High-temperature heat pump steam generation device based on composite enthalpy increase

Abstract

The utility model relates to a steam generation device, in particular to a high-temperature heat pump steam generation device based on composite enthalpy increase, which comprises an indirect compression enthalpy increase subsystem, a direct compression enthalpy increase subsystem, a water circulation system and a hot water supply system, the indirect compression enthalpy increasing subsystem is used for producing cold water and providing a heat source for the water circulation system; the direct compression enthalpy increasing subsystem comprises a separator, a steam compressor and a steam storage tank which are communicated in sequence, the separator can complete gas-liquid separation to form low-temperature and low-pressure steam and liquid water, the low-temperature and low-pressure steam is compressed into high-temperature and high-pressure steam through the steam compressor, and the high-temperature and high-pressure steam is stored in the steam storage tank; the water circulation system is used for heating and evaporating liquid water in the separator to a gas-liquid coexistence state; and the hot water supply system is used for storing the high-temperature hot water in the separator. The steam generator can replace an electric boiler, reduces carbon emission while generating steam, can be combined with new energy such as wind energy and solar energy, and consumes new energy electric power.

Description

Technical Field

[0001] This utility model relates to the field of steam generation device technology, and in particular to a high-temperature heat pump steam generation device based on composite enthalpy enhancement. Background Technology

[0002] The working principle of a steam boiler is that fuel (such as coal, natural air, or biological material) is burned in the combustion chamber to produce high-temperature flue gas. This flue gas flows around water pipes in the furnace wall, heating the water and converting it into steam through heat transfer. This primary steam formation is then directed to equipment or systems that require steam, providing heat or power to industrial processes. After the steam has transferred heat, it cools, escapes back into water, and is reheated and recycled.

[0003] Existing steam boilers convert the energy from the combustion of electricity, oil, or gas into heat energy, which is at most equivalent to the energy released during combustion or the energy provided by electricity. Water source heat pump water heaters and air source heat pump water heaters utilize heat pump technology for heat transfer, and in current technology, they generally heat water to around 70°C, which is insufficient to reach boiling point. Since current industrial power requires high-temperature, high-pressure steam, this energy cannot be effectively utilized when boiling is not achieved. Therefore, some boilers employ a second-stage electric heating method to achieve high-temperature steam output. If heat pump technology is used to heat the water to 70°C first, and then other energy sources are used to heat the boiler, the energy efficiency ratio is significantly reduced.

[0004] Traditional electric, oil, and gas-fired steam boilers in existing technologies share common drawbacks, including low energy efficiency, inability to utilize environmental energy sources, and ineffective use of wastewater, factory emissions, ambient hot water, and hot water from solar water heaters, while also contributing to carbon emissions. Hybrid boilers combining heat pumps with traditional electric, oil, and gas heating methods suffer from low energy efficiency, high cost, complex operation, and high noise levels. Furthermore, existing boilers, which heat water to produce steam, have a simple and direct heating method that can easily lead to a continuous rise in internal pressure. In the event of a boiler malfunction, this pressure buildup can cause explosions and other accidents, posing a significant threat to the surrounding environment and operators.

[0005] Therefore, it is necessary to provide a high-temperature heat pump steam generator based on composite enthalpy enhancement to solve at least one of the above problems. Utility Model Content

[0006] This invention provides a high-temperature heat pump steam generator based on composite enthalpy enhancement, which solves the problem of high pollution caused by direct electric drive in the prior art and achieves pollution reduction.

[0007] This utility model provides a high-temperature heat pump steam generator based on composite enthalpy enhancement, comprising:

[0008] Indirect compression enthalpy enhancement subsystem, direct compression enthalpy enhancement subsystem, water circulation system and hot water supply system;

[0009] The indirect compression enthalpy-increasing subsystem is used to produce cold water and provide a heat source for the water circulation system;

[0010] The direct compression enthalpy enhancement subsystem includes a separator, a steam compressor, and a steam storage tank connected in sequence. The separator can perform gas-liquid separation to form low-temperature, low-pressure steam and liquid water. The low-temperature, low-pressure steam is compressed into high-temperature, high-pressure steam by the steam compressor, and the high-temperature, high-pressure steam is stored in the steam storage tank.

[0011] The water circulation system connects the indirect compression enthalpy-increasing subsystem and the separator, and the water circulation system is used to heat and evaporate the liquid water in the separator to a gas-liquid coexistence state;

[0012] The hot water supply system is used to store the high-temperature hot water in the separator and produce hot water.

[0013] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided. The indirect compression enthalpy enhancement subsystem includes an evaporator, a heat pump compressor, a condenser, and a throttling valve connected in sequence. The evaporator is connected to an external heat source, which enters the evaporator to exchange heat with the liquid working fluid. The liquid working fluid is heated and evaporated into a vapor working fluid. The vapor working fluid is isentropically compressed by the heat pump compressor into superheated vapor. The superheated vapor enters the condenser to heat the water in the water circulation system. The superheated vapor that has completed heat exchange condenses into a liquid working fluid and enters the throttling valve. The condensed working fluid is cooled and depressurized by the throttling valve and then enters the evaporator to complete the circulation of the working fluid.

[0014] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided. The direct compression enthalpy enhancement subsystem further includes a filter. The inlet of the filter is connected to the separator, and the outlet of the filter is connected to the steam compressor. The filter is used to filter out the liquid water mixed in the steam, and the filtered low-temperature and low-pressure steam enters the steam compressor.

[0015] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided, wherein the steam storage tank is further connected to a steam replenishment valve, which is used to provide steam replenishment to the steam storage tank.

[0016] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided. The steam compressor further includes a self-lubricating water spray module. The self-lubricating water spray module includes a water spray valve and a water spray pump. The separator, the water spray valve, the water spray pump and the steam compressor are connected in sequence to form a circuit. When the self-lubricating water spray module is running, the water spray valve opens, and the water spray pump draws water from the separator into the steam compressor to lubricate the steam compressor. The lubricated water is then returned to the separator.

[0017] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided. The steam compressor further includes an oil supply module, which includes an oil tank, an oil supply regulating valve, and an oil supply pump. The oil tank, the oil supply regulating valve, the oil supply pump, and the steam compressor are connected in sequence to form a circuit. When the oil supply module is running, the oil supply regulating valve opens, and the oil supply pump draws lubricating oil from the oil tank to supply lubricating oil to the oil lubrication components inside the steam compressor. The lubricated oil then returns to the oil tank.

[0018] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided. The hot water supply system includes a hot water valve, a hot water pump and a water storage tank connected in sequence. The hot water valve is connected to the separator, and the high-temperature hot water in the separator is drawn into the water storage tank by the hot water pump.

[0019] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided, which further includes a data acquisition module and a control cabinet. The data acquisition module is used to acquire real-time parameters. The control cabinet is provided with a protection parameter range. When the real-time parameters exceed the protection parameter range, the control cabinet controls the indirect compression enthalpy enhancement subsystem, the direct compression enthalpy enhancement subsystem, the water circulation system, and the hot water supply system to stop working.

[0020] According to the present invention, a high-temperature heat pump steam generator based on composite enthalpy enhancement is provided, wherein the working fluid in the evaporator is one of CO2, R134a, R245fa, and water.

[0021] According to the high-temperature heat pump steam generator based on composite enthalpy enhancement provided by this utility model, the data acquisition module is used to collect at least one of the following: measurement point layout, temperature, pressure, liquid level, and flow rate.

[0022] This invention provides a high-temperature heat pump steam generator based on composite enthalpy enhancement. It generates cold water and provides a heat source for a water circulation system through an indirect compression enthalpy enhancement subsystem. A separator in the direct compression enthalpy enhancement subsystem separates the gas and liquid, forming low-temperature, low-pressure steam and liquid water. The low-temperature, low-pressure steam is compressed into high-temperature, high-pressure steam by a steam compressor and stored in a steam tank. The water circulation system connects the indirect compression enthalpy enhancement subsystem and the separator, heating and evaporating the liquid water in the separator to a gas-liquid coexistence state. The hot water supply system stores the high-temperature hot water in the separator, producing hot water. This invention reduces carbon emissions by generating steam simultaneously, promoting a dual-carbon strategy. Furthermore, it can be combined with new energy sources such as wind and solar power to absorb renewable energy electricity. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structural principle of the high-temperature heat pump steam generator based on composite enthalpy enhancement provided by this utility model.

[0025] Figure label:

[0026] 1. Indirect compression enthalpy-increasing subsystem; 2. Direct compression enthalpy-increasing subsystem; 3. Water circulation system; 4. Hot water supply system; 11. Evaporator; 12. Heat pump compressor; 13. Throttling valve; 14. Condenser; 21. Separator; 22. Filter; 23. Steam compressor; 24. Water spray valve; 25. Water spray pump; 26. Oil tank; 27. Oil supply regulating valve; 28. Oil supply pump; 29. ​​Steam storage tank; 30. Steam replenishment valve; 31. Circulation pump; 41. Hot water valve; 42. Hot water pump; 43. Water storage tank; 51. Control cabinet; T1. Oil tank temperature sensor; L1. Oil tank level sensor; P1. Oil supply pressure sensor; T2. Separator temperature sensor; L2. Separator level sensor; P2. Separator pressure sensor; F1. Water spray flow sensor; T3. Steam storage tank temperature sensor; P3. Steam storage tank pressure sensor; L3. Water storage tank level sensor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] The following is combined Figure 1 The first aspect of the present invention describes a high-temperature heat pump steam generator based on composite enthalpy enhancement, comprising an indirect compression enthalpy enhancement subsystem 1, a direct compression enthalpy enhancement subsystem 2, a water circulation system 3, and a hot water supply system 4.

[0030] The indirect compression enthalpy-increasing subsystem 1 is used to produce cold water and provide a heat source for the water circulation system 3.

[0031] The direct compression enthalpy-increasing subsystem 2 includes a separator 21, a steam compressor 23, and a steam storage tank 29 connected in sequence. The separator 21 can separate gas and liquid to form low-temperature, low-pressure steam and liquid water. The low-temperature, low-pressure steam is compressed into high-temperature, high-pressure steam by the steam compressor 23, and the high-temperature, high-pressure steam is stored in the steam storage tank 29. The water circulation system 3 connects the indirect compression enthalpy-increasing subsystem 1 and the separator 21. The water circulation system 3 is used to heat and evaporate the liquid water in the separator 21 to a gas-liquid coexistence state. The hot water supply system 4 is used to store the high-temperature hot water in the separator 21 and produce hot water, which can reduce carbon emissions. It reduces carbon emissions while generating steam, promotes the dual-carbon strategy, and can be combined with new energy sources such as wind and solar energy to absorb new energy power.

[0032] In one feasible embodiment of this utility model, the indirect compression enthalpy-increasing subsystem 1 includes an evaporator 11, a heat pump compressor 12, a condenser 14, and a throttling valve 13 connected in sequence. The makeup water in the separator 21, under the action of the water circulation system 3, circulates and is heated and evaporates between the condenser 14 and the separator 21. The heat source in the condenser 14 is provided by the indirect compression enthalpy-increasing subsystem 1. The evaporator 11 is connected to an external heat source, which enters the evaporator 11 to exchange heat with the liquid working fluid. The liquid working fluid is heated and evaporated into a vapor working fluid. After the heat exchange is completed, it becomes cooling water, which can provide cooling water for the production process as needed. The vapor working fluid enters the heat pump compressor 12, where it is isentropically compressed into superheated vapor. The superheated vapor enters the condenser 14 to complete the water heating in the water circulation system 3. The superheated vapor, having completed the heat exchange, condenses into a liquid working fluid and enters the throttling valve 13. The condensed working fluid is cooled and depressurized by the throttling valve 13 before entering the evaporator 11, completing the working fluid circulation.

[0033] In the water circulation system 3, the liquid water and superheated steam exchange heat and are then heated and evaporated into a steam-water mixture, which enters the separator 21. The steam-water mixture undergoes gas-liquid separation in the separator 21. The liquid water continues to circulate in the separator 21 and the condenser 14 under the action of the water circulation system 3.

[0034] In one feasible embodiment of this invention, the direct compression enthalpy-increasing subsystem 2 further includes a filter 22. The inlet of the filter 22 is connected to the separator 21, and the outlet of the filter 22 is connected to the steam compressor 23. The filter 22 is used to filter out the liquid water mixed in the steam. The filtered low-temperature, low-pressure steam enters the steam compressor 23. The low-temperature, low-pressure steam enters the filter 22, filters out the liquid water mixed in the steam, and the filtered low-temperature, low-pressure steam enters the steam compressor 23. The steam compressor 23 compresses the filtered low-temperature, low-pressure steam into high-temperature, high-pressure steam and stores it in the steam storage tank 29.

[0035] Regarding the selection of the steam compressor 23, if the required output is steam below 130℃ and the compression ratio of the steam is less than 2.5, a Roots-type steam compressor is recommended; if the required output is steam above 130℃ or the compression ratio is greater than 2.5, a screw-type steam compressor is recommended.

[0036] For the selection of heat exchanger type in indirect compression enthalpy-increasing subsystem 1 and direct compression enthalpy-increasing subsystem 2, plate heat exchangers are recommended if the working fluid is pure and there is no risk of crystallization or precipitation near the operating conditions.

[0037] In one feasible embodiment of this utility model, the steam storage tank 29 is also connected to a steam replenishment valve 30, which is used to provide steam replenishment to the steam storage tank 29. The steam replenishment valve 30 can be opened to provide steam according to steam demand.

[0038] In one feasible embodiment of this utility model, the steam compressor 23 further includes a self-lubricating water spray module. The self-lubricating water spray module includes a water spray valve 24 and a water spray pump 25. The separator 21, water spray valve 24, water spray pump 25, and steam compressor 23 are connected in sequence to form a circuit. To prevent the water in the separator 21 from vaporizing after passing through the water spray pump 25, the head of the water spray pump 25 is above 10m. A separator level sensor L2 is installed on the separator 21 to monitor and control the level of the separator 21 in real time based on the collected level data. A water spray flow sensor F1 is installed at the outlet of the water spray valve 24 to monitor and control the water spray flow in real time based on the collected flow data. When the self-lubricating water spray module is running, the water spray valve 24 is opened, and the water spray pump 25 draws water from the separator 21 into the steam compressor 23 to lubricate the steam compressor 23. The lubricated water is then returned to the separator 21.

[0039] It should be noted that the lubricating components inside the steam compressor 23 typically include parts such as the star wheel, rotor, and cavity.

[0040] In one feasible embodiment of this utility model, the steam compressor 23 further includes an oil supply module, which includes an oil tank 26, an oil supply regulating valve 27, and an oil supply pump 28. The oil tank 26, the oil supply regulating valve 27, the oil supply pump 28, and the steam compressor 23 are connected in sequence to form a circuit. The oil tank 26 supplies lubricating oil to the steam compressor 23. When the oil supply module is running, the oil supply regulating valve 27 opens, and the oil supply pump 28 draws lubricating oil from the oil tank 26 into the steam compressor 23 to supply lubricating oil to the oil-lubricated components inside the steam compressor 23. The lubricated oil then returns to the oil tank 26. The oil-lubricated components of the steam compressor 23 include mechanical seals and bearings.

[0041] More specifically, the outlet pressure of the oil supply pump 28 should be between 4 and 10 bar; the lubricating oil in the oil tank 26 should be No. 32 or No. 46 turbine oil, and the oil temperature should be controlled below 80°C; a temperature sensor T1 is installed on the oil tank 26 to monitor and control the oil temperature in the oil tank 26 in real time based on the collected temperature data, and an oil tank level sensor L1 is installed on the oil tank 26 to monitor and control the oil level in the oil tank 26 in real time based on the collected level data; an oil supply pressure sensor P1 is installed at the outlet of the oil supply pump 28 to monitor and control the oil supply pressure in real time based on the collected pressure data; a heat exchange coil is installed inside the oil tank 26, with a diameter between 19 and 38 mm, and cooling water flows inside the coil to cool and reduce the oil temperature in the oil tank 25 and recover the waste heat of the lubricating oil.

[0042] In one feasible embodiment of the present invention, the hot water supply system 4 includes a hot water valve 41, a hot water pump 42 and a water storage tank 43 connected in sequence. The hot water valve 41 is connected to the separator 21, and the high-temperature hot water in the separator 21 is drawn into the water storage tank 43 by the hot water pump 42.

[0043] The cooling water after heat exchange and cooling by the low-temperature heat source in the indirect compression enthalpy enhancement subsystem 1 can provide cold water for other production processes. The hot water stored in the water storage tank 43 in the hot water supply system 4 can provide hot water for other production processes. The high-temperature and high-pressure steam stored in the steam storage tank 29 in the direct compression enthalpy enhancement subsystem 2 can provide steam for other production processes.

[0044] In one feasible embodiment of this utility model, a data acquisition module and a control cabinet 51 are also included. The data acquisition module is used to acquire real-time parameters, including at least one of temperature, pressure, liquid level, and flow rate. The control cabinet 51 is equipped with a protection parameter range. When the real-time parameters exceed the protection parameter range, the control cabinet 51 controls the indirect compression enthalpy enhancement subsystem 1, the direct compression enthalpy enhancement subsystem 2, the water circulation system 3, and the hot water supply system 4 to stop working.

[0045] Specifically, separator 21 is connected to separator temperature sensor T2, separator pressure sensor P2, and separator level sensor L2. Separator temperature sensor T2, separator pressure sensor P2, oil supply pressure sensor P1, and oil tank level sensor L1 are connected to control cabinet 51 to realize data acquisition and monitoring. When the monitored data exceeds the set requirements, an alarm is issued. When it deviates further from the set value, the operation of steam compressor 23 is stopped to protect steam compressor 23.

[0046] The oil tank 26 is connected to an oil supply pressure sensor P1 and an oil supply regulating valve 27, which are connected to the control system. This enables pressure data acquisition and monitoring, as well as pressure regulation. When the oil supply pressure data is higher than the set value, the control system calculates and issues a command to reduce the opening of the oil supply regulating valve 27. When the oil supply pressure data is lower than the set value, the control system calculates and issues a command to increase the opening of the oil supply regulating valve 27, ensuring that the oil supply pressure is maintained at the set level.

[0047] The steam storage tank 29 is connected to a steam storage tank temperature sensor T3 and a steam storage tank pressure sensor P3. The steam storage tank temperature sensor T3 and the steam storage tank pressure sensor P3 are connected to the control system to realize data acquisition and monitoring. When the monitored data exceeds the set requirements, an alarm is issued. When it deviates further from the set value, the steam replenishment valve 30 is opened to release steam or the operation of the steam compressor 23 is stopped directly to protect the steam compressor 23.

[0048] The water storage tank 43 is connected to a water level sensor L3, which is connected to the control system to collect and monitor data. When the monitored water level exceeds the set requirements, an alarm is issued. When it deviates further from the set value, the hot water pump is stopped.

[0049] In other words, water spray protection, oil supply pressure protection, Roots compressor temperature protection, and working fluid temperature protection can be achieved through control cabinet 51. The system automatically stops the compressor when the water spray flow rate is lower than the protection value. The system automatically stops the compressor when the oil supply pressure is lower than the protection value; the system automatically stops the Roots compressor when the temperature is higher than the protection value. The system also shuts down when the temperatures of R134a, R245fa, and CO2 working fluids are higher or lower than the protection values.

[0050] Furthermore, the control system can utilize PID control technology and PLC control to monitor and intelligently control the process parameters of each part of the device in real time, making the control of the device more flexible, enabling the working processes of each part to cooperate with each other, and improving the reliability of the device.

[0051] The high-temperature heat pump steam generator based on composite enthalpy enhancement provided by this utility model can adjust the compressor to match specific needs according to steam pressure and flow rate, and can be used for multiple purposes, including simultaneous cold, heat and steam co-production; in addition, when producing high-temperature steam, a compression enthalpy enhancement subsystem with the corresponding temperature range can be selected according to the working conditions.

[0052] In this embodiment of the invention, the steam output is 1 t / h, the makeup water flow rate is 1 t / h, and the working fluid is R245fa. The indirect compression enthalpy enhancement subsystem can heat the gas-liquid mixture in the separator to 115°C, while the direct compression enthalpy enhancement subsystem can compress the 115°C steam in the separator into 150°C water vapor. In the indirect compression enthalpy enhancement subsystem, the condenser is preferably a plate heat exchanger, preferably made of 304 stainless steel, and the heat exchange area of ​​the condenser is preferably 131 m². 2 The evaporator is preferably a plate evaporator, preferably made of 304 stainless steel, and the heat exchange area of ​​the evaporator is preferably 140 m². 2The axial flow velocity of the steam in the separator is controlled below 1 m / s. A single-screw compressor is preferred for the heat pump compressor, capable of achieving a compression ratio of 10 and a temperature rise of 30-80℃. In the direct compression enthalpy-increasing subsystem, the separator level sensor L2 is preferably a differential pressure level gauge, and the steam compressor is preferably a Roots-type steam compressor with a compression ratio of 1.2-3.0. The water injection valve 24 and oil supply regulating valve 27 are preferably electric regulating valves, connected to the control system to adjust valve opening according to system settings. The steam replenishment valve 30 is preferably an electric on / off valve, connected to the control system to control valve opening and closing according to system settings. The oil tank level sensor L1 is preferably a magnetic float level gauge, and the circulating pump power is preferably 5.5 kW. For the kW pump, a vertical multistage centrifugal pump is preferred. For the water storage tank level sensor L3, a magnetic float level gauge is preferred. For the Roots-type steam compressor, rubber shock-absorbing pads are preferred. For compressor temperature monitoring, temperature sensors are preferred to be installed at the bearings and oil tank. Thermistor sensors are preferred.

[0053] In this embodiment of the invention, the total energy consumption of the steam generator based on composite enthalpy enhancement for one year is 2377.642 MW·h, while the total energy consumption of the pure electric system for one year is 3572.2 MW·h. Compared with the pure electric system, the composite enthalpy enhancement system saves 33.4% of energy, demonstrating significant energy-saving effect.

[0054] In one feasible embodiment of this utility model, the working fluid in the evaporator 11 is one of CO2, R134a, R245fa, and water. Due to the system's adaptability to waste heat temperature, different working fluids can be selected for the indirect compression enthalpy-increasing subsystem 1. If the waste heat temperature range is between -30°C and 10°C, a CO2 heat pump is recommended; if the waste heat temperature range is between 10°C and 40°C, R134a is recommended; if the waste heat temperature range is between 40°C and 70°C, R245fa is recommended; and if the waste heat temperature range is above 70°C, water is recommended.

[0055] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-temperature heat pump steam generator based on composite enthalpy enhancement, characterized in that, It includes an indirect compression enthalpy enhancement subsystem (1), a direct compression enthalpy enhancement subsystem (2), a water circulation system (3), and a hot water supply system (4); The indirect compression enthalpy-increasing subsystem (1) is used to produce cold water and provide a heat source for the water circulation system (3); The direct compression enthalpy-increasing subsystem (2) includes a separator (21), a steam compressor (23), and a steam storage tank (29) connected in sequence. The separator (21) can complete gas-liquid separation to form low-temperature low-pressure steam and liquid water. The low-temperature low-pressure steam is compressed into high-temperature high-pressure steam by the steam compressor (23), and the high-temperature high-pressure steam is stored in the steam storage tank (29). The water circulation system (3) connects the indirect compression enthalpy-increasing subsystem (1) and the separator (21). The water circulation system (3) is used to heat and evaporate the liquid water in the separator (21) to a gas-liquid coexistence state. The hot water supply system (4) is used to store the high-temperature hot water in the separator (21) and produce hot water.

2. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 1, characterized in that, The indirect compression enthalpy-increasing subsystem (1) includes an evaporator (11), a heat pump compressor (12), a condenser (14), and a throttling valve (13) connected in sequence. The evaporator (11) is connected to an external heat source. The external heat source enters the evaporator (11) to exchange heat with the liquid working fluid. The liquid working fluid is heated and evaporated into a vapor working fluid. The vapor working fluid is isentropically compressed into superheated vapor by the heat pump compressor (12). The superheated vapor enters the condenser (14) to complete the water heating in the water circulation system (3). The superheated vapor that has completed the heat exchange is condensed into a liquid working fluid and enters the throttling valve (13). The condensed working fluid is cooled and depressurized by the throttling valve (13) and then enters the evaporator (11) to complete the circulation of the working fluid.

3. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 1, characterized in that, The direct compression enthalpy-increasing subsystem (2) also includes a filter (22), the inlet of which is connected to the separator (21), and the outlet of which is connected to the steam compressor (23). The filter (22) is used to filter out the liquid water mixed in the steam, and the filtered low-temperature and low-pressure steam enters the steam compressor (23).

4. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 3, characterized in that, The steam storage tank (29) is also connected to a steam replenishment valve (30), which is used to provide steam replenishment to the steam storage tank (29).

5. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 3, characterized in that, The steam compressor (23) also includes a self-lubricating water spray module, which includes a water spray valve (24) and a water spray pump (25). The separator (21), the water spray valve (24), the water spray pump (25) and the steam compressor (23) are connected in sequence to form a circuit. When the self-lubricating water spray module is running, the water spray valve (24) opens, and the water spray pump (25) draws water from the separator (21) into the steam compressor (23) to lubricate the steam compressor (23). The lubricated water is then returned to the separator (21).

6. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 1, characterized in that, The steam compressor (23) also includes an oil supply module, which includes an oil tank (26), an oil supply regulating valve (27), and an oil supply pump (28). The oil tank (26), the oil supply regulating valve (27), the oil supply pump (28), and the steam compressor (23) are connected in sequence to form a circuit. When the oil supply module is running, the oil supply regulating valve (27) opens, and the oil supply pump (28) draws lubricating oil from the oil tank (26) to supply lubricating oil to the oil lubrication components inside the steam compressor (23). The lubricated oil continues to return to the oil tank (26).

7. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 1, characterized in that, The hot water supply system (4) includes a hot water valve (41), a hot water pump (42) and a water storage tank (43) connected in sequence. The hot water valve (41) is connected to the separator (21), and the high-temperature hot water in the separator (21) is drawn into the water storage tank (43) by the hot water pump (42).

8. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to any one of claims 1-7, characterized in that, It also includes a data acquisition module and a control cabinet (51). The data acquisition module is used to collect real-time parameters. The control cabinet (51) is equipped with a protection parameter range. When the real-time parameters exceed the protection parameter range, the control cabinet (51) controls the indirect compression enthalpy increase subsystem (1), the direct compression enthalpy increase subsystem (2), the water circulation system (3), or the hot water supply system (4) to stop working.

9. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 2, characterized in that, The working medium in the evaporator (11) is one of CO2, R134a, R245fa and water.

10. The high-temperature heat pump steam generator based on composite enthalpy enhancement according to claim 8, characterized in that, include: The data acquisition module is used to collect at least one of temperature, pressure, liquid level, and flow rate.

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