Turbine expander test device and turbine expander test system

Abstract

The present application discloses a turbine expander test device and a turbine expander test system. The turbine expander test device includes an expander, a first storage tank, a second storage tank, a gas pipeline, an exhaust pipeline, and a heat exchanger. The first storage tank is used to store a first medium at a first preset temperature, and the second storage tank is used to store a second medium at a second preset temperature, where the first preset temperature is not equal to the second preset temperature. One end of the gas pipeline is connected to both the first storage tank and the second storage tank, and the other end is connected to the air inlet of the expander. The first storage tank is used to deliver the first medium to the gas pipeline at a first preset flow rate, and the second storage tank is used to deliver the second medium to the gas pipeline at a second preset flow rate. The exhaust pipeline is connected to the air outlet of the expander. Both the gas pipeline and the exhaust pipeline pass through the heat exchanger, and the gas pipeline and the exhaust pipeline perform heat exchange. The present application can achieve gas temperature regulation without frequently replacing gas storage tanks with different temperatures.

Description

Technical Field

[0001] The present application relates to the field of turbine expander testing devices, and in particular to a turbine expander testing device. Background Art

[0002] In related technologies, to verify the operating performance of a turboexpander under different low-temperature conditions, it is necessary to supply gas media at different temperatures to the expander and record the turboexpander's operating status using a test device. Existing test devices often use a single-temperature low-temperature gas as the working medium. Changing the gas temperature to simulate different test conditions requires replacing gas storage tanks with different temperatures, resulting in low turboexpander testing efficiency. Furthermore, during the turboexpander testing process, the exhaust gas from the turboexpander contains a large amount of heat, and this exhaust gas is not utilized, resulting in energy waste. Summary of the Invention

[0003] In order to improve the testing effect of a turbine expander and increase the energy utilization rate of the testing device, the present application provides a turbine expander testing device.

[0004] The present application further proposes a turboexpander testing system.

[0005] The present application provides a turbo expander testing device that adopts the following technical solution:

[0006] A turbine expander testing device includes: an expander; a first storage tank and a second storage tank, wherein the first storage tank is used to store a first medium at a first preset temperature, and the second storage tank is used to store a second medium at a second preset temperature, wherein the first preset temperature is not equal to the second preset temperature.

[0007] A gas pipeline, one end of which is connected to both the first storage tank and the second storage tank, and the other end of which is connected to the air inlet of the expander, the first storage tank being used to deliver the first medium to the gas pipeline at a first preset flow rate, the second storage tank being used to deliver the second medium to the gas pipeline at a second preset flow rate, the first medium and the second medium being mixed in the gas pipeline.

[0008] An exhaust pipeline is connected to the exhaust end of the expander.

[0009] A heat exchanger, wherein both the gas supply pipeline and the exhaust pipeline pass through the heat exchanger, and the gas supply pipeline exchanges heat with the exhaust pipeline through the heat exchanger.

[0010] By adopting this technical solution, a first medium is delivered to the gas pipeline at a first preset flow rate through a first storage tank, and a second medium is delivered to the gas pipeline at a second preset flow rate through a second storage tank. The first and second media are mixed in the gas pipeline. The temperature of the gas medium in the gas pipeline is controlled by adjusting the first and second preset flow rates, thereby delivering gas of different temperatures to the expander. Compared with existing technologies, this allows flexible adjustment of gas temperature without the need for frequent replacement of gas tanks with different temperatures, thereby improving the testing efficiency of the turboexpander.

[0011] Preferably, the gas transmission pipeline includes a first branch, a second branch and a mixing pipeline, the mixing pipeline is connected to the air inlet end of the expander, the first branch is connected between the mixing pipeline and the first storage tank, the first branch is provided with a first regulating valve, the first regulating valve is used to regulate the flow of the first medium, the second branch is connected between the mixing pipeline and the second storage tank, the second branch is provided with a second regulating valve, the second regulating valve is used to regulate the flow of the second medium.

[0012] By adopting the above technical solution, when it is necessary to adjust the temperature of the gas medium in the mixing pipeline, the operator can adjust the ratio of the first medium and the second medium in the mixing pipeline by changing the opening of the first regulating valve and the opening of the second regulating valve, thereby adjusting the temperature of the gas medium, and thus meeting the testing requirements of the expander under different temperature conditions without replacing the gas tank.

[0013] Preferably, the turbine expander testing device also includes: a cold dryer and a gas-liquid separator, and the cold dryer and the gas-liquid separator are both arranged on the gas pipeline. Along the gas transmission direction of the gas pipeline, the cold dryer is located on the downstream side of the heat exchanger, and the gas-liquid separator is located on the downstream side of the cold dryer.

[0014] By adopting the above technical solution, the water vapor in the gas medium in the gas pipeline is condensed by a cold dryer to reduce the moisture content in the gas medium. After the water vapor in the gas medium is condensed, the gas-liquid separator separates and discharges the liquid water condensed in the gas medium to further remove residual moisture, thereby ensuring that the gas medium entering the expander is in a dry state, avoiding frost or ice formation in the gas medium in a low-temperature environment, and thus improving the operating stability of the turbine expander during low-temperature testing.

[0015] Preferably, the turboexpander testing device further comprises: a filter, wherein the filter is provided in the gas pipeline, and along the gas delivery direction of the gas pipeline, the filter is located on the upstream side of the heat exchanger.

[0016] By adopting the above technical solution, the filter filters and intercepts impurities in the gas medium, thereby preventing impurity particles from entering the expander and causing blockage or wear, thereby improving the stability of the turbine expander test device during long-term operation and the service life of core components.

[0017] Preferably, the turbine expander testing device further includes: a first bypass, a first temperature detection element, a first control valve and a controller, the first temperature detection element and the first control valve are both provided in the gas pipeline, and the first temperature detection element, the first control valve and the heat exchanger are arranged in sequence along the gas transmission direction of the gas pipeline, the first bypass is connected between the upstream side and the downstream side of the heat exchanger, the first bypass and the heat exchanger are independently arranged, the first bypass is connected to the first control valve, the first control valve is used to control the medium in the gas pipeline to flow into the first bypass or the heat exchanger, the first temperature detection element is used to detect the temperature of the medium in the gas pipeline, the first control valve and the first temperature detection element are both communicatively connected to the controller, and the controller is used to control the working state of the first control valve according to the detection signal of the first temperature detection element.

[0018] By adopting the above technical solution, the controller receives the detection signal of the first temperature detection component and compares the temperature of the gas medium in the gas pipeline with the preset temperature. When the temperature of the gas medium is equal to the preset temperature, the first control valve controls the gas medium to flow into the first bypass. When the temperature of the gas medium is lower than the preset temperature, the first control valve controls the gas medium to flow into the heat exchanger and the heat exchanger heats the gas medium, thereby adjusting the temperature of the gas medium in the gas pipeline to avoid the temperature of the gas medium in the gas pipeline being too low to affect the normal operation of the expander, thereby improving the automatic control capability of the turbine expander testing device.

[0019] Preferably, the turboexpander testing device further comprises: a heater, which is provided in the gas pipeline, and is located on the downstream side of the heat exchanger along the gas delivery direction of the gas pipeline.

[0020] By adopting the above technical solution, the gas medium in the gas pipeline is further heated by a heater so that the temperature of the gas medium continues to increase after the initial heat exchange in the heat exchanger, ensuring that the gas medium meets the test temperature requirements before entering the expander, thereby improving the temperature adaptability of the turbine expander test device.

[0021] Preferably, the turbine expander testing device further includes: a second bypass, a second temperature detecting element, a second control valve and a controller, the second temperature detecting element and the second control valve are both provided in the gas pipeline, and along the gas transmission direction of the gas pipeline, the heat exchanger, the second temperature detecting element, the second control valve and the heater are arranged in sequence, the second bypass is connected between the upstream side and the downstream side of the heater, the second bypass and the heater are independently arranged, the second bypass is connected to the second control valve, the second control valve is used to control the medium in the gas pipeline to flow into the second bypass or the heater, the second temperature detecting element is used to detect the temperature of the medium in the gas pipeline, the second control valve and the second temperature detecting element are both communicatively connected to the controller, and the controller is used to control the working state of the second control valve according to the detection signal of the second temperature detecting element.

[0022] By adopting the above technical solution, the controller receives the detection signal of the second temperature detection component and compares the temperature of the gas medium in the gas pipeline with the preset temperature. When the temperature of the gas medium is equal to the preset temperature, the second control valve controls the gas medium to flow into the second bypass. When the temperature of the gas medium is lower than the preset temperature, the second control valve controls the gas medium to flow into the heater and the heater heats the gas medium. In this way, the temperature of the gas medium in the gas pipeline can be adjusted to avoid the excessively low temperature of the gas medium in the gas pipeline affecting the normal operation of the expander, thereby improving the automatic control capability of the turbine expander testing device.

[0023] The present application provides a turboexpander testing system that adopts the following technical solution:

[0024] A turbine expander testing system includes a turbine expander testing device, wherein the turbine expander testing device is the turbine expander testing device mentioned above.

[0025] By adopting this technical solution, a first medium is delivered to the gas pipeline at a first preset flow rate through a first storage tank, and a second medium is delivered to the gas pipeline at a second preset flow rate through a second storage tank. The first and second media are mixed in the gas pipeline. The temperature of the gas medium in the gas pipeline is controlled by adjusting the first and second preset flow rates, thereby delivering gas of different temperatures to the expander. Compared with existing technologies, this allows flexible adjustment of gas temperature without the need for frequent replacement of gas tanks with different temperatures, thereby improving the testing efficiency of the turboexpander.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. A first medium is delivered to the gas pipeline at a first preset flow rate through a first storage tank, and a second medium is delivered to the gas pipeline at a second preset flow rate through a second storage tank. The first and second media are mixed in the gas pipeline. The temperature of the gas medium in the gas pipeline is controlled by adjusting the first and second preset flow rates to deliver gas of varying temperatures to the expander. Compared to existing technologies, this system allows for flexible gas temperature adjustment without the need for frequent replacement of gas storage tanks at varying temperatures, thereby improving turbine expander testing efficiency.

[0028] 2. The gas medium in the gas pipeline is further heated by the heater so that the gas medium continues to increase in temperature after the initial heat exchange in the heat exchanger. This ensures that the gas medium meets the test temperature requirements before entering the expander, thereby improving the temperature adaptability of the turbine expander test device.

[0029] 3. The controller receives the detection signal of the second temperature detection component and compares the temperature of the gas medium in the gas pipeline with the preset temperature. When the temperature of the gas medium is equal to the preset temperature, the second control valve controls the gas medium to flow into the second bypass. When the temperature of the gas medium is lower than the preset temperature, the second control valve controls the gas medium to flow into the heater and the heater heats the gas medium. This can adjust the temperature of the gas medium in the gas pipeline to avoid the temperature of the gas medium in the gas pipeline being too low and affecting the normal operation of the expander, thereby improving the automatic control capability of the turbine expander test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of a turbine expander testing device according to an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 100. Turbine expander testing device;

[0033] 1. Expander;

[0034] 2. First storage tank; 3. Second storage tank;

[0035] 4. Gas transmission pipeline; 41. First branch; 411. First regulating valve; 42. Second branch; 421. Second regulating valve; 43. Mixing pipeline;

[0036] 5. Exhaust pipe; 6. Heat exchanger; 7. Cold dryer; 8. Gas-liquid separator; 9. Filter; 10. First bypass; 11. First temperature detection element; 12. First control valve; 13. Heater; 14. Second bypass; 15. Second temperature detection element; 16. Second control valve. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 This application is described in further detail.

[0038] The embodiment of the present application discloses a turbine expander testing device 100 .

[0039] Reference Figure 1 According to an embodiment of the present application, the turbine expander testing device 100 includes: an expander 1, a first storage tank 2, a second storage tank 3, a gas transmission pipeline 4, an exhaust pipeline 5 and a heat exchanger 6.

[0040] The first storage tank 2 is used to store a first medium at a first preset temperature, and the second storage tank 3 is used to store a second medium at a second preset temperature. The first preset temperature is not equal to the second preset temperature.

[0041] In some specific embodiments, the first medium may be liquid nitrogen, the second medium may be gaseous nitrogen, the first preset temperature is lower than the second preset temperature, and the expander 1 is tested by delivering nitrogen to the expander 1 .

[0042] One end of the gas pipeline 4 is connected to both the first storage tank 2 and the second storage tank 3, and the other end of the gas pipeline 4 is connected to the air inlet end of the expander 1. The first storage tank 2 is used to deliver the first medium to the gas pipeline 4 according to a first preset flow rate, and the second storage tank 3 is used to deliver the second medium to the gas pipeline 4 according to a second preset flow rate. The first medium and the second medium are mixed in the gas pipeline 4.

[0043] The exhaust pipeline 5 is connected to the gas outlet end of the expander 1 . The gas supply pipeline 4 and the exhaust pipeline 5 both pass through the heat exchanger 6 . The gas supply pipeline 4 exchanges heat with the exhaust pipeline 5 through the heat exchanger 6 .

[0044] The first storage tank 2 delivers the first medium to the gas pipeline 4 at a first preset flow rate, and the second storage tank 3 delivers the second medium to the gas pipeline 4 at a second preset flow rate. The first medium and the second medium are mixed in the gas pipeline 4, and the temperature of the gas medium in the gas pipeline 4 is determined by the first preset flow rate and the second preset flow rate. That is, the temperature of the gas medium in the gas pipeline 4 is determined by the ratio of the first medium to the second medium in the gas medium in the gas pipeline 4. By controlling the first preset flow rate for delivering the first medium to the gas pipeline 4 and the second preset flow rate for delivering the second medium to the gas pipeline 4, the ratio of the first medium to the second medium in the gas medium in the gas pipeline 4 is controlled, thereby adjusting the temperature of the gas medium in the gas pipeline 4 to deliver gases of different temperatures to the expander 1.

[0045] In addition, the gas in the gas pipeline 4 flows along the gas pipeline 4, and the gas in the gas pipeline 4 passes through the heat exchanger 6 to exchange heat with the gas in the exhaust pipeline 5. In the heat exchanger 6, the gas in the gas pipeline 4 is further preheated to reach the target test temperature. Then, the gas in the gas pipeline 4 enters the air inlet end of the expander 1 to drive the expander 1 to operate, so as to simulate the operating status under different low-temperature conditions.

[0046] In some specific embodiments, the ratio of the first medium to the second medium in the gas medium in the gas pipeline 4 may be 1:1.5.

[0047] In other specific embodiments, the gas medium in the gas pipeline 4 may be only the first medium, that is, the first storage tank 2 delivers the first medium to the gas pipeline 4 , and the second storage tank 3 does not deliver the second medium to the gas pipeline 4 .

[0048] In other specific embodiments, the gas medium in the gas pipeline 4 may be only the second medium, that is, the first storage tank 2 does not transport the first medium to the gas pipeline 4 , and the second storage tank 3 transports the second medium to the gas pipeline 4 .

[0049] Thus, the first medium is delivered to the gas pipeline 4 at a first preset flow rate through the first storage tank 2, and the second medium is delivered to the gas pipeline 4 at a second preset flow rate through the second storage tank 3. The first medium and the second medium are mixed in the gas pipeline 4. The temperature of the gas medium in the gas pipeline 4 is controlled by adjusting the first preset flow rate and the second preset flow rate to deliver gas of different temperatures to the expander 1. Compared with the prior art, the gas temperature can be flexibly adjusted without frequently replacing gas tanks with different temperatures, thereby improving the testing efficiency of the turboexpander 1.

[0050] Reference Figure 1 In some embodiments of the present application, the gas delivery pipeline 4 includes a first branch 41, a second branch 42 and a mixing pipeline 43. The mixing pipeline 43 is connected to the air inlet end of the expander 1. The first branch 41 is connected between the mixing pipeline and the first storage tank 2. The second branch 42 is connected between the mixing pipeline and the second storage tank 3. Specifically, one end of the mixing pipeline 43 is connected to the air inlet end of the expander 1, and the other end of the mixing pipeline 43 is connected to both the first branch 41 and the second branch 42.

[0051] The first medium flows into the mixing pipe 43 along the first branch 41 , and the second medium flows into the mixing pipe 43 along the second branch 42 . The first medium and the second medium are mixed in the mixing pipe 43 , and the gas in the mixing pipe 43 flows into the expander 1 .

[0052] Furthermore, the first branch 41 is provided with a first regulating valve 411 for regulating the flow of the first medium, and the second branch 42 is provided with a second regulating valve 421 for regulating the flow of the second medium.

[0053] The first regulating valve 411 controls a first preset flow rate of the first medium delivered from the first storage tank 2 to the mixing pipeline 43, and the second regulating valve 421 controls a second preset flow rate of the second medium delivered from the second storage tank 3 to the mixing pipeline 43. By adjusting the opening of the first regulating valve 411 and the opening of the second regulating valve 421, the ratio of the first medium and the second medium in the mixing pipeline 43 is changed, thereby adjusting the temperature of the gas medium in the mixing pipeline 43.

[0054] When it is necessary to adjust the temperature of the gas medium in the mixing pipeline 43, the operator can adjust the ratio of the first medium and the second medium in the mixing pipeline 43 by changing the opening of the first regulating valve 411 and the opening of the second regulating valve 421, thereby adjusting the temperature of the gas medium, and thus meeting the test requirements of the expander 1 under different temperature conditions without replacing the gas tank.

[0055] In some specific embodiments, both the first regulating valve 411 and the second regulating valve 421 may be proportional solenoid valves.

[0056] Reference Figure 1 In some embodiments of the present application, the turbine expander testing device 100 may further include: a cold dryer 7 and a gas-liquid separator 8. The cold dryer 7 and the gas-liquid separator 8 are both arranged in the gas pipeline 4. Along the gas transmission direction of the gas pipeline 4, the cold dryer 7 is located on the downstream side of the heat exchanger 6, and the gas-liquid separator 8 is located on the downstream side of the cold dryer 7. The cold dryer 7 is used to dry the gas medium in the gas pipeline 4, and the gas-liquid separator 8 is used to separate the liquid in the gas medium in the gas pipeline 4.

[0057] The gas medium in the gas transmission pipeline 4 passes through the cold dryer 7 and the gas-liquid separator 8 in sequence and then enters the expander 1. After passing through the heat exchanger 6, the gas medium enters the cold dryer 7. The cold dryer 7 condenses the water vapor in the gas medium to reduce the moisture content in the gas medium. After passing through the cold dryer 7, the gas medium enters the gas-liquid separator 8. The gas-liquid separator 8 separates and discharges the liquid water condensed in the gas medium, thereby further removing the residual moisture in the gas medium to ensure that the gas medium is in a dry state.

[0058] The water vapor in the gas medium in the gas transmission pipeline 4 is condensed by the cold dryer 7 to reduce the moisture content in the gas medium. After the water vapor in the gas medium is condensed, the gas-liquid separator 8 separates and discharges the liquid water condensed in the gas medium to further remove residual moisture, thereby ensuring that the gas medium entering the expander 1 is in a dry state, avoiding frost or ice formation in the gas medium in a low-temperature environment, and thus improving the operating stability of the turbine expander 1 during the low-temperature test.

[0059] Reference Figure 1 In some embodiments of the present application, the turbine expander testing device 100 may further include: a filter 9, which is arranged in the gas pipeline 4. Along the gas transmission direction of the gas pipeline 4, the filter 9 is located on the upstream side of the heat exchanger 6. The filter 9 is used to filter impurities in the gas medium in the gas pipeline 4.

[0060] When the gas medium in the gas pipeline 4 flows into the filter 9, the filter 9 filters and intercepts solid particles, oil mist or other tiny impurities in the gas medium to remove impurities in the gas medium in the gas pipeline 4, so that the gas medium remains clean before entering the heat exchanger 6, the cold dryer 7, the gas-liquid separator 8 and the expander 1.

[0061] The filter 9 filters and intercepts impurities in the gas medium, thereby preventing impurity particles from entering the expander 1 and causing blockage or wear, thereby improving the stability of the turbine expander testing device 100 during long-term operation and the service life of core components.

[0062] In some specific embodiments, the filter 9 may be a particle filter, an oil removal filter, or the like.

[0063] Reference Figure 1 In some embodiments of the present application, the turbine expander testing device 100 may further include: a first bypass 10, a first temperature detecting element 11, a first control valve 12 and a controller, the first temperature detecting element 11 and the first control valve 12 are both arranged on the gas transmission pipeline 4, and along the gas transmission direction of the gas transmission pipeline 4, the first temperature detecting element 11, the first control valve 12 and the heat exchanger 6 are arranged in sequence. Specifically, the first temperature detecting element 11 is located on the upstream side of the first control valve 12, and the first control valve 12 is located on the upstream side of the heat exchanger 6.

[0064] In addition, the first bypass 10 is connected between the upstream side and the downstream side of the heat exchanger 6. The first bypass 10 and the heat exchanger 6 are independently arranged. The end of the first bypass 10 close to the first storage tank 2 is connected to the first control valve 12, and the end of the first bypass 10 away from the first storage tank 2 is connected to the gas pipeline 4, and the connection point between the first bypass 10 and the gas pipeline 4 is located on the downstream side of the heat exchanger 6.

[0065] The first control valve 12 is used to control the medium in the gas pipeline 4 to flow into the first bypass 10 or the heat exchanger 6, and the first temperature detection component 11 is used to detect the temperature of the medium in the gas pipeline 4. The first control valve 12 and the first temperature detection component 11 are both communicatively connected to the controller, and the controller is used to control the working state of the first control valve 12 according to the detection signal of the first temperature detection component 11.

[0066] The controller receives the detection signal of the first temperature detection component 11, and compares the temperature of the gas medium in the gas pipeline 4 with the preset temperature. When the temperature of the gas medium in the gas pipeline 4 is equal to the preset temperature, the controller controls the first control valve 12 to control the gas medium in the gas pipeline 4 to flow into the first bypass 10, and the gas medium in the first bypass 10 flows into the gas pipeline 4 to bypass the heat exchanger 6. When the temperature of the gas medium in the gas pipeline 4 is lower than the preset temperature, the controller controls the first control valve 12 to control the gas medium in the gas pipeline 4 to flow into the heat exchanger 6, and the heat exchanger 6 heats the gas medium in the gas pipeline 4.

[0067] The controller receives the detection signal of the first temperature detection component 11 and compares the temperature of the gas medium in the gas pipeline 4 with the preset temperature. When the temperature of the gas medium is equal to the preset temperature, the first control valve 12 controls the gas medium to flow into the first bypass 10. When the temperature of the gas medium is lower than the preset temperature, the first control valve 12 controls the gas medium to flow into the heat exchanger 6 and the heat exchanger 6 heats the gas medium, thereby adjusting the temperature of the gas medium in the gas pipeline 4 to avoid the temperature of the gas medium in the gas pipeline 4 being too low to affect the normal operation of the expander 1, thereby improving the automatic control capability of the turbine expander testing device 100.

[0068] In some specific embodiments, the first temperature detecting element 11 may be a thermocouple or an infrared temperature sensor, and the first control valve 12 may be a three-way solenoid valve.

[0069] Reference Figure 1 In some embodiments of the present application, the turbine expander testing device 100 may further include: a heater 13, which is arranged in the gas pipeline 4. Along the gas transmission direction of the gas pipeline 4, the heater 13 is located on the downstream side of the heat exchanger 6, and the heater 13 is used to heat the gas medium in the gas pipeline 4.

[0070] After the gas medium in the gas pipeline 4 undergoes heat exchange with the gas in the exhaust pipeline 5 in the heat exchanger 6, the gas medium in the gas pipeline 4 continues to flow along the gas pipeline 4 to the heater 13. The heater 13 further heats the gas medium in the gas pipeline 4 to increase the temperature of the gas medium so that the temperature of the gas medium in the gas pipeline 4 reaches a preset temperature, thereby ensuring that the gas medium can meet the test temperature requirements before entering the expander 1.

[0071] The gas medium in the gas pipeline 4 is further heated by the heater 13 so that the temperature of the gas medium continues to increase after the initial heat exchange in the heat exchanger 6, thereby ensuring that the gas medium meets the test temperature requirements before entering the expander 1, thereby improving the temperature adaptability of the turbine expander test device 100.

[0072] In some specific embodiments, the heater 13 may be a resistance heater or a steam heater.

[0073] Reference Figure 1 In some embodiments of the present application, the turbine expander testing device 100 may further include: a second bypass 14, a second temperature detecting element 15, a second control valve 16 and a controller. The second temperature detecting element 15 and the second control valve 16 are both arranged on the gas transmission pipeline 4. Along the gas transmission direction of the gas transmission pipeline 4, the heat exchanger 6, the second temperature detecting element 15, the second control valve 16 and the heater 13 are arranged in sequence. Specifically, the second temperature detecting element 15 is located on the upstream side of the second control valve 16, and the second control valve 16 is located on the upstream side of the heater 13.

[0074] The second bypass 14 is connected between the upstream side and the downstream side of the heater 13. The second bypass 14 and the heater 13 are independently arranged. The end of the second bypass 14 close to the first storage tank 2 is connected to the second control valve 16, and the end of the second bypass 14 away from the first storage tank 2 is connected to the gas pipeline 4, and the connection point between the second bypass 14 and the gas pipeline 4 is located on the downstream side of the heater 13.

[0075] The second control valve 16 is used to control the medium in the gas pipeline 4 to flow into the second bypass 14 or the heater 13, and the second temperature detection component 15 is used to detect the temperature of the medium in the gas pipeline 4. The second control valve 16 and the second temperature detection component 15 are both communicatively connected to the controller, and the controller is used to control the working state of the second control valve 16 according to the detection signal of the second temperature detection component 15.

[0076] The controller receives the detection signal of the second temperature detection component 15, and compares the temperature of the gas medium in the gas pipeline 4 with the preset temperature. When the temperature of the gas medium in the gas pipeline 4 is equal to the preset temperature, the controller controls the second control valve 16 to control the gas medium in the gas pipeline 4 to flow into the second bypass 14, and the gas medium in the second bypass 14 flows into the gas pipeline 4 to bypass the heater 13. When the temperature of the gas medium in the gas pipeline 4 is lower than the preset temperature, the controller controls the second control valve 16 to control the gas medium in the gas pipeline 4 to flow into the heater 13, and the heater 13 heats the gas medium in the gas pipeline 4.

[0077] The controller receives the detection signal of the second temperature detection component 15 and compares the temperature of the gas medium in the gas pipeline 4 with the preset temperature. When the temperature of the gas medium is equal to the preset temperature, the second control valve 16 controls the gas medium to flow into the second bypass 14. When the temperature of the gas medium is lower than the preset temperature, the second control valve 16 controls the gas medium to flow into the heater 13 and the heater 13 heats the gas medium, thereby adjusting the temperature of the gas medium in the gas pipeline 4 to avoid the temperature of the gas medium in the gas pipeline 4 being too low and affecting the normal operation of the expander 1, thereby improving the automatic control capability of the turbine expander testing device 100.

[0078] In some specific embodiments, the second temperature detecting element 15 may be a thermocouple or an infrared temperature sensor, and the second control valve 16 may be a three-way solenoid valve.

[0079] Based on this, the present application further discloses a turbine expander testing system. According to an embodiment of the present application, the turbine expander testing system includes: a turbine expander testing device 100, and the turbine expander testing device 100 is the turbine expander testing device 100 of the above embodiment.

[0080] According to the turboexpander testing system of an embodiment of the present application, a first medium is delivered to a gas pipeline 4 at a first preset flow rate via a first storage tank 2, and a second medium is delivered to the gas pipeline 4 at a second preset flow rate via a second storage tank 3. The first medium and the second medium are mixed within the gas pipeline 4. The temperature of the gas medium within the gas pipeline 4 is controlled by adjusting the first preset flow rate and the second preset flow rate to deliver gas of different temperatures to the expander 1. Compared to the prior art, flexible adjustment of gas temperature can be achieved without frequently replacing gas storage tanks with different temperatures, thereby improving the testing efficiency of the turboexpander 1.

[0081] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A turboexpander testing device, characterized in that: include: expander (1); A first storage tank (2) and a second storage tank (3), wherein the first storage tank (2) is used to store a first medium at a first preset temperature, and the second storage tank (3) is used to store a second medium at a second preset temperature, wherein the first preset temperature is not equal to the second preset temperature; a gas transmission pipeline (4), one end of the gas transmission pipeline (4) being in communication with both the first storage tank (2) and the second storage tank (3), and the other end being in communication with the gas inlet end of the expander (1); the first storage tank (2) being used to deliver the first medium to the gas transmission pipeline (4) at a first preset flow rate; the second storage tank (3) being used to deliver the second medium to the gas transmission pipeline (4) at a second preset flow rate; the first medium and the second medium being mixed in the gas transmission pipeline (4); an exhaust pipe (5), the exhaust pipe (5) being in communication with an exhaust end of the expander (1); a heat exchanger (6), wherein the gas supply pipeline (4) and the exhaust pipeline (5) both pass through the heat exchanger (6), and the gas supply pipeline (4) exchanges heat with the exhaust pipeline (5) through the heat exchanger (6); The gas transmission pipeline (4) comprises a first branch (41), a second branch (42) and a mixing pipeline (43); the mixing pipeline (43) is connected to the gas inlet end of the expander (1); the first branch (41) is connected between the mixing pipeline and the first storage tank (2); the first branch (41) is provided with a first regulating valve (411); the first regulating valve (411) is used to regulate the flow of the first medium; the second branch (42) is connected between the mixing pipeline and the second storage tank (3); the second branch (42) is provided with a second regulating valve (421); the second regulating valve (421) is used to regulate the flow of the second medium.

2. A turboexpander testing device according to claim 1, characterized in that: Also includes: A cold dryer (7) and a gas-liquid separator (8), wherein the cold dryer (7) and the gas-liquid separator (8) are both arranged on the gas transmission pipeline (4); along the gas transmission direction of the gas transmission pipeline (4), the cold dryer (7) is located on the downstream side of the heat exchanger (6), and the gas-liquid separator (8) is located on the downstream side of the cold dryer (7).

3. A turboexpander testing device according to claim 1, characterized in that: Also includes: A filter (9) is provided on the gas transmission pipeline (4), and along the gas transmission direction of the gas transmission pipeline (4), the filter (9) is located on the upstream side of the heat exchanger (6).

4. A turboexpander testing device according to claim 1, characterized in that: Also includes: A first bypass (10), a first temperature detecting element (11), a first control valve (12) and a controller, wherein the first temperature detecting element (11) and the first control valve (12) are both arranged on the gas transmission pipeline (4), and along the gas transmission direction of the gas transmission pipeline (4), the first temperature detecting element (11), the first control valve (12) and the heat exchanger (6) are arranged in sequence, the first bypass (10) is connected between the upstream side and the downstream side of the heat exchanger (6), and the first bypass (10) and the heat exchanger (6) are independently arranged. The first bypass (10) is connected to the first control valve (12), and the first control valve (12) is used to control the medium in the gas pipeline (4) to flow into the first bypass (10) or the heat exchanger (6). The first temperature detection element (11) is used to detect the temperature of the medium in the gas pipeline (4). The first control valve (12) and the first temperature detection element (11) are both communicatively connected to the controller, and the controller is used to control the working state of the first control valve (12) according to the detection signal of the first temperature detection element (11).

5. The turboexpander testing device according to claim 1, characterized in that: Also includes: A heater (13) is provided on the gas transmission pipeline (4), and along the gas transmission direction of the gas transmission pipeline (4), the heater (13) is located on the downstream side of the heat exchanger (6).

6. A turboexpander testing device according to claim 5, characterized in that: Also includes: A second bypass (14), a second temperature detecting element (15), a second control valve (16) and a controller, wherein the second temperature detecting element (15) and the second control valve (16) are both arranged on the gas transmission pipeline (4), and along the gas transmission direction of the gas transmission pipeline (4), the heat exchanger (6), the second temperature detecting element (15), the second control valve (16) and the heater (13) are arranged in sequence, the second bypass (14) is connected between the upstream side and the downstream side of the heater (13), and the second bypass (14) and the heater (13) are connected. The second bypass (14) and the second control valve (16) are independently arranged, the second bypass (14) is connected to the second control valve (16), the second control valve (16) is used to control the medium in the gas pipeline (4) to flow into the second bypass (14) or the heater (13), the second temperature detection element (15) is used to detect the temperature of the medium in the gas pipeline (4), the second control valve (16) and the second temperature detection element (15) are both connected to the controller for communication, and the controller is used to control the working state of the second control valve (16) according to the detection signal of the second temperature detection element (15).

7. A turboexpander testing system, characterized in that: include: A turbine expander test device (100), wherein the turbine expander test device (100) is the turbine expander test device (100) according to any one of claims 1 to 6.

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