Inorganic working medium closed circulation skid-mounted power generation system

Abstract

The invention relates to an inorganic working medium closed circulation skid-mounted power generation system which comprises a boiler, an expansion generator set, a working medium condensation system, a working medium pressurization system, a shaft seal heating device, a first high-pressure heating device and a second high-pressure heating device. The liquid inorganic working medium is converted into high-temperature and high-pressure steam in the boiler for power generation; dead steam flowing out of the expansion generator set is condensed by the working medium condensing system to form liquid inorganic working medium condensate; inorganic working medium condensate sequentially flows through the shaft seal heating device, the first high-pressure heating device and the second high-pressure heating device after being pressurized by the working medium pressurization system. And after multi-stage heat exchange and temperature rise, the water flows into the boiler, and acting circulation is started. The system adopts an inorganic working medium as a circulating medium, is safe, non-toxic and non-corrosive and is suitable for high-temperature and high-pressure scenes, closed circulation is beneficial to maximum utilization of material efficiency, and the skid-mounted structure is simple, convenient to install and manage and wide in application scene.

Description

Technical Field

[0001] The invention relates to the field of power generation, and in particular to an inorganic working fluid closed-cycle skid-mounted power generation system. Background Art

[0002] The skid-mounted power generation system has highly integrated functional modules, compact equipment layout and easy installation, which can significantly reduce on-site assembly time and management difficulty, and reduce costs. It is suitable for special working conditions such as offshore engineering platforms and stations, and overcomes the shortcomings of bulk power generation systems, such as large footprint, many pipelines, difficult management and high cost.

[0003] However, existing skid-mounted power generation systems mostly use organic working fluids, and at least two circulation systems (thermal oil circulation system and organic working fluid circulation system) are required to achieve the working cycle. The system structure is complex and the cost is high. In addition, organic working fluids are easily cracked under high temperature and high pressure, and are flammable and explosive, posing huge safety hazards. They are only suitable for scenarios with low-grade waste heat and have a limited scope of application. Summary of the invention

[0004] The present invention aims to address the problems existing in the prior art and provide an inorganic working fluid closed-cycle skid-mounted power generation system. The power generation system uses inorganic working fluid as the circulating medium, is safe and non-toxic, and is suitable for high temperature and high pressure scenarios. The closed cycle is conducive to the maximum utilization of material efficiency, the skid-mounted structure is simple, easy to install and manage, and has a wide range of application scenarios.

[0005] In order to achieve the purpose of the present invention, the technical solution provided by the present invention is as follows:

[0006] An inorganic working fluid closed cycle skid-mounted power generation system, comprising:

[0007] Boiler, expansion generator set, working fluid condensation system, working fluid pressurization system, shaft seal heating device, first high-pressure heating device, second high-pressure heating device;

[0008] The boiler, the expansion generator set, the working fluid condensation system, the working fluid pressurization system, the shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device are sequentially connected via pipelines;

[0009] After the liquid inorganic working medium is heated, gasified and superheated in the boiler, it is transformed into high-temperature and high-pressure steam, which is input into the expansion generator set through the pipeline, performs work in the generator set and generates electricity;

[0010] The inorganic working fluid after doing work is transformed into low-temperature exhaust steam. After flowing out of the expansion generator set, it is condensed by heat exchange in the working fluid condensation system to form liquid inorganic working fluid condensate.

[0011] After the inorganic working fluid condensate flows out of the working fluid condensation system and is pressurized by the working fluid pressurization system, it flows through the shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device in sequence;

[0012] The inlet of the shaft seal heating device is connected to the shaft seal part of the expansion generator set through a pipeline, and part of the high-temperature exhaust steam at the shaft seal part of the expansion generator set flows into the shaft seal heating device, and exchanges heat with the inorganic working fluid condensate flowing through the shaft seal heating device to increase the temperature; and the high-temperature exhaust steam is cooled and condensed, and then flows out from the outlet of the shaft seal heating device and is input into the inlet of the working fluid condensation system;

[0013] The inlet of the first high-pressure heating device is connected to the middle part of the expansion generator set through a pipeline, and part of the high-temperature exhaust steam in the middle part of the expansion generator set flows into the first high-pressure heating device to heat the inorganic working fluid condensate flowing through the first high-pressure heating device; and the high-temperature exhaust steam is cooled and condensed, and then flows out from the outlet of the first high-pressure heating device and merges with the outlet of the shaft seal heating device, and then is input into the inlet of the working fluid condensation system;

[0014] The inlet of the second high-pressure heating device is connected to the high-pressure end or front end of the expansion generator set through a pipeline, and part of the high-temperature exhaust steam at the high-pressure end or front end of the expansion generator set flows into the second high-pressure heating device to heat the inorganic working fluid condensate flowing through the second high-pressure heating device; and the high-temperature exhaust steam is cooled and condensed, and enters the first high-pressure heating device, and after mixing with the working fluid of the first high-pressure heating device, flows out from the outlet of the first heating device, and then merges with the outlet of the shaft seal heating device and is input into the inlet of the working fluid condensation system;

[0015] The inorganic working fluid condensate is heated through multi-stage heat exchange and then flows into the boiler to start a new power cycle.

[0016] The inorganic working fluid is deionized water and RH400.

[0017] The inorganic working fluid has good antioxidant properties and does not form iron oxide plasma. Compared with organic working fluids, the inorganic working fluid is non-toxic, non-corrosive, flame-retardant, environmentally friendly, and pollution-free. It can be used in high-temperature and high-pressure environments and has broad application prospects.

[0018] The high-temperature exhaust steam or low-temperature exhaust steam is formed after high-temperature and high-pressure inorganic working fluid steam performs work in an expansion generator set.

[0019] The temperature of high-temperature exhaust steam at different parts of the expansion generator set is different. The temperature of high-temperature exhaust steam at the shaft seal part is approximately between 180 and 350°C; the temperature of high-temperature exhaust steam at the middle part of the expansion generator set is between 50 and 80°C; the temperature of high-temperature exhaust steam at the high-pressure end or front end of the expansion generator set is between 150 and 180°C; the temperature of low-temperature exhaust steam at the outlet of the expansion generator set is between 30 and 60°C; the high-temperature exhaust steam at different parts of the expansion generator set is respectively input into the shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device, so that the high-temperature exhaust steam is used to perform heat exchange and temperature increase on the inorganic working fluid condensate step by step, thereby realizing energy recycling.

[0020] The expansion generator set is any one of an expander and a steam turbine.

[0021] The cooling medium used in the working medium condensation system is seawater, air and other forms of low-temperature medium.

[0022] The shaft seal heating device, the first high-pressure heating device and the second high-pressure heating device are respectively selected from one or more of a floating head heat exchanger, a U-tube heat exchanger, a fixed tube plate heat exchanger, a plate heat exchanger, a coil heat exchanger, a heat pipe heat exchanger, a plate-fin heat exchanger, a jacket heat exchanger, a spray heat exchanger or an immersed coil heat exchanger; preferably, a coil heat exchanger is used.

[0023] The working medium boosting system is preferably a boosting pump, which is a common device in the prior art. The present invention has no special restrictions on the boosting pump, and a centrifugal pump is commonly used.

[0024] Basic principles of the present invention:

[0025] After the liquid inorganic working medium is heated, gasified and superheated in the boiler, it is transformed into high-temperature and high-pressure steam, which is input into the expansion generator set through the pipeline, performs work in the generator set and generates electricity;

[0026] The high-temperature and high-pressure steam of the inorganic working fluid is converted into low-temperature exhaust steam after doing work. After flowing out of the expansion generator set, it is condensed by heat exchange in the working fluid condensation system to form liquid inorganic working fluid condensate.

[0027] After being pressurized by the working fluid booster system 4, the inorganic working fluid condensate flows through the shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device in sequence; the high-temperature exhaust steam is used for heat exchange and heating, and the inorganic working fluid condensate flows into the boiler after multi-stage heating, starting a new power cycle.

[0028] According to the technical solution of the present invention, the boiler 1 is used to heat the liquid inorganic working medium. After the liquid inorganic working medium is heated, vaporized and superheated, it generates high-temperature and high-pressure steam required for the system to generate electricity, which is input into the expansion generator set to generate work.

[0029] The boiler is a flue gas waste heat boiler in the form of supplementary combustion, or a direct combustion boiler. Preferably, the boiler is a flue gas waste heat boiler. When the boiler 1 is a flue gas waste heat boiler, the liquid inorganic working fluid exchanges heat with the high-temperature flue gas in the flue gas waste heat boiler to achieve the heating, vaporization, and superheating of the liquid inorganic working fluid, and generate the high-temperature and high-pressure steam required for the system to generate power, while the high-temperature flue gas is reduced to a certain temperature and discharged from the flue gas outlet to achieve the purpose of waste heat utilization.

[0030] The present invention has no particular limitation on the source of the high-temperature flue gas of the flue gas waste heat boiler. The high-temperature flue gas may be the high-temperature flue gas generated after combustion of a hot water boiler, a gas turbine, an internal combustion engine, a heating furnace or a reaction furnace.

[0031] When the boiler is a flue gas waste heat boiler, a flue gas three-way regulating valve group is arranged at the flue gas inlet of the flue gas waste heat boiler. The flue gas three-way regulating valve group is used to regulate the high-temperature flue gas entering the flue gas waste heat boiler. When the amount of high-temperature flue gas is too large or the temperature is too high, part of the high-temperature flue gas is discharged from the flue gas outlet through the bypass through the three-way regulating valve group to prevent the exhaust gas temperature from being too high and the load from being overloaded.

[0032] According to the technical solution of the present invention, preferably, the working fluid condensation system is also provided with a water ring vacuum system, and the water ring vacuum system is connected to the working fluid condensation system to form a vacuum system, extract the non-condensable steam in the inorganic working fluid, and maximize the conversion of the working fluid thermal energy into mechanical energy.

[0033] According to the technical solution of the present invention, preferably, the expansion generator set is also provided with a lubricating oil system, and the lubricating oil system provides the expansion generator set with lubricating oil that meets the requirements to ensure the normal operation of the equipment.

[0034] According to the technical solution of the present invention, preferably, the power generation system is also provided with a condensate storage device, and the condensate storage device is connected in parallel with the pipeline downstream of the working fluid condensation system through a first valve and a second valve. When the power generation system is shut down for maintenance or in an emergency, the first valve and the second valve are used to control the inorganic working fluid condensate to flow into the condensate storage device for storing the inorganic working fluid condensate in the equipment and pipeline.

[0035] According to the technical solution of the present invention, preferably, the power generation system includes multiple sets of boilers for heating the liquid inorganic working fluid. Accordingly, the inorganic working fluid condensate is divided into multiple paths after flowing out of the working fluid condensation system, and flows into the corresponding boilers for heating after multi-stage heating. After heating, gasification and overheating in the boiler, it is converted into high-temperature and high-pressure steam, which is input into the expansion generator set through the pipeline to start the work power generation cycle.

[0036] According to the technical solution of the present invention, the power generation system further includes an automatic control system for controlling the power generation system.

[0037] According to the technical solution of the present invention, the power generation system further includes a skid seat steel frame.

[0038] According to the technical solution of the present invention, the expansion generator set, the working fluid condensation system, the working fluid pressurization system, the shaft seal heating device, the first high-pressure heating device, the second high-pressure heating device, the water ring vacuum system, the lubricating oil system, and the condensate storage device constitute a skid.

[0039] Among them, the expansion generator set is located at the top layer of the skid; the shaft seal heating device, the first high-pressure heating device, the second high-pressure heating device, the water ring vacuum system, and the lubricating oil system are located at the middle layer of the skid; the working fluid condensation system, the working fluid pressurization system, and the condensate storage device are located at the bottom layer of the skid.

[0040] Technical effects of the present invention:

[0041] 1. Inorganic working fluid is used as the circulating medium. Inorganic working fluid has good antioxidant properties and does not form iron oxide plasma. Compared with organic working fluid, inorganic working fluid is non-toxic, non-corrosive, flame retardant, environmentally friendly, and pollution-free. It can be used in high temperature and high pressure environments and has broad application prospects.

[0042] 2. The present invention adopts a skid-mounted structure, which is simple and easy to install and manage, and can be widely used in special working conditions such as offshore engineering platforms and stations.

[0043] 3. The inorganic working fluid of the present invention forms a closed cycle, does not require fixed-discharge or continuous-discharge devices, has a simple structure, and has a high material efficiency utilization rate.

[0044] 4. The present invention can combine inorganic working fluids with flue gas waste heat boilers to achieve the recovery and utilization of high-temperature flue gas waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 : Schematic diagram of the structure of the inorganic working fluid closed cycle skid-mounted power generation system provided by the first embodiment of the present invention.

[0046] Figure 2 : Schematic diagram of the structure of an inorganic working fluid closed-cycle skid-mounted power generation system provided by the second embodiment of the present invention.

[0047] Figure 3 : A schematic structural diagram of an inorganic working fluid closed-cycle skid-mounted power generation system provided in the third embodiment of the present invention.

[0048] Figure 4 : Schematic diagram of the structure of an inorganic working fluid closed-cycle skid-mounted power generation system provided by the fourth embodiment of the present invention.

[0049] Figure 5 : A schematic structural diagram of an inorganic working fluid closed-cycle skid-mounted power generation system provided in the fifth embodiment of the present invention.

[0050] Description of reference numerals:

[0051] Boiler 1, expansion generator set 2, working fluid condensation system 3, working fluid pressurization system 4, shaft seal heating device 5, first high-pressure heating device 6, second high-pressure heating device 7, flue gas three-way regulating valve group 8, water ring vacuum system 9, lubricating oil system 10, condensate storage device 11, first valve 12, second valve 13. DETAILED DESCRIPTION

[0052] The present invention will now be further described in conjunction with the accompanying drawings, but the following embodiments do not constitute a limitation of the present invention.

[0053] Figure 1-5 The schematic diagram of the structure of the inorganic working fluid closed cycle skid-mounted power generation system provided by the present invention is shown.

[0054] Example 1

[0055] Figure 1 A schematic structural diagram of an inorganic working fluid closed-cycle skid-mounted power generation system provided by the present invention is shown.

[0056] like Figure 1 As shown, the inorganic working fluid closed cycle skid-mounted power generation system comprises: a boiler 1, an expansion generator set 2, a working fluid condensation system 3, a working fluid pressurization system 4, a shaft seal heating device 5, a first high-pressure heating device 6, and a second high-pressure heating device 7;

[0057] The boiler 1, the expansion generator set 2, the working medium condensation system 3, the working medium pressurization system 4, the shaft seal heating device 5, the first high-pressure heating device 6, and the second high-pressure heating device 7 are connected in sequence through pipelines;

[0058] After the liquid inorganic working medium is heated, gasified and superheated in the boiler 1, it is transformed into high-temperature and high-pressure steam, which is input into the expansion generator set 2 through the pipeline, performs work in the generator set 2 and generates electrical energy;

[0059] The inorganic working fluid after doing work is transformed into low-temperature exhaust steam, and after flowing out of the expansion generator set 2, it is condensed by heat exchange in the working fluid condensation system 3 to form liquid inorganic working fluid condensate;

[0060] After the inorganic working fluid condensate flows out of the working fluid condensation system 3 and is pressurized by the working fluid pressurization system 4, it flows through the shaft seal heating device 5, the first high-pressure heating device 6, and the second high-pressure heating device 7 in sequence;

[0061] The inlet of the shaft seal heating device 5 is connected to the shaft seal part of the expansion generator set 2 through a pipeline, and part of the high-temperature exhaust steam at the shaft seal part of the expansion generator set 2 flows into the shaft seal heating device 5, and exchanges heat with the inorganic working fluid condensate flowing through the shaft seal heating device 5 to increase the temperature; and the high-temperature exhaust steam is cooled and condensed, and then flows out from the outlet of the shaft seal heating device 5 and is input into the inlet of the working fluid condensation system 3;

[0062] The inlet of the first high-pressure heating device 6 is connected to the middle part of the expansion generator set 2 through a pipeline, and part of the high-temperature exhaust steam in the middle part of the expansion generator set 2 flows into the first high-pressure heating device 6 to heat the inorganic working fluid condensate flowing through the first high-pressure heating device 6; and the high-temperature exhaust steam is cooled and condensed, and then flows out from the outlet of the first high-pressure heating device 6 and merges with the outlet of the shaft seal heating device 5 and is input into the inlet of the working fluid condensation system 3;

[0063] The inlet of the second high-pressure heating device 7 is connected to the high-pressure end or the front end of the expansion generator set 2 through a pipeline, and part of the high-temperature exhaust steam at the high-pressure end or the front end of the expansion generator set 2 flows into the second high-pressure heating device 7, and heat exchange and heat up the inorganic working fluid condensate flowing through the second high-pressure heating device 7; and the high-temperature exhaust steam enters the first high-pressure heating device 6 after cooling and condensing, and flows out from the outlet of the first heating device 6 after mixing with the working fluid of the first high-pressure heating device 6, and is input into the inlet of the working fluid condensation system 3 after merging with the outlet of the shaft seal heating device 5;

[0064] The inorganic working fluid condensate is heated through multi-stage heat exchange and flows into boiler 1 to start a new power cycle.

[0065] Example 2

[0066] Attached Figure 2 It is a schematic structural diagram of another inorganic working fluid closed cycle skid-mounted power generation system provided by the present invention.

[0067] Compared with Example 1, the difference between the two is that the boiler 1 is a flue gas waste heat boiler, and a flue gas three-way regulating valve group 8 is arranged at the flue gas inlet of the flue gas waste heat boiler. The flue gas three-way regulating valve group 8 is used to regulate the high-temperature flue gas entering the flue gas waste heat boiler 1. When the amount of high-temperature flue gas is too large or the temperature is too high, part of the high-temperature flue gas is discharged from the flue gas outlet through the bypass through the three-way regulating valve group 8 to prevent the exhaust temperature from being too high and the load from being overloaded.

[0068] When boiler 1 is a flue gas waste heat boiler, the liquid inorganic working fluid exchanges heat with the high-temperature flue gas in the flue gas waste heat boiler to achieve heating, vaporization, and superheating of the liquid inorganic working fluid, thereby generating high-temperature and high-pressure steam required for power generation in the system, while the high-temperature flue gas is cooled to a certain temperature and discharged from the flue gas outlet, thereby achieving the purpose of waste heat utilization.

[0069] The present invention has no particular limitation on the source of the high-temperature flue gas, and the high-temperature flue gas may be the high-temperature flue gas generated after combustion of a hot water boiler, a gas turbine, an internal combustion engine, a heating furnace or a reaction furnace.

[0070] Example 3

[0071] Attached Figure 3 It is a schematic structural diagram of another inorganic working fluid closed cycle skid-mounted power generation system provided by the present invention.

[0072] Compared with Example 2, the difference between the two is that a condensate storage device 11 is provided downstream of the working fluid condensation system 3, and the condensate storage device 11 is connected in parallel with the pipeline downstream of the working fluid condensation system 3 via a first valve 12 and a second valve 13. When the power generation system is shut down for maintenance or in an emergency, the first valve 12 and the second valve 13 are used to control the inorganic working fluid condensate to flow into the condensate storage device 11 for storing the inorganic working fluid condensate in the equipment and pipeline.

[0073] Example 4

[0074] Attached Figure 4 It is a schematic structural diagram of another inorganic working fluid closed cycle skid-mounted power generation system provided by the present invention.

[0075] Compared with Example 3, the difference between the two is:

[0076] The working medium condensation system 3 is provided with a water ring vacuum system 9, which is connected to the working medium condensation system 3 and is used to form a vacuum system to cool the inorganic working medium into a liquid working medium;

[0077] The expansion generator set 2 is also provided with a lubricating oil system 10. The lubricating oil system 9 provides the expansion generator set 2 with lubricating oil that meets the requirements to ensure the normal operation of the equipment.

[0078] Example 5

[0079] Attached Figure 5 It is a schematic structural diagram of another inorganic working fluid closed cycle skid-mounted power generation system provided by the present invention.

[0080] Compared with Example 4, the difference between the two is:

[0081] It includes multiple sets of boilers 1, which are used to heat the liquid inorganic working fluid; accordingly, the inorganic working fluid condensate flows out of the working fluid condensation system 3 and is divided into multiple paths. After multi-stage heating and temperature raising, it flows into the corresponding boilers for heating. After heating, gasification and overheating in the boiler, it is converted into high-temperature and high-pressure steam, which is input into the expansion generator set 2 through the pipeline to start the work cycle.

[0082] The present invention has been introduced in detail above. Specific examples have been used in the specification to illustrate the principles and implementation methods of the present invention. However, the examples are only used to help understand the present invention and should not be construed as limiting the present invention.

Claims

1. An inorganic working fluid closed cycle skid-mounted power generation system, comprising: Boiler, expansion generator set, working fluid condensation system, working fluid pressurization system, shaft seal heating device, first high-pressure heating device and second high-pressure heating device; The boiler, the expansion generator set, the working fluid condensation system, the working fluid pressurization system, the shaft seal heating device, the first high-pressure heating device and the second high-pressure heating device are connected in sequence through pipelines; The liquid inorganic working fluid is converted into high-temperature and high-pressure steam after being heated in the boiler, and flows into the expansion generator set to perform work and be used for power generation; the inorganic working fluid after performing work is converted into low-temperature exhaust steam, and after flowing out of the expansion generator set, it is condensed by heat exchange in the working fluid condensation system to form liquid inorganic working fluid condensate; After being pressurized by the working medium pressurizing system, the inorganic working medium condensate flows through the shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device in sequence; The inlet of the shaft seal heater device is connected to the shaft seal part of the expansion generator set, and the high-temperature exhaust steam from the shaft seal part flows into the shaft seal heater device to heat and heat the inorganic working fluid condensate flowing therethrough; The inlet of the first high-pressure heating device is connected to the middle part of the expansion generator set, and the high-temperature exhaust steam in the middle part flows into the first high-pressure heating device to heat the inorganic working fluid condensate flowing therethrough; The inlet of the second high-pressure heating device is connected to the high-pressure end or the front end of the expansion generator set, and the high-temperature exhaust steam from the high-pressure end or the front end flows into the second high-pressure heating device to perform heat exchange and temperature increase on the inorganic working fluid condensate flowing therethrough; after multi-stage heat exchange and temperature increase, the inorganic working fluid condensate flows into the boiler to start the power cycle.

2. The power generation system according to claim 1, characterized in that: The inorganic working fluid is deionized water or RH400.

3. The inorganic working fluid closed cycle skid-mounted power generation system according to claim 2, characterized in that: The boiler is a flue gas waste heat boiler, in which the liquid inorganic working fluid exchanges heat with the high-temperature flue gas to increase its temperature and is converted into high-temperature and high-pressure steam.

4. The power generation system according to claim 3, characterized in that: A flue gas three-way regulating valve group is provided at the flue gas inlet of the flue gas waste heat boiler to regulate the flue gas entering the flue gas waste heat boiler.

5. The power generation system according to claim 4, characterized in that: A condensate storage device is also provided, which is connected in parallel with a pipeline downstream of the working fluid condensation system via a first valve and a second valve, and is used for storing inorganic working fluid condensate.

6. The power generation system according to claim 5, characterized in that: The expansion generator set is provided with a lubricating oil system.

7. The power generation system according to claim 6, characterized in that: The working fluid condensation system is also provided with a water ring vacuum system, which is connected to the working fluid condensation system and is used to form a vacuum, extract the non-condensable steam in the inorganic working fluid, and maximize the conversion of the working fluid thermal energy into mechanical energy.

8. The power generation system according to claim 1, characterized in that: The expansion generator set is selected from one of an expander and a steam turbine.

9. The power generation system according to claim 1, characterized in that: The cooling medium of the working medium condensation system is seawater, air or other forms of low-temperature medium.

10. The power generation system according to claim 1, characterized in that: The shaft seal heating device, the first high-pressure heating device, and the second high-pressure heating device are selected from one or more of a floating head heat exchanger, a U-tube heat exchanger, a fixed tube plate heat exchanger, a plate heat exchanger, a coil heat exchanger, a heat pipe heat exchanger, a plate-fin heat exchanger, a jacketed heat exchanger, a spray heat exchanger, or an immersed coil heat exchanger.

11. The power generation system according to claim 10, characterized in that: The first high-pressure heating device and the second high-pressure heating device adopt coil-wound heat exchangers.

12. The power generation system according to claim 7, characterized in that: The expansion generator set, the working fluid condensation system, the working fluid pressurization system, the shaft seal heating device, the first high-pressure heating device, the second high-pressure heating device, the water ring vacuum system, the lubricating oil system, and the condensate storage device constitute a skid; Among them, the expansion generator set is located on the top layer of the skid; The shaft seal heating device, the first high-pressure heating device, the second high-pressure heating device, the water ring vacuum system, and the lubricating oil system are located in the middle layer of the skid; the working fluid condensation system, the working fluid pressurization system, and the condensate storage device are located in the bottom layer of the skid.

13. The power generation system according to any one of claims 1 to 12, characterized in that: It includes multiple sets of boilers for heating liquid inorganic working fluids. The inorganic working fluid condensate flows out of the working fluid condensation system and is divided into multiple paths. After being heated at multiple stages, it flows into corresponding boilers respectively. After being heated, gasified and overheated by the boilers, it is converted into high-temperature and high-pressure steam and input into the expansion generator set to start the work cycle.

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