Energy-saving gas pump station separation and purification system

Abstract

This invention relates to the technical field of gas extraction, and in particular to an energy-saving gas pump station separation and purification system. It includes a cyclone dust collector, a main extraction pump, and a working fluid filtration mechanism. The outlet of the cyclone dust collector is connected to the inlet of the main extraction pump. The working fluid filtration mechanism includes a solid-gas-liquid separator, a booster pump, and a return pump. The solid-gas-liquid separator includes a separation tank, a solid-gas-liquid separation element, and an orifice plate assembly. The orifice plate assembly divides the separation tank into interconnected secondary separation chambers, a primary separation chamber, and a liquid collection chamber from top to bottom. The solid-gas-liquid separation element is installed in the secondary separation chamber. The solid-gas-liquid separation element includes multiple guide tubes, multiple flow guide filters built into the guide tubes, and a liquid distribution plate for supplying liquid to the multiple guide tubes. The flow guide filters include mounting rods and multiple inclined guide plates evenly distributed on the mounting rods. This system can effectively reduce the amount of coal ash particles in the working fluid, reduce the uneven wear rate of the water ring pump chamber, and save working fluid.

Description

Technical Field

[0001] This invention relates to the technical field of gas extraction, and in particular to an energy-saving gas pump station separation and purification system. Background Technology

[0002] Gas explosions are one of the most serious safety accidents in coal mines, and are known as the "number one killer in coal mines" due to their suddenness and extreme destructiveness. Therefore, before or during coal mining, it is necessary to construct boreholes and roadways on the ground or underground, and use the negative pressure generated by extraction equipment (vacuum pumps, pipelines, etc.) to actively extract the gas (mainly methane) contained in the coal seam and surrounding rock and transport it to a safe location or facility.

[0003] For example, patent application CN108661696B discloses a fully enclosed energy-saving system for gas extraction pumps based on drag-reducing working fluid. This system includes a gas purification system, a gas extraction pump working fluid circulation system, a replenishment system, and a supervisory control and data acquisition (SCADA) system. The gas in the extraction pipeline carries some coal ash, which is then purified by a cyclone dust suppression device. This system can significantly improve the operating efficiency and water-saving capacity of gas extraction pump stations, significantly reduce the cost of drag-reducing fluid, save manpower and resources, and has wide applications.

[0004] However, gas extraction carries a large amount of coal ash particles. Although cyclone dust suppression devices can handle some of the coal ash particles, some still enter the working fluid (usually water) circulation system of the gas extraction pump (water ring pump, etc.) and circulate with the working fluid, further accumulating. The high-speed particulate-containing liquid flow returning from the high-pressure exhaust zone to the low-pressure zone will concentrate near the exhaust zone, causing the strongest "cutting" or "erosion" on the inner wall of the pump cavity here. This results in uneven wear of the pump cavity, and the inner wall of the pump cavity is no longer a regular cylinder, but rather "wavy" or "elliptical" in the circumferential direction. The irregular inner cavity shape destroys the stability of the water ring, thereby affecting the extraction efficiency and potentially inducing aerodynamic noise and mechanical vibration.

[0005] Currently, coal ash particles are often treated by periodically changing the working fluid. However, frequent changes to the working fluid require equipment shutdown, affecting normal gas extraction and wasting the working fluid. How to reduce uneven wear of the pump chamber by coal ash particles, reduce the frequency of working fluid changes, and minimize working fluid waste has become an urgent problem to be solved. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an energy-saving gas pump station separation and purification system that further reduces the amount of coal ash particles in the working fluid, lowers the uneven wear rate of the water ring pump chamber, and saves working fluid.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving gas pump station separation and purification system, comprising a cyclone dust removal mechanism, a main pump, and a working fluid filtration mechanism, wherein the outlet of the cyclone dust removal mechanism is connected to the inlet of the main pump; characterized in that the working fluid filtration mechanism comprises a separation tank, a solid-gas-liquid separator, a booster pump, and a reflux pump; the separation tank is provided with an orifice plate assembly, which divides the separation tank from top to bottom into a secondary separation chamber, a primary separation chamber, and a liquid collection chamber that are interconnected; the outlet of the main pump is connected to the primary separation chamber; the solid-gas-liquid separator is installed in the secondary separation chamber; and the reflux pump is used to replenish the working fluid in the liquid collection chamber to the main pump.

[0008] The solid-gas-liquid separator includes multiple guide tubes, an inclined guide plate, and a porous filter layer installed on top of the inclined guide plate. The lift pump is used to lift the liquid working fluid at the bottom of the separator to the upper part of the guide tube.

[0009] An installation rod is fixed inside the guide tube, and multiple inclined guide plates are fixed on the installation rod, with adjacent inclined guide plates having opposite inclination directions;

[0010] The upper part of the guide tube is also provided with a liquid distribution plate, and the lifting pump lifts the liquid working fluid at the bottom of the separation tank into the liquid distribution plate.

[0011] Furthermore, the ends of the multiple inclined guide plates near the mounting rod are all inclined downwards, and the two adjacent inclined guide plates are located on both sides of the mounting rod; the porous filter media layer can be activated carbon filter media, volcanic rock filter media, ceramsite filter media, etc.

[0012] The spacing between two adjacent inclined guide plates should at least ensure that the liquid flow from the upper inclined guide plate to the connection between the lower inclined guide plate and the guide cylinder is adequate. One end of the inclined guide plate near the mounting rod extends beyond the mounting rod to ensure the liquid flows smoothly to the porous filter layer on the lower inclined guide plate. The separation tank is equipped with an exhaust pipe communicating with the interior of the secondary separation chamber. Furthermore, the top of the separation tank is detachably fitted with a cap, the mounting rod is a threaded rod, and a bow frame is installed at the bottom of the guide cylinder. The threaded rod is screwed onto the bow frame to facilitate the complete removal of the guide filter for cleaning or replacement. It should be noted that the liquid flow rate inside the guide cylinder should not be too high to prevent interference with the passage of gas.

[0013] The liquid distribution plate includes a plate body and multiple liquid distribution grooves installed at the bottom of the plate body. The liquid distribution grooves are arranged correspondingly to the guide cylinder, and the liquid distribution grooves are provided with multiple circumferentially distributed liquid flow holes.

[0014] Furthermore, the flow hole is located above the inner wall of the guide tube near the guide tube; a gap is left between the bottom of the disc and the top of the guide tube to allow the gas flow to pass through; the flow rate of the working fluid entering the guide tube can be controlled by changing the diameter and number of the flow holes, or a flow adjustment valve can be installed at the flow hole to adjust the flow rate of the working fluid entering the guide tube.

[0015] The solid-gas-liquid separator also includes multiple cyclone separators. The primary separation chamber is provided with a spacer plate, which divides the primary separation chamber into an upper chamber and a lower chamber. The multiple cyclone separators are evenly distributed in the lower chamber.

[0016] The cyclone separator includes a diverter tube and a cyclone guide. Multiple through holes corresponding to the cyclone separator are provided between the lower cavity and the liquid collection cavity. The top of the diverter tube passes through a perforated plate and communicates with the upper cavity. The bottom of the diverter tube extends into the liquid collection cavity through the through holes. The cyclone guide is installed at the junction of the diverter tube and the through holes. The cyclone guide includes two arc-shaped plates and a top plate and a bottom plate fixedly installed on the diverter tube. The two arc-shaped plates, the top plate, and the bottom plate form a cyclone cavity, which communicates with the liquid collection cavity. Multiple constricted tubes corresponding to the cyclone guide are installed on the top of the liquid collection cavity. Two cyclone inlets facing opposite directions are formed between the two arc-shaped plates.

[0017] Furthermore, the inner diameter of the through hole is larger than the outer diameter of the diverter tube to allow airflow to pass through; the air inlet of the guide tube is connected to the upper part of the upper cavity, the two arc-shaped plates are located between the top plate and the bottom plate and are symmetrically staggered, the inside of the constricted tube is connected to the inside of the vortex cavity, and the small diameter end of the constricted tube faces downward; the air outlet of the main pump is connected to the lower cavity, and one of the vortex air inlets faces the connection between the air outlet of the main pump and the lower cavity.

[0018] Preferably, a heat exchange box is installed at the top of the lower cavity, and multiple diversion pipes pass through the heat exchange box; furthermore, the separation tank is equipped with necessary functional pipes or valves such as a refrigerant inlet pipe and a refrigerant outlet pipe communicating with the inside of the heat exchange box, as well as a vent pipe and a temperature sensor, which will not be described in detail here.

[0019] Preferably, the main pump includes two pump end seats, a cylindrical pump body, and an eccentric impeller. The cylindrical pump body is rotatably mounted between the two pump end seats, and the eccentric impeller is rotatably mounted at the eccentric part of the pump cavity formed by the pump end seats and the cylindrical pump body.

[0020] Preferably, the rotary drive component includes a mounting base fixedly mounted on the pump end seat, a rotating shaft rotatably mounted on the mounting base, a drive gear fixedly mounted on the rotating shaft, a gear ring fixedly mounted on the cylindrical pump body, a ratchet fixedly mounted on the rotating shaft, a drive handle rotatably mounted on the rotating shaft, ratchet teeth hinged to the drive handle, and a torsion spring. The drive gear meshes with the gear ring, the ratchet teeth are elastically connected to the drive handle via the torsion spring, the ratchet teeth mesh with the ratchet teeth, and a telescopic cylinder is hingedly mounted on the mounting base. The extended end of the telescopic cylinder is hinged to the drive handle. Further, the telescopic cylinder can be an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder, and the telescopic cylinder is provided with telescopic kinetic energy through an external power supply system, hydraulic system, or pneumatic system.

[0021] Preferably, the cyclone dust removal mechanism includes a horizontal cyclone and a vertical cyclone. The horizontal cyclone includes a cylindrical body, a fixed guide impeller installed at the air inlet of the cylindrical body, and a cyclone booster installed in the middle of the cylindrical body. The cyclone booster includes a conical hollow guide shroud fixedly installed inside the cylindrical body, a moving impeller rotatably installed at the end of the conical hollow guide shroud, and a driver that provides power for the rotation of the moving impeller. The outlet end of the cylindrical body is provided with a vortex outlet channel. The air inlet end of the vertical cyclone is connected to the air outlet end of the vortex outlet channel. The top gas outlet end of the vertical cyclone is internally connected to the air inlet port of the cylindrical body. Further, the driver is installed inside the conical hollow guide shroud. The driver is preferably an electric motor, but a hydraulic motor or pneumatic motor or other equivalent components can also be used.

[0022] Preferably, it also includes a reflux pipe, on which a heat exchanger is installed. One end of the reflux pipe is connected to the outlet end of the reflux pump, and the other end of the reflux pipe is connected to the interior of the main pump. Furthermore, the reflux pipe is equipped with necessary functional valves such as a temperature sensor, an electromagnetic flow meter, and valves, which will not be described in detail here. The heat exchanger is connected to an external cooling water device to cool the working fluid flowing through the reflux pipe.

[0023] Preferably, the solid-gas-liquid separator further includes a sedimentation tank, the separation tank is installed on the top of the sedimentation tank, the liquid collection chamber is connected to the inside of the sedimentation tank, the input end of the lift pump extends to the bottom of the sedimentation tank, and the input end of the reflux pump extends to the upper part of the sedimentation tank.

[0024] Furthermore, the sedimentation tank is equipped with a necessary liquid level observation port, and the liquid level in the sedimentation tank should be higher than the inlet height of the reflux pump.

[0025] Compared with the prior art, the present invention provides an energy-saving gas pump station separation and purification system with the following beneficial effects: In this energy-saving gas pump station separation and purification system, the gas gas flow containing coal ash particles drawn by the main pump enters the separation tank. The gas flow pressure decreases upon entering the separation tank, and water vapor and coal ash particles form droplets that eventually settle in the liquid collection chamber. Meanwhile, the lift pump lifts the settling working fluid from the bottom of the separation tank to the liquid distribution plate and distributes it to each solid-gas-liquid separation component. The working fluid flows down from each inclined guide plate in the guide tube and forms water. In the working fluid, coal ash particles are filtered and trapped by a porous filter layer. After entering the guide tube, the gas travels along a tortuous path. Small droplets in the gas come into contact with the working fluid flowing in the guide tube and are further captured. This achieves effective gas-liquid separation, reduces the amount of working fluid carried out during gas discharge, and further filters and removes coal ash particles entering the working fluid, further reducing the amount of coal ash particles in the working fluid. This reduces the uneven wear rate of the water ring pump chamber, extends the replacement interval of the working fluid, and greatly saves the amount of working fluid used. Attached Figure Description

[0026] Figure 1 This is a top-view planar structural diagram of the present invention.

[0027] Figure 2 This is the invention Figure 1 Schematic diagram of the cross-sectional structure at point AA.

[0028] Figure 3 This is a schematic diagram of the cross-sectional plane structure of the main pump of the present invention.

[0029] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0030] Figure 5 This is a three-dimensional structural diagram of the solid-gas-liquid separator of the present invention.

[0031] Figure 6 This is a three-dimensional structural diagram of the cyclone separator of the present invention.

[0032] Figure 7 This is the invention Figure 2 A magnified schematic diagram of the structure at point D.

[0033] In the attached diagram, the following are labeled: 1. Lift pump; 2. Return pump; 3. Separator tank; 4. Solid-gas-liquid separator; 5. Secondary separation chamber; 6. Liquid collection chamber; 7. Flow guide tube; 8. Mounting rod; 9. Inclined guide plate; 10. Porous filter layer; 11. Cyclone separator; 12. Perforated plate; 13. Upper chamber; 14. Lower chamber; 15. Diverter pipe; 16. Through hole; 17. Arc plate; 18. Top plate; 19. Bottom plate; 20. Shrinkage. 21. Swirl inlet; 22. Heat exchanger; 23. Pump end seat; 24. Cylindrical pump body; 25. Eccentric impeller; 26. Vertical cyclone separator; 27. Cylindrical body; 28. Fixed guide impeller; 29. ​​Conical hollow guide shroud; 30. Moving impeller; 31. Driver; 32. Vortex outlet channel; 33. Return pipe; 34. Heat exchanger; 35. Disc; 36. Separating tank; 37. Flow hole; 38. Sedimentation tank. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] Example 1

[0038] Please refer to Figures 1-2 The energy-saving gas pump station separation and purification system includes a cyclone dust removal mechanism, a main pump, and a working fluid filtration mechanism. The outlet of the cyclone dust removal mechanism is connected to the inlet of the main pump, and the working fluid filtration mechanism is used to filter the working fluid in the main pump.

[0039] The cyclone dust removal mechanism includes a horizontal cyclone and a vertical cyclone 26. The horizontal cyclone includes a cylinder 27, a fixed guide impeller 28 installed at the air inlet of the cylinder 27, and a cyclone booster installed in the middle of the cylinder 27. The cyclone booster includes a conical hollow guide shroud 29 fixedly installed inside the cylinder 27, a moving impeller 30 rotatably installed at the end of the conical hollow guide shroud 29, and a driver 31 that provides power for the rotation of the moving impeller 30. The outlet end of the cylinder 27 is provided with a vortex outlet channel 32. The air inlet end of the vertical cyclone 26 is connected to the air outlet end of the vortex outlet channel 32. The top gas outlet end of the vertical cyclone 26 is connected to the interior of the air inlet port of the cylinder 27. Furthermore, the driver 31 is installed inside the conical hollow guide shroud 29. The driver 31 is preferably an electric motor, but a hydraulic motor or a pneumatic motor or other equivalent components can also be used.

[0040] The working fluid filtration mechanism includes a separation tank 3, a booster pump 1, and a reflux pump 2. The separation tank 3 is fixed on a sedimentation tank 38. A solid-gas-liquid separator 4 is installed inside the separation tank 3. The booster pump 1 is used to draw the working fluid in the sedimentation tank 38 to the upper part of the separation tank 3. The reflux pump 2 is used to transport the filtered working fluid to the main pump.

[0041] The separator 3 is equipped with an orifice plate assembly, which divides the separator 3 into a two-stage separation chamber 5, a first-stage separation chamber, and a liquid collection chamber 6 from top to bottom. The reflux pump 2 is used to replenish the working fluid in the liquid collection chamber 6 to the main pump. The outlet of the main pump is connected to the first-stage separation chamber. The solid-gas-liquid separator 4 is installed in the second-stage separation chamber 5.

[0042] The liquid collection chamber 6 is connected to the interior of the sedimentation tank 38. The input end of the lift pump 1 extends to the bottom of the sedimentation tank 38, and the input end of the return pump 2 extends to the upper part of the sedimentation tank 38. Furthermore, the sedimentation tank 38 is equipped with necessary liquid level observation ports and addition ports. The liquid level in the sedimentation tank 38 should be higher than the height of the inlet of the return pump 2. When the liquid level in the sedimentation tank 38 is low, working fluid needs to be added to the sedimentation tank 38 in a timely manner through the addition port. After long-term use (7-10 days), the working fluid in the sedimentation tank 38 needs to be replaced, and necessary agents such as scale inhibitors and drag reducers should be added to the working fluid.

[0043] It also includes a return pipe 33, on which a heat exchanger 34 is installed. One end of the return pipe 33 is connected to the outlet end of the return pump 2, and the other end of the return pipe 33 is connected to the inside of the main pump. Furthermore, the return pipe 33 is equipped with necessary functional valves such as temperature sensors, electromagnetic flow meters, and valves, which will not be described in detail here. The heat exchanger 34 is connected to an external cooling water device to cool the working fluid flowing through the return pipe 33.

[0044] Please refer to Figure 3The main pump for air extraction includes two pump end seats 23, a cylindrical pump body 24, and an eccentric impeller 25. The cylindrical pump body 24 is rotatably mounted between the two pump end seats 23, and the eccentric impeller 25 is rotatably mounted at the eccentric part of the pump cavity formed by the pump end seats 23 and the cylindrical pump body 24. The eccentric impeller 25 is powered by a motor.

[0045] Please refer to Figure 2 , Figures 4-7 The solid-gas-liquid separator 4 includes multiple guide tubes 7, multiple guide filters built into the guide tubes 7, and a liquid distribution plate for supplying liquid to the multiple guide tubes 7. The lift pump 1 is used to lift the liquid working fluid at the bottom of the separator 3 into the liquid distribution plate. The guide filter includes a mounting rod 8, multiple inclined guide plates 9 evenly distributed on the mounting rod 8, and a porous filter material layer 10 installed on the top of the inclined guide plates 9. Furthermore, the inclination directions of adjacent inclined guide plates 9 are opposite.

[0046] Multiple inclined guide plates 9 are inclined downwards at one end near the mounting rod 8, and two adjacent inclined guide plates 9 are located on both sides of the mounting rod 8. The porous filter media layer 10 can be made of activated carbon, volcanic rock, ceramsite, etc. The distance between two adjacent inclined guide plates 9 is at least sufficient to allow the liquid flow from the upper inclined guide plate 9 to the connection between the lower inclined guide plate 9 and the guide cylinder 7. The end of the inclined guide plate 9 near the mounting rod 8 extends beyond the mounting rod 8 to ensure that the liquid flow falls smoothly to the porous filter media layer 10 on the lower inclined guide plate 9. The separation tank 3 is equipped with an exhaust pipe that communicates with the interior of the secondary separation chamber 5. Furthermore, the top of the separation tank 3 is detachably fitted with a cover. The mounting rod 8 is a threaded rod, and the bottom of the guide cylinder 7 is fitted with a bow frame. The threaded rod is screwed into the bow frame to facilitate the complete removal of the guide filter components for cleaning or replacement. It should be noted that the liquid flow rate in the guide cylinder 7 should not be too large to prevent interference with the passage of gas.

[0047] For details, please refer to Figure 6 The liquid distribution plate includes a plate body 35 and multiple liquid distribution grooves 36 installed at the bottom of the plate body 35, which are arranged corresponding to the guide tubes 7. The liquid distribution grooves 36 are provided with multiple circumferentially distributed liquid flow holes 37. Furthermore, the liquid flow holes 37 are located above the inner wall of the guide tube 7. A gap is left between the bottom of the plate body 35 and the top of the guide tube 7 to allow the gas flow to pass through. The flow rate of the working fluid entering the guide tube 7 can be controlled by changing the diameter and number of the liquid flow holes 37. Alternatively, a flow adjustment valve can be installed at the liquid flow holes 37 to adjust the flow rate of the working fluid entering the guide tube 7.

[0048] The energy-saving gas pump station separation and purification system provided in this embodiment features a sedimentation tank 38 that increases the capacity of the working fluid. The working fluid can settle within the sedimentation tank 38, where coal ash particles settle to the bottom under gravity. The upper layer of purified liquid is pumped into the main extraction pump via a return pump 2 to replenish the working fluid, further reducing the amount of coal ash particles entering the main extraction pump and thus reducing wear on the pump chamber. The remaining sedimented working fluid in the sedimentation tank 38 is then lifted... Pump 1 pumps the liquid into the disc 35, and distributes it to each solid-gas-liquid separator 4 through the liquid distribution groove 36 on the disc 35. The working liquid flowing out of the liquid outlet 37 can be dispersed into the solid-gas-liquid separator 4, and ensure that the working liquid drips to the edge of the connection between the inclined guide plate 9 and the guide cylinder 7, which is conducive to the formation of water curtain in the guide cylinder 7. The heat exchanger 34 can cool down the working liquid entering the main pump to reduce the temperature in the pump cavity. The reduction in pump cavity temperature can slow down the wear of the inner wall of the pump cavity.

[0049] Under the negative pressure of the water ring vacuum pump body, gas and coal ash particles enter the cylinder 27. Under the action of the fixed guide impeller 28, the airflow enters the cylinder 27 in a swirling state. The driver 31 drives the impeller 30 to rotate, further improving the swirling effect of the airflow. Under the swirling action, because the mass of coal ash particles is greater than that of gas molecules, the coal ash particles spiral along the inner wall of the cylinder 27. Under the action of the vortex outlet channel 32, the coal ash particles enter the vertical hydrocyclone 26. The swirling air inlet end and the top air outlet end of the vertical hydrocyclone 26 are connected to the air outlet port and air inlet port of the cylinder 27, respectively. The negative pressure at the air outlet end of the cylinder 27 is greater than the negative pressure at the air inlet port. The pressure creates a pressure difference between the swirling inlet and the top outlet of the vertical hydrocyclone 26. Under the action of the pressure difference, the gas flow is forced to flow back into the cylinder 27, preventing some gas from being discharged through the vertical hydrocyclone 26. Under the dual swirling action of the horizontal hydrocyclone and the vertical hydrocyclone 26, coal ash particles are effectively removed, further reducing the amount of coal ash particles that follow the gas into the main pump, and further delaying the wear of the pump chamber. At the same time, under the swirling pressurization effect of the swirling pressurizer on the gas flowing through the cylinder 27, the influence of the cyclone dust removal mechanism on the flow rate and velocity of the gas can be compensated, ensuring the smooth suction of the main pump and improving the gas extraction efficiency of the main pump.

[0050] Example 2

[0051] The energy-saving gas pump station separation and purification system provided in Example 1 has been further optimized. For details, please refer to [link / reference needed]. Figure 2 , Figure 4 as well as Figure 7The solid-gas-liquid separator 4 also includes multiple cyclone separators 11. A spacer plate 12 is provided in the primary separation chamber, which divides the primary separation chamber into an upper chamber 13 and a lower chamber 14. Multiple cyclone separators 11 are evenly distributed in the lower chamber 14. Each cyclone separator 11 includes a diverter pipe 15 and a cyclone guide. Multiple through holes 16 corresponding to the cyclone separators 11 are provided between the lower chamber 14 and the liquid collection chamber 6. The top of the diverter pipe 15 passes through the spacer plate 12 and communicates with the upper chamber 13. The bottom of the diverter pipe 15 extends into the liquid collection chamber 6 through the through hole 16. The cyclone guide is installed at the junction of the diverter pipe 15 and the through hole 16.

[0052] The swirling guide includes two arc-shaped plates 17 and a top plate 18 and a bottom plate 19 fixedly installed on the diverter pipe 15. The two arc-shaped plates 17, the top plate 18, and the bottom plate 19 form a swirling cavity, which communicates with the liquid collecting cavity 6. The top of the liquid collecting cavity 6 is equipped with multiple constricted tubes 20 arranged corresponding to the swirling guide. Two swirling air inlets 21 facing opposite directions are formed between the two arc-shaped plates 17. Furthermore, the inner diameter of the through hole 16 is larger than the outer diameter of the diverter pipe 15 to allow airflow to pass through. The air inlet end of the guide tube 7 is connected to the upper cavity. The upper part of the 13 is connected, and two arc-shaped plates 17 are located between the top plate 18 and the bottom plate 19 and are symmetrically staggered. The inside of the constricted tube 20 is connected to the inside of the vortex cavity, and the small diameter end of the constricted tube 20 faces downward. The outlet of the main pump is connected to the lower cavity 14, and one of the vortex inlets 21 faces the connection between the outlet of the main pump and the lower cavity 14. The constricted tube 20 can promote the accumulation of droplets and coal ash particles in the middle, which is conducive to the formation and continuation of the vortex and prolongs the contact time between droplets and coal ash particles in the gas flow.

[0053] One of the swirl inlets 21 directly "captures" the airflow entering the lower cavity, while the other corresponding swirl inlet 21 can "capture" the reverse airflow in the lower cavity to ensure that the airflow smoothly enters the swirl cavity. The two swirl inlets 21 can create a better swirling effect in the swirl cavity, promoting the aggregation of water vapor and coal ash particles.

[0054] A heat exchange box 22 is installed at the top of the lower cavity 14, and multiple diversion pipes 15 pass through the heat exchange box 22; furthermore, the separator 3 is equipped with necessary functional pipes or valves such as a refrigerant inlet pipe and a refrigerant outlet pipe, as well as a vent pipe and a temperature sensor, which are connected to the inside of the heat exchange box 22. These will not be described in detail here; the diversion pipes 15 are preferably copper pipes with good thermal conductivity.

[0055] The energy-saving gas pump station separation and purification system provided in this embodiment allows the gas flow discharged from the main pump outlet to enter the lower cavity 14. The gas flow is dispersed into each vortex cavity through each vortex inlet 21 and forms a vortex. Under the action of the vortex guide and the constriction tube 20, the water vapor and coal ash particles in the gas flow can be further promoted to aggregate with each other, and the water vapor and coal ash particles can be promoted to form droplets and then separate from the gas, thereby improving the capture effect of water vapor and dust particles in the gas. External refrigerant can be injected into the heat exchange box 22 and take away the heat at the branch pipe 15, thereby reducing the temperature at each branch pipe 15. After the gas flow entering the lower cavity 14 comes into contact with the outer wall of the branch pipe 15, some droplets condense upon cooling. The droplets in the gas flow entering the branch pipe 15 come into contact with the inner wall of the branch pipe 15 and condense, further reducing the water vapor content in the gas flow, thereby reducing the amount of working fluid that escapes with the gas and further saving the amount of working fluid used.

[0056] The energy-saving gas pump station separation and purification system provided by this invention operates as follows: After the main pump starts, a negative pressure is generated in the cyclone dust collector connected to its inlet. Gas and coal ash particles are drawn into the cyclone dust collector, where the coal ash particles are pretreated. Subsequently, the gas and some coal ash particles are pressurized by the main pump and sent to the lower chamber 14 of the separation tank 3. Multiple cyclone separators 11 perform primary separation of water vapor and coal ash particles in the gas. Under the condensation effect of the cyclone and the low-temperature diversion pipe 15, the water vapor and coal ash particles agglomerate and form droplets, which then drip into the sedimentation tank. The gas settles in the sedimentation tank 38. The gas flows through the inside of the diversion pipe 15 to the upper part of the separation tank 3. Then the gas enters the solid-gas-liquid separator 4. The lift pump 1 pressurizes the sediment at the bottom of the sedimentation tank 38 and injects it into each solid-gas-liquid separator 4 through the liquid distribution plate. The solid-gas-liquid separator 4 further captures droplets and coal ash particles in the gas and filters the coal ash particles in the working fluid. The treated gas is directly discharged or utilized, while the working fluid flows back to the sedimentation tank 38. The reflux pump 2 pumps the treated working fluid into the main pump to circulate and replenish the working fluid in the main pump.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. An energy-saving gas pump station separation and purification system, comprising a cyclone dust removal mechanism, a main air suction pump and a working fluid filtering mechanism, the air outlet end of the cyclone dust removal mechanism being in communication with the air inlet end of the main air suction pump; characterized in that, The working fluid filtering mechanism comprises a separation tank (3), a solid-gas-liquid separation piece (4), a lifting pump (1) and a backflow pump (2), the separation tank (3) is internally provided with a perforated plate assembly, the perforated plate assembly divides the separation tank (3) into two-stage separation cavities (5), a first-stage separation cavity and a liquid collecting cavity (6) in communication with each other from top to bottom, the gas outlet end of the main air pump is in communication with the first-stage separation cavity, the solid-gas-liquid separation piece (4) is installed in the two-stage separation cavity (5), and the backflow pump (2) is used for supplementing the working fluid in the liquid collecting cavity (6) into the main air pump. The solid-gas-liquid separation piece (4) comprises a plurality of flow guide cylinders (7), an inclined flow guide plate (9) and a porous filter material layer (10) installed on the top of the inclined flow guide plate (9), and the lifting pump (1) is used for lifting the liquid working fluid at the bottom of the separation tank (3) to the upper portion of the flow guide cylinder (7). The solid-gas-liquid separation piece (4) further comprises a plurality of cyclone separation pieces (11), the first-stage separation cavity is internally provided with a spacing perforated plate (12), the spacing perforated plate (12) divides the first-stage separation cavity into an upper cavity (13) and a lower cavity (14), and the plurality of cyclone separation pieces (11) are uniformly distributed in the lower cavity (14). The cyclone separation piece (11) comprises a flow dividing pipe (15) and a rotational flow guide piece, a plurality of through holes (16) corresponding to the cyclone separation piece (11) are arranged between the lower cavity (14) and the liquid collecting cavity (6), the top of the flow dividing pipe (15) penetrates through the spacing perforated plate (12) and is in communication with the upper cavity (13), the bottom of the flow dividing pipe (15) extends into the liquid collecting cavity (6) from the through hole (16), the rotational flow guide piece is installed at the joint of the flow dividing pipe (15) and the through hole (16), the rotational flow guide piece comprises two arc-shaped plates (17) and a top plate (18) and a bottom plate (19) fixedly installed on the flow dividing pipe (15), a rotational flow cavity is enclosed between the two arc-shaped plates (17), the top plate (18) and the bottom plate (19), the rotational flow cavity is in communication with the liquid collecting cavity (6), a plurality of necked pipes (20) corresponding to the rotational flow guide piece are installed at the top of the liquid collecting cavity (6), two rotational flow inlets (21) facing in opposite directions are formed between the two arc-shaped plates (17); The upper portion of the flow guide cylinder (7) is further provided with a liquid distribution disc, and the lifting pump (1) lifts the liquid working fluid at the bottom of the separation tank (3) into the liquid distribution disc.

2. The energy-saving gas pump station separation purification system according to claim 1, characterized in that, The liquid distribution disc comprises a disc body (35) and a plurality of liquid distribution grooves (36) installed at the bottom of the disc body (35), the liquid distribution grooves (36) are arranged corresponding to the flow guide cylinder (7), and a plurality of circumferentially distributed liquid flow holes (37) are arranged on the liquid distribution grooves (36). The upper portion of the flow guide cylinder (7) is further provided with a liquid distribution disc, and the lifting pump (1) lifts the liquid working fluid at the bottom of the separation tank (3) into the liquid distribution disc.

3. The energy-saving gas pump station separation purification system according to claim 2, characterized in that, The liquid distribution disc comprises a disc body (35) and a plurality of liquid distribution grooves (36) installed at the bottom of the disc body (35), the liquid distribution grooves (36) are arranged corresponding to the flow guide cylinder (7), and a plurality of circumferentially distributed liquid flow holes (37) are arranged on the liquid distribution grooves (36).

4. The energy saving gas pump station separation and purification system of claim 1, wherein, The air extraction main pump comprises two pump end bases (23), a cylinder type pump body (24) and an eccentric impeller (25), the cylinder type pump body (24) is rotatably installed between the two pump end bases (23), and the eccentric impeller (25) is rotatably installed at an eccentric position of a pump cavity enclosed by the pump end bases (23) and the cylinder type pump body (24).

5. The energy saving gas pump station separation and purification system of claim 1, wherein, The cyclone dust removal mechanism comprises a horizontal cyclone and a vertical cyclone (26), the horizontal cyclone comprises a cylinder (27), a fixed guide vane (28) installed at an air inlet of the cylinder (27), and a cyclone pressure booster installed at a middle part of the cylinder (27), the cyclone pressure booster comprises a conical hollow guide cover (29) fixedly installed in the cylinder (27), a movable vane (30) rotatably installed at an end of the conical hollow guide cover (29), and a driver (31) for providing power for rotation of the movable vane (30), an outflow end of the cylinder (27) is provided with a vortex outflow channel (32), an air inlet of the vertical cyclone (26) is in communication with an air outlet of the vortex outflow channel (32), and a top gas outflow end of the vertical cyclone (26) is in communication with an inside of an air inlet port of the cylinder (27).

6. The energy saving gas pump station separation and purification system of claim 1, wherein, A reflux pipe (33) is further arranged, a heat exchanger (34) is installed on the reflux pipe (33), one end of the reflux pipe (33) is in communication with an outflow end of the reflux pump (2), and the other end of the reflux pipe (33) is in communication with the inside of the air extraction main pump.

7. The energy saving gas pump station separation and purification system of claim 1, wherein, The solid-gas-liquid separation member (4) further comprises a sediment tank (38), the separation tank (3) is installed at a top of the sediment tank (38), a liquid collecting cavity (6) is in communication with the inside of the sediment tank (38), an input end of the reflux pump (2) extends into an upper part of the sediment tank (38), and an input end of the reflux pump (2) extends into the bottom of the sediment tank (38).

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