Separating and recycling system and method for vertical reciprocating compressor

Abstract

The vertical reciprocating compressor separating and recycling system comprises a compressor shell, the inner bottom face of the compressor shell is connected with an oil tank, the inner wall of the compressor shell is connected with a crankshaft, the crankshaft is arranged above the oil tank, one end of the crankshaft is connected with a power assembly, the inner top face of the compressor shell is connected with an air cylinder, and a piston is connected into the air cylinder; a piston rod of the piston is connected with the crankshaft through a crosshead, the inner wall of the compressor shell is connected with an isolation chamber, the isolation chamber is arranged below the air cylinder, the isolation chamber is connected with a recovery assembly, the recovery assembly penetrates through the side wall of the compressor shell to be connected with a separation system, and the separation system is connected with the oil tank and the air cylinder. The invention further discloses a recycling method of the vertical reciprocating compressor separating and recycling system. Process gas and lubricating oil are separated, the process gas is recycled and returned to a first-stage inlet of the compressor to be reused, the partial pressure of the isolation chamber is controlled, and the loss of packing seal is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical production auxiliary systems, specifically relates to a separation, recovery and utilization system for vertical reciprocating compressors, and also relates to a recovery and utilization method for this system. Background Art

[0002] In modern chemical production systems, compressors, as the core equipment for pressure regulation, play a crucial role in maintaining the pressure balance of polymerization reactions and ensuring the continuity of the process flow. Among them, vertical reciprocating compressors are widely used in the gas-phase compression links of polymerization systems such as synthetic ammonia, methanol, and olefins due to their advantages of compact structure, high operating stability, and adaptability to high-pressure working conditions. However, the problems of packing seal leakage and axial liquid entrainment exposed during the actual operation of this type of compressor have become major hidden dangers restricting the long-term stable operation of the device.

[0003] The dynamic seal structure between the piston rod and the stuffing box of the vertical reciprocating machine is prone to an increase in clearance due to wear, thermal deformation, or medium corrosion during long-term high-frequency reciprocating motion. For polymerization systems that transport flammable, explosive, or highly toxic media such as hydrogen, ammonia, and hydrocarbons, when the medium leakage rate of the compressor exceeds 0.5% due to packing failure, it not only causes raw material losses worth over one million yuan per year for a single unit, but also reduces the load rate of the device by more than 12% due to frequent shutdowns for maintenance.

[0004] The inherent vertical piston motion characteristics of the vertical structure make the unit extremely sensitive to liquid components entrained in the gas phase medium. When the crankcase lubricating oil intermixes with the process medium, it forms an oil mist in the crankcase, and the gas phase brings the lubricating oil into the middle body of the compressor, causing the crankcase lubricating oil to gradually decrease, resulting in insufficient lubrication of the crankshaft, and further causing wear of the crankshaft bearing shells. The lubricating oil in the middle body gradually forms a liquid phase, causing a decrease in the gas phase partial pressure in the middle body and the entrainment of lubricating oil droplets in the gas phase into the cylinder, resulting in problems such as uneven wear and liquid entrainment of the cylinder, etc., ultimately causing compressor failure. Summary of the Invention

[0005] The purpose of the present invention is to provide a separation, recovery and utilization system for vertical reciprocating compressors, which solves the problem of wear of the crankshaft bearing shells caused by medium leakage in the prior art.

[0006] Another purpose of the present invention is to provide a recovery and utilization method for the separation, recovery and utilization system of vertical reciprocating compressors.

[0007] The technical solution adopted by the present invention is a vertical reciprocating compressor separation, recovery and utilization system, which includes a compressor housing. An oil tank is connected to the inner bottom surface of the compressor housing. A crankshaft is connected to the inner wall of the compressor housing. The crankshaft is arranged above the oil tank. One end of the crankshaft is connected to a power assembly. The inner top surface of the compressor housing is connected to a cylinder. A piston is connected inside the cylinder. The piston rod of the piston is connected to the crankshaft through a crosshead. The inner wall of the compressor housing is connected to a separation chamber. The separation chamber is arranged below the cylinder. The separation chamber is connected to a recovery assembly. The recovery assembly passes through the side wall of the compressor housing and is connected to a separation system. The separation system is connected to the oil tank.

[0008] The characteristics of the present invention also lie in that The power assembly includes a flywheel. One end of the crankshaft passes through the side wall of the compressor housing and is connected to the flywheel. A mechanical seal ring is connected to the connection point where the crankshaft passes through the side wall of the compressor housing. The other end of the crankshaft passes through the side wall of the compressor housing and is connected to a shaft head pump.

[0009] The crosshead is connected to the inner wall of the compressor housing through a crosshead bushing.

[0010] The piston rod body of the piston passes through the bottom of the separation chamber. A guide bearing is connected at the connection point between the piston rod of the piston and the separation chamber. The piston rod of the piston passes through the guide bearing.

[0011] The recovery assembly includes an oil collecting pipe. The oil collecting pipe is connected to the bottom of the separation chamber. One end of the oil collecting pipe passes through the side wall of the compressor housing and is connected to the separation system. It also includes a leakage recovery pipe. The leakage recovery pipe is connected to the connection point where the piston rod of the piston passes through the outer wall of the cylinder. One end of the leakage recovery pipe passes through the side wall of the compressor housing and is connected to the separation system.

[0012] The separation system includes a suspension separator. A filter is connected inside the suspension separator. The oil collecting pipe is connected to the suspension separator. The bottom of the suspension separator is connected to an oil delivery pipe. The end of the oil delivery pipe far from the suspension separator is connected to the oil tank. The top of the suspension separator is connected to a gas delivery pipe. The leakage recovery pipe is connected to the pipe body of the gas delivery pipe.

[0013] The suspension separator is connected with a differential pressure gauge and a liquid level gauge. The differential pressure gauge is arranged close to the filter. The liquid level gauge is arranged close to the bottom of the suspension separator. A third valve is connected to the pipe body of the oil delivery pipe. A second valve is connected to the pipe body of the gas delivery pipe. A first valve is connected to the pipe body of the leakage recovery pipe. The first valve is arranged close to the connection point between the leakage recovery pipe and the gas delivery pipe. A fourth valve is connected to the pipe body of the oil collecting pipe. A pressure control gauge is connected between the fourth valve and the separation chamber.

[0014] The piston is connected with a gas valve. The top of the piston is connected with a piston cylinder head.

[0015] Another technical solution adopted by the present invention is a method for recycling and utilization of a vertical reciprocating compressor separation and recycling system, which is specifically implemented according to the following steps: Step 1. The flywheel drives the piston rod of the piston to reciprocate through the crankshaft, and the oil-gas mixed medium in the isolation chamber leaks into the oil collection pipe; Step 2. The gas medium leaking from the cylinder enters the air leakage recovery pipe and then enters the gas transmission pipe; Step 3. The oil-gas mixed medium in the oil collection pipe is collected and separated by a suspension separator, and the process gas medium filters the lubricating oil through a filter. The separated process gas is discharged from the gas transmission pipe into the compressor inlet for recycling; Step 4. The lubricating oil separated in the suspension separator enters the oil tank through the oil transmission pipe for recycling.

[0016] The beneficial effects of the present invention are as follows: For the vertical reciprocating compressor separation and recycling system of the present invention, the process gas and the lubricating oil are separated. The process gas is recycled and returned to the first-stage inlet of the compressor for reuse, the partial pressure of the isolation chamber is controlled, and the loss of the packing seal is reduced. The lubricating oil is centrally collected and timely discharged into the crankcase for recycling. It solves the problems of low operating efficiency of the current unit caused by the leakage of process gas during operation and large leakage of the packing seal; it solves the problems of insufficient lubrication of the unit caused by the lack of lubricating oil and the occurrence of frequent damage and shutdown of the gas valve caused by liquid carrying in the isolation chamber, and reduces the maintenance frequency of the unit. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the vertical reciprocating compressor separation and recycling system of the present invention.

[0018] In the figure, 1. Piston, 2. Air leakage recovery pipe, 3. Isolation chamber, 4. Compressor housing, 5. Oil collecting box, 6. Crosshead jacket, 7. Flywheel, 8. Mechanical seal ring, 9. Piston cylinder head, 10. Gas valve, 11. Cylinder, 12. Guide bearing, 13. Crosshead, 14. Crankshaft, 15. Head pump, 16. Oil tank, 17. Oil collection pipe, 18. Suspension separator, 19. Differential pressure gauge, 20. Filter, 21. Liquid level gauge, 22. First valve, 23. Second valve, 24. Third valve, 25. Fourth valve, 26. Pressure control gauge, 27. Gas transmission pipe, 28. Oil transmission pipe. Detailed Embodiments

[0019] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0020] The vertical reciprocating compressor separation and recycling system of the present invention, as Figure 1As shown in the figure, it includes a compressor housing 4. An oil tank 16 is connected to the inner bottom surface of the compressor housing 4. A crankshaft 14 is connected to the inner wall of the compressor housing 4. The crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected to a power assembly. The inner top surface of the compressor housing 4 is connected to a cylinder 11. A piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected to the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected to an isolation chamber 3. The isolation chamber 3 is arranged below the cylinder 11. The isolation chamber 3 is connected to a recovery assembly. The recovery assembly passes through the side wall of the compressor housing 4 and is connected to a separation system. The separation system is connected to the oil tank 16. The power assembly drives the piston rod of the piston 1 to make a linear reciprocating motion through the crankshaft 14. The crankshaft 14 makes a circular motion. The piston rod can make a linear motion through the crosshead 13. The oil-gas mixed medium leaking in the isolation chamber 3 is recovered by the recovery assembly, flows into the separation system and is separated. The separated clean process gas medium is recovered to the first-stage inlet of the compressor. The separated lubricating oil flows into the oil tank 16 (crankcase) to achieve the purpose of recycling.

[0021] Example 1 A vertical reciprocating compressor separation and recovery system includes a compressor housing 4. An oil tank 16 is connected to the inner bottom surface of the compressor housing 4. A crankshaft 14 is connected to the inner wall of the compressor housing 4. The crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected to a power assembly. The inner top surface of the compressor housing 4 is connected to a cylinder 11. A piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected to the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected to an isolation chamber 3. The isolation chamber 3 is arranged below the cylinder 11. The isolation chamber 3 is connected to a recovery assembly. The recovery assembly passes through the side wall of the compressor housing 4 and is connected to a separation system. The separation system is connected to the oil tank 16.

[0022] The power assembly includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to the flywheel 7. A mechanical seal ring 8 is connected to the connection point where the crankshaft 14 passes through the side wall of the compressor housing 4. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to a shaft head pump 15. The mechanical seal ring 8 seals the connection point between the compressor housing 4 and the crankshaft 14 to prevent the lubricating oil in the oil tank 16 from leaking. The flywheel 7 is connected to an electric motor. The electric motor drives the crankshaft 14 to make a circular motion through the flywheel 7. The shaft head pump 15 is connected to an external pipeline along with the movement of the crankshaft 14 to add lubricating oil to the oil tank 16.

[0023] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead jacket 6. The crosshead 13 is fixed through the crosshead jacket 6.

[0024] Example 2 Vertical reciprocating compressor separation, recovery and utilization system, including a compressor housing 4. The inner bottom surface of the compressor housing 4 is connected to an oil tank 16. The inner wall of the compressor housing 4 is connected to a crankshaft 14. The crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected to a power assembly. The inner top surface of the compressor housing 4 is connected to a cylinder 11. A piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected to the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected to a separation chamber 3. The separation chamber 3 is arranged below the cylinder 11. The separation chamber 3 is connected to a recovery assembly. The recovery assembly passes through the side wall of the compressor housing 4 and is connected to a separation system. The separation system is connected to the oil tank 16.

[0025] The power assembly includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to the flywheel 7. A mechanical seal ring 8 is connected to the connection point where the crankshaft 14 passes through the side wall of the compressor housing 4. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to a shaft head pump 15.

[0026] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead bushing 6.

[0027] The piston rod of the piston 1 passes through the bottom of the separation chamber 3. A guide bearing 12 is connected to the connection point between the piston rod of the piston 1 and the separation chamber 3. The piston rod of the piston 1 passes through the guide bearing 12. The guide bearing 12 guides the piston rod of the piston 1. An oil collecting box 5 is connected by a pipeline at the guide bearing 12. A small amount of lubricating oil leaked from the guide bearing 12 enters the oil collecting box 5.

[0028] Embodiment 3 Vertical reciprocating compressor separation, recovery and utilization system, including a compressor housing 4. The inner bottom surface of the compressor housing 4 is connected to an oil tank 16. The inner wall of the compressor housing 4 is connected to a crankshaft 14. The crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected to a power assembly. The inner top surface of the compressor housing 4 is connected to a cylinder 11. A piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected to the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected to a separation chamber 3. The separation chamber 3 is arranged below the cylinder 11. The separation chamber 3 is connected to a recovery assembly. The recovery assembly passes through the side wall of the compressor housing 4 and is connected to a separation system. The separation system is connected to the oil tank 16.

[0029] The power assembly includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to the flywheel 7. A mechanical seal ring 8 is connected to the connection point where the crankshaft 14 passes through the side wall of the compressor housing 4. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to a shaft head pump 15.

[0030] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead bushing 6.

[0031] The piston rod body of the piston 1 passes through the bottom of the isolation chamber 3. A guiding bearing 12 is connected at the connection point between the piston rod of the piston 1 and the isolation chamber 3, and the piston rod of the piston 1 passes through the guiding bearing 12.

[0032] The recovery assembly includes an oil recovery pipe 17 which is connected to the bottom of the isolation chamber 3. One end of the oil recovery pipe 17 passes through the side wall of the compressor housing 4 and is connected to the separation system. It also includes a leakage recovery pipe 2 which is connected to the connection point where the piston rod of the piston 1 passes through the outer wall of the cylinder 11. One end of the leakage recovery pipe 2 passes through the side wall of the compressor housing 4 and is connected to the separation system. The oil recovery pipe 17 is connected to the isolation chamber through multiple branch pipes, collects the leaked oil-gas mixed medium and discharges it into the separation system. The leakage recovery pipe 2 is connected to the connection point where the piston rod of the piston 1 passes through the outer wall of the cylinder 11 through a branch pipe. The process gas medium leaked at the cylinder 11 is recovered through the leakage recovery pipe 2, converges with the process gas medium separated by the separation system, and then enters the first-stage inlet of the compressor.

[0033] Embodiment 4 A vertical reciprocating compressor separation and recovery system includes a compressor housing 4. The inner bottom surface of the compressor housing 4 is connected with an oil tank 16. The inner wall of the compressor housing 4 is connected with a crankshaft 14. The crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected with a power assembly. The inner top surface of the compressor housing 4 is connected with a cylinder 11. A piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected with the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected with an isolation chamber 3. The isolation chamber 3 is arranged below the cylinder 11. The isolation chamber 3 is connected with a recovery assembly. The recovery assembly passes through the side wall of the compressor housing 4 and is connected with a separation system. The separation system is connected with the oil tank 16.

[0034] The power assembly includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected with the flywheel 7. A mechanical seal ring 8 is connected at the connection point where the crankshaft 14 passes through the side wall of the compressor housing 4. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected with a shaft head pump 15.

[0035] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead jacket 6.

[0036] The piston rod body of the piston 1 passes through the bottom of the isolation chamber 3. A guiding bearing 12 is connected at the connection point between the piston rod of the piston 1 and the isolation chamber 3, and the piston rod of the piston 1 passes through the guiding bearing 12.

[0037] The recovery component includes an oil recovery pipe 17, which is connected to the bottom of the isolation chamber 3. One end of the oil recovery pipe 17 passes through the side wall of the compressor housing 4 and is connected to the separation system; it also includes a leakage recovery pipe 2, which is connected to the connection point where the piston rod of the piston 1 passes through the outer wall of the cylinder 11. One end of the leakage recovery pipe 2 passes through the side wall of the compressor housing 4 and is connected to the separation system.

[0038] The separation system includes a suspension separator 18, and a filter 20 is connected inside the suspension separator 18. The oil recovery pipe 17 is connected to the suspension separator 18. The bottom of the suspension separator 18 is connected to an oil delivery pipe 28. The end of the oil delivery pipe 28 away from the suspension separator 18 is connected to the oil tank 16. The top of the suspension separator 18 is connected to a gas delivery pipe 27, and the leakage recovery pipe 2 is connected to the pipe body of the gas delivery pipe 27. The gas delivery pipe 27 is connected to the inlet of the compressor. The oil-gas mixed medium recovered by the oil recovery pipe 17 enters the suspension separator 18. The lubricating oil is filtered by the filter 20. The filtered process gas passes through the gas delivery pipe 27 and converges with the process gas medium recovered by the leakage recovery pipe 2 and then enters the first-stage inlet of the compressor. The filtered lubricating oil is input into the oil tank 16 through the oil delivery pipe 28.

[0039] Embodiment 5 A vertical reciprocating compressor separation and recovery system includes a compressor housing 4. The inner bottom surface of the compressor housing 4 is connected to an oil tank 16. The inner wall of the compressor housing 4 is connected to a crankshaft 14, and the crankshaft 14 is arranged above the oil tank 16. One end of the crankshaft 14 is connected to a power component. The inner top surface of the compressor housing 4 is connected to a cylinder 11, and a piston 1 is connected inside the cylinder 11. The piston rod of the piston 1 is connected to the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected to an isolation chamber 3, and the isolation chamber 3 is arranged below the cylinder 11. The isolation chamber 3 is connected to a recovery component, and the recovery component passes through the side wall of the compressor housing 4 and is connected to a separation system, and the separation system is connected to the oil tank 16.

[0040] The power component includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to the flywheel 7. A mechanical seal 8 is connected to the connection point where the crankshaft 14 passes through the side wall of the compressor housing 4. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected to a shaft head pump 15.

[0041] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead jacket 6.

[0042] The piston rod of the piston 1 passes through the bottom of the isolation chamber 3, and a guide bearing 12 is connected to the connection point between the piston rod of the piston 1 and the isolation chamber 3, and the piston rod of the piston 1 passes through the guide bearing 12.

[0043] The recovery component includes an oil recovery pipe 17, which is connected to the bottom of the isolation chamber 3. One end of the oil recovery pipe 17 passes through the side wall of the compressor housing 4 and is connected to the separation system; it also includes a leakage recovery pipe 2, which is connected to the connection point where the piston rod of the piston 1 passes through the outer wall of the cylinder 11. One end of the leakage recovery pipe 2 passes through the side wall of the compressor housing 4 and is connected to the separation system.

[0044] The separation system includes a suspension separator 18, in which a filter 20 is connected. The oil recovery pipe 17 is connected to the suspension separator 18. The bottom of the suspension separator 18 is connected to an oil delivery pipe 28. The end of the oil delivery pipe 28 far from the suspension separator 18 is connected to an oil tank 16. The top of the suspension separator 18 is connected to a gas delivery pipe 27, and the leakage recovery pipe 2 is connected to the pipe body of the gas delivery pipe 27.

[0045] The suspension separator 18 is connected with a differential pressure gauge 19 and a liquid level gauge 21. The differential pressure gauge 19 is arranged close to the filter 20, and the liquid level gauge 21 is arranged close to the bottom of the suspension separator 18. The pipe body of the oil delivery pipe 28 is connected with a third valve 24, the pipe body of the gas delivery pipe 27 is connected with a second valve 23, the pipe body of the leakage recovery pipe 2 is connected with a first valve 22, and the first valve 22 is arranged close to the connection point of the leakage recovery pipe 2 and the gas delivery pipe 27. The pipe body of the oil recovery pipe 17 is connected with a fourth valve 25, and a pressure control gauge 26 is connected between the fourth valve 25 and the isolation chamber 3. The valve control switches on each pipeline, the liquid level gauge 21 measures the liquid level of the lubricating oil in the suspension separator 18, and the pressure control gauge 26 monitors the pressure between the oil recovery pipe 17 and the isolation chamber 3 in real time.

[0046] Embodiment 6 A vertical reciprocating compressor separation and recovery system includes a compressor housing 4. The inner bottom surface of the compressor housing 4 is connected with an oil tank 16. The inner wall of the compressor housing 4 is connected with a crankshaft 14, which is arranged above the oil tank 16. One end of the crankshaft 14 is connected with a power component. The inner top surface of the compressor housing 4 is connected with a cylinder 11. A piston 1 is connected in the cylinder 11. The piston rod of the piston 1 is connected with the crankshaft 14 through a crosshead 13. The inner wall of the compressor housing 4 is connected with an isolation chamber 3, which is arranged below the cylinder 11. The isolation chamber 3 is connected with a recovery component, and the recovery component passes through the side wall of the compressor housing 4 and is connected with a separation system, and the separation system is connected with the oil tank 16.

[0047] The power component includes a flywheel 7. One end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected with the flywheel 7. The connection point where the crankshaft 14 passes through the side wall of the compressor housing 4 is connected with a mechanical seal 8. The other end of the crankshaft 14 passes through the side wall of the compressor housing 4 and is connected with a shaft head pump 15.

[0048] The crosshead 13 is connected to the inner wall of the compressor housing 4 through a crosshead jacket 6.

[0049] The piston rod body of the piston 1 passes through the bottom of the isolation chamber 3. A guiding bearing 12 is connected at the connection point between the piston rod of the piston 1 and the isolation chamber 3, and the piston rod of the piston 1 passes through the guiding bearing 12.

[0050] The recovery assembly includes an oil recovery pipe 17, and the oil recovery pipe 17 is connected to the bottom of the isolation chamber 3. One end of the oil recovery pipe 17 passes through the side wall of the compressor housing 4 and is connected to the separation system; it also includes a leakage recovery pipe 2, and the leakage recovery pipe 2 is connected to the connection point where the piston rod of the piston 1 passes through the outer wall of the cylinder 11. One end of the leakage recovery pipe 2 passes through the side wall of the compressor housing 4 and is connected to the separation system.

[0051] The separation system includes a suspension separator 18, and a filter 20 is connected inside the suspension separator 18. The oil recovery pipe 17 is connected to the suspension separator 18. The bottom of the suspension separator 18 is connected to an oil delivery pipe 28, and the end of the oil delivery pipe 28 away from the suspension separator 18 is connected to an oil tank 16. The top of the suspension separator 18 is connected to a gas delivery pipe 27, and the leakage recovery pipe 2 is connected to the pipe body of the gas delivery pipe 27.

[0052] The suspension separator 18 is connected with a differential pressure gauge 19 and a liquid level gauge 21. The differential pressure gauge 19 is arranged close to the filter 20, and the liquid level gauge 21 is arranged close to the bottom of the suspension separator 18. A third valve 24 is connected to the pipe body of the oil delivery pipe 28, a second valve 23 is connected to the pipe body of the gas delivery pipe 27, a first valve 22 is connected to the pipe body of the leakage recovery pipe 2, and the first valve 22 is arranged close to the connection point between the leakage recovery pipe 2 and the gas delivery pipe 27. A fourth valve 25 is connected to the pipe body of the oil recovery pipe 17, and a pressure control gauge 26 is connected between the fourth valve 25 and the isolation chamber 3.

[0053] The piston 1 is connected with a gas valve 10, and the top of the piston 1 is connected with a piston cylinder head 9. Connecting a gas valve to the piston realizes the cyclic operation of the compressor.

[0054] Embodiment 7 The recovery and utilization method of the vertical reciprocating compressor separation and recovery system is specifically implemented according to the following steps: Step 1. The flywheel 7 drives the piston rod of the piston 1 to make a reciprocating motion through the crankshaft 14, and the oil-gas mixed medium in the isolation chamber 3 leaks into the oil recovery pipe 17. Step 2. The gas medium leaked from the cylinder 11 enters the leakage recovery pipe 2 and then enters the gas delivery pipe 27. Step 3. The oil-gas mixed medium in the oil recovery pipe 17 is collected and separated by the suspension separator 18. The process gas medium filters the lubricating oil through the filter 20, and the separated process gas is discharged into the compressor inlet through the gas delivery pipe 27 for recovery and utilization. Step 4. The lubricating oil separated in the suspension separator 18 enters the oil tank 16 through the oil delivery pipe 28 for recovery and utilization.

[0055] The working principle of the separation, recovery and utilization system of the vertical reciprocating compressor of the present invention is as follows: The motor drives the crankshaft 14 to make a circular motion through the flywheel 7. With the movement of the crankshaft 14, the shaft head pump 15 is externally connected to a pipeline to add lubricating oil to the oil tank 16. Under the action of the crosshead 13, the piston rod of the piston 1 is driven by the crankshaft 14 to make a linear reciprocating motion. The oil collecting pipe 17 collects the oil-gas mixed medium leaked from the isolation chamber 3 and discharges it into the suspension separator 18. The process gas medium leaked from the cylinder 11 is collected through the air leakage recovery pipe 2. The oil-gas mixed medium recovered through the oil collecting pipe 17 enters the suspension separator 18. The lubricating oil is filtered through the filter 20. The filtered process gas enters the compressor inlet through the gas transmission pipe 27 after being combined with the process gas medium recovered through the air leakage recovery pipe 2. The filtered lubricating oil is input into the oil tank 16 through the oil transmission pipe 28.

[0056] For the separation, recovery and utilization system of the vertical reciprocating compressor of the present invention, the process gas and the lubricating oil are separated. The process gas is recovered and returned to the first-stage inlet of the compressor for reuse, and the partial pressure of the isolation chamber is controlled to reduce the loss of the packing seal. The lubricating oil is centrally collected and timely discharged to the crankcase for recycling. The problems that the current unit operation leaks process gas, resulting in low operation efficiency of the unit and large leakage of the packing seal, are solved; the problems that the lack of lubricating oil causes insufficient lubrication of the unit and the liquid-carrying in the isolation chamber causes the liquid-carrying in the cylinder and frequent damage and shutdown of the gas valve are solved, and the maintenance frequency of the unit is reduced.

Claims

1. Vertical reciprocating compressor separation, recovery and utilization system, characterized in that It includes a compressor housing (4), an oil tank (16) is connected to the inner bottom surface of the compressor housing (4), a crankshaft (14) is connected to the inner wall of the compressor housing (4), the crankshaft (14) is arranged above the oil tank (16), one end of the crankshaft (14) is connected to a power assembly, a cylinder (11) is connected to the inner top surface of the compressor housing (4), a piston (1) is connected inside the cylinder (11), the piston rod of the piston (1) is connected to the crankshaft (14) through a crosshead (13), a separation chamber (3) is connected to the inner wall of the compressor housing (4), the separation chamber (3) is arranged below the cylinder (11), the separation chamber (3) is connected to a recovery assembly, the recovery assembly passes through the side wall of the compressor housing (4) and is connected to a separation system, and the separation system is connected to the oil tank (16).

2. The vertical reciprocating compressor separation, recovery and utilization system according to claim 1, characterized in that The power assembly includes a flywheel (7), one end of the crankshaft (14) passes through the side wall of the compressor housing (4) and is connected to the flywheel (7), a mechanical seal ring (8) is connected to the connection point where the crankshaft (14) passes through the side wall of the compressor housing (4), and the other end of the crankshaft (14) passes through the side wall of the compressor housing (4) and is connected to a shaft head pump (15).

3. The vertical reciprocating compressor separation, recovery and utilization system according to claim 1, characterized in that, The crosshead (13) is connected to the inner wall of the compressor housing (4) through a crosshead bushing (6).

4. The vertical reciprocating compressor separation, recovery and utilization system according to claim 1, characterized in that, The piston rod of the piston (1) passes through the bottom of the separation chamber (3), and a guide bearing (12) is connected to the connection point between the piston rod of the piston (1) and the separation chamber (3), and the piston rod of the piston (1) passes through the guide bearing (12).

5. The vertical reciprocating compressor separation, recovery and utilization system according to claim 1, characterized in that, The recovery assembly includes an oil collecting pipe (17), the oil collecting pipe (17) is connected to the bottom of the separation chamber (3), and one end of the oil collecting pipe (17) passes through the side wall of the compressor housing (4) and is connected to the separation system; It further includes a leakage recovery pipe (2), the leakage recovery pipe (2) is connected to the connection point where the piston rod of the piston (1) passes through the outer wall of the cylinder (11), and one end of the leakage recovery pipe (2) passes through the side wall of the compressor housing (4) and is connected to the separation system.

6. The vertical reciprocating compressor separation, recovery and utilization system according to claim 5, wherein The separation system includes a suspension separator (18), a filter (20) is connected inside the suspension separator (18), the oil collecting pipe (17) is connected to the suspension separator (18), the bottom of the suspension separator (18) is connected to an oil delivery pipe (28), the end of the oil delivery pipe (28) far from the suspension separator (18) is connected to the oil tank (16), the top of the suspension separator (18) is connected to a gas delivery pipe (27), and the leakage recovery pipe (2) is connected to the pipe body of the gas delivery pipe (27).

7. The vertical reciprocating compressor separation, recovery and utilization system according to claim 6, wherein The suspension separator (18) is connected with a differential pressure gauge (19) and a liquid level gauge (21). The differential pressure gauge (19) is arranged close to the filter (20), and the liquid level gauge (21) is arranged close to the bottom of the suspension separator (18). A third valve (24) is connected to the pipe body of the oil delivery pipe (28), a second valve (23) is connected to the pipe body of the gas delivery pipe (27), a first valve (22) is connected to the pipe body of the air leakage recovery pipe (2), and the first valve (22) is arranged close to the connection point of the air leakage recovery pipe (2) and the gas delivery pipe (27). A fourth valve (25) is connected to the pipe body of the oil collection pipe (17), and a pressure control gauge (26) is connected between the fourth valve (25) and the isolation chamber (3).

8. The vertical reciprocating compressor separation, recovery and utilization system according to claim 1, characterized in that, The piston (1) is connected with an air valve (10), and the top of the piston (1) is connected with a piston cylinder head (9).

9. The recycling method of the vertical reciprocating compressor separation and recycling system according to any one of claims 1-8, characterized in that, It is specifically implemented according to the following steps: Step 1. The flywheel (7) drives the piston rod of the piston (1) to make a reciprocating motion through the crankshaft (14), and the oil-gas mixed medium in the isolation chamber (3) leaks into the oil collection pipe (17). Step 2. The gas medium leaking from the cylinder (11) enters the air leakage recovery pipe (2) and then enters the gas delivery pipe (27). Step 3. The oil-gas mixed medium in the oil collection pipe (17) is collected and separated by the suspension separator (18). The process gas medium filters the lubricating oil through the filter (20), and the separated process gas is discharged into the compressor inlet through the gas delivery pipe (27) for recycling. Step 4. The lubricating oil separated in the suspension separator (18) enters the oil tank (16) through the oil delivery pipe (28) for recycling.

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