam injector 21. That is, the steam injector 21 is communicated with the boiler 11 through a pipe, and the main steam adjusting valve 22 and the reheat steam adjusting valve 23 are respectively provided on the pipe communicating the boiler 11 and the steam injector 21;
in the present invention, preferably, the steam ejector 21 includes a high-pressure steam inlet and a low-pressure steam inlet, the high-pressure steam inlet is communicated with the main steam outlet of the power generation unit 1, the low-pressure steam inlet is communicated with the reheat steam outlet of the power generation unit 1, as shown in fig. 1, the high-pressure steam inlet of the steam ejector 21 is communicated with the high-pressure steam outlet provided on the boiler 11, and the low-pressure steam inlet of the steam ejector 21 is communicated with the low-pressure steam outlet provided on the boiler 11; namely, high-pressure steam enters through the high-pressure steam inlet, and low-pressure steam enters through the low-pressure steam inlet; in the present invention, it is preferable that the ratio of the high pressure steam at the high pressure steam inlet to the low pressure steam at the low pressure steam inlet of the steam ejector 21 is 1.2: 1.5.
the driving device 3 is connected with the mixing unit 2, and the mixed steam mixed by the mixing unit 2 is obtained by the driving device 3 to act; in the invention, the driving device 3 is a backpressure steam turbine, and the air inlet of the backpressure steam turbine is communicated with the steam outlet of the mixing unit 2; the mixed steam mixed by the mixing unit 2 (steam ejector 21) is transmitted to the active device 3 to drive the active device 3 to act; preferably, the exhaust pressure of the back pressure turbine is 0.3-0.5 MPa.
The thermal circulation unit 4 is respectively connected with the driving device 3 and the power generation unit 1, and is driven by the driving device 3 to act through the thermal circulation unit 4, and partial heat energy in the power generation unit 1 is extracted; wherein the content of the first and second substances,
the heat cycle unit 4 comprises a heat pump compressor 41, a heat pump condenser 42, a heat pump throttle valve 43 and a heat pump evaporator 44, wherein the heat pump compressor 41, the heat pump condenser 42, the heat pump throttle valve 43 and the heat pump evaporator 44 are connected in sequence;
moreover, the heat pump evaporator 44 is connected with the power generation unit 1, the heat pump compressor 41 is driven by the driving device 3 to operate, and the specific heat pump evaporator 44 is communicated with the condenser 14; in the present invention, preferably, the heat pump compressor 41 is coaxially connected to the driving device 3;
as shown in fig. 1, when the back pressure turbine obtains the steam mixed by the steam injector 21 and then performs work, since the heat pump compressor 41 is coaxially connected with the back pressure turbine, the back pressure turbine drives the heat pump compressor 41 to operate when performing work and rotate, the heat pump compressor 41 drives the pipeline connecting the heat pump condenser 42, the heat pump throttle 43 and the heat pump evaporator 44 to realize circulation, and since the pump evaporator is communicated with the condenser 14, part of the heat with the condenser 14 is circulated at the same time in the circulation process; further, in the circulation process, the heat of the heat pump evaporator 44 and part of the heat of the condenser 14 are transferred to the heat pump condenser 42;
the heat supply unit 5 is respectively connected with the active device 3, the heat circulation unit 4 and the power generation unit 1, and heat energy in the active device 3 and the heat circulation unit 4 is obtained through the heat supply unit 5 for use; wherein the content of the first and second substances,
the heat supply unit 5 comprises a heat supply network heater 51 and a heat supply network circulating water pump 52, a user end 53 is arranged between the heat supply network heater 51 and the heat supply network circulating water pump 52, and the heat supply network heater 51, the user end 53, the heat supply network circulating water pump 52 and the heat pump evaporator 44 are connected in sequence;
as shown in fig. 1, the back pressure turbine obtains the mixed steam after mixing by the steam ejector 21 to act, on one hand, the heat pump compressor 41 which is coaxially connected is driven to act, on the other hand, the used mixed steam enters the heat supply network heater 51, and the water passing through the heat supply network heater 51 is heated because the mixed steam has heat; the user end 53 is arranged between the heat supply network heater 51 and the heat supply network circulating water pump 52, so that when the heat supply network circulating water pump 52 is started, water of the heat supply network heater 51 and the user end 53 can be circulated, and in addition, the heat pump evaporator 44 is also connected in series in the pipeline, so that when the heat supply network circulating water pump 52 is operated, heat in the heat pump evaporator 44 can also heat the water;
as shown in fig. 1, steam (main steam) is generated by combustion in a boiler 11, a part of the main steam is delivered through a pipeline and then supplied to a high-pressure turbine cylinder 12, and another part of the main steam is delivered through a pipeline and then enters a steam injector 21 through a main steam regulating valve 22; part of the steam generated after the operation of the turbine high-pressure cylinder 12 passes through the boiler 11 and becomes reheat steam, and part of the steam enters the high-pressure heater 19; the reheated steam is transmitted, a part of the reheated steam enters the low pressure turbine cylinder 13 for use by the low pressure turbine cylinder 13, and the other part of the reheated steam enters the steam ejector 21 through the reheated steam regulating valve 23;
moreover, a part of the reheated steam generated after the operation of the turbine high-pressure cylinder 12 enters the high-pressure heater 19, is heated by the high-pressure heater 19 and then is transmitted to the boiler 11 for cyclic heating; steam generated after the operation of the turbine intermediate and low pressure cylinder 13 is finished respectively passes through a condenser 14, a low pressure heater 16 and a deaerator 17, is supplemented with water under the action of a condensate pump 15 and a water feed pump 18, is transmitted through a pipeline, and is recycled after passing through a high pressure heater 19;
the main steam and the reheat steam respectively enter the steam ejector 21 through the main steam adjusting valve 22 and the reheat steam adjusting valve 23, are mixed by the steam ejector 21 to form mixed steam, and are transmitted to the back pressure turbine through a pipeline, the mixed steam drives the compressed turbine to do work, and the used mixed steam enters the heat supply network heater 51;
when the back pressure turbine obtains mixed steam mixed by the steam ejector 21 and then works, as the heat pump compressor 41 is coaxially connected with the back pressure turbine, the back pressure turbine can drive the heat pump compressor 41 to act when working and rotating, the heat pump compressor 41 acts to drive the heat pump condenser 42, the heat pump throttle valve 43 and a pipeline connected with the heat pump evaporator 44 to realize circulation, and as the heat pump evaporator 44 is communicated with the condenser 14, part of heat with the condenser 14 can be circulated simultaneously in the circulation process; further, during the cycle, the heat of the heat pump evaporator 44 and part of the heat of the condenser 14 are transferred to the heat pump condenser 42;
the steam generated by the back pressure turbine after producing work enters the heat supply network heater 51; since the steam carries heat, the water passing through the heat net heater 51 is heated; the user end 53 is arranged between the heat supply network heater 51 and the heat supply network circulating water pump 52, so that when the heat supply network circulating water pump 52 is started, water of the heat supply network heater 51 and the user end 53 are circulated, in addition, the heat pump evaporator 44 is also connected in series in a pipeline, when the heat supply network circulating water pump 52 acts, heat in the heat pump evaporator 44 also heats the water, namely, the heat pump compressor 41 drives the heat pump evaporator 44 to participate in circulation, part of heat in the condenser 14 participates in circulation at the same time in the circulation process, and then the heat reaches the position of the heat pump condenser 42, and the water flowing through is heated by the heat pump condenser 42.
The invention also provides a working method of the thermoelectric decoupling system, which comprises the following steps:
adjusting the mixing unit 2, wherein the ratio of the high-pressure steam at the high-pressure steam inlet of the mixing unit 2 to the low-pressure steam at the low-pressure steam inlet is 1.2: 1.5; specifically, the ratio of the high-pressure steam at the high-pressure steam inlet of the steam injector 21 to the low-pressure steam at the low-pressure steam inlet is 1.2 by adjusting the main steam adjusting valve 22 and the reheat steam adjusting valve 23: 1.5; meanwhile, the total mass of the steam entering the mixing unit 2 is adjusted, specifically, the total mass of the steam entering the mixing unit 2 (steam ejector 21) is different due to the different number of the user terminals 53, so that the total mass of the steam entering the mixing unit 2 is adjusted according to actual needs; the rotation speed of the active device 3 and the flow rate of the thermal cycle unit 4 are adjusted, specifically, the rotation speed of the back pressure turbine and the opening of the heat pump throttle 43 in the thermal cycle unit 4 are adjusted, and similarly, the range of the opening of the heat pump throttle 43 is also different because the user side 53 is different and the required heat quantity is different, and therefore, the opening of the heat pump throttle 43 is adjusted according to the actual situation, which is not further limited by the present invention.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A thermoelectric decoupling system, comprising:
a power generation unit (1) for generating electric energy by combustion and generating steam during the combustion, provided at a place of use;
the mixing unit (2) is used for receiving the main steam and the reheated steam generated by the power generation unit (1) and mixing the main steam and the reheated steam to form mixed steam; the main steam outlet and the reheat steam outlet of the power generation unit (1) are respectively connected;
the driving device (3) is used for acquiring mixed steam mixed by the mixing unit (2) to act and is connected with the mixing unit (2);
the thermal cycle unit (4) is driven by the active device (3) to act, extracts partial heat energy in the power generation unit (1), and is respectively connected with the active device (3) and the power generation unit (1);
and the heat supply unit (5) is used for acquiring heat energy in the active device (3) and the heat circulation unit (4) for use, and is respectively connected with the active device (3), the heat circulation unit (4) and the power generation unit (1).
2. The system according to claim 1, characterized in that said mixing unit (2) comprises:
a steam ejector (21), a main steam regulating valve (22), and a reheat steam regulating valve (23), the main steam regulating valve (22) being disposed between the main steam outlet and the steam ejector (21), the reheat steam regulating valve (23) being disposed between the reheat steam outlet and the steam ejector (21).
3. The thermoelectric decoupling system of claim 2, wherein the steam injector (21) comprises a high pressure steam inlet in communication with a main steam outlet of the power generation unit (1) and a low pressure steam inlet in communication with a reheat steam outlet of the power generation unit (1).
4. The thermoelectric decoupling system of claim 3, wherein a ratio of high pressure steam at the high pressure steam inlet to low pressure steam at the low pressure steam inlet on the steam injector (21) is 1.2: 1.5.
5. the system according to claim 1, characterized in that said active device (3) is a back pressure turbine, and the inlet of said back pressure turbine communicates with the steam outlet of said mixing unit (2).
6. A thermal electric decoupling system as in claim 5 wherein the back pressure turbine has an exhaust pressure of 0.3 to 0.5 MPa.
7. The system according to claim 1, characterized in that said thermal cycler unit (4) comprises:
the heat pump system comprises a heat pump compressor (41), a heat pump condenser (42), a heat pump throttle valve (43) and a heat pump evaporator (44), wherein the heat pump compressor (41), the heat pump condenser (42), the heat pump throttle valve (43) and the heat pump evaporator (44) are connected in sequence;
and the heat pump evaporator (44) is connected with the power generation unit (1), and the heat pump compressor (41) is driven by the driving device (3) to act.
8. The thermoelectric decoupling system of claim 7, wherein the heat pump compressor (41) is coaxially connected with the active device (3).
9. The thermoelectric decoupling system of claim 7, wherein the heat supply unit (5) comprises:
the heat pump system comprises a heat supply network heater (51) and a heat supply network circulating water pump, wherein a user end (53) is arranged between the heat supply network heater (51) and the heat supply network circulating water pump, and the heat supply network heater (51), the user end (53), the heat supply network circulating water pump and the heat pump evaporator (44) are sequentially connected.
10. A method of operating a thermoelectric decoupling system as in any of claims 1-9, comprising the steps of:
s1, adjusting a mixing unit, wherein the ratio of high-pressure steam at a high-pressure steam inlet of the mixing unit to low-pressure steam at a low-pressure steam inlet of the mixing unit is 1.2: 1.5;
s2, adjusting the total mass of steam entering the mixing unit;
and S3, adjusting the rotation speed of the active device and the flow rate of the thermal circulation unit.
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