Heat recovery system of magnetic suspension centrifugal heat pump

Abstract

The utility model discloses a magnetic suspension centrifugal heat pump heat recovery system which comprises an extraction pipeline, a sugar melting pipeline, a water outlet pipeline and a heat recovery pipeline, and the extraction pipeline is sequentially connected with an extraction heating heat exchanger, an extraction device, an extraction cooling heat exchanger, a separator and an extraction blending barrel through a hot water tank; the water outlet pipeline flows through the high-temperature heat release side of the high-temperature magnetic suspension centrifugal heat pump unit and then is divided into two paths, one path is connected to the front end of the extraction device, and the other path is connected to the front end of the sugar melting device of the sugar melting pipeline. The high-temperature magnetic suspension centrifugal heat pump unit is used for recycling waste heat of hot water, the waste heat and heat energy generated by acting are transmitted to the front end of the extraction device and / or the sugar melting device, and meanwhile water in the heat recycling pipeline is cooled by absorbing heat or cooled and flows back to the extraction cooling heat exchanger. Cooling circulation and ice water loss of the extraction cooling heat exchanger are reduced, heat energy recycling is achieved, and the comprehensive energy utilization rate is greatly increased.

Description

Technical Field

[0001] This utility model relates to the technical field of tea beverage production systems, and in particular to a magnetic levitation centrifugal heat pump heat recovery system. Background Technology

[0002] In the production of tea beverages, a large amount of steam is required to heat the production water for use in heat-consuming production processes, such as the extraction and sugar melting processes (water temperature required to be 80-100℃). At the same time, there are also process units that require cooling, such as the blending process (water temperature required to be 15-20℃). The cold water consumed is generally provided by equipment such as refrigeration units.

[0003] In existing tea beverage production, water needs to be heated to 80℃-100℃ before entering the extraction process. After extraction, the hot water temperature remains above 70℃-80℃, meaning it retains a significant amount of residual heat. This residual heat then needs to be cooled using a cooling device or by mixing with ice water to lower the temperature to 15℃-20℃ before entering the blending tank for the blending process. Therefore, in existing tea beverage production systems, a large amount of residual heat is wasted during production, and a large amount of steam is required to heat the water for the extraction process, as well as additional cooling towers to cool the hot water or to connect large quantities of ice water for the blending process. Overall, the energy efficiency is low. Utility Model Content

[0004] To address the issues of waste heat and low overall energy utilization in the production of tea beverages, this invention provides a magnetic levitation centrifugal heat pump heat recovery system. Hot water from the extraction device is drawn through a heat recovery pipeline, and a high-temperature magnetic levitation centrifugal heat pump unit recovers the waste heat from the hot water. The waste heat and the heat generated by the work performed by the high-temperature magnetic levitation centrifugal compressor are then transferred to the front end of the extraction device and / or the sugar melting device. Simultaneously, the water in the heat recovery pipeline is cooled or de-cooled and returned to the extraction cooling heat exchanger, reducing the cooling cycle and ice water loss in the extraction cooling heat exchanger, achieving heat energy recovery and reuse, and significantly improving the overall energy utilization rate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a magnetic levitation centrifugal heat pump heat recovery system, comprising an extraction pipeline, a sugar melting pipeline, a water outlet pipeline and a heat recovery pipeline, wherein the extraction pipeline is connected in sequence from a hot water tank to an extraction heating heat exchanger, an extraction device, an extraction cooling heat exchanger, a separator and an extraction mixing tank;

[0006] One end of the heat recovery pipeline is connected to the front end of the extraction cooling heat exchanger, and the other end is sequentially connected to the high-temperature heat absorption side of the high-temperature magnetic levitation centrifugal heat pump unit, the low-temperature heat absorption side of the low-temperature magnetic levitation centrifugal heat pump unit, and then back to the extraction cooling heat exchanger.

[0007] The water outlet pipe flows through the high-temperature heat release side of the high-temperature magnetic levitation centrifugal heat pump unit and then splits into two paths. One path is connected to the front end of the extraction device, and the other path is connected to the front end of the sugar melting device in the sugar melting pipe.

[0008] As a further improvement of this utility model: the hot water tank is provided with a water inlet pipe, which enters the hot water tank after passing through the low-temperature heat release side of the low-temperature magnetic levitation centrifugal heat pump unit.

[0009] As a further improvement of this utility model: the high-temperature magnetic levitation centrifugal heat pump unit includes a high-temperature magnetic levitation centrifugal compressor, a high-temperature heat absorption side, and a high-temperature heat release side;

[0010] The high-temperature heat absorption side is provided with a first circulation pipeline and a first heat exchanger. When the refrigerant in the first circulation pipeline flows through the first heat exchanger, it exchanges heat with the hot water in the heat recovery pipeline to absorb waste heat.

[0011] The high-temperature heat release side is provided with a second circulation pipeline and a second heat exchanger. When the refrigerant in the second circulation pipeline flows through the second heat exchanger, it exchanges heat with the water in the outlet pipeline so that the water in the outlet pipeline can transfer heat energy to the extraction device and / or the sugar melting device.

[0012] As a further improvement of this utility model: the low-temperature magnetic levitation centrifugal heat pump unit includes a low-temperature magnetic levitation centrifugal compressor, a low-temperature heat absorption side, and a low-temperature heat release side;

[0013] The low-temperature heat absorption side is provided with a third circulation pipeline and a third heat exchanger. When the refrigerant in the third circulation pipeline flows through the third heat exchanger, it exchanges heat with the hot water in the heat recovery pipeline to absorb waste heat.

[0014] The low-temperature heat release side is provided with a fourth circulation pipeline and a fourth heat exchanger. When the refrigerant in the fourth circulation pipeline flows through the fourth heat exchanger, it exchanges heat with the water in the inlet pipeline so that the water in the inlet pipeline is heated and supplied to the hot water tank.

[0015] As a further improvement of this utility model: the water inlet pipe is divided into two paths, one of which passes through the fourth heat exchanger and exchanges heat with the fourth circulation pipe in the fourth heat exchanger before flowing to the hot water tank, and the other path passes through the water inlet heating heat exchanger before flowing to the hot water tank.

[0016] As a further improvement of this utility model: the sugar melting pipeline is connected in sequence from the hot water tank to the sugar melting heating heat exchanger, the sugar melting device, the sugar melting cooling heat exchanger and the sugar melting mixing tank, and one of the outlet pipelines is connected between the sugar melting heating heat exchanger and the sugar melting device.

[0017] As a further improvement of this utility model: the extraction heating heat exchanger is connected to the external steam heating end, the extraction cooling heat exchanger is equipped with an extraction cooling tower and forms a circulation pipeline with the extraction cooling tower, and the extraction cooling heat exchanger is also connected to the external ice water end in a circulation loop.

[0018] As a further improvement of this utility model: the sugar melting and heating heat exchanger is connected to the external steam heating end, the sugar melting and cooling heat exchanger is equipped with a sugar melting cooling tower and forms a circulation pipeline with the sugar melting cooling tower, and the sugar melting and cooling heat exchanger is also circulatedly connected to the external ice water end.

[0019] As a further improvement of this utility model: the water inlet heating heat exchanger is connected to the external steam heating end.

[0020] Compared with the prior art, this utility model has the following beneficial effects: hot water passing through the extraction device is introduced through a heat recovery pipeline, and the waste heat of the hot water is recovered by a high-temperature magnetic levitation centrifugal heat pump unit. The waste heat and the heat energy generated by the work done by the high-temperature magnetic levitation centrifugal compressor are transferred to the front end of the extraction device and / or the sugar melting device. At the same time, the water in the heat recovery pipeline is cooled or cooled and returned to the extraction cooling heat exchanger, reducing the cooling cycle and ice water loss of the extraction cooling heat exchanger, realizing the recovery and reuse of heat energy, and greatly improving the comprehensive energy utilization rate. Attached Figure Description

[0021] To more clearly illustrate the technical solution, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] The markings in the diagram indicate:

[0024] 100: Extraction tube, 200: Sugar melting pipeline, 300: Water outlet pipeline, 400: Heat recovery pipeline, 500: Water inlet pipeline;

[0025] 1: Hot water tank; 2: Extraction heating heat exchanger; 3: Extraction device; 4: Extraction cooling heat exchanger; 5: Separator; 6: Extraction mixing tank; 7: Sugar melting heating heat exchanger; 8: Sugar melting device; 9: Sugar melting cooling heat exchanger; 10: Sugar melting mixing tank; 11: Inlet water heating heat exchanger.

[0026] 50: High-temperature magnetic levitation centrifugal heat pump unit; 51: High-temperature heat absorption side; 52: High-temperature heat release side; 53: First circulation pipeline; 54: First heat exchanger; 55: Second circulation pipeline; 56: Second heat exchanger; 60: Low-temperature magnetic levitation centrifugal heat pump unit; 61: Low-temperature heat absorption side; 62: Low-temperature heat release side; 63: Third circulation pipeline; 64: Third heat exchanger; 65: Fourth circulation pipeline; 66: Fourth heat exchanger. Detailed Implementation

[0027] In order to clearly and completely understand the technical solution, the present invention will be further described in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] like Figure 1 As shown, an embodiment of this utility model provides a magnetic levitation centrifugal heat pump heat recovery system, including an extraction pipeline 100, a sugar melting pipeline 200, a water outlet pipeline 300, and a heat recovery pipeline 400. The extraction pipeline 100 is connected in sequence from a hot water tank 1 to an extraction heating heat exchanger 2, an extraction device 3, an extraction cooling heat exchanger 4, a separator 5, and an extraction mixing tank 6.

[0032] One end of the heat recovery pipeline 100 is connected to the front end of the extraction cooling heat exchanger 4, and the other end is sequentially connected to the high-temperature heat absorption side 51 of the high-temperature magnetic levitation centrifugal heat pump unit 50 and the low-temperature heat absorption side 61 of the low-temperature magnetic levitation centrifugal heat pump unit 60 before returning to the extraction cooling heat exchanger 4.

[0033] The water outlet pipe 300 flows through the high-temperature heat release side 52 of the high-temperature magnetic levitation centrifugal heat pump unit 50 and then splits into two paths. One path is connected to the front end of the extraction device 3, and the other path is connected to the front end of the sugar melting device 8 of the sugar melting pipe 200.

[0034] In the process of making tea beverages, the extraction process generally has a short extraction time, and the time for heat exchange between hot water and tea leaves is relatively limited, resulting in a small drop in water temperature. When 95℃ hot water is used for extraction, the water temperature after extraction can still be maintained at around 80℃-85℃. At this time, the hot water after passing through the extraction device 3 still has a lot of residual heat. It then needs to be cooled by the extraction cooling heat exchanger 4 or mixed with ice water to cool it down to around 18℃ to meet the requirements of the blending process, so that the extraction blending tank 6 can be used for later use.

[0035] In this embodiment, hot water (before it enters the cooling tower circulation or is mixed with ice water) that has passed through the extraction device and entered the extraction cooling heat exchanger is introduced through a heat recovery pipeline. The waste heat of the hot water is recovered by the high-temperature heat absorption side 51 of the high-temperature magnetic levitation centrifugal heat pump unit 50. The waste heat and the heat energy generated by the work are transferred to the front end of the extraction device 3 through the high-temperature heat release side 52 and the water outlet pipeline 300. At the same time, the water in the heat recovery pipeline 400 is cooled or cooled for use in the process, realizing the recovery and reuse of heat energy and greatly improving the overall energy utilization rate.

[0036] It should be noted that this utility model does not impose any restrictions on the composition and operating principle of the high-temperature / low-temperature magnetic levitation centrifugal heat pump unit. Technical personnel can set it themselves according to actual usage requirements. It generally consists of a magnetic levitation centrifugal compressor, evaporator, condenser, throttling device and control system. The operating principle is to compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas through the compressor, condense and release heat in the condenser (equivalent to the high-temperature / low-temperature heat release side of this utility model), and then reduce the pressure through the throttling device, and absorb heat and evaporate in the evaporator (equivalent to the high-temperature / low-temperature heat absorption side of this utility model) to achieve heat transfer. This utility model will not be described in detail here.

[0037] In an optional embodiment, the hot water tank 1 is provided with a water inlet pipe 500, which enters the hot water tank 1 after passing through the low-temperature heat release side 62 of the low-temperature magnetic levitation centrifugal heat pump unit 60.

[0038] In this embodiment, the hot water in the heat recovery pipeline 400 retains residual heat after being absorbed by the high-temperature magnetic levitation centrifugal heat pump unit 50. Typically, the 80°C hot water is cooled to around 50°C after being absorbed by the high-temperature heat-absorbing side 51 in the high-temperature magnetic levitation centrifugal heat pump unit 50. At this point, the 50°C hot water enters the low-temperature heat-absorbing side 61 of the low-temperature magnetic levitation centrifugal heat pump unit 60, where it is cooled to below 20°C and then flows back to the extraction cooling heat exchanger 4. Simultaneously, the inlet water pipeline 500 exchanges heat through the low-temperature heat-releasing side 62 of the low-temperature magnetic levitation centrifugal heat pump unit 60, raising the temperature of the 18°C ​​water, RO water, purified water, or distilled water at the inlet to 45°C before flowing into the hot water tank 1. In addition to saving steam consumption in heating heat exchangers, it can also reduce cooling and chilled water circulation in cooling heat exchangers, and may even eliminate the need for cooling towers and / or chilled water circulation, thereby reducing the equipment and operating costs of the entire system. The entire process consumes some electricity and a small amount of steam, and the total cost is less than the cost of steam.

[0039] For better understanding, in an optional embodiment, the high-temperature magnetic levitation centrifugal heat pump unit 50 includes a high-temperature magnetic levitation centrifugal compressor, a high-temperature heat absorption side 51, and a high-temperature heat release side 52.

[0040] The high-temperature heat absorption side 51 is provided with a first circulation pipe 53 and a first heat exchanger 54. When the refrigerant in the first circulation pipe 53 flows through the first heat exchanger 54, it exchanges heat with the hot water in the heat recovery pipe 400 to absorb waste heat.

[0041] The high-temperature heat release side 52 is provided with a second circulation pipe 55 and a second heat exchanger 56. When the refrigerant in the second circulation pipe 55 flows through the second heat exchanger 56, it exchanges heat with the water in the outlet pipe 300 so that the water in the outlet pipe 300 transfers heat energy to the extraction device 3 and / or the sugar melting device 8.

[0042] In this embodiment, heat exchange takes place in the first heat exchanger 54 and the second heat exchanger 56 via the first circulation pipeline 53 and the second circulation pipeline 55, respectively. The waste heat of the hot water in the heat recovery pipeline 400 is transferred to the outlet pipeline 300 via the high-temperature magnetic levitation centrifugal heat pump unit 50. The heat energy is then transferred to the extraction device 3 and / or the sugar melting device 8 via the outlet pipeline 300. At the same time, the water that has absorbed heat in the heat recovery pipeline 400 flows back to the extraction cooling heat exchanger 4. After mixing and cooling with the water in the extraction cooling heat exchanger 4, the water flows to the separator 5 and the extraction mixing tank 6.

[0043] Specifically, the high-temperature magnetic levitation centrifugal heat pump unit 50 absorbs the waste heat of the 80°C hot water in the heat recovery pipeline and heats the 45°C water in the outlet pipeline 300 to above 80°C. The steam from the extraction heating heat exchanger 3 and / or the sugar melting heating heat exchanger 8 is used as an auxiliary to heat the water to 90°C before supplying the water to the extraction device 3 and / or the sugar melting device 8. The entire process consumes some electricity and a small amount of steam, and the total cost is less than the cost of steam.

[0044] For better understanding, in an optional embodiment, the low-temperature magnetic levitation centrifugal heat pump unit 60 includes a low-temperature magnetic levitation centrifugal compressor, a low-temperature heat absorption side 61, and a low-temperature heat release side 62;

[0045] The low-temperature heat absorption side 61 is provided with a third circulation pipe 63 and a third heat exchanger 64. When the refrigerant in the third circulation pipe 63 flows through the third heat exchanger 64, it exchanges heat with the hot water in the heat recovery pipe 400 to absorb waste heat.

[0046] The low-temperature heat release side 62 is provided with a fourth circulation pipe 65 and a fourth heat exchanger 66. When the refrigerant in the fourth circulation pipe 65 flows through the fourth heat exchanger 66, it exchanges heat with the water in the inlet pipe 500 so that the water in the inlet pipe 500 is heated and supplied to the hot water tank 1.

[0047] In this embodiment, heat exchange occurs in the third heat exchanger 64 and the fourth heat exchanger 66 via the third circulation pipe 63 and the fourth circulation pipe 65, respectively. The waste heat of the hot water in the heat recovery pipe 400 is transferred to the inlet pipe 500 and the hot water tank 1 via the low-temperature magnetic levitation centrifugal heat pump unit 60. At the same time, the water that has absorbed heat in the heat recovery pipe 400 flows back to the extraction cooling heat exchanger 4, where it mixes with the water in the extraction cooling heat exchanger 4, is cooled, and then flows to the separator 5 and the extraction mixing tank 6.

[0048] Specifically, the low-temperature magnetic levitation centrifugal heat pump unit 60 reheats the water in the heat recovery pipeline (which has already absorbed heat from the high-temperature magnetic levitation centrifugal heat pump unit at 53°C) and heats the water in the inlet pipeline 500 to 45°C before entering the hot water tank 1. Meanwhile, the water in the heat recovery pipeline 400, after undergoing secondary heat absorption, cools to 18°C ​​and flows back to the extraction cooling heat exchanger 4. There, it mixes with the water in the extraction cooling heat exchanger 4, cools further, and then flows to the separator 5 and the extraction mixing tank 6. This reduces the circulation losses of the cooling tower and chilled water. The entire process consumes some electricity and a small amount of steam, resulting in a total cost less than the steam cost.

[0049] In an optional embodiment, the water inlet pipe 500 is divided into two paths. One path passes through the fourth heat exchanger 66 and exchanges heat with the fourth circulation pipe 65 in the fourth heat exchanger 66 before flowing to the hot water tank 1. The other path passes through the water inlet heating heat exchanger 11 before flowing to the hot water tank 1.

[0050] In an optional embodiment, the sugar melting pipeline 200 is connected in sequence from the hot water tank 1 to the sugar melting heating heat exchanger 7, the sugar melting device 8, the sugar melting cooling heat exchanger 9, and the sugar melting mixing tank 10, and one of the outlet pipelines 300 is connected between the sugar melting heating heat exchanger 7 and the sugar melting device 8.

[0051] In this embodiment, the outlet pipe 300 absorbs the waste heat of the hot water from the heat recovery pipe 400 through the high-temperature magnetic levitation centrifugal heat pump unit 50. In the second heat exchanger 56, the water from the hot water tank 1, initially at 45°C, is heated to 80°C. Then, the water is split into two streams and mixed with the high-temperature hot water from the extraction heating heat exchanger 2 and the sugar melting heating heat exchanger 7, respectively. These hot water streams are then supplied to the extraction device 3 and the sugar melting device 8. Since the sugar melting process requires a large amount of heat, hot water above 80°C typically cools to around 50°C after the process. In this embodiment, the 50°C water is directly cooled and circulated through the sugar melting cooling heat exchanger 9, or mixed with ice water, and then cooled to 18°C ​​before being supplied to the sugar melting mixing tank 10.

[0052] In an optional embodiment, the extraction heating heat exchanger 2 is connected to an external steam heating end and heated by steam. Alternatively, it can be heated by circulating hot water from an external heat source using electric heating, depending on actual usage requirements. The extraction cooling heat exchanger 4 is equipped with an extraction cooling tower 41 and forms a circulation pipeline with the extraction cooling tower 41. The extraction cooling heat exchanger 4 is also circulated to an external ice water end 42.

[0053] In an optional embodiment, the sugar melting and heating heat exchanger 7 is connected to an external steam heating end and heated by steam. Alternatively, it can be heated by circulating hot water from an external heat source using electric heating, depending on actual usage requirements. The sugar melting and cooling heat exchanger 9 is equipped with a sugar melting cooling tower 91 and forms a circulation pipeline with the sugar melting cooling tower 91. The sugar melting and cooling heat exchanger 9 is also circulatedly connected to an external ice water end 92.

[0054] In an optional embodiment, the inlet water heating heat exchanger 11 is connected to an external steam heating end and heated by steam. Alternatively, it can be heated by circulating hot water from an external heat source using electric heating, depending on actual usage requirements.

[0055] The above disclosure is only one or more preferred embodiments of the present utility model, used to help understand the inventive concept of the technical solution, and is not intended to limit the present utility model in any other way. Any other equivalent or conventional substitution schemes made by those skilled in the art based on the features defined by the present utility model shall still fall within the scope of the present utility model.

Claims

1. A magnetic levitation centrifugal heat pump heat recovery system, characterized in that: It includes an extraction pipeline, a sugar melting pipeline, a water outlet pipeline, and a heat recovery pipeline. The extraction pipeline is connected in sequence from a hot water tank to an extraction heating heat exchanger, an extraction device, an extraction cooling heat exchanger, a separator, and an extraction mixing tank. One end of the heat recovery pipeline is connected to the front end of the extraction cooling heat exchanger, and the other end is sequentially connected to the high-temperature heat absorption side of the high-temperature magnetic levitation centrifugal heat pump unit, the low-temperature heat absorption side of the low-temperature magnetic levitation centrifugal heat pump unit, and then back to the extraction cooling heat exchanger. The water outlet pipe flows through the high-temperature heat release side of the high-temperature magnetic levitation centrifugal heat pump unit and then splits into two paths. One path is connected to the front end of the extraction device, and the other path is connected to the front end of the sugar melting device in the sugar melting pipe.

2. The magnetic levitation centrifugal heat pump heat recovery system according to claim 1, characterized in that: The hot water tank is equipped with an inlet pipe, which enters the hot water tank after passing through the low-temperature heat release side of the low-temperature magnetic levitation centrifugal heat pump unit.

3. The magnetic levitation centrifugal heat pump heat recovery system according to claim 1, characterized in that: The high-temperature magnetic levitation centrifugal heat pump unit includes a high-temperature magnetic levitation centrifugal compressor, a high-temperature heat absorption side, and a high-temperature heat release side. The high-temperature heat absorption side is provided with a first circulation pipeline and a first heat exchanger. When the refrigerant in the first circulation pipeline flows through the first heat exchanger, it exchanges heat with the hot water in the heat recovery pipeline to absorb waste heat. The high-temperature heat release side is provided with a second circulation pipeline and a second heat exchanger. When the refrigerant in the second circulation pipeline flows through the second heat exchanger, it exchanges heat with the water in the outlet pipeline so that the water in the outlet pipeline can transfer heat energy to the extraction device and / or the sugar melting device.

4. The magnetic levitation centrifugal heat pump heat recovery system according to claim 2, characterized in that: The low-temperature magnetic levitation centrifugal heat pump unit includes a low-temperature magnetic levitation centrifugal compressor, a low-temperature heat absorption side, and a low-temperature heat release side; The low-temperature heat absorption side is provided with a third circulation pipeline and a third heat exchanger. When the refrigerant in the third circulation pipeline flows through the third heat exchanger, it exchanges heat with the hot water in the heat recovery pipeline to absorb waste heat. The low-temperature heat release side is provided with a fourth circulation pipeline and a fourth heat exchanger. When the refrigerant in the fourth circulation pipeline flows through the fourth heat exchanger, it exchanges heat with the water in the inlet pipeline so that the water in the inlet pipeline is heated and supplied to the hot water tank.

5. The magnetic levitation centrifugal heat pump heat recovery system according to claim 4, characterized in that: The water inlet pipe is divided into two paths. One path passes through the fourth heat exchanger and exchanges heat with the fourth circulation pipe in the fourth heat exchanger before flowing to the hot water tank. The other path passes through the water inlet heating heat exchanger before flowing to the hot water tank.

6. The magnetic levitation centrifugal heat pump heat recovery system according to claim 1, characterized in that: The sugar melting pipeline is connected in sequence from the hot water tank to the sugar melting heating heat exchanger, the sugar melting device, the sugar melting cooling heat exchanger, and the sugar melting mixing tank. One of the outlet pipelines is connected between the sugar melting heating heat exchanger and the sugar melting device.

7. The magnetic levitation centrifugal heat pump heat recovery system according to claim 1, characterized in that: The extraction heating heat exchanger is connected to an external steam heating end, the extraction cooling heat exchanger is equipped with an extraction cooling tower and forms a circulation pipeline with the extraction cooling tower, and the extraction cooling heat exchanger is also connected to an external ice water end.

8. The magnetic levitation centrifugal heat pump heat recovery system according to claim 6, characterized in that: The sugar melting and heating heat exchanger is connected to an external steam heating end, the sugar melting and cooling heat exchanger is equipped with a sugar melting cooling tower and forms a circulation pipeline with the sugar melting cooling tower, and the sugar melting and cooling heat exchanger is also circulated to an external ice water end.

9. The magnetic levitation centrifugal heat pump heat recovery system according to claim 5, characterized in that: The water inlet heating heat exchanger is connected to the external steam heating end.

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