A gas compression system for recovering ionic liquid

Abstract

A gas compression system for recovering ionic liquid belongs to the technical field of compression pumps, and comprises a multi-stage compression pump connected in series. An exhaust port connected to an exhaust valve is arranged at the upper end of the compression pump. An ionic liquid reflux mechanism is arranged on each stage of the compression pump. The ionic liquid reflux mechanism comprises a compressed gas discharge flow channel, one end of the compressed gas discharge flow channel is connected to the exhaust port, and the other end is connected to the exhaust valve. The compressed gas discharge flow channel has a flow-blocking inner wall, and the flow-blocking inner wall is arranged opposite to the exhaust port. When the compressed gas containing the ionic liquid is discharged from the exhaust port, it will collide with the flow-blocking inner wall when passing through the compressed gas discharge flow channel, thereby forming turbulence. Most of the ionic liquid will be separated from the compressed gas and reflux into the compression pump, so as to realize the recovery of the ionic liquid. At the last stage of the compression pump, the ionic liquid in the compressed gas is separated and recovered again by the gas-liquid separation mechanism, so as to minimize the loss of the ionic liquid.

Description

Technical Field

[0001] The invention discloses a gas compression system for recovering ionic liquid, belonging to the technical field of compression pumps. Background Art

[0002] When compressing gases such as hydrogen, a gas compression pump is required. The hydraulic cylinder pushes the piston of the compression cylinder to reciprocate to achieve gas compression. During compression, if there is a large gap between the piston and the cylinder body, the compressed gas fills the gap and cannot be discharged, which will seriously reduce the compression efficiency.

[0003] When compressing hydrogen, in order to ensure the efficiency of the compression pump, ionic liquid will be injected into the compression chamber of the compression pump. The ionic liquid will fill the gap between the piston and the pump body when compressing the gas, thereby improving the efficiency of the compression pump. When the compression pump is working, some ionic liquid will always be discharged along with the compressed hydrogen, so it is necessary to frequently replenish the ionic liquid into the compression pump, which increases the workload and causes the loss of ionic liquid. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a gas compression system for recovering ionic liquid, which can make the ionic liquid reflux under the action of gravity and avoid mutual interference between the refluxed ionic liquid and the compressed gas.

[0005] The technical solution adopted by the present invention to solve the technical problem is: the gas compression system for recovering ionic liquid comprises a multi-stage compression pump connected in series, each stage of the compression pump is provided with an air inlet valve and an exhaust valve, and the upper end of the compression pump is provided with an exhaust port connected to the exhaust valve, characterized in that: each stage of the compression pump is provided with an ionic liquid reflux mechanism, and the exhaust valve outlet of the last stage of the compression pump is connected with a gas-liquid separation mechanism;

[0006] The ionic liquid reflux mechanism comprises a compressed gas discharge channel, one end of which is connected to the exhaust port and the other end is connected to the exhaust valve. The compressed gas discharge channel has a flow-blocking inner wall, which is arranged opposite to the exhaust port.

[0007] Preferably, the gas-liquid separation mechanism is a cyclone separator, a spiral air guide structure is provided in the cyclone separator, and the lower end of the cyclone separator is connected to the ion liquid recovery container or any one-stage compression pump through a pipeline.

[0008] Preferably, a float is provided at the lower end of the cyclone separator.

[0009] Preferably, the compressed gas discharge flow channel is bent, and an inner wall of one of the bent portions is the flow-blocking inner wall.

[0010] Preferably, the angle between the flow-blocking inner wall and the center line of the inlet end of the compressed gas discharge channel is an obtuse angle.

[0011] Preferably, the angle of the bend of the compressed gas discharge channel is 110-145°.

[0012] Preferably, the axis of the outlet end of the compressed gas discharge flow channel is coaxially arranged with the axis of the exhaust valve. The exhaust valve is also inclined, and the compressed gas discharged through the exhaust valve will still carry a small amount of ionic liquid, which will flow downward to the exhaust valve after separation in the pipeline. After the ionic liquid flows back, it will be stored on the lower side of the inclined valve core of the exhaust valve. When the valve core of the exhaust valve is opened, the ionic liquid flows back to the compression pump along the lower side of the exhaust valve, and the compressed gas is discharged through the upper part of the exhaust valve. The ionic liquid backflow will not affect the normal discharge of the compressed gas.

[0013] Preferably, an end cover is provided at the upper end of the compression pump, the air inlet valve and the air exhaust valve are both arranged on the end cover, and the compressed gas discharge flow channel is also opened on the inner side of the end cover.

[0014] Preferably, a temporary storage chamber is provided on the inner side of the upper end of the compression pump, and the lower end of the compressed gas discharge channel is connected to the temporary storage chamber.

[0015] Preferably, a groove is further provided on the inner side of the upper end of the compression pump, and the groove is provided on one side of the compressed gas discharge channel.

[0016] Preferably, the exhaust valve is tilted. A small amount of ionic liquid will still be discharged from the exhaust valve along with the compressed gas, and a small amount of ionic liquid will be separated from the compressed gas in the pipeline and then flow back to the exhaust valve. If the exhaust valve is set upright, when the exhaust valve is opened, the ionic liquid on the upper side of the exhaust valve will affect the normal discharge of the compressed gas. When the exhaust valve is tilted, the ionic liquid will be stored in the lower part of the inclined valve core of the exhaust valve after reflux. When the valve core of the exhaust valve is opened, the ionic liquid will flow back to the compression pump along the lower side of the exhaust valve, and the compressed gas will be discharged through the upper part of the exhaust valve. The reflux of the ionic liquid will not affect the normal discharge of the compressed gas.

[0017] Preferably, the compression pumps are arranged in series in 4-5 stages.

[0018] Preferably, the middle or upper part of the ionic liquid recovery device is connected with an air outlet pipe.

[0019] Preferably, the compression pump comprises a motor, a planetary transmission device, a cylinder, a transfer cylinder and a compression cylinder, the motor is connected to the input end of the planetary transmission device, the output end of the planetary transmission device is connected to the cylinder piston rod, a cylinder piston connected to the cylinder piston rod is provided in the cylinder, the transfer cylinder is arranged between the cylinder and the compression cylinder, a transfer piston is provided in the transfer cylinder, a compression piston is provided in the compression cylinder, and the transfer piston and the compression piston are connected via a force transmission piston rod;

[0020] The transfer cylinder and the compression cylinder are both arranged vertically, the cylinder piston rod is arranged horizontally, the cylinder is L-shaped, one end of the cylinder is connected to the lower end of the transfer cylinder, and the other end is connected to the outer shell of the cylinder piston rod. The cylinder is connected to a pressure regulating and oil replenishing mechanism.

[0021] Preferably, the pressure regulating and oil replenishing mechanism comprises a pressure regulating valve and an oil replenishing tank, one end of the pressure regulating valve is connected to the oil cylinder, and the other end is connected to the inlet of the oil replenishing tank, and the outlet of the oil replenishing tank is connected to the oil cylinder through a one-way valve;

[0022] The pressure regulating valve includes a valve body, a valve core, a spring and a lifting rod. The valve core is lifted and lowered in the valve body. The lower end of the lifting rod is movably connected to the valve core. The spring is set in the valve body and presses the valve core downward. The valve core can achieve pressure regulation. High-pressure hydraulic oil can enter the oil replenishment tank through the valve core. The valve core can also be lifted by the lifting rod to discharge the gas in the compression pump.

[0023] The planetary transmission device includes a planetary gear assembly, a crankshaft gear and a reciprocating internal gear ring. The last-stage planet carrier of the planetary gear assembly is rotatably arranged, and the crankshaft gear is rotatably arranged on the last-stage planet carrier. The reciprocating internal gear ring is fixedly arranged in the outer shell, and the crankshaft gear is meshed with the inner side of the reciprocating internal gear ring. The pitch circle diameter of the reciprocating internal gear ring is twice the pitch circle diameter of the crankshaft gear. The output shaft is eccentrically connected to the crankshaft gear, and the piston rod is rotatably connected to the output shaft, and the central axis of the output shaft coincides with the pitch circle of the crankshaft gear.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The gas compression system is provided with an ion liquid reflux mechanism on each stage of the compression pump. When the compressed gas containing the ion liquid is discharged from the exhaust port, it will collide with the inner wall of the flow resistance when passing through the compressed gas discharge flow channel, thereby forming turbulence. Due to the high density of the ion liquid, under the action of gravity, most of the ion liquid will be separated from the compressed gas and reflux into the compression pump to achieve the recovery of the ion liquid. At the last stage of the compression pump, the ion liquid in the compressed gas is separated and recovered again by the gas-liquid separation mechanism to minimize the loss of the ion liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the gas compression system for recovering ionic liquid.

[0027] Figure 2 A cross-sectional view of the end cap.

[0028] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0029] Figure 4 Schematic diagram of the end cover connected to the cyclone separator.

[0030] Figure 5 This is a schematic diagram of the structure of the compression pump.

[0031] Figure 6 It is a schematic diagram of the structure of a planetary transmission.

[0032] Figure 7 It is a structural diagram of the pressure regulating valve.

[0033] In the figure: 1, storage tank 2, compression pump 3, end cover 4, cyclone separator 5, flange 6, intake valve 7, exhaust valve 200, exhaust port 301, intake hole 302, exhaust hole 303, compressed gas discharge channel 304, flow blocking inner wall 305, groove 8, temporary storage chamber 9, exhaust pipe 10, return pipe 11, float 12, outlet pipe 13, intake pipe 201, motor 202, planetary transmission device 203, cylinder piston rod 204, eccentric shaft 205, eccentric sleeve 206, cylinder piston 207, cylinder 208, pressure regulating valve 209, oil replenishment tank 210, transmission cylinder 211, force transmission piston rod 212, transmission piston 2 13. Compression piston 214, partition 215, compression cylinder 20201, first sun gear 20202, first planetary carrier 20203, first planetary gear 20204, first inner ring gear 20205, second sun gear 20206, second planetary gear 20207, second planetary carrier 20208, second inner ring gear 20209, crankshaft gear 20210, reciprocating inner ring gear 20211, crankshaft 20801, valve body 20802, pressure regulating inlet 20803, pressure regulating outlet 20804, valve core 20805, lifting block 20806, fixing cover 20807, lifting rod 20808, spring. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still belong to the scope of protection of the present application.

[0035] The following is combined with Figure 1-7 The present invention is further described.

[0036] See also Figure 1The gas compression system for recovering ionic liquid comprises a multi-stage series-connected compression pump 2, each stage of the compression pump 2 is provided with an inlet valve 6 and an exhaust valve 7, both of which are one-way valves, the inlet valve 6 allows gas to enter the compression pump 2, and the exhaust valve 7 allows gas in the compression pump 2 to be discharged. An exhaust port 201 connected to the exhaust valve 7 is provided at the upper end of the compression pump 2, and an ionic liquid reflux mechanism is provided on each stage of the compression pump 2, the inlet valve 6 of the first stage of the compression pump 2 is connected to the storage tank 1, and the outlet of the exhaust valve 7 of the last stage of the compression pump 2 is connected to a gas-liquid separation mechanism. The ionic liquid in the compression pump 2 is refluxed by the ionic liquid reflux mechanism, and then the ionic liquid is recovered again by the gas-liquid separation mechanism connected to the last stage of the compression pump 2, thereby reducing the loss of the ionic liquid and reducing the number of times the ionic liquid is replenished. The compression pump 2 in this embodiment is arranged in series with 5 stages.

[0037] See also Figure 2 The upper end of the compression pump 2 is provided with an end cover 3, and the air inlet valve 6 and the exhaust valve 7 are both provided on the end cover 3. The end cover 3 is provided with an air inlet hole 301 and an exhaust hole 302, the air inlet valve 6 is installed in the air inlet hole 301, the air inlet hole 301 is vertically arranged, and the exhaust valve 7 is installed in the exhaust hole 302.

[0038] The ion liquid reflux mechanism includes a compressed gas discharge channel 303, which is opened on the inner side of the end cover 3, one end of the compressed gas discharge channel 303 is connected to the exhaust port 200, and the other end is connected to the exhaust valve 7, and the compressed gas discharge channel 303 has a flow-blocking inner wall 304, which is arranged opposite to the exhaust port 200.

[0039] The compressed gas discharge flow channel 303 is bent, and the inner wall of one of the bent parts forms the above-mentioned flow-blocking inner wall 304. The compressed gas mixed with the ionic liquid enters the compressed gas discharge flow channel 303 after being discharged from the exhaust port 200. In the compressed gas discharge flow channel 303, the compressed gas will collide with the flow-blocking inner wall 304, thereby forming turbulence, making the state of the ionic liquid in the compressed gas unstable, so that the ionic liquid is separated from the compressed gas and flows back to the inside of the compression pump 2.

[0040] The angle between the flow-blocking inner wall 304 and the center line of the inlet end of the compressed gas discharge channel 303 in this embodiment is an obtuse angle. The obtuse angle structure can realize the separation of the ionic liquid and the compressed gas while having relatively small discharge resistance to the compressed gas, thereby avoiding affecting the normal operation of the compression pump 2. Specifically, the angle at the bend of the compressed gas discharge channel 303 in this embodiment is preferably 110-145°.

[0041] A flange 5 is provided on the outer periphery of the end cover 3, and an annular platform is provided at the lower part of the end cover 3. The end cover 3 is fixed to the upper end of the compression pump 2 through the flange 5. The bottom of the end cover 3 is higher than the bottom of the flange 5, and a temporary storage chamber 8 is formed in the flange 5 at the lower part of the end cover 3. The lower end of the compressed gas discharge channel 303 is connected to the temporary storage chamber 8. During the exhaust stroke, the piston in the compression pump 2 moves upward to the end cover 3, and the ionic liquid is temporarily stored in the temporary storage chamber 8 and fills the clearance between the pump body and the piston. The compressed gas is discharged, thereby improving the efficiency of the compression pump 2. At the same time, the refluxed ionic liquid also flows back to the temporary storage chamber 8.

[0042] See also Figure 3 , the exhaust valve 7 in this embodiment is arranged at an angle. A small amount of ionic liquid will be discharged from the exhaust valve 7 along with the compressed gas, and part of the ionic liquid in the pipeline will be separated from the compressed gas and flow back to the exhaust valve 7. If the exhaust valve 7 is arranged upright, when the exhaust valve 7 is opened, the ionic liquid on the upper side of the exhaust valve 7 will affect the normal discharge of the compressed gas, while when the exhaust valve 7 is arranged at an angle, the ionic liquid will be stored in the lower part of the inclined valve core of the exhaust valve 7 after the ionic liquid flows back. When the valve core of the exhaust valve 7 is opened, the ionic liquid flows back to the compression pump 2 along the lower side of the exhaust valve 7, and the compressed gas is discharged through the upper part of the exhaust valve 7. The ionic liquid backflow will not affect the normal discharge of the compressed gas.

[0043] A groove 305 is further provided on the lower side of the end cover 3 , and the groove 305 is provided between the lower end of the air inlet 301 and the lower end of the air outlet 302 to further accommodate the refluxed ionic liquid.

[0044] See also Figure 4 The gas-liquid separation mechanism in this embodiment is a cyclone separator 4, which is connected to the exhaust valve 7 through an exhaust pipe 9. The middle or upper part of the cyclone separator 4 is connected to an exhaust pipe 12, and the separated gas is discharged through the exhaust pipe 12. A spiral air guide structure is provided in the cyclone separator 4, and the lower end of the cyclone separator 4 is connected to the ion liquid recovery container or the last stage compression pump 2 through a reflux pipe 10. The compressed gas carrying a small amount of ionic liquid enters the cyclone separator 4. During the spiral flow, the ionic liquid is separated from the compressed gas and collected. A float 11 is provided at the lower end of the cyclone separator 4. The float 11 closes the liquid outlet of the cyclone separator 4. After the ionic liquid is separated, it flows downward to the float 11. When the ionic liquid reaches a certain amount, the float 11 floats up, and the ionic liquid flows downward out of the cyclone separator 4.

[0045] The spiral air-guiding structure in the cyclone separator 4 can be a spiral blade, but it is more preferably a spiral spring. Under the guiding action of the spiral spring, the compressed air enters the cyclone separator 4 and realizes gas-liquid separation under the guiding action of the spiral spring. The air outlet of the cyclone separator 4 is connected to the air outlet pipe 12, and the liquid outlet of the cyclone separator 4 is connected to the air inlet valve 6, and the air inlet valve 6 is also connected to the air inlet pipe 13.

[0046] See also Figure 5 The compression pump 2 in this embodiment includes a motor 201, a reducer, a cylinder piston rod 203, a cylinder 207, a transfer cylinder 210 and a compression cylinder 215. The motor 201 is connected to the input end of the reducer, and the output end of the reducer is connected to and drives the cylinder piston rod 203 to slide back and forth. The cylinder 207 is provided with a cylinder piston 206 connected to the cylinder piston rod 207. The transfer cylinder 210 is connected between the cylinder 207 and the compression cylinder 215. The transfer cylinder 210 is provided with a transfer piston 212. The compression cylinder 215 is provided with a compression piston 213. The transfer piston 212 and the compression piston 213 are connected through a force transmission piston rod 211.

[0047] The oil cylinder piston rod 203 drives the oil cylinder piston 206 to work in the oil cylinder 207, and the hydraulic oil in the oil cylinder 207 pushes the transmission piston 212 to move and work in the transmission cylinder 210. The transmission piston 212 drives the compression piston 213 to move and work in the compression cylinder 215 through the force transmission piston rod 211. The transmission piston 212 transmits the power of the oil cylinder 207 to the compression cylinder 215. While realizing the power transmission, a seal is formed between the compression cylinder 215 and the oil cylinder 207 to prevent the hydraulic oil from entering the compression cylinder 215. Further, a partition 214 is provided between the compression cylinder 215 and the transmission cylinder 210, and the cavity between the transmission piston 212 and the compression piston 213 is filled with inert gas. The partition 214 has a hole and is connected to a pressure detection unit. The pressure detection unit is used to detect whether the compression cylinder 215 is leaking. If the pressure of the inert gas decreases, it means that the compression cylinder 215 is leaking, and the piston is repaired or replaced in time.

[0048] In this embodiment, the two oil cylinders 203 are symmetrically arranged on both sides of the reducer, the transfer cylinder 210 and the compression cylinder 215 are vertically arranged on both sides of the reducer, and the compression cylinders 215 on both sides of the reducer work alternately. The intake pressure of one compression cylinder 215 can be used as the power of another compression cylinder 215.

[0049] The oil cylinder 207 is L-shaped, and the horizontal power of the oil cylinder piston 203 is converted into vertical force, and the compression cylinder 215 is vertically arranged so as to retain the ionic liquid in the compression cylinder 215. However, the vertical side wall of the oil cylinder 207 opposite to the oil cylinder piston 206 is subjected to a large pressure. If the pressure is too large, it is easy to cause damage to the cylinder body. For this reason, in this embodiment, a pressure regulating valve 208 is provided on the side wall of the oil cylinder 207 opposite to the oil cylinder piston 206. One end of the pressure regulating valve 208 is connected to the oil cylinder 207, and the other end is connected to the inlet of the oil replenishing tank 209. The outlet of the oil replenishing tank 209 is connected to the oil cylinder 207 through a one-way valve. When the pressure is large, the excess hydraulic oil enters the oil replenishing tank 209 through the pressure regulating valve 208. When the hydraulic oil in the oil cylinder 207 is insufficient, the hydraulic oil in the oil replenishing tank 209 enters the oil cylinder 207 through the one-way valve, so as to prevent the high-pressure hydraulic oil from damaging the cylinder body and ensure that there is enough hydraulic oil in the oil cylinder 207.

[0050] See also Figure 6 The reducer in this embodiment is a planetary transmission device 202, which includes a first sun gear 20201, a first planet carrier 20202, a first planetary gear 20203, a first inner gear ring 20204, a second sun gear 20205, a second planet carrier 20207, a second planetary gear 20206, and a second inner gear ring 20208. The first planet carrier 20202 and the second planet carrier 20207 are both rotatably arranged, the first inner gear ring 20204 and the second inner gear ring 20208 are fixedly arranged, the first planetary gear 20203 is rotatably arranged on the first planet carrier 20202 and meshes with the first sun gear 20201 and the first inner gear ring 20204 respectively, and the second sun gear 20205 is connected to the first planet carrier 20202 The second planetary gear 20206 is arranged on the second planetary carrier 20207 and meshes with the second sun gear 20205 and the second inner ring gear 20208 respectively. A reciprocating swinging inner ring gear 20210 is also fixedly arranged on one side of the second inner ring gear 20208. A crankshaft gear 20209 is rotatably arranged on the second planetary carrier 20207. The crankshaft gear 20209 meshes with the reciprocating swinging inner ring gear 20210. The crankshaft gear 20209 is connected to an eccentric shaft 204 through a crankshaft 20211. The eccentric shaft 205 is eccentrically arranged on the crankshaft 20211, and an eccentric sleeve 205 is arranged on the lower side of the reducer. The eccentric sleeve 205 is rotatably arranged on the outside of the eccentric shaft 20211, and the cylinder piston rod 203 is connected to the outside of the eccentric sleeve 205.

[0051] The pitch circle diameter of the reciprocating inner gear ring 20210 in this embodiment is twice the pitch circle diameter of the crankshaft gear 20209, and the center axis of the eccentric shaft 204 coincides with the pitch circle of the crankshaft gear 20209. During the rotation of the second planetary carrier 20207, the crankshaft gear 20209 is driven to rotate inside the reciprocating inner gear ring 20210. Since the pitch circle diameter of the reciprocating inner gear ring 20210 is twice the pitch circle diameter of the crankshaft gear 20209, the point on the pitch circle of the crankshaft gear 20209 reciprocates along the pitch circle diameter of the reciprocating inner gear ring 20210, thereby causing the eccentric shaft 204 to reciprocate instead of rotating, converting the motion of the planetary gear into reciprocating motion, replacing the crankshaft connecting rod structure and the oil cylinder, and utilizing the planetary gear transmission assembly to realize the conversion of rotational motion into linear reciprocating motion, thereby reducing the volume of the compressor and achieving a larger stroke in a smaller volume.

[0052] See also Figure 7 The pressure regulating valve 208 includes a valve body 20801, a lifting rod 20807, a valve core 20804 and a spring 20808. A pressure regulating inlet 20802 is provided on one side of the valve body 20801, and a pressure regulating outlet 20803 is provided on the other side. The valve core 20804 is movably arranged at the lower end of the valve stem 38. The pressure regulating inlet 20802 is connected to the lower side of the valve core 20804. A fixed cover 20806 is connected to the upper end of the valve core 20804. A cavity is formed between the fixed cover 20806 and the valve core 20804. A lifting block 20805 is provided at the lower end of the lifting rod 20807. The lifting block 20805 is lifted and lowered in the cavity, so that the lifting rod 20807 and the valve core 20804 can move relatively, and the lifting rod 20807 does not affect the lifting and lowering of the valve core 20804. The spring 20808 is arranged in the valve body 20801 and presses the fixed cover 20806 downward, so that the pressure regulating valve 208 is usually in a closed state. When the pressure of the hydraulic oil in the oil cylinder 207 is too large, the hydraulic oil pushes the valve core 20804 upward, so that the hydraulic oil in the oil cylinder 207 enters from the pressure regulating inlet 20802 to push up the valve core 20804, and the hydraulic oil enters the oil replenishing tank 209 through the pressure regulating outlet 20803 to prevent the high-pressure hydraulic oil from damaging the oil cylinder 207. When the pressure of the hydraulic oil in the oil cylinder 207 drops to a safe value, the spring 20808 presses the valve core 20804 downward to close the pressure regulating inlet 20802. After the hydraulic oil in the oil cylinder 207 is reduced due to problems such as sealing, the hydraulic oil can be replenished to the oil cylinder 209 through the oil replenishing tank 209 to ensure the stable operation of the oil cylinder 207.

[0053] The pressure regulating valve 208 can also be used as a vent valve. When adding hydraulic oil to the oil cylinder 207, gas is likely to exist. By manually lifting the lifting rod 20807 to open the valve core 20804, the gas in the oil cylinder 207 can be discharged, so that the hydraulic oil can smoothly enter the oil cylinder 207 during the first use. The lifting rod 20807 is threadedly connected to the valve body 20801. The lifting rod 20807 has a certain limit effect on the valve core 20804, and does not affect the lifting and lowering of the valve core 20804. The lifting rod 20807 is rotated to realize the lifting of the valve core 20804.

[0054] Working process: The gas in the storage tank 1 is compressed step by step by each level of compression pump 2 until it is compressed to the required pressure, and finally the compressed gas is sent to the high-pressure tank or gas-using equipment through the cyclone separator 4. During the discharge process of the compressed gas in the compression pump 2, the compressed gas enters the compressed gas discharge channel 303 through the exhaust hole 301. In the compressed gas discharge channel 303, the compressed gas collides with the flow-blocking inner wall 304, thereby forming turbulence, so that the ionic liquid is separated from the compressed gas and flows back to the inside of the compression pump 2. Part of the ionic liquid in the compressed gas discharged through the exhaust valve 7 flows back to the inclined lower part of the valve core of the exhaust valve 7. When the valve core of the exhaust valve 7 is opened, the ionic liquid flows back to the compression pump 2 along the lower side of the exhaust valve 7, and the compressed gas is discharged through the upper part of the exhaust valve 7. The compressed air discharged from the last stage of the compression pump 2 enters the cyclone separator 4. After gas-liquid separation in the cyclone separator 4, the compressed gas is sent to the high-pressure tank or gas-using equipment, and the ionic liquid is discharged to the ionic liquid recovery tank or any stage of the compression pump 2 after passing through the float 11.

[0055] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A gas compression system for recovering ionic liquid, comprising a plurality of compression pumps connected in series, each compression pump being provided with an inlet valve and an exhaust valve, and an exhaust port connected to the exhaust valve being provided at the upper end of the compression pump, characterized in that: Each stage of the compression pump is provided with an ion liquid reflux mechanism, and the exhaust valve outlet of the last stage of the compression pump is connected to a gas-liquid separation mechanism; The ionic liquid reflux mechanism comprises a compressed gas discharge flow channel, one end of the compressed gas discharge flow channel is connected to the exhaust port, and the other end is connected to the exhaust valve, and the compressed gas discharge flow channel has a flow-blocking inner wall, and the flow-blocking inner wall is arranged opposite to the exhaust port; The compression pump comprises a motor, a planetary transmission device, a cylinder, a transfer cylinder and a compression cylinder, wherein the motor is connected to the input end of the planetary transmission device, the output end of the planetary transmission device is connected to the cylinder piston rod, a cylinder piston connected to the cylinder piston rod is arranged in the cylinder, the transfer cylinder is arranged between the cylinder and the compression cylinder, a transfer piston is arranged in the transfer cylinder, a compression piston is arranged in the compression cylinder, and the transfer piston and the compression piston are connected via a force transmission piston rod; The transmission cylinder and the compression cylinder are both arranged vertically, the cylinder piston rod is arranged horizontally, the cylinder is L-shaped, one end of the cylinder is connected to the lower end of the transmission cylinder, and the other end is connected to the outer shell of the cylinder piston rod. The cylinder is connected to a pressure regulating and oil replenishing mechanism; The planetary transmission device includes a planetary gear assembly, a crankshaft gear and an inner ring gear. The last-stage planet carrier of the planetary gear assembly is rotatably arranged, and the crankshaft gear is rotatably arranged on the last-stage planet carrier. The inner ring gear is fixedly arranged in the outer shell, and the crankshaft gear is meshed with the inner side of the inner ring gear. The pitch circle diameter of the inner ring gear is twice the pitch circle diameter of the crankshaft gear. The eccentric shaft is eccentrically connected to the crankshaft gear, and the cylinder piston rod is rotatably connected to the eccentric shaft. The center axis of the eccentric shaft coincides with the pitch circle of the crankshaft gear; the point on the pitch circle of the crankshaft gear will reciprocate along the pitch circle diameter of the inner ring gear, thereby causing the eccentric shaft to reciprocate.

2. The gas compression system for recovering ionic liquid according to claim 1, characterized in that: The gas-liquid separation mechanism is a cyclone separator, in which a spiral air guide structure is arranged, and the lower end of the cyclone separator is connected to an ion liquid recovery container or any first-stage compression pump through a pipeline.

3. The gas compression system for recovering ionic liquid according to claim 2, characterized in that: A floating ball is arranged at the lower end of the cyclone separator.

4. The gas compression system for recovering ionic liquid according to claim 1, characterized in that: The compressed gas discharge flow channel is bent, and the inner wall of one of the bent parts is the flow-blocking inner wall.

5. The gas compression system for recovering ionic liquid according to claim 4, characterized in that: The angle between the flow-blocking inner wall and the center line of the inlet end of the compressed gas discharge flow channel is an obtuse angle.

6. The gas compression system for recovering ionic liquid according to claim 4 or 5, characterized in that: The angle of the compressed gas discharge channel at the bend is 110-145°.

7. The gas compression system for recovering ionic liquid according to claim 4, characterized in that: The axis of the outlet end of the compressed gas discharge flow channel is coaxially arranged with the axis of the exhaust valve.

8. The gas compression system for recovering ionic liquid according to claim 1, characterized in that: A temporary storage cavity is arranged inside the upper end of the compression pump, and the lower end of the compressed gas discharge flow channel is communicated with the temporary storage cavity.

9. The gas compression system for recovering ionic liquid according to claim 1, characterized in that: The pressure regulating and oil replenishing mechanism comprises a pressure regulating valve and an oil replenishing tank, one end of the pressure regulating valve is connected to the oil cylinder, and the other end is connected to the inlet of the oil replenishing tank, and the outlet of the oil replenishing tank is connected to the oil cylinder through a one-way valve; The pressure regulating valve comprises a valve body, a valve core, a spring and a lifting rod. The valve core is lifted and lowered in the valve body. The lower end of the lifting rod is movably connected to the valve core. The spring is arranged in the valve body and presses the valve core downward.

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