Gas-liquid separation equipment and separation method

Abstract

The invention provides gas-liquid separation equipment which comprises an outer shell extending in the vertical direction and a gas-liquid mixture feeding pipe inserted into the outer shell and connected with the outer shell in a sealed mode, and the outer shell and the gas-liquid mixture feeding pipe are concentrically arranged. The exhaust pipe is laterally inserted into the gas-liquid mixture feeding pipe and is hermetically connected with the gas-liquid mixture feeding pipe; the gas-liquid mixture feeding pipe and the exhaust pipe are concentrically arranged; a gas-liquid mixture feeding port is formed in the gas-liquid mixture feeding pipe, an exhaust port is formed in the exhaust pipe, the gas-liquid mixture feeding port and the exhaust port are located at the upper end of the outer shell, and a liquid discharging port is formed in the lower end of the outer shell; wherein the side wall of the gas-liquid mixture feeding pipe is provided with a rotational flow mechanism used for outputting fluid in the feeding pipe into the outer shell in a rotational flow flowing mode, and the lower end of the gas-liquid mixture feeding pipe is provided with a feeding pipe plugging plate; according to the gas-liquid separation equipment, the entrainment effect of airflow on liquid drops in the gas-liquid separation process is reduced, the disturbance of gas on liquid drop flowing is reduced, and the separation efficiency in the gas-liquid separation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical separation equipment, and in particular to a gas-liquid separation equipment and a separation method. Background Art

[0002] Gas-liquid separation equipment is widely used in the fields of energy and chemical industry, mainly used in natural gas transportation and purification, deep-sea oil, gas and water separation, distillation tower / scrubber demisting separation and reaction product separation. The structure and principle of gas-liquid separation equipment are generally different for different application backgrounds. At present, there are many separation equipments using the centrifugal separation principle. This is because the centrifugal force can reach dozens of times or even more than the gravity, so centrifugal separation has higher efficiency than gravity separation. In addition, the centrifugal separator also has a series of advantages such as small equipment size and footprint, easy installation, flexible operation, stable and continuous operation, no wearing parts, and convenient maintenance.

[0003] Gas-liquid cyclone separators based on the centrifugal separation principle are mostly typical tangential flow reversal flow patterns, such as Figure 1 It is a structural schematic diagram of a tangential flow reversal cyclone separator in the prior art, such as Figure 1 As shown, the air flow enters the separation equipment tangentially through the inlet of the cyclone separator, and forms a double vortex flow inside the cyclone separator. The outer cyclone mainly rotates downward near the cylinder wall, and the inner cyclone rotates upward in the center area of ​​the cylinder; the droplets are separated from the gas phase under the action of centrifugal force, and after moving to the side wall position, they are gathered and flow down along the side wall to the discharge port to be discharged from the separator; the purified gas enters the inner cyclone radially or reversely due to the radial pressure difference, and finally the gas is discharged from the equipment through the exhaust core tube at the top of the separator with the inner cyclone, thereby completing the two-phase separation of gas and liquid.

[0004] In addition, there are also axial flow ultra-short contact cyclone separators for gas-liquid cyclone separators, such as Figure 2 It is a structural schematic diagram of an axial flow ultra-short contact cyclone separator in the prior art, which is an axial flow reversal separator with a spiral guide blade structure. After the gas-liquid two-phase mixture enters the separator axially, it obtains initial kinetic energy of tangential rotation under the action of the guide blades, providing the centrifugal force required for separation of the gas-liquid two phases. The flow mode of the airflow in the separation space is consistent with that of the tangential flow reversal cyclone separator, and the airflow completes radial or reversal motion in the separation space.

[0005] As mentioned above, in actual applications of the existing tangential flow reversal cyclone separators and axial flow cyclone separators, on the one hand, the phenomenon of droplet entrainment in the airflow at the gas phase outlet is serious; on the other hand, a single separation device is difficult to meet the requirements of large processing volume within a better separation efficiency range, and in order to meet the requirements of large processing volume, the above-mentioned equipment usually adopts a parallel operation of multiple groups of separation equipment. However, after the multiple groups of separation equipment are combined in parallel, there is an uneven air intake distribution and obvious gas blowby between the separation equipment, which greatly reduces the separation efficiency after the parallel combination. Summary of the invention

[0006] In view of the deficiencies in the above-mentioned prior art, the present invention provides a gas-liquid separation device and a separation method. The gas-liquid separation device reduces the entrainment effect of the airflow on the droplets during the gas-liquid separation process, reduces the disturbance of the gas on the flow of the droplets, and thus improves the separation efficiency during the gas-liquid separation process.

[0007] In order to achieve the above object, the present invention provides a gas-liquid separation device, the gas-liquid separation device comprising:

[0008] An outer shell extending in a vertical direction, into which a gas-liquid mixture feed pipe arranged in the outer shell and sealedly connected thereto is inserted, and the outer shell and the gas-liquid mixture feed pipe are arranged concentrically;

[0009] An exhaust pipe is inserted into the gas-liquid mixture feed pipe and is sealedly connected thereto, wherein the gas-liquid mixture feed pipe is arranged concentrically with the exhaust pipe;

[0010] The gas-liquid mixture feed pipe is provided with a gas-liquid mixture feed port, the exhaust pipe is provided with an exhaust port, the gas-liquid mixture feed port and the exhaust port are located at the upper end of the outer shell, and the lower end of the outer shell is provided with a liquid discharge port;

[0011] Among them, a swirl mechanism for outputting the fluid in the feed pipe to the outer shell in a swirl flow manner is provided on the side wall of the gas-liquid mixture feed pipe, and a feed pipe sealing plate is provided at the lower end of the gas-liquid mixture feed pipe.

[0012] In some embodiments, an annular space is formed between the gas-liquid mixture feed pipe and the outer shell above the cyclone mechanism; the inner space of the outer shell below the exhaust pipe is a separation space; and the inner space of the outer shell below the separation space is a liquid collection area.

[0013] In some embodiments, the outer shell is provided with a reinforcing baffle in the separation space, the reinforcing baffle is located at the lower side of the outer shell, the reinforcing baffle is in a cone shape, and the top of the cone faces the drain port.

[0014] In some embodiments, the lower section of the gas-liquid mixture feed pipe is sealed and connected to a bell-mouth mechanism, and a bell-mouth rectifying plate is provided on the bell-mouth mechanism. The bell-mouth rectifying plate is located on the outer surface of the bell-mouth mechanism, and the bell-mouth rectifying plate is in the shape of an annular belt.

[0015] In some embodiments, the lower end of the exhaust pipe is a conical structure or a straight-cylindrical structure, and the height of the conical structure or the straight-cylindrical structure of the exhaust pipe is lower than the height of the bell-mouth structure.

[0016] In some of the embodiments, when the lower end of the exhaust pipe is a conical structure, a separation groove is opened through the wall of the conical structure, or a separation plate is provided on the inner wall of the conical structure; when the lower end of the exhaust pipe is a straight cylindrical structure, a separation groove is opened through the side wall of the lower end of the exhaust pipe.

[0017] In some embodiments, an exhaust pipe straightening plate is provided on the exhaust pipe, and the ratio of the axial spacing of the exhaust pipe straightening plate to the diameter of the exhaust pipe is 0.1-0.5.

[0018] In some of the embodiments, the cyclone mechanism is arranged with two inclination modes along the axial direction, namely, horizontal arrangement and downward inclination; the cyclone mechanism includes a cyclone arm group, which is a curved pipe connected to the side wall of the gas-liquid mixture feed pipe, and the direction of the end of the curved pipe is horizontal. The rotation angle of the fluid in the curved pipe around the central axis of the gas-liquid mixture feed pipe during the process of flowing from the curved pipe inlet to the curved pipe end is 0°-45°.

[0019] In some of the embodiments, the lower portion of the outer shell is a separation space conical structure, and the inclination angle of the separation space conical structure is greater than the inclination angle of the enhanced baffle by 3°-15°.

[0020] The present invention also provides a gas-liquid separation method, which uses the gas-liquid separation device as described above to perform gas-liquid separation. The gas-liquid separation method comprises the following steps:

[0021] The gas-liquid mixed fluid is input from the gas-liquid mixed feed port, and the fluid in the gas-liquid mixed feed pipe is output to the outer shell in a cyclonic flow through the cyclonic mechanism between the gas-liquid mixed feed pipe and the outer shell. The fluid flows downward in the outer shell in a cyclonic flow. After the gas-liquid two phases in the fluid enter the inner part of the outer shell, the gas-liquid separation is performed by the centrifugal separation principle.

[0022] The liquid droplets separated in the outer shell merge into a liquid flow and flow out from the lower end of the outer shell into the separation space. The liquid droplets and gas that have not merged into a liquid flow are subjected to the strong rotation effect of the enhanced baffle during the downward movement, and the centrifugal motion attenuation rate is slowed down. The liquid flow that has completed separation flows to the liquid collection area at the lower end of the outer shell to complete the separation, and finally the liquid is discharged from the separation device through the discharge port;

[0023] After the gas flows out of the cyclone mechanism along with the liquid, it first flows from top to bottom into the outer shell in a cyclone flow manner. The gas performs radial and reverse motion in the separation space, and then performs an upward internal cyclone motion in the central area of ​​the separation space, enters the exhaust pipe, and finally the gas is discharged from the separation device through the exhaust port.

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

[0025] The gas-liquid separation equipment provided by the present invention has a simple structure, no mechanical parts, a long service life, and is easy to install and maintain. Compared with other gas-liquid separation equipment that can achieve the same purpose, the gas-liquid separation equipment provided by the present invention has more advantages in structure and ease of operation. At the same time, the gas-liquid separation equipment reduces the entrainment effect of the airflow on the droplets during the gas-liquid separation process, reduces the disturbance of the gas on the droplet flow, and thereby improves the separation efficiency during the gas-liquid separation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a structural schematic diagram of a tangential flow reversal cyclone separator in the prior art;

[0028] Figure 2 It is a structural schematic diagram of an axial flow ultra-short contact cyclone separator in the prior art;

[0029] Figure 3 The structure of the gas-liquid separation device shown in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 4 The structure of the gas-liquid separation device shown in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 5 The structure of the gas-liquid separation device shown in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0032] Figure 6 The structure of the gas-liquid separation device shown in the embodiment of the present invention is shown in FIG. Figure 4 ;

[0033] Figure 7 It is a structural schematic diagram of a cyclone mechanism shown in an embodiment of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the bell-mouth rectifier plate on the outer surface of the bell-mouth mechanism shown in an embodiment of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of a separation plate on a conical mechanism shown in an embodiment of the present invention;

[0036] Fig.10 It is a schematic diagram of the structure of the separation groove penetrating the wall surface of the conical mechanism shown in an embodiment of the present invention;

[0037] in:

[0038] 1-outer shell; 11-drain port; 12-enhanced baffle; 13-separation space conical structure;

[0039] 2-gas-liquid mixture feed pipe; 21-gas-liquid mixture feed port;

[0040] 3-exhaust pipe; 31-exhaust port; 32-conical mechanism; 321-separation groove;

[0041] 322-separation plate; 33-straight cylinder mechanism; 34-exhaust pipe straightening plate;

[0042] 4-swirl mechanism; 41-swirl arm group;

[0043] 5- Feed pipe plugging plate;

[0044] 6-Annular space;

[0045] 7-Separation space;

[0046] 8-Liquid collection area;

[0047] 9- bell mouth mechanism;

[0048] 91-Bell mouth rectifier plate. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0050] Certain words are used in the specification and subsequent claims to refer to specific components or parts. It should be understood by those skilled in the art that technical users or manufacturers may use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "comprising" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect typical connection means. Indirect typical connection means include connection through other devices.

[0051] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and "about", or "approximately", "substantially", "left and right" and the like indicating directions or positional relationships or parameters are all based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the referred device or element must have a specific direction, specific size, or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] See also Figure 3 An embodiment of the present invention provides a gas-liquid separation device, which includes: an outer shell 1 extending in a vertical direction, the outer shell 1 is a straight cylinder, and is gradually reduced from top to bottom; a gas-liquid mixture feed pipe 2 inserted into and sealed with the outer shell 1, the outer shell 1 and the gas-liquid mixture feed pipe 2 are arranged concentrically; an exhaust pipe 3 inserted into and sealed with the gas-liquid mixture feed pipe 2, the gas-liquid mixture feed pipe 2 and the exhaust pipe 3 are arranged concentrically; a gas-liquid mixture feed port 21 is provided on the gas-liquid mixture feed pipe 2, and an exhaust port 31 is provided on the exhaust pipe 3, the gas-liquid mixture feed port 21 and the exhaust port 31 are located at the upper end of the outer shell 1, and a liquid discharge port 11 is provided at the lower end of the outer shell 1; in this embodiment, the gas-liquid mixture feed pipe 2 is used for feeding the gas-liquid mixture, the exhaust pipe 3 is used for discharging the gas formed after separation, and the liquid discharge port 11 is located at the lowest point of the bottom of the outer shell 1, which is used to discharge the liquid formed after separation.

[0053] Among them, a swirl mechanism 4 for outputting the fluid in the feed pipe to the outer shell 1 in a swirl flow manner is provided on the side wall of the gas-liquid mixture feed pipe 2, and a feed pipe sealing plate 5 is provided at the lower end of the gas-liquid mixture feed pipe 2.

[0054] In this embodiment, the gas-liquid mixture feed pipe 2 is inserted into the outer shell 1 and is connected thereto. The gas-liquid mixture feed pipe 2 is inserted from the top of the outer shell 1 to the middle thereof. The gas-liquid mixture feed pipe 2 can be roughly located on the axis of the outer shell 1. The gas-liquid mixture feed pipe 2 is used to transport the fluid to the cyclone mechanism 4, and the cyclone mechanism 4 outputs the fluid into the outer shell 1.

[0055] In this embodiment, the cross-section of the outer shell 1 is circular, the cross-section of the gas-liquid mixture feed pipe 2 is circular, the cross-section of the exhaust pipe 3 is circular, the ratio of the diameter of the gas-liquid mixture feed pipe to the diameter of the outer shell is between 0.2-0.6, and the ratio of the diameter of the exhaust pipe to the diameter of the gas-liquid mixture feed pipe is in the range of 0.4-0.9; when the diameter D of the outer shell is 0.5m-8.0m, the average gas velocity of the cross-section of the gas-liquid mixture feed pipe is 10m / s-20m / s.

[0056] In this embodiment, an annular space 6 is formed between the gas-liquid mixture feed pipe 2 and the outer shell 1 above the cyclone mechanism 4; the internal space of the outer shell 1 below the exhaust pipe 3 is a separation space 7; and the internal space of the outer shell 1 below the separation space 7 is a liquid collection area 8.

[0057] In this embodiment, the outer shell 1 is provided with a reinforcing baffle 12 in the separation space 7. The reinforcing baffle 12 is located at the lower side of the outer shell 1. The reinforcing baffle 12 is conical in shape, and the top of the cone faces the drain port.

[0058] In the gas-liquid separation equipment provided in this embodiment, the gas-liquid mixture performs an external swirling flow motion near the wall surface and an internal swirling flow motion in the central area. This is an inherent characteristic of the flow field. After the downward rotational motion, the gas-liquid mixture will reverse into an upward internal swirling flow motion. This is the flow path of the gas-liquid mixture. During the flow of the gas-liquid mixture along this path, the centrifugal effect will gradually decay. Therefore, an enhanced baffle is arranged in the lower part of the separation space to reduce the decay of the centrifugal effect and maintain the intensity of the centrifugal motion.

[0059] In this embodiment, the lower section of the gas-liquid mixture feed pipe is sealed and connected to the bell mouth mechanism 9 (see Figure 8), the bell-mouth mechanism 9 is provided with a bell-mouth rectifier plate 91, the bell-mouth rectifier plate 91 is located on the outer surface of the bell-mouth mechanism 9, and the bell-mouth rectifier plate 91 is in the shape of an annular belt. In this embodiment, the expansion angle of the bell-mouth mechanism is in the range of 5°-40°, the ratio of the length of the bell-mouth mechanism to the diameter of the gas-liquid mixture feed pipe is in the range of 0.8-3, the ratio of the length of the bell-mouth mechanism to the average diameter of the bell-mouth mechanism is in the range of 1-3, the bell-mouth rectifier plates are evenly arranged on the outer surface of the bell-mouth mechanism, the ratio of the outer diameter of the bell-mouth rectifier plates to the diameter of the bell-mouth mechanism is in the range of 1.05-1.3, and the ratio of the axial spacing of the bell-mouth rectifier plates to the average diameter of the bell-mouth mechanism is in the range of 0.1-0.5. In this embodiment, the bell-mouth rectifier plates arranged on the bell-mouth mechanism are arranged horizontally to reduce the axial vortex, strengthen the circumferential swirl effect, and improve the separation efficiency.

[0060] After the gas-liquid mixture is discharged from the cyclone mechanism, the gas and liquid droplets perform a cyclone motion, which is affected by various factors such as the rising airflow and presents a dispersed state. The liquid droplets are easily carried upward out of the separator by the secondary flow, thereby reducing the separation efficiency. In this embodiment, a bell-mouth mechanism is arranged at the lower part of the feed pipe sealing plate to enhance the rotational flow of the gas-liquid mixture, reduce the influence of the secondary flow on the rising internal cyclone, and prevent the liquid droplets in the secondary flow from being drawn into the rising internal cyclone. At the same time, a bell-mouth rectifier plate is arranged on the outer side of the bell-mouth mechanism to reduce the axial rotation effect of the secondary flow, reduce the total pressure drop of the separation device, enhance the circumferential rotational motion of the gas-liquid mixture, and improve the separation efficiency.

[0061] In this embodiment, the lower end of the exhaust pipe 3 is a conical structure 32 (see Figure 3 ) or straight cylindrical mechanism 33 (see Figure 4 ), the height of the conical structure 32 or the straight cylindrical structure 33 of the exhaust pipe 3 is lower than the height of the bell-mouth structure. In this embodiment, the necking angle of the conical structure at the lower end of the exhaust pipe 3 is in the range of 5°-40°; in this embodiment, the exhaust pipe 3 is arranged in the internal vortex rising path to lead out the separated gas to reduce the influence on the droplet flow field, and the conical structure is arranged at the lower part of the exhaust pipe 3 to improve the separation efficiency.

[0062] In some embodiments of the present invention, see Fig. 9 and Fig.10, wherein when the lower end of the exhaust pipe 3 is a conical structure 32, a separation groove 321 is provided through the wall of the conical structure, or a separation plate 322 is provided on the inner wall of the conical structure; the lower part of the exhaust pipe 3 is a conical structure 32, which is used to reduce the entrainment of droplets by the airflow and improve the separation efficiency; the necking angle of the conical structure is within the range of 5°-40°; the separation plate 322 or the separation groove 321 can achieve secondary separation and improve the gas-liquid separation efficiency. wherein when the lower end of the exhaust pipe is a straight cylindrical structure 33, a separation groove 321 is provided through the side wall of the lower end of the exhaust pipe 3 to achieve secondary separation and improve the separation efficiency.

[0063] In this embodiment, a separation plate 322 or a separation groove 321 is provided at the lower end of the exhaust pipe to achieve secondary separation at the entrance of the exhaust pipe 3, and finally achieve an excellent separation effect. The gas-liquid separation device disclosed in the embodiment of the present invention has a simple structure and no mechanical parts, a long service life, and is easy to install and maintain. Compared with other gas-liquid separation devices that can achieve the same purpose, the gas-liquid separation device provided in the embodiment of the present invention has more advantages in structure and simplicity of operation.

[0064] See also Figure 5 In this embodiment, the exhaust pipe 3 is provided with an exhaust pipe rectifying plate 34, the ratio of the outer diameter of the exhaust pipe rectifying plate 34 to the diameter of the exhaust pipe 3 is in the range of 1.3-2.5, and the ratio of the axial spacing of the exhaust pipe rectifying plate 34 to the diameter of the exhaust pipe 3 is 0.1-0.5.

[0065] In this embodiment, the swirl mechanism 4 is arranged in two axially inclined modes, namely, horizontal arrangement and downward inclination. When the swirl mechanism 4 is tilted downward, the axial inclination angle of the swirl mechanism 4 is 0°-20°, so that the swirl fluid can flow downward easily. Figure 7 The swirl mechanism 4 includes a swirl arm group 41, which is a curved pipe connected to the side wall of the gas-liquid mixture feed pipe, and the end of the curved pipe is oriented horizontally, so that the fluid output from the curved pipe can swirl in the outer shell 3 to avoid excessive impact with the wall of the outer shell 3 and cause loss of fluid velocity. The rotation angle of the fluid in the curved pipe around the central axis of the gas-liquid mixture feed pipe during the process of flowing from the curved pipe inlet to the curved pipe end is 0°-45°.

[0066] See also Figure 6 In this embodiment, the lower part of the outer shell 1 is a separation space conical structure 13, which cooperates with the enhanced baffle 12 to strengthen the rotation separation effect and improve the separation efficiency; the inclination angle of the separation space conical structure 13 is greater than the inclination angle of the enhanced baffle by 3°-15°.

[0067] In the above, the cross section of the outer shell in the embodiment of the present invention is circular, and the cross section of the gas-liquid mixture feed pipe is circular. In a feasible embodiment, the diameter of the outer shell is expressed as D, the ratio of the diameter of the gas-liquid mixture feed pipe to the diameter of the outer shell is between 0.2-0.6, the ratio of the diameter of the exhaust pipe to the diameter of the gas-liquid mixture feed pipe is in the range of 0.4-0.9, the expansion angle of the bell-mouth mechanism is in the range of 5°-40°, the ratio of the length of the bell-mouth mechanism to the diameter of the gas-liquid mixture feed pipe is in the range of 0.8-3, the ratio of the length of the bell-mouth mechanism to the average diameter of the bell-mouth mechanism is in the range of 1-3, and the necking angle of the conical mechanism at the lower end of the exhaust pipe is in the range of 5°-40°. When the diameter D of the outer shell is 0.5m-8.0m, the average gas velocity of the cross section of the gas-liquid mixture feed pipe is 10m / s-20m / s. Through simulation calculation, it is found that when the parameters of the various components of the gas-liquid separation device provided in the embodiment of the present invention are in the above range, the gas-liquid separation device can be kept in a better separation efficiency range.

[0068] Another embodiment of the present invention provides a gas-liquid separation method, which uses the gas-liquid separation device as described above to perform gas-liquid separation. The gas-liquid separation method includes the following steps:

[0069] The gas-liquid mixed fluid is input from the gas-liquid mixed feed port, and the fluid in the gas-liquid mixed feed pipe is output to the outer shell in a cyclonic flow through the cyclonic mechanism between the gas-liquid mixed feed pipe and the outer shell. The fluid flows downward in the outer shell in a cyclonic flow. After the gas-liquid two phases in the fluid enter the inner part of the outer shell, the gas-liquid separation is performed by the centrifugal separation principle.

[0070] The liquid droplets separated in the outer shell merge into a liquid flow and flow out from the lower end of the outer shell into the separation space. The liquid droplets and gas that have not merged into a liquid flow are subjected to the strong rotation effect of the enhanced baffle during the downward movement, and the centrifugal motion attenuation rate is slowed down. The liquid flow that has completed separation flows to the liquid collection area at the lower end of the outer shell to complete the separation, and finally the liquid is discharged from the separation device through the discharge port;

[0071] After the gas flows out from the cyclone mechanism with the liquid, it first flows from top to bottom into the outer shell in a cyclone flow manner. Due to the low density of the gas itself, the gas performs radial and reverse motion in the separation space, and then performs an upward internal cyclone motion in the central area of ​​the separation space, enters the exhaust pipe, and can be discharged into the conical mechanism at the lower end of the exhaust pipe. Finally, the gas is discharged from the separation device through the exhaust port.

[0072] As described above, the bell-mouth mechanism in the gas-liquid separation equipment provided by the present invention can enhance the centrifugal separation effect of gas-liquid and reduce the entrainment effect of short-circuit flow on droplets; after the gas-liquid mixture obtains centrifugal force in the rotating mechanism, it performs centrifugal separation movement in the outer shell. The setting of the bell-mouth mechanism reduces the cross-sectional area of ​​droplet flow, enhances the rotational movement of the gas-liquid mixture in the annular area between the bell-mouth mechanism and the outer shell, and reduces the diffusion of droplets toward the center due to the existence of secondary flow.

[0073] The concentric arrangement of the exhaust pipe and the gas-liquid mixture feed pipe in the gas-liquid separation equipment provided by the present invention, the gas is discharged from the separator according to the flow path, which can effectively reduce the pressure drop, the gas-liquid mixture in the separation equipment is centrifugal in the outer shell, the droplets move near the wall of the outer shell due to their high density, forming a downward external vortex, and the gas forms an upward internal vortex in the central area due to its low density. The setting of the central exhaust pipe allows the gas in the upward internal vortex to be discharged from the exhaust pipe, and the conical structure of the exhaust pipe, the separation plate provided on the lower inner wall of the exhaust pipe, and the separation groove provided through the lower wall of the exhaust pipe are all to effectively reduce the entrainment of the gas to the tiny droplets and improve the separation efficiency. At the same time, the setting of the bell mouth mechanism prevents the airflow from entraining the tiny droplets and directly flowing into the exhaust pipe, thereby improving the separation efficiency. The gas-liquid separation equipment provided by the present invention has a simple structure, no mechanical parts, a long service life, and is easy to install and maintain. Compared with other gas-liquid separation equipment that can achieve the same purpose, the gas-liquid separation equipment provided by the present invention has more advantages in structure and simplicity of operation.

[0074] In the gas-liquid separation equipment provided by the present invention, due to the arrangement of the enhanced baffle on the inner wall of the outer shell, the rotation intensity of the outward rotating airflow can be effectively enhanced, the centrifugal effect can be improved, the gas-liquid separation can be strengthened, and the separation efficiency can be increased. During the downward rotation of the gas-liquid mixture, due to the friction of the wall, the rotation intensity will gradually decrease with the decrease in height. The enhanced baffle is arranged on the inner side of the outer shell, which can strengthen the centrifugal effect and improve the separation efficiency.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A gas-liquid separation device, characterized in that: The gas-liquid separation equipment comprises: An outer shell extending in a vertical direction, into which a gas-liquid mixture feed pipe arranged in the outer shell and sealedly connected thereto is inserted, and the outer shell and the gas-liquid mixture feed pipe are arranged concentrically; An exhaust pipe is inserted into the gas-liquid mixture feed pipe and is sealedly connected thereto, wherein the gas-liquid mixture feed pipe is arranged concentrically with the exhaust pipe; The gas-liquid mixture feed pipe is provided with a gas-liquid mixture feed port, the exhaust pipe is provided with an exhaust port, the gas-liquid mixture feed port and the exhaust port are located at the upper end of the outer shell, and the lower end of the outer shell is provided with a liquid discharge port; Among them, a swirl mechanism for outputting the fluid in the feed pipe to the outer shell in a swirl flow manner is provided on the side wall of the gas-liquid mixture feed pipe, and a feed pipe sealing plate is provided at the lower end of the gas-liquid mixture feed pipe.

2. The gas-liquid separation device according to claim 1, characterized in that: An annular space is formed between the gas-liquid mixture feed pipe and the outer shell above the cyclone mechanism; the inner space of the outer shell below the exhaust pipe is a separation space; The inner space of the outer shell below the separation space is a liquid collection area.

3. The gas-liquid separation device according to claim 2, characterized in that: The outer shell is provided with a reinforcing baffle in the separation space. The reinforcing baffle is located at the lower side of the outer shell. The reinforcing baffle is in a cone shape, and the top of the cone faces the liquid discharge port.

4. The gas-liquid separation device according to claim 1, characterized in that: The lower section of the gas-liquid mixture feed pipe is sealed and connected to a bell-mouth mechanism, and a bell-mouth rectifying plate is provided on the bell-mouth mechanism. The bell-mouth rectifying plate is located on the outer surface of the bell-mouth mechanism, and the bell-mouth rectifying plate is in the shape of an annular belt.

5. The gas-liquid separation device according to claim 4, characterized in that: The lower end of the exhaust pipe is a conical structure or a straight-cylindrical structure, and the height of the conical structure or the straight-cylindrical structure of the exhaust pipe is lower than the height of the bell-mouth structure.

6. The gas-liquid separation device according to claim 5, characterized in that: When the lower end of the exhaust pipe is a conical structure, a separation groove is opened through the wall of the conical structure, or a separation plate is provided on the inner wall of the conical structure; when the lower end of the exhaust pipe is a straight cylindrical structure, a separation groove is opened through the side wall of the lower end of the exhaust pipe.

7. The gas-liquid separation device according to claim 1, characterized in that: The exhaust pipe is provided with an exhaust pipe rectifying plate, and the ratio of the axial spacing of the exhaust pipe rectifying plate to the diameter of the exhaust pipe is 0.1-0.

5.

8. The gas-liquid separation device according to claim 1, characterized in that: The swirl mechanism is arranged with two inclination modes along the axial direction, namely, horizontal arrangement and downward inclination; the swirl mechanism comprises a swirl arm group, which is a curved pipe connected to the side wall of the gas-liquid mixture feed pipe, and the direction of the end of the curved pipe is horizontal. The rotation angle of the fluid in the curved pipe around the central axis of the gas-liquid mixture feed pipe during the process of flowing from the curved pipe inlet to the curved pipe end is 0°-45°.

9. The gas-liquid separation device according to claim 3, characterized in that: The lower part of the outer shell is a separation space conical structure, and the inclination angle of the separation space conical structure is greater than the inclination angle of the enhanced baffle by 3°-15°.

10. A gas-liquid separation method, using the gas-liquid separation device according to any one of claims 1 to 9 to perform gas-liquid separation, characterized in that: The gas-liquid separation method comprises the following steps: The gas-liquid mixed fluid is input from the gas-liquid mixed feed port, and the fluid in the gas-liquid mixed feed pipe is output to the outer shell in a cyclonic flow through the cyclonic mechanism between the gas-liquid mixed feed pipe and the outer shell. The fluid flows downward in the outer shell in a cyclonic flow. After the gas-liquid two phases in the fluid enter the inner part of the outer shell, the gas-liquid separation is performed by the centrifugal separation principle. The liquid droplets separated in the outer shell merge into a liquid flow and flow out from the lower end of the outer shell into the separation space. The liquid droplets and gas that have not merged into a liquid flow are subjected to the strong rotation effect of the enhanced baffle during the downward movement, and the centrifugal motion attenuation rate is slowed down. The liquid flow that has completed separation flows to the liquid collection area at the lower end of the outer shell to complete the separation, and finally the liquid is discharged from the separation device through the discharge port; After the gas flows out of the cyclone mechanism along with the liquid, it first flows from top to bottom into the outer shell in a cyclone flow manner. The gas performs radial and reverse motion in the separation space, and then performs an upward internal cyclone motion in the central area of ​​the separation space, enters the exhaust pipe, and finally the gas is discharged from the separation device through the exhaust port.

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