A steam compressor test system and a test method

Abstract

The present application discloses a steam compressor test system, which includes a steam compressor, a steam storage device, a regulation device, a detection device, and a control device. The regulation device is used to regulate the operating parameters of the first pipeline, the second pipeline, and the third pipeline. The detection device includes a first detector, a second detector, and a third detector, which are respectively used to detect the operating conditions of the first pipeline, the flash evaporation device, and the third pipeline. The detection device is also used to detect the multiple system operating energy efficiencies of the steam compressor under different operating conditions of the first pipeline, the flash evaporation device, and the third pipeline. The present application can simulate different operating conditions of the steam compressor, thereby testing the performance of the steam compressor, determining the optimal operating condition of the steam compressor, and achieving the optimal energy-saving effect of the system.

Description

Technical Field

[0001] This application belongs to the technical field of steam compression, and particularly relates to a water vapor compressor test system and a test method. Background Art

[0002] At present, the steam recompression technology with water as the working medium is an energy-saving technology that has developed rapidly in recent years. It can not only recover industrial waste heat, but also replace traditional boiler steam with compressed steam, which is both energy-saving and environmentally friendly. Compared with traditional boiler steam, whether it is an electric boiler or a gas boiler, the energy efficiency of the water vapor compression technology has a significant improvement. This is the reason for the energy-saving of the water vapor compression technology and also the reason for its widespread use.

[0003] In a water vapor compressor system, a flash evaporation device is installed before the inlet of the compressor, which mainly generates low-pressure steam. A steam storage device is installed after the outlet of the compressor. The steam storage device is used to store the high-temperature steam generated by the compressor, and at the same time, it can also eliminate the pulse of the exhaust pipe and play a role in buffering and stabilizing the pressure.

[0004] When the operating parameters of the water vapor compressor system are different, the energy-saving effect is different. Therefore, it is necessary to develop a water vapor compressor test system for testing the water vapor compressor to obtain the optimal operating conditions of the water vapor compressor and achieve the optimal energy-saving effect of the system. Summary of the Invention

[0005] To solve the deficiencies of the existing technology, this application provides a water vapor compressor test system and a test method, aiming to determine the target operating parameters of the water vapor compressor, so as to operate under better conditions and achieve better energy-saving effects.

[0006] The technical effects to be achieved by this application are realized through the following solutions:

[0007] In the first aspect, this application provides a water vapor compressor test system, including:

[0008] A water vapor compressor, including a first inlet, a second inlet, and a first outlet;

[0009] A steam storage device, including a third inlet and a second outlet, and the third inlet is connected to the first outlet through a first pipeline;

[0010] A flash evaporation device, including a fourth inlet and a third outlet, the fourth inlet is connected to the second outlet through a second pipeline, and the third outlet is connected to the first inlet through a third pipeline;

[0011] A regulating device for regulating the operating parameters of the first pipeline, the operating parameters of the second pipeline, and the operating parameters of the third pipeline;

[0012] A detection device, including a first detector, a second detector, and a third detector. The first detector is arranged on the first pipeline for detecting the operating condition of the first pipeline; the second detector is arranged on the flash evaporation device for detecting the operating condition of the flash evaporation device; the third detector is arranged on the third pipeline for detecting the operating condition of the third pipeline. The detection device is also used for detecting the multiple system operating energy efficiencies of the steam compressor under different operating conditions in the first pipeline, the flash evaporation device, and the third pipeline;

[0013] A control device for determining a target energy efficiency and target operating parameters according to the multiple system operating energy efficiencies.

[0014] Optionally, the regulating device includes a first control valve, the first control valve is connected to the second inlet, and the first control valve is used for controlling the water inlet flow rate of the second inlet; and / or

[0015] The steam compressor test system is provided with a steam discharge port, the steam discharge port is connected to the second pipeline through a first discharge pipeline, and the regulating device includes a second control valve, the second control valve is arranged on the first discharge pipeline for controlling the exhaust gas volume of the steam discharge port; and / or

[0016] The steam compressor test system is provided with a fourth pipeline, one end of the fourth pipeline is connected to the second outlet, and the other end is connected to the third pipeline. The regulating device includes a third control valve, the third control valve is arranged on the fourth pipeline for controlling the gas pressure delivered from the fourth pipeline to the third pipeline.

[0017] Optionally, the control device is connected to the detection device and communicatively connected to at least one of the first control valve, the second control valve, and the third control valve.

[0018] Optionally, the first control valve is communicatively connected to the first detector; and / or

[0019] The second control valve is communicatively connected to the second detector; and / or

[0020] The third control valve is communicatively connected to the third detector.

[0021] Optionally, the water vapor compressor test system is provided with a bypass pipeline. One end of the bypass pipeline is connected to the third pipeline, and the other end is connected to the third inlet. The regulating device includes a bypass valve, and the bypass pipeline is provided with a safety valve. Both the bypass valve and the safety valve are arranged on the bypass pipeline, and the bypass valve is communicatively connected to the first detector.

[0022] Optionally, the bypass valve and the safety valve are connected in parallel.

[0023] Optionally, the detection device includes a fourth detector. The fourth detector is arranged in the steam storage device. The steam storage device is provided with a fourth outlet, and the fourth detector is used to detect the liquid level of the steam storage device.

[0024] The water vapor compressor test system is provided with a first sewage outlet, and the first sewage outlet is connected to the fourth outlet through a second discharge pipeline.

[0025] The regulating device is provided with a fourth control valve. The fourth control valve is arranged on the second discharge pipeline and is used to control the water flow rate of the second discharge pipeline. The fourth control valve is communicatively connected to the fourth detector.

[0026] Optionally, the detection device includes a fifth detector. The fifth detector is arranged in the steam storage device and is used to detect the operating condition of the steam storage device.

[0027] The regulating device is provided with a fifth control valve. The fifth control valve is arranged on the second pipeline and is arranged near the second outlet and is used to control the air intake volume of the second pipeline. The fifth control valve is communicatively connected to the fifth detector.

[0028] Optionally, the detection device includes a sixth detector. The sixth detector is arranged in the flash evaporation device. The flash evaporation device is provided with a fifth outlet, and the sixth detector is used to detect the liquid level of the flash evaporation device.

[0029] The water vapor compressor test system is provided with a second sewage outlet, and the second sewage outlet is connected to the fifth outlet through a third discharge pipeline.

[0030] The regulating device is provided with a sixth control valve. The sixth control valve is arranged on the third discharge pipeline and is used to control the water flow rate of the third discharge pipeline. The sixth control valve is communicatively connected to the sixth detector.

[0031] Optionally, the water vapor compressor test system is provided with a water supply port. The water supply port is provided with a water pump, and the water pump is connected to the fifth outlet through a first make-up water pipeline.

[0032] The control device is provided with a seventh control valve, which is arranged on the first water supply pipeline, and the seventh control valve is communicatively connected to the second detector and the sixth detector respectively. The seventh control valve is used to control the water flow rate of the first water supply pipeline.

[0033] Optionally, the water pump is connected to the second inlet and is used to supply liquid to the steam compressor.

[0034] In a second aspect, the present application provides a test method for a steam compressor test system, and the test method is applied to the steam compressor test system according to any one of the first aspects.

[0035] Optionally, the test method includes:

[0036] Adjusting the operating parameters of the first pipeline, adjusting the operating parameters of the second pipeline, and adjusting the operating parameters of the third pipeline;

[0037] Detecting the operating conditions of the first pipeline, detecting the operating conditions of the flash evaporation device, and detecting the operating conditions of the third pipeline. The detection device is also used to detect the multiple system operating energy efficiencies of the steam compressor under different operating conditions in the first pipeline, the flash evaporation device, and the third pipeline;

[0038] Determining the target energy efficiency and target operating parameters according to the multiple system operating energy efficiencies.

[0039] Compared with the prior art, the beneficial effect of the present application is that the steam compressor test system described herein can simulate different working conditions of the steam compressor operation, thereby testing the performance of the steam compressor, determining the optimal working condition of the steam compressor operation, and achieving the optimal energy-saving effect of the system. Specifically, by adjusting the operating parameters of the first pipeline, the second pipeline, and the third pipeline, the relatively optimal energy efficiency, that is, the target energy efficiency, under different operating conditions of the first pipeline, the flash evaporation device, and the third pipeline is determined. When the first pipeline, the flash evaporation device, and the third pipeline operate with the target operating parameters corresponding to the target energy efficiency, a relatively optimal energy-saving effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the existing technical solutions, the following will briefly introduce the drawings required for the description of the embodiments or the existing technical solutions. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a schematic structural diagram of a steam compressor test system according to an embodiment of the present application;

[0042] Figure 2 The flowchart of the test method for the steam compressor test system in an embodiment of the present application.

[0043] Explanation of the reference numerals in the drawings: 1. Steam compressor; 11. First inlet; 12. Second inlet; 13. First outlet; 2. Steam storage device; 21. Third inlet; 22. Second outlet; 23. Fourth outlet; 101. First pipeline; 102. Second pipeline; 103. Third pipeline; 104. First discharge pipeline; 105. Fourth pipeline; 106. Bypass pipeline; 107. Second discharge pipeline; 108. Third discharge pipeline; 109. First water supply pipeline; 201. Steam discharge port; 202. First sewage discharge port; 203. Water supply port; 2031. Water pump; 204. Second sewage discharge port; 301. Safety valve; 3. Flash evaporation device; 31. Fourth inlet; 32. Third outlet; 33. Fifth outlet; 41. First detector; 42. Second detector; 43. Third detector; 44. Fourth detector; 45. Fifth detector; 46. Sixth detector; 51. First control valve; 52. Second control valve; 53. Third control valve; 54. Bypass valve; 55. Fourth control valve; 56. Fifth control valve; 57. Sixth control valve; 58. Seventh control valve. Detailed implementation manners

[0044] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments and the corresponding drawings. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] In a steam compressor system, a flash evaporation device is installed before the air inlet of the compressor, and this flash evaporation device mainly generates low-pressure steam. A steam storage device is installed after the air outlet of the compressor, and this steam storage device is used to store the high-temperature steam generated by the compressor. At the same time, it can also eliminate the pulse of the exhaust pipeline and play a role in buffering and stabilizing the pressure. When the operating parameters of the steam compressor system are different, the energy-saving effect is different. However, in the related art, the operating parameters of the steam compressor system are set, and it is impossible to determine the optimal operating conditions when the steam compressor system actually operates, nor can an optimal energy-saving effect be achieved.

[0046] The present application proposes a steam compressor test system, aiming to determine the target operating parameters of the steam compressor, so as to operate under optimal conditions and achieve an optimal energy-saving effect.

[0047] The following will describe the implementation manners of the present application in detail with reference to the drawings.

[0048] Figure 1 This is a schematic structural diagram of a steam compressor test system in an embodiment of the present application. As can be seen from the attached drawings, the steam compressor test system includes a steam compressor 1, a steam storage device 2, a flash evaporation device 3, a detection device, and a control device. The steam compressor 1 is used to generate high-temperature steam. The steam storage device 2 is used to store the high-temperature steam generated by the steam compressor 1 on the one hand, and on the other hand, to eliminate the pulse in the pipeline when discharging steam, playing a role in buffering and stabilizing the pressure. The flash evaporation device 3 is used to provide low-temperature and low-pressure steam for the steam compressor 1. Hereinafter, the steam compressor test system takes a twin-screw steam compressor test system as an example, but it does not limit the specific type of the steam compressor test system.

[0049] The steam compressor 1 includes a first inlet 11, a second inlet 12, and a first outlet 13. The low-temperature and low-pressure steam generated by the flash evaporation device 3 enters the steam compressor 1 from the first inlet 11. The second inlet 12 is used to replenish water for the steam compressor 1.

[0050] The steam storage device 2 includes a third inlet 21 and a second outlet 22. The third inlet 21 is connected to the first outlet 13 through a first pipeline 101. The high-temperature steam generated by the steam compressor 1 is transported to the steam storage device 2 through the first pipeline 101. The steam storage device 2 stores the high-temperature and high-pressure steam, and after stabilizing the pressure and temperature of the steam, discharges it from the steam compressor test system. The steam discharged from the steam compressor test system can be used as the power of external equipment to drive the external equipment to work.

[0051] The flash evaporation device 3 includes a fourth inlet 31 and a third outlet 32. The fourth inlet 31 is connected to the second outlet 22 through a second pipeline 102, and the third outlet 32 is connected to the first inlet 11 through a third pipeline 103. Part of the steam of the steam storage device 2 is transported to the flash evaporation device 3, and the flash evaporation device 3 generates low-temperature and low-pressure steam to transport the low-temperature and low-pressure steam to the steam compressor 1.

[0052] The control device is used to adjust the operating parameters of the first pipeline 101, the operating parameters of the second pipeline 102, and the operating parameters of the third pipeline 103. The operating parameters include pressure, flow rate, and temperature. It can be understood that the first pipeline 101 is a pipeline for delivering high-temperature steam to the steam storage device 2. By adjusting the operating parameters of the first pipeline 101, the operating conditions of the steam storage device 2 can be adjusted. Moreover, the first pipeline 101 is the discharge pipeline of the steam compressor 1. Adjusting the operating parameters of the first pipeline 101 can be achieved by adjusting the operating conditions of the steam compressor 1. Similarly, the second pipeline 102 is a pipeline for delivering high-temperature steam to the flash evaporation device 3. By adjusting the operating parameters of the second pipeline 102, the operating conditions of the flash evaporation device 3 can be adjusted. The third pipeline 103 is a pipeline for delivering low-temperature and low-pressure steam to the steam storage device 2. By adjusting the operating parameters of the third pipeline 103, the operating conditions of the steam storage device 2 can be adjusted. Thus, the operation of the steam storage device 2, the flash evaporation device 3, and the steam storage device 2 under different operating conditions can be simulated, and then the energy-saving effect of the steam compressor can be tested.

[0053] The control device is used to determine the target energy efficiency and the target operating parameters according to the energy efficiencies of multiple system operations. The control device is connected to the control device and the detection device, and controls the control device and the detection device. The target operating energy efficiency is one or more of the higher energy efficiencies among the energy efficiencies of multiple system operations. The target operating parameters are the operating parameters of the steam compressor corresponding to the target operating energy efficiency.

[0054] Understandably, the control device has the function of controlling the operating parameters of the first pipeline 101, the second pipeline 102, and the third pipeline 103. However, the control device cannot detect the operating parameters of the first pipeline 101, the flash evaporation device 3, and the third pipeline 103, that is, the control device can increase or decrease the operating parameters. The detection device includes a first detector 41, a second detector 42, and a third detector 43. The first detector 41 is arranged on the first pipeline 101 and is used to detect the operating condition of the first pipeline 101, that is, the actual operating parameters of the first pipeline 101. The second detector 42 is arranged on the flash evaporation device 3 and is used to detect the operating condition of the flash evaporation device 3, that is, the actual operating parameters of the flash evaporation device 3. The third detector 43 is arranged on the third pipeline 103 and is used to detect the operating condition of the third pipeline 103, that is, the actual operating parameters of the third pipeline 103, and to detect the multiple system operating energy efficiencies of the steam compressor under different operating conditions of the first pipeline, the flash evaporation device, and the third pipeline. By controlling the operating parameters of the first pipeline, the second pipeline, and the third pipeline, the optimal energy efficiency, that is, the target energy efficiency, under different operating conditions of the first pipeline, the second pipeline, and the third pipeline is determined. When the first pipeline, the flash evaporation device, and the third pipeline operate with the target operating parameters corresponding to the target energy efficiency, a better energy-saving effect can be achieved. The energy efficiency can be the compression ratio of the steam compressor. Understandably, the detection device can include detection equipment for detecting the temperature, flow rate (including gas flow rate and liquid flow rate), and pressure of the pipeline, and detection equipment for detecting the energy efficiency of the steam compressor. Exemplarily, the first detector 41, the second detector 42, and the third detector 43 can all include a remote pressure transmitter, a local pressure gauge, a local thermometer, and a remote temperature transmitter.

[0055] In an embodiment, the control device includes a first control valve 51. The first control valve 51 is connected to the second inlet 12, and the first control valve 51 is used to control the water inlet flow rate of the second inlet 12. Exemplarily, the first control valve 51 is a water spray solenoid valve, which controls the water inlet flow rate of the second inlet 12, thereby controlling the water supply amount to the steam compressor 1. Furthermore, by spraying water through the water spray solenoid valve, the exhaust temperature of the steam compressor 1 can be adjusted, that is, the exhaust temperature of the first pipeline 101 can be adjusted.

[0056] In one embodiment, the steam compressor test system is provided with a steam discharge port 201. The steam discharge port 201 is connected to the second pipeline 102 through the first discharge pipeline 104. The control device includes a second control valve 52. The second control valve 52 is arranged on the first discharge pipeline 104 and is used to control the exhaust volume of the steam discharge port 201. Exemplarily, the second control valve 52 is a temperature control regulating valve. By means of the second control valve 52, the high-temperature and high-pressure steam entering the flash evaporation device 3 can be controlled, and thus the water temperature of the flash evaporation device 3 can be adjusted, so as to adjust the intake air temperature of the steam compressor 1. Specifically, the first discharge pipeline 104 diverts the high-temperature and high-pressure steam of the second pipeline 102. When the temperature of the flash evaporation device 3 is relatively high, the second control valve 52 controls the increase of the exhaust volume of the first discharge pipeline 104, so as to reduce the high-temperature and high-pressure steam entering the flash evaporation device 3, and thus the water temperature of the flash evaporation device 3 can be reduced. On the contrary, the water temperature of the flash evaporation device 3 can be increased.

[0057] In one embodiment, the steam compressor test system is provided with a fourth pipeline 105. One end of the fourth pipeline 105 is connected to the second outlet 22, and the other end is connected to the third pipeline 103. The control device includes a third control valve 53. The third control valve 53 is arranged on the fourth pipeline 105 and is used to control the gas pressure conveyed by the fourth pipeline 105 to the third pipeline 103. The fourth pipeline 105 conveys part of the high-temperature and high-pressure steam discharged from the second outlet 22 to the third pipeline 103. The temperature and / or pressure of the third pipeline 103 can be adjusted through the third control valve 53. Exemplarily, the third control valve 53 is a pressure reducing valve. By means of the pressure reducing valve, the intake air pressure of the third pipeline 103 can be adjusted, that is, the intake air pressure of the steam compressor 1 can be adjusted, and thus the operating condition of the steam compressor 1 can be changed, so that the operating condition of the steam compressor 1 is within a preset range, thereby achieving a better energy-saving effect. The third control valve is in linkage control with the steam pressure of the third pipeline. A blowdown valve is arranged after the pressure reducing valve to discharge the condensed water after the system is depressurized.

[0058] In one embodiment, in order to better control the first control valve 51, the second control valve 52, the third control valve 53, etc., the control device is connected to the detection device and is communicatively connected to at least one of the first control valve 51, the second control valve 52, and the third control valve 53. The control device can control the corresponding control valve according to the operating condition detected by the detection device, so as to realize the regulation of the operating condition of the steam compressor test system.

[0059] In another embodiment, the first control valve 51 can be communicatively connected to the first detector 41. After the first detector 41 detects the operating condition of the first pipeline 101, it sends the operating condition to the first control valve 51. The first control valve 51 adjusts the water intake of the steam compressor 1 according to the operating condition of the first pipeline 101, so as to adjust the exhaust temperature of the steam compressor 1, that is, to adjust the gas temperature in the first pipeline 101.

[0060] Similarly, the second control valve 52 is communicatively connected to the second detector 42. After the second detector 42 detects the operating condition of the flash evaporation device 3, it sends the operating condition to the second control valve 52, and the second control valve 52 adjusts the water temperature of the flash evaporation device 3 according to the operating condition of the flash evaporation device 3, thereby adjusting the intake air temperature of the steam compressor 1.

[0061] Similarly, the third control valve 53 is communicatively connected to the third detector 43. After the third detector 43 detects the operating condition of the third pipeline 103, it sends the operating condition to the third control valve 53, and the third control valve 53 adjusts the intake air pressure of the steam compressor 1 according to the operating condition of the third pipeline 103.

[0062] In one embodiment, the steam compressor test system is provided with a bypass pipeline 106. One end of the bypass pipeline 106 is connected to the third pipeline 103, and the other end is connected to the third inlet 21. The control device includes a bypass valve 54, and a safety valve 301 is provided on the bypass pipeline 106. The bypass valve 54 and the safety valve 301 are both arranged on the bypass pipeline 106, and the bypass valve 54 is communicatively connected to the first detector 41. The bypass valve 54 determines whether to open according to the temperature and pressure detected by the first detector 41, that is, the bypass valve 54 opens according to a preset bypass pressure, and the safety valve 301 opens according to a preset popping pressure. When the exhaust pressure of the first pipeline is too high, the bypass valve or the safety valve is opened to guide the exhaust pressure of the first pipeline to the first inlet, which can play a role in pressure balance.

[0063] Exemplarily, the bypass valve 54 and the safety valve 301 are connected in parallel, so that the bypass pipeline 106 can be opened through the bypass valve 54 and the safety valve 301.

[0064] In one embodiment, the detection device includes a fourth detector 44. The fourth detector 44 is arranged in the steam storage device 2. The steam storage device 2 is provided with a fourth outlet 23, and the fourth detector 44 is used to detect the liquid level of the steam storage device 2. Exemplarily, the fourth detector 44 is a liquid level detector. The steam compressor test system is provided with a first sewage outlet 202, and the first sewage outlet 202 is connected to the fourth outlet 23 through a second discharge pipeline 107; the control device is provided with a fourth control valve 55. The fourth control valve 55 is arranged on the second discharge pipeline 107 to control the water flow rate of the second discharge pipeline 107, and the fourth control valve is communicatively connected to the fourth detector 44. The fourth detector 44 is linked with the liquid level of the steam storage device, that is, when the fourth detector 44 detects that the liquid in the steam storage device 2 reaches a preset liquid level, the fourth control valve 55 is controlled to open, so as to discharge the liquid in the steam storage device 2 through the second discharge pipeline 107 to reduce the liquid level of the liquid in the steam storage device 2. Exemplarily, a preset drainage liquid level can be set. When discharging the liquid in the steam storage device 2, when the liquid level of the liquid in the steam storage device 2 is lower than or equal to the preset drainage liquid level, the fourth control valve 55 is closed.

[0065] In one embodiment, the detection device includes a fifth detector 45 disposed in the steam storage device 2 for detecting the operating condition of the steam storage device 2. The control device is provided with a fifth control valve 56 disposed in the second pipeline 102 and near the second outlet 22 for controlling the intake air volume of the second pipeline 102. The fifth control valve 56 is communicatively connected to the fifth detector 45. The operating condition includes operating power, temperature, pressure, etc. Exemplarily, the opening degree of the fifth detection valve 56 is linked to the pressure of the steam storage device, that is, when the fifth detector 45 detects that the temperature of the steam storage device 2 is greater than the preset temperature and / or the pressure is greater than the preset pressure, the fifth control valve 56 is controlled to open or the opening degree of the fifth control valve 56 is increased to increase the gas flow rate in the second pipeline 102, thereby reducing the pressure and / or temperature of the steam storage device 2. The fifth detector 45 may include a remote pressure transmitter, a local pressure gauge, a local thermometer, and a remote temperature transmitter. Exemplarily, the fifth control valve 56 is a steam discharge valve.

[0066] In one embodiment, the detection device includes a sixth detector 46 disposed in the flash evaporation device 3. The flash evaporation device 3 is provided with a fifth outlet 33, and the sixth detector 46 is used for detecting the liquid level of the flash evaporation device 3. The steam compressor test system is provided with a second sewage outlet 204, and the second sewage outlet 204 is connected to the fifth outlet 33 through a third discharge pipeline 108. The control device is provided with a sixth control valve 57 disposed in the third discharge pipeline 108 for controlling the water discharge flow rate of the third discharge pipeline 108. The sixth control valve is communicatively connected to the sixth detector 46. When the sixth detector 46 detects that the liquid in the flash evaporation device 3 reaches the preset liquid level, the sixth control valve 57 is controlled to open, so as to discharge the liquid in the flash evaporation device 3 through the third discharge pipeline 108 to reduce the liquid level in the flash evaporation device 3. Exemplarily, a preset drainage liquid level may be set. When discharging the liquid in the flash evaporation device 3, when the liquid level in the flash evaporation device 3 is lower than or equal to the preset drainage liquid level, the sixth control valve 57 is closed.

[0067] In one embodiment, the water vapor compressor test system is provided with a water supply port 203. The water supply port 203 is provided with a water pump 2031. The water pump 2031 is connected to the fifth outlet 33 through a first make-up water pipeline 109. The flash evaporation device 3 can be replenished with water through the first make-up water pipeline 109. The control device is provided with a seventh control valve 58. The seventh control valve 58 is arranged on the first make-up water pipeline 109 and is respectively communicatively connected to a second detector 42 and a sixth detector 46. The seventh control valve 58 is used to control the water flow rate of the first make-up water pipeline 109. Exemplarily, the opening of the seventh control valve 58 is also linked to the temperature of the flash evaporation device. When the second detector 42 detects that the temperature in the flash evaporation device 3 is relatively high, the seventh control valve 58 can be opened so that the water pumped by the water pump 2031 at the water supply port 203 enters the flash evaporation device 3 through the first make-up water pipeline 109, thereby reducing the temperature of the flash evaporation device 3. Or when the sixth detector 46 detects that the liquid level in the flash evaporation device 3 is relatively low, the seventh control valve 58 can be controlled to open so that the water pumped by the water pump 2031 at the water supply port 203 enters the flash evaporation device 3 through the first make-up water pipeline 109, thereby replenishing water to the flash evaporation device 3. Since both the third discharge pipeline 108 and the first make-up water pipeline 109 are connected to the fifth outlet 33, when the seventh control valve 58 is opened, the sixth control valve 57 is closed. Conversely, when the seventh control valve 58 is closed, the sixth control valve 57 determines whether to open according to the detection result of the sixth detector. When the detection result of the sixth detector shows that the liquid level of the flash memory device exceeds the preset value, the sixth control valve 57 is opened.

[0068] In one embodiment, the water pump 2031 is connected to the second inlet 12 and is used to provide liquid for the water vapor compressor 1. The water pump 2031 pumps water to replenish the water vapor compressor 1 through a pipeline.

[0069] Exemplarily, the first pipeline 101 is provided with a silencer to reduce the noise generated by the steam pulse of the first pipeline 101. The water vapor compressor 1 is driven by a driving motor. By adjusting the operating speed of the driving motor, the suction flow rate of the water vapor compressor 1 can be adjusted. A coupling is provided between the driving motor and the water vapor compressor 1. The water vapor compressor is connected to the driving motor through the coupling, and the driving motor drives the water vapor compressor to rotate, thereby compressing the water vapor. The first inlet 11 is also provided with a steam flowmeter to detect the steam flow rate at the first inlet 11. The third pipeline 103 is provided with a filter and a butterfly valve. The filter is used to filter impurities in the third pipeline 103 to prevent impurities from entering the water vapor compressor test system and affecting the operation of the water vapor compressor test system. The butterfly valve is used to control the connection or disconnection of the third pipeline 103.

[0070] Exemplarily, a check valve is provided in the second pipeline 102 to prevent the steam entering the flash evaporation device 3 from flowing back. A detector is also provided in the second pipeline 102 for detecting the temperature and pressure of the second pipeline 102.

[0071] Exemplarily, a drain port is provided in the fourth pipeline 105. The drain port is connected to the fourth pipeline 105 through a pipeline, and a drain valve is provided in this pipeline for controlling the opening or closing of this pipeline.

[0072] For example, during the test, first turn on the water pump 2031. When the sixth detector 46 detects that the liquid level in the flash evaporation device 3 is lower than the first set liquid level, the seventh control valve 58 opens and the sixth control valve 57 closes to replenish water to the flash evaporation device 3. When the water level in the flash evaporation device 3 reaches the second set liquid level, the seventh control valve 58 closes and the water replenishment stops. After opening the butterfly valve, start the drive motor to drive the steam compressor 1 to operate. The steam compressor 1 evacuates the third pipeline 103, resulting in a decrease in the pressure in the flash evaporation device 3. When the pressure drops to a certain level, the water in the flash evaporation device 3 will flash into low-temperature and low-pressure steam, enter the steam compressor 1 for compression, and the steam is heated and pressurized in the steam compressor 1 to generate steam with a higher temperature and pressure and enter the exhaust pipeline. Then, the steam is sent to the steam storage device 2 through a muffler, and the gaseous steam is discharged from the top of the steam storage device 2 and is sent back to the third pipeline 103 after being depressurized by the third control valve 53. The third control valve is linked with the pressure of the third pipeline 103 to ensure that the pressure of the mixed steam in the third pipeline 103 is near the pressure point set by the third control valve 53. The fourth control valve 55 of the steam storage device 2 is linked with the fourth detector 44. When it is detected that the liquid level in the steam storage device 2 is higher than the set liquid level, the fourth control valve 55 opens.

[0073] The fifth control valve on another path after the steam storage device 2 is linked to the pressure of the steam storage device 2. After the fifth detector 45 detects that the pressure in the steam storage device 2 reaches the set value, the fifth control valve opens, and the steam is sent to the flash evaporation device 3 to heat the low-temperature water in the flash evaporation device 3. The second control valve 52 on the first discharge pipeline 104 is controlled in a linked manner with the temperature of the flash evaporation device 3. When the second detector detects that the water temperature in the flash evaporation device 3 is lower than the set point, the opening degree of the second control valve 52 becomes smaller, and the amount of steam discharged externally decreases, so that the water temperature in the flash evaporation device 3 can be increased, and finally the set temperature of the second control valve 52 is reached; conversely, the amount of steam discharged externally increases, so that the water temperature in the flash evaporation device 3 can be decreased, and finally the set temperature of the temperature control regulating valve is also reached. If the second control valve 52 is already fully opened and the water temperature in the flash evaporation device 3 is still higher than the set temperature of the second control valve 52, since the seventh control valve 58 is also linked to the temperature of the flash evaporation device 3, when the water temperature in the flash evaporation device 3 reaches the temperature set point of the seventh control valve 58, the seventh control valve 58 is opened to supplement normal temperature water to the flash evaporation device 3 to achieve the purpose of cooling. During the operation of the steam compressor 1 test system, if it is detected that the exhaust temperature of the steam compressor 1 is too high, or the exhaust superheat degree (the value of the exhaust temperature minus the saturation temperature corresponding to the exhaust pressure) is too large, then the first control valve is opened to cool the exhaust of the steam compressor 1 to ensure the stable and reliable operation of the unit.

[0074] A steam flowmeter is installed on the third pipeline 103 before the steam compressor 1 enters, so that the suction flow rate of the steam compressor 1 can be measured. The power consumption of the steam compressor 1 can also be read through a wattmeter connected to the drive motor. The compression ratio of the compressor can be calculated by the ratio of the exhaust pressure and the suction pressure of the steam compressor 1. By adjusting the linked control of the second control valve 52 and the seventh control valve 58 on the temperature of the flash evaporation device 3, the water temperature of the flash evaporation device 3 can be adjusted, thereby adjusting the intake air temperature of the steam compressor 1; by adjusting the linked control of the pressure reducing valve on the pressure, the intake air pressure of the steam compressor 1 can be adjusted; by adjusting the linked control of the fifth control valve 56 on the pressure, the exhaust pressure of the steam compressor 1 can be adjusted; by spraying water through the first control valve, the exhaust temperature of the steam compressor 1 can be adjusted; by adjusting the operating speed of the drive motor, the suction flow rate of the compressor can be adjusted.

[0075] This application provides a test method for a steam compressor test system. The test method is applied to any of the above-mentioned steam compressor test systems. The structure and beneficial effects of the steam compressor test system have been described in detail in the above embodiments and will not be repeated here.

[0076] As attached Figure 2As shown, it is a flowchart of the test method for the steam compressor test system in this embodiment. It can be seen from the figure that the test method includes step S01 and step S02.

[0077] Step S01: Regulate the operating parameters of the first pipeline, regulate the operating parameters of the second pipeline, and regulate the operating parameters of the third pipeline.

[0078] Step S02: Detect the operating conditions of the first pipeline, detect the operating conditions of the flash evaporation device, and detect the operating conditions of the third pipeline, and detect multiple system operating energy efficiencies of the steam compressor under different operating conditions of the first pipeline, the flash evaporation device, and the third pipeline;

[0079] Step S03: Determine the target energy efficiency and target operating parameters based on the multiple system operating energy efficiencies.

[0080] Among them, the operating conditions include temperature, pressure, and flow rate (gas or liquid).

[0081] Exemplarily, regulating the operating parameters of the first pipeline 101 includes:

[0082] After the first detector 41 detects the operating conditions of the first pipeline 101, it sends the operating conditions to the first control valve 51, and the first control valve 51 adjusts the water inlet volume of the steam compressor 1 according to the operating conditions of the first pipeline 101.

[0083] Exemplarily, the control device is connected to the detection device and communicatively connected to at least one of the first control valve 51, the second control valve 52, and the third control valve 53. The control device can control the operation of the first control valve 51 according to the operating conditions detected by the first detector 41. The first control valve 51 is linked with the exhaust temperature of the steam compressor to supply water to the steam compressor, thereby reducing the exhaust temperature of the steam compressor.

[0084] Exemplarily, regulating the operating parameters of the second pipeline 102 includes:

[0085] A steam discharge port 201 is provided in the steam compressor test system. The steam discharge port 201 is connected to the second pipeline 102 through a first discharge pipeline 104. The regulating device includes a second control valve 52. The second control valve 52 is provided in the first discharge pipeline 104 and is used to control the exhaust volume of the steam discharge port 201. Exemplarily, the opening of the second control valve 52 is linked with the temperature in the flash evaporation device. The second control valve 52 is a temperature control regulating valve. The high-temperature and high-pressure steam entering the flash evaporation device 3 is controlled through the second control valve 52, and then the water temperature of the flash evaporation device 3 can be adjusted, thereby adjusting the intake temperature of the steam compressor 1;

[0086] The first discharge pipeline 104 diverts the high-temperature and high-pressure steam of the second pipeline 102. When the temperature of the flash evaporation device 3 is relatively high, the second control valve 52 controls an increase in the exhaust gas volume of the first discharge pipeline 104, thereby reducing the high-temperature and high-pressure steam entering the flash evaporation device 3, and further reducing the water temperature of the flash evaporation device 3. Conversely, the water temperature of the flash evaporation device 3 can be increased.

[0087] Exemplarily, regulating the operating parameters of the third pipeline 103 includes:

[0088] A fourth pipeline 105 is provided in the steam compressor test system. One end of the fourth pipeline 105 is connected to the second outlet 22, and the other end is connected to the third pipeline 103. The regulating device includes a third control valve 53. The third control valve 53 is provided in the fourth pipeline 105 and is used to control the gas pressure delivered from the fourth pipeline 105 to the third pipeline 103;

[0089] The fourth pipeline 105 conveys a part of the high-temperature and high-pressure steam discharged from the second outlet 22 to the third pipeline 103. The temperature and / or pressure of the third pipeline 103 can be adjusted through the third control valve 53.

[0090] In an embodiment, the preset compression ratio of the steam compressor 1 is 8. During the detection of the steam compressor test system, the water temperature of the flash evaporation device 3 is set to 85 °C, the preset pressure of the third control valve 53 is 0.47 bar, and the preset pressure of the fifth control valve 56 is 4.0 bar. Under the operating speed condition of 2500 rpm of the steam compressor 1, the saturated steam temperature of the steam generated by the flash evaporation device 3 entering the steam compressor 1 is 80 °C and the pressure is 0.47 bar. After passing through the steam compressor 1, the exhaust steam temperature is 140 °C and the steam pressure is 3.6 bar. The intake steam flow rate of the steam compressor 1 is 1000 kg / h, and the operating power of the steam compressor 1 is 250 kW. Under this condition, the compression ratio of the steam compressor 1 reaches 7.7, which is very close to the design compression ratio of the compressor, and the energy-saving effect of the steam compressor system operation is the best.

[0091] The steam compressor test system can provide high-temperature steam in the pressure range of 1.0 - 6.0 bar and the temperature range of 100 - 160 °C, and can regulate various operating conditions with a compression ratio range of 2 - 10, an intake flow rate range of 200 - 2000 kg / h, and a power range of 50 - 500 kW for the steam compressor 1.

[0092] For comparison, when testing using the existing test method, assuming that the designed flow rate of the steam compressor 1 is 1000 kg / h, the inlet temperature is 80 °C, and the heat of the saturated steam corresponding to the inlet temperature is 2.643x10^6 kJ. Electric heating is used to heat the water in the flash evaporation device to 85 °C to flash out low-pressure saturated steam at 80 °C, and the heating efficiency of the electric heating is preset to 1. When replenishing water to the flash evaporation device with water at normal temperature of 15 °C, it is necessary to heat 9 tons of water from 15 °C to 85 °C, consuming 734 degrees of electricity.

[0093] For comparison, when testing using the existing test method, an air source heat pump is used to heat the water in the flash evaporation device to flash out low-pressure saturated steam at 80 °C. At a surrounding temperature of 20 °C and an outlet water temperature of 85 °C, the COP value of the air source heat pump is preset to 2.0. The COP value is the ratio of the heating capacity to the input power. At this time, it also consumes 367 degrees of electricity. At the same time, the costs of the air source heat pump unit and auxiliary equipment need to be considered.

[0094] It can be seen from this that the steam compressor test system described in this article has no electric heating preheating, and completely uses the heat of the high-temperature steam generated by the compressor to circulate and heat the low-temperature water in the flash evaporation device, and then flashes out low-pressure steam at a higher temperature and enters the compressor for heating again, and so on in a cycle. In addition, the steam compressor test system of the present application includes a flash evaporation device and a steam storage device, and the steam storage device can establish a back pressure to achieve steam at a higher pressure. After steam storage, a part of the steam is directly decompressed into low-pressure steam and returns to the third pipeline, and another part returns to the flash evaporation device to flash out steam and then returns to the compressor. The steam compressor test system of the present application is more energy-saving, has a simpler design, and a simple control method.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application and are not intended to limit them. Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present application can still be modified or equivalently replaced, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steam compressor test system, characterized in that, Comprising: A steam compressor, including a first inlet, a second inlet, and a first outlet; the second inlet is used to supply water to the steam compressor; A steam storage device, including a third inlet and a second outlet, the third inlet is connected to the first outlet through a first pipeline; A flash evaporation device, including a fourth inlet and a third outlet, the fourth inlet is connected to the second outlet through a second pipeline, and the third outlet is connected to the first inlet through a third pipeline; A regulation device, used to regulate the operating parameters of the first pipeline, regulate the operating parameters of the second pipeline, and regulate the operating parameters of the third pipeline; A detection device, including a first detector, a second detector, and a third detector, the first detector is arranged on the first pipeline to detect the operating condition of the first pipeline; The second detector is arranged on the flash evaporation device to detect the operating condition of the flash evaporation device; The third detector is arranged on the third pipeline to detect the operating condition of the third pipeline, and the detection device is also used to detect the multiple system operating energy efficiencies of the steam compressor under different operating conditions in the first pipeline, the flash evaporation device, and the third pipeline; A control device, used to determine the target energy efficiency and target operating parameters according to the multiple system operating energy efficiencies; The steam compressor test system is provided with a fourth pipeline, one end of the fourth pipeline is connected to the second outlet, and the other end is connected to the third pipeline. The regulation device includes a third control valve, and the third control valve is arranged on the fourth pipeline to control the gas pressure delivered from the fourth pipeline to the third pipeline.

2. The steam compressor test system according to claim 1, wherein, The regulation device includes a first control valve, the first control valve is connected to the second inlet, and the first control valve is used to control the water inlet flow rate of the second inlet; The steam compressor test system is provided with a steam discharge port, the steam discharge port is connected to the second pipeline through a first discharge pipeline, and the regulation device includes a second control valve, and the second control valve is arranged on the first discharge pipeline to control the exhaust gas volume of the steam discharge port.

3. The steam compressor test system according to claim 2, wherein, The control device is connected to the detection device and is communicatively connected to at least one of the first control valve, the second control valve, and the third control valve.

4. The steam compressor test system according to claim 2, wherein The first control valve is communicatively connected to the first detector; and / or The second control valve is communicatively connected to the second detector; and / or The third control valve is communicatively connected to the third detector.

5. The steam compressor test system according to claim 1, wherein, The steam compressor test system is provided with a bypass pipeline, one end of the bypass pipeline is connected to the third pipeline, and the other end is connected to the third inlet. The regulation device includes a bypass valve, and a safety valve is arranged on the bypass pipeline. The bypass valve and the safety valve are both arranged on the bypass pipeline, and the bypass valve is communicatively connected to the first detector.

6. The steam compressor test system according to claim 5, characterized in that, The bypass valve and the safety valve are connected in parallel.

7. The steam compressor test system according to claim 1, characterized in that, The detection device includes a fourth detector, the fourth detector is arranged on the steam storage device, the steam storage device is provided with a fourth outlet, and the fourth detector is used to detect the liquid level of the steam storage device; The steam compressor test system is provided with a first sewage outlet, and the first sewage outlet is connected to the fourth outlet through a second discharge pipeline; The control device is provided with a fourth control valve. The fourth control valve is arranged on the second discharge pipeline for controlling the water flow rate of the second discharge pipeline, and the fourth control valve is communicatively connected to the fourth detector.

8. The steam compressor test system according to claim 1, wherein, The detection device includes a fifth detector. The fifth detector is arranged in the steam storage device for detecting the operating condition of the steam storage device; The control device is provided with a fifth control valve. The fifth control valve is arranged on the second pipeline and is close to the second outlet for controlling the air intake volume of the second pipeline. The fifth control valve is communicatively connected to the fifth detector.

9. The steam compressor test system according to claim 1, characterized in that, The detection device includes a sixth detector. The sixth detector is arranged in the flash evaporation device. The flash evaporation device is provided with a fifth outlet, and the sixth detector is used for detecting the liquid level of the flash evaporation device; The steam compressor test system is provided with a second sewage outlet, and the second sewage outlet is connected to the fifth outlet through a third discharge pipeline; The control device is provided with a sixth control valve. The sixth control valve is arranged on the third discharge pipeline for controlling the water flow rate of the third discharge pipeline, and the sixth control valve is communicatively connected to the sixth detector.

10. The steam compressor test system according to claim 9, characterized in that, The steam compressor test system is provided with a water supply port. The water supply port is provided with a water pump, and the water pump is connected to the fifth outlet through a first water replenishing pipeline; The control device is provided with a seventh control valve. The seventh control valve is arranged on the first water replenishing pipeline and is communicatively connected to the second detector and the sixth detector respectively. The seventh control valve is used for controlling the water flow rate of the first water replenishing pipeline.

11. The steam compressor test system according to claim 10, characterized in that, The water pump is connected to the second inlet for supplying liquid to the steam compressor.

12. A testing method for a steam compressor testing system, characterized in that, The test method is applied to the steam compressor test system according to any one of claims 1-11, wherein the test method includes: Adjusting the operating parameters of the first pipeline, adjusting the operating parameters of the second pipeline, and adjusting the operating parameters of the third pipeline; Detecting the operating condition of the first pipeline, detecting the operating condition of the flash evaporation device, and detecting the operating condition of the third pipeline, and detecting multiple system operating energy efficiencies of the steam compressor under different operating conditions in the first pipeline, the flash evaporation device, and the third pipeline; Determining the target energy efficiency and target operating parameters according to the multiple system operating energy efficiencies; Controlling the gas pressure of the fourth pipeline delivered to the third pipeline.

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