High-temperature steam and water source heat pump combined energy supply system

Abstract

The utility model discloses a high-temperature steam and water source heat pump combined energy supply system, which comprises a steam generator, a steam turbine, a generator, a hot water tank, a steam storage tank and a water source heat pump unit, and the steam discharge end of the steam generator is communicated with the steam storage tank and the steam inlet end of the steam turbine; the steam generator is provided with a jacket, the interior of the jacket is communicated with the hot water tank through a circulating pipeline, a circulating water pump and a mixer are assembled on the circulating pipeline, and water in the first water supplementing pipeline and water in the water heating tank enter the jacket after passing through the mixer; the hot water tank is communicated with the water source side of the water source heat pump unit through a heat exchange unit. Water taken by the water source heat pump unit and hot water generated by the steam generator are subjected to heat exchange, so that the water inlet temperature of the water source heat pump unit is stabilized, and the stability of the water source heat pump unit is guaranteed; and the steam generator can be used for generating steam and can also be used for power generation driving, and generated electric energy can provide certain electric power support for an energy supply system.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pump energy supply, and particularly relates to an energy supply system combining high-temperature steam and water source heat pump. Background Technique

[0002] The water source heat pump utilizes the low-grade heat energy resources formed by the solar energy and geothermal energy absorbed in the shallow water sources on the earth's surface, such as groundwater, rivers and lakes. By adopting the heat pump principle and inputting a small amount of high-level electric energy, a technology for transferring low-grade heat energy to high-grade heat energy is realized. Therefore, the water temperature of the water source heat pump directly affects the operation stability of the water source heat pump. In the actual operation of the water source heat pump, due to factors such as seasonal temperature and region, the stability of the water source temperature is not high, and auxiliary heating needs to be combined for heating to make the inlet water temperature of the water source heat pump tend to be stable; based on this, further research can be carried out on the form of the water source heat pump and auxiliary heating to ensure the operation stability of the water source heat pump. Content of the Utility Model

[0003] Aiming at the above technical problems, the purpose of the utility model is to provide an energy supply system combining high-temperature steam and water source heat pump.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] The energy supply system combining high-temperature steam and water source heat pump includes a steam generator, a steam turbine, a generator, a hot water tank, a steam storage tank, and a water source heat pump unit.

[0006] The steam discharge end of the steam generator is connected in parallel with a first discharge pipe and a second discharge pipe. The first discharge pipe is connected to the steam storage tank, and a first valve is installed on the first discharge pipe.

[0007] The second discharge pipe is connected to the steam inlet end of the steam turbine. The power output end of the steam turbine is connected to the generator, and a second valve is installed on the second discharge pipe.

[0008] The steam generator has a jacket, and the inside of the jacket is connected to the hot water tank through a circulation pipe. A circulation water pump and a mixer are assembled on the circulation pipe. A first water replenishing pipe is connected to the circulation pipe, and a fourth valve is installed on the first water replenishing pipe. The water in the first water replenishing pipe and the water in the water heat tank enter the inside of the jacket after passing through the mixer.

[0009] The hot water tank is connected to the water source side of the water source heat pump unit through a heat exchange unit.

[0010] The exhaust end of the steam turbine is connected to a condenser. The discharge end of the condenser is connected to a condensate water tank. The condensate water tank is connected to the inside of the steam generator. A second water replenishing pipe is connected to the condensate water tank, and a third valve is installed on the second water replenishing pipe.

[0011] In a further embodiment, the heat exchange unit includes a first heat exchanger;

[0012] The primary side of the first heat exchanger communicates with the inside of the hot water tank, and the secondary side of the first heat exchanger communicates with the water source side of the water source heat pump unit and the water intake pipeline of the water source heat pump unit.

[0013] The heat exchange unit includes a second heat exchanger;

[0014] The inlet ends of the primary sides of the first heat exchanger and the second heat exchanger are connected in parallel and then communicate with the hot water tank. A fifth valve is installed at the inlet end of the primary side of the first heat exchanger, and a sixth valve is installed at the inlet end of the primary side of the second heat exchanger;

[0015] The outlet ends of the primary sides of the first heat exchanger and the second heat exchanger are connected in parallel and then communicate with the hot water tank. A first connecting pipeline is connected in parallel between the outlet end of the primary side of the first heat exchanger and the inlet end of the primary side of the second heat exchanger, and an eighth valve is installed on the first connecting pipeline; A seventh valve is installed between the connection point of the first connecting pipeline and the outlet end of the primary side of the first heat exchanger and the hot water tank.

[0016] In a further embodiment, the inlet ends of the secondary sides of the first heat exchanger and the second heat exchanger are connected in parallel with the water intake pipeline. An eleventh valve is installed at the inlet end of the secondary side of the first heat exchanger, and a twelfth valve is installed at the inlet end of the secondary side of the second heat exchanger;

[0017] The outlet ends of the secondary sides of the first heat exchanger and the second heat exchanger are connected in parallel with the inlet end of the water source side of the water source heat pump unit; A thirteenth valve is installed at the outlet end of the secondary side of the second heat exchanger;

[0018] A second connecting pipeline is connected between the outlet end of the secondary side of the second heat exchanger and the inlet end of the secondary side of the first heat exchanger, and a fourteenth valve is installed on the second connecting pipeline.

[0019] A third heat exchanger is provided between the condensate water tank and the hot water tank;

[0020] In a further embodiment, the primary side of the third heat exchanger communicates with the inside of the hot water tank, the inlet end of the secondary side of the third heat exchanger communicates with the condensate water tank, and the outlet end of the secondary side of the third heat exchanger communicates with the inside of the steam generator.

[0021] In a further embodiment, temperature sensors are respectively installed at the water intake pipeline, the hot water tank, and the steam storage tank.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] By exchanging heat between the water intake of the water source heat pump unit and the hot water generated by the steam generator, the inlet water temperature of the water source heat pump unit is stabilized to ensure the stability of the water source heat pump unit; moreover, the steam generated by the steam generator can be used or used as a power drive to generate electric energy, which can provide certain power support for the energy supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the system structure in the present utility model;

[0025] Figure 2 It is a schematic diagram of the connection between the hot water tank and the water source heat pump unit in the present utility model;

[0026] Figure 3 It is another schematic diagram of the connection between the hot water tank and the water source heat pump unit in the present utility model;

[0027] Figure 4 It is still another schematic diagram of the connection between the hot water tank and the water source heat pump unit in the present utility model;

[0028] The reference numerals in the drawings represent as follows:

[0029] 10. Steam generator, 11. Steam turbine, 12. Generator, 13. Hot water tank, 14. Steam storage tank, 15. Water source heat pump unit, 16. First discharge pipe, 17. Second discharge pipe, 18. First valve, 19. Second valve;

[0030] 20. Circulation pipe, 21. Circulation water pump, 22. Mixer, 23. First water supply pipe, 24. Fourth valve, 25. Condenser, 26. Condensation pipe, 27. Condensation water tank, 28. Second water supply pipe, 29. Third valve;

[0031] 30. First heat exchanger, 31. Second heat exchanger, 32. Fifth valve, 33. Sixth valve, 34. First communication pipe, 35. Eighth valve, 36. Seventh valve, 37. Eleventh valve, 38. Twelfth valve, 39. Thirteenth valve;

[0032] 40. Second communication pipe, 41. Fourteenth valve, 42. Parallel connection pipe, 43. Ninth valve, 44. Third heat exchanger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-4 As shown, the energy supply system combining high-temperature steam and water source heat pump includes a steam generator 10, a steam turbine 11, a generator 12, a hot water tank 13, a steam storage tank 14, and a water source heat pump unit 15. Among them, the steam generator 10 is a steam boiler using common heating methods such as electric heating / gas combustion heating, which realizes the formation of high-temperature steam from the liquid passing through it for driving the steam turbine 11. The steam turbine 11 receives the steam discharged from the steam generator 10, starts the impeller to rotate and drives the generator 12 to generate electricity. The generated electric energy is stored in the energy storage battery pack, which can supply power to the energy supply system to provide power guarantee. The hot water tank 13 has a storage space inside for storing the incoming hot water and has a heat preservation layer. The water in the hot water tank 13 can pass through the jacket of the steam generator 10 and exchange heat with the liquid medium in the jacket. The high-temperature water in the hot water tank 13 can also be sent to hot water users for use, or can exchange heat with other low-temperature water. The steam storage tank 14 is a pressure storage tank with a certain heat preservation ability, which is used to receive part of the steam discharged from the steam generator 10 for use in places where steam is needed (such as factories that need high-temperature steam to produce products). The water source heat pump unit 15 is used to draw water from the water source, operate the water source heat pump unit 15, and supply energy to users. Among them, during heating, it can exchange heat with the high-temperature water in the hot water tank 13 to improve the stability of the water temperature on the water source side of the water source heat pump unit 15, so as to ensure the smoothness of the energy supply of the water source heat pump unit 15.

[0035] Among them, the steam discharge end of the steam generator 10 is connected in parallel with a first discharge pipe 16 and a second discharge pipe 17. The first discharge pipe 16 is connected to the steam storage tank 14, and a first valve 18 is installed on the first discharge pipe 16; the second discharge pipe 17 is connected to the steam inlet end of the steam turbine 11, and the power output end of the steam turbine 11 is connected to the generator 12. A second valve 19 is installed on the second discharge pipe 17; the direction of the steam generated in the steam generator 10 can be realized by switching the first valve 18 and the second valve 19. For example, it can be stored in the steam storage tank 14 through the first discharge pipe 16, or transported towards the steam turbine 11 through the second discharge pipe 17. The specific switching method is set according to needs. For example, the first valve 18 and the second valve 19 can be switched regularly, or when the pressure value in the steam storage tank 14 is lower than the set value, the first valve 18 is opened to transport steam into the steam storage tank 14, and so on.

[0036] Among them, the steam generator 10 has a jacket. The jacket is sleeved outside the steam generator 10, and an annular space is formed between the inner wall of the jacket and the outer wall of the steam generator 10. A spiral heat exchange tube can be assembled in this space. The spiral heat exchange tube in the jacket is connected to the hot water tank 13 through a circulation pipe 20, so as to transfer the heat in the jacket to the low-temperature water from the hot water tank 13; a circulation water pump 21 and a mixer 22 are assembled on the circulation pipe 20. A first makeup water pipe 23 is connected to the circulation pipe 20, and a fourth valve 24 is installed on the first makeup water pipe 23. The water in the first makeup water pipe 23 and the water in the hot water tank enter the jacket after passing through the mixer 22; a liquid level sensor is arranged in the hot water tank 13. When the liquid level is lower than the set level, the fourth valve 24 is opened, and water is replenished into the circulation pipe through the first makeup water pipe 23. The low-temperature water at the back and the high-temperature water from the hot water tank 13 are mixed by the mixer 22 and then enter the spiral heat exchange tube together to be heated in the jacket. The temperature of the replenished low-temperature water is appropriately increased by the mixer 22, so that the temperature of the water entering the jacket for heat exchange is increased to a certain extent, so as to reduce the influence of the inlet water on the self-function of the steam generator 10.

[0037] Among them, the hot water tank 13 is connected to the water source side of the water source heat pump unit 15 through a heat exchange unit. The high-temperature water in the hot water tank 13 and the low-temperature water entering the water source side of the heat pump unit are heat-exchanged through the heat exchange unit, so that the water temperature entering the water source side of the heat pump unit is more stable, thereby ensuring the stability of the operation and energy supply of the heat pump unit.

[0038] Among them, the exhaust end of the steam turbine 11 is connected to a condenser 25. The condensation pipeline 26 of the condenser 25 is for low-temperature water to enter and high-temperature water to discharge, so as to supply the high-temperature water use end for use. In order to obtain the stability of the high-temperature water supply at the condenser 25, a water collection tank can also be used to centrally collect and supply the high-temperature water. The discharge end of the condenser 25 is connected to a condensate tank 27. The condensate tank 27 is in communication with the interior of the steam generator 10. A second makeup water pipeline 28 is connected to the condensate tank 27, and a third valve 29 is installed on the second makeup water pipeline 28. Open the third valve 29 to replenish water into the condensate tank 27 through the second makeup water pipeline 28 to make up for the loss of liquid during the steam generation process.

[0039] In some embodiments, such as Figure 2 shown, the heat exchange unit includes a first heat exchanger 30. The primary side of the first heat exchanger 30 is in communication with the interior of the hot water tank 13, and the secondary side of the first heat exchanger 30 is in communication with the water source side of the water source heat pump unit 15 and the water intake pipeline of the water source heat pump unit 15. When the temperature of the water taken from the water intake pipeline meets the inlet water temperature of the water source side of the water source heat pump unit 15, the water in the water intake pipeline can directly enter the water source side of the water source heat pump for operation. If the water intake temperature in the water intake pipeline is lower than the required inlet water temperature, the water intake can be switched through a valve and passed into the first heat exchanger 30 for heat exchange to be raised to the required inlet water temperature of the water source side of the water source heat pump unit 15, so as to ensure the stability of the water source heat pump inlet water temperature. Using the first heat exchanger 30 is more suitable for the energy supply use scenarios where the number of water source heat pump units 15 is small, the energy supply demand is small, and the water intake temperature fluctuates relatively little.

[0040] In some embodiments, such as Figure 2 shown, the heat exchange unit includes a second heat exchanger 31. The inlet ends of the primary sides of the first heat exchanger 30 and the second heat exchanger 31 are connected in parallel and then connected to the hot water tank 13. A fifth valve 32 is installed at the inlet end of the primary side of the first heat exchanger 30, and a sixth valve 33 is installed at the inlet end of the primary side of the second heat exchanger 31. The outlet ends of the primary sides of the first heat exchanger 30 and the second heat exchanger 31 are connected in parallel and then connected to the hot water tank 13. A first communication pipeline 34 is connected in parallel between the outlet end of the primary side of the first heat exchanger 30 and the inlet end of the primary side of the second heat exchanger 31, and an eighth valve 35 is installed on the first communication pipeline. A seventh valve 36 is installed between the connection point of the first communication pipeline and the outlet end of the primary side of the first heat exchanger 30 and the hot water tank 13. By switching the fifth, sixth, seventh, and eighth valves, the parallel or series connection between the primary sides of the first heat exchanger 30 and the second heat exchanger 31 can be realized, so as to realize multiple modes of the high-temperature water in the hot water tank 13 flowing through the heat exchanger.

[0041] Similarly, the secondary side inlet ends of the first heat exchanger 30 and the second heat exchanger 31 are connected in parallel with the water intake pipe. An eleventh valve 37 is installed at the secondary side inlet end of the first heat exchanger 30, and a twelfth valve 38 is installed at the secondary side inlet end of the second heat exchanger 31. The secondary side outlet ends of the first heat exchanger 30 and the second heat exchanger 31 are connected in parallel with the water source side inlet end of the water source heat pump unit 15. A thirteenth valve 39 is installed at the secondary side outlet end of the second heat exchanger 31. A second connecting pipe 40 is connected between the secondary side outlet end of the second heat exchanger 31 and the secondary side inlet end of the first heat exchanger 30, and a fourteenth valve 41 is installed on the second connecting pipe. By switching the eleventh, twelfth, thirteenth, and fourteenth valves, the parallel or series connection between the secondary sides of the first heat exchanger 30 and the second heat exchanger 31 can be achieved, and the water intake path in the water intake pipe can be realized. When the water intake temperature is relatively low and the heat exchange time needs to be extended, the two heat exchangers can be connected in series. When the water intake temperature is low, the water can pass through any one of the heat exchangers for heat exchange. Using the first heat exchanger 30, the second heat exchanger 31, or more heat exchangers is more suitable for the energy supply use scenarios where the number of water source heat pump units 15 is large, the energy supply demand is large, and the water intake temperature fluctuates relatively greatly.

[0042] In some embodiments, such as Figure 4 , there is a parallel connecting pipe 42 between the water intake pipe and the water source side of the water source heat pump unit 15. A ninth valve 43 is installed on the parallel connecting pipe 42. By switching the ninth valve 43, the eleventh valve 37, and the twelfth valve 38, the water in the water intake pipe can directly enter the water source heat pump unit 15, or enter the water source heat pump unit 15 after passing through the first heat exchanger 30 / second heat exchanger 31, or enter the water source heat pump unit 15 after passing through the first heat exchanger 30 and the second heat exchanger 31 simultaneously, so as to increase the requirements for the water source heat pump unit 15 to adapt to more energy supply scenarios.

[0043] In some embodiments, a third heat exchanger 44 is provided between the condensate water tank and the hot water tank 13. The primary side of the third heat exchanger 44 is in communication with the inside of the hot water tank 13, the secondary side inlet end of the third heat exchanger 44 is in communication with the condensate water tank, and the secondary side outlet end of the third heat exchanger 44 is in communication with the inside of the steam generator 10. Through the third heat exchanger 44, the water entering the steam generator 10 can be preheated by heat exchange to increase the water temperature entering the steam generator 10, so as to ensure the stability of steam generation in the steam generator 10.

[0044] In some embodiments, temperature sensors are respectively installed at the water intake pipe, the hot water tank 13, and the steam storage tank 14 to monitor the temperatures at various locations.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An energy supply system combining high-temperature steam and a water source heat pump, comprising a steam generator, a steam turbine, a generator, a hot water tank, a steam storage tank, and a water source heat pump unit, characterized in that The steam discharge end of the steam generator is connected in parallel with a first discharge pipe and a second discharge pipe. The first discharge pipe is connected to the steam storage tank, and a first valve is installed on the first discharge pipe; The second discharge pipe is connected to the steam inlet end of the steam turbine. The power output end of the steam turbine is connected to the generator, and a second valve is installed on the second discharge pipe; The steam generator has a jacket, and the inside of the jacket is connected to the hot water tank through a circulation pipe. A circulation water pump and a mixer are assembled on the circulation pipe. A first water supply pipe is connected to the circulation pipe, and a fourth valve is installed on the first water supply pipe. The water in the first water supply pipe and the water in the water heat tank enter the inside of the jacket after passing through the mixer; A connection is formed between the hot water tank and the water source side of the water source heat pump unit through a heat exchange unit; The exhaust end of the steam turbine is connected to a condenser, the discharge end of the condenser is connected to a condensate water tank, the condensate water tank is connected to the inside of the steam generator, a second water supply pipe is connected to the condensate water tank, and a third valve is installed on the second water supply pipe.

2. The energy supply system combining high-temperature steam and water source heat pump according to claim 1, characterized in that The heat exchange unit includes a first heat exchanger; The primary side of the first heat exchanger is connected to the inside of the hot water tank, and the secondary side of the first heat exchanger is connected to the water source side of the water source heat pump unit and the water intake pipe of the water source heat pump unit.

3. The energy supply system combining high-temperature steam and a water source heat pump according to claim 1, wherein The heat exchange unit includes a second heat exchanger; The inlet ends of the primary sides of the first heat exchanger and the second heat exchanger are connected in parallel and then connected to the hot water tank. A fifth valve is installed at the inlet end of the primary side of the first heat exchanger, and a sixth valve is installed at the inlet end of the primary side of the second heat exchanger; The outlet ends of the primary sides of the first heat exchanger and the second heat exchanger are connected in parallel and then connected to the hot water tank. A first connecting pipe is connected in parallel between the outlet end of the primary side of the first heat exchanger and the inlet end of the primary side of the second heat exchanger, and an eighth valve is installed on the first connecting pipe; A seventh valve is installed between the connection of the first connecting pipe and the outlet end of the primary side of the first heat exchanger and the hot water tank.

4. The energy supply system combining high-temperature steam and water source heat pump according to claim 3, characterized in that, The inlet ends of the secondary sides of the first heat exchanger and the second heat exchanger are connected in parallel with the water intake pipe. An eleventh valve is installed at the inlet end of the secondary side of the first heat exchanger, and a twelfth valve is installed at the inlet end of the secondary side of the second heat exchanger; The outlet ends of the secondary sides of the first heat exchanger and the second heat exchanger are connected in parallel with the inlet end of the water source side of the water source heat pump unit; A thirteenth valve is installed at the outlet end of the secondary side of the second heat exchanger; A second connecting pipe is connected between the outlet end of the secondary side of the second heat exchanger and the inlet end of the secondary side of the first heat exchanger, and a fourteenth valve is installed on the second connecting pipe.

5. The energy supply system combining high-temperature steam and water source heat pump according to claim 1, characterized in that, A third heat exchanger is provided between the condensate water tank and the hot water tank; The primary side of the third heat exchanger is connected to the inside of the hot water tank, the inlet end of the secondary side of the third heat exchanger is connected to the condensate water tank, and the outlet end of the secondary side of the third heat exchanger is connected to the inside of the steam generator.

6. The energy supply system combining high-temperature steam and water source heat pump according to claim 1, characterized in that, Temperature sensors are installed at the water intake pipe, the hot water tank, and the steam storage tank respectively.

Images