High temperature steam heat pump external intelligent cooling and heat recovery system and control method

Abstract

The application discloses a high-temperature steam heat pump external intelligent cooling and heat recovery system and a control method, relates to the technical field of heat pumps, and provides the high-temperature steam heat pump external intelligent cooling and heat recovery system, which comprises a waste heat system, a high-temperature steam heat pump system, a cooling and heat recovery system, an internal cooling oil system and a controller. The working medium of the high-temperature steam heat pump system exchanges heat with the waste heat fluid of the waste heat system through a heat pump evaporator. The internal cooling oil system is used for providing cooling oil for the high-temperature steam heat pump system. The cooling and heat recovery system is used for cooling the cooling oil of the internal cooling oil system. The medium water of the cooling and heat recovery system is transmitted to a heat pump condensation evaporator after exchanging heat with the waste heat fluid of the waste heat system through a first heat exchanger. The waste heat system, the high-temperature steam heat pump system, the cooling and heat recovery system and the internal cooling oil system are all in communication connection with the controller. The technical scheme provided by the application can improve the utilization rate of the waste heat fluid heat.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heat pumps, in particular to a high-temperature steam heat pump external intelligent cooling and heat recovery system and a control method. BACKGROUND

[0002] With the increasing global attention to energy saving and emission reduction and sustainable development, the application of heat pump energy saving technology in industrial and living fields is becoming increasingly important. In the field of heat pump energy saving technology, as a kind of efficient energy conversion equipment, the performance optimization and energy recovery of a high-temperature steam heat pump system become the key research direction. However, in terms of waste heat recovery, the current high-temperature steam heat pump system mainly relies on single heat exchange between an evaporator and a waste heat water system, lacks flexible system dynamic adjustment and fine heat recovery mechanism, causes low energy recovery efficiency of low-grade waste heat, and a large amount of residual heat energy carried by the waste heat water after heat exchange is wasted, which seriously limits the improvement of the overall energy utilization rate of the system. SUMMARY

[0003] The main purpose of the application is to provide a high-temperature steam heat pump external intelligent cooling and heat recovery system and a control method, which aims to improve the utilization rate of waste heat fluid heat.

[0004] To achieve the above-mentioned purpose, the high-temperature steam heat pump external intelligent cooling and heat recovery system provided by the application comprises a waste heat system, a high-temperature steam heat pump system, a cooling and heat recovery system, an internal cooling oil system and a controller.

[0005] The waste heat system comprises a waste heat inlet pipe, a heat pump evaporator, a first waste heat outlet pipe, a first heat exchanger and a second waste heat outlet pipe connected in sequence.

[0006] The high-temperature steam heat pump system comprises the heat pump evaporator, a first heat pump connecting pipe, a heat pump compressor, a second heat pump connecting pipe, a heat pump condenser evaporator and a third heat pump connecting pipe connected in sequence, the third heat pump connecting pipe is connected with the heat pump evaporator, and the working medium of the high-temperature steam heat pump system exchanges heat with the waste heat fluid of the waste heat system through the heat pump evaporator.

[0007] The internal cooling oil system is used for providing cooling oil for the high-temperature steam heat pump system.

[0008] The cooling and heat recovery system is used for cooling the cooling oil of the internal cooling oil system, and the medium water of the cooling and heat recovery system is transmitted to the heat pump condenser evaporator after exchanging heat with the waste heat fluid of the waste heat system through the first heat exchanger.

[0009] The waste heat system, the high-temperature steam heat pump system, the cooling and heat recovery system and the internal cooling oil system are in communication connection with the controller.

[0010] In an embodiment, the high-temperature steam heat pump system further comprises a fourth heat pump connecting pipe, a heat pump flash evaporator, a fifth heat pump connecting pipe and a sixth heat pump connecting pipe, the fourth heat pump connecting pipe connects the heat pump condenser evaporator and the heat pump flash evaporator, the fifth heat pump connecting pipe connects the heat pump flash evaporator and the heat pump compressor, and the sixth heat pump connecting pipe connects the heat pump flash evaporator and the heat pump evaporator.

[0011] In an embodiment, a one-way valve is arranged on the second heat pump connecting pipe.

[0012] A first heat pump expansion valve is arranged on the third heat pump connecting pipe.

[0013] A second heat pump expansion valve is arranged on the fourth heat pump connecting pipe.

[0014] A third heat pump expansion valve is arranged on the sixth heat pump connecting pipe.

[0015] In an embodiment, the high-temperature steam heat pump system further comprises a heat pump sewage pipe and a heat pump sewage valve, the heat pump sewage pipe is connected with the heat pump condenser evaporator, and the heat pump sewage valve is arranged on the heat pump sewage pipe.

[0016] In an embodiment, the high-temperature steam heat pump external intelligent cooling and heat recovery system further comprises an external medium water system, the external medium water system comprises a first pipe, a purifier, a second pipe, a heat preservation water tank and a third pipe connected in sequence, and the heat preservation water tank is used for providing medium water for the cooling and heat recovery system.

[0017] In an embodiment, a water tank liquid level meter is arranged in the heat preservation water tank, an electric control drainage valve is arranged on the third pipe, and the water tank liquid level meter and the electric control drainage valve are both in communication connection with the controller.

[0018] In an embodiment, the cooling and heat recovery system comprises the first heat exchanger, the heat pump condenser evaporator, a heat preservation water tank, a fourth pipe, a first electric control three-way flow regulating valve, a fifth pipe, a first oil cooler, a sixth pipe, a seventh pipe, a second oil cooler, an eighth pipe, a ninth pipe, a second electric control three-way flow regulating valve, a tenth pipe, an eleventh pipe, a twelfth pipe and a steam pipe.

[0019] The fourth pipeline is connected with the heat preservation water tank and the first electrically controlled three-way flow regulating valve, the fifth pipeline is connected with the first electrically controlled three-way flow regulating valve and the first oil cooler, the sixth pipeline is connected with the first oil cooler and the ninth pipeline, the seventh pipeline is connected with the first electrically controlled three-way flow regulating valve and the second oil cooler, the eighth pipeline is connected with the second oil cooler and the ninth pipeline, the ninth pipeline is connected with the second electrically controlled three-way flow regulating valve, the tenth pipeline is connected with the second electrically controlled three-way flow regulating valve and the heat preservation water tank, the eleventh pipeline is connected with the second electrically controlled three-way flow regulating valve and the first heat exchanger, the twelfth pipeline is connected with the first heat exchanger and the heat pump condenser evaporator, and the steam pipeline is arranged in the heat pump condenser evaporator.

[0020] The first electrically controlled three-way flow regulating valve and the second electrically controlled three-way flow regulating valve are both in communication connection with the controller.

[0021] In an embodiment, a circulating water pump is arranged on the fourth pipeline, a condenser evaporator liquid level meter is arranged in the heat pump condenser evaporator, and an electrically controlled flow regulating valve is arranged on the steam pipeline, and the condenser evaporator liquid level meter and the electrically controlled flow regulating valve are both in communication connection with the controller.

[0022] In an embodiment, the internal cooling oil system comprises the heat pump compressor, a heat pump motor, the heat pump condenser evaporator, an oil tank, a first oil cooler, a second oil cooler, an oil pump, a first oil pipeline, a second oil pipeline, a third oil pipeline, a fourth oil pipeline and a fifth oil pipeline.

[0023] The first oil pipeline is connected with the oil tank and the first oil cooler, the oil pump is arranged on the first oil pipeline, the second oil pipeline is connected with the first oil cooler and the heat pump compressor, the heat pump compressor is connected with the heat pump motor, the third oil pipeline is connected with the heat pump condenser evaporator and the second oil cooler, the fourth oil pipeline is connected with the second oil cooler and the heat pump motor, and the fifth oil pipeline is connected with the heat pump motor and the oil tank.

[0024] The application further provides a high-temperature steam heat pump external intelligent cooling and heat recovery control method, which is applied to the high-temperature steam heat pump external intelligent cooling and heat recovery system as described above, and the control method comprises the following steps:

[0025] Controlling the working medium of the high-temperature steam heat pump system to flow into the heat pump evaporator and the waste heat fluid heat exchanger of the waste heat system;

[0026] Controlling the working medium after heat exchange to flow into the heat pump compressor for compression;

[0027] Controlling the working medium after compression to flow into the heat pump condenser evaporator;

[0028] controlling the medium water of the cooling and heat recovery system to flow into the first heat exchanger and exchange heat with the waste heat fluid of the waste heat system;

[0029] controlling the medium water after heat exchange to flow into the heat pump condenser evaporator and exchange heat with the compressed working medium to generate steam.

[0030] In the technical scheme of the present application, the waste heat fluid of the waste heat system exchanges heat with the working medium of the heat pump evaporator and the high-temperature steam heat pump system, and then exchanges heat with the medium water of the cooling and heat recovery system in the first heat exchanger, thereby improving the utilization rate of the heat of the waste heat fluid. Moreover, the medium water of the cooling and heat recovery system absorbs the heat of the cooling oil of the internal cooling oil system before heat exchange, and the temperature of the medium water after heat exchange is relatively higher when flowing into the heat pump condenser evaporator, so that steam can be generated more easily. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0032] Figure 1 A structure schematic diagram of an embodiment of the high-temperature steam heat pump external intelligent cooling and heat recovery system provided by the present application;

[0033] Figure 2 A structure schematic diagram of an embodiment of the high-temperature steam heat pump system provided by the present application.

[0034] Explanation of reference numerals:

[0035] 11, waste heat water inlet pipe; 12, first waste heat water outlet pipe; 13, first heat exchanger; 14, second waste heat water outlet pipe; 21, heat pump evaporator; 22, first heat pump connecting pipe; 23, heat pump compressor; 24, heat pump motor; 25, one-way valve; 26, second heat pump connecting pipe; 27, heat pump condenser evaporator; 28, third heat pump connecting pipe; 29, first heat pump expansion valve; 30, second heat pump expansion valve; 31, fourth heat pump connecting pipe; 32, heat pump flash evaporator; 33, fifth heat pump connecting pipe; 34, sixth heat pump connecting pipe; 35, third heat pump expansion valve; 36, heat pump sewage pipe; 37, heat pump sewage valve; 41, first pipe; 42, purifier; 43, second pipe; 44, heat preservation water tank; 45, electric control drainage valve; 46, third pipe; 47, water tank liquid level meter; 51, fourth pipe; 52, circulating water pump; 53, first electric control three-way flow regulating valve; 54, fifth pipe; 55, first oil cooler; 56, sixth pipe; 57, seventh pipe; 58, second oil cooler; 59, eighth pipe; 60, ninth pipe; 61, second electric control three-way flow regulating valve; 62, tenth pipe; 63, eleventh pipe; 64, twelfth pipe; 65, steam pipe; 66, electric control flow regulating valve; 67, condenser evaporator liquid level meter; 70, oil tank; 71, oil pump; 72, first oil pipe; 73, second oil pipe; 74, third oil pipe; 75, fourth oil pipe; 76, fifth oil pipe; 80, controller.

[0036] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0039] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0040] The present application provides a high-temperature steam heat pump external intelligent cooling and heat recovery system.

[0041] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, the high-temperature steam heat pump external intelligent cooling and heat recovery system comprises a waste heat system, a high-temperature steam heat pump system, a cooling and heat recovery system, an internal cooling oil system and a controller 80; the waste heat system comprises a waste heat inlet pipe 11, a heat pump evaporator 21, a first waste heat outlet pipe 12, a first heat exchanger 13 and a second waste heat outlet pipe 14 connected in sequence; the high-temperature steam heat pump system comprises the heat pump evaporator 21, a first heat pump connecting pipe 22, a heat pump compressor 23, a second heat pump connecting pipe 26, a heat pump condenser 27 and a third heat pump connecting pipe 28 connected in sequence, the third heat pump connecting pipe 28 is connected with the heat pump evaporator 21, and the working medium of the high-temperature steam heat pump system exchanges heat with the waste heat fluid of the waste heat system through the heat pump evaporator 21; the internal cooling oil system is used for providing cooling oil for the high-temperature steam heat pump system; the cooling and heat recovery system is used for cooling the cooling oil of the internal cooling oil system, and the medium water of the cooling and heat recovery system is transmitted to the heat pump condenser 27 after exchanging heat with the waste heat fluid of the waste heat system through the first heat exchanger 13; the waste heat system, the high-temperature steam heat pump system, the cooling and heat recovery system and the internal cooling oil system are all in communication connection with the controller 80.

[0042] In the technical scheme of the present application, the waste heat fluid of the waste heat system exchanges heat with the working medium of the high-temperature steam heat pump system through the heat pump evaporator 21, and then exchanges heat with the medium water of the cooling and heat recovery system through the first heat exchanger 13, thereby improving the utilization rate of the heat of the waste heat fluid. And the medium water of the cooling and heat recovery system will absorb the heat of the cooling oil of the internal cooling oil system before heat exchange, and the temperature of the medium water after heat exchange is relatively higher when flowing into the heat pump condenser 27, so that steam can be generated more easily.

[0043] Further, in an embodiment of the present application, referring to Figure 2 The high-temperature steam heat pump system further comprises a fourth heat pump connecting pipe 31, a heat pump flash evaporator 32, a fifth heat pump connecting pipe 33 and a sixth heat pump connecting pipe 34. The fourth heat pump connecting pipe 31 connects the heat pump condenser evaporator 27 and the heat pump flash evaporator 32. The fifth heat pump connecting pipe 33 connects the heat pump flash evaporator 32 and the heat pump compressor 23. The sixth heat pump connecting pipe 34 connects the heat pump flash evaporator 32 and the heat pump evaporator 21.

[0044] Further, in an embodiment of the present application, referring to Figure 2 The second heat pump connecting pipe 26 is provided with a one-way valve 25. The third heat pump connecting pipe 28 is provided with a first heat pump expansion valve 29. The fourth heat pump connecting pipe 31 is provided with a second heat pump expansion valve 30. The sixth heat pump connecting pipe 34 is provided with a third heat pump expansion valve 35.

[0045] In order to ensure stable operation of the system, in an embodiment of the present application, referring to Figure 2 The high-temperature steam heat pump system further comprises a heat pump sewage pipe 36 and a heat pump sewage valve 37. The heat pump sewage pipe 36 is connected with the heat pump condenser evaporator 27. The heat pump sewage valve 37 is arranged in the heat pump sewage pipe 36. The heat pump sewage pipe 36 and the heat pump sewage valve 37 cooperate to remove dirt generated in the condensing process.

[0046] Further, in an embodiment of the present application, referring to Figure 1 The high-temperature steam heat pump external intelligent cooling and heat recovery system further comprises an external medium water system. The external medium water system comprises a first pipe 41, a purifier 42, a second pipe 43, a heat preservation water tank 44 and a third pipe 46 connected in sequence. The heat preservation water tank 44 is used to provide medium water for the cooling and heat recovery system. The heat preservation water tank 44 is provided with a water tank liquid level meter 47 and a temperature sensor. The third pipe 46 is provided with an electric control drain valve 45. The electric control drain valve 45, the water tank liquid level meter 47 and the temperature sensor are in communication connection with the controller 80.

[0047] Specifically, in an embodiment of the present application, referring to Figure 1The cooling and heat recovery system comprises a first heat exchanger 13, a heat pump condenser evaporator 27, a heat preservation water tank 44, a fourth pipeline 51, a first electrically controlled three-way flow regulating valve 53, a fifth pipeline 54, a first oil cooler 55, a sixth pipeline 56, a seventh pipeline 57, a second oil cooler 58, an eighth pipeline 59, a ninth pipeline 60, a second electrically controlled three-way flow regulating valve 61, a tenth pipeline 62, an eleventh pipeline 63, a twelfth pipeline 64 and a steam pipeline 65; the fourth pipeline 51 is connected with the heat preservation water tank 44 and the first electrically controlled three-way flow regulating valve 53, the fifth pipeline 54 is connected with the first electrically controlled three-way flow regulating valve 53 and the first oil cooler 55, the sixth pipeline 56 is connected with the first oil cooler 55 and the ninth pipeline 60, the seventh pipeline 57 is connected with the first electrically controlled three-way flow regulating valve 53 and the second oil cooler 58, the eighth pipeline 59 is connected with the second oil cooler 58 and the ninth pipeline 60, the ninth pipeline 60 is connected with the second electrically controlled three-way flow regulating valve 61, the tenth pipeline 62 is connected with the second electrically controlled three-way flow regulating valve 61 and the heat preservation water tank 44, the eleventh pipeline 63 is connected with the second electrically controlled three-way flow regulating valve 61 and the first heat exchanger 13, the twelfth pipeline 64 is connected with the first heat exchanger 13 and the heat pump condenser evaporator 27, and the steam pipeline 65 is arranged in the heat pump condenser evaporator 27; the first electrically controlled three-way flow regulating valve 53 and the second electrically controlled three-way flow regulating valve 61 are both in communication connection with the controller 80.

[0048] Further, in an embodiment of the present application, referring to Figure 1 , the fourth pipeline 51 is provided with a circulating water pump 52, the heat pump condenser evaporator 27 is provided with a condenser evaporator liquid level meter 67, and the steam pipeline 65 is provided with an electrically controlled flow regulating valve 66; the condenser evaporator liquid level meter 67 and the electrically controlled flow regulating valve 66 are both in communication connection with the controller 80.

[0049] Specifically, in an embodiment of the present application, referring to Figure 1 , the internal cooling oil system comprises a heat pump compressor 23, a heat pump motor 24, a heat pump condenser evaporator 27, an oil tank 70, a first oil cooler 55, a second oil cooler 58, an oil pump 71, a first oil pipeline 72, a second oil pipeline 73, a third oil pipeline 74, a fourth oil pipeline 75 and a fifth oil pipeline 76; the first oil pipeline 72 is connected with the oil tank 70 and the first oil cooler 55, the oil pump 71 is arranged in the first oil pipeline 72, the second oil pipeline 73 is connected with the first oil cooler 55 and the heat pump compressor 23, the heat pump compressor 23 is connected with the heat pump motor 24, the third oil pipeline 74 is connected with the heat pump condenser evaporator 27 and the second oil cooler 58, the fourth oil pipeline 75 is connected with the second oil cooler 58 and the heat pump motor 24, and the fifth oil pipeline 76 is connected with the heat pump motor 24 and the oil tank 70.

[0050] In order to detect the state of the medium in different systems in real time, in an embodiment of the present application, referring to Figure 1 and Figure 2The pressure sensor, the temperature sensor and the flow meter are arranged on the waste heat water inlet pipe 11, the temperature sensor is arranged on the first waste heat water outlet pipe 12, the temperature sensor is arranged on the second waste heat water outlet pipe 14, the pressure sensor, the temperature sensor and the flow meter are arranged on the fourth pipe 51, the flow meter is arranged on the fifth pipe 54, the temperature sensor is arranged on the sixth pipe 56, the flow meter is arranged on the seventh pipe 57, the temperature sensor is arranged on the eighth pipe 59, the temperature sensor and the flow meter are arranged on the eleventh pipe 63, the temperature sensor is arranged on the twelfth pipe 64, the pressure sensor, the temperature sensor and the flow meter are arranged on the steam pipe 65, the pressure sensor and the temperature sensor are arranged on the oil tank 70, the temperature sensor is arranged on the second oil pipe 73, the pressure sensor and the temperature sensor are arranged on the third oil pipe 74, and the pressure sensor and the temperature sensor are arranged on the fourth oil pipe 75.

[0051] When the waste heat system starts, the waste heat fluid enters the heat pump evaporator 21 through the waste heat water inlet pipe 11, and the temperature, pressure and flow rate are monitored in real time by the controller 80. The waste heat fluid transfers heat to the heat pump evaporator 21 of the high-temperature steam heat pump system, the heat pump evaporator 21 absorbs low-grade heat energy, and further recovers waste heat water energy through the first heat exchanger 13, while preheating the water supplement of the high-temperature steam heat pump system, thereby improving the overall heat energy utilization efficiency. To ensure the accuracy and stability of the recovery process, temperature sensors are arranged before and after the first heat exchanger 13 to monitor and feedback the waste heat water recovery temperature in real time, and the controller 80 dynamically adjusts according to the feedback data.

[0052] When the high-temperature steam heat pump system runs, the working medium exchanges heat with the waste heat system in the heat pump evaporator 21 and then enters the heat pump compressor 23 through the first heat pump connecting pipe 22, and is compressed in the heat pump compressor 23. The compressed high-temperature and high-pressure working medium is transported to the heat pump condenser 27 through the second heat pump connecting pipe 26 through the one-way valve 25, and exchanges heat in the heat pump condenser 27. During the condensation process, the working medium condenses and releases heat in the pipe, and the water outside the pipe absorbs heat and evaporates, finally generating high-temperature steam. The condensed liquid flows back in two ways: one way is that the condensed liquid flows back to the heat pump evaporator 21 through the third heat pump connecting pipe 28 through the first heat pump expansion valve 29, forming a closed cycle of the high-temperature steam heat pump, which is the main loop circulation; the other way is that the condensed liquid enters the heat pump flash evaporator 32 through the fourth heat pump connecting pipe 31 through the second heat pump expansion valve 30, and flashes in the heat pump flash evaporator 32. The flash gas generated by the heat pump flash evaporator 32 enters the heat pump compressor 23 through the fifth heat pump connecting pipe 33 to provide air supplement for the heat pump compressor 23; the liquid after flashing expands through the sixth heat pump connecting pipe 34 through the third heat pump expansion valve 35 and then flows back to the heat pump evaporator 21, forming a complete cycle.

[0053] When the external medium water system is running, tap water is transported to the purifier 42 through the first pipeline 41 for purification treatment, and then enters the second pipeline 43 and is stored in the heat preservation water tank 44. The heat preservation water tank 44 is equipped with a water tank liquid level meter 47 and a temperature sensor, which monitor the liquid level and temperature parameters in real time and transmit the monitoring signals to the controller 80. When the liquid level in the heat preservation water tank 44 exceeds the preset threshold, the controller 80 controls the opening of the electrically controlled drain valve 45 to automatically discharge the excess liquid, and at the same time, water is supplemented through the second pipeline 43; when the temperature exceeds the set range, the controller 80 also controls the opening of the electrically controlled drain valve 45 to discharge the high-temperature liquid, and at the same time, water is supplemented through the second pipeline 43, so as to maintain the dynamic balance of the liquid level and temperature in the heat preservation water tank 44, thereby ensuring the stable operation and efficient regulation and control of the medium water system.

[0054] When the cooling and heat recovery system is running, the low-temperature purified water provided by the external medium water system enters the circulating water pump 52 through the fourth pipeline 51 and is pressurized in the circulating water pump 52. The system monitors the temperature, flow rate and pressure of the pressurized medium water in real time during this process and transmits the monitoring data to the controller 80 to achieve intelligent regulation and control of fluid delivery parameters. The pressurized medium water is distributed and flow-regulated through the first electrically controlled three-way flow regulating valve 53 and enters two heat exchange paths: the first path enters the first oil cooler 55 through the fifth pipeline 54 to recover the waste heat of the cooling oil flowing from the oil tank 70 into the heat pump compressor 23 through the first oil pipe 72; the second path enters the second oil cooler 58 through the seventh pipeline 57 to recover the waste heat of the oil flowing from the heat pump condenser evaporator 27 into the heat pump motor 24 through the third oil pipe 74. To ensure the accuracy of flow control, flow meters are installed on the fifth pipeline 54 and the seventh pipeline 57, and the controller 80 dynamically adjusts the distribution ratio of the first electrically controlled three-way flow regulating valve 53 according to actual needs to match the flow requirements under different heat exchange conditions, ensuring the heat exchange effect. The medium water after heat exchange in the first oil cooler 55 and the second oil cooler 58 is discharged from the sixth pipeline 56 and the eighth pipeline 59, respectively, and temperature sensors are provided at the sixth pipeline 56 and the eighth pipeline 59 to detect the water temperature after heat exchange in real time, optimize the system heat exchange efficiency, and control the heat exchange fluid temperature. The discharged medium water converges through the ninth pipeline 60 to the second electrically controlled three-way flow regulating valve 61, and after passing through the second electrically controlled three-way flow regulating valve 61, it is divided into two parts: one part directly returns to the heat preservation water tank 44 to maintain the stability of the medium water circulation; the other part enters the first heat exchanger 13 for secondary heating to further raise the water temperature to close to the return water temperature of the waste heat water. After measuring the heated return water temperature, the system finally supplements it to the heat pump condenser evaporator 27, efficiently recovers waste heat through the controller 80, maximally reduces heat loss, improves energy secondary utilization and steam production, and realizes efficient recovery and utilization of energy. At the same time, the high-temperature steam generated in the heat pump condenser evaporator 27 flows through the electrically controlled flow regulating valve 66 and is discharged through the steam pipeline 65, and flow, temperature and pressure sensors are provided on the steam pipeline 65 to realize real-time monitoring and regulation of the exhaust parameters, so as to optimize the system performance and improve the overall energy efficiency. There is a condenser evaporator liquid level meter 67 in the heat pump condenser evaporator 27 to monitor the liquid level of the high-temperature water in the heat pump condenser evaporator 27 and transmit the monitoring signal to the controller 80 to ensure that the liquid level in the heat pump condenser evaporator 27 is within the set range.

[0055] When the internal cooling oil system is running, part of the oil remains inside the heat pump compressor 23 and the other part is brought into the heat pump condenser evaporator 27 due to the need for oil injection for lubrication and cooling during the operation of the heat pump compressor 23. Therefore, the cooling oil system can be divided into two parts to ensure the stable operation of the heat pump compressor 23 and the heat pump motor 24 respectively, while achieving efficient recovery of waste heat. The first part is the oil return cooling process of the heat pump condenser evaporator 27. The cooling oil in the heat pump condenser evaporator 27 first flows into the heat pump motor 24 through the third oil pipe 74, and the oil temperature and pressure are measured during this process to ensure the controllability of the operating parameters. Then, the cooling oil enters the first oil cooler 55 for the first time to reduce the temperature, and the temperature and pressure are measured again to evaluate the heat exchange effect. The cooled cooling oil flows into the heat pump motor 24 to cool the heat pump motor 24, and finally enters the oil tank 70 through the fifth oil pipe 76 to realize the cooling cycle. The second part is the oil supply cooling process of the oil tank 70. The cooling oil in the oil tank 70 is pressurized by the oil pump 71 and delivered to the heat pump compressor 23, and before entering the heat pump compressor 23, it is cooled by the first oil cooler 55 for the second time to further reduce the oil temperature and improve the cooling efficiency. The cooled oil finally also flows back to the oil tank 70 through the fifth oil pipe 76 to form a stable cooling cycle. Through the cooperative operation of the above two parts, the system effectively ensures the stable operation of the heat pump compressor 23 and the heat pump motor 24, and at the same time, through the heat exchange process of the first oil cooler 55 and the second oil cooler 58, the waste heat is efficiently recovered. The traditional oil cooling system usually relies on external primary cooling, resulting in a large amount of heat loss and the need for additional heat dissipation treatment. However, the system optimizes the heat recovery path of the cooling oil, so that the heat generated during the external cooling process is recovered as much as possible to the heat pump system for water preheating, thereby greatly improving the energy utilization efficiency, reducing energy consumption, increasing steam production, and enhancing the overall economic efficiency and sustainability of the system.

[0056] The controller 80 determines the operating state of each fluid according to the temperature, pressure and flow data measured by each sensor, and then accurately controls the flow and direction of the fluid by adjusting the valve to ensure that the system operates in the best working condition. In addition to the regulation between each subsystem, the controller 80 is also responsible for maintaining the balance of the entire system. When the controller 80 detects that the liquid level in the heat preservation water tank 44 exceeds the preset threshold, the controller 80 controls the opening of the electrically controlled drain valve 45 to automatically drain the excess liquid, and at the same time replenishes water through the second pipeline 43; when the temperature exceeds the set range, the controller 80 also controls the opening of the electrically controlled drain valve 45 to drain the high-temperature liquid, and at the same time replenishes water through the second pipeline 43, to maintain the dynamic balance of the liquid level and temperature in the heat preservation water tank 44, thereby ensuring the stable operation and efficient regulation of the cooling water system. When the controller 80 detects that the oil temperature from the heat pump condenser evaporator 27 through the second oil cooler 58 into the heat pump motor 24 is too high, the system will automatically adjust the first electrically controlled three-way flow regulating valve 53 in the cooling and heat recovery system to distribute more cooling water flow to the second oil cooler 58, increasing the heat exchange amount, thereby effectively reducing the oil temperature and avoiding overheating of the heat pump motor 24, protecting the safe and stable operation of the heat pump motor 24. When the controller 80 detects that the oil temperature from the oil tank 70 through the first oil pipe 72 into the heat pump compressor 23 is too high, the system will automatically adjust the first electrically controlled three-way flow regulating valve 53 in the cooling and heat recovery system to distribute more cooling water flow to the first oil cooler 55, increasing the heat exchange amount, thereby effectively reducing the oil temperature and avoiding overheating of the heat pump compressor 23, protecting the safe and stable operation of the heat pump compressor 23. In addition, the heat pump condenser evaporator 27 in the high-temperature steam heat pump system is also equipped with a condenser evaporator liquid level meter 67 to monitor the water level in real time. When the liquid level is detected to be lower than the set value, the controller 80 will automatically control the second electrically controlled three-way flow regulating valve 61 in the cooling and heat recovery system to distribute more flow through the twelfth pipeline 64 into the heat pump condenser evaporator 27 to supplement the water amount; when the liquid level is higher than the set value, the controller 80 will adjust the opening of the second electrically controlled three-way flow regulating valve 61 to appropriately reduce the water flow, to ensure that the liquid level remains within the ideal range.

[0057] The application also provides a high-temperature steam heat pump external intelligent cooling and heat recovery control method, which is applied to the high-temperature steam heat pump external intelligent cooling and heat recovery system, and the control method comprises the following steps:

[0058] controlling the working medium of the high-temperature steam heat pump system to flow into the heat pump evaporator 21 and the waste heat fluid of the waste heat system to exchange heat;

[0059] controlling the working medium after heat exchange to flow into the heat pump compressor 23 for compression;

[0060] controlling the working medium after compression to flow into the heat pump condenser evaporator 27;

[0061] The medium water of the cooling and heat recovery system flows into the first heat exchanger 13 to exchange heat with the waste heat fluid of the waste heat system;

[0062] The medium water after heat exchange flows into the heat pump condensing evaporator 27 to exchange heat with the working medium after compression to generate steam.

[0063] In the technical scheme of the present application, the waste heat fluid of the waste heat system exchanges heat with the working medium of the high-temperature steam heat pump system after heat exchange in the heat pump evaporator 21, and exchanges heat with the medium water of the cooling and heat recovery system in the first heat exchanger 13, thereby improving the utilization rate of the heat of the waste heat fluid. Moreover, the medium water of the cooling and heat recovery system absorbs the heat of the cooling oil of the internal cooling oil system before heat exchange, and the temperature of the medium water after heat exchange is relatively higher when flowing into the heat pump condensing evaporator 27, so that steam can be generated more easily.

[0064] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or direct / indirect application in other related technical fields within the technical concept of the present application, and the contents of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A high temperature steam heat pump external intelligent cooling and heat recovery system, characterized in that, It includes a waste heat system, a high-temperature steam heat pump system, a cooling and heat recovery system, an internal cooling oil system, and a controller; The waste heat system includes a waste heat inlet pipe, a heat pump evaporator, a first waste heat outlet pipe, a first heat exchanger, and a second waste heat outlet pipe connected in sequence. The high-temperature steam heat pump system includes a heat pump evaporator, a first heat pump connecting pipe, a heat pump compressor, a second heat pump connecting pipe, a heat pump condenser-evaporator, and a third heat pump connecting pipe connected in sequence. The third heat pump connecting pipe is connected to the heat pump evaporator. The working fluid of the high-temperature steam heat pump system exchanges heat with the waste heat fluid of the waste heat system through the heat pump evaporator. The internal cooling oil system is used to provide cooling oil for the high-temperature steam heat pump system; The cooling and heat recovery system is used to cool the cooling oil of the internal cooling oil system. The medium water of the cooling and heat recovery system is transferred to the heat pump condenser-evaporator after exchanging heat with the waste heat fluid of the waste heat system through the first heat exchanger. The waste heat system, the high-temperature steam heat pump system, the cooling and heat recovery system, and the internal cooling oil system are all communicatively connected to the controller.

2. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 1, wherein, The high-temperature steam heat pump system further includes a fourth heat pump connecting pipe, a heat pump flash evaporator, a fifth heat pump connecting pipe, and a sixth heat pump connecting pipe. The fourth heat pump connecting pipe connects the heat pump condenser-evaporator and the heat pump flash evaporator. The fifth heat pump connecting pipe connects the heat pump flash evaporator and the heat pump compressor. The sixth heat pump connecting pipe connects the heat pump flash evaporator and the heat pump evaporator.

3. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 2, wherein, A one-way valve is installed on the second heat pump connecting pipe; The third heat pump connecting pipe is equipped with a first heat pump expansion valve; The fourth heat pump connecting pipe is equipped with a second heat pump expansion valve; The sixth heat pump connecting pipe is equipped with a third heat pump expansion valve.

4. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 1, wherein, The high-temperature steam heat pump system also includes a heat pump wastewater pipe and a heat pump wastewater valve. The heat pump wastewater pipe is connected to the heat pump condenser-evaporator, and the heat pump wastewater valve is located on the heat pump wastewater pipe.

5. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 1, wherein, The high-temperature steam heat pump external intelligent cooling and heat recovery system also includes an external medium water system, which includes a first pipe, a purifier, a second pipe, an insulated water tank, and a third pipe connected in sequence. The insulated water tank is used to provide medium water for the cooling and heat recovery system.

6. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 5, wherein, The insulated water tank is equipped with a water tank level gauge, and the third pipe is equipped with an electrically controlled drain valve. Both the water tank level gauge and the electrically controlled drain valve are communicatively connected to the controller.

7. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 1, wherein, The cooling and heat recovery system includes the first heat exchanger, the heat pump condenser-evaporator, the insulated water tank, the fourth pipe, the first electrically controlled three-way flow regulating valve, the fifth pipe, the first oil cooler, the sixth pipe, the seventh pipe, the second oil cooler, the eighth pipe, the ninth pipe, the second electrically controlled three-way flow regulating valve, the tenth pipe, the eleventh pipe, the twelfth pipe, and the steam pipe. The fourth pipeline is connected with the heat preservation water tank and the first electrically controlled three-way flow regulating valve, the fifth pipeline is connected with the first electrically controlled three-way flow regulating valve and the first oil cooler, the sixth pipeline is connected with the first oil cooler and the ninth pipeline, the seventh pipeline is connected with the first electrically controlled three-way flow regulating valve and the second oil cooler, the eighth pipeline is connected with the second oil cooler and the ninth pipeline, the ninth pipeline is connected with the second electrically controlled three-way flow regulating valve, the tenth pipeline is connected with the second electrically controlled three-way flow regulating valve and the heat preservation water tank, the eleventh pipeline is connected with the second electrically controlled three-way flow regulating valve and the first heat exchanger, the twelfth pipeline is connected with the first heat exchanger and the heat pump condenser evaporator, and the steam pipeline is arranged in the heat pump condenser evaporator. The first electrically controlled three-way flow regulating valve and the second electrically controlled three-way flow regulating valve are in communication connection with the controller.

8. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 7, wherein, The fourth pipeline is provided with a circulating water pump, the heat pump condenser evaporator is provided with a condenser evaporator liquid level meter, the steam pipeline is provided with an electrically controlled flow regulating valve, and the condenser evaporator liquid level meter and the electrically controlled flow regulating valve are in communication connection with the controller.

9. The high temperature steam heat pump external intelligent cooling and heat recovery system of claim 1, wherein, The internal cooling oil system comprises the heat pump compressor, the heat pump motor, the heat pump condenser evaporator, the oil tank, the first oil cooler, the second oil cooler, the oil pump, the first oil pipeline, the second oil pipeline, the third oil pipeline, the fourth oil pipeline and the fifth oil pipeline. The first oil pipeline is connected with the oil tank and the first oil cooler, the oil pump is arranged in the first oil pipeline, the second oil pipeline is connected with the first oil cooler and the heat pump compressor, the heat pump compressor is connected with the heat pump motor, the third oil pipeline is connected with the heat pump condenser evaporator and the second oil cooler, the fourth oil pipeline is connected with the second oil cooler and the heat pump motor, and the fifth oil pipeline is connected with the heat pump motor and the oil tank.

10. A high-temperature steam heat pump external intelligent cooling and heat recovery control method applied to the high-temperature steam heat pump external intelligent cooling and heat recovery system of any one of claims 1 to 9, characterized in that, The control method comprises: controlling the working medium of the high-temperature steam heat pump system to flow into the heat pump evaporator and the waste heat fluid of the waste heat system for heat exchange; controlling the working medium after heat exchange to flow into the heat pump compressor for compression; controlling the working medium after compression to flow into the heat pump condenser evaporator; controlling the medium water of the cooling and heat recovery system to flow into the first heat exchanger and the waste heat fluid of the waste heat system for heat exchange; controlling the medium water after heat exchange to flow into the heat pump condenser evaporator and the working medium after compression for heat exchange to generate steam.

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