Vertical pipe type under-pressure efficient gas-liquid separator

Abstract

When the vertical pipe type under-pressure efficient gas-liquid separator is used, liquid-containing gas enters a front vertical pipe through a gas inlet, is uniformly mixed by a static mixer, then enters a swirler and is changed into rotational flow through a spiral belt, and gas containing a very small amount of liquid is discharged from a gas outlet through an outlet cone and an expansion pipe from the inside of a contraction pipe. The gas is efficiently purified; the liquid rotates and enters an annular space between the shrinkage pipe and the separation vertical pipe under the action of gravity, the gas gradually stops rotating through a rotation stopping assembly (rotation stopping blade), and the liquid further passes through the annular space delta between the conical horn mouth and the outlet cone and flows into a liquid storage tank under the continuous action of gravity; and liquid collected by the liquid storage tank can be discharged through the liquid outlet. The device can be suitable for working condition occasions with pressure gas, large treatment gas amount, low operation resistance requirement and high separation efficiency requirement, and is ingenious in design, simple in structure, low in cost and high in safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical engineering heterogeneous phase separation, in particular to the technical field of gas-liquid separation, and specifically refers to a vertical pipe type pressurized high-efficiency gas-liquid separator. Background Art

[0002] Gas-liquid separation is an important chemical unit operation, which can achieve material recovery, purification of target substances, etc. In the production or process of chemical, metallurgical, energy and environmental protection industries, there will be situations where the gas-liquid two-phase mixture needs to be separated. Usually, appropriate separation methods and equipment can be used and a certain amount of materials or energy can be consumed to achieve the purpose. The commonly used "mechanical separation methods" for gas-liquid separation mainly include gravity sedimentation, collision separation, centrifugal separation, Venturi gas-liquid separation, coalescence separation, etc., which are suitable for different particle size ranges. Using different separation principles, the structure of gas-liquid separators is diverse and the performance is quite different, including non-divided inertial separators, wire mesh gas-liquid separators, liquid separation tank separators, two-phase turbine separators, gravity sedimentation separators, parallel coil separators, cyclone separators, centrifugal separators and spiral separators, foam breaking nets and high-efficiency gas-liquid coalescers, etc.

[0003] The gas-liquid separator is an important equipment in the reforming cracking and hydrocracking unit. Its role in the process flow is to remove impurities such as sulfur-containing droplets in the circulating hydrogen gas through reforming cracking and hydrocracking, to ensure the normal operation of the circulating hydrogen-ammonia liquid washing and H2S removal tower, to reduce its operating load, and to protect the heart of the hydrogenation unit - the circulating hydrogen compressor. Another example: before the flare gas in the flare unit of the acetic acid unit enters the flare head, it passes through a gas-liquid separator to completely separate the gas and liquid to prevent droplets from being entrained in the flare gas. As the device develops in the direction of large-scale, it is necessary to purify liquid-containing gases with an operating pressure of 0.1 to 10.0 MPa in the chemical, natural gas and environmental protection industries. Sometimes a single unit is required to process more than 30,000 m3 of gas. 3 / h (operating state), and the liquid content of the gas is very high (sometimes exceeding hundreds of tons per hour). From the current technology point of view, centrifugal separators (cyclone separators or cyclone separators) are still the first choice under the above harsh working conditions. Centrifugal separators are a kind of separation equipment that uses the centrifugal force generated by the high-speed rotation of gaseous inhomogeneous systems to separate droplets from the airflow. Since the centrifugal force on the droplet particles is much greater than gravity, the minimum droplet size that can be economically separated by the centrifugal separator can reach less than 5μm. In addition, the centrifugal separator has a relatively simple structure, is easy to operate and maintain, has stable performance, is not limited by the concentration, temperature, physical properties, etc. of the gas, and has a low cost, so it has been widely used in various industrial production.

[0004] For pressurized gas, large gas processing volume, gas containing liquid working conditions requiring low resistance and high separation efficiency, a combination of multiple mechanical separation principles is usually adopted. For example, Chinese utility model patent CN200981028Y discloses a double eccentric multi-tube cyclone high-efficiency separator, which is provided with two feed ports tangent to the tank body, and the tube center of the inner tube in the cyclone tube deviates from the tube center of the cyclone tube. Due to the use of double tangential feed ports and eccentric cyclone tube structure, the fluid in the feed distribution cavity is guaranteed to be in a cyclone state, the feed amount of each cyclone tube is balanced, the separation efficiency of the cyclone tube is improved, and the large aspect ratio of the cyclone tube increases the cyclone stop time, further improving the separation efficiency. However, it is obvious that the separator is not suitable for larger gas processing volume. Since a large number of cyclone tubes need to be arranged, the diameter of the separator is bound to be too large. At the same time, the separator does not consider the problem of gas cross-mixing at the bottom of multiple cyclone tubes, so the separation efficiency will be affected. For example, Chinese invention patent CN114570118B discloses a multi-stage multi-section separation coordinated integrated tubular gas-liquid separator, which relates to the technical field of oil and gas gathering and processing equipment for onshore or offshore oil fields. The multi-stage multi-section separation coordinated integrated tubular gas-liquid separator provided by the invention mainly implements multiple step separations of the gas-liquid mixture in the tubular separation space through the coordinated integration of two gas-liquid cyclone separations and one gas-liquid gravity sedimentation separation. Although the invention has the advantages of relatively simple structure and high separation efficiency, it is not very adaptable to working conditions with high gas pressure and large gas volume, and its structure is still relatively complex.

[0005] Therefore, it is hoped to provide a pressurized high-efficiency gas-liquid separator that can be applicable to working conditions such as pressurized gas, large gas processing volume, low operating resistance and high separation efficiency. Utility Model Content

[0006] In order to overcome the shortcomings of the above-mentioned prior art, one purpose of the utility model is to provide a vertical pipe type pressurized high-efficiency gas-liquid separator, which can be applicable to working conditions with pressurized gas, large gas processing volume, low operating resistance and high separation efficiency, and is suitable for large-scale promotion and application.

[0007] Another object of the utility model is to provide a vertical pipe type pressurized high-efficiency gas-liquid separator, which has a clever design, a simple structure, a low cost and a high safety performance, and is suitable for large-scale promotion and application.

[0008] In order to achieve the above purpose, the utility model provides a vertical pipe type pressurized high-efficiency gas-liquid separator, which is characterized by comprising a gas inlet, a static mixing section assembly, an inlet separation section assembly, a gas outlet section assembly, a liquid storage tank and a gas outlet, wherein:

[0009] The static mixing section assembly includes a front vertical pipe and a static mixer, wherein the static mixer is vertically arranged in the front vertical pipe, and the gas inlet is arranged on the upper end of the front vertical pipe;

[0010] The inlet separation section assembly comprises a separation vertical pipe, a cyclone and a conical bell mouth, wherein the conical bell mouth is arranged vertically, and the upper end of the conical bell mouth is smaller than the lower end of the conical bell mouth, the cyclone is arranged vertically in the upper part of the separation vertical pipe, the lower end of the separation vertical pipe is arranged on the upper end of the conical bell mouth, and the lower end of the front vertical pipe is arranged on the upper end of the separation vertical pipe;

[0011] The gas outlet section assembly comprises a contraction tube, an outlet cone, an expansion tube and a rotation-stop assembly, wherein the contraction tube, the outlet cone and the expansion tube are all arranged vertically, the upper end of the outlet cone is smaller than the lower end of the outlet cone, the lower end of the contraction tube is arranged on the upper end of the outlet cone, and the lower end of the outlet cone is arranged on the upper end of the expansion tube, and the rotation-stop assembly comprises a plurality of rotation-stop blades, wherein the rotation-stop blades are arranged along the radial direction of the contraction tube and are located outside the middle and lower part of the contraction tube and connected to the middle and lower part of the contraction tube, and the plurality of rotation-stop blades are arranged horizontally around the middle and lower part of the contraction tube and are arranged at intervals from each other;

[0012] The liquid storage tank is arranged vertically, and a drain port is arranged at the bottom of the side wall of the liquid storage tank. The separation vertical pipe is vertically inserted in the top of the liquid storage tank, and the expansion tube is vertically inserted in the bottom of the liquid storage tank. The outlet cone vertically penetrates the lower end of the separation vertical pipe and the upper end of the conical bell mouth. The contraction tube and the anti-rotation assembly are both located in the separation vertical pipe and are both located below the cyclone. The upper end of the expansion tube is located in the conical bell mouth, and the lower end of the expansion tube is located under the bottom of the liquid storage tank and is arranged on the gas outlet. The front vertical pipe, the separation vertical pipe, the conical bell mouth, the contraction tube, the outlet cone and the expansion tube are all coaxially arranged, and the inner diameters of the pipes of the front vertical pipe, the separation vertical pipe and the expansion tube are the same.

[0013] Preferably, the static mixer includes an upper porous fixed plate, a mixing element and a lower porous fixed plate, the upper porous fixed plate and the lower porous fixed plate are both horizontally arranged and spaced apart from each other up and down, the mixing element is vertically arranged and located between the upper porous fixed plate and the lower porous fixed plate and is respectively connected to the upper porous fixed plate and the lower porous fixed plate, the upper porous fixed plate, the mixing element and the lower porous fixed plate are all located in the front vertical pipe and are connected to the inner side wall of the front vertical pipe.

[0014] More preferably, the ratio U / D1 of the length U of the mixing element to the inner diameter D1 of the front vertical pipe is 3-6.

[0015] Preferably, the cone angle α1 of the conical bell mouth is 30° to 65°, and the inner diameter D1 of the separation vertical pipe is ≤400 mm.

[0016] Preferably, the cone angle α2 of the outlet cone is 30° to 65°, and the inner diameter D1 of the expansion pipe is ≤400 mm.

[0017] Preferably, the ratio L / D1 of the distance L from the upper end of the contraction tube to the lower end of the conical bell mouth to the inner diameter D1 of the pipe of the separation vertical pipe is 2.5-5.0, the annular gap δ between the conical bell mouth and the outlet cone is 6mm-25mm, and the ratio H / D1 of the spacing H between the contraction tube and the cyclone to the inner diameter D1 of the pipe of the separation vertical pipe is 1.5-3.5.

[0018] Preferably, the cyclone includes an elliptical straightening head, a cyclone cylinder, a pointed cone and a spiral belt. The elliptical straightening head, the cyclone cylinder and the pointed cone are all arranged vertically and arranged in sequence from top to bottom. The elliptical surface of the elliptical straightening head is arranged upward, the lower end of the pointed cone is a pointed end, and the spiral belt is vertically arranged on the outer surface of the cyclone cylinder and connected to the inner side wall of the upper part of the separation vertical pipe.

[0019] More preferably, the spiral pitch of the spiral band is W, the length of the spiral band is 3W-5W, and the ratio D2 / D1 of the diameter D2 of the cyclone cylinder to the inner diameter D1 of the separation vertical pipe is 0.35-0.65.

[0020] Preferably, the liquid storage tank includes an upper head, a tank body and a lower head, the tank body is vertically arranged, the upper head is arranged on the upper end of the tank body, the lower end of the tank body is arranged on the lower head, the separation vertical pipe is vertically inserted in the upper head, the expansion tube is vertically inserted in the lower head, the conical bell mouth is located in the tank body, and the drain port is arranged at the bottom of the side wall of the tank body.

[0021] More preferably, the lower head and the upper head are both elliptical heads, the tank body is a tubular tank body, and the inner diameter D3 of the pipe of the tubular tank body is ≤500mm.

[0022] The beneficial effects of the utility model are mainly:

[0023] 1. When the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model is used, the liquid-containing gas enters the front vertical tube through the gas inlet, is evenly mixed in the static mixer, and then enters the cyclone, and is converted into a rotating flow through the spiral belt. The gas containing a very small amount of liquid is discharged from the inside of the contraction tube and through the outlet cone and the expansion tube from the gas outlet, and the gas is efficiently purified; the liquid rotates and enters the annular gap between the contraction tube and the separation vertical tube under the action of gravity, and the gas gradually stops rotating through the anti-rotation component (anti-rotation blade), and the liquid further passes through the annular gap δ between the conical bell mouth and the outlet cone and flows into the liquid storage tank under the continuous action of gravity. The liquid collected in the liquid storage tank can be discharged through the drain port. Therefore, it can be applied to pressurized gas, large gas processing volume, low operating resistance and high separation efficiency, and is suitable for large-scale promotion and application.

[0024] 2. When the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model is in use, the liquid-containing gas enters the front vertical tube through the gas inlet, is evenly mixed in the static mixer, and then enters the cyclone, and is converted into a rotating flow through the spiral belt. The gas containing a very small amount of liquid is discharged from the inside of the contraction tube and through the outlet cone and the expansion tube from the gas outlet, and the gas is efficiently purified; the liquid rotates and enters the annular gap between the contraction tube and the separation vertical tube under the action of gravity, and the gas gradually stops rotating through the anti-rotation component (anti-rotation blade), and the liquid further passes through the annular gap δ between the conical bell mouth and the outlet cone and flows into the liquid storage tank under the continuous action of gravity. The liquid collected in the liquid storage tank can be discharged through the drain port. Therefore, it has a clever design, a simple structure, low cost and high safety performance, and is suitable for large-scale promotion and application.

[0025] These and other objects, features and advantages of the present invention are fully reflected in the following detailed description and drawings, and can be achieved by the means, devices and their combinations specifically pointed out in the content of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front perspective schematic diagram of a specific embodiment of the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model.

[0027] Figure 2 yes Figure 1 A schematic front view of a static mixer of a specific embodiment is shown.

[0028] Figure 3 yes Figure 1 The inlet separation section assembly of the specific embodiment shown is a front view schematic diagram without the cyclone.

[0029] Figure 4 yes Figure 1 The schematic front view of the cyclone of the inlet separation section assembly of the specific embodiment shown is shown.

[0030] Figure 5 yes Figure 1 A schematic front view of a gas outlet section assembly of a specific embodiment is shown.

[0031] Figure 6 yes Figure 1 A front schematic view of a liquid storage tank of a specific embodiment is shown.

[0032] (Explanation of symbols)

[0033] 1 Gas inlet;

[0034] 2 static mixing section assembly; 21 front vertical pipe; 22 static mixer; 23 upper porous fixing plate; 24 mixing element; 25 lower porous fixing plate;

[0035] 3 inlet separation section assembly; 31 separation vertical pipe; 32 cyclone; 33 conical bell mouth; 34 elliptical rectifying head; 35 cyclone cylinder; 36 pointed cone; 37 spiral belt;

[0036] 4 gas outlet section assembly; 41 contraction tube; 42 outlet cone; 43 expansion tube; 44 anti-rotation assembly; 45 anti-rotation blade;

[0037] 5 liquid storage tank; 51 upper head; 52 tank body; 53 lower head;

[0038] 6 Gas outlet;

[0039] 7 drain port. DETAILED DESCRIPTION

[0040] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0042] See also Figure 1 to Figure 6 As shown, in a specific embodiment of the utility model, the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model comprises a gas inlet 1, a static mixing section assembly 2, an inlet separation section assembly 3, a gas outlet section assembly 4, a liquid storage tank 5 and a gas outlet 6, wherein:

[0043] The static mixing section assembly 2 includes a front vertical pipe 21 and a static mixer 22, wherein the static mixer 22 is vertically arranged in the front vertical pipe 21, and the gas inlet 1 is arranged on the upper end of the front vertical pipe 21;

[0044] The inlet separation section assembly 3 includes a separation vertical pipe 31, a cyclone 32 and a conical bell mouth 33, wherein the conical bell mouth 33 is vertically arranged, and the upper end of the conical bell mouth 33 is smaller than the lower end of the conical bell mouth 33, the cyclone 32 is vertically arranged in the upper part of the separation vertical pipe 31, the lower end of the separation vertical pipe 31 is arranged on the upper end of the conical bell mouth 33, and the lower end of the front vertical pipe 21 is arranged on the upper end of the separation vertical pipe 31;

[0045] The gas outlet section assembly 4 comprises a contraction tube 41, an outlet cone 42, an expansion tube 43 and an anti-rotation assembly 44. The contraction tube 41, the outlet cone 42 and the expansion tube 43 are all arranged vertically. The upper end of the outlet cone 42 is smaller than the lower end of the outlet cone 42. The lower end of the contraction tube 41 is arranged on the upper end of the outlet cone 42. The lower end of the outlet cone 42 is arranged on the upper end of the expansion tube 43. The anti-rotation assembly 44 comprises a plurality of anti-rotation blades 45. The anti-rotation blades 45 are arranged along the radial direction of the contraction tube 41 and are located outside the middle and lower part of the contraction tube 41 and connected to the middle and lower part of the contraction tube 41. The plurality of anti-rotation blades 45 are arranged horizontally around the middle and lower part of the contraction tube 41 and are arranged at intervals from each other.

[0046] The liquid storage tank 5 is arranged vertically, and a drain port 7 is arranged at the bottom of the side wall of the liquid storage tank 5. The separation vertical pipe 31 is vertically inserted in the top of the liquid storage tank 5, and the expansion pipe 43 is vertically inserted in the bottom of the liquid storage tank 5. The outlet cone 42 vertically penetrates the lower end of the separation vertical pipe 31 and the upper end of the conical bell mouth 33. The contraction tube 41 and the anti-rotation assembly 44 are both located in the separation vertical pipe 31 and are both located below the cyclone 32. The upper end of the expansion tube 43 is located in the conical bell mouth 33, and the lower end of the expansion tube 43 is located under the bottom of the liquid storage tank 5 and is arranged on the gas outlet 6. The front vertical pipe 21, the separation vertical pipe 31, the conical bell mouth 33, the contraction tube 41, the outlet cone 42 and the expansion tube 43 are all coaxially arranged, and the inner diameter of the pipe of the front vertical pipe 21, the inner diameter of the pipe of the separation vertical pipe 31 and the inner diameter of the pipe of the expansion tube 43 are all the same.

[0047] The anti-rotation blade 45 may have any suitable shape. Figure 1 and Figure 5As shown, in a specific embodiment of the present utility model, the anti-rotation blade 45 is a rectangular blade, and the rectangular blade is vertically arranged and arranged along the radial direction of the shrink tube 41.

[0048] The number of the anti-rotation blades 45 can be determined as needed. The above-mentioned "multiple blades" refers to more than 2 blades. Figure 1 and Figure 5 As shown, in a specific embodiment of the present utility model, the number of the anti-rotation blades 45 is two, and the two anti-rotation blades 45 are symmetrically arranged on the left and right sides.

[0049] The number of the anti-rotation components 44 can be determined as needed. Preferably, the number of the anti-rotation components 44 is multiple, and the multiple anti-rotation components 44 are vertically spaced from each other. The length of the anti-rotation blade 45 of the anti-rotation component 44 located at the top is shorter than the length of the anti-rotation blade 45 of the anti-rotation component 44 located at the bottom. The above "multiple" means more than 2, see Figure 1 and Figure 5 As shown, in a specific embodiment of the present invention, the number of the anti-rotation components 44 is three.

[0050] The static mixer 22 may have any suitable configuration. Figure 1-2 As shown, in a specific embodiment of the present utility model, the static mixer 22 includes an upper porous fixing plate 23, a mixing element 24 and a lower porous fixing plate 25, the upper porous fixing plate 23 and the lower porous fixing plate 25 are both horizontally arranged and spaced apart from each other up and down, the mixing element 24 is vertically arranged and located between the upper porous fixing plate 23 and the lower porous fixing plate 25 and connected to the upper porous fixing plate 23 and the lower porous fixing plate 25 respectively, the upper porous fixing plate 23, the mixing element 24 and the lower porous fixing plate 25 are all located in the front vertical pipe 21 and are connected to the inner side wall of the front vertical pipe 21.

[0051] The ratio U / D1 of the length U of the mixing element 24 (i.e., the size of the mixing element 24 in the vertical direction) and the inner diameter D1 of the pipe of the front vertical pipe 21 can be determined as needed. More preferably, the ratio U / D1 of the length U of the mixing element 24 and the inner diameter D1 of the pipe of the front vertical pipe 21 is 3 to 6. In a specific embodiment of the present invention, the ratio U / D1 of the length U of the mixing element 24 and the inner diameter D1 of the pipe of the front vertical pipe 21 is 3.

[0052] The cone angle α1 of the conical bell mouth 33 and the inner diameter D1 of the separation vertical pipe 31 can be determined as needed. Preferably, the cone angle α1 of the conical bell mouth 33 is 30° to 65°, and the inner diameter D1 of the separation vertical pipe 31 is ≤ 400 mm. In a specific embodiment of the present utility model, the cone angle α1 of the conical bell mouth 33 is 30°, and the inner diameter D1 of the separation vertical pipe 31 is 400 mm.

[0053] The cone angle α2 of the outlet cone 42 and the inner diameter D1 of the expansion tube 43 can be determined as needed. Preferably, the cone angle α2 of the outlet cone 42 is 30° to 65°, and the inner diameter D1 of the expansion tube 43 is ≤ 400 mm. In a specific embodiment of the present utility model, the cone angle α2 of the outlet cone 42 is 30°, and the inner diameter D1 of the expansion tube 43 is 400 mm.

[0054] The ratio L / D1 of the distance L from the upper end of the shrinkable tube 41 to the lower end of the conical bell mouth 33 (i.e., the length of the gas outlet section assembly 4 inserted into the inlet separation section assembly 3) to the pipe inner diameter D1 of the separation vertical pipe 31, the annular gap δ between the conical bell mouth 33 and the outlet cone 42, and the ratio H / D1 of the distance H between the shrinkable tube 41 and the cyclone 32 to the pipe inner diameter D1 of the separation vertical pipe 31 can be determined as needed. Preferably, the ratio L / D1 of the distance L from the upper end of the shrinkable tube 41 to the lower end of the conical bell mouth 33 to the pipe inner diameter D1 of the separation vertical pipe 31 is 2.5-5.0, the annular gap δ between the conical bell mouth 33 and the outlet cone 42 is 6 mm-25 mm, and the ratio H / D1 of the distance H between the shrinkable tube 41 and the cyclone 32 to the pipe inner diameter D1 of the separation vertical pipe 31 is 1.5-3.5. In a specific embodiment of the present utility model, the ratio L / D1 of the distance L from the upper end of the contraction tube 41 to the lower end of the conical bell mouth 33 to the inner diameter D1 of the pipe of the separation vertical pipe 31 is 2.5, the annular gap δ between the conical bell mouth 33 and the outlet cone 42 is 25 mm, and the ratio H / D1 of the distance H between the contraction tube 41 and the cyclone 32 to the inner diameter D1 of the pipe of the separation vertical pipe 31 is 1.5.

[0055] The cyclone 32 may have any suitable configuration. Figure 1 and Figure 4As shown, in a specific embodiment of the utility model, the cyclone 32 includes an elliptical straightening head 34, a cyclone cylinder 35, a pointed cone 36 and a spiral belt 37. The elliptical straightening head 34, the cyclone cylinder 35 and the pointed cone 36 are all arranged vertically and arranged in sequence from top to bottom. The elliptical surface of the elliptical straightening head 34 is arranged upward, the lower end of the pointed cone 36 is a pointed end, and the spiral belt 37 is vertically arranged on the outer surface of the cyclone cylinder 35 and connected to the inner side wall of the upper part of the separation vertical pipe 31.

[0056] The ratio of the length of the spiral band 37 to the spiral pitch of the spiral band 37, and the ratio D2 / D1 of the diameter D2 of the cyclone cylinder 35 to the inner diameter D1 of the separation vertical pipe 31 can be determined as needed. More preferably, the spiral pitch of the spiral band 37 is W, the length of the spiral band 37 is 3W to 5W, and the ratio D2 / D1 of the diameter D2 of the cyclone cylinder 35 to the inner diameter D1 of the separation vertical pipe 31 is 0.35 to 0.65. In a specific embodiment of the present utility model, the length of the spiral band 37 is 3W, and the ratio D2 / D1 of the diameter D2 of the cyclone cylinder 35 to the inner diameter D1 of the separation vertical pipe 31 is 0.35.

[0057] The liquid storage tank 5 may have any suitable configuration. Figure 1 and Figure 6 As shown, in a specific embodiment of the present utility model, the liquid storage tank 5 includes an upper head 51, a tank body 52 and a lower head 53, the tank body 52 is vertically arranged, the upper head 51 is arranged on the upper end of the tank body 52, the lower end of the tank body 52 is arranged on the lower head 53, the separation vertical pipe 31 is vertically inserted in the upper head 51, the expansion pipe 43 is vertically inserted in the lower head 53, the conical bell mouth 33 is located in the tank body 52, and the drain port 7 is arranged at the bottom of the side wall of the tank body 52.

[0058] The lower head 53, the upper head 51 and the tank body 52 may have any suitable shape. Preferably, the lower head 53 and the upper head 51 are both elliptical heads, and the tank body 52 is a tubular tank body, and the inner diameter D3 of the pipe of the tubular tank body is ≤500 mm. In a specific embodiment of the present utility model, the inner diameter D3 of the pipe of the tubular tank body is 500 mm.

[0059] The front vertical pipe 21, the separation vertical pipe 31, the conical bell mouth 33, the contraction tube 41, the outlet cone 42 and the expansion tube 43 can be pipes of any suitable material. In a specific embodiment of the present utility model, the front vertical pipe 21, the separation vertical pipe 31, the conical bell mouth 33, the contraction tube 41, the outlet cone 42 and the expansion tube 43 are all steel pipes.

[0060] In another specific embodiment of the present invention, Figure 1 to Figure 6 The specific embodiment shown is different in that the ratio U / D1 of the length U of the mixing element 24 and the inner diameter D1 of the pipe of the front vertical pipe 21 is 6; the cone angle α1 of the conical bell mouth 33 is 65°, and the inner diameter D1 of the pipe of the separation vertical pipe 31 is 100 mm; the cone angle α2 of the outlet cone 42 is 65°, and the inner diameter D1 of the pipe of the expansion pipe 43 is 100 mm; the distance L from the upper end of the contraction tube 41 to the lower end of the conical bell mouth 33 is the same as the pipe of the separation vertical pipe 31. The ratio L / D1 of the inner diameter D1 of the separation tube 31 is 5.0, the annular gap δ between the conical bell mouth 33 and the outlet cone 42 is 6 mm, the ratio H / D1 of the spacing H between the contraction tube 41 and the cyclone 32 to the inner diameter D1 of the separation vertical tube 31 is 3.5; the length of the spiral belt 37 is 5W, the ratio D2 / D1 of the diameter D2 of the cyclone cylinder 35 to the inner diameter D1 of the separation vertical tube 31 is 0.65; the inner diameter D3 of the tube body is 200 mm.

[0061] The working principle of the utility model is: the liquid-containing gas enters from top to bottom, that is, first enters the front vertical pipe 21 through the gas inlet 1, and the gas-liquid mixture, that is, the liquid-containing gas, enters the static mixer 22. The mixing element 24 in the static mixer 22 can make the gas phase and the liquid phase under different inlet gas content conditions uniformly mixed, that is, reduce the influence of flow pattern changes on the separation process, and ensure the stability of the separation process. The homogenized gas-liquid mixture then enters the cyclone 32. Due to the rotating flow-guiding effect of the spiral belt 37, the flow pattern of the gas-liquid mixture changes from direct current to rotating flow, forming the centrifugal force field required for the separation of gas and liquid phases. Under the strong centrifugal force, the gas phase with a lighter density migrates to the center of the separator to form a gas core, and the liquid phase with a higher density migrates to the inner wall of the separator to form a liquid film. After being fully separated over a distance, the gas containing a very small amount of liquid is discharged from the inside of the contraction tube 41 through the outlet cone 42 and the expansion tube 43 from the gas outlet 6, that is, the gas is efficiently purified; the liquid rotates and enters the annular gap between the contraction tube 41 and the separation vertical pipe 31 under the action of gravity. Since there is a rotation-stopping component 44 (rotation-stopping blade 45) between the contraction tube 41 and the separation vertical pipe 31, the gas in this area gradually stops rotating, and the liquid further passes through the annular gap δ between the conical bell mouth 33 and the outlet cone 42 and flows into the liquid storage tank 5 under the continuous action of gravity. The liquid collected in the liquid storage tank 5 can be discharged through the drain port 7, thus completing the entire gas-liquid separation process.

[0062] The utility model provides a vertical pipe type pressurized high-efficiency gas-liquid separator suitable for multiple units to be operated in parallel to process large air volume. The parallel mode preferably adopts a matrix arrangement with a compact structure.

[0063] The vertical tube type pressurized high-efficiency gas-liquid separator of the utility model is suitable for multi-stage series operation to improve separation efficiency. The series connection mode only requires the separators to be directly connected at the head and tail, which is convenient and quick.

[0064] Taking the gas-liquid separator project of a shale gas well in Sichuan Province as an example, the liquid gas composition is: methane, ethane, propane and water, the operating temperature is 10-40℃, the operating pressure is 1.9-4.0MPa, and the total gas flow rate is 260000-300000Nm 3 / h, water content about 52m 3 / h, originally used a horizontal cyclone separator from a well-known domestic manufacturer, with an inner diameter of 2600mm and a length of 7630mm. After actual on-site measurement, its operating data is: the water content in the gas phase outlet is 0.137g / m 3 , that is, the total efficiency of the separator is 98.5%, and the total resistance of the separator is 57.4kPa. Due to the poor effect, the user modified the original separator and adopted a large-scale matrix separator composed of the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model. The inner diameter of a single vertical tube type pressurized high-efficiency gas-liquid separator is 400mm, and the total height is 3250mm (that is, the inner diameter D1 of the front vertical pipe 21 is 400mm, and the length U of the mixing element 24 is 3D1=1200mm; the cone angle α1 of the conical bell mouth 33 is 30°, and the inner diameter D1 of the separation vertical pipe 31 is 400mm; the cone angle α2 of the outlet cone 42 is 30°, and the inner diameter D1 of the expansion pipe 43 is 400mm; the upper end of the contraction tube 41 to the conical bell mouth The distance L of the lower end of the outlet 33 is 2.5D1=1000mm, the annular gap δ between the conical bell mouth 33 and the outlet cone 42 is 25mm, the spacing H between the contraction tube 41 and the cyclone 32 is 1.5D1=600mm; the spiral spacing W of the spiral belt 37 is 160mm, the length of the spiral belt 37 is 3W=480mm, the diameter D2 of the cyclone cylinder 35 is 0.35D1=140mm; the inner diameter D3 of the pipe of the tank body 52 of the liquid storage tank 5 is 500mm), a total of 9 units are connected in parallel, arranged in a 3x3 matrix. After the transformation, the operating data are measured as follows: the mist content at the gas phase outlet is 0.011g / m 3 , that is, the total efficiency of the large-scale high-efficiency gas-liquid separator is 99.9%, and the total resistance of the separator is 34.8kPa. Comparing the measured data of the two, it can be known that the large-scale matrix riser type pressurized high-efficiency gas-liquid separator has very obvious advantages and is suitable for pressurized gas, large processing gas volume, low resistance and high separation efficiency.

[0065] Therefore, the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model is used to continuously separate gas-liquid mixtures, and is particularly suitable for pressurized gas, large gas processing volume, low operating resistance and high separation efficiency. It has the advantages of simple structure, low cost and high safety performance. The utility model has the following characteristics:

[0066] a) Very suitable for operation under high pressure conditions, and the manufacturing cost is greatly reduced.

[0067] The utility model can use carbon steel or stainless steel standard steel pipe as the pressure shell for pressurized working conditions, especially high-pressure working conditions. Due to its small diameter, it can withstand very high internal and external pressures, making up for the defect of large thickness of the pressure shell of the large-diameter gas-liquid separator, that is, the pressure shell strength safety factor of the utility model is high, and all parts meet the national mandatory specifications for the design and manufacture of pressure vessels. Since the main pressure-bearing parts can be selected from standard parts, the manufacturing cost can be greatly reduced.

[0068] b) A matrix parallel arrangement scheme can be adopted to easily meet large-scale requirements.

[0069] In view of the requirement of large gas volume and high efficiency separation, the utility model does not use a plurality of relatively large diameter vertical tube type pressurized high efficiency gas-liquid separators in parallel, but adopts a large number of relatively small diameter (tube inner diameter is below 400mm) vertical tube type pressurized high efficiency gas-liquid separators in parallel (such as matrix arrangement), because relatively small diameter cyclone (i.e. vertical tube type pressurized high efficiency gas-liquid separator of the utility model) can obtain greater centrifugal force, thereby obtaining higher separation efficiency. At the same time, the manufacturing difficulty of the relatively small diameter vertical tube type pressurized high efficiency gas-liquid separator is relatively low, and its cost advantage is more obvious after large-scale production.

[0070] c) A multi-stage series arrangement can be used to solve the problem of low separation efficiency in single-stage treatment.

[0071] The vertical tube type high-efficiency gas-liquid separator with pressure relies on the centrifugal separation mechanism. Usually, the efficiency of a single-stage separator is not very high. In order to further improve the separation efficiency, two-stage, three-stage or more separators can be connected in series to improve the separation efficiency. The separator of the rear stage is often designed with a higher inlet centrifugal gas velocity (by reducing the cross-sectional area of ​​the inlet spiral belt) to achieve a higher separation effect. The multi-stage series connection of the vertical tube type high-efficiency gas-liquid separator with pressure is very simple. The separators can be directly connected head to tail. Compared with other structural types of gas-liquid separators, its multi-stage combination method is simple and fast, and it is also very convenient for inspection and maintenance.

[0072] d) Vertical pipe type pressurized high-efficiency gas-liquid separator has the inherent advantage of low operating resistance.

[0073] The core mechanism of the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model is the centrifugal separation mechanism. According to Newton's second law: the centrifugal force obtained by a substance in a centrifugal field is inversely proportional to the rotation radius. Therefore, under the same inlet gas velocity, a small-diameter cyclone (i.e., the vertical tube type pressurized high-efficiency gas-liquid separator of the utility model) can obtain a greater centrifugal force, or in other words, even under the condition of a lower inlet gas velocity, a small-diameter cyclone can still obtain a centrifugal force not less than that of a large-diameter cyclone, and at this time, the running resistance of the small-diameter cyclone will be relatively much smaller. It can be said that a small-diameter cyclone has the inherent advantage of low running resistance.

[0074] e) The vertical pipe type pressurized high-efficiency gas-liquid separator is the first to have a static mixer in front, which makes it possible to improve the efficiency of gas-liquid separation.

[0075] The utility model provides a static mixer at the inlet end of the vertical tube type pressurized high-efficiency gas-liquid separator. The static mixer is a high-efficiency mixing device without moving parts. The utility model introduces the static mixer into the field of gas-liquid separation for the first time. Its basic working mechanism is to use the mixing element fixed in the tube to change the flow state of the fluid in the tube to achieve the purpose of good dispersion and full mixing between different fluids, which is equivalent to the pretreatment of gas-liquid separation. The utility model provides a static mixer to evenly mix the gas phase and the liquid phase under different inlet gas holdup conditions, so as to reduce the influence of flow pattern changes on the separation process and ensure the stability of the entire gas-liquid separation process.

[0076] In summary, the vertical pipe type pressurized high-efficiency gas-liquid separator of the utility model is suitable for working conditions with pressurized gas, large gas processing volume, low operating resistance and high separation efficiency. It has a clever design, simple structure, low cost and high safety performance, and is suitable for large-scale promotion and application.

[0077] It can be seen that the purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods can be modified at will. Therefore, the utility model includes all modified implementation methods based on the spirit and scope of the claims.

Claims

1. A vertical tube type pressurized high-efficiency gas-liquid separator, characterized in that: It includes a gas inlet, a static mixing section assembly, an inlet separation section assembly, a gas outlet section assembly, a liquid storage tank and a gas outlet, wherein: The static mixing section assembly includes a front vertical pipe and a static mixer, wherein the static mixer is vertically arranged in the front vertical pipe, and the gas inlet is arranged on the upper end of the front vertical pipe; The inlet separation section assembly comprises a separation vertical pipe, a cyclone and a conical bell mouth, wherein the conical bell mouth is arranged vertically, and the upper end of the conical bell mouth is smaller than the lower end of the conical bell mouth, the cyclone is arranged vertically in the upper part of the separation vertical pipe, the lower end of the separation vertical pipe is arranged on the upper end of the conical bell mouth, and the lower end of the front vertical pipe is arranged on the upper end of the separation vertical pipe; The gas outlet section assembly comprises a contraction tube, an outlet cone, an expansion tube and a rotation-stop assembly, wherein the contraction tube, the outlet cone and the expansion tube are all arranged vertically, the upper end of the outlet cone is smaller than the lower end of the outlet cone, the lower end of the contraction tube is arranged on the upper end of the outlet cone, and the lower end of the outlet cone is arranged on the upper end of the expansion tube, and the rotation-stop assembly comprises a plurality of rotation-stop blades, wherein the rotation-stop blades are arranged along the radial direction of the contraction tube and are located outside the middle and lower part of the contraction tube and connected to the middle and lower part of the contraction tube, and the plurality of rotation-stop blades are arranged horizontally around the middle and lower part of the contraction tube and are arranged at intervals from each other; The liquid storage tank is arranged vertically, and a drain port is arranged at the bottom of the side wall of the liquid storage tank. The separation vertical pipe is vertically inserted in the top of the liquid storage tank, and the expansion tube is vertically inserted in the bottom of the liquid storage tank. The outlet cone vertically penetrates the lower end of the separation vertical pipe and the upper end of the conical bell mouth. The contraction tube and the anti-rotation assembly are both located in the separation vertical pipe and are both located below the cyclone. The upper end of the expansion tube is located in the conical bell mouth, and the lower end of the expansion tube is located under the bottom of the liquid storage tank and is arranged on the gas outlet. The front vertical pipe, the separation vertical pipe, the conical bell mouth, the contraction tube, the outlet cone and the expansion tube are all coaxially arranged, and the inner diameters of the pipes of the front vertical pipe, the separation vertical pipe and the expansion tube are the same.

2. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The static mixer includes an upper porous fixed plate, a mixing element and a lower porous fixed plate. The upper porous fixed plate and the lower porous fixed plate are both horizontally arranged and spaced apart from each other up and down. The mixing element is vertically arranged and located between the upper porous fixed plate and the lower porous fixed plate and is respectively connected to the upper porous fixed plate and the lower porous fixed plate. The upper porous fixed plate, the mixing element and the lower porous fixed plate are all located in the front vertical pipe and are connected to the inner side wall of the front vertical pipe.

3. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 2, characterized in that: The ratio U / D1 of the length U of the mixing element to the inner diameter D1 of the front vertical pipe is 3-6.

4. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The cone angle α1 of the conical bell mouth is 30° to 65°, and the inner diameter D1 of the separation vertical pipe is ≤400 mm.

5. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The cone angle α2 of the outlet cone is 30° to 65°, and the inner diameter D1 of the expansion pipe is ≤400 mm.

6. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The ratio L / D1 of the distance L from the upper end of the contraction tube to the lower end of the conical bell mouth to the inner diameter D1 of the separation vertical pipe is 2.5 to 5.0, the annular gap δ between the conical bell mouth and the outlet cone is 6 mm to 25 mm, and the ratio H / D1 of the spacing H between the contraction tube and the cyclone to the inner diameter D1 of the separation vertical pipe is 1.5 to 3.

5.

7. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The cyclone comprises an elliptical straightening head, a cyclone cylinder, a pointed cone and a spiral belt. The elliptical straightening head, the cyclone cylinder and the pointed cone are all arranged vertically and arranged in sequence from top to bottom. The elliptical surface of the elliptical straightening head is arranged upward, the lower end of the pointed cone is a pointed end, and the spiral belt is vertically arranged on the outer surface of the cyclone cylinder and connected to the inner side wall of the upper part of the separation vertical pipe.

8. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 7, characterized in that: The spiral pitch of the spiral band is W, the length of the spiral band is 3W-5W, and the ratio D2 / D1 of the diameter D2 of the cyclone cylinder to the inner diameter D1 of the separation vertical pipe is 0.35-0.

65.

9. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 1, characterized in that: The liquid storage tank includes an upper head, a tank body and a lower head. The tank body is vertically arranged, the upper head is arranged on the upper end of the tank body, the lower end of the tank body is arranged on the lower head, the separation vertical pipe is vertically inserted in the upper head, the expansion tube is vertically inserted in the lower head, the conical bell mouth is located in the tank body, and the drain port is arranged at the bottom of the side wall of the tank body.

10. The vertical tube type pressurized high-efficiency gas-liquid separator according to claim 9, characterized in that: The lower head and the upper head are both elliptical heads, the tank body is a tubular tank body, and the inner diameter D3 of the pipe of the tubular tank body is ≤500mm.

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