Non-condensable gas separation device and power generation system

Abstract

The utility model provides a non-condensable gas separation device and a power generation system, and belongs to the technical field of power generation, the non-condensable gas separation device can be applied to the power generation system, and the non-condensable gas separation device comprises a compressor which is connected with a condenser through a low-pressure mixed gas pipeline and is used for performing pressurization operation on mixed gas output by the condenser so as to output the pressurized mixed gas; the heat exchanger is connected with the compressor through a high-pressure mixed gas pipeline, is connected with the condenser through a liquid working medium return pipeline, and is used for condensing working medium steam in the pressurized mixed gas output by the compressor and keeping non-condensable gas in the mixed gas in a gas state so as to realize separation of the working medium and the non-condensable gas; and meanwhile, the working medium condensed into the liquid state is sent back to the condenser. The non-condensable gas can be separated out, normal heat absorption and heat release processes of a working medium in the evaporator, the condenser and other components are guaranteed, the ORC generator set can convert heat energy into electric energy more efficiently, and the power generation efficiency of the whole power generation system is improved.

Description

Technical Field

[0001] This application relates to the field of power generation technology, specifically to a non-condensable gas separation device and a power generation system. Background Technology

[0002] Low-boiling-point organic compounds (such as R134a, R143a, and many other substances) can undergo phase transitions under specific pressure (e.g., 0.5-3 MPa) and temperature (e.g., 80-200℃), making them suitable as working fluids for low-to-medium grade waste heat power generation in Organic Rankine Cycle (ORC) power generation systems. However, in practical industrial applications, it is difficult to achieve 100% purity for low-boiling-point organic working fluids. Furthermore, during ORC power generation system maintenance, a small amount of air may enter the system from the outside, often resulting in a mixture of non-condensable gases and the working fluid gas. During ORC power generation system operation, the non-condensable gas (NCG) significantly affects the condensation and heat transfer process of the working fluid, leading to a significant decrease in system output power and thermal efficiency. Moreover, since the non-condensable gas and the working fluid gas are in the same phase, their separation is difficult. Utility Model Content

[0003] This application provides a non-condensable gas separation device and a power generation system, which aims to solve the problem of reduced efficiency of ORC generator sets caused by non-condensable gases.

[0004] In a first aspect, this application provides a non-condensable gas separation device for use in a power generation system, the power generation system including a condenser, the condenser containing a mixture of working fluid and non-condensable gas, the non-condensable gas separation device comprising:

[0005] The compressor is connected to the condenser via a low-pressure mixed gas pipeline and is used to pressurize the mixed gas output from the condenser to output a pressurized mixed gas.

[0006] The heat exchanger is connected to the compressor via a high-pressure mixed gas pipeline and to the condenser via a liquid working fluid return pipeline. It is used to condense the working fluid vapor in the pressurized mixed gas output by the compressor, while keeping the non-condensable gas in the mixture in a gaseous state, so as to achieve the separation of the working fluid and the non-condensable gas. At the same time, the condensed liquid working fluid is sent back to the condenser.

[0007] Secondly, this application also provides a power generation system, the system comprising:

[0008] A condenser is used to cool a working fluid vapor into a liquid working fluid;

[0009] A preheater, connected to the condenser, is used to receive liquid working fluid from the condenser and to initially increase the heat of the liquid working fluid.

[0010] An evaporator, connected to the preheater, converts the liquid working fluid into superheated working fluid vapor by exchanging heat between the liquid working fluid and the heat source.

[0011] A generator set, connected to the evaporator, drives a turbine expander to rotate via superheated working fluid steam, thereby generating electricity and delivering the resulting gas mixture to the condenser; and

[0012] The non-condensable gas separation device as described in the first aspect.

[0013] This application provides a non-condensable gas separation device and a power generation system. In ORC power generation systems, the presence of a mixture of working fluid and non-condensable gases within the condenser leads to reduced generator efficiency. The non-condensable gas separation device provided in this application aims to solve this problem. First, a compressor is connected to the condenser via a low-pressure mixed gas pipeline, pressurizing the mixed gas output from the condenser and then outputting the pressurized mixed gas. Next, a heat exchanger is connected to the compressor via a high-pressure mixed gas pipeline and to the condenser via a liquid working fluid return pipeline. It condenses the working fluid vapor in the pressurized mixed gas output from the compressor, while the non-condensable gases remain in a gaseous state, thus achieving separation of the working fluid and non-condensable gases. The condensed liquid working fluid is then returned to the condenser. The advantage of this approach is that by effectively separating the non-condensable gases and the working fluid, the adverse effects of non-condensable gases within the system are avoided. Accumulation of non-condensable gases in the system can interfere with the normal phase change process of the working fluid, affecting heat transfer and conversion efficiency. This application can separate non-condensable gases, ensuring the normal heat absorption and release process of the working fluid in components such as evaporators and condensers, enabling ORC generator sets to convert thermal energy into electrical energy more efficiently and improving the power generation efficiency of the entire power generation system. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the power generation system provided in this application.

[0016] The attached figures are labeled as follows:

[0017] 10: Power generation system; 20: Non-condensable gas separation device;

[0018] 21: Compressor; 22: Heat exchanger; 23: Low-pressure mixed gas pipeline; 24: High-pressure mixed gas pipeline; 25: Liquid working fluid return pipeline; 26: Non-condensable gas separation pipeline.

[0019] 221: Compressor inlet interface; 222: Non-condensable gas outlet interface; 223: Condenser reflux interface; 224: Cold source feed interface; 225: Cold source discharge interface;

[0020] 11: Condenser; 12: Preheater; 13: Evaporator; 14: Generator set;

[0021] 15: Working fluid pump;

[0022] 131: Heat source inlet interface; 132: Preheater inlet interface;

[0023] 133: Preheater return port; 134: Generator set connection port. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] To address the problem of reduced generator efficiency caused by non-condensable gases in Organic Rankine Cycle (ORC) power generation systems, this application provides a non-condensable gas separation device and a power generation system. In the condenser of an ORC power generation system, a mixture of working fluid and non-condensable gases exists. The presence of non-condensable gases interferes with the normal operating state of the working fluid, thereby reducing the efficiency of the generator set. The compressor in the non-condensable gas separation device is connected to the condenser via a low-pressure mixed gas pipeline, pressurizing the mixed gas output from the condenser. This pressurization process is crucial because the state of the pressurized mixed gas changes, creating conditions for subsequent separation operations.

[0030] The compressed gas mixture enters the heat exchanger through a high-pressure gas pipeline. The heat exchanger is simultaneously connected to the condenser via a liquid working fluid return pipeline. In the heat exchanger, due to the difference in physical properties between the working fluid vapor and the non-condensable gases, the compressed gas mixture undergoes heat exchange, causing the working fluid vapor to condense into a liquid state, while the non-condensable gases, due to their non-condensable nature, remain in a gaseous state. This achieves effective separation of the working fluid and non-condensable gases. The purpose of this separation is that if non-condensable gases remain in the system, they occupy space, reducing the effective working space of the working fluid. Furthermore, they would hinder the absorption of heat from the heat source by the working fluid in the evaporator and impede the heat release process in the condenser. By separating these gases, these adverse effects are eliminated, allowing the working fluid to circulate within the system under normal pressure and temperature conditions, thus ensuring the normal operation of the ORC power generation system and improving power generation efficiency.

[0031] The working fluid, condensed into a liquid state in the heat exchanger, is returned to the condenser through the liquid working fluid return line. This process ensures that the working fluid can re-enter the ORC power generation system cycle, maintains the stability of the total amount of working fluid in the system, and allows the working fluid to re-enter the evaporator under suitable conditions for heat absorption and evaporation processes.

[0032] Furthermore, the non-condensable gas separator provided in this application can serve as an important component of an ORC power generation system, seamlessly connected to the condenser within the system. Seamless integration with the power generation system is achieved through pipeline connections including low-pressure mixed gas pipelines, high-pressure mixed gas pipelines, and liquid working fluid return pipelines. During power generation system operation, the non-condensable gas separator continuously processes the mixed gas generated within the condenser. As the working fluid completes a cycle—from the evaporator to the turbine expander for power generation, and then back to the condenser—the non-condensable gas separator promptly processes the mixed gas in the condenser, ensuring optimal working condition of the working fluid in each cycle. Moreover, the non-condensable gas separator guarantees the stability of the ORC power generation system. In an ORC power generation system, heat from the heat source is continuously absorbed by the working fluid and converted into electrical energy. If non-condensable gases are not separated in a timely manner, their accumulation will worsen with increasing system operating time, potentially leading to power generation system failure. The continuous operation of the non-condensable gas separator maintains the purity of the working fluid within the system, ensuring stable system operation.

[0033] Therefore, by effectively separating non-condensable gases, interference with the working fluid's phase change process, heat transfer, and conversion processes is avoided. This allows the working fluid to absorb heat more efficiently in the evaporator, convert it into mechanical energy in the turbine expander to drive the generator, and release heat in the condenser, thereby improving the overall power generation efficiency of the ORC generator set. Furthermore, the presence of non-condensable gases increases pressure fluctuations within the system, causing additional wear on equipment such as compressors and turbine expanders. The non-condensable gas separation device removes non-condensable gases, reducing these pressure fluctuations, decreasing equipment wear, and extending equipment lifespan. Moreover, because the non-condensable gas separation device maintains the normal state of the working fluid within the system, it reduces the possibility of system failures due to non-condensable gas accumulation, improving the reliability of the entire ORC power generation system. This is crucial for power generation facilities requiring long-term stable operation.

[0034] The non-condensable gas separation device and power generation system of this application are described below with reference to the accompanying drawings.

[0035] Please refer to Figure 1 , Figure 1 This is an architectural diagram of the power generation system provided in this application. A power generation system 10 includes a condenser 11, a preheater 12, an evaporator 13, a generator set 14, a working fluid pump 15, and a non-condensable gas separator 20.

[0036] In some embodiments, the power generation system 10 also includes a controller (not shown in the figure), which is electrically connected to the condenser 11, preheater 12, evaporator 13, generator set 14, and working fluid pump 15. The main function of the controller is to monitor the operating parameters of each component in the power generation system 10 and adjust the operating status of these components according to a preset control strategy. For example, the controller can monitor the temperature and pressure of the condenser 11 in real time and adjust the operating mode of the condenser according to these parameters to ensure its efficient operation. Similarly, the controller will also perform similar monitoring and adjustment on the preheater 12, evaporator 13, generator set 14, and working fluid pump 15, thereby achieving optimized operation and efficient power generation of the entire power generation system.

[0037] For example, condenser 11 is used to cool the working fluid vapor into a liquid working fluid. For instance, in an organic Rankine cycle power generation system, the working fluid, after being generated by a turbine expander, becomes vapor, i.e., working fluid vapor. Upon entering condenser 11, it exchanges heat with a cold source feed (such as air or water). The cold source typically has a lower temperature, creating a temperature difference between the cold source and the working fluid vapor when it enters condenser 11. According to the principle of heat transfer, heat is transferred from the high-temperature working fluid vapor to the low-temperature cold source, thus transforming it into a liquid working fluid.

[0038] When the working fluid vapor is cooled to a liquid state in condenser 11, its volume decreases significantly. In a closed system, such as power generation system 10, this volume change affects the system pressure. The normal operation of condenser 11 ensures that the system pressure remains within a suitable range. The flow of cold sources at the inlet and outlet of condenser 11 facilitates the circulation of the working fluid. After undergoing processes such as evaporation and expansion in the system, the working fluid becomes vapor and enters condenser 11. After being cooled to a liquid state by the cold source, it can be re-entered into other components of the system (such as preheater 12, evaporator 13, etc.) via working fluid pump 15 for the next cycle.

[0039] The working medium can be a low-boiling-point organic compound. Low-boiling-point organic compounds refer to organic compounds with relatively low boiling points. Boiling point is the temperature at which a substance changes from a liquid to a gaseous state; a low boiling point means that these substances can evaporate into a gaseous state at relatively low temperatures. Examples of low-boiling-point organic compounds include tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), difluoromethane (R32), trifluoromethane (R23), dichlorotrifluoroethane (R123), 1,3,3,3-tetrafluoropropene (R1234ze), 1,1,1,3,3-pentafluoropropane (R245fa), butane, isobutane, pentane, and cyclopentane.

[0040] For example, the working fluid pump 15 is the power source for the entire working fluid cycle. Its input is connected to the condenser 11, and its output is connected to the preheater 12. This means that the working fluid pump 15 is responsible for extracting the working fluid, which has been cooled into a liquid state in the condenser 11, and delivering it to the preheater 12. The working fluid pump 15 drives the liquid working fluid to circulate in the system.

[0041] For example, the preheater 12 is connected to the condenser 11 via a working fluid pump 15. The preheater 12 receives liquid working fluid from the condenser 11 and preheats the liquid working fluid using a heat source (which can be waste heat from the system or other low-grade heat energy) through its internal heat exchange structure. For example, the preheater 12 uses waste heat generated during the production process, which is relatively low in temperature but still has usable value, to heat the liquid working fluid. Part of the heated liquid working fluid is transported to the evaporator 13 through the preheater 12 inlet port, while the other part, depending on the system's needs and control strategy, exchanges heat with the liquid working fluid in the evaporator 13 through the preheater return port 133 or is recycled to improve the overall energy utilization efficiency of the system.

[0042] For example, the evaporator 13 is connected to the preheater 12, and its main function is to exchange heat between the liquid working fluid and the heat source. After absorbing a large amount of heat in the evaporator 13, the liquid working fluid is converted into superheated steam. This process is a key step in converting thermal energy into the internal energy of the working fluid. The superheated steam has high energy and can be used for subsequent power generation.

[0043] Specifically, the evaporator is equipped with a heat source inlet interface 131, which connects to an external heat source supply system. Heat source feed (such as heat collected by a solar collector, geothermal energy, or industrial waste heat) enters the evaporator 13 through this interface. Simultaneously, it receives preheated liquid working fluid from the preheater 12 through the preheater inlet interface 132. Inside the evaporator 13, the liquid working fluid is further heated and evaporated under the action of the heat source, ultimately transforming into superheated vapor. For example, in an organic Rankine cycle power generation system, the organic working fluid absorbs sufficient heat in the evaporator, transforming from a liquid state into a high-energy superheated vapor state.

[0044] The preheater return port 133 of evaporator 13 returns a portion of the liquid working fluid inside evaporator 13 to preheater 12, achieving heat recovery and utilization. Inside evaporator 13, there is a mixture of working fluids in different temperature zones or states. By returning a portion of the liquid working fluid to preheater 12, the heat distribution of the entire system can be optimized, improving energy utilization efficiency. The generator connection port 134 of evaporator 13 outputs the superheated steam formed by evaporation to generator set 14. The superheated steam carries a large amount of energy; upon entering generator set 14, it drives the turbine expander, thereby converting the energy into electrical energy. This ensures energy transfer between evaporator 13 and generator set 14, and is a crucial link in realizing the power generation function of the entire system.

[0045] For example, generator set 14 is connected to evaporator 13. When the superheated working fluid vapor generated in evaporator 13 enters the turbine expander in generator set 14, it drives the turbine expander to rotate. The rotation of the turbine expander drives generator set 14 to generate electricity. After power generation, the working fluid becomes a mixed gas and is then transported to condenser 11, thus forming a complete working fluid cycle process, continuously converting thermal energy into electrical energy.

[0046] Exemplarily, the noncondensable gas separation device 20 includes a compressor 21 and a heat exchanger 22. The compressor 21 is connected to the condenser 11 via a low-pressure mixed gas line 23. A mixture of working fluid and noncondensable gases exists within the condenser 11. The mixed gas output from the condenser 11 can enter the compressor 21 via the low-pressure mixed gas line 23. The function of the compressor 21 is to pressurize the mixed gas output from the condenser 11. For example, in an organic Rankine cycle system, by pressurizing the mixed gas to increase its pressure, the physical properties of the mixed gas can be altered, creating conditions for subsequent separation operations in the heat exchanger, ultimately outputting the pressurized mixed gas.

[0047] The low-pressure mixed gas pipeline 23, the high-pressure mixed gas pipeline 24, and the liquid working fluid return pipeline 25 are all equipped with valves to control the flow of gas. For example, the low-pressure mixed gas pipeline 23 connects the condenser 11 and the compressor 21, and the valve can regulate the flow rate of the mixed gas from the condenser 11 to the compressor 21. The high-pressure mixed gas pipeline 24 connects the compressor 21 and the heat exchanger 22, and the valve can control the flow rate of the mixed gas, after being pressurized by the compressor 21, to the heat exchanger 22. The liquid working fluid return pipeline 25 connects the heat exchanger 22 and the condenser 11, and the valve can control the flow rate of the liquid working fluid condensed in the heat exchanger 22 returning to the condenser 11.

[0048] Heat exchanger 22 is connected to the compressor via high-pressure mixed gas pipeline 24, thus receiving the pressurized mixed gas output from compressor 21. Simultaneously, heat exchanger 22 is also connected to condenser 11 via liquid working fluid return pipeline 25. Through liquid working fluid return pipeline 25, heat exchanger 22 can exchange working fluid with condenser 11 during the processing of the mixed gas. The function of heat exchanger 22 is to process the pressurized mixed gas output from compressor 21. This mixed gas contains working fluid vapor and non-condensable gases. Due to the different physical properties (such as condensation temperature) of the working fluid vapor and non-condensable gases, heat exchanger 22, through a specific heat exchange process, condenses the working fluid vapor in the mixed gas into a liquid state, while the non-condensable gases remain in a gaseous state, thereby achieving the separation of the working fluid and non-condensable gases. While condensing the working fluid vapor into a liquid state, heat exchanger 22 returns the condensed working fluid to condenser 11 through liquid working fluid return pipeline 25. This process helps maintain the circulation of the working fluid within the system, ensuring the normal operation of the system. For example, in a power generation system, the working fluid circulates continuously within the system. After the heat exchanger 22 sends the separated liquid working fluid back to the condenser 11, the working fluid can participate in the thermodynamic cycle of the system again.

[0049] The heat exchanger 22 is equipped with a liquid level monitoring device and a pressure relief device. The liquid level monitoring device monitors the liquid level inside the heat exchanger 22 in real time, as the liquid level affects its normal operation. A suitable liquid level helps ensure the stable operation of the heat exchange process; for example, too high or too low a liquid level may lead to a decrease in heat exchange efficiency or affect the processing flow of the working fluid. The pressure relief device is designed to deal with abnormal pressure conditions that may occur within the heat exchanger 22. When the internal pressure of the heat exchanger 22 rises abnormally due to certain reasons (such as a sudden failure in the heat exchange process, abnormal flow, etc.), the pressure relief device will activate to release the excess pressure, thereby protecting the heat exchanger 22 and the entire connected system, preventing equipment damage, leaks, and other dangerous situations caused by excessive pressure.

[0050] Specifically, heat exchanger 22 is provided with a compressor inlet port 221, a non-condensable gas outlet port 222, a condenser reflux port 223, a cold source feed port 224, and a cold source discharge port 225. The compressor inlet port 221 receives the mixed gas output from compressor 21, and this mixed gas has already been pressurized by compressor 21. In the entire system process, compressor 21 pressurizes the mixed gas output from condenser 11 and then sends the pressurized mixed gas into heat exchanger 22 through compressor inlet port 221. For example, in an organic Rankine cycle system, compressor 21 increases the pressure of the mixed gas, allowing it to enter heat exchanger 22 in a suitable state for subsequent processing.

[0051] Inside the heat exchanger, the working fluid vapor and non-condensable gas in the mixed gas are separated. The function of the non-condensable gas outlet port 222 is to output the separated non-condensable gas through the non-condensable gas separation pipe 26. Due to its special physical properties, the non-condensable gas does not condense like the working fluid vapor inside the heat exchanger 22, but remains in a gaseous state. Outputting the non-condensable gas from the non-condensable gas outlet port 222 can prevent it from accumulating in the system and thus affecting the normal operation of the system.

[0052] When the heat exchanger processes the mixed gas, it condenses the working fluid vapor into a liquid working fluid. The condenser return port 223 returns the condensed working fluid to the condenser 11. This process helps maintain the circulation of the working fluid within the system, ensuring its normal operation. For example, in a power generation system, the working fluid continuously circulates within the system. After the liquid working fluid is returned to the condenser 11 through the condenser return port 223, it can participate in the system's thermodynamic cycle again, such as for further cooling in the condenser 11.

[0053] The cold source inlet 224 is used for cold source feeding, that is, allowing the cold source material to enter the heat exchanger 22. The cold source material has a low temperature, and after entering the heat exchanger 22, it provides low-temperature conditions for the condensation of the working fluid. After entering the heat exchanger, the cold source material exchanges heat with the mixed gas inside the heat exchanger 22. After absorbing heat, the temperature of the cold source material rises, and then it leaves the heat exchanger 22 through the cold source outlet 225. This process realizes the transfer of heat from the mixed gas to the cold source material, which is an important condition for the condensation of the working fluid vapor in the heat exchanger. For example, cold water enters the heat exchanger 22, absorbs heat from the working fluid vapor, becomes water at a higher temperature, and then flows out of the heat exchanger 22 through the cold source outlet 225.

[0054] For example, the power generation system 10 can be an organic Rankine cycle power generation system. That is, the power generation system can operate based on the principle of the organic Rankine cycle. Low-boiling-point organic compounds such as tetrafluoroethane and 1,1,1-trifluoroethane can be used as working fluids. Low-boiling-point organic working fluids have unique advantages, with lower critical temperatures and pressures, allowing the system to utilize low-grade heat sources, such as industrial waste heat, solar thermal energy, or geothermal energy, to generate electricity. During the operation of the power generation system 10, the organic working fluid is first heated and evaporated into a gaseous state in the evaporator 13. Then, the gaseous working fluid enters the expander to expand and do work, driving the generator set 14 to generate electricity. After doing work, the working fluid vapor enters the condenser 11 and is cooled into a liquid state by the cooling medium. Finally, the liquid working fluid is sent back to the evaporator 13 via the working fluid pump 15 to start a new cycle.

[0055] In summary, the non-condensable gas separator of this application utilizes a combination of a compressor and a heat exchanger to achieve a specific purpose. This combination replaces the traditional refrigeration system, offering numerous advantages. Firstly, it reduces the need for one heat exchanger, directly improving heat exchange efficiency. Secondly, by eliminating the need for a refrigerant, safety hazards associated with refrigerants are avoided, while also reducing investment costs. Furthermore, using a scroll compressor can further reduce the plant's footprint, further lowering investment. Additionally, employing a non-condensable gas separator in an organic Rankine cycle waste heat power generation system can significantly increase power generation, by 5%-50%.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A non-condensable gas separation device, characterized in that, The system is applied to a power generation system, which includes a condenser containing a mixture of a working fluid and non-condensable gases. The non-condensable gas separation device includes: The compressor is connected to the condenser via a low-pressure mixed gas pipeline and is used to pressurize the mixed gas output from the condenser to output a pressurized mixed gas. The heat exchanger is connected to the compressor via a high-pressure mixed gas pipeline and to the condenser via a liquid working fluid return pipeline. It is used to condense the working fluid vapor in the pressurized mixed gas output by the compressor, while keeping the non-condensable gas in the mixture in a gaseous state, so as to achieve the separation of the working fluid and the non-condensable gas. At the same time, the condensed liquid working fluid is sent back to the condenser.

2. The non-condensable gas separation device according to claim 1, characterized in that, The heat exchanger is equipped with a compressor inlet port, a non-condensable gas outlet port, a condenser reflux port, a cold source feed port, and a cold source discharge port. The compressor inlet port receives the compressed mixed gas output from the compressor. The non-condensable gas outlet port outputs separated non-condensable vapor. The condenser reflux port returns the condensed working fluid to the condenser. The cold source feed port allows the cold source material to enter the heat exchanger and provide low-temperature conditions for the condensation of the working fluid. The cold source discharge port discharges the cold source material, which exits after exchanging heat with the mixed gas within the heat exchanger.

3. The non-condensable gas separation device according to claim 1, characterized in that, The low-pressure mixed gas pipeline, the high-pressure mixed gas pipeline, and the liquid working fluid return pipeline are all equipped with valves, which are used to control the flow of gas.

4. The non-condensable gas separation device according to claim 1, characterized in that, The heat exchanger is equipped with a liquid level monitoring device and a pressure relief device; wherein, the liquid level monitoring device is used to monitor the liquid level in the heat exchanger, and the pressure relief device is used to perform a pressure relief operation when the pressure in the heat exchanger is abnormal.

5. The non-condensable gas separation device according to claim 1, characterized in that, The working fluid is a low-boiling-point organic compound.

6. The non-condensable gas separation device according to claim 1, characterized in that, The power generation system is an organic Rankine cycle power generation system.

7. A power generation system, characterized in that, The power generation system includes: A condenser is used to cool a working fluid vapor into a liquid working fluid; A preheater, connected to the condenser, is used to receive liquid working fluid from the condenser and to initially increase the heat of the liquid working fluid. An evaporator, connected to the preheater, converts the liquid working fluid into superheated working fluid vapor by exchanging heat between the liquid working fluid and the heat source. A generator set, connected to the evaporator, drives a turbine expander to rotate via superheated working fluid steam, thereby generating electricity and delivering the resulting gas mixture to the condenser; and The non-condensable gas separation device as described in any one of claims 1-6.

8. The power generation system according to claim 7, characterized in that, The power generation system also includes a working fluid pump, the input end of which is connected to the condenser and the output end of which is connected to the preheater; the working fluid pump serves as the power source for the working fluid circulation and is responsible for transporting the liquid working fluid from the condenser to the preheater.

9. The power generation system according to claim 7, characterized in that, The evaporator is equipped with a heat source inlet interface, a preheater inlet interface, a preheater return interface, and a generator set connection interface. The heat source inlet interface is used to connect to an external heat source supply system to introduce heat into the evaporator, providing heat for the evaporation of the liquid working fluid. The preheater inlet interface receives the preheated liquid working fluid output from the preheater, allowing it to be further heated and evaporated in the evaporator, transforming into superheated working fluid vapor. The preheater return interface returns a portion of the liquid working fluid from the evaporator back to the preheater for heat recovery. The generator set connection interface outputs the superheated working fluid vapor formed in the evaporator to the generator set, providing the generator set with the superheated working fluid vapor required for energy conversion into electrical energy.

10. The power generation system according to claim 8, characterized in that, The power generation system also includes a controller, which is electrically connected to the condenser, the preheater, the evaporator, the generator set, and the working fluid pump, respectively. The controller is used to monitor the operating parameters of each component in the power generation system and adjust the operating status of the condenser, preheater, evaporator, generator set, and working fluid pump according to a preset control strategy.

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