Cold and heat energy combined cycle system of magnetic suspension differential pressure generator

Abstract

The invention belongs to the technical field of differential pressure power generation application, and discloses a magnetic suspension differential pressure generator cold and heat energy combined circulation system which comprises a main pipe and a user pipeline, a pressure regulating device and a differential pressure power generation system are arranged between the main pipe and the user pipeline in parallel, and the differential pressure power generation system comprises a differential pressure power generation device. The gas inlet end of the differential pressure power generation device is connected with a first pipeline, the end, away from the differential pressure power generation device, of the first pipeline is connected with the main pipeline, the gas outlet end of the differential pressure power generation device is connected with a third pipeline, and the second heat exchanger is provided with a third inlet and a third outlet. By controlling the flow of the high-temperature gas and the low-temperature gas in the second heat exchanger, the gas-liquid two-phase medium is formed and introduced into the spiral heat exchange pipe in the generator, and by means of the phase change of the gas-liquid two-phase medium, the pressure difference power generation device is cooled through spiral heat exchange. And the heat exchange efficiency in the generator is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure difference power generation application, and discloses a magnetic levitation pressure difference generator cold and heat energy combined cycle system. Background Art

[0002] Natural gas is extracted from gas reservoirs to wellheads, collected at gas gathering stations, and then uniformly purified to become qualified commercial natural gas. In order to ensure that natural gas can overcome pipeline resistance and maintain a stable flow of gas during long-distance transportation, the source gas needs to be pressurized and heated, and then the pressure is adjusted and released through various levels of pressure regulating stations before finally reaching the user terminal.

[0003] In order to make full use of the pressure energy released during the natural gas transportation process, the technology of using turbine expander technology for pressure difference power generation has been rapidly developed and widely used in recent years. Among them, the magnetic levitation turbine expansion power generation system has a simple structure, does not require a lubrication system, has no mechanical friction loss, does not require startup preheating, can achieve rapid start and shutdown, and is more adaptable to large pressure differences and variable load conditions.

[0004] Chinese utility model patent application number 202323487285.X discloses a magnetic levitation natural gas pressure differential power generation system. Using an external circulation pipeline, the low-temperature, low-pressure natural gas at the generator outlet is introduced into the spiral heat exchange tube inside the generator for heat exchange. On the one hand, this system can remove the heat generated by the internal operation of the generator, preventing the internal temperature of the generator from being too high and affecting the power generation efficiency. On the other hand, it heats the low-temperature, low-pressure gas at the outlet, effectively preventing the natural gas temperature from being too low and condensing in the downstream pipeline.

[0005] However, in this system, heat exchange is completed only by the natural flow of low-temperature, low-pressure natural gas, and the effect of heat exchange cannot be accurately controlled. The internal temperature of the generator may be too high or the low-temperature gas at the outlet may not meet the heating requirements, resulting in poor use effect. Summary of the Invention

[0006] The main technical problem to be solved by the present invention is to provide a combined cold and heat energy cycle system for a magnetically levitated pressure difference generator. By controlling the flow rates of high-temperature and low-temperature gases, heat exchange is fully realized in the second heat exchanger, and the formed gas-liquid two-phase medium is introduced into the spiral heat exchange tube inside the generator. The phase change of the gas-liquid two-phase medium is utilized to improve the heat exchange efficiency inside the generator.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: A magnetic levitation pressure difference generator cold and heat energy combined cycle system includes a main pipeline and a user pipeline, a pressure regulating device and a pressure difference power generation system are arranged in parallel between the main pipeline and the user pipeline, the pressure difference power generation system includes a pressure difference power generation device, a gas inlet end of the pressure difference power generation device is connected to a first pipeline, an end of the first pipeline away from the pressure difference power generation device is connected to the main pipeline, a gas outlet end of the pressure difference power generation device is connected to a third pipeline, an end of the third pipeline away from the pressure difference power generation device is connected to a first heat exchanger, a second pipeline is connected between the first heat exchanger and the user pipeline, the pressure difference power generation system also includes a second heat exchanger, the second heat exchanger is provided with a third inlet and a third outlet, the third inlet is connected to the first pipeline, a spiral heat exchange tube is provided in the pressure difference power generation device, the third outlet is connected to the inlet of the spiral heat exchange tube, a gas-liquid two-phase medium is formed at the third outlet, and the pressure difference power generation device is cooled by the spiral heat exchange tube.

[0008] The following is a further optimization of the above technical solution by the present invention: The third pipeline is provided with a fifth valve for controlling the on-off of the gas outlet of the pressure difference power generation device and a sixth valve for preventing the backflow of gas in the third pipeline in sequence according to the direction of gas flow. The outlet of the spiral heat exchange tube is connected to the first branch pipe, and the seventh valve is provided on the first branch pipe. The end of the first branch pipe away from the spiral heat exchange tube is connected to the third pipeline from the rear end of the sixth valve.

[0009] Further optimization: A second detection component is provided on one end of the second pipeline close to the first heat exchanger, and the second detection component includes a second temperature sensor and a second pressure sensor. A fifth electric adjustment device is also provided at the second outlet of the first heat exchanger, and the fifth electric adjustment device is connected to the second temperature sensor signal.

[0010] Further optimization: the second heat exchanger is also provided with a fourth inlet and a fourth outlet, the fourth inlet is connected to the third pipeline from the front end of the sixth valve, and the fourth outlet is connected to the second pipeline from the front end of the second detection component.

[0011] Further optimization: a third electric regulating device is provided between the third inlet and the first pipeline for controlling the gas flow at the third inlet, and a fourth electric regulating device is connected to the front end of the fourth inlet for controlling the gas flow from the fourth inlet.

[0012] Further optimization: A first valve is provided on one end of the first pipeline close to the main pipeline, which is used to control the on and off of the first pipeline. The rear end of the first valve on the first pipeline is successively provided with a filtering device for filtering impurities in the gas, a flow meter for detecting the gas flow rate and a quick-cut-off valve for quickly cutting off the gas passage in case of a fault; a first electric adjustment device and a first detection component are provided on one end of the first pipeline close to the pressure difference power generation device, and the first detection component includes a first temperature sensor and a first pressure sensor, and the first pressure sensor and the first electric adjustment device are signal-connected.

[0013] Further optimization: the first heat exchanger is provided with a first inlet and a first outlet, the first inlet is connected to the third pipeline, and the first outlet is connected to the end of the second pipeline away from the user pipeline; the first heat exchanger is also provided with a second inlet and a second outlet, and the second inlet and the second outlet are connected to the external storage system of the heat exchange medium.

[0014] Further optimization: A fourth valve is connected to the first pipeline at a position between the pressure differential power generation device and the first detection component, which is used to control the on-off of the gas circuit at the gas inlet of the pressure differential power generation device; an eighth valve is connected between the fourth outlet and the second pipeline, which is used to control the on-off of the gas circuit between the fourth outlet and the second pipeline.

[0015] Further optimization: The rear end of the second detection component on the second pipeline is sequentially provided with a second electric adjustment device for emergency cutting off the second pipeline in a fault state and a second valve for controlling the on and off of the second pipeline.

[0016] Further optimization: a vent branch is provided between the second electric regulating device and the second valve, one end of the vent branch is connected to the second pipeline, and the other end is connected to the external disposal device. The middle part of the vent branch is connected to the second branch, and the second branch is away from one end of the vent branch. It is connected to the third pipeline from the front end of the fourth electric regulating device, and a safety valve is provided on the second branch.

[0017] The present invention adopts the above technical solution and has the following beneficial effects: The present invention sets up a pressure differential power generation system in parallel with the existing pressure regulating device on the natural gas transmission pipeline, making full use of the pressure energy released during the natural gas transmission process. It can simultaneously realize normal pressure regulation function and pressure differential power generation function, provide the needs of increasing production and expanding capacity for some renovation projects, lower investment cost and save more space, and is particularly suitable for scenarios with large demand changes.

[0018] The pressure difference power generation device of the present invention adopts a magnetic levitation turbine generator. Compared with traditional turbine power generation technology, it does not require a lubrication system, has a simpler structure, no mechanical friction loss, does not require startup preheating, can achieve rapid start and shutdown, and has stronger adaptability to large pressure differences and variable load conditions, providing a green, environmentally friendly, reliable, and easy to maintain and upgrade power generation system.

[0019] A second heat exchanger is provided in the pressure difference power generation system of the present invention. By introducing the high-temperature gas in the main pipeline and the low-temperature gas discharged from the outlet end of the power generation device into the second heat exchanger for heat exchange, it can not only prevent the low-temperature gas from condensing in the pipeline and causing subsequent pipeline blockage, but also cool the high-temperature gas and be used to cool the inside of the power generation device to maintain normal operation of the power generation device.

[0020] The present invention provides electric adjustment devices at the cold end and hot end inlets of the second radiator, respectively. By regulating the flow rate of the gas at the two inlets, a gas-liquid two-phase medium is formed at the hot end outlet. A large amount of heat is absorbed by utilizing the phase change of the medium, thereby improving the efficiency of heat absorption inside the power generation device and preventing the high temperature inside the power generation device from affecting the power generation efficiency and service life.

[0021] The pressure difference power generation system of the present invention is also provided with a first heat exchanger to assist in heating the low-temperature gas discharged from the gas outlet end of the power generation device to ensure that the temperature of the gas entering the subsequent pipeline meets the set requirements. At the same time, temperature and pressure detection devices are set on the main pipeline and user pipeline, and are linked with the flow regulation device for control to ensure the normal operation of the system.

[0022] The present invention will be further described below with reference to the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 2 is a system principle diagram of an embodiment of the present invention.

[0024] In the figure: 1. Main pipeline; 2. User pipeline; 3. Pressure regulating device; 4. Pressure differential power generation system; 5. Pressure differential power generation device; 501. Turbine expander; 502. Generator; 503. Spiral heat exchange tube; 6. Filter device; 7. Flow meter; 8. Quick shut-off valve; 9. First detection assembly; 901. First temperature sensor; 902. First pressure sensor; 10. First heat exchanger; 1001. First inlet; 1002. First outlet; 1003. Second inlet; 1004. Second outlet; 11. Second detection assembly; 1101. Second temperature sensor; 1102. Second pressure sensor; 12. Second heat exchanger; 1 201. Third inlet; 1202. Third outlet; 1203. Fourth inlet; 1204. Fourth outlet; 13. Safety valve; 14. First pipeline; 15. Second pipeline; 16. Third pipeline; 17. First branch pipe; 18. Second branch pipe; 19. Vent branch pipe; 20. First valve; 21. Second valve; 22. Third valve; 23. Fourth valve; 24. Fifth valve; 25. Sixth valve; 26. Seventh valve; 27. Eighth valve; 28. First electric regulating device; 29. ​​Second electric regulating device; 30. Third electric regulating device; 31. Fourth electric regulating device; 32. Fifth electric regulating device. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, a magnetic levitation pressure difference generator cold and heat energy combined cycle system includes a main pipeline 1 and a user pipeline 2. A pressure regulating device 3 is connected between the main pipeline 1 and the user pipeline 2. To ensure that natural gas can overcome pipeline resistance and flow stably during long-distance transportation, the natural gas in the main pipeline 1 is in a high-temperature and high-pressure state. The gas is reduced in pressure by the pressure regulating device 3 to release pressure energy, and then transported to the user pipeline 2 for user use.

[0026] In order to make full use of the pressure energy released during the natural gas transportation process and improve the capacity of the pressure regulating station, a pressure difference power generation system 4 is also installed between the main pipeline 1 and the user pipeline 2. The pressure difference power generation system 4 is arranged in parallel with the pressure regulating device 3, which can realize normal pressure regulation function and pressure difference power generation function at the same time, providing the needs of increasing production and expanding capacity for some transformation projects, with lower investment cost and less floor space, and is particularly suitable for scenarios with large demand changes.

[0027] The pressure difference power generation system 4 includes a pressure difference power generation device 5. In this embodiment, the pressure difference power generation device 5 is a magnetic levitation turbine generator, which is formed by integrally connecting a turbine expander 501 and a generator 502. The gas inlet end of the pressure difference power generation device 5 is connected to a first pipeline 14. The end of the first pipeline 14 away from the pressure difference power generation device 5 is connected to the main pipeline 1. High-temperature and high-pressure natural gas enters the gas inlet of the pressure difference power generation device 5 from the main pipeline 1 through the first pipeline 14. The volume expands and the pressure decreases in the turbine expander 501. The internal energy of the gas is converted into mechanical energy, driving the generator 502 to generate electricity. During this process, the temperature of the natural gas drops sharply, and the low-temperature and low-pressure gas is discharged from the gas outlet of the pressure difference power generation device 5.

[0028] A first valve 20 is provided on one end of the first pipeline 14 close to the main pipeline 1. The first valve 20 is a manual stop valve used to control the on and off of the first pipeline 14. When the system needs to be repaired and debugged, or when an abnormal fault occurs in the system, workers manually close the first valve 20 to cut off the natural gas transmission path.

[0029] According to the direction of gas flow, the rear end of the first valve 20 on the first pipeline 14 is provided with a filter device 6, a flow meter 7 and a quick shut-off valve 8 in sequence. The filter device 6 is used to filter impurities in the natural gas to prevent impurities from entering subsequent equipment and causing equipment wear and blockage, thereby ensuring stable operation of the system; the flow meter 7 is used to monitor the flow of gas in the first pipeline 14 in real time, providing flow data for system operation, so that operators can understand the natural gas transportation situation; the quick shut-off valve 8 is a safety device, which is used to quickly and automatically close when the system is abnormal, cutting off the natural gas passage. The quick shut-off valve 8 can be linked with an external gas leak detection system, a fire alarm system, etc. to ensure the safety of the system and personnel.

[0030] In this embodiment, the first valve 20, the filter device 6, the flow meter 7 and the quick shut-off valve 8 are all mature products in the prior art and can be purchased on the market, so they will not be described in detail in this application.

[0031] A first electric regulating device 28 and a first detection component 9 are provided on one end of the first pipeline 14 near the pressure difference power generation device 5. The first detection component 9 includes a first temperature sensor 901 and a first pressure sensor 902, which are used to detect the temperature and pressure of the gas at the inlet of the pressure difference power generation device 5. The first pressure sensor 902 and the first electric regulating device 28 are connected through an external control system signal. When the pressure value of the gas in the first pipeline 14 fluctuates, the first pressure sensor 902 transmits a signal to the external control system. The external control system controls the action of the first electric regulating device 28 and adjusts the gas flow in the first pipeline 14 so that the gas pressure at the inlet of the pressure difference power generation device 5 tends to a stable value, thereby avoiding fluctuations in the output power of the generator 502 caused by pressure fluctuations.

[0032] In this embodiment, the first temperature sensor 901 and the first pressure sensor 902 are both mature products in the prior art and can be purchased on the market, and are not described in detail in this application.

[0033] In this embodiment, the first electric regulating device 28 is an electric valve, which drives the valve core to move through an electric actuator to change the cross-sectional area of ​​the valve flow, thereby controlling the flow rate of the gas in the pipeline.

[0034] In addition to this embodiment, the first electric regulating device 28 can also be a flow regulating device in the prior art, which changes the flow area of ​​the gas through an electric drive device to achieve the purpose of regulating the flow.

[0035] The gas outlet end of the pressure difference power generation device 5 is connected to a third pipeline 16, and the end of the third pipeline 16 away from the pressure difference power generation device 5 is connected to a first heat exchanger 10. A second pipeline 15 is connected between the first heat exchanger 10 and the user pipeline 2. The first heat exchanger 10 is used to heat and heat the low-temperature and low-pressure gas discharged from the gas outlet end of the pressure difference power generation device 5 so that the gas temperature reaches a set temperature value (generally 10°C) and enters the subsequent pipeline, which can effectively prevent the low-temperature and low-pressure gas from condensing and clogging in the pipeline, affecting the smooth flow of the pipeline.

[0036] The first heat exchanger 10 is provided with a first inlet 1001 and a first outlet 1002. The first inlet 1001 is connected to the third pipeline 16, and the first outlet 1002 is connected to the end of the second pipeline 15 away from the user pipeline 2. The low-temperature and low-pressure gas discharged from the gas outlet end of the pressure difference power generation device 5 enters the first heat exchanger 10 through the first inlet 1001, and is discharged from the first outlet 1002 after completing the heat exchange and enters the second pipeline 15.

[0037] A fifth valve 24 and a sixth valve 25 are sequentially provided on the third pipeline 16 according to the direction of gas flow. In this embodiment, the fifth valve 24 is a manual stop valve. When the system needs to be inspected and debugged or a system failure occurs, the fifth valve 24 is closed to cut off the passage of the gas outlet of the pressure differential power generation device 5. The sixth valve 25 is a check valve used to prevent the gas in the third pipeline 16 from flowing back, thereby avoiding the influence of gas pressure fluctuations in the pipeline on the pressure differential power generation device 5.

[0038] The first heat exchanger 10 is also provided with a second inlet 1003 and a second outlet 1004, which are connected to the external storage system of the heat exchange medium. The heat exchange medium with a higher temperature enters the first heat exchanger 10 through the second inlet 1003 to release heat, and heats the low-temperature gas entering the first inlet 1001. The heat exchange medium that completes the heat exchange is discharged from the second outlet 1004 and returns to the external storage system of the heat exchange medium.

[0039] In this embodiment, the heat exchange medium is water. During the heat exchange process, the gas entering the first inlet 1001 is heated while the heat exchange medium is cooled. Therefore, the external heat exchange medium storage system can be a cooling water system for various mechanical equipment, such as an engine cooling water system.

[0040] In addition to this embodiment, the heat exchange medium can also be selected as a liquid with good thermal conductivity such as oil or ethanol to heat the low-temperature and low-pressure gas discharged from the outlet of the pressure difference power generation device 5 to prevent the low-temperature gas from condensing and clogging in the pipeline.

[0041] A second detection component 11 is provided on one end of the second pipeline 15 close to the first heat exchanger 10. The second detection component 11 includes a second temperature sensor 1101 and a second pressure sensor 1102, which are respectively used to detect the temperature and pressure of the gas in the second pipeline 15. In order to ensure that the temperature of the gas entering the second pipeline 15 can reach the set value, a fifth electric adjustment device 32 is also provided at the second outlet 1004 of the first heat exchanger 10. The fifth electric adjustment device 32 is connected to the second temperature sensor 1101 through an external control system signal. When the second temperature sensor 1101 detects that the gas temperature in the second pipeline 15 is abnormal, the signal is transmitted to the external control system. The external control system controls the action of the fifth electric adjustment device 32 and adjusts the flow rate of the heat exchange medium at the second outlet 1004, thereby achieving the purpose of accurately controlling the gas temperature in the second pipeline 15.

[0042] In this embodiment, the second temperature sensor 1101 and the second pressure sensor 1102 are both mature products in the prior art and can be purchased on the market, and are not described in detail in this application.

[0043] In this embodiment, the fifth electric regulating device 32 has the same structure as the first electric regulating device 28 , and drives the valve core to move through the electric actuator to change the cross-sectional area of ​​the valve flow, thereby controlling the flow of the heat exchange medium at the second outlet 1004 .

[0044] A fourth valve 23 is also connected to the first pipeline 14 at a position between the pressure difference power generation device 5 and the first detection component 9. The fourth valve 23 has the same structure as the fifth valve 24 and is used to cut off the gas path when the system is under maintenance and debugging or when a system failure occurs. The fourth valve 23 and the fifth valve 24 need to be controlled to switch synchronously to protect the internal components of the pressure difference power generation device 5 from being damaged by high-temperature and high-pressure gas.

[0045] The pressure difference power generation system 4 also includes a second heat exchanger 12, which is provided with a third inlet 1201 and a third outlet 1202. A three-way connector is connected to the first pipeline 14 at a position located in front of the fourth valve 23, and the third inlet 1201 is connected to the first pipeline 14 through the three-way connector; a spiral heat exchange tube 503 is provided in the pressure difference power generation device 5, and the third outlet 1202 is connected to the inlet of the spiral heat exchange tube 503.

[0046] During operation, part of the high-temperature and high-pressure gas in the first pipeline 14 enters the second heat exchanger 12 from the third inlet 1201, completes heat exchange in the second heat exchanger 12, and generates a low-temperature and high-pressure gas-liquid two-phase medium. The gas-liquid two-phase medium is then discharged from the third outlet 1202 and enters the spiral heat exchange tube 503. The gas-liquid two-phase medium absorbs a large amount of heat by phase change, and the components inside the pressure difference power generation device 5 are efficiently cooled to avoid excessive internal temperature affecting the power generation efficiency and service life.

[0047] A third electric regulating device 30 is provided between the third inlet 1201 and the first pipeline 14. The external control system adjusts the opening of the third electric regulating device 30 by receiving the temperature signal inside the pressure difference power generation device 5 to control the gas flow entering the third inlet 1201. When the temperature inside the pressure difference power generation device 5 is too high, the opening of the third electric regulating device 30 is increased to allow more high-temperature and high-pressure gas to enter the third inlet 1201, and more gas-liquid two-phase medium is generated in the second heat exchanger 12 to take away more heat, so that the temperature inside the pressure difference power generation device 5 is maintained within the normal design range.

[0048] The outlet of the spiral heat exchange tube 503 is connected to the first branch pipe 17, and the seventh valve 26 is provided on the first branch pipe 17. The end of the first branch pipe 17 away from the spiral heat exchange tube 503 is connected to the third pipeline 16 from the rear end of the sixth valve 25, so that the gas is introduced into the pipeline away from the pressure difference power generation device 5, and the sixth valve 25 is used to prevent the gas from flowing back, thereby avoiding the gas pressure fluctuation from affecting the function of the pressure difference power generation device 5.

[0049] The seventh valve 26 is a manual stop valve that is in a normally open state. When the system needs to be repaired, the seventh valve 26 is manually closed to cut off the gas passage.

[0050] The second heat exchanger 12 is also provided with a fourth inlet 1203 and a fourth outlet 1204. The fourth inlet 1203 is connected to the third pipeline 16 from the front end of the sixth valve 25, and the fourth outlet 1204 is connected to the second pipeline 15 from the front end of the second detection component 11. A portion of the low-temperature and low-pressure gas at the outlet of the pressure difference power generation device 5 is introduced into the fourth inlet 1203, and after completing heat exchange in the second heat exchanger 12, it is discharged from the fourth outlet 1204 and enters the second pipeline 15.

[0051] The front end of the fourth inlet 1203 is connected to the fourth electric adjustment device 31. The control system receives the temperature information of the third outlet 1202, adjusts the opening of the fourth electric adjustment device 31, controls the gas flow entering the second heat exchanger 12 from the fourth inlet 1203, and accurately controls the formation of a gas-liquid two-phase medium at the third outlet 1202.

[0052] After the gas-liquid two-phase medium enters the spiral heat exchange tube 503, the liquid medium therein is heated and vaporized to absorb more heat, which is more effective than the solution in the prior art that uses a simple gas medium to absorb heat. It can ensure that all the heat generated inside the pressure difference power generation device 5 is absorbed, thereby maintaining the efficient operation of the pressure difference power generation device 5.

[0053] The structure and working principle of the third electric regulating device 30 and the fourth electric regulating device 31 are the same as those of the first electric regulating device 28, and are used to adjust the gas flow of the third inlet 1201 and the fourth inlet 1203 respectively, so as to ensure that the gas-liquid two-phase medium formed at the third outlet 1202 can fully meet the heat dissipation requirements inside the pressure difference power generation device 5.

[0054] An eighth valve 27 is connected between the fourth outlet 1204 and the second pipeline 15. The eighth valve 27 has the same structure as the fifth valve 24 and is used to cut off the gas path when the system is under maintenance or debugging or when a system failure occurs.

[0055] A second electric regulating device 29 and a second valve 21 are sequentially provided at the rear end of the second detection component 11 on the second pipeline 15. The second electric regulating device 29 has the same structure as the first electric regulating device 28. When a system failure occurs, the electric actuator drives the valve core to move, cutting off the gas path of the second pipeline 15 to ensure the safety of the entire system; the second valve 21 is a manual shut-off valve, which is used to control the on and off of the second pipeline 15. When the system needs to be inspected and debugged, or when an abnormal failure occurs in the system, workers manually close the second valve 21 to cut off the natural gas transmission path.

[0056] A vent branch pipe 19 is provided between the second electric regulating device 29 and the second valve 21. One end of the vent branch pipe 19 is connected to the second pipeline 15, and the other end is connected to the external disposal device. The middle part of the vent branch pipe 19 is connected to the second branch pipe 18 through a three-way connector. The second branch pipe 18 is away from one end of the vent branch pipe 19 and is connected to the third pipeline 16 from the front end of the fourth electric regulating device 31.

[0057] A safety valve 13 is provided on the second branch pipe 18. When a system failure occurs, the safety valve 13 opens, and the excess gas in the system pipeline is discharged into an external disposal device through the second branch pipe 18 and the vent branch pipe 19 to ensure the safety of the entire system.

[0058] The user pipeline 2 is also connected to a third valve 22, which is an insulating valve. By blocking the current conduction path in the pipeline, the third valve 22 prevents problems such as electrochemical corrosion, stray current interference and static electricity accumulation, thereby ensuring the safe operation of the pipeline system.

[0059] Bypass valves are also provided at the first electric regulating device 28, the second electric regulating device 29 and the safety valve 13. When the main valve needs to be repaired, replaced or has a sudden failure, the main valve is closed and the bypass valve is opened to allow the medium to bypass the main valve and continue to flow, thereby avoiding system shutdown and reducing transmission losses.

[0060] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A magnetic levitation pressure difference generator cold and heat energy combined cycle system, comprising a main pipeline (1) and a user pipeline (2), a pressure regulating device (3) and a pressure difference power generation system (4) are arranged in parallel between the main pipeline (1) and the user pipeline (2), the pressure difference power generation system (4) comprising a pressure difference power generation device (5), a gas inlet end of the pressure difference power generation device (5) is connected to a first pipeline (14), an end of the first pipeline (14) away from the pressure difference power generation device (5) is connected to the main pipeline (1), a gas outlet end of the pressure difference power generation device (5) is connected to a third pipeline (16), an end of the third pipeline (16) away from the pressure difference power generation device (5) is connected to a first heat exchanger (10), a second pipeline (15) is connected between the first heat exchanger (10) and the user pipeline (2), characterized in that: The pressure difference power generation system (4) further comprises a second heat exchanger (12), the second heat exchanger (12) being provided with a third inlet (1201) and a third outlet (1202), the third inlet (1201) being connected to the first pipeline (14), a spiral heat exchange tube (503) being provided in the pressure difference power generation device (5), the third outlet (1202) being connected to the inlet of the spiral heat exchange tube (503), a gas-liquid two-phase medium being formed at the third outlet (1202), and the pressure difference power generation device (5) being cooled by the spiral heat exchange tube (503).

2. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 1, characterized in that: The third pipeline (16) is provided with a fifth valve (24) for controlling the on / off of the gas outlet of the pressure difference power generation device (5) and a sixth valve (25) for preventing the backflow of gas in the third pipeline (16) in sequence according to the gas flow direction. The outlet of the spiral heat exchange tube (503) is connected to the first branch pipe (17). The first branch pipe (17) is provided with a seventh valve (26). The end of the first branch pipe (17) away from the spiral heat exchange tube (503) is connected to the third pipeline (16) from the rear end of the sixth valve (25).

3. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 2, characterized in that: A second detection assembly (11) is provided at one end of the second pipeline (15) close to the first heat exchanger (10), and the second detection assembly (11) includes a second temperature sensor (1101) and a second pressure sensor (1102). A fifth electric adjustment device (32) is also provided at the second outlet (1004) of the first heat exchanger (10), and the fifth electric adjustment device (32) is connected to the second temperature sensor (1101) for signal transmission.

4. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 3, characterized in that: The second heat exchanger (12) is further provided with a fourth inlet (1203) and a fourth outlet (1204). The fourth inlet (1203) is connected to the third pipeline (16) from the front end of the sixth valve (25), and the fourth outlet (1204) is connected to the second pipeline (15) from the front end of the second detection component (11).

5. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 4, characterized in that: A third electric regulating device (30) is provided between the third inlet (1201) and the first pipeline (14) for controlling the gas flow at the third inlet (1201), and a fourth electric regulating device (31) is connected to the front end of the fourth inlet (1203) for controlling the gas flow from the fourth inlet (1203).

6. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 5, characterized in that: A first valve (20) is provided on one end of the first pipeline (14) close to the main pipeline (1) for controlling the on / off of the first pipeline (14); a filter device (6) for filtering impurities in the gas, a flow meter (7) for detecting the gas flow rate, and a quick shut-off valve (8) for quickly shutting off the gas passage in the event of a fault are sequentially provided at the rear end of the first valve (20) on the first pipeline (14); A first electric regulating device (28) and a first detection assembly (9) are provided on one end of the first pipeline (14) close to the pressure difference power generation device (5). The first detection assembly (9) includes a first temperature sensor (901) and a first pressure sensor (902). The first pressure sensor (902) and the first electric regulating device (28) are signal-connected.

7. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 6, characterized in that: The first heat exchanger (10) is provided with a first inlet (1001) and a first outlet (1002), the first inlet (1001) being connected to the third pipeline (16), and the first outlet (1002) being connected to an end of the second pipeline (15) away from the user pipeline (2); The first heat exchanger (10) is further provided with a second inlet (1003) and a second outlet (1004), and the second inlet (1003) and the second outlet (1004) are connected to an external storage system of the heat exchange medium.

8. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 7, characterized in that: A fourth valve (23) is further connected to the first pipeline (14) at a position between the pressure differential power generation device (5) and the first detection assembly (9) for controlling the on-off of the gas path of the gas inlet of the pressure differential power generation device (5). An eighth valve (27) is connected between the fourth outlet (1204) and the second pipeline (15) for controlling the on-off of the gas path between the fourth outlet (1204) and the second pipeline (15).

9. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 8, characterized in that: A second electric regulating device (29) for emergency shutoff of the second pipeline (15) in a fault state and a second valve (21) for controlling the on-off of the second pipeline (15) are sequentially provided at the rear end of the second detection assembly (11) on the second pipeline (15).

10. The magnetic levitation pressure difference generator combined cooling and heating energy cycle system according to claim 9, characterized in that: A vent branch pipe (19) is provided between the second electric regulating device (29) and the second valve (21), one end of the vent branch pipe (19) is connected to the second pipeline (15), and the other end is connected to the external disposal device. The middle portion of the vent branch pipe (19) is connected to the second branch pipe (18), and the second branch pipe (18) is connected to the third pipeline (16) from the front end of the fourth electric regulating device (31). A safety valve (13) is provided on the second branch pipe (18).

Images