Multi-stage gas-liquid separator

Abstract

The invention relates to the technical field of separation, and particularly discloses a multi-stage gas-liquid separator which comprises a shell, and an inertial collision separation unit, a defoaming separation unit and a condensation separation unit which are arranged in the shell, a spiral collision plate in the inertial collision separation unit periodically changes the width of an inertial collision flow channel through up-down reciprocating motion to form a pulse type variable-diameter spiral channel, the separation effect of high-viscosity reaction byproduct liquid drops is improved, a bidirectional fluid path is formed by the inertial collision flow channel and a floating flow channel, and interstage backmixing is avoided; an outer silk screen and an inner silk screen in the defoaming and separating unit form a gradient interception barrier, and by combining directional back blowing of an inverted-cone-shaped back blowing piece, aerosol and gas are effectively separated, and meanwhile the silk screen blocking rate is reduced; the first annular fins and the second annular fins in the condensation separation unit are of a staggered distribution topological structure, a laminar flow boundary layer is broken, gas forms turbulent disturbance in the condensation separation unit, and the condensation droplet polymerization rate is increased.

Description

Technical Field

[0001] The present invention relates to the field of separation technology, and more specifically, it relates to a multi-stage gas-liquid separator. Background Art

[0002] In the chemical and pharmaceutical industries, reaction tail gases often contain high-concentration volatile organic compounds (VOCs) and viscous by-product droplets (such as colloids generated by polymerization reactions), and need to be separated by gas-liquid separation to meet the requirements of environmental protection emissions and solvent recovery; The fixed diversion structure in traditional separation equipment cannot meet the shearing and crushing requirements of high-viscosity droplets, has insufficient capture rate for viscous droplets with a particle size > 50 μm, and is prone to a sharp increase in pressure loss due to channel blockage; when separating VOCs aerosols, it is easy to cause aerosol adhesion and foam accumulation, and it is necessary to frequently stop the machine to clean the blocked parts; in addition, the droplet escape rate of traditional axial-flow condensers is relatively high, and the independent setting of the drain pipe is prone to leakage or siphon disturbance, resulting in secondary pollution of the purified gas. Summary of the Invention

[0003] In order to overcome the above technical problems, the present invention proposes a multi-stage gas-liquid separator.

[0004] The object of the present invention can be achieved by the following technical solutions: A multi-stage gas-liquid separator, comprising: A housing, an input pipe is provided in the middle thereof, an exhaust pipe is provided at the top of the housing, and a drain pipe is provided at the bottom of the housing; An inertial collision separation unit, which is arranged in the housing and directly above the drain pipe, includes a middle partition cylinder coaxially fixed in the housing. An inertial collision flow channel is formed between the middle partition cylinder and the housing. The upper end of the inertial collision flow channel is communicated with the input pipe. A spiral collision plate is movably arranged in the inertial collision flow channel. An upward floating flow channel is formed in the middle partition cylinder and communicated with the lower end of the inertial collision flow channel; A demisting separation unit, which is arranged in the housing and directly above the inertial collision separation unit, includes a sealing cover coaxially fixed in the housing. An inner wire mesh and an outer wire mesh are respectively arranged on the sealing cover. A conical inverted blowing member adapted to the inner wire mesh and the outer wire mesh is further arranged above the sealing cover; A condensation separation unit, which is arranged in the housing and directly above the demisting separation unit, includes an upper partition plate and a lower partition plate distributed in sequence from top to bottom. A plurality of first annular fins are arranged on the upper partition plate, and a plurality of second annular fins are arranged on the lower partition plate. The first annular fins and the second annular fins are staggered.

[0005] As a further solution of the present invention: a cylinder is vertically fixed on the top of the housing, and the output end of the cylinder is connected to a telescopic rod that vertically penetrates through the condensation separation unit, the demisting separation unit, and the inertial collision separation unit in sequence; the upper end of the spiral collision plate is fixed in the inertial collision flow channel, the lower end of the spiral collision plate is suspended in the inertial collision flow channel, and a plurality of push-pull rods are circumferentially arranged at the lower end of the spiral collision plate, and the push-pull rods are fixedly connected to the telescopic rod through connecting rods.

[0006] As a further solution of the present invention: a flow guide cover is arranged below the middle partition cylinder, a drain hole communicating with the drain pipe is opened at the center of the flow guide cover, and a flow disturbing member is arranged above the drain hole.

[0007] As a further solution of the present invention: the flow disturbing member includes a partition disk fixed on the flow guide cover, a flow guide conical surface and a flexible flow disturbing bladder are sequentially arranged on the partition disk from the inside to the outside, and a first drain port and a second drain port are respectively opened on the partition disk on both the inner and outer sides of the flexible flow disturbing bladder; the top of the flexible flow disturbing bladder is fixedly connected to the push-pull rod.

[0008] As a further solution of the present invention: the demisting separation unit further includes an air chamber fixed on the upper end surface of the sealing partition cover, a piston disk is movably arranged in the air chamber, the piston disk is fixedly sleeved on the telescopic rod, the lower end of the air chamber is unidirectionally communicated with an inverted conical back blowing member, a one-way valve is installed on the piston disk, and a drain groove adapted to the inner wire mesh is opened on the sealing partition cover.

[0009] As a further solution of the present invention: the inverted conical back blowing member includes a back blowing cover fixed on the outside of the air chamber, an air passage communicating with the bottom of the air chamber is opened in the back blowing cover, a plurality of air blowing ports communicating with the air passage are circumferentially opened on the outside of the back blowing cover, a flexible one-way sealing plate is movably arranged at the connection between the back blowing cover and the air chamber, and the flexible one-way sealing plate only allows the gas in the air chamber to flow into the air passage unidirectionally.

[0010] As a further solution of the present invention: the demisting separation unit further includes a vibrating ring adapted to the outer wire mesh, the vibrating ring is located below the outer wire mesh and is fixedly connected to the telescopic rod through a connecting frame.

[0011] As a further solution of the present invention: an S-shaped condensation flow channel extending radially is formed between the first annular fin and the second annular fin, the radially outer end of the S-shaped condensation flow channel is the flow channel inlet, the radially inner end of the S-shaped condensation flow channel is the flow channel outlet, and a plurality of drain through grooves are circumferentially opened at the bottom of each group of second annular fins.

[0012] As a further solution of the present invention: a hollow drain channel communicating with the drain pipe is axially opened in the telescopic rod, and a plurality of communication ports communicating with the flow channel outlet are circumferentially opened at the upper end of the hollow drain channel; When the telescopic rod descends to the in-place position, the lower end of the communication port just abuts against the lower partition plate; when the telescopic rod ascends to the in-place position, the communication port is offset from the lower partition plate.

[0013] As a further solution of the present invention: a condensation top plate is arranged above the upper partition plate, the height of the condensation top plate gradually decreases radially inwards, and a condensation cavity communicating with the exhaust pipe is formed between the condensation top plate and the upper partition plate.

[0014] The beneficial effects of the present invention: In the inertial collision separation unit, the spiral collision plate periodically changes the width of the inertial collision flow path through reciprocating up and down movement, forming a pulsed variable-diameter spiral channel, strengthening the probability of droplet collision and kinetic energy dissipation, and improving the separation effect of high-viscosity reaction by-product droplets. The inertial collision flow path (spiraling downward) and the upward floating flow path (turning back upward) form a two-way fluid path, and the flow field is partitioned through the middle partition cylinder to avoid inter-stage backmixing; in the demisting separation unit, the outer wire mesh and the inner wire mesh form a gradient interception barrier (outer resistance to large particles / inner capture of VOCs aerosol), combined with the directional back blowing of the inverted conical back blowing part, to achieve self-cleaning of demisting, promote the effective separation of aerosol and gas, and reduce the wire mesh blockage rate at the same time; in the condensation separation unit, the first annular fin and the second annular fin adopt an interleaved distribution topology structure, breaking the laminar boundary layer, making the gas form a turbulent disturbance in the condensation separation unit, and improving the condensation droplet polymerization rate. Description of the Drawings

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is a structural schematic diagram of the inertial collision separation unit in the present invention; Figure 4 is Figure 3 an enlarged view of part A in Figure 5 is a structural schematic diagram of the demisting separation unit in the present invention; Figure 6 is Figure 5 an enlarged view of part B in Figure 7 is a structural schematic diagram of the condensation separation unit in the present invention; Figure 8 is Figure 7 an enlarged view of part C in

[0017] In the figure: 100, housing; 110, input pipe; 120, exhaust pipe; 130, drain pipe; 140, cylinder; 150, telescopic rod; 151, hollow drain channel; 152, communication port; 200, inertial collision separation unit; 210, middle partition cylinder; 220, inertial collision flow path; 230, upward floating flow path; 240, deflector; 241, drain hole; 250, spiral collision plate; 251, push-pull rod; 252, connecting rod; 260, flow disturbing member; 261, partition disk; 262, deflector cone surface; 263, flexible flow disturbing bladder piece; 264, first drain port; 265, second drain port; 300, demisting separation unit; 310, sealing partition cover; 311, drain trough opening; 320, inner wire mesh; 330, outer wire mesh; 340, air chamber; 350, piston disk; 351, one-way valve; 360, inverted cone-shaped backwashing member; 361, backwashing cover; 362, air passage; 363, air blowing port; 364, flexible one-way sealing plate; 370, vibration ring; 371, connecting frame; 400, condensation separation unit; 410, upper partition plate; 420, lower partition plate; 430, first annular fin; 440, second annular fin; 441, drain through groove; 450, S-shaped condensation flow path; 451, flow path inlet; 452, flow path outlet; 460, condensation top plate; 470, condensation chamber. Detailed implementation manners

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the content of this specification. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0019] Please refer to Figure 1 and Figure 2 , the present invention discloses a multi-stage gas-liquid separator, including a housing 100, an inertial collision separation unit 200, a demisting separation unit 300, and a condensation separation unit 400. An input pipe 110 is provided in the middle of the housing 100, an exhaust pipe 120 is provided at the top of the housing 100, and a drain pipe 130 is provided at the bottom of the housing 100; Please refer to Figure 3, the inertial collision separation unit 200 is arranged inside the housing 100 and directly above the drain pipe 130, and includes a middle partition cylinder 210 coaxially fixed inside the housing 100. An inertial collision flow channel 220 is formed between the middle partition cylinder 210 and the housing 100. The upper end of the inertial collision flow channel 220 is communicated with the input pipe 110. A spiral collision plate 250 is movably arranged inside the inertial collision flow channel 220. An upward floating flow channel 230 communicated with the lower end of the inertial collision flow channel 220 is formed inside the middle partition cylinder 210; Please refer to Figure 5 , the demisting separation unit 300 is arranged inside the housing 100 and directly above the inertial collision separation unit 200, and includes a sealing cover 310 coaxially fixed inside the housing 100. An inner wire mesh 320 and an outer wire mesh 330 are respectively arranged on the sealing cover 310. An inverted conical back-blowing part 360 adapted to the inner wire mesh 320 and the outer wire mesh 330 is further arranged above the sealing cover 310; Please refer to Figure 7 , the condensation separation unit 400 is arranged inside the housing 100 and directly above the demisting separation unit 300, and includes an upper partition plate 410 and a lower partition plate 420 distributed in sequence from top to bottom. A plurality of first annular fins 430 are arranged on the upper partition plate 410. A plurality of second annular fins 440 are arranged on the lower partition plate 420. The first annular fins 430 and the second annular fins 440 are staggered; Specifically, a mixture of volatile organic compounds and reaction by-product droplets is introduced into the housing 100 through the input pipe 110. The spiral channel formed by the inertial collision flow channel 220 and the spiral collision plate 250 restricts the mixture to move spirally downward. Through the reciprocating movement of the spiral collision plate 250 up and down, the width of the spiral channel is periodically changed, so as to periodically collide the mixture in the spiral channel, promote the separation of droplets and gas. The droplets flow downward along the spiral collision plate 250 and are discharged through the drain pipe 130, while the gas turns back upward and flows into the demisting separation unit 300 through the upward floating flow channel 230; The outer wire mesh 330 in the demisting separation unit 300 intercepts the attached small particle droplets in the gas, and the inner wire mesh 320 captures the entrained VOCs aerosol. The inner wire mesh 320 and the outer wire mesh 330 are back-blown and defoamed through the inverted conical back-blowing part 360. The removed droplets drip downward into the upward floating flow channel 230 and slide downward along the inner wall of the upward floating flow channel 230 into the drain pipe 130; The gas after demisting continues to flow upward into the condensation separation unit 400; The gas sequentially passes through the staggered first annular fins 430 and second annular fins 440. The first annular fins 430 and the second annular fins 440 perform condensation heat exchange on the gas, further promoting the condensation and liquefaction of the moisture in the gas. Subsequently, the droplets flow downward along the lower partition plate 420 and are discharged, while the purified gas passes upward through the upper partition plate 410 and is discharged from the exhaust pipe 120.

[0020] It should be noted that the spiral collision plate 250 in the inertial collision separation unit 200 periodically changes the width of the inertial collision flow channel 220 through reciprocating up and down movement, forming a pulsed variable-diameter spiral channel, strengthening the droplet collision probability and kinetic energy dissipation, and improving the separation effect of high-viscosity reaction by-product droplets. The inertial collision flow channel 220 (spiraling downward) and the upward floating flow channel 230 (turning back upward) form a two-way fluid path, and the flow field is partitioned through the middle partition cylinder 210 to avoid inter-stage backmixing; the outer wire mesh 330 and the inner wire mesh 320 in the demisting separation unit 300 form a gradient interception barrier (outer resistance to large particles / inner capture of VOCs aerosol), combined with the directional back blowing of the inverted conical back blowing member 360, to achieve demisting self-cleaning, promote the effective separation of aerosol and gas, and at the same time reduce the wire mesh blockage rate; the first annular fin 430 and the second annular fin 440 in the condensation separation unit 400 adopt an interleaved distribution topology structure, breaking the laminar boundary layer, making the gas form a turbulent disturbance in the condensation separation unit 400, improving the heat transfer coefficient, and increasing the condensation droplet aggregation rate.

[0021] In one embodiment, please refer to Figure 2 and Figure 3 , a cylinder 140 is vertically fixed at the top of the housing 100, and the output end of the cylinder 140 is connected to a telescopic rod 150 that vertically penetrates through the condensation separation unit 400, the demisting separation unit 300, and the inertial collision separation unit 200 in sequence; the upper end of the spiral collision plate 250 is fixed in the inertial collision flow channel 220, the lower end of the spiral collision plate 250 is suspended in the inertial collision flow channel 220, and a plurality of push-pull rods 251 are circumferentially arranged at the lower end of the spiral collision plate 250. The push-pull rods 251 are fixedly connected to the telescopic rod 150 through connecting rods 252; Specifically, by driving the telescopic rod 150 to reciprocate up and down through the cylinder 140, the push-pull rods 251 can be synchronously driven to move up and down, thereby reciprocally pushing and pulling the lower end of the spiral collision plate 250 in the vertical direction, and then periodically changing the width of the inertial collision flow channel 220. The droplets in the mixture are collided by the oscillating spiral collision plate 250 up and down, effectively improving the separation effect of high-viscosity reaction by-product droplets.

[0022] It should be noted that the cylinder 140 drives the telescopic rod 150 to drive the push-pull rod 251 to reciprocate, causing the lower end of the spiral collision plate 250 to generate periodic oscillations in the vertical direction, periodically changing the channel width of the inertial collision flow path 220, forming a pulsed variable runoff field, generating a shear fragmentation effect on high-viscosity droplets, and improving the separation efficiency; the spiral collision plate 250 vibrates up and down, forcing the droplets to undergo inertial collision and secondary rebound trapping with the plate surface, effectively improving the removal rate of large-diameter and high-viscosity droplets; in addition, when the spiral collision plate 250 oscillates, it can automatically scrape the inner wall of the inertial collision flow path 220 to remove the attached sediment and avoid a sharp increase in pressure loss caused by a narrow flow path.

[0023] Further, please refer to Figure 3 , a flow deflector 240 is provided below the middle partition cylinder 210. A drain hole 241 communicating with the drain pipe 130 is provided at the center of the flow deflector 240, and a flow disturbing member 260 is provided above the drain hole 241; Please refer to Figure 4 , the flow disturbing member 260 includes a partition disk 261 fixed to the flow deflector 240. A flow guiding conical surface 262 and a flexible flow disturbing bladder 263 are sequentially arranged on the partition disk 261 from the inside to the outside. First drain ports 264 and second drain ports 265 are respectively provided on the partition disk 261 on both the inner and outer sides of the flexible flow disturbing bladder 263; the top of the flexible flow disturbing bladder 263 is fixedly connected to the push-pull rod 251; Specifically, when the telescopic rod 150 drives the spiral collision plate 250 to oscillate up and down, it can drive the flexible flow disturbing bladder 263 to be periodically stretched upward and compressed and folded downward through the push-pull rod 251. Thus, by using the periodic elastic deformation of the flexible flow disturbing bladder 263, the mixed air flow above the partition disk 261 is disturbed, promoting further separation of the droplets and the gas, and at the same time periodically pushing the gas upward into the floating flow path 230; during the flow disturbing process, the separated droplets can slide down along the inclined surfaces of the partition disk 261 and the flexible flow disturbing bladder 263 into the first drain ports 264 and the second drain ports 265, and finally be discharged into the drain pipe 130 through the drain hole 241 on the flow deflector 240.

[0024] It should be noted that the push-pull rod 251 drives the flexible flow disturbing bladder 263 to be periodically stretched or compressed, forming a high-frequency elastic disturbance flow field, destroying the laminar state of the air flow, promoting secondary separation of the droplets and the gas, and improving the trapping efficiency of large-diameter and high-viscosity droplets; the flow guiding conical surface 262 radially disperses the air flow, and the acting force generated by the deformation of the flexible flow disturbing bladder 263 throws the droplets towards the inclined surface of the partition disk 261, and the droplets are discharged in a graded manner through the first drain ports 264 (large central droplets) and the second drain ports 265 (small peripheral droplets) to avoid droplet aggregation and blockage of the drain hole 241.

[0025] In yet another embodiment, please refer to Figure 5 andFigure 6 The demisting and separating unit 300 further includes an air chamber 340 fixed to the upper end surface of the sealing cover 310. A piston disc 350 is movably arranged in the air chamber 340. The piston disc 350 is fixedly sleeved on the telescopic rod 150. The lower end of the air chamber 340 is unidirectionally communicated with an inverted conical back blowing member 360. A one-way valve 351 is installed on the piston disc 350. A liquid discharge groove opening 311 adapted to the inner wire mesh 320 is formed on the sealing cover 310. Specifically, when the telescopic rod 150 moves upward, it drives the piston disc 350 to slide upward synchronously along the air chamber 340. At this time, the one-way valve 351 is opened, and the channel between the lower end of the air chamber 340 and the inverted conical back blowing member 360 is blocked, so that the air above the piston disc 350 is transferred to the lower part of the piston disc 350. Subsequently, the telescopic rod 150 moves downward, driving the piston disc 350 to slide downward synchronously. At this time, the one-way valve 351 is closed, and the channel between the lower end of the air chamber 340 and the inverted conical back blowing member 360 is conducted. The air in the air chamber 340 can be squeezed into the inverted conical back blowing member 360 by the piston disc 350, so as to use the airflow ejected from the inverted conical back blowing member 360 to blow back and remove foam on the inner wire mesh 320 and the outer wire mesh 330.

[0026] Further, please refer to Figure 6 The inverted conical back blowing member 360 includes a back blowing cover 361 fixed to the outside of the air chamber 340. An air passage 362 communicating with the bottom of the air chamber 340 is formed in the back blowing cover 361. A plurality of air blowing ports 363 communicating with the air passage 362 are circumferentially formed on the outer side of the back blowing cover 361. A flexible one-way sealing plate 364 is movably arranged at the connection between the back blowing cover 361 and the air chamber 340. The flexible one-way sealing plate 364 only allows the gas in the air chamber 340 to flow unidirectionally into the air passage 362. Specifically, when the piston disc 350 moves upward, the flexible one-way sealing plate 364 blocks the channel between the air chamber 340 and the air passage 362. When the piston disc 350 moves downward, the air pressure in the air chamber 340 increases, and the flexible one-way sealing plate 364 flips upward under the action of the pressure difference, so that the channel between the air chamber 340 and the air passage 362 is opened, and the gas in the air chamber 340 is pressed into the air passage 362. Subsequently, the gas is ejected from each air blowing port 363 towards the inner wire mesh 320 and the outer wire mesh 330, so as to realize the back blowing of the liquid foam adhering to the inner wire mesh 320 and the outer wire mesh 330, and promote the foam to separate from the inner wire mesh 320 and the outer wire mesh 330. Among them, the foam blown off from the inner wire mesh 320 can be discharged downward through the liquid discharge groove opening 311 on the sealing cover 310.

[0027] It should be noted that the telescopic rod 150 drives the piston disc 350 to move up and down, and through the inverted conical backwashing member 360 for directional blowing, the backwashing function can be realized without an external air source; when the piston disc 350 moves downward, a high-pressure pulsed air flow is formed and ejected from the air blowing port 363, generating a shear peeling effect on the foam adhering to the inner wire mesh 320 and the outer wire mesh 330, improving the backwashing efficiency; the flexible one-way sealing plate 364 only allows the air chamber 340 to conduct unidirectionally towards the air duct 362, automatically closing when the piston disc 350 returns, avoiding reverse air leakage, and at the same time improving the utilization rate of the backwashing air flow; the blown foam flows down along the inclined surface of the sealing cover 310 through the liquid drainage groove port 311, converges with the droplets in the inertial collision section, and is discharged through the liquid drainage pipe 130. The liquid-gas separation path is completely isolated, preventing the backwashed droplets from entering the purified air flow again.

[0028] Furthermore, please refer to Figure 5 , the demisting and separating unit 300 further includes a vibrating ring 370 adapted to the outer wire mesh 330. The vibrating ring 370 is located below the outer wire mesh 330 and is fixedly connected to the telescopic rod 150 through a connecting frame 371; Specifically, when the telescopic rod 150 expands and contracts, it can synchronously drive the vibrating ring 370 to vibrate and knock on the outer wire mesh 330, thereby further promoting the detachment of the large particle foam droplets adhering to the outer wire mesh 330.

[0029] It should be noted that the telescopic rod 150 rigidly drives the vibrating ring 370 through the connecting frame 371, causing the outer wire mesh 330 to generate high-frequency and small-amplitude vibrations, improving the peeling efficiency of the large particle foam droplets adhering to the surface of the outer wire mesh 330; the vibrating knock (vibrating ring 370) and the air flow backwashing (inverted conical backwashing member 360) form a mechanical-pneumatic composite cleaning mechanism, realizing three-dimensional cleaning of the wire mesh surface (axial vibration + radial air flow scouring), effectively improving the cleaning coverage rate.

[0030] In a further embodiment, please refer to Figure 7 , an S-shaped condensation flow channel 450 extending radially is formed between the first annular fin 430 and the second annular fin 440. The radially outer end of the S-shaped condensation flow channel 450 is a flow channel inlet 451, and the radially inner end of the S-shaped condensation flow channel 450 is a flow channel outlet 452. A plurality of liquid drainage through grooves 441 are circumferentially formed at the bottom of each group of second annular fins 440; Specifically, the gas discharged from the defoaming and separation unit 300 enters the S-shaped condensation flow channel 450 from the flow channel inlet 451. During the radial flow of the gas in the S-shaped condensation flow channel 450, the gas is subjected to heat exchange and condensation treatment through the staggered first annular fins 430 and the second annular fins 440, thereby causing the moisture in the gas to condense and liquefy. Subsequently, the droplets produced by the liquefaction are discharged from the flow channel outlet 452 through the drainage groove 441 at the bottom of each second annular fin 440. The purified gas after condensation and separation is discharged from the flow channel outlet 452, passes vertically upward through the upper partition plate 410, and is finally discharged from the exhaust pipe 120.

[0031] It should be noted that the S-shaped condensation flow channel 450 is designed with a radially extending serpentine path to delay the gas flow path, forcing the gas to fully contact the first annular fin 430 and the second annular fin 440, thereby improving the heat exchange efficiency; the first annular fin 430 and the second annular fin 440 are staggered to form a periodic flow channel mutation, destroying the laminar boundary layer, inducing the gas to produce local vortices, prompting the condensed droplets to quickly aggregate, and increasing the droplet condensation and sedimentation rate; the drainage grooves 441 are evenly distributed along the circumference of the bottom of the second annular fin 440, and the condensed droplets preferentially converge to the grooves under the action of surface tension, thereby reducing the droplet escape rate and avoiding secondary contamination of the purified gas.

[0032] For further information, see Figure 8 In order to discharge the condensed and focused droplets smoothly, a hollow drainage channel 151 connected to the drainage pipe 130 is axially opened in the telescopic rod 150, and a plurality of communication ports 152 connected to the flow channel outlet 452 are circumferentially opened at the upper end of the hollow drainage channel 151; When the telescopic rod 150 is lowered into place, the lower end of the communication port 152 is just connected with the lower partition plate 420; when the telescopic rod 150 is raised into place, the communication port 152 is staggered with the lower partition plate 420; Specifically, the liquid generated by condensation in the S-shaped condensation channel 450 converges to the channel outlet 452 through the drainage grooves 441. When the telescopic rod 150 is lowered into place, the liquid droplets can enter the hollow drainage channel 151 through the connecting port 152, and then be discharged into the drainage pipe 130 through the hollow drainage channel 151.

[0033] When the telescopic rod 150 is lowered to the right position, the communication port 152 is connected with the lower partition plate 420, and the condensate is quickly discharged through the flow channel outlet 452 → the communication port 152 → the hollow drainage channel 151 → the drainage pipe 130; When the telescopic rod 150 rises to its proper position, the communication port 152 is staggered with the lower partition plate 420, completely blocking the droplet leakage path, thus achieving zero-leakage periodic drainage; The hollow drainage channel 151 is integrated inside the telescopic rod 150, and no additional drainage pipeline is required, thus saving space; The communication ports 152 are circumferentially arranged evenly to ensure that the condensate at the outlet 452 of the flow channel is fully covered and diverted, improving the liquid drainage efficiency; the communication ports 152 are always located above the lower partition plate 420, and the liquid level difference is used to form gravity-driven self-flow drainage to avoid air flow disturbance caused by the siphon effect; when the telescopic rod 150 reciprocates, a periodic shear flow is generated on the inner wall of the hollow liquid drainage channel 151, thereby effectively removing the scale on the inner wall of the channel.

[0034] It should be noted that the position of the communication port 152 is always located above the lower partition plate 420. In this way, during the up and down movement of the telescopic rod 150, the converged liquid droplets can be periodically discharged, and at the same time, the liquid droplets above the lower partition plate 420 will not leak.

[0035] Furthermore, please refer to Figure 7 , a condensate top plate 460 is provided above the upper partition plate 410. The height of the condensate top plate 460 gradually decreases radially inward, and a condensate cavity 470 communicating with the exhaust pipe 120 is formed between the condensate top plate 460 and the upper partition plate 410; Specifically, the purified gas passes through the upper partition plate 410 and enters the condensate cavity 470, and the gas is further heat-exchanged and condensed through the condensate top plate 460, so that the remaining moisture in the gas is further condensed and liquefied. Subsequently, the liquefied liquid droplets flow back to the center along the gradually inclined lower end surface of the condensate top plate 460, and then the liquid drops vertically to the lower flow channel outlet 452, and thus converge with the liquid droplets condensed and liquefied by the S-shaped condensate flow channel 450 and are discharged into the hollow liquid drainage channel 151.

[0036] It should be noted that the condensate top plate 460 and the upper partition plate 410 form a condensate cavity 470 to perform terminal deep condensation on the gas preliminarily purified by the S-shaped condensate flow channel 450, improving the removal rate of residual moisture and the capture efficiency of ultrafine liquid droplets; the height of the condensate top plate 460 gradually decreases radially inward (the slope is 3°-5°), and the synergy of surface tension and gravity is used to make the liquid droplets automatically converge to the center along the inclined surface; the liquid droplets in the condensate cavity 470 → drop to the center to the flow channel outlet 452 → the hollow liquid drainage channel 151 → the liquid drainage pipe 130, forming a fully enclosed liquid drainage loop, completely isolating the contact path between the purified gas and the liquid droplets.

[0037] The specific embodiments of the present invention have been described above, but the present invention is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present invention, those skilled in the art can also make many forms, all of which fall within the protection scope of the present invention.

Claims

1. A multi-stage gas-liquid separator, characterized in that, Comprising: A housing (100) with an input pipe (110) provided in the middle thereof, an exhaust pipe (120) provided at the top of the housing (100), and a drain pipe (130) provided at the bottom of the housing (100); An inertial collision separation unit (200) which is arranged inside the housing (100) and directly above the drain pipe (130), and includes a middle partition cylinder (210) coaxially fixed inside the housing (100). An inertial collision flow channel (220) is formed between the middle partition cylinder (210) and the housing (100). The upper end of the inertial collision flow channel (220) is communicated with the input pipe (110). A spiral collision plate (250) is movably arranged in the inertial collision flow channel (220). An upward floating flow channel (230) communicated with the lower end of the inertial collision flow channel (220) is formed inside the middle partition cylinder (210); A demisting separation unit (300) which is arranged inside the housing (100) and directly above the inertial collision separation unit (200), and includes a sealing cover (310) coaxially fixed inside the housing (100). An inner wire mesh (320) and an outer wire mesh (330) are respectively arranged on the sealing cover (310). An inverted conical back blowing member (360) adapted to the inner wire mesh (320) and the outer wire mesh (330) is further arranged above the sealing cover (310); A condensation separation unit (400) which is arranged inside the housing (100) and directly above the demisting separation unit (300), and includes an upper partition plate (410) and a lower partition plate (420) distributed in sequence from top to bottom. A plurality of first annular fins (430) are arranged on the upper partition plate (410). A plurality of second annular fins (440) are arranged on the lower partition plate (420). The first annular fins (430) and the second annular fins (440) are staggered; 2. The multi-stage gas-liquid separator according to claim 1, wherein, A cylinder (140) is vertically fixed at the top of the housing (100). The output end of the cylinder (140) is connected with a telescopic rod (150) vertically passing through the condensation separation unit (400), the demisting separation unit (300) and the inertial collision separation unit (200) in sequence; The upper end of the spiral collision plate (250) is fixed in the inertial collision flow channel (220). The lower end of the spiral collision plate (250) is suspended in the inertial collision flow channel (220). A plurality of push-pull rods (251) are circumferentially arranged at the lower end of the spiral collision plate (250). The push-pull rods (251) are fixedly connected with the telescopic rod (150) through a connecting rod (252); 3. The multistage gas-liquid separator according to claim 2, characterized in that, A flow guide cover (240) is arranged below the middle partition cylinder (210). A drain hole (241) communicated with the drain pipe (130) is opened at the center of the flow guide cover (240). A flow disturbing member (260) is arranged above the drain hole (241).

4. The multi-stage gas-liquid separator according to claim 3, wherein, The spoiler (260) comprises a separation plate (261) fixed on the deflector cover (240); the separation plate (261) is provided with a deflection cone (262) and a flexible spoiler flap (263) in sequence from the inside to the outside; the separation plate (261) on both sides of the inside and outside of the flexible spoiler flap (263) is provided with a first liquid discharge port (264) and a second liquid discharge port (265), respectively; and the top of the flexible spoiler flap (263) is fixedly connected to the push-pull rod (251).

5. The multi-stage gas-liquid separator according to claim 2, wherein, The defoaming separation unit (300) further comprises an air bin (340) fixed to the upper end surface of the sealing cover (310), a piston disc (350) being movably arranged in the air bin (340), the piston disc (350) being fixedly sleeved on the telescopic rod (150), the lower end of the air bin (340) being in one-way communication with an inverted cone-shaped back-blowing member (360), a one-way valve (351) being installed on the piston disc (350), and a liquid discharge slot (311) adapted to the inner screen (320) being provided on the sealing cover (310).

6. The multi-stage gas-liquid separator according to claim 5, characterized in that, The inverted cone back-blowing component (360) includes a back-blowing hood (361) fixed to the outside of the gas bin (340), an air passage (362) connected to the bottom of the gas bin (340) is provided in the back-blowing hood (361), a plurality of blowing ports (363) connected to the air passage (362) are circumferentially provided on the outside of the back-blowing hood (361), and a flexible one-way sealing plate (364) is movably provided at the connection between the back-blowing hood (361) and the gas bin (340), and the flexible one-way sealing plate (364) only allows the gas in the gas bin (340) to flow into the air passage (362) in one direction.

7. The multi-stage gas-liquid separator according to claim 2, wherein, The defoaming and separation unit (300) further comprises a vibrating ring (370) adapted to the outer wire mesh (330); the vibrating ring (370) is located below the outer wire mesh (330) and is fixedly connected to the telescopic rod (150) via a connecting frame (371).

8. A multi-stage gas-liquid separator according to claim 2, wherein, An S-shaped condensation flow channel (450) extending radially is formed between the first annular fin (430) and the second annular fin (440); the radially outward end of the S-shaped condensation flow channel (450) is a flow channel inlet (451); the radially inward end of the S-shaped condensation flow channel (450) is a flow channel outlet (452); and a plurality of drainage grooves (441) are circumferentially provided at the bottom of each group of second annular fins (440).

9. The multistage gas-liquid separator according to claim 8, characterized in that, A hollow drainage channel (151) connected to the drainage pipe (130) is axially formed in the telescopic rod (150); a plurality of communication ports (152) connected to the flow channel outlet (452) are circumferentially formed at the upper end of the hollow drainage channel (151); When the telescopic rod (150) is lowered into position, the lower end of the communication opening (152) is just connected to the lower partition plate (420); when the telescopic rod (150) is raised into position, the communication opening (152) is offset from the lower partition plate (420).

10. A multi-stage gas-liquid separator according to claim 8, wherein, A condensation top plate (460) is disposed above the upper partition plate (410). The height of the condensation top plate (460) gradually decreases radially inward. A condensation cavity (470) communicating with the exhaust pipe (120) is formed between the condensation top plate (460) and the upper partition plate (410).

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