Multistage separation gas purification plant

Abstract

The application discloses a kind of multistage separation gas purification equipment, it relates to gas purification equipment technical field, including centrifugal separation mechanism, filtering mechanism, and outer shell, the centrifugal separation mechanism includes separation shell, the filtering mechanism includes filter shell, the filter shell is set in the upper portion of the separation shell, the outer shell is set on the separation shell and the filter shell;The separation shell and the filter shell are filled with filter material, and a plurality of first flow gaps are formed on the separation shell in contact with the filter material, a plurality of second flow gaps are formed on the filter shell in contact with the filter material, the gas in the separation shell can flow into the filter material through the first flow gap, and flow out of the filter shell through the second flow gap, so that impurities are absorbed by the filter material.The multistage separation gas purification equipment provided by the application can efficiently clean gas, remove impurities in the gas, and the overall structure is compact.

Description

Multi-stage separation gas purification equipment Technical Field

[0001] This invention relates to the field of gas purification equipment technology, and in particular to a multi-stage separation gas purification device. Background Technology

[0002] Heterogeneous gas purification technology is widely used in human life and industrial production. As industry standards and production processes tighten their requirements for the content of relevant gas components, and as new materials and technologies emerge, the requirements for gas purification equipment are constantly increasing.

[0003] Natural gas extracted during oil and gas production contains certain components of liquid impurities such as water and heavy hydrocarbons, as well as harmful elements like sulfur and chlorine. If these impurities are not removed to below acceptable levels, they can negatively impact subsequent gas processing. For example, impurities can scale and clog valves and pipelines; they can form highly corrosive acids upon contact with water, corroding equipment and creating safety hazards; and toxic impurities can reduce product purity. Furthermore, the presence of non-gaseous impurities reduces the transport capacity of the target product, leading to increased transportation energy consumption and operating costs. In nuclear energy utilization, ensuring high-quality steam enters the turbine is crucial. Liquid water in high-temperature steam can corrode the turbine and must be completely removed before it enters the turbine; otherwise, it will significantly affect the turbine's energy conversion efficiency. Additionally, production processes in refining, thermal power, and building materials industries generate large quantities of complex waste gases, which must be strictly discharged according to standards to ensure good air quality.

[0004] Cyclone separators offer advantages such as low pressure drop, simple structure, and good separation effect, making them widely used in gas-liquid separation processes. However, due to their reliance on inertial separation, they suffer from problems such as small droplet and / or dust entrainment in practical applications, failing to meet increasingly stringent process requirements. Therefore, cyclone separators are typically used as primary coarse separators, followed by multiple stages of separators and dryers in series. This results in numerous gas processing devices, complex processes, and large footprints. Especially in confined spaces such as offshore platforms, gas purification equipment must be highly efficient and energy-saving while maintaining the compactness of related process equipment. The performance of widely used demisters, such as corrugated plate demisters and wire mesh demisters, is limited by parameters such as gas velocity and impurity particle size, resulting in limited operational flexibility.

[0005] Patent CN216677698U discloses a porous jet scrubbing tower. Its working principle is as follows: the gas to be treated is introduced into a gas distribution unit through an inlet pipe. This unit distributes the gas into different gas pipes. The outlet of each gas pipe is below the surface of the washing solution and has multiple vents. The gas flowing out of the vents is divided into multiple paths, fully contacts the washing solution, overflows from the surface, and is discharged from the exhaust pipe to the next unit. This patent uses wet scrubbing to remove solid and gaseous impurities from the gas. The gas distribution unit, branch pipes, and porous connectors increase the contact area between the gas and the washing solution. However, the waste liquid generated during gas purification is difficult to treat, increasing the operating cost of gas purification. When the gas flow rate is high and the temperature is high, the washing solution may be carried out of the equipment, making it unsuitable for applications requiring high humidity.

[0006] US Patent 20220163245A1 discloses a novel gas-liquid separation device, including a cylinder, external interfaces, an adapter, and a gas-liquid separation assembly. The cylinder has a first chamber, a second chamber, and a third chamber, and the external interfaces include a first interface, a second interface, and a third interface, enabling two operating states: one inlet and one outlet, or one inlet and two outlets. This patent allows for flexible adjustment of its operating state according to the requirements of different working environments. However, this device has many moving parts, making it unable to operate stably under harsh conditions such as high particulate matter content, resulting in problems such as high operational difficulty and high maintenance costs.

[0007] Patent US10830431B2 discloses a two-stage steam / water separator, primarily used in direct-flow steam generator systems in the nuclear power industry. Steam enters the first separation space tangentially, where it undergoes first-stage steam / water separation through swirling action. Water is separated and collects at the bottom of the container, then exits the separator through a drain outlet. The steam separated in the first stage rises through a riser, passes through a herringbone corrugated plate demister, and exits the separator, completing the second-stage steam / water separation. This patent uses a swirling cylinder and corrugated plates connected in series to achieve gas-liquid separation. Centrifugal separation can separate particles as small as 20 μm. Although a corrugated demister is subsequently installed, the separation efficiency is low, failing to address the entrainment of small droplets and / or dust. Furthermore, this demister has stringent requirements on gas flow rate and a narrow operating range. Summary of the Invention

[0008] The purpose of this invention is to provide a multi-stage separation gas purification device that can efficiently purify gases, remove gaseous impurities and liquid and / or solid particles (such as droplets and / or dust), and has a compact overall structure.

[0009] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0010] This invention provides a multi-stage separation gas purification device for purifying gas containing gaseous impurities and liquid and / or solid particles, wherein the liquid and / or solid particles include at least droplets and / or dust. The device includes a centrifugal separation mechanism, a filtration mechanism, and an outer shell. The centrifugal separation mechanism includes a separation shell, the filtration mechanism includes a filtration shell, the filtration shell is sleeved on the upper part of the separation shell, and the outer shell is sleeved on the separation shell and the filtration shell.

[0011] The separation shell and the filter shell are filled with filter media. Multiple first flow gaps are formed on the separation shell that is in contact with the filter media, and multiple second flow gaps are formed on the filter shell that is in contact with the filter media. The gas in the separation shell can flow into the filter media through the first flow gaps and flow out of the filter shell through the second flow gaps, so that at least part of the impurities are absorbed by the filter media.

[0012] In a preferred embodiment, the centrifugal separation mechanism further includes:

[0013] An air inlet pipe extends into the separation housing from the lower end of the separation housing, and the gas flows into the separation housing through the air inlet pipe;

[0014] A swirling generator is disposed inside the intake pipe, and the swirling generator is used to cause the gas flowing through the intake pipe to generate swirling motion;

[0015] A vortex stabilizing cone is disposed at the upper end of the separation shell, and the vortex stabilizing cone is used to maintain the stability of the upper swirling flow of the gas inside the separation shell;

[0016] Wherein, at least a portion of the droplets and / or dust in the gas can move to the inner wall of the separation shell under the centrifugal force of the swirling motion.

[0017] In a preferred embodiment, the centrifugal separation mechanism includes:

[0018] A flow-diverting cylinder is disposed inside the separation shell. Multiple flow-guiding grooves are formed on the side wall of the flow-diverting cylinder, and the multiple flow-guiding grooves are evenly distributed along the axial direction of the flow-diverting cylinder.

[0019] An air inlet pipe extends from the lower end of the separation housing into the baffle cylinder, through which the gas flows into the baffle cylinder;

[0020] A swirling generator is disposed inside the intake pipe, and the swirling generator is used to cause the gas flowing through the intake pipe to generate swirling motion;

[0021] A vortex stabilizing cone is disposed at the upper end of the separation shell, and the vortex stabilizing cone is used to maintain the stability of the upper swirling flow of the gas inside the separation shell;

[0022] Wherein, at least a portion of the droplets and / or dust in the gas can move to the inner wall of the baffle under the centrifugal force of the swirling motion, and the droplets and / or dust on the inner wall of the baffle can flow to the outer wall of the baffle through the guide groove.

[0023] In a preferred embodiment, the lower end of the baffle cylinder extends downward to form a flow guide portion, which is arranged radially outward from top to bottom, so that droplets and / or dust on the outer wall of the baffle cylinder flow downward along the flow guide portion.

[0024] In a preferred embodiment, the upper end of the flow-blocking cylinder extends and is connected to the upper end surface of the separation shell, and the vortex stabilizing cone is located inside the flow-blocking cylinder;

[0025] The centrifugal separation mechanism further includes:

[0026] The lower swirl groove is disposed in the upper part of the baffle cylinder. The lower swirl groove is used to generate a reverse downward swirling motion of the gas, so that the gas flows between the baffle cylinder and the separation shell, and the gas is evenly distributed axially between the baffle cylinder and the separation shell.

[0027] In a preferred embodiment, there are multiple separation shells, which are evenly distributed circumferentially, and the filter shell is simultaneously fitted over the upper part of the multiple separation shells;

[0028] The centrifugal separation mechanism further includes:

[0029] The main intake pipe extends from the upper end to form multiple intake branch pipes, each of which is connected to the main intake pipe. The multiple intake branch pipes extend from the lower end of the multiple separation housings into the multiple separation housings respectively, and the gas flows into the separation housing through the main intake pipe and the intake branch pipes.

[0030] Multiple swirling generators are correspondingly installed in multiple intake manifolds, and the swirling generators are used to cause the gas flowing through the intake manifolds to generate swirling motion;

[0031] Multiple vortex stabilizers are correspondingly disposed at the upper ends of multiple separation shells, and the vortex stabilizers are used to maintain the stability of the upper swirling flow of the gas inside the separation shell;

[0032] In this process, at least a portion of the droplets and / or dust particles in the gas can move to the inner wall of the separation shell under the centrifugal force of the swirling state.

[0033] In a preferred embodiment, the lower end of the separation shell extends downward to form a first droplet / dust outlet, which is radially recessed from top to bottom. The droplets and / or dust on the inner wall of the separation shell can flow downward under the action of gravity and flow out of the separation shell through the first droplet / dust outlet.

[0034] In a preferred embodiment, the upper end of the filter housing extends to the outside of the outer shell and forms a feed port, and the lower end of the filter housing extends to the outside of the outer shell and forms a discharge port. The used filter material can flow out of the filter housing through the discharge port, and the replacement filter material can flow into the filter housing through the feed port.

[0035] In a preferred embodiment, the upper end of the filter housing extends to the outside of the outer shell and forms a storage cavity, in which the filter material can flow into the filter housing under the action of gravity; the lower end of the filter housing extends to the outside of the outer shell and forms a discharge port.

[0036] The filtration mechanism also includes:

[0037] The feeding pipeline is connected at one end to the discharge port and at the other end to the storage cavity;

[0038] A regenerator is installed on the feed line, and the regenerator is used to clean and regenerate the used filter media;

[0039] A conveyor is installed on the feeding pipeline;

[0040] The filter media can enter the feeding pipeline through the discharge port. The conveyor is used to drive the filter media in the feeding pipeline so that the filter media passes through the regenerator and is cleaned and regenerated. The cleaned filter media can flow into the storage cavity under the drive of the conveyor.

[0041] In a preferred embodiment, a gas outlet is formed at the upper end of the outer casing, and a second droplet / dust outlet is formed at the lower end of the outer casing, wherein the second droplet / dust outlet is radially recessed from top to bottom;

[0042] The gas can pass through the separation shell and the filter shell into the outer shell, and flow out of the outer shell through the gas outlet. At least some of the droplets and / or dust move to the inner wall of the outer shell under the action of the gas flow. The droplets and / or dust on the inner wall of the outer shell can settle under the action of gravity and flow out of the outer shell through the second droplet / dust outlet.

[0043] The features and advantages of this invention are:

[0044] The multi-stage gas purification device provided by this invention includes a centrifugal separation mechanism that separates liquid droplets and / or dust in the gas using centrifugal force, a filtration separation structure that separates liquid droplets and / or dust and gaseous impurities in the gas using filtration, and an outer shell that further separates liquid droplets and / or dust in the gas using gravity settling. Gas flows through these three structures sequentially, thereby achieving a multi-stage, highly efficient gas purification effect. Furthermore, the three structures are coaxially coupled, resulting in faster gas transfer speeds, higher purification efficiency, and a compact overall structure, effectively improving the device's versatility, simplifying operation, and reducing maintenance costs. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 shows a schematic diagram of the overall structure of the first embodiment of the multi-stage separation gas purification device of the present invention.

[0047] Figure 2 shows a schematic diagram of the specific structure of the multi-stage separation gas purification device of the present invention at point A in Figure 1.

[0048] Figure 3 shows a schematic diagram of the overall structure of a second embodiment of the multi-stage separation gas purification device of the present invention.

[0049] Figure 4 shows a schematic diagram of the airflow in the multi-stage separation gas purification device of the present invention.

[0050] Figure 5 shows a schematic diagram of the overall structure of the third embodiment of the multi-stage separation gas purification device of the present invention.

[0051] Figure 6 shows a schematic diagram of the overall structure of the fourth embodiment of the multi-stage separation gas purification device of the present invention.

[0052] Figure 7 shows a top view of the cross section at point A-A in Figure 6 of the multi-stage separation gas purification device of the present invention.

[0053] Figure 8 shows a schematic diagram of the main inlet pipe and the branch inlet pipes of the multi-stage separation gas purification device of the present invention. Detailed Implementation

[0054] 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. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "installed," "connected," and "connected" should be interpreted broadly. For example, it can be a mechanical connection or an electrical connection, or it can be a connection within two elements. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0055] Please refer to Figures 1 and 2. This embodiment of the invention provides a multi-stage separation gas purification device for purifying gas containing gaseous impurities and liquid and / or solid particles. The liquid and / or solid particles include at least droplets and / or dust. The multi-stage separation gas purification device includes a centrifugal separation mechanism 1, a filtration mechanism 2, and an outer shell 3. The centrifugal separation mechanism 1 includes a separation shell 11, and the filtration mechanism 2 includes a filter shell 21. The filter shell 21 is fitted onto the upper part of the separation shell 11, and the outer shell 3 is fitted onto the separation shell 11 and the filter shell 21. Filter media 4 is filled between the separation shell 11 and the filter shell 21. Multiple first flow gaps 111 are formed on the separation shell 11 in contact with the filter media 4, and multiple second flow gaps 211 are formed on the filter shell 21 in contact with the filter media 4. Gas inside the separation shell 11 can flow into the filter media 4 through the first flow gaps 111 and out of the filter shell 21 through the second flow gaps 211, so that at least some of the impurities are absorbed by the filter media 4. Specifically, the second flow gap 211 can be a mesh structure or a slotted structure, and the porosity of the second flow gap 211 is preferably 17% to 46%.

[0056] The following further describes the specific structure and connection relationships of the multi-stage separation gas purification device according to an embodiment of the present invention:

[0057] In a preferred embodiment, the centrifugal separation mechanism 1 further includes: an inlet pipe 12 extending into the separation housing 11 from its lower end, through which gas flows into the separation housing 11; a vortex generator 13 disposed within the inlet pipe 12, used to generate vortex motion in the gas flowing through the inlet pipe 12; and a vortex stabilizing cone 14 disposed at the upper end of the separation housing 11, used to maintain the stability of the upper vortex motion of the gas within the separation housing 11; wherein at least a portion of the droplets and / or dust particles in the gas can move to the inner wall of the separation housing 11 under the centrifugal force of the vortex motion. The vortex stabilizing cone 14 prevents vortex oscillation of the gas within the separation housing 11. Specifically, the swirling generator 13 mainly includes a swirler and a beam tube. The swirler has guide vanes to make the airflow form a strong swirling flow. The exit angle of the guide vanes is preferably 15° to 35°. The function of the beam tube is to maintain the swirling intensity of the gas, which is conducive to the centrifugal separation of subsequent liquid and / or solid particles, such as droplets and / or dust. The length of the beam tube depends on the size of the particulate impurities (such as droplets and / or dust) in the gas. When the median particle size of the impurities is greater than 20 μm, the height of the beam tube is preferably 1d to 3d, where d is the diameter of the beam tube; when the median particle size of the impurities is less than 10 μm, the height of the beam tube is preferably 2d to 6d.

[0058] Referring to Figure 3, in a preferred embodiment, the centrifugal separation mechanism 1 includes: a baffle cylinder 15 disposed within the separation housing 11, wherein a plurality of flow channels 151 are formed on the side wall of the baffle cylinder 15, and the plurality of flow channels 151 are evenly distributed along the axial direction of the baffle cylinder 15; an air inlet pipe 12 extending from the lower end of the separation housing 11 into the baffle cylinder 15, through which gas flows into the baffle cylinder 15; and a vortex generator 13 disposed within the air inlet pipe 12, which generates vortexes. The generator 13 is used to generate a swirling motion of the gas flowing through the intake pipe 12; the vortex stabilizer 14 is disposed at the upper end of the separation housing 11, and the vortex stabilizer 14 is used to maintain the stability of the upper swirling motion of the gas in the separation housing 11; wherein, at least part of the droplets and / or dust in the gas can move to the inner wall of the baffle cylinder 15 under the centrifugal action of the swirling motion, and the droplets and / or dust on the inner wall of the baffle cylinder 15 can flow to the outer wall of the baffle cylinder 15 through the guide groove 151. Specifically, the swirling generator 13 mainly includes a swirler and a beam tube. The swirler has guide vanes to create a strong swirling flow. The exit angle of the guide vanes is preferably 15° to 35°. The beam tube maintains the swirling intensity of the gas, facilitating the centrifugal separation of subsequent impurities, such as liquids and / or solid particles, like droplets and / or dust. The length of the beam tube depends on the size of the particulate impurities (such as droplets and / or dust) in the gas. When the median particle size of the impurities is greater than 20 μm, the height of the beam tube is preferably 1d to 3d, where d is the diameter of the beam tube. When the median particle size of the impurities is less than 10 μm, the height of the beam tube is preferably 2d to 6d. The baffle cylinder 15 is coaxially arranged with the separation shell 11. The diameter of the baffle cylinder 15 is preferably 1.2d to 1.8d, and the overlap height between the baffle cylinder 15 and the separation shell 11 is preferably 1d to 2d. The height of the baffle cylinder 15 is preferably 6d to 10d. The flow channel 151 can be mainly set in the middle of the baffle cylinder 15 so that the droplets and / or dust particles agglomerates formed on the inner wall of the baffle cylinder 15 can be timely drawn out of the high-speed upward gas swirling zone, reducing the particle entrainment phenomenon. The width of the flow channel 151 is preferably 0.1d to 0.3d.

[0059] In a preferred embodiment, a flow guide 152 extends downward from the lower end of the baffle cylinder 15. The flow guide 152 is arranged radially outward from top to bottom, so that the liquid droplets and / or dust accumulated on the outer wall of the baffle cylinder 15 flow along the flow guide 152 to the inner wall of the separation shell 11. The angle between the flow guide 152 at the bottom of the baffle cylinder 15 and the central axis of the separation shell 11 is preferably 30° to 50°, and the height is preferably 0.3d to 0.5d. Specifically, the gas flow path inside and outside the baffle cylinder 15 is shown in Figure 4.

[0060] Referring to Figure 5, in a preferred embodiment, the upper end of the baffle cylinder 15 extends and connects to the upper end face of the separation shell 11, and the stabilizing vortex cone 14 is located inside the baffle cylinder 15. The centrifugal separation mechanism 1 further includes a lower swirling groove 16, which is disposed in the upper part of the baffle cylinder 15. The lower swirling groove 16 is used to generate a reverse downward swirling flow of gas, so that the gas flows evenly between the baffle cylinder 15 and the separation shell 11 through the lower swirling groove 16. The lower swirling groove 16 disposed in the upper part of the baffle cylinder 15 can convert the upward swirling gas into a reverse swirling flow and a downward swirling flow, which is beneficial to improve the uniformity of subsequent gas flow and realize the swirling self-cleaning of the inner wall surface of the separation shell 11.

[0061] Please refer to Figures 6 to 8. In a preferred embodiment, there are multiple separation housings 11, which are evenly distributed circumferentially. A filter housing 21 is simultaneously fitted over the upper part of the multiple separation housings 11. The centrifugal separation mechanism 1 further includes: a main air inlet pipe 12a, with multiple branch air inlet pipes 12b extending from its upper end. Each branch air inlet pipe 12b is connected to the main air inlet pipe 12a. The branch air inlet pipes 12b extend from the lower end of each separation housing 11 into the housing, and gas passes through the main air inlet pipe. Pipe 12a and intake manifold 12b flow into the separation housing 11; multiple swirling generators 13 are correspondingly arranged in the multiple intake manifolds 12b, and the swirling generators 13 are used to generate swirling motion of the gas flowing through the intake manifolds 12b; multiple stabilizing cones 14 are correspondingly arranged at the upper end of the multiple separation housings 11, and the stabilizing cones 14 are used to maintain the stability of the upper swirling motion of the gas in the separation housing 11; wherein, at least a portion of the droplets and / or dust in the gas can move to the inner wall of the separation housing 11 under the centrifugal force of the swirling motion. Specifically, the number of separation housings 11 is preferably 4 to 12.

[0062] In a preferred embodiment, the lower end of the separation housing 11 extends downward to form a first droplet / dust outlet 112. The first droplet / dust outlet 112 is radially recessed from top to bottom. The droplets and / or dust on the inner wall of the separation housing 11 can flow downward under the action of gravity and flow out of the separation housing 11 through the first droplet / dust outlet 112.

[0063] Please refer to Figure 1. In a preferred embodiment, the upper end of the filter housing 21 extends to the outside of the outer shell 3 and forms a feed port 212. The lower end of the filter housing 21 extends to the outside of the outer shell 3 and forms a discharge port 213. The used filter material 4 can flow out of the filter housing 21 through the discharge port 213, and the replacement filter material 4 can flow into the filter housing 21 through the feed port 212.

[0064] Please refer to Figure 6. In a preferred embodiment, the upper end of the filter housing 21 extends to the outside of the outer shell 3 and forms a storage cavity 214. The filter material 4 in the storage cavity 214 can flow into the filter housing 21 under the action of gravity. The lower end of the filter housing 21 extends to the outside of the outer shell 3 and forms a discharge port 213. The filter mechanism 2 also includes: a feeding pipe 22, one end of which is connected to the discharge port 213 and the other end is connected to the storage cavity 214; a regenerator 23, which is disposed on the feeding pipe 22 and is used to clean and regenerate the used filter material 4; and a conveyor 24, which is disposed on the feeding pipe 22. The filter material 4 can enter the feeding pipe 22 through the discharge port 213. The conveyor 24 is used to drive the filter material 4 in the feeding pipe 22 so that the filter material 4 passes through the regenerator 23 and is cleaned and regenerated. The cleaned and regenerated filter material 4 can flow into the storage cavity 214 under the drive of the conveyor 24.

[0065] Please refer to Figure 1. In a preferred embodiment, a gas outlet 31 is formed at the upper end of the outer casing 3, and a second droplet / dust outlet 32 ​​is formed at the lower end of the outer casing 3. The second droplet / dust outlet 32 ​​is radially recessed from top to bottom. Gas can pass through the separation shell 11 and the filter shell 21 into the outer casing 3 and flow out of the outer casing 3 through the gas outlet 31. At least some of the droplets and / or dust move downward under the action of gravity and flow out of the outer casing 3 through the second droplet / dust outlet 32.

[0066] Based on the above method description, the multi-stage separation gas purification device of the present invention has the following beneficial effects:

[0067] The multi-stage gas purification device provided in this invention comprises a centrifugal separation mechanism 1 that separates droplets and / or dust within the gas using centrifugal force, a filtration separation structure that separates droplets and / or dust and impurities within the gas using filtration, and an outer shell 3 that further separates droplets and / or dust within the gas using gravity settling. Gas flows sequentially through these three structures, thereby achieving a multi-stage, highly efficient gas purification effect. Furthermore, the three structures are coaxially coupled, resulting in faster gas transfer speeds, higher purification efficiency, and a compact overall structure, effectively improving the device's versatility, simplifying operation, and reducing maintenance costs.

[0068] The above are merely embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A multi-stage separation gas purification device for purifying a gas containing gaseous impurities and liquid and / or solid particulate matter, wherein the liquid comprises at least droplets and the solid particulate matter comprises at least dust, characterized in that, The multi-stage gas purification equipment includes a centrifugal separation mechanism, a filtration mechanism, and an outer shell. The centrifugal separation mechanism includes a separation shell, and the filtration mechanism includes a filter shell. The filter shell is sleeved on the upper part of the separation shell, and the outer shell is sleeved on the separation shell and the filter shell. Filter media is filled between the separation shell and the filter shell. Multiple first flow gaps are formed on the separation shell in contact with the filter media, and multiple second flow gaps are formed on the filter shell in contact with the filter media. The gas inside the separation shell can flow into the filter media through the first flow gaps and out of the filter shell through the second flow gaps, so that at least some of the impurities are absorbed by the filter media. The centrifugal separation mechanism includes a flow divider, disposed on the separation shell. Within the housing, multiple flow-guiding grooves are formed on the side wall of the baffle cylinder, and these grooves are evenly distributed along the axial direction of the baffle cylinder. An inlet pipe extends from the lower end of the separation housing into the baffle cylinder, through which the gas flows into the baffle cylinder. A vortex generator is disposed within the inlet pipe, used to generate vortex motion in the gas flowing through the inlet pipe. A vortex stabilizing cone is disposed at the upper end of the separation housing, used to maintain the stability of the upper vortex of the gas within the separation housing. At least a portion of the droplets and / or dust particles within the gas can move to the inner wall of the baffle cylinder under the centrifugal force of the vortex motion, and the droplets and / or dust particles on the inner wall of the baffle cylinder can flow to the outer wall of the baffle cylinder through the flow-guiding grooves.

2. The multi-stage gas purification device as described in claim 1, characterized in that, The centrifugal separation mechanism further includes: an air inlet pipe extending into the separation housing from the lower end, through which the gas flows into the separation housing; a vortex generator disposed within the air inlet pipe, which causes the gas flowing through the air inlet pipe to generate a vortex motion; and a vortex stabilizing cone disposed at the upper end of the separation housing, which stabilizes the upper vortex of the gas within the separation housing; wherein at least a portion of the droplets and / or dust particles within the gas can move to the inner wall of the separation housing under the centrifugal force of the vortex motion.

3. The multi-stage gas purification device as described in claim 1, characterized in that, The lower end of the baffle cylinder extends downward to form a flow guide section, which is arranged radially outward from top to bottom so that droplets and / or dust on the outer wall of the baffle cylinder flow downward along the flow guide section.

4. The multi-stage separation gas purification device as described in claim 1, characterized in that, The upper end of the baffle cylinder extends and connects to the upper end face of the separation shell, and the vortex stabilizer is located inside the baffle cylinder; the centrifugal separation mechanism further includes: a lower swirling groove, which is disposed in the upper part of the baffle cylinder, and the lower swirling groove is used to make the gas generate a reverse downward swirling motion, so that the gas flows between the baffle cylinder and the separation shell, and makes the gas uniformly distributed axially between the baffle cylinder and the separation shell.

5. The multi-stage gas purification device as described in claim 1, characterized in that, The number of separation shells is multiple, and the multiple separation shells are evenly distributed along the circumference. The filter shell is simultaneously sleeved on the upper part of the multiple separation shells. The centrifugal separation mechanism further includes: a main inlet pipe with multiple inlet branch pipes extending from its upper end, all of which are connected to the main inlet pipe and extend from the lower end of the separation housings into the separation housings respectively, through which the gas flows into the separation housings; multiple vortex generators, correspondingly disposed within the multiple inlet branch pipes, which are used to generate vortex motion in the gas flowing through the inlet branch pipes; and multiple vortex stabilizing cones, correspondingly disposed at the upper end of the multiple separation housings, which are used to maintain the stability of the upper vortex of the gas in the separation housings; wherein at least a portion of the droplets and / or dust in the gas can move to the inner wall of the separation housing under the centrifugal action of the vortex state.

6. The multi-stage gas purification device as described in claim 2, 3, or 5, characterized in that, The lower end of the separation shell extends downward to form a first droplet / dust outlet. The first droplet / dust outlet is radially recessed from top to bottom. The droplets and / or dust on the inner wall of the separation shell can flow downward under the action of gravity and flow out of the separation shell through the first droplet / dust outlet.

7. The multi-stage gas purification device as described in claim 1, characterized in that, The upper end of the filter housing extends to the outside of the outer shell and forms a feeding port. The lower end of the filter housing extends to the outside of the outer shell and forms a discharge port. The used filter material can flow out of the filter housing through the discharge port, and the replacement filter material can flow into the filter housing through the feeding port.

8. The multi-stage gas purification device as described in claim 1, characterized in that, The upper end of the filter housing extends to the outside of the outer shell and forms a storage cavity. The filter media in the storage cavity can flow into the filter housing under the action of gravity. The lower end of the filter housing extends to the outside of the outer shell and forms a discharge port. The filtration mechanism also includes: a feeding pipe, one end of which is connected to the discharge port and the other end of which is connected to the storage cavity; a regenerator, which is disposed on the feeding pipe and is used to clean and regenerate the used filter media; and a conveyor, which is disposed on the feeding pipe. The filter media can enter the feeding pipe through the discharge port. The conveyor is used to drive the filter media in the feeding pipe so that the filter media passes through the regenerator and is cleaned and regenerated. The cleaned filter media can flow into the storage cavity under the drive of the conveyor.

9. The multi-stage gas purification device as described in claim 1, characterized in that, A gas outlet is formed at the upper end of the outer casing, and a second droplet / dust outlet is formed at the lower end of the outer casing. The second droplet / dust outlet is radially recessed from top to bottom. The gas can pass through the separation shell and the filter shell into the outer casing and flow out of the outer casing through the gas outlet. At least some of the droplets and / or dust move to the inner wall of the outer casing under the action of the gas flow. The droplets and / or dust on the inner wall of the outer casing can settle under the action of gravity and flow out of the outer casing through the second droplet / dust outlet.

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