High-temperature heat pump system

Abstract

The invention relates to the technical field of heat pumps, in particular to a high-temperature heat pump system which comprises a first centrifugal compressor unit, a second centrifugal compressor unit, a steam generator, a steam superheater, an evaporator and a cooler. An outlet of the evaporator, the first centrifugal compressor unit and the second centrifugal compressor unit are sequentially communicated, an outlet of the first centrifugal compressor unit is sequentially communicated with the steam generator and the steam superheater, and the first centrifugal compressor unit is used for forming saturated steam and conveying the saturated steam into the steam superheater; an outlet of the second centrifugal compressor unit communicates with the steam superheater, and the second centrifugal compressor unit is used for forming a superheated gas phase working medium; and a liquid phase working medium outlet of the steam generator is sequentially communicated with the cooler and the evaporator. The combined centrifugal compressor is used for treating the gas-phase working medium, the high-temperature working medium is used for further overheating the saturated steam, the heat energy output upper limit temperature of the centrifugal heat pump unit is broken through, and use in more scenes is met.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and in particular to a high-temperature heat pump system. Background Art

[0002] With the rapid advancement of global industrialization, energy consumption has risen sharply, and improving energy efficiency has become the key to alleviating the energy crisis and reducing environmental pollution. In the industrial production process, a large amount of low-temperature waste heat resources are directly discharged, such as flue gas, cooling water, etc. The temperature of these waste heat resources is usually between 15-30°C, which contains huge potential for utilization. As an efficient way of energy conversion and utilization, heat pump technology transfers heat from low-temperature heat sources to high-temperature heat sources by consuming a small amount of electricity, thereby realizing the "upgraded" utilization of heat. In the industrial field, heat pump technology is widely used in waste heat recovery, district heating, process heating and other scenarios, providing strong support for industrial energy conservation and consumption reduction.

[0003] Centrifugal heat pump units have occupied a place in the industrial heat pump market with their high efficiency, stability and reliability. Its advantages are mainly reflected in high heating temperature, large single-unit capacity, and a wide range of waste heat utilization. However, with the continuous upgrading of industrial production's demand for thermal energy, the limitations of traditional centrifugal heat pump units in terms of thermal energy output capacity have gradually emerged. At present, the outlet water temperature of most centrifugal heat pump units is below 80°C, which is difficult to meet some application scenarios that require high-temperature and high-pressure superheated steam, such as thermal power generation, petroleum cracking, food drying, etc. These scenarios require steam temperatures to exceed 100°C, or even reach above 140°C, in order to improve thermal efficiency, ensure product quality or meet specific process requirements.

[0004] Therefore, how to overcome the shortcomings of traditional centrifugal heat pump units in thermal energy output capacity and provide stable superheated steam with high temperature and high pressure can not only meet the needs of more industrial application scenarios, but also improve energy utilization efficiency, reduce energy consumption and carbon emissions, and promote green and low-carbon industrial development. Summary of the invention

[0005] In order to solve the above technical problems existing in the prior art, the present invention provides a high-temperature heat pump system, which can generate high-quality superheated steam through the combined use of centrifugal compressors.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: The present invention provides a high-temperature heat pump system, comprising a first centrifugal compressor unit, a second centrifugal compressor unit, a steam generator, a steam superheater, an evaporator and a cooler; the first centrifugal compressor unit and the second centrifugal compressor unit are used to compress the gaseous working medium in sequence, and the inlet of the evaporator is connected to the waste hot water delivery pipeline; the outlet of the evaporator, the first centrifugal compressor unit, and the second centrifugal compressor unit are connected in sequence, and the outlet of the first centrifugal compressor unit is connected in sequence with the steam generator and the steam superheater to form saturated steam and transport the saturated steam to the steam superheater; the outlet of the second centrifugal compressor unit is connected with the steam superheater, and the second centrifugal compressor unit is used to form superheated gaseous working medium; the liquid working medium outlet of the steam generator is connected in sequence with the cooler and the evaporator.

[0007] The above-mentioned technical scheme provided by the present invention utilizes centrifugal compressors of different stages to perform different treatments on the gas phase working medium, wherein the first centrifugal compressor unit of the previous stage compresses the gas phase working medium to form a high-temperature and high-pressure gas phase working medium, and the formed high-temperature and high-pressure gas phase working medium is divided into two parts, one part of the high-temperature and high-pressure gas phase working medium enters the steam generator to form saturated steam, and the saturated steam enters the steam superheater, and the other part of the high-temperature and high-pressure gas phase working medium enters the second centrifugal compressor unit of the next stage for further compression to form a superheated gas phase working medium, and this part of the superheated gas phase working medium enters the steam superheater to superheat the saturated steam, thereby forming a high-temperature and high-quality superheated steam, the temperature of the superheated steam can be as high as 140°C, breaking through the upper limit temperature of the thermal energy output of the centrifugal heat pump unit and meeting the use in more scenarios; by recycling and utilizing the waste hot water resources, the circulation of the working medium in the entire high-temperature heat pump system is realized.

[0008] On the basis of the above technical solution, the present invention can also make the following improvements: Furthermore, it also includes a regenerator, which is arranged between the cooler and the evaporator and is used for supercooling the liquid phase working medium.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that after the liquid phase working medium - refrigerant enters the regenerator, it is cooled by the gas phase working medium at the outlet of the evaporator, thereby achieving further supercooling of the liquid phase working medium to form a supercooled liquid phase working medium, thereby improving the subsequent heat exchange efficiency of the supercooled liquid phase working medium in the evaporator.

[0010] Furthermore, the liquid-phase working medium inlet of the regenerator is connected to the outlet of the cooler, the supercooled liquid-phase working medium outlet of the regenerator is connected to the evaporator through a first pipeline, and an expansion valve is provided on the first pipeline; the gas-phase working medium outlet of the evaporator is connected to the gas-phase working medium inlet of the regenerator.

[0011] The beneficial effect of adopting the above-mentioned further technical scheme is that the supercooled liquid working fluid is subjected to the throttling and pressure reduction treatment of the expansion valve and enters the evaporator. In the evaporator, the working fluid absorbs the heat of the waste hot water, which is a low-temperature heat source, and is transformed into a gaseous state. After that, the gaseous working fluid enters the regenerator and absorbs the heat of the liquid working fluid. Subsequently, the gaseous working fluid enters the compressor, thereby completing the entire cycle process.

[0012] Furthermore, the first centrifugal compressor unit includes a first-stage centrifugal compressor, a second-stage centrifugal compressor, and a third-stage centrifugal compressor, and the gas phase working medium passes through the first-stage centrifugal compressor, the second-stage centrifugal compressor, and the third-stage centrifugal compressor in sequence, and the second centrifugal compressor unit includes a four-stage centrifugal compressor.

[0013] The beneficial effect of adopting the above further technical solution is that the gas phase working medium is compressed in sequence by using three-stage series-connected centrifugal compressors to form a high-temperature and high-pressure gas phase working medium.

[0014] Furthermore, the first-stage centrifugal compressor and the second-stage centrifugal compressor are driven by a first transmission shaft, and the third-stage centrifugal compressor and the fourth-stage centrifugal compressor are driven by a second transmission shaft.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is: adopting a two-shaft four-stage combined centrifugal compressor can reduce the volume of the compressor unit, and at the same time can achieve different speeds of compressors at different stages, and the speed of each stage of compressor is independently designed to achieve theoretical optimization of stage efficiency.

[0016] Furthermore, the cooler includes a first cooler and a second cooler, the first cooler is used to form a first supplementary gas phase working fluid and a liquid phase working fluid, the second cooler is used to form a second supplementary gas phase working fluid and a liquid phase working fluid, the first supplementary gas phase working fluid is transported to a three-stage centrifugal compressor, and the second supplementary gas phase working fluid is transported to a two-stage centrifugal compressor.

[0017] Furthermore, the first cooler includes a first tube side and a first shell side, and a first throttle valve is provided on the inlet pipeline of the first tube side; the second cooler includes a second tube side and a second shell side, and a second throttle valve is provided on the inlet pipeline of the second tube side.

[0018] The beneficial effect of adopting the above-mentioned further technical scheme is that: the first shell side contains high-temperature and high-pressure liquid-phase working medium from the steam generator, and the first tube side contains low-temperature two-phase working medium after throttling and reducing the pressure by the first throttle valve. The first throttle valve allows the high-temperature and high-pressure liquid-phase working medium-refrigerant to pass through at room temperature, and becomes a low-pressure and low-temperature liquid refrigerant, and produces a small amount of flash gas, thereby achieving the purpose of absorbing heat from the outside. After the high-temperature and high-pressure liquid-phase working medium and the low-temperature two-phase working medium exchange heat in the first cooler, the low-temperature two-phase working medium in the first tube side is heated to a saturated gas-phase working medium. The saturated gas-phase working medium enters the three-stage centrifugal compressor as the first supplementary gas-phase working medium for gas replenishment operation, and the liquid-phase working medium in the first shell side enters the second cooler, repeats the above process to form a second supplementary gas-phase working medium, and enters the two-stage centrifugal compressor for gas replenishment operation, and the liquid-phase working medium in the second shell side enters the regenerator or evaporator to form a gas-phase working medium again through heat exchange, thereby completing the entire cycle process.

[0019] Furthermore, the temperature of the waste hot water in the waste hot water delivery pipeline is 15-25°C.

[0020] Furthermore, the outlet of the steam superheater outputs superheated steam, and the temperature of the superheated steam is greater than 140°C.

[0021] Compared with the prior art, the present invention has the following technical effects: The high-temperature heat pump system provided by the present invention utilizes a two-shaft four-stage combined centrifugal compressor to process the gas phase working medium, and utilizes the high-temperature working medium to further superheat the saturated steam, thereby breaking through the upper limit temperature of the heat energy output of the centrifugal heat pump unit and meeting the use in more scenarios; The first three stages of centrifugal compressors compress the gas phase to form high-temperature and high-pressure gas phase. The formed high-temperature and high-pressure gas phase is divided into two parts. One part of the high-temperature and high-pressure gas phase enters the steam generator to form saturated steam, which then enters the steam superheater. The other part of the high-temperature and high-pressure gas phase enters the four-stage centrifugal compressor for further compression to form superheated gas phase. This part of the superheated gas phase also enters the steam superheater to superheat the saturated steam, thereby forming high-temperature and high-quality superheated steam. The temperature of the superheated steam can be as high as 140°C. Through the setting of coolers and regenerators, the liquid working fluid can be cooled, which is beneficial to the heat exchange between the liquid working fluid and the low-temperature heat source in the evaporator, and the conversion of the liquid working fluid to the gaseous working fluid is completed, thereby realizing the recycling of low-temperature waste water resources of 15-25°C. Through the use of waste water, the working fluid can be circulated in the entire high-temperature heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram showing a high temperature heat pump system according to an embodiment of the present invention; Reference numerals: 1. Steam generator; 2. Steam superheater; 3. Evaporator; 4. Regenerator; 5. Expansion valve; 6. One-stage centrifugal compressor; 7. Two-stage centrifugal compressor; 8. Three-stage centrifugal compressor; 9. Four-stage centrifugal compressor; 10. First cooler; 11. Second cooler; 12. First solenoid valve; 13. First throttle valve; 14. Second throttle valve; 15. Second solenoid valve. DETAILED DESCRIPTION

[0023] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0024] See also Figure 1A high-temperature heat pump system comprises a first centrifugal compressor unit and a second centrifugal compressor unit, wherein the first centrifugal compressor unit comprises a first-stage centrifugal compressor 6, a second-stage centrifugal compressor 7, and a third-stage centrifugal compressor 8 which are sequentially connected in series, and the second centrifugal compressor unit comprises a fourth-stage centrifugal compressor 9; further comprising a steam generator 1, a steam superheater 2, an evaporator 3, a regenerator 4, a first cooler 10, and a second cooler 11; the first-stage centrifugal compressor 6, the second-stage centrifugal compressor 7, the third-stage centrifugal compressor 8, and the fourth-stage centrifugal compressor 9 are sequentially connected in series to form a compressor head, and the centrifugal compressor is a two-axis four-stage combined compressor, wherein the first-stage centrifugal compressor 6 and the second-stage centrifugal compressor 7 are driven by a first transmission shaft, and the third-stage centrifugal compressor 8 and the fourth-stage centrifugal compressor 9 are driven by a second transmission shaft, and the first-stage centrifugal compressor 6, the second-stage centrifugal compressor 7, the third-stage centrifugal compressor 8, and the fourth-stage centrifugal compressor 9 are used to compress a gas phase working medium in sequence, and the gas phase working medium passes through the first three centrifugal compressors. After compression by the first-stage centrifugal compressor, a high-temperature and high-pressure gaseous working medium is formed. The first-stage centrifugal compressor 6, the second-stage centrifugal compressor 7, and the third-stage centrifugal compressor 8 are connected in sequence. The outlet of the third-stage centrifugal compressor 8, the steam generator 1, and the steam superheater 2 are connected in sequence. The high-temperature and high-pressure gaseous working medium outputted through the outlet of the third-stage centrifugal compressor 8 is transported to the steam generator 1 for condensation treatment, and saturated steam is generated at the same time. The generated saturated steam enters the steam superheater 2; the outlet of the fourth-stage centrifugal compressor 9 is connected to the steam superheater 2, and the fourth-stage centrifugal compressor 9 is used to further compress the high-temperature and high-pressure gaseous working medium to form a superheated gaseous working medium. The superheated gaseous working medium enters the steam superheater 2, and the saturated steam is superheated to form a high-temperature and high-quality superheated steam. The temperature of the superheated steam is greater than 140°C. The high-temperature and high-quality superheated steam has a stable pressure without fluctuations, has a low water content or does not contain water, and the superheated steam has a high cleanliness and a low impurity content.

[0025] In the high-temperature heat pump system, the gas phase working medium is compressed by the first three stages of centrifugal compressors to form a high-temperature and high-pressure gas phase working medium. After the high-temperature and high-pressure gas phase working medium is output through the outlet of the three-stage centrifugal compressor 8, it is divided into two parts. One part is transported to the steam generator 1 through a pipeline to generate saturated steam, and the saturated steam subsequently enters the steam superheater 2; the other part enters the four-stage centrifugal compressor 9 to form a superheated gas phase working medium, and this part of the superheated gas phase working medium enters the steam superheater 2 to superheat the saturated steam, thereby forming high-temperature and high-quality superheated steam, realizing the combined application of centrifugal compressors.

[0026] A first solenoid valve 12 is provided on the connecting pipeline between the outlet of the three-stage centrifugal compressor 8 and the inlet of the four-stage centrifugal compressor 9. The first solenoid valve 12 is used to adjust the flow rate of the working fluid from the outlet of the three-stage centrifugal compressor 8 to the inlet of the four-stage centrifugal compressor 9 to meet the requirements of different working conditions.

[0027] The steam generator 1 is a falling film steam generator.

[0028] The steam superheater 2 is a shell and tube heat exchanger.

[0029] The steam generator 1 is provided with a water inlet for replenishing water into the steam generator 1. After the high-temperature and high-pressure gas phase medium enters the steam generator 1, it exchanges heat with water. The water absorbs the heat of the high-temperature and high-pressure gas phase medium to form saturated steam, and the high-temperature and high-pressure gas phase medium condenses into a high-temperature and high-pressure liquid phase medium, thereby completing the conversion of the gas phase medium into the liquid phase medium. The replenishing water is softened water to reduce the generation of scale in the steam generator 1.

[0030] The saturated steam and the superheated gas phase working medium perform heat exchange in the steam superheater 2, thereby generating superheated steam, the temperature of which can reach 140°C.

[0031] After the superheated gas phase medium exchanges heat with the saturated steam, the relatively low temperature superheated gas phase medium is mixed with the high temperature and high pressure gas phase medium delivered by the three-stage centrifugal compressor 8 through the pipeline, and the mixed gas phase medium enters the steam generator 1 together to exchange heat with water, thereby generating saturated steam. A second solenoid valve 15 is provided on the outlet pipeline of the relatively low temperature superheated gas phase medium of the steam superheater 2, which is used to adjust the flow rate of the relatively low temperature superheated gas phase medium.

[0032] The liquid phase working medium outlet of the steam generator 1, the first cooler 10, the second cooler 11, the regenerator 4, and the evaporator 3 are connected in sequence for converting the liquid phase working medium into a gas phase working medium. The first cooler 10 includes a first tube side and a first shell side, and a first throttle valve 13 is provided on the inlet pipeline of the first tube side. The second cooler 11 includes a second tube side and a second shell side, and a second throttle valve 14 is provided on the inlet pipeline of the second tube side. The first cooler 10 is used to form a first supplementary gas phase working medium and a liquid phase working medium, and the second cooler 11 is used to form a second supplementary gas phase working medium and a liquid phase working medium. The first supplementary gas phase working medium is transported to the three-stage centrifugal compressor 8, and the second supplementary gas phase working medium is transported to the two-stage centrifugal compressor 7.

[0033] After the high-temperature and high-pressure gaseous working medium enters the steam generator 1, it forms a high-temperature and high-pressure liquid-phase working medium. After being transported through the pipeline, this part of the high-temperature and high-pressure liquid-phase working medium is divided into two parts, one of which enters the first shell side of the first cooler 10, and the other part is throttled by the first throttle valve 13 to form a low-temperature two-phase working medium and then enters the first tube side of the first cooler 10. The two parts of working medium with different temperatures and pressures are heat exchanged in the first cooler 10. Specifically, the low-temperature two-phase working medium in the first tube side absorbs the heat of the liquid-phase working medium in the first shell side and becomes a saturated gas-phase working medium. This part of the saturated gas-phase working medium enters the three-stage centrifugal compressor 8 for inter-stage air replenishment operation; and in the first shell side, the low-temperature two-phase working medium in the first tube side absorbs the heat of the liquid-phase working medium in the first shell side and becomes a saturated gas-phase working medium. The liquid-phase working medium is transported through the pipeline and then divided into two parts again. One part enters the second shell side of the second cooler 11, and the other part is throttled by the second throttle valve 14 to form a low-temperature two-phase working medium and then enters the second pipe side of the second cooler 11. The two parts of working medium with different temperatures and pressures exchange heat in the second cooler 11. Specifically, the low-temperature two-phase working medium in the second pipe side absorbs the heat of the liquid-phase working medium in the second shell side and becomes a saturated gas-phase working medium. This part of the saturated gas-phase working medium enters the secondary centrifugal compressor 7 for inter-stage air replenishment operation, and the liquid-phase working medium in the second shell side enters the regenerator 4 through the pipeline to achieve further supercooling to form a supercooled liquid-phase working medium.

[0034] The inlet of the evaporator 3 is connected to the waste hot water delivery pipeline, and the supercooled liquid working medium enters the evaporator 3 through the first pipeline. The first pipeline is provided with an expansion valve 5. The supercooled liquid working medium enters the evaporator 3 after throttling and pressure reduction treatment of the expansion valve 5 to increase the supercooling degree of the liquid working medium; in the evaporator 3, the supercooled liquid working medium exchanges heat with the waste hot water, and the supercooled liquid working medium absorbs the heat of the waste hot water and is transformed into a gas state, completing the conversion of the liquid working medium into the gas working medium. After that, these gas working mediums enter the regenerator 4 and exchange heat with the liquid working medium delivered from the second shell side of the second cooler 11, that is, the gas working medium supercools the liquid working medium to form a supercooled liquid working medium, and the gas working medium absorbs heat and heats up and enters the first-stage centrifugal compressor 6 through the pipeline, thereby completing the entire circulation process.

[0035] During the entire cycle, after the high-temperature and high-pressure liquid working medium is output from the steam generator 1, it is cooled by the first cooler 10, the second cooler 11, and the regenerator 4 in sequence, and then enters the evaporator 3, absorbs the heat of the low-temperature waste water with a temperature of 15-25°C and becomes gaseous, completing the conversion of the liquid working medium into the gaseous working medium; by sequentially setting the first cooler 10, the second cooler 11, and the regenerator 4, the temperature of the high-temperature and high-pressure liquid working medium is gradually reduced, which is beneficial to the heat exchange with the low-temperature waste water in the evaporator 3, thereby being able to recover the waste heat resources below 25°C.

[0036] The heat pump system of the present invention adopts a two-axis four-stage combined centrifugal compressor, and utilizes the different roles played by centrifugal compressors of different stages in the system. The saturated steam is further superheated by a high-temperature working medium to form the required high-temperature and high-quality superheated steam, thereby breaking through the upper limit temperature of the thermal energy output of the centrifugal heat pump unit and meeting the use in more scenarios.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature heat pump system, comprising an evaporator (3), characterized in that: The evaporator (3) further comprises a first centrifugal compressor unit, a second centrifugal compressor unit, a steam generator (1), a steam superheater (2) and a cooler; the first centrifugal compressor unit and the second centrifugal compressor unit are used to compress the gas phase working medium in sequence, and the inlet of the evaporator (3) is connected to the waste hot water delivery pipeline; the outlet of the evaporator (3), the first centrifugal compressor unit and the second centrifugal compressor unit are connected in sequence, and the outlet of the first centrifugal compressor unit is connected in sequence to the steam generator (1) and the steam superheater (2) for forming saturated steam and delivering the saturated steam to the steam superheater (2); the outlet of the second centrifugal compressor unit is connected to the steam superheater (2), and the second centrifugal compressor unit is used to form superheated gas phase working medium; the liquid phase working medium outlet of the steam generator (1) is connected in sequence to the cooler and the evaporator (3).

2. The high temperature heat pump system according to claim 1, characterized in that: It also comprises a regenerator (4), which is arranged between the cooler and the evaporator (3) and is used for supercooling the liquid phase working medium.

3. The high temperature heat pump system according to claim 2, characterized in that: The liquid phase working medium inlet of the regenerator (4) is communicated with the outlet of the cooler, the supercooled liquid phase working medium outlet of the regenerator (4) is communicated with the evaporator (3) via a first pipeline, and an expansion valve (5) is provided on the first pipeline; the gas phase working medium outlet of the evaporator (3) is communicated with the gas phase working medium inlet of the regenerator (4).

4. The high temperature heat pump system according to any one of claims 1 to 3, characterized in that: The first centrifugal compressor unit comprises a first-stage centrifugal compressor (6), a second-stage centrifugal compressor (7), and a third-stage centrifugal compressor (8), and the gas phase working medium passes through the first-stage centrifugal compressor (6), the second-stage centrifugal compressor (7), and the third-stage centrifugal compressor (8) in sequence, and the second centrifugal compressor unit comprises a fourth-stage centrifugal compressor (9).

5. The high temperature heat pump system according to claim 4, characterized in that: The first-stage centrifugal compressor (6) and the second-stage centrifugal compressor (7) are driven by a first transmission shaft, and the third-stage centrifugal compressor (8) and the fourth-stage centrifugal compressor (9) are driven by a second transmission shaft.

6. The high temperature heat pump system according to claim 4, characterized in that: The cooler comprises a first cooler (10) and a second cooler (11); the first cooler (10) is used to form a first supplementary gas phase working medium and a liquid phase working medium; the second cooler (11) is used to form a second supplementary gas phase working medium and a liquid phase working medium; the first supplementary gas phase working medium is transported to a three-stage centrifugal compressor (8); and the second supplementary gas phase working medium is transported to a two-stage centrifugal compressor (7).

7. The high temperature heat pump system according to claim 6, characterized in that: The first cooler (10) comprises a first tube side and a first shell side, and a first throttle valve (13) is provided on the inlet pipeline of the first tube side; the second cooler (11) comprises a second tube side and a second shell side, and a second throttle valve (14) is provided on the inlet pipeline of the second tube side.

8. The high temperature heat pump system according to any one of claims 1 to 3, characterized in that: The temperature of the waste hot water in the waste hot water delivery pipeline is 15-25°C.

9. The high temperature heat pump system according to any one of claims 1 to 3, characterized in that: The outlet of the steam superheater (2) outputs superheated steam, and the temperature of the superheated steam is greater than 140°C.

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