Energy-saving working medium cooling and waste heat utilization system for gas extraction pump and regulation method thereof

Abstract

An energy-saving working medium cooling and waste heat utilization system for a gas extraction pump and a regulation method thereof, wherein the energy-saving working medium circulates in the system, absorbs useless work of the gas extraction pump and converts it into heat energy of the energy-saving working medium, which is collected in a storage pool; the energy-saving working medium heat exchange system indirectly transfers the heat energy of the energy-saving working medium in the storage pool to a heat utilization system with a small temperature drop; high-grade heat energy generated by the heat utilization system is first stored in a heat storage water tank for utilization, and when the heat storage demand is met, a double-source heat pump cooler switches to a spray cooler to discharge the unusable heat energy to the atmosphere; the integrated control regulation system has functions of real-time monitoring, intelligent analysis and man-machine interaction, and can also adjust the system operation mode and parameters in real time according to the changes of the external working conditions of the system. The present application rapidly improves the quality of the waste heat of the energy-saving working medium of the gas extraction pump and effectively utilizes the waste heat, enhances the cooling effect and temperature control stability of the energy-saving working medium of the gas extraction pump, and plays an important role in improving the gas extraction amount and operation efficiency of the gas extraction pump.

Description

Technical Field

[0001] This invention relates to an energy-saving cooling system for a gas extraction pump, specifically an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump and its control method, belonging to the field of coal mine gas extraction technology. Background Technology

[0002] Gas extraction pumps are the power source for coal mine gas extraction systems. In my country's coal mining industry, most operating gas extraction pumps are medium to large-sized water ring vacuum pumps with shaft power ranging from 100 to 2000 kW. The annual electricity consumption of gas extraction pumps nationwide exceeds 20 billion kWh, resulting in significant energy waste due to their high consumption and low efficiency. Technicians in this field have creatively developed an energy-saving working fluid for gas extraction pumps, utilizing its unique viscoelasticity, rheological properties, and good lubricity to significantly reduce energy consumption.

[0003] The temperature of the energy-saving working fluid inside the gas extraction pump is a key factor affecting the pump's suction volume, negative pressure, and efficiency. The industry standard (JB / T 7255-94) stipulates that the standard inlet temperature for gas extraction pumps is 15℃, while the operating temperature of gas extraction pumps in coal mines is often above 40℃. The release of a large amount of wasted energy as heat is the main reason for the increased temperature of the energy-saving working fluid. Although new energy-saving technologies have improved pump operating efficiency, more than 55% of the shaft power is still lost through various pathways, with the energy carried away by the heating and vaporization of the energy-saving working fluid accounting for more than 90% of the wasted energy. Excessively high energy-saving working fluid temperatures will, on the one hand, increase the saturated vapor pressure of water (the solvent in the energy-saving working fluid), and the evaporation of water will increase the viscosity of the energy-saving working fluid. Simultaneously, water vapor entering the suction chamber will reduce the effective suction volume, leading to a decrease in system energy efficiency and operational stability. On the other hand, the energy-saving working fluid is more prone to decomposition under high-temperature conditions, resulting in increased operating costs for the energy-saving system. Currently, coal mine gas extraction pump systems primarily rely on cooling towers for cooling, which cannot meet the cooling requirements of energy-saving systems. Firstly, cooling towers utilize air cooling, and their effectiveness fluctuates significantly depending on the season and ambient temperature (day or night). Secondly, existing coal mine cooling towers are all open-type cooling systems, making the energy-saving working fluid susceptible to contamination and moisture (the solvent in the energy-saving working fluid) loss. Thirdly, the cooling towers directly dissipate a large amount of waste heat carried by the energy-saving working fluid into the atmosphere, resulting in substantial energy waste.

[0004] The stable operation of coal mine gas extraction systems is crucial to underground production safety. Ensuring the energy-saving cooling effect and stability of the gas extraction pump is paramount. Furthermore, in the current context of energy scarcity, the recovery and utilization of waste heat energy is also essential. Chinese utility model patents CN209254173U (published August 16, 2019) and CN213808096U (published July 27, 2021) both relate to gas extraction water ring vacuum pump cooling technology, but neither can control the inlet liquid temperature and pump body temperature within the standard range. Chinese invention patent CN112879940A, published on June 1, 2021, entitled "A System and Method for Comprehensive Utilization of Latent Heat Recovery from Low-Temperature Flue Gas," can utilize the latent heat of flue gas (such as heat below 60℃) to meet the requirements of deep energy saving in boilers. Chinese utility model patent CN205536060U, published on August 31, 2016, entitled "A System for Utilizing Low-Temperature Waste Heat in Thermal Power Plants," can realize waste heat utilization, which is beneficial to the promotion of low-temperature waste heat recovery and utilization projects in thermal power plants. Chinese utility model patent CN205536060U was published on January 15, 2021. One patent, CN212360184U, is a "Comprehensive Utilization System for Waste Heat from Air Compressors," which comprehensively utilizes waste heat from air compressors, thus contributing to energy conservation and emission reduction. Another patent, CN204923160U, published on December 30, 2015, is a "Waste Heat Heating System for Gas Extraction Pump Circulating Water," which replaces the cooling tower during winter operation and recovers and utilizes the waste heat from the pump's circulating water to produce high-quality 60°C hot water, meeting heating and equipment antifreeze requirements, saving energy, and protecting the environment. However, both of these patents involve waste heat utilization technology, which limits their practical application.

[0005] In summary, there are currently no relevant technologies or control methods for intelligent gas extraction pump energy-saving working fluid cooling and waste heat utilization systems to guide engineering practice. Summary of the Invention

[0006] The purpose of this invention is to provide a gas extraction pump energy-saving working fluid cooling and waste heat utilization system and its control method. It can stabilize the temperature of the energy-saving working fluid in the gas extraction pump within the standard range according to the operating conditions of the gas extraction pump, and at the same time, efficiently utilize the waste heat energy in the energy-saving working fluid. The system and method have high reliability and strong practicality.

[0007] To achieve the above objectives, the present invention provides an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump, comprising a gas extraction pump system, an energy-saving working fluid heat exchange system, a heat utilization system, and a comprehensive control and regulation system.

[0008] The gas extraction pump system includes a gas extraction pump, an energy-saving working fluid discharge pipeline, a high-temperature storage tank, a low-temperature storage tank, an overflow pipe, a submersible pump for the extraction pump inlet, and an energy-saving working fluid inlet pipeline. The submersible pump for the extraction pump inlet is installed inside the low-temperature storage tank. The submersible pump for the extraction pump inlet is connected to the energy-saving working fluid inlet of the gas extraction pump through the energy-saving working fluid inlet pipeline. The energy-saving working fluid discharge port of the gas extraction pump is connected to the high-temperature storage tank through the energy-saving working fluid discharge pipeline. An overflow pipe is installed at the top connection between the high-temperature storage tank and the low-temperature storage tank.

[0009] The energy-saving working fluid heat exchange system includes a viscoelastic energy-saving high-efficiency plate heat exchanger, a self-cleaning filter, a submersible pump, a pipeline pump, a hot-end inlet pipe, a hot-end outlet pipe, a cold-end inlet pipe, and a cold-end outlet pipe. The hot-end inlet of the viscoelastic energy-saving high-efficiency plate heat exchanger is connected to the submersible pump located inside a high-temperature storage tank via the hot-end inlet pipe. The hot-end outlet of the viscoelastic energy-saving high-efficiency plate heat exchanger is connected to a low-temperature storage tank via the hot-end outlet pipe. The self-cleaning filter... The filter is installed on the hot end inlet pipe and is located near the hot end inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger; the cold end inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger is connected to the evaporator outlet of the intelligent self-controlled dual-source heat pump of the energy-saving working fluid heat exchange system through the cold end inlet pipe; the cold end outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger is connected to the evaporator inlet of the intelligent self-controlled dual-source heat pump through the cold end outlet pipe; and the pipeline pump is installed on the cold end inlet pipe.

[0010] The heat utilization system also includes a hot water storage tank and a spray cooler. The outlet of the hot water storage tank is connected to the condenser inlet of the intelligent self-controlled dual-source heat pump through the hot water storage tank outlet pipe. A hot water storage tank water circulation pipeline pump is installed on the hot water storage tank outlet pipe. The inlet of the hot water storage tank is connected to the condenser outlet of the intelligent self-controlled dual-source heat pump through the hot water storage tank return pipe. The outlet at the lower end of the spray cooler is connected to several nozzles installed inside the spray cooler through the spray cooler spray water circulation pipeline. A spray cooler spray water circulation pipeline pump is installed on the spray cooler spray water circulation pipeline.

[0011] The integrated control and regulation system includes a control cabinet, a sensor group, an actuator group, and a monitoring host. The control cabinet consists of a signal conversion module, a data processing module, a data storage module, and a display module. The sensor group is used to collect the operating parameters of the energy-saving working fluid cooling and waste heat utilization system of the extraction pump. The actuators can adjust the system operating mode in real time according to the instructions of the monitoring host. The control cabinet is electrically connected to the sensor group and the actuator group through signal lines, and controls each actuator by sending control signals. The monitoring host can adjust the system operating mode and the working fluid flow of each pipeline in real time according to changes in the external operating conditions of the system.

[0012] The sensor group of this invention includes: a pump inlet temperature sensor, a pump outlet temperature sensor, a pump outlet flow rate sensor, a high-temperature storage tank level sensor, a high-temperature storage tank temperature sensor, a low-temperature storage tank level sensor, a low-temperature storage tank temperature sensor, a heat exchanger hot-end flow rate sensor, a heat exchanger hot-end inlet temperature sensor, a heat exchanger hot-end outlet temperature sensor, a filter differential pressure sensor, a heat exchanger hot-end differential pressure sensor, a heat exchanger cold-end flow rate sensor, a heat exchanger cold-end inlet temperature sensor, a heat exchanger cold-end outlet temperature sensor, a hot water storage tank level sensor, a hot water storage tank temperature sensor, a hot water storage tank circulating water flow rate sensor, a hot water storage tank outlet water temperature sensor, and a hot water storage tank return water sensor. Temperature sensors and spray cooler spray water flow sensors are included. Specifically, the pump inlet temperature sensor is installed on the energy-saving working fluid inlet pipe, near the energy-saving working fluid inlet of the gas pump; the pump outlet temperature sensor and pump outlet flow sensor are sequentially installed on the energy-saving working fluid outlet pipe, both near the energy-saving working fluid outlet of the gas pump; the high-temperature storage tank level sensor and high-temperature storage tank temperature sensor are both installed in the high-temperature storage tank, and the low-temperature storage tank level sensor and low-temperature storage tank temperature sensor are both installed in the low-temperature storage tank; the heat exchanger hot-end flow sensor and heat exchanger hot-end inlet temperature sensor are sequentially installed on the hot-end inlet pipe, with the hot-end inlet temperature sensor near the viscous fluid. Location of the liquid inlet of the high-efficiency plate heat exchanger with elastic energy-saving working fluid; The hot-end drain temperature sensor of the heat exchanger is installed on the hot-end drain pipe; The filter differential pressure sensor is installed at both ends of the self-cleaning filter; The hot-end differential pressure sensor of the heat exchanger is installed on the pipe between the hot-end liquid inlet and drain outlet of the viscoelastic energy-saving plate heat exchanger; The cold-end flow sensor and the cold-end drain temperature sensor of the heat exchanger are sequentially installed on the cold-end drain pipe; The cold-end inlet temperature sensor of the heat exchanger is installed on the cold-end inlet pipe; The hot water storage tank level sensor and the hot water storage tank temperature sensor are both installed in the hot water storage tank; The hot water storage tank circulating water flow sensor and the hot water storage tank outlet temperature sensor are sequentially installed on the hot water storage tank outlet pipe. The hot water storage tank return water temperature sensor is installed on the hot water storage tank return water pipe; the spray cooler spray water flow sensor is installed on the spray cooler spray water circulation pipe; the actuator group includes: a heat exchanger hot end electric regulating valve, a heat exchanger cold end electric regulating valve, a hot water storage tank electric regulating valve, and a spray cooler electric control valve. The heat exchanger hot end electric regulating valve is installed on the hot end inlet pipe; the heat exchanger cold end electric regulating valve is installed on the cold end inlet pipe; the hot water storage tank electric regulating valve is installed on the hot water storage tank outlet pipe; the spray cooler electric control valve is installed on the spray cooler spray water circulation pipe and is located between the spray cooler spray water circulation pump and the spray cooler spray water flow sensor.

[0013] The viscoelastic energy-saving working fluid high-efficiency plate heat exchanger of the present invention adopts a composite corrugated plate and asymmetric wide flow channel design, which is suitable for heat exchange of high viscosity energy-saving working fluid liquids, and has the characteristics of small size, high heat exchange efficiency and non-clogging.

[0014] The hot water storage tank of the present invention is equipped with a water replenishment pipeline, and the water in the insulated water tank of the hot water storage tank can be automatically replenished to keep the liquid level at a certain height.

[0015] The self-cleaning filter of the present invention is equipped with two units, one for use and one for backup. When the pressure difference between the inlet and outlet of the self-cleaning filter in use exceeds the set value, it is automatically switched to the backup self-cleaning filter through the electric regulating valve at the hot end of the heat exchanger, and self-cleaning is performed at the same time.

[0016] A method for regulating an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump specifically includes the following steps:

[0017] a. According to the system connection device of claim 2, when the device starts to run, the integrated control and regulation system is started, and the monitoring host first sets the maximum allowable inlet temperature value T1 of the gas extraction pump inlet, the target temperature value T2 of the water heating in the hot water storage tank, the maximum allowable pressure difference value P1 of the inlet and outlet of the self-cleaning filter, and the maximum allowable pressure difference value P2 of the inlet and outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger hot end.

[0018] b. The integrated control and regulation system automatically collects the operating power, inlet and outlet liquid parameters, suction and exhaust parameters of the gas extraction pump and the parameters of the high and low temperature storage tank, and accurately calculates the useless power of the gas extraction pump, the heat carried away by the circulating working fluid, and the cooling capacity required by the system according to the following formulas.

[0019] (1) Waste power P of gas extraction pump 无 The calculation formula is as follows:

[0020] P 无 =P 轴 -P 有

[0021] In the formula: P 无 This refers to unused power, measured in kW.

[0022] P 轴 Shaft power, unit: kW;

[0023] P 有 Useful power, in kW;

[0024] P 轴 =P 电机 ·η 电机 ·η 传动

[0025] In the formula: P 电机 Motor power, in kW;

[0026] η 电机 For motor efficiency;

[0027] η 传动 For transmission efficiency;

[0028]

[0029] In the formula: p 进 Intake pressure, unit MPa;

[0030] p 排 Exhaust pressure, in MPa;

[0031] v 气 Inhalation velocity, in meters (m). 3 / min;

[0032] (2) Formula for calculating the heat carried away by the circulating working fluid:

[0033]

[0034] In the formula: P 液 The heat removed by the working fluid is expressed in kW.

[0035] c represents the specific heat capacity of the working fluid, in J / kg·℃;

[0036] v 液 The working fluid flow rate is expressed in cubic meters (m³). 3 / h;

[0037] ρ is the density of the working fluid, in kg / m³ 3 ;

[0038] T 液出 The temperature of the working fluid outlet is expressed in °C.

[0039] T 液进 The inlet temperature of the working fluid is in °C.

[0040] (3) Formula for calculating the cooling capacity required by the system:

[0041] P 需冷 =k·(P 轴 -P 有-预测 )

[0042]

[0043] In the formula: P 需冷 Cooling requirements for gas extraction pumps, in kW;

[0044] k is the correction factor for heat carried away by the working fluid;

[0045] P有-预测 The unit is kW, which is used to predict the active power after cooling.

[0046] c. Calculate the number of compressors operating in the intelligent automatic dual-source heat pump based on the cooling capacity required for the gas extraction pump using the following formula.

[0047]

[0048] In the formula: n is the number of intelligent self-controlled dual-source heat pump compressors in operation, in units of units;

[0049] P 压 The average cooling power of a single compressor is expressed in kW / unit.

[0050] d. The monitoring host starts the energy-saving working fluid heat exchange system and the heat utilization system, adjusts the parameters of each system to the target value, and the electric regulating valve and flow sensor of the heat exchanger on the hot end liquid inlet pipe can intelligently adjust the circulating flow of the energy-saving working fluid in a fuzzy manner; the electric regulating valve and flow sensor of the heat exchanger on the cold end liquid inlet pipe can intelligently adjust the circulating flow of the intermediate heat exchange medium in a fuzzy manner; the electric regulating valve and circulating water flow sensor of the hot water storage tank on the hot water storage tank outlet pipe can intelligently adjust the circulating water flow in a fuzzy manner; the electric control valve and flow sensor of the spray cooler on the spray cooler spray water circulation pipe can intelligently adjust the spray water circulation flow in a fuzzy manner. After the adjustment is completed, the system operating parameters are monitored in real time and recorded.

[0051] e. The monitoring host determines whether the inlet temperature of the gas extraction pump is higher than the set maximum inlet temperature T1. If it is less than or equal to the set maximum inlet temperature T1, the host re-determines the temperature after 5 minutes. If it is higher than the set maximum inlet temperature T1, the host returns to step b to recalculate the cooling capacity P required for the gas extraction pump. 需冷 And so it goes.

[0052] The regulation process of an intelligent self-controlled dual-source heat pump is as follows:

[0053] The intelligent self-controlled dual-source heat pump dual-cooler initially uses the hot water storage tank side. The monitoring host monitors and compares the real-time water temperature T2′ in the hot water storage tank with the set target temperature value T2. If the temperature is higher than the set target temperature value T2, the intelligent self-controlled dual-source heat pump dual-cooler automatically switches from the hot water storage tank side to the spray cooler side, and re-judges after 10 minutes. If the real-time water temperature T2′ in the hot water storage tank is lower than the set target temperature value T2, the intelligent self-controlled dual-source heat pump dual-cooler automatically switches from the spray cooler side to the hot water storage tank side, and re-judges after 10 minutes; this process repeats.

[0054] The control process for a self-cleaning filter is as follows:

[0055] The system is equipped with two identical self-cleaning filters, one in operation and one on standby. The pipelines are connected in parallel and each filter is equipped with an electric regulating valve at the hot end of the heat exchanger, enabling automatic switching. The system checks whether the pressure difference P1′ between the inlet and outlet of the self-cleaning filter is higher than the set maximum pressure difference P1. If it is higher, the system automatically switches to the standby self-cleaning filter via the electric regulating valve at the hot end of the heat exchanger, and simultaneously performs self-cleaning on the standby filter. The system checks again after a 1-minute interval. If the pressure difference is lower than the set maximum pressure difference P1, the system checks again after a 1-minute interval, and so on.

[0056] The process for overhauling a high-efficiency plate heat exchanger using a viscoelastic, energy-saving working fluid is as follows:

[0057] Determine whether the pressure difference P2′ between the hot end inlet and outlet of the viscoelastic energy-saving plate heat exchanger is higher than the set maximum pressure difference P2. If it is higher than the set maximum pressure difference P2, an alarm signal is issued to prompt manual maintenance. After maintenance is completed, the determination is repeated. If it is lower than the set maximum pressure difference P2, the determination is repeated after 1 minute. This process is repeated.

[0058] Compared with existing technologies, the energy-saving working fluid heat exchange system and heat utilization system set up in this invention can absorb the useless work of the gas extraction pump and convert it into energy-saving working fluid heat energy, which is collected in a high-temperature storage tank. The energy-saving working fluid heat exchange system includes a viscoelastic energy-saving working fluid high-efficiency plate heat exchanger, a self-cleaning filter, a submersible pump, a pipeline pump, and inlet and outlet pipelines for the hot and cold ends of the heat exchanger. It can indirectly transfer the energy-saving working fluid heat energy in the high-temperature storage tank to the heat utilization system with a small temperature drop. The heat utilization system includes an intelligent self-controlled dual-source heat pump, a hot water storage tank, and a spray cooler. The high-grade heat energy generated by the intelligent self-controlled dual-source heat pump is first stored in the hot water storage tank for utilization. When the heat storage demand is met, the intelligent self-controlled dual-source heat pump cooler switches to the spray cooler to discharge the unusable heat energy into the atmosphere. The integrated control and regulation system includes a control cabinet, sensors, actuators, and a monitoring host. It has functions such as real-time monitoring, intelligent analysis, and human-machine interaction. At the same time, it can adjust the system operation mode and parameters in real time according to changes in the external operating conditions of the system. This invention employs the reverse Carnot cycle high-efficiency heat transfer principle to rapidly improve and effectively utilize the waste heat quality of the energy-saving working fluid in gas extraction pumps. This enhances the cooling effect and temperature control stability of the energy-saving working fluid in gas extraction pumps, plays an important role in improving the gas extraction volume and operating efficiency of gas extraction pumps, and is of great significance for achieving safe and efficient operation of gas extraction systems. It has a wide range of applications. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the energy-saving working fluid cooling and waste heat utilization system of the gas extraction pump of the present invention;

[0060] Figure 2This is a flowchart illustrating the application method of the gas extraction pump energy-saving working fluid cooling and waste heat utilization system of the present invention.

[0061] In the diagram: 1. Gas extraction pump; 2. Energy-saving working fluid inlet pipeline; 3. Energy-saving working fluid outlet pipeline; 4. High-temperature storage tank; 5. Low-temperature storage tank; 6. Overflow pipe; 7. Submersible pump for gas extraction pump inlet; 8. Submersible pump; 9. Hot-end inlet pipeline; 10. Self-cleaning filter; 11. Viscoelastic energy-saving working fluid high-efficiency plate heat exchanger; 12. Hot-end outlet pipeline; 13. Pipeline pump; 14. Cold-end inlet pipeline; 15. Cold-end outlet pipeline; 16. Intelligent automatic dual-source pump. 17. Heat pump, 18. Hot water storage tank, 19. Spray cooler, 20. Pump inlet temperature sensor, 21. Pump outlet temperature sensor, 22. Pump outlet flow sensor, 23. High-temperature storage tank level sensor, 24. High-temperature storage tank temperature sensor, 25. Low-temperature storage tank level sensor, 26. Low-temperature storage tank temperature sensor, 27. Heat exchanger hot end flow sensor, 28. Heat exchanger hot end inlet temperature sensor, 29. Filter differential pressure. Sensors: 29. Electric regulating valve at the hot end of the heat exchanger; 30. Heat exchanger hot end drain temperature sensor; 31. Heat exchanger hot end differential pressure sensor; 32. Heat exchanger cold end inlet temperature sensor; 33. Heat exchanger cold end electric regulating valve; 34. Heat exchanger cold end flow sensor; 35. Heat exchanger cold end drain temperature sensor; 36. Hot water storage tank level sensor; 37. Hot water storage tank temperature sensor; 38. Hot water storage tank water circulation pipeline pump; 39. Hot water storage tank... 40. Hot water storage tank outlet pipe; 41. Hot water storage tank return pipe; 42. Hot water storage tank electric regulating valve; 43. Hot water storage tank circulating water flow sensor; 44. Hot water storage tank outlet temperature sensor; 45. Hot water storage tank return water temperature sensor; 46. Spray cooler spray water circulation pipeline pump; 47. Spray cooler spray water circulation pipeline; 48. Spray cooler fan frequency converter motor; 49. Spray cooler electrically controlled valve; 40. Spray cooler spray water flow sensor. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0063] like Figure 1 As shown, this example provides an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump, including a gas extraction pump system, an energy-saving working fluid heat exchange system, a heat utilization system, and a comprehensive control and regulation system.

[0064] The gas extraction pump system includes a gas extraction pump 1, an energy-saving working fluid discharge pipeline 3, a high-temperature storage tank 4, a low-temperature storage tank 5, an overflow pipe 6, a submersible pump 7 for inlet of the extraction pump, and an energy-saving working fluid inlet pipeline 2. The submersible pump 7 for inlet of the extraction pump is installed inside the low-temperature storage tank 5. The submersible pump 7 for inlet of the extraction pump is connected to the energy-saving working fluid inlet of the gas extraction pump 1 through the energy-saving working fluid inlet pipeline 2. The submersible pump 7 for inlet of the extraction pump is used to discharge the energy-saving working fluid from the low-temperature storage tank 5. The working medium is pumped into the gas extraction pump 1. The energy-saving working medium discharge port of the gas extraction pump 1 is connected to the high-temperature storage tank 4 through the energy-saving working medium discharge pipeline 3. The energy-saving working medium of the gas extraction pump 1 is discharged into the high-temperature storage tank 4 through the discharge port for use by the subsequent energy-saving working medium heat exchange system for heat exchange and temperature control and heat utilization system. An overflow pipe 6 is set at the top connection between the high-temperature storage tank 4 and the low-temperature storage tank 5 to balance the liquid levels of the low-temperature storage tank 5 and the high-temperature storage tank 4.

[0065] The inlet and outlet of the gas extraction pump 1 are connected to the energy-saving working medium inlet pipeline 2 and the energy-saving working medium outlet pipeline 3, respectively, for the circulation of the energy-saving working medium. On the one hand, the energy-saving working medium completes the intake and exhaust under the impeller drive of the gas extraction pump. On the other hand, it absorbs the waste work of the gas extraction pump and converts it into the heat energy of the energy-saving working medium, which is carried out of the pump body and collected in the high-temperature storage tank 4. The stability of the inlet liquid level temperature and operating temperature of the gas extraction pump 1 can be ensured by intelligent temperature control and waste heat utilization of the energy-saving working medium in the high-temperature storage tank 4 and the low-temperature storage tank 5.

[0066] The energy-saving working fluid heat exchange system includes a viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11, a self-cleaning filter 10, a submersible pump 8, a pipeline pump 13, a hot-end inlet pipe 9, a hot-end outlet pipe 12, a cold-end inlet pipe 14, and a cold-end outlet pipe 15. The viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11 adopts a composite corrugated plate and asymmetric wide flow channel design, which can efficiently exchange heat with the viscoelastic energy-saving working fluid and effectively suppress heat exchanger blockage. The hot-end inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11 is connected to the submersible pump 8 installed inside the high-temperature storage tank 4 through the hot-end inlet pipe 9, and the hot-end outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11 is connected to the low-temperature storage tank 5 through the hot-end outlet pipe 12 for circulating the energy-saving working fluid in the high- and low-temperature storage tanks. The self-cleaning filter 10 is installed on the hot-end inlet pipe 9 and is located close to the viscoelastic energy-saving working fluid. The position of the hot end inlet of the high-efficiency plate heat exchanger 11 can remove impurities such as coal powder from the energy-saving working medium, and can perform blockage monitoring and self-cleaning. The self-cleaning filter 10 of this invention is equipped with two units, one for use and one for backup. When the pressure difference between the inlet and outlet of the self-cleaning filter 10 in use exceeds the set value, it will automatically switch to the backup self-cleaning filter 10 through the electric regulating valve and perform self-cleaning at the same time, so that self-cleaning can be achieved without stopping the operation. The cold end inlet of the viscoelastic energy-saving high-efficiency plate heat exchanger 11 is connected to the outlet of the intelligent self-controlled dual-source heat pump 16 of the energy-saving working medium heat exchange system through the cold end inlet pipe 14. The cold end outlet of the viscoelastic energy-saving high-efficiency plate heat exchanger 11 is connected to the inlet of the intelligent self-controlled dual-source heat pump 16 through the cold end outlet pipe 15, which is used to circulate the intermediate heat exchange medium and indirectly transfer the heat energy of the energy-saving working medium to the heat utilization system. The pipeline pump 13 is installed on the cold end inlet pipe 14.

[0067] The hot end and cold end of the energy-saving working fluid heat exchange system are respectively connected to the high-temperature liquid storage tank 4, the low-temperature liquid storage tank 5 and the intelligent self-controlled dual-source heat pump 16. The heat energy of the gas extraction pump system can be indirectly transferred to the intelligent self-controlled dual-source heat pump 16 of the heat utilization system, preventing problems such as low heat exchange efficiency of the energy-saving working fluid and heat pump blockage caused by direct heat exchange.

[0068] The heat utilization system also includes a hot water storage tank 17 and a spray cooler 18. The outlet of the hot water storage tank 17 is connected to the inlet of the intelligent self-controlled dual-source heat pump 16 through the hot water storage tank outlet pipe 39, and a hot water storage tank water circulation pipeline pump 38 is installed on the hot water storage tank outlet pipe 39. The inlet of the hot water storage tank 17 is connected to the outlet of the intelligent self-controlled dual-source heat pump 16 through the hot water storage tank return pipe 40. The outlet at the lower end of the spray cooler 18 is connected to several nozzles set inside the spray cooler 18 through the spray cooler spray water circulation pipeline 46, and a spray cooler spray water circulation pipeline pump 45 is installed on the spray cooler spray water circulation pipeline 46.

[0069] The evaporator of the intelligent self-controlled dual-source heat pump 16 is connected to the preceding energy-saving working fluid heat exchange system to absorb heat energy. The condenser of the intelligent self-controlled dual-source heat pump 16 is connected to the hot water storage tank 17 and the spray cooler 18 respectively. It can convert the waste heat of the gas extraction pump 1 into high-grade heat energy and store it in the hot water storage tank 17 for use. When the heat storage demand is met, the condenser of the intelligent self-controlled dual-source heat pump 16 switches to the spray cooler 18 to discharge the unusable heat energy to the atmosphere through fan heat dissipation, so as to ensure the stability of the temperature of the energy-saving working fluid in the high and low liquid storage tanks. The intelligent self-controlled dual-source heat pump 16 is electrically driven and effectively absorbs the heat energy that the gas extraction pump cannot convert through the heat transfer working fluid to generate usable high-grade heat energy. The collected heat is then released into the water to reheat the water.

[0070] The intelligent self-controlled dual-source heat pump 16 is based on the reverse Carnot cycle theory. It drives the heat pump working fluid circulation through the work of the compressor, absorbs low-temperature heat energy in the evaporator, and releases high-temperature heat energy in the condenser.

[0071] The condenser of the intelligent self-controlled dual-source heat pump 16 is connected to the spray cooler 18 and the hot water storage tank 17 through pipelines. The two circulation pipelines are equipped with electrically controlled valves to adjust the connection status between the intelligent self-controlled dual-source heat pump 16 and the two. Water is used as the circulation medium inside the pipelines. The water pan at the bottom of the spray cooler 18 is filled with cooling water to spray and cool the coils, which can dissipate the high-temperature heat energy generated by the intelligent self-controlled dual-source heat pump 16 into the environment. The hot water storage tank 17 stores water. The high-temperature heat energy generated by the intelligent self-controlled dual-source heat pump 16 can be used to heat the water in the hot water storage tank 17, and the heat energy is stored in the hot water storage tank 17 for utilization.

[0072] The integrated control and regulation system includes a control cabinet, a sensor group, an actuator group, and a monitoring host. The control cabinet consists of a signal conversion module, a data processing module, a data storage module, and a display module. The control cabinet can realize functions such as system parameter setting, intelligent analysis, and human-machine interaction. The sensor group is used to collect the operating parameters of the energy-saving working fluid cooling and waste heat utilization system of the extraction pump. The actuators can adjust the system operating mode in real time according to the instructions of the monitoring host. The control cabinet is electrically connected to the sensor group and the actuator group through signal lines, and controls each actuator by sending control signals. The monitoring host can adjust the system operating mode and the working fluid flow of each pipeline in real time according to changes in the external operating conditions of the system.

[0073] The sensor group includes: pump inlet temperature sensor 19, pump outlet temperature sensor 20, pump outlet flow rate sensor 21, high-temperature storage tank level sensor 22, high-temperature storage tank temperature sensor 23, low-temperature storage tank level sensor 24, low-temperature storage tank temperature sensor 25, heat exchanger hot end flow rate sensor 26, heat exchanger hot end inlet temperature sensor 27, heat exchanger hot end outlet temperature sensor 30, filter differential pressure sensor 28, heat exchanger hot end differential pressure sensor 31, heat exchanger cold end flow rate sensor 34, heat exchanger cold end inlet temperature sensor 32, heat exchanger cold end outlet temperature sensor 35, hot water storage tank level sensor 36, hot water storage tank temperature sensor 37, and heat storage... The system includes a water tank circulating water flow sensor 42, a hot water storage tank outlet water temperature sensor 43, a hot water storage tank return water temperature sensor 44, and a spray cooler spray water flow sensor 49. The extraction pump inlet temperature sensor 19 is installed on the energy-saving working fluid inlet pipeline 2, near the energy-saving working fluid inlet side of the gas extraction pump 1, and is used to monitor the inlet temperature of the extraction pump. The extraction pump outlet temperature sensor 20 and the extraction pump outlet flow sensor 21 are sequentially installed on the energy-saving working fluid outlet pipeline 3, both near the energy-saving working fluid outlet side of the gas extraction pump 1. The extraction pump outlet temperature sensor 20 is used to monitor the outlet temperature of the extraction pump, and the extraction pump outlet flow sensor 21 is used to monitor the outlet flow rate of the extraction pump. High-temperature liquid level sensor 22 and high-temperature liquid temperature sensor 23 are both installed in high-temperature liquid storage tank 4, and low-temperature liquid level sensor 24 and low-temperature liquid temperature sensor 25 are both installed in low-temperature liquid storage tank 5. High-temperature liquid level sensor 22 and high-temperature liquid temperature sensor 23 are used to monitor the liquid level and temperature of high-temperature liquid storage tank 4, respectively, and low-temperature liquid level sensor 24 and low-temperature liquid temperature sensor 25 are used to monitor the liquid level and temperature of low-temperature liquid storage tank 5, respectively. Heat exchanger hot-end flow sensor 26 and heat exchanger hot-end inlet liquid temperature sensor 27 are sequentially installed on the hot-end inlet pipe 9, with heat exchanger hot-end inlet liquid temperature sensor 27 located close to the viscoelastic energy-saving device. The inlet of the high-efficiency plate heat exchanger is located at the following positions: the hot-end flow sensor 26 and the hot-end inlet temperature sensor 27 are used to monitor the flow rate and temperature data of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11, respectively; the hot-end drain temperature sensor 30 is installed on the hot-end drain pipe 12 to monitor the temperature data of the drained liquid at the hot end of the heat exchanger; the filter differential pressure sensor 28 is installed at both ends of the self-cleaning filter 10 to monitor the differential pressure value of the self-cleaning filter 10; and the hot-end differential pressure sensor 31 is installed on the pipe between the hot-end inlet and outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11 to monitor the differential pressure value between the two ends of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11.A cold-end flow sensor 34 and a cold-end drain temperature sensor 35 are sequentially installed on the cold-end drain pipe 15 to monitor the drain flow rate and drain temperature data of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11, respectively. A cold-end inlet temperature sensor 32 is installed on the cold-end inlet pipe 14 to monitor the inlet temperature data of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11. A hot water storage tank level sensor 36 and a hot water storage tank temperature sensor 37 are both installed in the hot water storage tank 17, respectively. The following sensors are used to monitor the liquid level and internal water temperature of the hot water storage tank 17: a hot water storage tank circulating water flow sensor 42 and a hot water storage tank outlet water temperature sensor 43 are sequentially installed on the hot water storage tank outlet pipe 39 to monitor the hot water storage tank circulating water flow and outlet water temperature, respectively; a hot water storage tank return water temperature sensor 44 is installed on the hot water storage tank return water pipe 40 to monitor the hot water storage tank return water temperature; and a spray cooler spray water flow sensor 49 is installed on the spray cooler spray water circulation... On pipeline 46, the flow rate data of the spray cooler spray water is monitored; the operating parameters of the energy-saving working fluid cooling and waste heat utilization system of the extraction pump can be collected; the actuator group includes: heat exchanger hot end electric regulating valve 29, heat exchanger cold end electric regulating valve 33, hot water storage tank electric regulating valve 41, spray cooler electric control valve 48. The heat exchanger hot end electric regulating valve 29 is installed on the hot end inlet pipeline 9, between the self-cleaning filter 10 and the heat exchanger hot end flow sensor 26; the heat exchanger cold end electric regulating valve... Valve 33 is installed on the cold end inlet pipe 14 and is located between the pipeline pump 13 and the cold end inlet temperature sensor 32 of the heat exchanger; the electric regulating valve 41 of the hot water storage tank is installed on the hot water storage tank outlet pipe 39 and is located between the hot water storage tank water circulation pipeline pump 38 and the hot water storage tank circulating water flow sensor 42; the electric control valve 48 of the spray cooler is installed on the spray cooler spray water circulation pipeline 46 and is located between the spray cooler spray water circulation pipeline pump 45 and the spray cooler spray water flow sensor 49.

[0074] The monitoring host is connected to the aforementioned sensors (sensors include: pump inlet temperature sensor 19, pump outlet temperature sensor 20, pump outlet flow sensor 21, high-temperature storage tank level sensor 22, high-temperature storage tank temperature sensor 23, low-temperature storage tank level sensor 24, low-temperature storage tank temperature sensor 25, heat exchanger hot end flow sensor 26, heat exchanger hot end inlet temperature sensor 27, heat exchanger hot end outlet temperature sensor 30, filter differential pressure sensor 28, heat exchanger hot end differential pressure sensor 31, heat exchanger cold end flow sensor 34, heat exchanger cold end inlet temperature sensor 32, heat exchanger...). The system is electrically connected to the following components: cold end drain temperature sensor 35, hot water tank level sensor 36, hot water tank temperature sensor 37, hot water tank circulating water flow sensor 42, hot water tank outlet temperature sensor 43, hot water tank return water temperature sensor 44, spray cooler spray water flow sensor 49) and actuators (including heat exchanger hot end electric regulating valve 29, heat exchanger cold end electric regulating valve 33, hot water tank electric regulating valve 41, and spray cooler electric control valve 48). The monitoring host controls each actuator by sending control signals and can adjust the system operation mode and parameters in real time according to changes in the external operating conditions of the system.

[0075] The hot water storage tank 17 is equipped with a water replenishment pipeline, and the water in the insulated water tank of the hot water storage tank 17 can be automatically replenished to keep the liquid level at a certain height.

[0076] A method for regulating an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump specifically includes the following steps:

[0077] a. According to the system connection device of claim 2, when the device starts to run, the integrated control and regulation system is started. The monitoring host first sets the maximum allowable inlet temperature value T1 of the gas extraction pump 1, the target temperature value T2 of the water heating in the hot water storage tank 17, the maximum allowable pressure difference value P1 of the inlet and outlet of the self-cleaning filter 10, and the maximum allowable pressure difference value P2 of the inlet and outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger 11.

[0078] b. The control cabinet of the integrated control and regulation system automatically collects the operating power, inlet and outlet liquid parameters, suction and exhaust parameters and high and low temperature storage tank parameters of the gas extraction pump 1 (including the parameter data collected by the temperature sensor, flow sensor, liquid level sensor, etc. mentioned above), and accurately calculates the useless power of the gas extraction pump, the heat carried away by the circulating working fluid, and the cooling capacity required by the system according to the following formula.

[0079] (1) Waste power P of gas extraction pump 无 The calculation formula is as follows:

[0080] P 无 =P 轴 -P 有

[0081] In the formula: P 无 This refers to unused power, measured in kW.

[0082] P 轴 Shaft power, unit: kW;

[0083] P 有 Useful power, in kW;

[0084] P 轴 =P 电机 ·η 电机 ·η 传动

[0085] In the formula: P 电机 Motor power, unit: kW;

[0086] η 电机 For motor efficiency;

[0087] η 传动 For transmission efficiency;

[0088]

[0089] In the formula: p 进 Intake pressure, unit MPa;

[0090] p 排 Exhaust pressure, in MPa;

[0091] v 气 Inhalation velocity, in meters (m). 3 / min;

[0092] (2) Formula for calculating the heat carried away by the circulating working fluid:

[0093]

[0094] In the formula: P 液 The heat removed by the working fluid is expressed in kW.

[0095] c represents the specific heat capacity of the working fluid, in J / kg·℃;

[0096] v 液 The working fluid flow rate is expressed in cubic meters (m³). 3 / h;

[0097] ρ is the density of the working fluid, in kg / m³ 3 ;

[0098] T 液出 The temperature of the working fluid outlet is expressed in °C.

[0099] T 液进 The inlet temperature of the working fluid is in °C.

[0100] (3) Formula for calculating the cooling capacity required by the system:

[0101] P 需冷 =k·(P 轴 -P 有-预测 )

[0102]

[0103] In the formula: P 需冷 Cooling requirements for gas extraction pumps, in kW;

[0104] k is the correction factor for heat carried away by the working fluid;

[0105] P 有-预测 The unit is kW, which is used to predict the active power after cooling.

[0106] c. Calculate the number of compressors operating in the intelligent automatic dual-source heat pump 16 according to the cooling demand of the gas extraction pump system using the following formula.

[0107]

[0108] In the formula: n is the number of intelligent self-controlled dual-source heat pump compressors in operation, in units of units;

[0109] P 压 The average cooling power of a single compressor is expressed in kW / unit.

[0110] d. The monitoring host starts the energy-saving working fluid heat exchange system and the heat utilization system, adjusts the parameters of each system to the target value, and the electric regulating valve 29 and the hot end flow sensor 26 of the heat exchanger on the hot end liquid inlet pipe 9 can intelligently and fuzzily adjust the circulating flow of the energy-saving working fluid; the electric regulating valve 33 of the cold end liquid inlet pipe 14 and the cold end flow sensor 34 of the heat exchanger on the cold end liquid outlet pipe 15 can intelligently and fuzzily adjust the circulating flow of the intermediate heat exchange medium; the electric regulating valve 41 of the hot water storage tank and the circulating water flow sensor 42 of the hot water storage tank on the hot water outlet pipe 39 can intelligently and fuzzily adjust the circulating water flow; the electric control valve 48 of the spray cooler and the spray water flow sensor 49 of the spray cooler on the spray cooler spray water circulation pipe 46 can intelligently and fuzzily adjust the spray water circulation flow. After the adjustment is completed, the system operating parameters are monitored in real time and recorded.

[0111] e. The monitoring host determines whether the inlet temperature of the gas extraction pump is higher than the set maximum inlet temperature T1. If it is less than or equal to the set maximum inlet temperature T1, the host re-determines the temperature after 5 minutes. If it is higher than the set maximum inlet temperature T1, the host returns to step b to recalculate the cooling capacity P required for the gas extraction pump. 需冷 And so it goes;

[0112] The regulation process of the intelligent self-controlled dual-source heat pump 16 is as follows:

[0113] The intelligent self-controlled dual-source heat pump 16 initially uses the hot water storage tank 17 side for its dual cooler. The monitoring host monitors and compares the real-time water temperature T2′ in the hot water storage tank 17 with the set target temperature value T2. If the water temperature T2′ is higher than the set target temperature value T2, the intelligent self-controlled dual-source heat pump 16 automatically switches from the hot water storage tank 17 side to the spray cooler 18 side, and re-judges after 10 minutes. If the real-time water temperature T2′ in the hot water storage tank 17 is lower than the set target temperature value T2, the intelligent self-controlled dual-source heat pump 16 automatically switches from the spray cooler 18 side to the hot water storage tank 17 side, and re-judges after 10 minutes. This process repeats continuously.

[0114] The control process of the self-cleaning filter 10 is as follows:

[0115] The system is equipped with two identical self-cleaning filters 10, one in operation and one on standby. The pipelines are connected in parallel and each is equipped with an electric regulating valve 29 at the hot end of the heat exchanger, which can automatically switch between them. The system checks whether the pressure difference P1′ between the inlet and outlet of the self-cleaning filter 10 is higher than the set maximum pressure difference P1. If it is higher than the set maximum pressure difference P1, the system automatically switches to the standby self-cleaning filter 10 via the electric regulating valve 29 at the hot end of the heat exchanger, and the self-cleaning filter 10 performs self-cleaning. The system checks again after 1 minute. If the pressure difference is lower than the set maximum pressure difference P1, the system checks again after 1 minute. This process is repeated.

[0116] The procedure for overhauling a viscoelastic, energy-saving, high-efficiency plate heat exchanger using a viscoelastic working fluid is as follows:

[0117] Determine whether the pressure difference P2′ between the inlet and outlet of the viscoelastic energy-saving plate heat exchanger 11 is higher than the set maximum pressure difference P2 between the inlet and outlet of the hot end. If it is higher than the set maximum pressure difference P2, an alarm signal is issued to prompt manual maintenance. After maintenance is completed, the determination is repeated. If it is lower than the set maximum pressure difference P2 between the inlet and outlet of the hot end, the determination is repeated after 1 minute. This process is repeated.

[0118] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A gas extraction pump energy-saving working fluid cooling and waste heat utilization system, characterized in that, This includes a gas extraction pump system, an energy-saving working fluid heat exchange system, a heat utilization system, and a comprehensive control and regulation system. The gas extraction pump system includes a gas extraction pump (1), an energy-saving working fluid discharge pipeline (3), a high-temperature storage tank (4), a low-temperature storage tank (5), an overflow pipe (6), a submersible pump for pumping pump inlet (7), and an energy-saving working fluid inlet pipeline (2). The submersible pump for pumping pump inlet (7) is installed inside the low-temperature storage tank (5). The submersible pump for pumping pump inlet (7) is connected to the energy-saving working fluid inlet of the gas extraction pump (1) through the energy-saving working fluid inlet pipeline (2). The energy-saving working fluid discharge port of the gas extraction pump (1) is connected to the high-temperature storage tank (4) through the energy-saving working fluid discharge pipeline (3). An overflow pipe (6) is installed at the top connection between the high-temperature storage tank (4) and the low-temperature storage tank (5). The energy-saving working fluid heat exchange system includes a viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11), a self-cleaning filter (10), a submersible pump (8), a pipeline pump (13), a hot-end liquid inlet pipe (9), a hot-end liquid outlet pipe (12), a cold-end liquid inlet pipe (14), and a cold-end liquid outlet pipe (15). The hot-end liquid inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11) is connected to the submersible pump (8) installed inside the high-temperature liquid storage tank (4) through the hot-end liquid inlet pipe (9), and the hot-end liquid outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11) is connected to the low-temperature liquid storage tank (5) through the hot-end liquid outlet pipe (12). The self-cleaning filter (10) is installed on the hot end liquid inlet pipe (9) and is located near the hot end liquid inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11); the cold end liquid inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11) is connected to the evaporator outlet of the intelligent self-controlled dual-source heat pump (16) of the energy-saving working fluid heat exchange system through the cold end liquid inlet pipe (14); the cold end liquid outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11) is connected to the evaporator inlet of the intelligent self-controlled dual-source heat pump (16) through the cold end liquid outlet pipe (15); and the pipeline pump (13) is installed on the cold end liquid inlet pipe (14). The heat utilization system also includes a hot water storage tank (17) and a spray cooler (18). The outlet of the hot water storage tank (17) is connected to the condenser inlet of the intelligent self-controlled dual-source heat pump (16) through the hot water storage tank outlet pipe (39). A hot water storage tank water circulation pipeline pump (38) is installed on the hot water storage tank outlet pipe (39). The inlet of the hot water storage tank (17) is connected to the condenser outlet of the intelligent self-controlled dual-source heat pump (16) through the hot water storage tank return pipe (40). The outlet at the lower end of the spray cooler (18) is connected to several nozzles installed inside the spray cooler (18) through the spray cooler spray water circulation pipeline (46). A spray cooler spray water circulation pipeline pump (45) is installed on the spray cooler spray water circulation pipeline (46). The integrated control and regulation system includes a control cabinet, a sensor group, an actuator group, and a monitoring host. The control cabinet consists of a signal conversion module, a data processing module, a data storage module, and a display module. The sensor group is used to collect the operating parameters of the energy-saving working fluid cooling and waste heat utilization system of the extraction pump. The actuators can adjust the system operating mode in real time according to the instructions of the monitoring host. The control cabinet is electrically connected to the sensor group and the actuator group through signal lines, and controls each actuator by sending control signals. The monitoring host adjusts the system operating mode and the working fluid flow of each pipeline in real time according to changes in the external operating conditions of the system.

2. The energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 1, characterized in that, The sensor group includes: pump inlet temperature sensor (19), pump outlet temperature sensor (20), pump outlet flow sensor (21), high-temperature storage tank level sensor (22), high-temperature storage tank temperature sensor (23), low-temperature storage tank level sensor (24), low-temperature storage tank temperature sensor (25), heat exchanger hot end flow sensor (26), heat exchanger hot end inlet temperature sensor (27), heat exchanger hot end outlet temperature sensor (30), filter differential pressure sensor (28), heat exchanger hot end differential pressure sensor (31), heat exchanger cold end flow sensor (34), heat exchanger cold end inlet temperature sensor (32), heat exchanger cold end outlet temperature sensor (35), and hot water tank level sensor. Sensors (36), hot water storage tank temperature sensor (37), hot water storage tank circulating water flow sensor (42), hot water storage tank outlet water temperature sensor (43), hot water storage tank return water temperature sensor (44), and spray cooler spray water flow sensor (49) are provided. Among them, the pump inlet temperature sensor (19) is set on the energy-saving working medium inlet pipeline (2) and is close to the energy-saving working medium inlet side of the gas pump (1); the pump outlet temperature sensor (20) and the pump outlet flow sensor (21) are set on the energy-saving working medium outlet pipeline (3) in sequence and are both close to the energy-saving working medium outlet side of the gas pump (1); the high temperature storage tank level sensor (22) and the high temperature storage tank temperature sensor (23) are both set on the high temperature storage tank. In the liquid pool (4), the low-temperature liquid level sensor (24) and the low-temperature liquid temperature sensor (25) are both installed in the low-temperature liquid pool (5); the heat exchanger hot end flow sensor (26) and the heat exchanger hot end inlet temperature sensor (27) are sequentially installed on the hot end inlet pipe (9), and the heat exchanger hot end inlet temperature sensor (27) is close to the inlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger; the heat exchanger hot end drain temperature sensor (30) is installed on the hot end drain pipe (12); the filter differential pressure sensor (28) is installed at both ends of the self-cleaning filter (10); the heat exchanger hot end differential pressure sensor (31) is installed between the hot end inlet and outlet of the viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11). On the pipeline; the cold end flow sensor (34) and the cold end drain temperature sensor (35) of the heat exchanger are sequentially installed on the cold end drain pipeline (15); the cold end inlet temperature sensor (32) of the heat exchanger is installed on the cold end inlet pipeline (14); the water level sensor (36) and the water temperature sensor (37) of the hot water storage tank are both installed in the hot water storage tank (17); the circulating water flow sensor (42) and the outlet water temperature sensor (43) of the hot water storage tank are sequentially installed on the outlet water pipeline (39) of the hot water storage tank; the return water temperature sensor (44) of the hot water storage tank is installed on the return water pipeline (40) of the hot water storage tank; the spray water flow sensor (49) of the spray cooler is installed on the spray water circulation pipeline (46) of the spray cooler.The actuator assembly includes: a heat exchanger hot-end electric regulating valve (29), a heat exchanger cold-end electric regulating valve (33), a hot water storage tank electric regulating valve (41), and a spray cooler electric control valve (48). The heat exchanger hot-end electric regulating valve (29) is installed on the hot-end liquid inlet pipe (9); the heat exchanger cold-end electric regulating valve (33) is installed on the cold-end liquid inlet pipe (14); the hot water storage tank electric regulating valve (41) is installed on the hot water storage tank outlet pipe (39); and the spray cooler electric control valve (48) is installed on the spray cooler spray water circulation pipe (46) and is located between the spray cooler spray water circulation pipe pump (45) and the spray cooler spray water flow sensor (49).

3. The energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 2, characterized in that, The viscoelastic energy-saving working fluid high-efficiency plate heat exchanger (11) adopts a composite corrugated plate and asymmetric wide flow channel design.

4. The energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 2, characterized in that, The hot water storage tank (17) is equipped with a water replenishment pipeline, and the water in the insulated water tank of the hot water storage tank (17) is automatically replenished to keep the liquid level at a certain height.

5. A gas extraction pump energy-saving working fluid cooling and waste heat utilization system according to any one of claims 1 to 3, characterized in that, Two self-cleaning filters (10) are provided, one for use and one for backup. When the pressure difference between the inlet and outlet of the self-cleaning filter (10) in use exceeds the set value, it will automatically switch to the backup self-cleaning filter (10) through the electric regulating valve and perform self-cleaning at the same time.

6. A control method for an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 2, characterized in that, Specifically, the following steps are included: a. According to claim 2, when the system connection device starts running, the integrated control and regulation system is started, and the monitoring host first sets the maximum allowable inlet temperature value of the gas extraction pump (1) inlet. The target temperature value for heating water in the hot water storage tank (17) The maximum pressure difference between the inlet and outlet of the self-cleaning filter (10) is allowed. The maximum pressure difference between the inlet and outlet of the viscoelastic energy-saving plate heat exchanger (11) is allowed. ; b. The integrated control and regulation system automatically collects the operating power, inlet and outlet liquid parameters, suction and exhaust parameters and high and low temperature storage tank parameters of the gas extraction pump (1), and accurately calculates the gas extraction pump's useless power, the heat carried away by the circulating working fluid, and the system's cooling capacity according to the following formulas; (1) Wasted power of gas extraction pump The calculation formula is as follows: In the formula: This refers to unused power, measured in kW. Shaft power, unit: kW; Useful power, in kW; In the formula: Motor power, in kW; For motor efficiency; For transmission efficiency; In the formula: Intake pressure, unit MPa; Exhaust pressure, in MPa; Inhalation speed, unit ; (2) Formula for calculating the heat carried away by the circulating working fluid: In the formula: The heat removed by the working fluid is expressed in kW. The specific heat capacity of the working fluid is expressed in J / kg·℃. For working fluid flow rate, in units ; The density of the working fluid is expressed in units of... ; The temperature of the working fluid outlet is expressed in °C. The inlet temperature of the working fluid is in °C. (3) Formula for calculating the system's cooling capacity: , In the formula: Cooling requirements for gas extraction pumps, in kW; Correction factor for heat removal by the working fluid; The unit is kW, which is used to predict the active power after cooling. c. Calculate the number of compressors operating in the intelligent self-controlled dual-source heat pump (16) according to the cooling requirement of the gas extraction pump using the following formula. In the formula: The number of intelligent self-controlled dual-source heat pump compressors in operation, in units of one unit; The average cooling power of a single compressor is expressed in kW / unit. d. The monitoring host starts the energy-saving working fluid heat exchange system and the heat utilization system, adjusts the parameters of each system to the target value, and the heat exchanger hot end electric regulating valve (29) and heat exchanger hot end flow sensor (26) on the hot end liquid inlet pipe (9) can intelligently and fuzzily adjust the energy-saving working fluid circulation flow; the heat exchanger cold end electric regulating valve (33) on the cold end liquid inlet pipe (14) and the heat exchanger cold end flow sensor (34) on the cold end liquid outlet pipe (15) can intelligently and fuzzily adjust the intermediate heat exchange medium circulation flow; the hot water storage tank electric regulating valve (41) and hot water storage tank circulating water flow sensor (42) on the hot water storage tank outlet pipe (39) can intelligently and fuzzily adjust the circulating water flow; the spray cooler electric control valve (48) and spray cooler spray water flow sensor (49) on the spray cooler spray water circulation pipe (46) can intelligently and fuzzily adjust the spray water circulation flow. After the adjustment is completed, the system operating parameters are monitored in real time and recorded. e. The monitoring host determines whether the inlet temperature of the gas extraction pump is higher than the set maximum inlet temperature. If it is less than or equal to the set maximum inlet temperature value Reassess after a 5-minute interval; if the temperature is higher than the set maximum inlet temperature. Then return to step b and recalculate the cooling load required for the gas extraction pump. And so it goes.

7. The control method for an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 6, characterized in that, The control process of the intelligent self-controlled dual-source heat pump (16) is as follows: The intelligent self-controlled dual-source heat pump (16) initially uses one side of the hot water storage tank (17) with dual coolers. The monitoring host monitors and compares the real-time water temperature in the hot water storage tank (17). With the set target temperature value The value is higher than the set target temperature value. The intelligent self-controlled dual-source heat pump (16) automatically switches from the hot water storage tank (17) side to the spray cooler (18) side, and re-judges after 10 minutes; if the real-time water temperature in the hot water storage tank (17) is... Below the set target temperature value Then the intelligent self-controlled dual-source heat pump (16) dual cooler automatically switches from the spray cooler (18) side to the hot water storage tank (17) side, and re-judges after 10 minutes; and so on.

8. The control method for an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 6, characterized in that, The control process of the self-cleaning filter (10) is as follows: The system is equipped with two self-cleaning filters (10) of the same model, one in use and one on standby. The pipelines are connected in parallel and each is equipped with an electric regulating valve (29) at the hot end of the heat exchanger, which can automatically switch; the system judges the pressure difference between the inlet and outlet of the self-cleaning filter (10). Is it higher than the set maximum pressure difference between inlet and outlet? If it exceeds the set maximum pressure difference between inlet and outlet. If the operation is slow, the system will automatically switch to the standby self-cleaning filter (10) via the electric regulating valve (29) at the hot end of the heat exchanger. Simultaneously, the self-cleaning filter (10) will self-clean, and the system will re-evaluate after a 1-minute interval. If the pressure difference is lower than the set maximum inlet and outlet pressure difference... Reassess after 1 minute; repeat this process.

9. The control method for an energy-saving working fluid cooling and waste heat utilization system for a gas extraction pump according to claim 6, characterized in that, The process for overhauling a viscoelastic energy-saving high-efficiency plate heat exchanger (11) is as follows: Determining the pressure difference between the inlet and outlet of a viscoelastic energy-saving plate heat exchanger (11) with respect to the hot end Is it higher than the set maximum pressure difference between the inlet and outlet of the hot end? If it exceeds the set maximum pressure difference between the inlet and outlet of the hot end If the pressure drops below the set maximum pressure difference between the hot end inlet and outlet, an alarm signal will be issued, prompting manual maintenance. After maintenance is completed, the assessment will be re-evaluated. Reassess after 1 minute; repeat this process.

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