Waste heat recovery water source heat pump steam unit

Abstract

The utility model relates to the field of water source heat pump steam engines, in particular to a waste heat recovery water source heat pump steam engine unit, which comprises a heat pump cycle, a preheating water cycle and a steam generation water cycle, the heat pump cycle comprises a heat pump compressor, a steam generator, a liquid storage device, a first throttling device, a second throttling device, an evaporator and a first gas-liquid separator, the preheating water circulation comprises a make-up pump, a preheater, a second gas-liquid separator and a first electromagnetic valve, the steam generation water circulation comprises the second gas-liquid separator and a circulating water pump, and through the arrangement, water does not need to be heated through electric direct heating when the unit is started in the preheating water circulation and the steam generation water circulation; water vapor can be generated by absorbing heat from heat pump circulation and waste heat water circulation, and energy consumption of a steam unit is reduced.

Description

Technical Field

[0001] The utility model relates to the field of water source heat pump steam engines, and particularly relates to a waste heat recovery water source heat pump steam unit. Background Art

[0002] 50% - 70% of industrial energy consumption in China is consumed in the form of heat energy, and most of it is high-temperature heat energy demand above 80°C. Traditional high-temperature heating uses coal-fired, oil-fired, gas-fired boilers or electric boilers, etc., which have problems such as low efficiency and high pollution. Moreover, more than half of the heat energy is converted into waste heat in the form of waste gas and waste water after use, and a large amount of waste heat is directly discharged, resulting in waste.

[0003] As an efficient and clean heating method, water source heat pump can recover and reuse waste heat in the process, thus greatly saving energy consumption and related carbon dioxide emissions. The common technical solution for water source heat pump to produce steam is to use a high-temperature water source heat pump to produce high-temperature hot water at 85°C - 140°C, and then use the negative pressure / micro-pressure flash evaporation of a flash tank to produce steam. In the existing technology of obtaining water vapor by using the heat of recycled waste hot water, electric heating is often carried out before the start of the steam unit, and then the heat provided by the heat pump cycle is absorbed to directly produce water vapor. This method increases the energy consumption of the entire steam unit. Content of the Utility Model

[0004] The purpose of the utility model is to use waste hot water to heat the makeup water before the start of the unit. At the same time, after the unit operates stably, the waste hot water releases heat through two temperature drops in the preheater and the evaporator, improving the utilization efficiency of waste hot water and the overall steam production energy efficiency of the unit.

[0005] The utility model provides a waste heat recovery water source heat pump steam unit, which includes a heat pump cycle, a pre-heating water cycle, and a steam generation water cycle;

[0006] The heat pump cycle includes a heat pump compressor, a steam generator, a liquid storage tank, a first throttling device, an evaporator, a first gas-liquid separator, and a second throttling device. The heat pump compressor, the steam generator, and the liquid storage tank are connected in sequence. The outlet of the liquid storage tank is respectively connected to the inlet of the first throttling device and the inlet of the second throttling device. The outlet of the second throttling device is connected to the air supplement port of the heat pump compressor. The first throttling device, the evaporator, and the first gas-liquid separator are connected in sequence. The outlet of the first gas-liquid separator is connected to the suction port of the heat pump compressor. The steam generator is used for heat exchange with the steam generation water cycle;

[0007] The preheated water circulation includes a make-up water pump, a preheater, a second gas-liquid separator, and a first solenoid valve that are connected in sequence to form a circulation loop. The preheated water circulation exchanges heat with the steam generator through a channel connecting the preheater and the second gas-liquid separator. The inlet of the make-up water pump is also connected to a second solenoid valve;

[0008] The steam generation water circulation includes the second gas-liquid separator and a circulation water pump that are connected in sequence to form a circulation loop. The steam generation water circulation exchanges heat with the steam generator through a channel connecting the second gas-liquid separator and the circulation water pump. The preheated water circulation is connected to the steam generation water circulation through the second gas-liquid separator;

[0009] By providing a make-up water pump and a second solenoid valve in the preheated water circulation, the water in the preheated water circulation can be supplemented according to requirements, ensuring sufficient water volume in the second gas-liquid separator and enabling the steam unit to continuously output steam. By providing the second gas-liquid separator, the water in the preheated water circulation can be shunted. The water vapor can be output from the steam valve, and the unevaporated water is stored in the second gas-liquid separator for further heating, improving the working efficiency of the steam unit and preventing liquid from being carried in the output steam. By providing the first solenoid valve, the make-up water circulation in the preheated water circulation can be heated before starting the unit, ensuring that the steam unit can be started normally.

[0010] By connecting the steam generation water circulation and the preheated water circulation through the second gas-liquid separator, the water in the second gas-liquid separator enters the steam generator through the circulation water pump for secondary heat exchange, improving the heat exchange efficiency and thus the efficiency of water vapor generation. The second gas-liquid separator is provided with a steam valve for outputting water vapor.

[0011] The waste heat recovery water source heat pump steam unit includes a surplus hot water circulation;

[0012] The surplus hot water circulation includes a third solenoid valve, the preheater, and the evaporator that are connected in sequence to form a circulation loop. The surplus hot water circulation further includes a fourth solenoid valve, and the fourth solenoid valve and the evaporator are connected in sequence to form a circulation loop. The surplus hot water circulation exchanges heat with the preheated water circulation through the preheater and exchanges heat with the heat pump circulation through the evaporator.

[0013] By setting a third solenoid valve in the surplus hot water circulation, the flow rate of the surplus hot water circulation can be adjusted according to actual needs, making more effective use of the waste heat and improving the heat utilization efficiency of the steam unit. By setting the surplus hot water circulation to exchange heat with the preheated water circulation through a preheater, and the surplus hot water circulation to exchange heat with the heat pump circulation through an evaporator, the heat of the surplus hot water circulation can be transferred to the preheated water circulation and the heat pump circulation respectively, and the preheated water circulation is also connected to the steam generation water circulation, thereby improving the transfer efficiency of the heat of the surplus hot water circulation within the entire steam unit.

[0014] The heat pump circulation includes an economizer. The economizer includes a first inlet, a second inlet, a first outlet, and a second outlet. The outlet of the accumulator is connected to the first inlet of the economizer. The first outlet of the economizer is respectively connected to the inlets of a first throttling device and a second throttling device. The second inlet of the economizer is connected to the outlet of the second throttling device. The second outlet of the economizer is connected to the gas replenishing port of the heat pump compressor.

[0015] The economizer is a plate heat exchanger.

[0016] Through the above settings, water enters the preheated water circulation through the second solenoid valve, sequentially passes through the preheater and the steam generator to absorb the heat from the surplus hot water circulation and the heat pump circulation, enters the second gas-liquid separator, and the water preheated twice then enters the steam generation water circulation through a circulation pump, exchanges heat with the steam generator again, absorbs the heat from the heat pump circulation, and then enters the second gas-liquid separator to achieve gas-liquid separation. The unevaporated water falls to the bottom of the second gas-liquid separator and mixes with the makeup water, continues to flow and circulate in the steam generation water circulation for heating, and the generated water vapor is then transported to users through a steam valve. Through this setting, the water does not require additional energy consumption for heating within the water circulation, and can generate water vapor by absorbing the heat from the heat pump circulation and the surplus hot water circulation, reducing the energy consumption of the steam unit.

[0017] The preheater is a plate heat exchanger or a double-pipe heat exchanger.

[0018] The heat pump compressor is a scroll compressor, a screw compressor, a centrifugal compressor, etc.

[0019] The working fluid within the heat pump circulation is R1233zd(E), and the working fluid can also be set as R245fa.

[0020] A liquid level monitoring device is also provided within the second gas-liquid separator. The liquid level monitoring device is used to monitor the water level of the second gas-liquid separator. A temperature detection device is also provided within the second gas-liquid separator. The temperature detection device is used to detect the temperature within the second gas-liquid separator.

[0021] The liquid level monitoring device is a float-type liquid level monitor, or the liquid level monitoring device can be set as an ultrasonic liquid level sensor.

[0022] The temperature detection device can be set as an electronic thermometer or the like.

[0023] The valve types adopted by the first throttling device and the second throttling device can both be electronic expansion valves or capillaries.

[0024] Furthermore, the steam generator is provided with a working medium inlet, a working medium outlet, a circulating water outlet, a circulating water inlet, a makeup water outlet, and a makeup water inlet.

[0025] The working medium inlet is used to communicate with the heat pump compressor, the working medium outlet is used to communicate with the liquid receiver, both the circulating water outlet and the makeup water outlet are used to communicate with the second gas-liquid separator, the circulating water inlet is used to communicate with the circulating water pump, and the makeup water inlet is used to communicate with the preheater.

[0026] The makeup water inlet and the makeup water outlet are communicated through at least one detour pipeline, and the circulating water inlet and the circulating water outlet are communicated through at least one detour pipeline.

[0027] During use, at the initial stage, the first solenoid valve is in a closed state, and the makeup water pump is started to supply water to the second gas-liquid separator through the second solenoid valve. When the liquid level monitor detects that the water level in the second gas-liquid separator reaches the highest set value, the first solenoid valve is opened and the second solenoid valve is closed. The circulating water flows through the preheater and is heated by the surplus hot water circulation. When the water temperature in the second gas-liquid separator reaches the set value, the first solenoid valve is closed, and the circulating water pump and the heat pump compressor are started in sequence. The opening degree of the steam valve is adjusted. After the system outputs stable steam, the makeup water pump and the second solenoid valve are opened again.

[0028] Compared with the prior art, the beneficial effects of the present utility model are:

[0029] 1. The present utility model provides a waste heat recovery water source heat pump steam unit, which is provided with a heat pump cycle, a preheating water cycle, a steam generation water cycle and a surplus hot water cycle; the heat pump cycle includes a heat pump compressor, a steam generator, a liquid receiver and an economizer connected in sequence, the economizer includes a first inlet, a second inlet, a first outlet and a second outlet, the outlet of the liquid receiver is connected to the first inlet of the economizer, the first outlet of the economizer is respectively connected to the inlets of a first throttling device and a second throttling device, the second inlet of the economizer is connected to the outlet of the second throttling device, the second outlet of the economizer is connected to the gas supplement port of the heat pump compressor, the second throttling device can be connected to an evaporator and a first gas-liquid separator in sequence, the outlet of the first gas-liquid separator is connected to the suction port of the heat pump compressor, the steam generator is used for heat exchange with the steam generation water cycle, the evaporator is also connected to the surplus hot water cycle, and the evaporator is used for heat exchange with the surplus hot water cycle; the preheating water cycle includes a make-up water pump, a preheater, a second gas-liquid separator and a first solenoid valve connected in sequence to form a circulation loop, the preheating water cycle exchanges heat with the steam generator through a channel connecting the preheater and the second gas-liquid separator, the inlet of the make-up water pump is also connected to a second solenoid valve, the preheater is used for heat exchange with the surplus hot water cycle, the second gas-liquid separator is provided with a steam valve, and the steam valve is used for outputting water vapor; the steam generation water cycle includes the second gas-liquid separator and a circulation pump connected in sequence to form a circulation loop, the steam generation water cycle exchanges heat with the steam generator through a channel connecting the second gas-liquid separator and the circulation pump, and the preheating water cycle is connected to the steam generation water cycle through the second gas-liquid separator; the surplus hot water cycle includes a third solenoid valve, the preheater and the evaporator connected in sequence to form a circulation loop, the surplus hot water cycle further includes a fourth solenoid valve, the fourth solenoid valve and the evaporator are connected in sequence to form a circulation loop, the surplus hot water cycle exchanges heat with the preheating water cycle through the preheater, and the surplus hot water cycle exchanges heat with the heat pump cycle through the evaporator, which can realize that water in the preheating water cycle and the steam generation water cycle does not need to be directly heated by electricity when the unit starts, and can generate water vapor by absorbing heat from the heat pump cycle and the surplus hot water cycle, reducing the energy consumption of the steam unit. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of a heat pump steam unit that directly generates water vapor by using waste heat in Embodiment 1 provided by the present utility model.

[0031] Figure 2 It is a schematic structural diagram of the steam generator in Embodiment 2 provided by the present utility model.

[0032] Reference numerals in the figure:

[0033] 1 - Heat pump compressor, 2 - Steam generator, 3 - Liquid storage tank, 4 - Economizer, 5 - First throttling device, 6 - Evaporator, 7 - First gas-liquid separator, 8 - Second throttling device, 9 - Second gas-liquid separator, 10 - Preheater, 11 - Circulating water pump, 12 - Make-up water pump, 13 - Steam valve, 14 - First solenoid valve, 15 - Second solenoid valve, 16 - Third solenoid valve, 17 - Fourth solenoid valve, 18 - Liquid level monitoring device, 21 - Working medium inlet, 22 - Working medium outlet, 23 - Circulating water outlet, 24 - Circulating water inlet, 25 - Make-up water outlet, 26 - Make-up water inlet. Specific embodiments

[0034] The present invention will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0035] Embodiment 1

[0036] As Figure 1 shown, a waste heat recovery water source heat pump steam unit includes a heat pump cycle, a preheated water cycle, and a steam generation water cycle;

[0037] The heat pump cycle includes a heat pump compressor 1, a steam generator 2, a liquid storage tank 3, a first throttling device 5, an evaporator 6, a first gas-liquid separator 7, and a second throttling device 8. The heat pump compressor 1, the steam generator 2, and the liquid storage tank 3 are connected in sequence. The outlet of the liquid storage tank 3 is respectively connected to the inlet of the first throttling device 5 and the inlet of the second throttling device 8. The outlet of the second throttling device 8 is connected to the gas supplement port of the heat pump compressor 1. The first throttling device 5, the evaporator 6, and the first gas-liquid separator 7 are connected in sequence. The outlet of the first gas-liquid separator 7 is connected to the suction port of the heat pump compressor 1. The steam generator 2 is used for heat exchange with the steam generation water cycle;

[0038] The preheated water cycle includes a make-up water pump 12, a preheater 10, a second gas-liquid separator 9, and a first solenoid valve 14 that are connected in sequence to form a circulation loop. The preheated water cycle exchanges heat with the steam generator 2 through a channel connecting the preheater 10 and the second gas-liquid separator 9. The inlet of the make-up water pump 12 is also connected to a second solenoid valve 15;

[0039] The steam generation water cycle includes the second gas-liquid separator 9 and the circulation water pump 11 that are connected in sequence to form a circulation loop. The steam generation water cycle exchanges heat with the steam generator 2 through a channel connecting the second gas-liquid separator 9 and the circulation water pump 11. The preheated water cycle is connected to the steam generation water cycle through the second gas-liquid separator 9;

[0040] By providing a makeup water pump 12 and a second solenoid valve 15 in the preheated water cycle, the water in the preheated water cycle can be supplemented according to requirements, ensuring sufficient water volume in the second gas-liquid separator 9 and enabling the steam unit to continuously output steam;; By providing the second gas-liquid separator 9, the water in the preheated water cycle can be diverted. Water vapor can be output from the steam valve 13, and the unevaporated water is stored in the second gas-liquid separator 9 waiting for further heating, improving the working efficiency of the steam unit and preventing liquid from being carried in the output steam; By providing the first solenoid valve 14, the makeup water cycle in the preheated water cycle can be heated before starting the unit, ensuring that the steam unit can be started normally.

[0041] By connecting the steam generation water cycle and the preheated water cycle through the second gas-liquid separator 9, the water in the second gas-liquid separator 9 enters the steam generator 2 through the circulation water pump 11 for secondary heat exchange, improving the heat exchange efficiency and thus the efficiency of water vapor generation. The second gas-liquid separator 9 is provided with a steam valve 13, and the steam valve 13 is used to output water vapor.

[0042] The waste heat recovery water source heat pump steam unit includes a surplus hot water cycle;

[0043] The surplus hot water cycle includes a third solenoid valve 16, the preheater 10, and the evaporator 6 that are connected in sequence to form a circulation loop. The surplus hot water cycle further includes a fourth solenoid valve 17, and the fourth solenoid valve 17 and the evaporator 6 are connected in sequence to form a circulation loop. The surplus hot water cycle exchanges heat with the preheated water cycle through the preheater 10, and the surplus hot water cycle exchanges heat with the heat pump cycle through the evaporator 6.

[0044] By providing the third solenoid valve 16 in the surplus hot water cycle, the flow rate of the surplus hot water cycle can be adjusted according to actual requirements, making more effective use of waste heat and improving the heat utilization efficiency of the steam unit; By providing that the surplus hot water cycle exchanges heat with the preheated water cycle through the preheater 10 and the surplus hot water cycle exchanges heat with the heat pump cycle through the evaporator 6, the heat of the surplus hot water cycle can be transferred to the preheated water cycle and the heat pump cycle respectively. And the preheated water cycle is connected to the steam generation water cycle, thereby improving the transfer efficiency of the heat of the surplus hot water cycle within the entire steam unit.

[0045] The heat pump cycle includes an economizer 4, and the economizer 4 includes a first inlet, a second inlet, a first outlet, and a second outlet. The outlet of the liquid storage device 3 is communicated with the first inlet of the economizer 4. The first outlet of the economizer 4 is respectively communicated with the inlet of the first throttling device 5 and the inlet of the second throttling device 8. The second inlet of the economizer 4 is communicated with the outlet of the second throttling device 8. The second outlet of the economizer 4 is communicated with the gas supplement port of the heat pump compressor 1.

[0046] With the above settings, water enters the preheating water cycle through the second solenoid valve 15, sequentially passes through the preheater 10 and the steam generator 2 to absorb the heat from the surplus heat water cycle and the heat pump cycle, enters the second gas-liquid separator 9. The water after being preheated twice then enters the steam generation water cycle through the circulation pump 11, exchanges heat with the steam generator 2 again, absorbs the heat from the heat pump cycle, and then enters the second gas-liquid separator 9 to achieve gas-liquid separation. The unevaporated water drops to the bottom of the second gas-liquid separator 9 and mixes with the makeup water, and continues to flow and circulate in the steam generation water cycle for heating. The generated water vapor is then transported to the user through the steam valve 13. Through this setting, the water does not need to consume additional energy for heating in the water cycle. By absorbing the heat from the heat pump cycle and the surplus heat water cycle, water vapor can be generated, reducing the energy consumption of the steam unit.

[0047] The preheater 10 is a plate heat exchanger, the heat pump compressor 1 is a scroll compressor, the working medium in the heat pump cycle is R1233zd(E), and the economizer 4 is a plate heat exchanger.

[0048] A liquid level monitoring device 18 is further provided in the second gas-liquid separator 9. The liquid level monitoring device 18 is used to monitor the water level of the second gas-liquid separator 9. A temperature detection device is also provided in the second gas-liquid separator 9. The temperature detection device is used to detect the temperature in the second gas-liquid separator 9.

[0049] The liquid level monitoring device 18 is a float type liquid level monitor, and the temperature detection device is set as an electronic temperature detector, etc.

[0050] The first throttling device 5 is an electronic expansion valve, and the second throttling device 8 is an electronic expansion valve.

[0051] The steam generator 2 is provided with a working medium inlet, a working medium outlet, a circulating water outlet, a circulating water inlet, a makeup water outlet, and a makeup water inlet.

[0052] The working medium inlet is used to communicate with the heat pump compressor 1. The working medium outlet is used to communicate with the liquid storage device 3. Both the circulating water outlet and the makeup water outlet are used to communicate with the second gas-liquid separator 9. The circulating water inlet is used to communicate with the circulation pump 11. The makeup water inlet is used to communicate with the preheater 10.

[0053] The water replenishing inlet and the water replenishing outlet are communicated through a tortuous pipeline, and the circulating water inlet and the circulating water outlet are communicated through a tortuous pipeline.

[0054] During use, in the initial stage, the first solenoid valve 14 is in the closed state. The water replenishing pump 12 is started to replenish water to the second gas-liquid separator 9 through the second solenoid valve 15. When the liquid level monitor detects that the water level in the second gas-liquid separator 9 reaches the highest set value, the first solenoid valve 14 is opened and the second solenoid valve 15 is closed. The circulating water flows through the preheater 10 and is heated by the waste heat water circulation. When the water temperature in the second gas-liquid separator 9 reaches the set value, the first solenoid valve 14 is closed. Then, the circulating water pump 11 and the heat pump compressor 1 are started in sequence, the opening degree of the steam valve 13 is adjusted. After the system outputs stable steam, the water replenishing pump 12 and the second solenoid valve 15 are opened again.

[0055] Embodiment 2

[0056] As Figure 2 shown, the difference between this embodiment and Embodiment 1 is that the steam generator 2 is provided with a working medium inlet 21, a working medium outlet 22, a circulating water outlet 23, a circulating water inlet 24, a water replenishing outlet 25, and a water replenishing inlet 26.

[0057] The working medium inlet 21 is used to communicate with the heat pump compressor 1, the working medium outlet 22 is used to communicate with the liquid storage device 3, both the circulating water outlet 23 and the water replenishing outlet 25 are used to communicate with the second gas-liquid separator 9, the circulating water inlet 24 is used to communicate with the circulating water pump 11, and the water replenishing inlet 26 is used to communicate with the preheater 10.

[0058] The water replenishing inlet 26 and the water replenishing outlet 25 are communicated through 1 tortuous pipeline, and the circulating water inlet 24 and the circulating water outlet 23 are communicated through 2 tortuous pipelines.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste heat recovery water source heat pump steam unit, characterized in that, It includes a heat pump cycle, a preheating water cycle, and a steam generation water cycle; The heat pump cycle includes a heat pump compressor (1), a steam generator (2), a liquid reservoir (3), a first throttling device (5), an evaporator (6), a first gas-liquid separator (7), and a second throttling device (8). The heat pump compressor (1), the steam generator (2), and the liquid reservoir (3) are connected in sequence. The outlet of the liquid reservoir (3) is respectively connected to the inlet of the first throttling device (5) and the inlet of the second throttling device (8). The outlet of the second throttling device (8) is connected to the gas supplement port of the heat pump compressor (1). The first throttling device (5), the evaporator (6), and the first gas-liquid separator (7) are connected in sequence. The outlet of the first gas-liquid separator (7) is connected to the suction port of the heat pump compressor (1). The steam generator (2) is used for heat exchange with the steam generation water cycle; The preheating water cycle includes a make-up water pump (12), a preheater (10), a second gas-liquid separator (9), and a first solenoid valve (14) that are connected in sequence to form a circulation loop. The preheating water cycle exchanges heat with the steam generator (2) through a channel connecting the preheater (10) and the second gas-liquid separator (9). The inlet of the make-up water pump (12) is also connected to a second solenoid valve (15). The second gas-liquid separator (9) is provided with a steam valve (13), and the steam valve (13) is used to output water vapor; The steam generation water cycle includes the second gas-liquid separator (9) and a circulation pump (11) that are connected in sequence to form a circulation loop. The steam generation water cycle exchanges heat with the steam generator (2) through a channel connecting the second gas-liquid separator (9) and the circulation pump (11). The preheating water cycle is connected to the steam generation water cycle through the second gas-liquid separator (9).

2. The waste heat recovery water source heat pump steam unit according to claim 1, wherein It includes a surplus heat water cycle; The surplus heat water cycle includes a third solenoid valve (16), the preheater (10), and the evaporator (6) that are connected in sequence to form a circulation loop. The surplus heat water cycle also includes a fourth solenoid valve (17). The fourth solenoid valve (17) and the evaporator (6) are connected in sequence to form a circulation loop. The surplus heat water cycle exchanges heat with the preheating water cycle through the preheater (10). The surplus heat water cycle exchanges heat with the heat pump cycle through the evaporator (6).

3. The waste heat recovery water source heat pump steam unit according to claim 1, characterized in that, The heat pump cycle includes an economizer (4). The economizer (4) includes a first inlet, a second inlet, a first outlet, and a second outlet. The outlet of the liquid reservoir (3) is connected to the first inlet of the economizer (4). The first outlet of the economizer (4) is respectively connected to the inlet of the first throttling device (5) and the inlet of the second throttling device (8). The second inlet of the economizer (4) is connected to the outlet of the second throttling device (8). The second outlet of the economizer (4) is connected to the gas supplement port of the heat pump compressor (1).

4. A waste heat recovery water source heat pump steam unit according to any one of claims 1 to 3, characterized in that, The preheater (10) is a plate heat exchanger or a double-pipe heat exchanger.

5. A waste heat recovery water source heat pump steam unit according to claim 4, characterized in that, The heat pump compressor (1) is a scroll compressor, a screw compressor or a centrifugal compressor.

6. The waste heat recovery water source heat pump steam unit according to claim 4, characterized in that, The working medium in the heat pump cycle is R245fa or R1233zd(E).

7. A waste heat recovery water source heat pump steam unit according to claim 4, characterized in that, A liquid level monitoring device (18) is further provided in the second gas-liquid separator (9). The liquid level monitoring device (18) is used to monitor the water level of the second gas-liquid separator (9). The liquid level monitoring device (18) is a float type liquid level monitor or an ultrasonic liquid level sensor. A temperature detection device is further provided in the second gas-liquid separator (9). The temperature detection device is used to detect the temperature in the second gas-liquid separator (9).

8. The waste heat recovery water source heat pump steam unit according to claim 3, characterized in that The economizer (4) adopts a plate heat exchanger.

9. A waste heat recovery water source heat pump steam unit according to claim 4, characterized in that, The valve types adopted by the first throttling device (5) and the second throttling device (8) are both electronic expansion valves or capillaries.

Images