A brewery heating system with fused salt energy storage

Abstract

This utility model discloses a brewery heating system with molten salt energy storage, including a water source heat pump module. The water source heat pump module comprises a first working fluid-water heat exchanger, an expander, a second working fluid-water heat exchanger, a compressor, a water storage tank, a second water pump, and a third water pump. The water source heat pump module is used to convert the low-quality heat from waste hot water generated in the brewery's process into high-quality heat. This utility model addresses the current situation of energy waste and steam demand in breweries by utilizing a water source heat pump module, a molten salt energy storage module, and a steam generation module. It can be designed to take advantage of the availability of off-peak electricity and renewable energy sources, and is equipped with a molten salt electric heater to fully utilize off-peak electricity or renewable energy, reducing steam costs in the industrial park. The heat pump system can recover heat from the waste hot water, improving energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of brewery heating technology, specifically a brewery heating system with molten salt energy storage. Background Technology

[0002] Molten salt energy storage is a sensible heat storage technology that utilizes the temperature difference between molten salt during heating and cooling to store and release energy. The molten salt remains in a liquid state throughout the entire operating temperature range.

[0003] In the brewing process, large amounts of hot water are used for cleaning and sterilization. The low-grade hot water used afterward is often directly discharged, leading to energy waste and environmental pollution. Brewing enterprises require steam for two processes: fermentation and distillation. Currently, most domestic brewing enterprises still use traditional coal-fired, gas-fired, or biomass boilers, which not only pollute the environment but also increase carbon emissions. Considering the high level of abandoned power from wind and solar power in China, and the significant peak-valley electricity price differences in some regions, a solution is proposed: using a molten salt energy storage system to provide steam to brewing enterprises. Combined with a water source heat pump, this can increase the feedwater temperature, improve overall plant efficiency and economic benefits, and reduce carbon emissions and environmental pollution.

[0004] Existing waste heat recovery systems in breweries, such as the one disclosed in CN119702623A (which describes a low-grade hot water recovery and utilization system and method), significantly improve the overall utilization rate of thermal energy by effectively recovering and utilizing low-grade hot water, thereby reducing energy consumption and production costs. The drawback is that while the system can reduce its dependence on high-temperature steam during startup, it still requires an external supply of high-temperature steam and cannot generate its own.

[0005] For example, CN119712270A discloses an integrated energy system and operation method based on the source-grid-load-storage system in a winery park. It constructs a steam supply system consisting of "natural gas + rooftop photovoltaic + rooftop solar thermal + high-temperature water source heat pump + electric steam storage + biogas steam boiler" to achieve energy-saving and emission-reduction technology transformation of the brewing steam heat energy supply system. The disadvantage is that the system involves a relatively complex process system, a large number of equipment, and a large footprint.

[0006] Therefore, there is an urgent need for a brewery heating system with molten salt energy storage to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a brewery heating system with molten salt energy storage to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a brewery heating system with molten salt energy storage, comprising:

[0009] A water source heat pump module, comprising a first working fluid-water heat exchanger, an expander, a second working fluid-water heat exchanger, a compressor, a water storage tank, a second water pump, and a third water pump, wherein the water source heat pump module is used to convert low-quality heat in waste hot water generated in the brewery process into high-quality heat, and the heat will heat the feed water and be stored in the water storage tank.

[0010] A molten salt energy storage module includes a low-temperature molten salt tank, a high-temperature molten salt tank, an in-tank electric heater, a low-temperature molten salt pump, a high-temperature molten salt pump, and a molten salt electric heater. The molten salt energy storage module converts off-peak electricity or renewable green electricity into heat energy and stores it in high-temperature liquid molten salt. The high-temperature molten salt is stored in the high-temperature molten salt tank, and the molten salt electric heater is electrically connected to a transformer for power supply transformation.

[0011] The steam generating module includes a first preheater, an evaporator, a superheater, a second preheater, a deaerator, a feed water pump, a first water pump, a start-up electric heater, and a de-heating and pressure reducing device. The steam generating module transfers heat from the molten salt energy storage module to water to generate high-temperature steam, which is then de-heated and pressure reduced to generate steam for user use.

[0012] In the water source heat pump module, both the first and second working fluid-water heat exchangers are provided with a heat release side inlet, a heat release side outlet, a heat absorption side outlet, and a heat absorption side inlet. The expander is provided with an outlet and an inlet, and the compressor is provided with an inlet and an outlet. The heat release side inlet of the first working fluid-water heat exchanger is connected to the outlet pipe of the brewery's process wastewater. The heat release side outlet of the first working fluid-water heat exchanger is connected to a drainage pipe. The heat absorption side inlet of the first working fluid-water heat exchanger is connected to the expander outlet, and the heat absorption side outlet of the first working fluid-water heat exchanger is connected to the compressor inlet.

[0013] The compressor outlet is connected to the heat release side inlet of the second working fluid-water heat exchanger, the heat release side outlet of the second working fluid-water heat exchanger is connected to the expander inlet, the heat absorption side inlet of the second working fluid-water heat exchanger is connected to the outlet of the first water pump, the heat absorption side outlet of the second working fluid-water heat exchanger is connected to the water storage tank inlet, and the compressor is connected to off-peak electricity or new energy green electricity.

[0014] The water storage tank is equipped with three sets of outlets. The first outlet of the water storage tank is connected to the heat user inlet, the second outlet of the water storage tank is connected to the first water pump, and the third outlet of the water storage tank is connected to the deaerator.

[0015] In the molten salt energy storage module, the cryogenic molten salt pump is connected to the bottom of the cryogenic molten salt tank, the cryogenic molten salt pump is connected to the molten salt electric heater, and the molten salt electric heater is connected to the bottom of the high-temperature molten salt tank.

[0016] In the steam generation module, the evaporator is provided with a first outlet, a second outlet, and a third outlet. The water storage tank is connected to the deaerator, the deaerator is connected to the feed water pump, the deaerator is connected to the second outlet of the evaporator, the deaerator is connected to the second preheater, the feed water pump is connected to the second preheater, the second preheater is connected to the first preheater, the first preheater is connected to the evaporator, the first outlet of the evaporator is connected to the superheater, the second outlet of the evaporator is connected to the heat release side inlet of the second preheater, the third outlet of the evaporator is connected to the deaerator, the starting electric heater is connected to the feed water pump, the starting electric heater is connected to the first preheater, the second water pump is connected to the water storage tank, the second water pump is connected to the desuperheater and pressure reducer, the desuperheater and pressure reducer is connected to the superheater, and the desuperheater and pressure reducer is connected to the steam inlet of the heat user.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention relates to a brewery heating system with molten salt energy storage. Addressing the current situation of energy waste from waste hot water and steam demand in breweries, this system utilizes a water source heat pump module, a molten salt energy storage module, and a steam generation module. It can be designed to take advantage of ample off-peak electricity and renewable energy sources, and is equipped with a molten salt electric heater to fully utilize off-peak electricity or renewable energy, reducing steam costs in the industrial park. The heat pump system can recover heat from waste hot water used in the process, improving energy efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the water source heat pump module of this utility model;

[0021] Figure 3 This is a schematic diagram of the molten salt energy storage module of this utility model;

[0022] Figure 4 This is a schematic diagram of the steam generation module of this utility model.

[0023] In the diagram: 1. Low-temperature molten salt tank; 2. Low-temperature molten salt pump; 3. In-tank electric heater; 4. High-temperature molten salt tank; 5. High-temperature molten salt pump; 6. Molten salt electric heater; 7. First preheater; 8. Evaporator; 9. Superheater; 10. Second preheater; 11. Deaerator; 12. Feed water pump; 13. Start-up electric heater; 14. First water pump; 15. Water storage tank; 16. First working fluid-water heat exchanger; 17. Second working fluid-water heat exchanger; 18. Compressor; 19. Expander; 20. Desuperheater and pressure reducer; 21. Transformer; 22. Second water pump; 23. Third water pump. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a brewery heating system with molten salt energy storage, comprising:

[0026] The water source heat pump module includes a first working fluid-water heat exchanger 16, an expander 19, a second working fluid-water heat exchanger 17, a compressor 18, a water storage tank 15, a second water pump 22, and a third water pump 23. The water source heat pump module is used to convert the low-quality heat in the waste hot water generated by the brewery process into high-quality heat. The heat will heat the feed water and be stored in the water storage tank 15.

[0027] The molten salt energy storage module includes a low-temperature molten salt tank 1, a high-temperature molten salt tank 4, an in-tank electric heater 3, a low-temperature molten salt pump 2, a high-temperature molten salt pump 5, and a molten salt electric heater 6. The molten salt energy storage module converts off-peak electricity or renewable green electricity into heat energy and stores it in high-temperature liquid molten salt. The high-temperature molten salt is stored in the high-temperature molten salt tank 4. The molten salt electric heater 6 is electrically connected to a transformer 21 for power supply transformation.

[0028] The steam generating module includes a first preheater 7, an evaporator 8, a superheater 9, a second preheater 10, a deaerator 11, a feed water pump 12, a first water pump 14, a start-up electric heater 13, and a desuperheating and pressure reducing device 20. The steam generating module transfers the heat from the molten salt energy storage module to the water to generate high-temperature steam, which is then desuperheated and pressure reduced to generate steam for user use.

[0029] It should be noted that this utility model addresses the current situation of energy waste from waste hot water and steam demand in breweries. By utilizing a water source heat pump module, a molten salt energy storage module, and a steam generation module, and taking into account the availability of off-peak electricity and renewable energy green electricity, a heating system can be designed. The molten salt electric heater can fully utilize off-peak electricity or renewable energy green electricity, reducing the cost of steam in the industrial park. The heat pump system can recover heat from the waste hot water in the process, improving energy utilization efficiency.

[0030] In the water source heat pump module, both the first working fluid-water heat exchanger 16 and the second working fluid-water heat exchanger 17 are equipped with a heat release side inlet, a heat release side outlet, a heat absorption side outlet, and a heat absorption side inlet. The expander 19 is equipped with an outlet and an inlet, and the compressor 18 is equipped with an inlet and an outlet. The heat release side inlet of the first working fluid-water heat exchanger 16 is connected to the outlet pipe of the brewery's process wastewater, the heat release side outlet of the first working fluid-water heat exchanger 16 is connected to the drainage pipe, and the heat absorption side inlet of the first working fluid-water heat exchanger 16 is connected to the expander. 19. The heat absorption side outlet of the first working fluid-water heat exchanger 16 is connected to the inlet of the compressor 18; the outlet of the compressor 18 is connected to the heat release side inlet of the second working fluid-water heat exchanger 17; the heat release side outlet of the second working fluid-water heat exchanger 17 is connected to the inlet of the expander 19; the heat absorption side inlet of the second working fluid-water heat exchanger 17 is connected to the outlet of the first water pump 14; the heat absorption side outlet of the second working fluid-water heat exchanger 17 is connected to the inlet of the water storage tank 15; and the compressor 18 is connected to off-peak electricity or new energy green electricity.

[0031] It should be noted that: only the water source heat pump module is operating. At this time, the winery's process system generates waste hot water at about 40°C. The first water pump 14 is started to transport the waste hot water to the second working fluid-water heat exchanger 17. The waste hot water transfers heat to the working fluid, which enters the compressor 18 for compression and heating. Then it enters the first working fluid-water heat exchanger 16 to transfer heat to the feed water. The feed water is transported to the first working fluid-water heat exchanger 16 by the second water pump 22. The hot water generated after absorbing heat is about 80-85°C. The hot water enters the storage tank 15 for storage, and the hot water in the storage tank 15 is supplied to heat users.

[0032] The water storage tank 15 is equipped with three sets of outlets. The first outlet of the water storage tank 15 is connected to the heat user inlet, the second outlet of the water storage tank 15 is connected to the first water pump 14, and the third outlet of the water storage tank 15 is connected to the deaerator 11.

[0033] In the molten salt energy storage module, the low-temperature molten salt pump 2 is connected to the bottom of the low-temperature molten salt tank 1, the low-temperature molten salt pump 2 is connected to the molten salt electric heater 6, and the molten salt electric heater 6 is connected to the bottom of the high-temperature molten salt tank 4.

[0034] It should be noted that when the temperature measuring points of the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 detect a large temperature difference in different areas of the tank, the low-temperature molten salt pump 2 and the high-temperature molten salt pump 5 need to be started to force the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 to circulate the water, so that the temperature of the molten salt in the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 becomes uniform. The molten salt circulation pipes are all equipped with a certain slope to ensure that the molten salt can flow back into the molten salt tank automatically, preventing the molten salt from solidifying in the pipes and causing freezing blockage. When the molten salt heat storage system is not used for a long time, the temperature inside the high-temperature molten salt tank 4 needs to be maintained at about 190°C to prevent the molten salt from solidifying. When the temperature measuring point inside the high-temperature molten salt tank 4 detects a temperature lower than 190°C, the electric heater inside the tank should be started during the nearest off-peak electricity or renewable energy green electricity period to heat the molten salt inside the tank and prevent the molten salt from solidifying.

[0035] It is worth noting that temperature detection on the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 is a conventional technique and is used as a conventional technical means in this application. Its installation location and operation method will not be described in detail here. In addition, the molten salt circulation pipeline is equipped with a certain slope as a conventional technique for reflux. It is used as prior art in this application. Its working principle and installation method will not be described in detail here.

[0036] In the steam generation module, the evaporator 8 is equipped with a first outlet, a second outlet, and a third outlet. The water storage tank 15 is connected to the deaerator 11, which is connected to the feed water pump 12. The deaerator 11 is also connected to the second outlet of the evaporator 8 and the second preheater 10. The feed water pump 12 is connected to the second preheater 10, which is connected to the first preheater 7. The first preheater 7 is connected to the evaporator 8. The first outlet of the evaporator 8 is connected to the superheater... The evaporator 8 is connected to the heat release side inlet of the second preheater 10, the third outlet of the evaporator 8 is connected to the deaerator 11, the starting electric heater 13 is connected to the feed water pump 12, the starting electric heater 13 is connected to the first preheater 7, the second water pump 22 is connected to the water storage tank 15, the second water pump 22 is connected to the desuperheating and pressure reducing device 20, the desuperheating and pressure reducing device 20 is connected to the superheater 9, and the desuperheating and pressure reducing device 20 is connected to the steam inlet of the heat user.

[0037] Working Principle: In the brewery's production process, the bottle washing machine requires a large amount of high-temperature hot water to clean and sterilize the bottles. After cleaning, a large amount of residual hot water, approximately 40°C, is generated. This system is equipped with a water source heat pump system. The working fluid in the water source heat pump system absorbs heat from the waste hot water through the second working fluid-water heat exchanger 17, and then enters the compressor 18 for compression and heating. After the working fluid is heated, the heat is transferred to the feed water through the first working fluid-water heat exchanger 16, heating the feed water to 80-85°C and storing it in the water storage tank 15. Part of the water in the water storage tank 15 can be directly fed into the high-temperature tank of the bottle washing machine to sterilize and disinfect the bottles. The remaining water, used as feedwater for the molten salt energy storage system, enters the deaerator 11 after passing through the feedwater pump 12, and then enters the second preheater 10 for heating, raising the temperature to approximately 190°C. It then enters the first preheater 7 to absorb the heat carried by the high-temperature liquid molten salt, raising the temperature to approximately 220°C. It then enters the evaporator 8 to continue absorbing the heat carried by the high-temperature liquid molten salt, generating saturated steam. It then enters the superheater 9 to continue heating, generating superheated steam. Part of the superheated steam enters the desuperheater and pressure reducer 20 to generate steam that meets the parameters required by the heat user. Part of the superheated steam enters the deaerator 11 to heat the feedwater, and part of the superheated steam enters the second preheater 10 to heat the feedwater.

[0038] The following describes how this heating system works:

[0039] Operating Mode 1: Only the water source heat pump module operates. In this mode, the winery's process system generates waste hot water at approximately 40°C. The first water pump 14 is started to transport the waste hot water to the second working fluid-water heat exchanger 17. The waste hot water transfers heat to the working fluid, which then enters the compressor 18 for compression and temperature increase. It then enters the first working fluid-water heat exchanger 16 to transfer heat to the feed water. The feed water is transported to the first working fluid-water heat exchanger 16 by the second water pump 22. The hot water generated after absorbing heat is approximately 80-85°C. The hot water enters the storage tank 15 for storage, and the hot water in the storage tank 15 is supplied to heat users.

[0040] Operating Mode 2: Only the molten salt energy storage module operates. During off-peak electricity or renewable energy green electricity supply periods, the molten salt electric heater 6 is started, and the cryogenic molten salt pump 2 is started at the same time. The cryogenic molten salt in the cryogenic molten salt tank 1 is pumped to the molten salt electric heater 6. The cryogenic molten salt is heated from 190°C to 400°C using off-peak electricity or renewable energy green electricity. The high-temperature molten salt is then transported to the high-temperature molten salt tank 4 for storage, thereby achieving energy storage.

[0041] Operating Mode 3: Only the steam generating module operates. When the steam generating module starts running, the hot water in the water storage tank 15 enters the deaerator 11 through the water storage tank 15. The deaerator 11 is connected to the feed water pump 12. The hot water enters the start-up electric heater 13 through the feed water pump 12. After being heated to about 190°C, it enters the first preheater 7. At the same time, the high-temperature molten salt pump 5 starts, and the high-temperature molten salt is sequentially transported to the superheater 9, evaporator 8 and the first preheater 7. The high-temperature molten salt transfers heat to the hot water, generating superheated steam at about 220°C. Then, it passes through the desuperheater and pressure reducer 20 and mixes with the hot water transported to the desuperheater and pressure reducer 20 by the first water pump 14 to generate saturated steam or superheated steam with the required parameters for use by heating users. During the start-up process, since superheated steam with stable parameters has not yet been generated, the feed water needs to be heated by the start-up electric heater 13. Once the system starts up and runs stably, it can be switched to operating mode 4.

[0042] Operating Mode 4: Only the steam generation module operates. After the steam generation module has been running for a period of time, it can generate superheated steam with stable parameters. The start-up electric heater 13 can be turned off, and the feedwater can be heated by the saturated steam of about 190°C generated by the evaporator 8. The second outlet of the evaporator 8 is opened, and the saturated steam enters the heat release side inlet of the second preheater 10. The third outlet of the evaporator 8 is opened, and the saturated steam enters the deaerator 11 to heat the feedwater. This process can realize the heat exchange of molten salt heat storage to generate superheated steam.

[0043] Operating Mode 5: Molten Salt Circulation Mode. When the temperature measuring points set in the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 detect a large temperature difference in different areas of the tank (temperature detection is a conventional technology, and in this application, it is a conventional technical means, and its installation location and operation method will not be elaborated here), the low-temperature molten salt pump 2 and the high-temperature molten salt pump 5 need to be started to force the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 to circulate, so that the temperature of the molten salt in the low-temperature molten salt tank 1 and the high-temperature molten salt tank 4 becomes uniform. The molten salt circulation pipeline is equipped with a certain slope to ensure that the molten salt can automatically flow back into the molten salt tank and prevent the molten salt from solidifying in the pipeline and causing freezing blockage.

[0044] Operating Mode 6: Molten Salt Insulation Mode. When the molten salt heat storage system is not used for a long time, the temperature inside the high-temperature molten salt tank 4 needs to be maintained at around 190℃ to prevent the molten salt from solidifying. When the temperature measuring point inside the high-temperature molten salt tank 4 detects that the temperature is lower than 190℃, the electric heater inside the tank will be started during the nearest off-peak electricity or renewable energy green electricity period to heat the molten salt inside the tank and prevent the molten salt from solidifying.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A brewery heating system with molten salt energy storage, characterized in that, include: The water source heat pump module includes a first working fluid-water heat exchanger (16), an expander (19), a second working fluid-water heat exchanger (17), a compressor (18), a water storage tank (15), a second water pump (22), and a third water pump (23). The water source heat pump module is used to convert the low-quality heat in the waste hot water generated by the brewery process into high-quality heat. The heat will heat the feed water and be stored in the water storage tank (15). The molten salt energy storage module includes a low-temperature molten salt tank (1), a high-temperature molten salt tank (4), an in-tank electric heater (3), a low-temperature molten salt pump (2), a high-temperature molten salt pump (5), and a molten salt electric heater (6). The molten salt energy storage module converts off-peak electricity or new energy green electricity into heat energy and stores it in high-temperature liquid molten salt. The high-temperature molten salt is stored in the high-temperature molten salt tank (4). The molten salt electric heater (6) is electrically connected to a transformer (21) for power supply transformation. The steam generating module includes a first preheater (7), an evaporator (8), a superheater (9), a second preheater (10), a deaerator (11), a feed water pump (12), a first water pump (14), a start-up electric heater (13), and a de-heating and pressure reducing device (20). The steam generating module transfers the heat from the molten salt energy storage module to water to generate high-temperature steam, which is then de-heated and pressure reduced to generate steam for user use.

2. A brewery heating system with molten salt energy storage according to claim 1, characterized in that: In the water source heat pump module, the first working fluid-water heat exchanger (16) and the second working fluid-water heat exchanger (17) are each provided with a heat release side inlet, a heat release side outlet, a heat absorption side outlet and a heat absorption side inlet. The expander (19) is provided with an outlet and an inlet. The compressor (18) is provided with an inlet and an outlet. The heat release side inlet of the first working fluid-water heat exchanger (16) is connected to the outlet pipe of the process wastewater of the brewery. The heat release side outlet of the first working fluid-water heat exchanger (16) is connected to the drainage pipe. The heat absorption side inlet of the first working fluid-water heat exchanger (16) is connected to the outlet of the expander (19). The heat absorption side outlet of the first working fluid-water heat exchanger (16) is connected to the inlet of the compressor (18).

3. A brewery heating system with molten salt energy storage according to claim 2, characterized in that: The outlet of the compressor (18) is connected to the heat release side inlet of the second working fluid-water heat exchanger (17), the heat release side outlet of the second working fluid-water heat exchanger (17) is connected to the inlet of the expander (19), the heat absorption side inlet of the second working fluid-water heat exchanger (17) is connected to the outlet of the first water pump (14), the heat absorption side outlet of the second working fluid-water heat exchanger (17) is connected to the inlet of the water storage tank (15), and the compressor (18) is connected to off-peak electricity or new energy green electricity.

4. A brewery heating system with molten salt energy storage according to claim 1, characterized in that: The water storage tank (15) is provided with three sets of outlets. The first outlet of the water storage tank (15) is connected to the heat user inlet, the second outlet of the water storage tank (15) is connected to the first water pump (14), and the third outlet of the water storage tank (15) is connected to the deaerator (11).

5. A brewery heating system with molten salt energy storage according to claim 1, characterized in that: In the molten salt energy storage module, the low-temperature molten salt pump (2) is connected to the bottom of the low-temperature molten salt tank (1), the low-temperature molten salt pump (2) is connected to the molten salt electric heater (6), and the molten salt electric heater (6) is connected to the bottom of the high-temperature molten salt tank (4).

6. A brewery heating system with molten salt energy storage according to claim 1, characterized in that: In the steam generating module, the evaporator (8) is provided with a first outlet, a second outlet, and a third outlet. The water storage tank (15) is connected to the deaerator (11). The deaerator (11) is connected to the feed water pump (12). The deaerator (11) is connected to the second outlet of the evaporator (8). The deaerator (11) is connected to the second preheater (10). The feed water pump (12) is connected to the second preheater (10). The second preheater (10) is connected to the first preheater (7). The first preheater (7) is connected to the evaporator (8). The first outlet of the evaporator (8) is... The evaporator (8) is connected to the superheater (9), the second outlet of the evaporator (8) is connected to the heat release side inlet of the second preheater (10), the third outlet of the evaporator (8) is connected to the deaerator (11), the starting electric heater (13) is connected to the feed water pump (12), the starting electric heater (13) is connected to the first preheater (7), the second water pump (22) is connected to the water storage tank (15), the second water pump (22) is connected to the desuperheater (20), the desuperheater (20) is connected to the superheater (9), and the desuperheater (20) is connected to the steam inlet of the heat user.

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