Anti-surge and temperature adjusting system for propylene compressor

Abstract

The invention provides an anti-surge and temperature-regulating system for a propylene compressor. The anti-surge and temperature-regulating system comprises the propylene compressor, a first-section inlet separator, a second-section inlet separator, a propylene condenser, a propylene receiving tank, a propylene flash tank, a propylene subcooler, an acid gas removal unit, two anti-surge valves and two temperature-regulating valves, and the propylene compressor is communicated with the first-section inlet separator, the second-section inlet separator and the propylene condenser. According to the temperature adjusting valve, the propylene atomization effect is optimized through the efficient spiral nozzles which are arranged up and down, and the optimal spraying amount of liquid-phase propylene under different pressures, flows and liquid level heights is ensured. The propylene refrigeration and low-temperature methanol washing linkage driving mode guarantees the suction flow and pressure of the inlet of the first section of the propylene compressor, reduces the opening degree of an anti-surge valve, and ensures the stable operation of the propylene compressor. And the design reduces the start-up feeding time, reduces the methanol loss and steam consumption, and improves the economic benefit and operation efficiency of the system.

Description

Technical Field

[0001] The invention relates to the field of propylene compressors, in particular to an anti-surge and temperature regulating system for propylene compressors. Background Art

[0002] In existing propylene refrigeration systems, a propylene compression cycle is usually used to achieve the refrigeration effect. The cycle includes basic steps such as compression, condensation, decompression and evaporation. First, gaseous propylene is pressurized to about 1.8MPaA by a propylene compressor, and then cooled by cooling water to condense it into liquid propylene. The condensation temperature is usually controlled at about 40°C. Subsequently, through the principles of throttling and expansion, the liquid propylene is depressurized in the throttle valve to reduce its liquid boiling point, and then evaporates into gaseous propylene in the heat exchanger to absorb heat from the surrounding environment to achieve the refrigeration effect.

[0003] In the field of coal chemical industry, the typical operation process includes starting the propylene compressor and running it stably, and then starting the methanol circulation of the low-temperature methanol washing process. At this time, liquid propylene is used as a cooling medium for the low-temperature methanol washing process to reduce its temperature. The propylene compressor is a centrifugal compressor driven by a steam turbine. The design parameters are a compressor first-stage inlet pressure of 0.107MPaA, a temperature of -43°C, an inlet propylene gas volume of 27340kg / h, a propylene gas volume of 10600kg / h in the air supply section, an outlet pressure of 1.83MPaA, and an outlet temperature of 89.49°C. The steam pressure at the turbine inlet is 4.0MPa, the temperature is 397°C, and the steam pressure at the turbine outlet is 1.15MPa. During the start-up of the propylene compressor, after the compressor starts to run, the main sources of propylene gas are the gas phase of the propylene flash tank, the gas phase of the inert gas stripping cooler, the gas phase of the first inlet separator, and the gas phase of the gas phase separator of the air supply section. The hand valve of the gas phase propylene from the low-temperature methanol wash is in a closed state. However, there are the following problems. During the start-up and operation of the propylene compressor, in order to avoid surge phenomenon, the opening of the anti-surge valve and the thermostatic valve needs to be adjusted during operation to keep the working point away from the surge line. Increase the valve opening and the opening of the thermostatic valve to reduce the inlet temperature. However, since the thermostatic valve uses a conventionally designed nozzle (size DN150, CL300, mixed flow rate of liquid propylene 6083 to 20278 kg / h), its actual atomization effect is poor, resulting in the accumulation of liquid propylene in the first separator. When the separator liquid level rises to 90%, the interlocking system will automatically shut down, which seriously affects the normal operation of the propylene compressor. In addition, the inlet temperature was higher than the design value, which blocked the displacement of the propylene condensate pump at the bottom of the first separator, further exacerbating the system problems. Overall, these problems led to high inlet pressure of the propylene compressor, liquid in the separator, high outlet temperature, and an operating point close to the surge line, which seriously affected the stability and operating efficiency of the entire device. Summary of the invention

[0004] Based on the above background, the purpose of the present invention is to provide an anti-surge and temperature control system for a propylene compressor to solve the technical problems existing in the background technology, such as poor anti-surge effect, low efficiency of the temperature control system, long start-up and feeding time of the purification device, and large methanol loss during startup.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A surge prevention and temperature control system for a propylene compressor, comprising a propylene compressor, a first-stage inlet separator, a second-stage inlet separator, a propylene condenser, a propylene receiving tank, a propylene flash tank, a propylene subcooler, an acid gas removal unit, two surge prevention valves and two temperature control valves;

[0007] The propylene compressors are all connected to the first-stage inlet separator, the second-stage inlet separator and the propylene condenser;

[0008] The propylene condenser is connected to the propylene receiving tank, the propylene receiving tank is connected to the propylene flash tank, the propylene flash tank is connected to the second-stage inlet separator and the propylene supercooler, the propylene supercooler is connected to the acid gas removal unit, and the acid gas removal unit is connected to the first-stage inlet separator;

[0009] The first inlet separator and the second inlet separator are both provided with an anti-surge valve and a temperature regulating valve. The temperature regulating valve is provided with two high-efficiency spiral nozzles arranged up and down. The two high-efficiency spiral nozzles are respectively located at the 1 / 3 and 2 / 3 positions of the mixer of the temperature regulating valve. The high-efficiency spiral nozzles can automatically adjust the spraying amount of liquid propylene according to the pressure, flow rate and liquid level height of the liquid propylene flowing into the mixer of the temperature regulating valve.

[0010] Furthermore, the anti-surge and temperature control system of the propylene compressor also includes an inert gas cooler and a flare unit, wherein the inert gas cooler is communicated with the propylene receiving tank, and the inert gas cooler is communicated with the flare unit.

[0011] Furthermore, the first-stage inlet separator is provided with an access valve, and the access valve is connected to the first-stage inlet separator and the acid gas removal unit.

[0012] Furthermore, the high-efficiency spiral nozzle of the thermostatic valve is made of low-temperature resistant materials to ensure good atomization effect and durability in a low-temperature environment.

[0013] Furthermore, the propylene supercooler comprises a cooling coil for supercooling the propylene liquid, and the cooling coil reduces the temperature of the propylene liquid by circulating a low-temperature coolant.

[0014] Furthermore, a temperature sensor and a pressure sensor are arranged in the propylene flash tank to monitor the temperature and pressure of the propylene in the propylene flash tank in real time.

[0015] Furthermore, the propylene receiving tank is provided with a liquid level sensor for monitoring the liquid level of the propylene liquid in the propylene receiving tank, and the liquid level sensor is electrically connected to the propylene compressor, and the propylene compressor adjusts operating parameters according to the liquid level information fed back by the liquid level sensor.

[0016] Furthermore, the propylene compressor is a centrifugal compressor driven by a steam turbine.

[0017] Combined with the above technical solutions, the beneficial effects brought by the present invention are analyzed as follows:

[0018] The present invention provides an anti-surge and temperature control system for a propylene compressor, comprising a propylene compressor, a first-stage inlet separator, a second-stage inlet separator, a propylene condenser, a propylene receiving tank, a propylene flash tank, a propylene subcooler, an acid gas removal unit, two anti-surge valves and two temperature control valves;

[0019] The propylene compressors are all connected to the first-stage inlet separator, the second-stage inlet separator and the propylene condenser;

[0020] The propylene condenser is connected to the propylene receiving tank, the propylene receiving tank is connected to the propylene flash tank, the propylene flash tank is connected to the second-stage inlet separator and the propylene supercooler, the propylene supercooler is connected to the acid gas removal unit, and the acid gas removal unit is connected to the first-stage inlet separator;

[0021] Both the first inlet separator and the second inlet separator are provided with an anti-surge valve and a thermostatic valve. The thermostatic valve is provided with two high-efficiency spiral nozzles arranged up and down. The two high-efficiency spiral nozzles are respectively located at the 1 / 3 and 2 / 3 positions of the mixer of the thermostatic valve. The high-efficiency spiral nozzles can automatically adjust the spraying amount of liquid propylene according to the pressure, flow rate and liquid level height of the liquid propylene flowing into the mixer of the thermostatic valve.

[0022] The propylene compressor system uses the principle of propylene refrigeration to cool the low-temperature methanol washing system by means of the evaporation process of liquid propylene. When the propylene compressor is started, propylene gas from the acid gas removal unit enters, and the propylene gas in the refrigeration process enters the propylene compressor through a section of the inlet separator, and is pressurized to 1.83MPaA in the propylene compressor.

[0023] The compressed propylene gas enters the propylene condenser, condenses to 40°C, and converts into liquid phase. The liquid propylene enters the propylene receiving tank by gravity. The non-condensable gas in the propylene receiving tank is sent to the inert gas cooler and cooled to -35°C to recover propylene.

[0024] Next, the liquid propylene in the propylene receiving tank is decompressed to 0.6MPaA and enters the propylene flash tank, where it is flashed. The flashed propylene gas returns to the second stage of the propylene compressor through the second-stage inlet separator, and the liquid propylene enters the propylene supercooler. The propylene liquid is divided into two parts, one part is supercooled to -11°C and sent to the acid gas removal unit, and the other part is evaporated under reduced pressure to provide cooling for the propylene supercooler. The evaporated propylene gas returns to the first-stage inlet separator and re-enters the compression cycle.

[0025] In addition, through the coordinated adjustment of the thermostatic valve and the anti-surge valve, the system can stabilize the operation of the propylene compressor and provide continuous cooling capacity for low-temperature methanol washing. The efficient spiral nozzle of the thermostatic valve can automatically adjust the spray volume according to the pressure, flow rate and liquid level of liquid propylene, optimize the atomization effect of propylene, and ensure the efficient operation of the system.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The present invention significantly improves the anti-surge effect. By using two anti-surge valves and an optimized thermostatic valve design, the propylene compressor is effectively prevented from surging during startup and operation, ensuring efficient and stable operation of the system. At the same time, the present invention automatically adjusts the spray volume according to the pressure, flow rate and liquid level of liquid propylene by using a thermostatic valve equipped with an efficient spiral nozzle, which greatly improves the atomization effect, reduces liquid accumulation, and improves the efficiency of the thermostatic system. During the startup process, the present invention effectively shortens the start-up and feeding time of the purification device, reduces the startup time and energy consumption, and reduces the methanol loss during the low-temperature methanol washing process. In addition, the optimized system structure and control design improve the operating efficiency of the propylene compressor system, significantly reduce problems such as high inlet pressure and high outlet temperature, and enhance the overall stability and safety of the device.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 It is the overall flow chart of the present invention;

[0031] Figure 2 It is a schematic diagram of the positional relationship between the mixer and the high-efficiency spiral nozzle of the present invention.

[0032] In the figure: 1. Propylene compressor; 2. First stage inlet separator; 3. Second stage inlet separator; 4. Propylene condenser; 5. Propylene receiving tank; 6. Propylene flash tank; 7. Propylene subcooler; 8. Acid gas removal unit; 9. Anti-surge valve; 10. Temperature regulating valve; 11. High-efficiency spiral nozzle; 12. Mixer; 13. Inert gas cooler; 14. Flare unit; 15. Access valve. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The embodiments are described in detail below with reference to the accompanying drawings: Figure 1 It is the overall flow chart of the present invention; Figure 2 It is a schematic diagram of the positional relationship between the mixer 12 and the high-efficiency spiral nozzle 11 of the present invention.

[0037] Example 1

[0038] This embodiment provides an anti-surge and temperature control system for a propylene compressor. Figure 1 to Figure 2 .

[0039] like Figure 1 As shown, an anti-surge and temperature control system for a propylene compressor includes a propylene compressor 1, a first-stage inlet separator 2, a second-stage inlet separator 3, a propylene condenser 4, a propylene receiving tank 5, a propylene flash tank 6, a propylene subcooler 7, an acid gas removal unit 8, two anti-surge valves 9 and two temperature control valves 10.

[0040] The propylene compressor 1 is connected to the first-stage inlet separator 2, the second-stage inlet separator 3 and the propylene condenser 4.

[0041] The propylene condenser 4 is connected to the propylene receiving tank 5, the propylene receiving tank 5 is connected to the propylene flash tank 6, the propylene flash tank 6 is connected to the second-stage inlet separator 3 and the propylene supercooler 7, the propylene supercooler 7 is connected to the acid gas removal unit 8, and the acid gas removal unit 8 is connected to the first-stage inlet separator 2.

[0042] like Figure 2 As shown, an anti-surge valve 9 and a thermostatic valve 10 are provided at a first inlet separator 2 and a second inlet separator. The thermostatic valve 10 is provided with two high-efficiency spiral nozzles 11 arranged up and down. The two high-efficiency spiral nozzles 11 are respectively located at the mixer 121 / 3 and 2 / 3 positions of the thermostatic valve 10. The high-efficiency spiral nozzles 11 can automatically adjust the spraying amount of liquid propylene according to the pressure, flow rate and liquid level of the liquid propylene flowing into the mixer 12 of the thermostatic valve 10.

[0043] The propylene compressor 1 system uses the principle of propylene refrigeration to cool the low-temperature methanol washing system by means of the evaporation process of liquid propylene. When the propylene compressor 1 is started, the propylene gas from the acid gas removal unit 8 enters, and the propylene gas in the refrigeration process enters the propylene compressor 1 through a first inlet separator 2, and is pressurized to 1.83MPaA in the propylene compressor 1.

[0044] The compressed propylene gas enters the propylene condenser 4, condenses to 40°C, and is converted into liquid phase. The liquid propylene enters the propylene receiving tank 5 by gravity. The non-condensable gas in the propylene receiving tank 5 is sent to the inert gas cooler 13, cooled to -35°C to recover propylene.

[0045] Next, the liquid propylene in the propylene receiving tank 5 is decompressed to 0.6MPaA and enters the propylene flash tank 6, where it is flashed. The flashed propylene gas returns to the second stage of the propylene compressor 1 through the second-stage inlet separator 3, and the liquid propylene enters the propylene supercooler 7. The propylene liquid is divided into two parts, one part is supercooled to -11°C and sent to the acid gas removal unit 8, and the other part is evaporated under reduced pressure to provide cooling for the propylene supercooler 7. The evaporated propylene gas returns to the first-stage inlet separator 2 and re-enters the compression cycle.

[0046] In addition, through the coordinated adjustment of the thermostatic valve 10 and the anti-surge valve, the system can stabilize the operation of the propylene compressor 1 and provide continuous cooling capacity for low-temperature methanol washing. The efficient spiral nozzle 11 of the thermostatic valve 10 can automatically adjust the spray volume according to the pressure, flow rate and liquid level of liquid propylene, optimize the atomization effect of propylene, and ensure the efficient operation of the system.

[0047] Furthermore, the anti-surge and temperature control system of the propylene compressor also includes an inert gas cooler 13 and a flare unit 14 . The inert gas cooler is connected to the propylene receiving tank 5 , and the inert gas cooler 13 is connected to the flare unit 14 .

[0048] The inert gas cooler 13 is connected to the propylene receiving tank 5 and is mainly used to process the non-condensable gas generated in the propylene receiving tank 5. When the liquid propylene is condensed and depressurized in the propylene receiving tank 5, some non-condensable gas may be generated, such as a trace amount of inert gas such as nitrogen or oxygen. The inert gas cooler 13 further cools these gases to about -35°C to recover the propylene component therein, and at the same time reduces the temperature of the gas, reducing its pressure and volume in the subsequent processing process.

[0049] The remaining gas after the inert gas cooler 13, if there is still some unrecoverable part in it, will be introduced into the flare unit 14. In the flare unit 14, these residual inert gases are ignited and burned safely, thereby avoiding direct discharge into the atmosphere and eliminating potential environmental pollution and safety hazards.

[0050] Furthermore, the first-stage inlet separator 2 is provided with an inlet valve 15 , and the inlet valve 15 is connected to the first-stage inlet separator 2 and the acid gas removal unit 8 .

[0051] The access valve 15 can control the flow and pressure of the purified propylene gas from the acid gas removal unit 8 into the propylene compressor 1 system. It ensures that the propylene compressor 1 receives stable propylene gas at a suitable pressure by adjusting the amount of gas entering the first inlet separator 2, optimizes the operating state of the compressor, and prevents equipment failure or efficiency reduction caused by too high or too low operating parameters. At the same time, the access valve 15 can also close the gas channel when necessary to prevent unqualified or harmful gases from entering the system and protect the safety of the equipment.

[0052] Furthermore, the high-efficiency spiral nozzle 11 of the thermostatic valve 10 is made of low-temperature resistant materials to ensure good atomization effect and durability in a low-temperature environment.

[0053] The high-efficiency spiral nozzle 11 of the thermostatic valve 10 is made of low-temperature resistant materials to ensure that the nozzle can work stably in a low-temperature environment and provide good atomization effect and durability. In this system, liquid propylene needs to be sprayed and atomized through the thermostatic valve 10 to achieve efficient heat exchange and temperature regulation. Therefore, the nozzle material must have sufficient low-temperature resistance to prevent the material from becoming brittle, cracking or failing under low-temperature conditions. At the same time, the application of low-temperature resistant materials can maintain the structural integrity and functional stability of the nozzle in long-term operation, thereby optimizing the operating efficiency of the system, extending the service life of the equipment, and reducing the frequency of maintenance and replacement.

[0054] Furthermore, the propylene supercooler 7 includes a cooling coil for supercooling the propylene liquid, and the cooling coil reduces the temperature of the propylene liquid by circulating a low-temperature coolant.

[0055] The cooling coil is used to reduce the temperature of the propylene liquid by circulating a low-temperature coolant to achieve the purpose of supercooling. By reducing the temperature of the propylene liquid to below its boiling point, the cooling coil ensures that the propylene has a greater cooling capacity when entering the downstream unit of the system, such as the acid gas removal unit 8, which not only improves the cooling effect of the propylene, but also enhances the overall energy efficiency and stability of the system.

[0056] Furthermore, a temperature sensor and a pressure sensor are provided in the propylene flash tank 6 to monitor the temperature and pressure of the propylene in the propylene flash tank 6 in real time.

[0057] The temperature sensor and pressure sensor provided in the propylene flash tank 6 are used to monitor the temperature and pressure of the propylene in the tank in real time. The temperature sensor can ensure that the propylene reaches the appropriate temperature during the flash process to optimize the flash effect and improve the separation efficiency. The pressure sensor ensures that the flash process is carried out within the designed pressure range, thereby avoiding equipment failure or operating problems caused by abnormal pressure. By monitoring and adjusting these parameters in real time, the system can maintain a stable operating state, improve overall efficiency and safety, and prevent potential equipment problems.

[0058] Furthermore, a liquid level sensor is provided in the propylene receiving tank 5 to monitor the liquid level of the propylene liquid in the propylene receiving tank 5, and the liquid level sensor is electrically connected to the propylene compressor 1. The propylene compressor 1 adjusts the operating parameters according to the liquid level information fed back by the liquid level sensor.

[0059] The liquid level sensor provided in the propylene receiving tank 5 is used to monitor the liquid level of the propylene liquid in the receiving tank. The liquid level sensor is electrically connected to the propylene compressor 1 and can provide real-time feedback of the liquid level information to the compressor. Based on this feedback information, the propylene compressor 1 can automatically adjust its operating parameters to maintain the liquid within a predetermined liquid level range. This can prevent the liquid level from being too high or too low, and avoid overloading the system due to excessive liquid or unstable operation due to insufficient liquid.

[0060] Furthermore, the propylene compressor 1 is a centrifugal compressor driven by a steam turbine.

[0061] Steam turbine drive provides a stable and efficient power source for centrifugal compressors, allowing them to operate continuously and efficiently. Centrifugal compressors accelerate gas through their rotating impellers, converting it into kinetic energy, and then converting the kinetic energy into pressure energy through the expansion section of the centrifugal compressor, which can effectively increase the pressure of the gas. The steam turbine drive method ensures the high efficiency and stability of the centrifugal compressor, while reducing the complexity of the mechanical drive system and improving the overall operating efficiency and reliability of the system.

[0062] Alternative implementations:

[0063] A flash tank is added at the bottom of the first inlet separator 2, and jacket steam heating is added at the bottom of the flash tank, thereby solving the problems of small inlet flow of the compressor and liquid carrying in the separator, replacing the function of the propylene condensate pump, and ensuring the normal operation of the propylene compressor 1.

Claims

1. An anti-surge and temperature control system for a propylene compressor, characterized in that: The anti-surge and temperature control system for a propylene compressor comprises a propylene compressor (1), a first-stage inlet separator (2), a second-stage inlet separator (3), a propylene condenser (4), a propylene receiving tank (5), a propylene flash tank (6), a propylene subcooler (7), an acid gas removal unit (8), two anti-surge valves (9) and two temperature control valves (10); The propylene compressor (1) is connected to the first-stage inlet separator (2), the second-stage inlet separator (3) and the propylene condenser (4); The propylene condenser (4) is connected to the propylene receiving tank (5), the propylene receiving tank (5) is connected to the propylene flash tank (6), the propylene flash tank (6) is connected to the second-stage inlet separator (3) and the propylene supercooler (7), the propylene supercooler (7) is connected to the acid gas removal unit (8), and the acid gas removal unit (8) is connected to the first-stage inlet separator (2); The first inlet separator (2) and the second inlet separator are both provided with an anti-surge valve (9) and a temperature regulating valve (10); the temperature regulating valve (10) is provided with two high-efficiency spiral spray heads (11) arranged vertically; the two high-efficiency spiral spray heads (11) are respectively located at the 1 / 3 and 2 / 3 positions of the mixer (12) of the temperature regulating valve (10); the high-efficiency spiral spray heads (11) can automatically adjust the spraying amount of liquid phase propylene according to the pressure, flow rate and liquid level height of the liquid phase propylene flowing into the mixer (12) of the temperature regulating valve (10).

2. The anti-surge and temperature control system for a propylene compressor according to claim 1, characterized in that: The anti-surge and temperature control system of the propylene compressor (1) further comprises an inert gas cooler (13) and a flare unit (14), wherein the inert gas cooler is connected to the propylene receiving tank (5), and the inert gas cooler (13) is connected to the flare unit (14).

3. The anti-surge and temperature control system for a propylene compressor according to claim 1, characterized in that: The first-stage inlet separator (2) is provided with an inlet valve (15), and the inlet valve (15) is connected to the first-stage inlet separator (2) and the acid gas removal unit (8).

4. The anti-surge and temperature control system for a propylene compressor according to claim 1, characterized in that: The high-efficiency spiral spray head (11) of the temperature regulating valve (10) is made of low-temperature resistant material to ensure good atomization effect and durability in a low-temperature environment.

5. The anti-surge and temperature control system for a propylene compressor according to claim 1, characterized in that: The propylene supercooler (7) comprises a cooling coil for supercooling the propylene liquid, and the cooling coil reduces the temperature of the propylene liquid by circulating a low-temperature coolant.

6. The anti-surge and temperature control system for a propylene compressor according to claim 1, characterized in that: A temperature sensor and a pressure sensor are arranged in the propylene flash tank (6) to monitor the temperature and pressure of the propylene in the propylene flash tank (6) in real time.

7. The anti-surge and temperature control system for a propylene compressor according to claim 2, characterized in that: The propylene receiving tank (5) is provided with a liquid level sensor for monitoring the liquid level of the propylene liquid in the propylene receiving tank (5), and the liquid level sensor is electrically connected to the propylene compressor (1). The propylene compressor (1) adjusts operating parameters according to the liquid level information fed back by the liquid level sensor.

8. The anti-surge and temperature control system for a propylene compressor according to claim 7, characterized in that: The propylene compressor (1) is a centrifugal compressor driven by a steam turbine.

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