Gas-liquid two-phase separation treatment device

Abstract

The present application relates to gas treatment technical field, specifically is a kind of gas gas-liquid two-phase separation processing device, the present application includes separation cylinder, coaxially installed center tube, gas inlet pipe and outlet pipe.Self from bottom to top in separation cylinder is equipped with cyclone separation mechanism, coalescence separation mechanism in turn.Cyclone separation mechanism includes two groups of helical guide vane of different pitch, and transition annular cavity is formed between two blades;Helical guide vane root thick end thin, bottom surface root is provided with liquid collection drainage groove, and helical water collection groove is correspondingly provided in separation cylinder inner wall.Coalescence separation mechanism includes coalescence fiber medium ring of density gradually increasing from center to outside, and its peripheral annular protrusion extends into trapezoidal annular water suction groove of separation cylinder inner wall and is communicated with liquid collection annular groove one.Liquid separated at each stage is converged into liquid collection annular groove two through liquid convergence flow channel, and is concentrated and discharged through U-shaped tube and liquid discharge assembly.This device can efficiently remove liquid water and light hydrocarbon entrained in gas, reduce gas combustion pollutant emission, reduce pipeline corrosion and leakage risk.

Description

Technical Field

[0001] This invention relates to the field of gas treatment technology, specifically a gas-liquid two-phase separation and treatment device, which is an environmental protection device that helps prevent and control air pollution. Background Technology

[0002] Gases (such as natural gas, coalbed methane, associated gas, and biogas) often contain entrained liquid water, light hydrocarbons, or condensate oil during extraction, gathering, transportation, and industrial applications. If these liquids are not effectively removed, they will accelerate corrosion and erosion of pipelines and downstream equipment (compressors, pressure regulating valves, burners), reduce equipment lifespan, and increase the risk of leaks; they will also cause fluctuations in the calorific value of the gas, unstable combustion, reduced energy efficiency, and increased pollutant emissions. In particular, incomplete combustion of gas containing entrained liquids will produce more nitrogen oxides, particulate matter, and unburned hydrocarbons, causing air pollution; at the same time, the risk of leaks may lead to gas escape, contributing to the greenhouse effect. Therefore, efficiently removing entrained liquids from gas at the source is not only a process requirement but also an important measure for environmental protection and resource conservation. Efficient and reliable gas-liquid two-phase separation is a key step in gas treatment processes and an important supporting technology for clean energy utilization in advanced environmental protection industries.

[0003] Cyclone separators are commonly used devices for gas-liquid separation of fuel gas. Existing cyclone separators generate centrifugal force through a tangential inlet to eject liquid droplets. However, their use has the following shortcomings: There is a laminar sublayer with a thickness of about 0.1 to 1 mm near the cylinder wall. The gas velocity in this region is extremely low. The centrifugal force on the 1 to 10 μm microdroplets is insufficient to throw them toward the wall. Instead, they slide and escape along this low-velocity layer, resulting in poor separation of fine droplets. Summary of the Invention

[0004] The purpose of this invention is to provide a gas-liquid two-phase separation and treatment device for gas to solve the problems mentioned in the background art. This device can efficiently remove liquid water and light hydrocarbons entrained in gas, reduce the emission of pollutants from gas combustion, benefit the environment, and reduce the risk of pipeline corrosion and leakage.

[0005] The objective of this invention can be achieved through the following technical solutions: A gas-liquid two-phase separation and processing device for fuel gas includes: The separator is closed at the top and open at the bottom, and an air inlet pipe is fixedly installed through it near the bottom of the separator. A central tube is coaxially installed in the separator cylinder. There is a gap between the top end of the central tube and the inner top end of the separator cylinder. The bottom end of the central tube extends to the bottom of the separator cylinder and is fixedly connected to an air outlet pipe. A partition plate located between the air inlet pipe and the bottom surface of the separator cylinder is fixedly installed between the outer periphery of the central tube and the inner wall of the separator cylinder. The cyclone separation mechanism includes two sets of cyclone separation components disposed in a separation cylinder. Each cyclone separation component includes a spiral guide vane. The spiral guide vanes in the two sets of cyclone separation components have different pitches, with the smaller pitch on the top. A transition annular cavity is formed between the two spiral guide vanes between the inner wall of the separation cylinder and the outer periphery of the central tube. A coalescence separation mechanism is disposed in the separation cylinder and positioned above the cyclone separation mechanism; The liquid guiding structure is set in the side wall of the separation cylinder to receive the liquid separated by the cyclone separation mechanism and the coalescence separation mechanism; A drainage mechanism is connected to the outlet end of the liquid guiding structure.

[0006] Furthermore, the liquid guiding structure includes an annular water collecting structure used in conjunction with the coalescence separation mechanism, two spiral water collecting structures used in conjunction with two sets of cyclone separation components, and a second annular liquid collecting groove located at the bottom of the side wall of the separation cylinder. Multiple liquid collecting channels are provided between the second annular liquid collecting groove and the annular water collecting structure and the spiral water collecting structure, and the liquid collecting channels are used to guide the collected liquid into the second annular liquid collecting groove.

[0007] Furthermore, the spiral water collection structure includes spiral water collection grooves formed on the inner wall of the separation cylinder, the pitch of the two spiral water collection grooves is equal to the pitch of the two spiral guide vanes, and the spiral water collection grooves are in communication with the interior of the separation cylinder.

[0008] Furthermore, the cyclone separation assembly includes a spiral guide vane fixedly installed between the inner wall of the separation cylinder and the periphery of the central tube. The spiral guide vane gradually thins from the inner wall of the separation cylinder towards the periphery of the central tube, that is, the root of the spiral guide vane is thicker and the cross-section is wedge-shaped. The root of the bottom surface of the spiral guide vane is located above the corresponding spiral water collection tank; A liquid collection and drainage groove is provided at the root of the bottom surface of the spiral guide blade, and the liquid collection and drainage groove is connected to the spiral water collection groove.

[0009] Furthermore, the top surface of the liquid collection and diversion channel is inclined, and the lower end points towards the spiral water collection channel.

[0010] Furthermore, the annular water collection structure includes a liquid collection annular groove 1 formed in the inner wall of the separation cylinder. The liquid collection annular groove 1 has a plurality of annular water absorption grooves arranged in an array along the axial direction of the separation cylinder on its side near the interior of the separation cylinder. The liquid collection annular groove 1 communicates with the interior of the separation cylinder through the annular water absorption grooves. The cross-section of the annular water absorption groove is trapezoidal. The larger end of the annular water absorption groove is connected to the interior of the separation cylinder, and the smaller end of the annular water absorption groove is connected to the liquid collection annular groove.

[0011] Furthermore, the coalescing separation mechanism includes a coalescing fiber medium ring fixedly installed between the inner wall of the separation cylinder and the periphery of the central tube. The periphery of the coalescing fiber medium ring is arranged in an array along its axial direction with a plurality of annular protrusions that are equal in number and match in shape to the plurality of annular water absorption grooves. The plurality of annular protrusions are respectively arranged in the plurality of annular water absorption grooves, and the tips of the annular protrusions extend into the liquid collection annular groove. The density of the coalesced fiber media ring gradually increases from the central tube to the inner wall of the separation cylinder.

[0012] Furthermore, the drainage mechanism includes a U-shaped tube that is connected in a continuous manner to the liquid collection annular groove, and a drainage component is connected to the end of the U-shaped tube away from the separation cylinder.

[0013] Furthermore, the drainage assembly includes a cylinder, with an inlet fixedly connected to the U-shaped tube at the top and an outlet fixedly connected to the bottom of the cylinder. An installation strip is fixedly installed on the upper part of the inner wall of the cylinder. A telescopic rod coaxial with the water outlet pipe is fixedly installed on the bottom surface of the installation strip. A float ball is fixedly connected to the bottom end of the telescopic rod. A conical plug coaxial with the water outlet pipe is fixedly connected to the float ball. The conical plug is used to control the opening and closing of the water outlet pipe.

[0014] Furthermore, a flow guide is fixedly installed on the periphery of the central tube near the top, and the flow guide is an inverted conical structure; A flow collecting shroud is fixedly installed on the inner top surface of the separation cylinder, and a flow guide cone coaxial with the central tube is fixedly installed on the inner top surface of the flow collecting shroud. The inner top surface of the shroud is rounded and chamfered, and the bottom of the inner wall of the shroud is also chamfered.

[0015] Furthermore, the partition is funnel-shaped, and a through pipe is provided between the bottom of the partition and the upper part of the liquid collecting ring, and a gate valve is provided in the pipe.

[0016] The beneficial effects of this invention are: 1. This invention designs the spiral guide vanes as wedge-shaped sections that gradually thin from the inner wall of the separation cylinder towards the central tube. This creates localized flow channel contraction and airflow turbulence near the cylinder wall, forcibly "squeezing" 1-10 μm fine droplets from the laminar sublayer into the mainstream region where they are separated by centrifugal force. This significantly improves the removal rate of fine droplets from the combustion gas, reducing the generation of pollutants caused by liquids during subsequent combustion.

[0017] 2. This invention features a liquid collection and diversion groove at the root of the bottom surface of the spiral guide vane, which directly connects to the spiral water collection groove on the inner wall of the separation cylinder. This provides a "rapid evacuation channel" for the captured droplets, independent of the high-speed airflow, preventing the droplets from being sheared and atomized again by the airflow as they slide along the vane surface. This structure reduces the probability of gas re-entraining liquid, thereby reducing the escape of gaseous pollutants during the liquid discharge process.

[0018] 3. This invention employs two helical guide vanes with fixed pitches and different pitches (the smaller pitch vane is on top), with a transition annular cavity in between. Under high load, the lower, larger pitch vane generates strong centrifugal force to complete coarse separation, while the transition annular cavity buffers and slows the airflow before it enters the upper, smaller pitch vane, preventing secondary atomization at high air velocities. Under low load, the centrifugal force of the lower vane weakens, but the upper, smaller pitch vane provides a longer rotation path and more turning cycles. This wide load adaptability ensures that the gas treatment device maintains efficient separation under different operating conditions, reducing the risk of emissions exceeding standards due to load fluctuations.

[0019] 4. The coalescing fiber media ring adopts a radial gradient density structure with a sparse inner layer and a dense outer layer, guiding gas towards the low-resistance central region and pushing liquid towards the outer edge with high capture capacity. Combined with the capillary active water absorption at the tip of the trapezoidal annular water absorption tank and the self-liquid sealing effect formed after the tank opening is filled with liquid, this design achieves water drainage only, without gas leakage. This design avoids gas short-circuit leakage, not only improving separation efficiency but also preventing environmental pollution caused by the direct emission of untreated fuel gas.

[0020] 5. The U-shaped liquid seal and the float-driven conical plug in the drainage assembly form a double seal. The U-shaped tube provides a continuous gas seal; the float maintains liquid level control even during drainage, preventing instantaneous gas overflow. The combination of these two features ensures the drainage system is leak-free across a wide pressure fluctuation range.

[0021] 6. This invention significantly reduces the water and light hydrocarbons entrained in the gas through a multi-stage high-efficiency gas-liquid separation structure, thereby reducing combustion pollutant emissions, preventing pipeline corrosion and leakage, and improving gas utilization efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the internal structure of the separation cylinder in this invention; Figure 3 yes Figure 2Enlarged view of section C; Figure 4 yes Figure 2 Enlarged view of section B; Figure 5 yes Figure 2 A three-dimensional diagram from another angle; Figure 6 yes Figure 5 Enlarged view of section F in the middle; Figure 7 This is a schematic diagram of the positional relationship between the spiral guide vanes and the spiral water collection tank in this invention; Figure 8 yes Figure 2 Enlarged view of section A; Figure 9 yes Figure 2 Enlarged view of section D; Figure 10 This is a schematic diagram of the structure of the coalesced fiber media ring in this invention; Figure 11 yes Figure 2 Enlarged view of section E in the middle; Figure 12 yes Figure 5 Enlarged view of section G in the middle; Figure 13 This is a schematic diagram of the drainage mechanism in this invention; Figure 14 This is a schematic diagram of the connection relationship between the partition and the liquid collection annular groove 2 in this invention; The attached figures are labeled as follows: 1-Separation cylinder, 2-Inlet pipe, 3-Central pipe, 4-Outlet pipe, 5-U-shaped pipe, 6-Drainage assembly, 7-Baffle plate, 8-Collection channel, 9-Spiral guide vane, 10-Spiral water collection trough, 11-Coalescing fiber medium ring, 12-Collection annular groove two, 13-Annular protrusion, 14-Collection annular groove one, 15-Annular suction groove, 16-Guide hood, 17-Collection hood, 18-Guide cone, 19-Collection diversion groove, 20-Cylinder body, 21-Outlet pipe, 22-Inlet, 23-Installation strip, 24-Telescopic rod, 25-Float ball, 26-Conical plug, 27-Transition annular cavity, 28-Pipeline, 29-Gate valve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1 , Figure 2 and Figure 5 In this embodiment of the invention, a gas-liquid two-phase separation and processing device for fuel gas includes: The separator 1 is closed at the top and open at the bottom. An inlet pipe 2 is fixedly installed through the outer periphery of the separator 1 near the bottom. The central tube 3 is coaxially installed in the separator cylinder 1. There is a gap between the top end of the central tube 3 and the inner top end of the separator cylinder 1. The bottom end of the central tube 3 extends to the bottom of the separator cylinder 1 and is fixedly connected to the air outlet pipe 4. A partition 7 located between the air inlet pipe 2 and the bottom surface of the separator cylinder 1 is fixedly installed between the outer periphery of the central tube 3 and the inner wall of the separator cylinder 1. The cyclone separation mechanism includes two sets of cyclone separation components disposed in the separation cylinder 1. Each cyclone separation component includes a spiral guide vane 9. The spiral guide vanes 9 in the two sets of cyclone separation components have different pitches, with the smaller pitch being on top. A transition annular cavity 27 is formed between the two spiral guide vanes 9 between the inner wall of the separation cylinder 1 and the outer periphery of the central tube 3. The coalescence separation mechanism is installed in the separation cylinder 1 and positioned above the cyclone separation mechanism; A liquid guiding structure is provided in the side wall of the separation cylinder 1 to receive the liquid separated by the cyclone separation mechanism and the coalescence separation mechanism; The draining mechanism is connected to the liquid outlet end of the liquid guiding structure.

[0025] Liquid-containing wet gas enters tangentially from the inlet pipe 2 into the annular space between the separator 1 and the central pipe 3. The gas first enters the lower cyclone separation assembly, where it rotates and rises under the guidance of the spiral guide vanes 9, completing primary gas-liquid separation. It then passes through the transition annular cavity 27 into the upper cyclone separation assembly, where the spiral guide vanes 9 have a smaller pitch, generating a stronger centrifugal force field for secondary enhanced separation of the remaining fine droplets. Finally, the gas rises into the coalescing fiber media ring 11, where it undergoes deep dehydration through coalescence growth and capillary drainage. The purified gas enters from the top opening of the central pipe 3 and exits downwards through the outlet pipe 4. This invention achieves staged treatment without moving parts, offering high reliability and suitability for flammable, explosive, and high-dust-content gas conditions. The device in this embodiment can be widely used in the pretreatment of natural gas, coalbed methane, and other fuel gases at gas plants, significantly reducing pollutant generation in subsequent combustion stages and providing significant environmental benefits.

[0026] Example 2: Please refer to Figure 2 , Figure 5 and Figure 8Based on Example 1, the liquid guiding structure includes an annular water collecting structure used in conjunction with the coalescence separation mechanism, two spiral water collecting structures used in conjunction with two sets of cyclone separation components, and a liquid collecting annular groove 12 opened at the bottom of the side wall of the separation cylinder 1. Multiple liquid collecting channels 8 are provided between the liquid collecting annular groove 12 and the annular water collecting structure and the spiral water collecting structure, and the liquid collecting channels 8 are used to guide the collected liquid into the liquid collecting annular groove 12.

[0027] The liquid separated in the cyclone separation section is guided along the inner wall of the separation cylinder 1 and the spiral guide vanes 9 into two spiral water collection structures; the liquid separated in the coalescence separation section is captured by an annular water collection structure. After the two liquid streams converge in their respective collection tanks, they are transported downwards to the bottom annular collection tank 12 through multiple liquid collection channels 8 located inside the side wall of the separation cylinder 1. The liquid collection channels 8 are completely internal and do not occupy the main airflow channel inside the cylinder. In this invention, the liquid channel and the airflow channel are physically isolated, avoiding the problem in traditional devices where the separated liquid is re-entrained by the rising airflow during gravity fall; simultaneously, centralized discharge of multi-stage separated liquids is achieved, simplifying the external piping.

[0028] Example 3: Please refer to Figures 2-7 Based on Example 2, the spiral water collection structure includes a spiral water collection trough 10 formed on the inner wall of the separation cylinder 1. The pitch of the two spiral water collection troughs 10 is equal to the pitch of the two spiral guide vanes 9, and the spiral water collection troughs 10 are in communication with the interior of the separation cylinder 1.

[0029] The cyclone separation assembly includes a spiral guide vane 9 fixedly installed between the inner wall of the separation cylinder 1 and the outer periphery of the central tube 3. The spiral guide vane 9 gradually thins from the inner wall of the separation cylinder 1 toward the outer periphery of the central tube 3, that is, the root of the spiral guide vane 9 is thicker and the cross section is wedge-shaped. The root of the bottom surface of the spiral guide vane 9 is located above the corresponding spiral water collection tank 10; A liquid collection and diversion groove 19 is provided at the root of the bottom surface of the spiral guide vane 9, and the liquid collection and diversion groove 19 is connected to the spiral water collection groove 10.

[0030] The top surface of the liquid collection and diversion channel 19 is inclined, and the lower end points towards the spiral water collection channel 10.

[0031] Near the inner wall of the separation cylinder 1, there exists a laminar sublayer with a thickness of approximately 0.1–1 mm. In this region, the radial gas velocity is extremely low. The centrifugal force on fine droplets of 1–10 μm is insufficient to allow them to pass through this low-velocity layer and reach the wall surface; instead, they will slide and escape along the axial direction of this layer. The spiral guide vane 9 of this invention employs a wedge-shaped cross-section design that gradually thins from the inner wall of the separation cylinder 1 towards the central tube 3. This gradually thinning structure causes localized contraction of the airflow channel near the cylinder wall, accelerating the gas and generating strong physical disturbances. This "squeezes" the low-velocity fluid and its carried fine droplets in the laminar sublayer, forcing them into the mainstream region between the vanes. Once in the mainstream region, these droplets immediately acquire sufficient centrifugal force and are thrown towards the vane working surface or the cylinder wall.

[0032] Droplets thrown onto the working surface of the spiral guide vane 9 are easily sheared and broken by the high-speed airflow if they slide along the vane surface towards the cylinder wall, resulting in secondary atomization. This invention provides a liquid collection and diversion groove 19 at the root of the bottom surface of the spiral guide vane 9, which is directly connected to the spiral water collection tank 10. Once a droplet impacts the working surface of the vane, it immediately enters the liquid collection and diversion groove 19, thus escaping the high-speed shearing zone of the main airflow channel. Under the influence of gravity, the droplet flows rapidly downwards along the bottom of the groove and directly merges into the spiral water collection tank 10. The top surface of the liquid collection and diversion groove 19 is designed as an inclined surface pointing inwards, ensuring that the liquid flows smoothly into the tank and is transported downstream along the spiral path, finally entering the liquid collection annular tank 12 via the liquid collection channel 8.

[0033] In this invention, the design of the wedge-shaped gradually thinning blades solves the problem of micro-droplet escape from the laminar sublayer of traditional hydrocyclones, and improves the separation efficiency of 1-10μm droplets; the root liquid collection and drainage groove provides a rapid droplet evacuation channel independent of the blade surface, reducing the probability of secondary entrainment.

[0034] Example 4: Please refer to Figure 2 , Figure 9 and Figure 10 Based on embodiment 3, the annular water collection structure includes a liquid collection annular groove 14 formed in the inner wall of the separation cylinder 1. Multiple annular water absorption grooves 15 are arranged in an array along the axial direction of the separation cylinder 1 on the side of the liquid collection annular groove 14 near the interior of the separation cylinder 1. The liquid collection annular groove 14 communicates with the interior of the separation cylinder 1 through the annular water absorption grooves 15. The cross-section of the annular water suction trough 15 is trapezoidal. The larger end of the annular water suction trough 15 is connected to the interior of the separation cylinder 1, and the smaller end of the annular water suction trough 15 is connected to the liquid collection annular trough 14.

[0035] The coalescing separation mechanism includes a coalescing fiber medium ring 11 fixedly installed between the inner wall of the separation cylinder 1 and the periphery of the central tube 3. The periphery of the coalescing fiber medium ring 11 is arranged in an array along its axial direction with a plurality of annular protrusions 13 that are equal in number and match in shape to the plurality of annular water absorption grooves 15. The plurality of annular protrusions 13 are respectively arranged in the plurality of annular water absorption grooves 15, and the tips of the annular protrusions 13 extend into the liquid collection annular groove 14. The density of the coalesced fiber media ring 11 gradually increases from the central tube 3 to the inner wall of the separation cylinder 1.

[0036] The density of the coalescing fiber medium ring 11 gradually increases from the central tube 3 towards the inner wall of the separation cylinder 1 (lower density inside and higher density outside). Gas preferentially passes through the low-resistance central region, while droplets are captured by the fibers through inertial collisions and interception, spreading and coalescing on the fiber surface, gradually growing from small droplets to large droplets. At the same time, the residual rotating flow field from the swirl section continues to exist, continuously pushing the grown droplets towards the outer edge of the medium.

[0037] Multiple annular protrusions 13 are arranged axially around the periphery of the coalesced fiber media ring 11. The shape of these annular protrusions 13 perfectly matches the multiple annular water absorption grooves 15 opened on the inner wall of the separation cylinder 1, and the tips of the annular protrusions 13 extend into the interior of the liquid collection annular groove 14. The cross-section of the annular water absorption groove 15 is trapezoidal, with its larger end communicating with the interior of the separation cylinder 1 and its smaller end communicating with the liquid collection annular groove 14. The radius of curvature at the tip of the trapezoidal groove is extremely small, generating extremely strong capillary suction. When the coalesced liquid migrates to the tip of the annular protrusion 13, the capillary force "draws" the liquid into the liquid collection annular groove 14. The liquid quickly fills the narrow trapezoidal groove, forming a liquid seal. Due to the existence of liquid surface tension, gas needs to overcome an extremely large bubble breakthrough pressure (far higher than the normal operating pressure difference of the device) to break through this liquid seal, therefore gas cannot enter the liquid collection annular groove 14. In addition, the dense outer and sparse inner structure of the coalesced fiber media ring 11 makes the gas more inclined to travel through the central low-resistance channel, reducing the possibility of the gas being squeezed towards the wall groove.

[0038] Furthermore, multiple annular water-absorbing grooves 15 are arranged at axial intervals, inducing axial drainage microchannels inside the coalesced fiber media ring 11. The liquid inside the media not only migrates radially outwards, but also axially towards the nearest annular protrusion 13, preventing local saturation and the formation of wet spots, and avoiding a decrease in the effective filtration area of ​​the media due to local liquid blockage.

[0039] Through the capillary water absorption and liquid seal structure described above, the device achieves physical isolation of the gas and liquid phases for drainage, avoiding the gas emission problem that accompanies the drainage of traditional separators, and effectively controlling the fugitive release of greenhouse gases such as methane.

[0040] Example 5: Please refer to Figure 5 and Figure 13Based on Example 2, the draining mechanism includes a U-shaped pipe 5 that is connected in a continuous manner to the liquid collection annular groove 12, and a draining component 6 is connected to the end of the U-shaped pipe 5 away from the separation cylinder 1.

[0041] The drainage assembly 6 includes a cylinder 20, with an inlet 22 fixedly connected to a U-shaped pipe 5 at the top and an outlet pipe 21 fixedly connected to the bottom of the cylinder 20. An installation strip 23 is fixedly installed at the upper part of the inner wall of the cylinder 20. A telescopic rod 24 coaxial with the water outlet pipe 21 is fixedly installed on the bottom surface of the installation strip 23. A float ball 25 is fixedly connected to the bottom end of the telescopic rod 24. A conical plug 26 coaxial with the water outlet pipe 21 is fixedly connected to the float ball 25. The conical plug 26 is used to control the opening and closing of the water outlet pipe 21.

[0042] The liquid collecting annular tank 12 collects liquid from each stage of separation and first enters the U-shaped tube 5, which is connected to the liquid collecting annular tank 12. The U-shaped tube 5 always contains a liquid column, forming the first gas barrier. Even if there are pressure fluctuations inside the separation cylinder 1, the liquid column can effectively prevent gas from leaking from the drain pipe.

[0043] The liquid then enters the cylinder 20 of the drainage assembly 6. Initially, when there is no liquid or the liquid level is low, the float 25 and the conical plug 26 extend the telescopic rod 24 under the action of gravity, and the conical plug 26 seals the outlet pipe 21, achieving a second seal. As liquid continuously enters the cylinder 20 and the liquid level rises, the float 25 floats upward under the action of buoyancy, causing the telescopic rod 24 to retract. At the same time, the conical plug 26 rises accordingly, and the outlet pipe 21 gradually opens, allowing the liquid to be discharged under gravity. After the liquid level drops, the float 25 falls, and the conical plug 26 seals the outlet pipe 21 again. This intermittent automatic drainage is performed, with the drainage volume adaptively changing according to the water inflow rate.

[0044] Among them, the U-shaped tube 5 and the float valve (cone plug 26) form a double sealing guarantee, which can maintain airtightness even at the moment of liquid discharge, and there is no risk of gas leakage; Example 6: Please refer to Figure 2 , Figure 5 , Figure 11 and Figure 12 Based on embodiment 1, a flow guide 16 is fixedly installed on the periphery of the central tube 3 near the top. The flow guide 16 is an inverted conical structure. A flow collecting shroud 17 is fixedly installed on the inner top surface of the separator 1, and a flow guide cone 18 coaxial with the central tube 3 is fixedly installed on the inner top surface of the flow collecting shroud 17. The inner top surface edge of the shroud 17 is rounded and chamfered, and the bottom of the inner wall of the shroud 17 is also chamfered.

[0045] The purified gas after coalescence and separation needs to smoothly enter the top opening of the central tube 3 and be discharged downwards. If there is an abrupt change in the flow path or a dead angle, it will cause local eddies and increased pressure drop, and may even re-entrain a small number of incompletely separated droplets.

[0046] In this invention, an inverted conical flow guide shroud 16 is fixedly installed near the top of the central tube 3. When the gas rises to the top, the flow guide shroud 16 smoothly guides the airflow to the surrounding area, avoiding direct impact on the inner wall of the central tube 3 and the generation of strong turbulence. A flow collector shroud 17 is fixedly installed on the inner top surface of the separation cylinder 1, and a flow guide cone 18 coaxial with the central tube 3 is fixedly installed on the inner top surface of the flow collector 17. The edge of the inner top surface of the flow collector 17 is rounded and chamfered, and the bottom of the inner wall of the flow collector 17 is also chamfered. These chamfered surfaces and the flow guide cone 18 together form a gradually narrowing flow channel, guiding the gas to enter the central tube 3 uniformly and smoothly, eliminating dead angles and abrupt changes in cross-section.

[0047] Example 7: Please refer to Figure 14 Based on Example 2, the partition 7 is funnel-shaped, and a through pipe 28 is provided between the bottom of the partition 7 and the upper part of the liquid collecting ring 12. A gate valve 29 is provided in the pipe 28.

[0048] During normal operation, most of the liquid thrown towards the inner wall of the separator 1 by centrifugal force is smoothly discharged into the annular collection tank 12 through structures such as the spiral water collection tank 10, the liquid collection and diversion tank 19, and the liquid collection channel 8. However, in actual working conditions, a very small amount of liquid may still flow downward along the inner wall of the separator 1 in the form of a thin liquid film, and pass over the lowest spiral guide vane 9 to reach the area above the baffle 7.

[0049] In this embodiment, the baffle 7 is designed in a funnel shape, which also serves to collect residual liquid. A very small amount of liquid flowing down the cylinder wall will collect at the bottom of the funnel-shaped baffle 7 under gravity, preventing liquid accumulation on the upper surface of the baffle 7 or re-entrainment by the airflow. A pipe 28 connects the bottom of the baffle 7 to the upper part of the collecting annular groove 12, and a gate valve 29 is installed in the pipe 28. During normal operation, the gate valve 29 remains closed, ensuring that gas above the baffle 7 does not leak into the collecting annular groove 12 through the pipe 28. When drainage is required, the gate valve 29 is opened briefly at regular intervals, allowing the very small amount of liquid accumulated at the bottom of the baffle 7 to drain into the collecting annular groove 12 through the pipe 28 under gravity, after which the gate valve 29 is immediately closed. The drainage operation can be performed intermittently without shutting down the device.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A gas-liquid two-phase separation and processing device for fuel gas, characterized in that, include: The separator (1) is closed at the top and open at the bottom. An air inlet pipe (2) is fixedly installed through the outer periphery of the separator (1) near the bottom. A central tube (3) is coaxially installed in a separator (1). There is a gap between the top end of the central tube (3) and the inner top end of the separator (1). The bottom end of the central tube (3) extends to the bottom of the separator (1) and is fixedly connected to an air outlet pipe (4). A partition plate (7) located between the air inlet pipe (2) and the bottom surface of the separator (1) is fixedly installed between the outer periphery of the central tube (3) and the inner wall of the separator (1). The cyclone separation mechanism includes two sets of cyclone separation components arranged in the separation cylinder (1). The cyclone separation components include spiral guide vanes (9). The spiral guide vanes (9) in the two sets of cyclone separation components have different pitches, with the smaller pitch on top. The two spiral guide vanes (9) form a transition annular cavity (27) between the inner wall of the separation cylinder (1) and the periphery of the central tube (3). A coalescence separation mechanism is disposed in the separation cylinder (1) and positioned above the cyclone separation mechanism; A liquid guiding structure is provided in the side wall of the separation cylinder (1) to receive the liquid separated by the cyclone separation mechanism and the coalescence separation mechanism; A drainage mechanism is connected to the outlet end of the liquid guiding structure.

2. The gas-liquid two-phase separation and processing device according to claim 1, characterized in that, The liquid guiding structure includes an annular water collecting structure used in conjunction with the coalescence separation mechanism, two spiral water collecting structures used in conjunction with two sets of cyclone separation components, and a liquid collecting annular groove two (12) opened at the bottom of the side wall of the separation cylinder (1). Multiple liquid collecting channels (8) are provided between the liquid collecting annular groove two (12), the annular water collecting structure, and the spiral water collecting structure. The liquid collecting channels (8) are used to guide the collected liquid into the liquid collecting annular groove two (12).

3. The gas-liquid two-phase separation and processing device according to claim 2, characterized in that, The spiral water collection structure includes a spiral water collection trough (10) opened on the inner wall of the separation cylinder (1). The pitch of the two spiral water collection troughs (10) is equal to the pitch of the two spiral guide vanes (9). The spiral water collection troughs (10) are connected to the interior of the separation cylinder (1).

4. The gas-liquid two-phase separation and processing device according to claim 3, characterized in that, The cyclone separation assembly includes a spiral guide vane (9) fixedly installed between the inner wall of the separation cylinder (1) and the periphery of the central tube (3). The spiral guide vane (9) gradually thins from the inner wall of the separation cylinder (1) toward the periphery of the central tube (3), that is, the root of the spiral guide vane (9) is thicker and the cross section is wedge-shaped. The root position of the bottom surface of the spiral guide vane (9) is located above the corresponding spiral water collection tank (10); The bottom root of the spiral guide vane (9) is provided with a liquid collection channel (19), which is connected to the spiral water collection channel (10).

5. The gas-liquid two-phase separation and processing device according to claim 4, characterized in that, The top surface of the liquid collection and diversion channel (19) is inclined, and the lower end points towards the spiral water collection channel (10).

6. The gas-liquid two-phase separation and processing device according to claim 2, characterized in that, The annular water collection structure includes a liquid collection annular groove (14) opened in the inner wall of the separation cylinder (1). The liquid collection annular groove (14) has multiple annular water absorption grooves (15) arranged in an array along the axial direction of the separation cylinder (1) on the side near the interior of the separation cylinder (1). The liquid collection annular groove (14) is connected to the interior of the separation cylinder (1) through the annular water absorption grooves (15). The cross-section of the annular water suction groove (15) is trapezoidal. The larger end of the annular water suction groove (15) is connected to the interior of the separation cylinder (1), and the smaller end of the annular water suction groove (15) is connected to the liquid collection annular groove (14).

7. The gas-liquid two-phase separation and processing device according to claim 6, characterized in that, The coalescence separation mechanism includes a coalescing fiber medium ring (11) fixedly installed between the inner wall of the separation cylinder (1) and the periphery of the central tube (3). The periphery of the coalescing fiber medium ring (11) is arranged with a plurality of annular protrusions (13) that are equal in number and match in shape to the plurality of annular water absorption grooves (15). The plurality of annular protrusions (13) are respectively arranged in the plurality of annular water absorption grooves (15), and the tips of the annular protrusions (13) extend into the liquid collection annular groove (14). The density of the coalesced fiber media ring (11) gradually increases from the central tube (3) to the inner wall of the separation cylinder (1).

8. The gas-liquid two-phase separation and processing device according to claim 2, characterized in that, The draining mechanism includes a U-shaped pipe (5) that is connected in a through connection with the liquid collecting annular groove (12), and a draining assembly (6) is connected to one end of the U-shaped pipe (5) away from the separation cylinder (1). The drainage assembly (6) includes a cylinder (20), the top of the cylinder (20) is provided with an inlet (22) which is fixedly connected to the U-shaped pipe (5), and the bottom of the cylinder (20) is fixedly connected with an outlet pipe (21). An installation strip (23) is fixedly installed on the upper part of the inner wall of the cylinder (20). A telescopic rod (24) coaxial with the water outlet pipe (21) is fixedly installed on the bottom surface of the installation strip (23). A float (25) is fixedly connected to the bottom end of the telescopic rod (24). A conical plug (26) coaxial with the water outlet pipe (21) is fixedly connected to the float (25). The conical plug (26) is used to control the opening and closing of the water outlet pipe (21).

9. A gas-liquid two-phase separation and processing device for fuel gas according to claim 1, characterized in that, A flow guide (16) is fixedly installed on the periphery of the central tube (3) near the top. The flow guide (16) is an inverted conical structure. The inner top surface of the separation cylinder (1) is fixedly installed with a flow collecting hood (17), and the inner top surface of the flow collecting hood (17) is fixedly installed with a flow guide cone (18) coaxial with the central tube (3). The inner top surface edge of the shroud (17) is rounded and chamfered, and the bottom of the inner wall of the shroud (17) is also chamfered.

10. A gas-liquid two-phase separation and processing device according to claim 3, characterized in that, The partition (7) is funnel-shaped, and a through pipe (28) is provided between the bottom of the partition (7) and the upper part of the liquid collecting ring (12), and a gate valve (29) is provided in the pipe (28).

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