An environmentally friendly petrochemical tail gas separation and treatment equipment

Abstract

This invention relates to the technical field of special equipment for air pollution environmental protection, and proposes an environmentally friendly petrochemical tail gas separation and treatment device. The device includes a shell, with a cyclone pre-separation chamber, a composite filtration chamber, and a fine filtration discharge chamber sequentially arranged from bottom to top along the airflow direction via partitions. A tail gas inlet pipe is fixedly connected to the bottom side wall of the shell, and a clean gas discharge pipe is fixedly connected to the top side wall. A cyclone guiding mechanism is installed in the cyclone pre-separation chamber; a condensation mechanism is fixed on the outer wall of the shell corresponding to the cyclone pre-separation chamber; a cylindrical filter element assembly is installed in the composite filtration chamber; and a pulse backflushing assembly is fixed on the top cover, with an electric heating mechanism fixed on the top cover to cooperate with the pulse backflushing assembly. This technical solution solves the problems of existing petrochemical tail gas treatment equipment having a single separation and purification stage, easy filter element clogging, and inconvenient maintenance and replacement, especially the backflushing structure easily interfering with filter element disassembly and assembly, affecting the continuous and stable operation of the equipment.

Description

Technical Field

[0001] This invention relates to the technical field of special equipment for air pollution environmental protection, specifically to an environmentally friendly separation and treatment device for petrochemical exhaust gas. Background Technology

[0002] The petrochemical industry continuously generates tail gases containing dust particles, oil mist, condensable organic vapors, and volatile organic compounds during production processes such as catalytic cracking, hydrocracking, delayed coking, and storage and transportation. These tail gases are complex in composition, exhibit significant temperature fluctuations, and often possess characteristics of both particulate and organic pollution. Direct emission without effective treatment can easily cause air pollution and negatively impact the surrounding environment and equipment safety. Existing tail gas purification equipment typically employs single-treatment methods such as cyclone separation, single-stage filter cartridges, or end-of-pipe adsorption. While these methods can reduce the concentration of some pollutants to a certain extent, they are poorly suited for petrochemical tail gases containing droplets, particles, and organic components. Problems often arise, including insufficient pre-stage separation, excessive load on subsequent filtration stages, and premature failure of adsorption units.

[0003] Furthermore, most filter elements in existing exhaust gas treatment equipment are fixedly installed. After long-term operation, they are prone to clogging due to dust accumulation, oil mist adhesion, and condensate buildup, leading to a rapid increase in filtration resistance and affecting system stability. Although some equipment is equipped with a backflushing cleaning structure, the backflushing nozzle is usually fixed inside or above the filter element. This can easily cause structural interference during filter element replacement or maintenance, resulting in cumbersome maintenance and prolonged downtime. At the same time, for the combined clogging problem of oily and condensate pollutants in petrochemical exhaust gas, existing structures often lack heating cleaning methods to coordinate with the backflushing process, making it difficult to balance filtration efficiency, online regeneration capability, and ease of subsequent maintenance.

[0004] Therefore, it is necessary to propose an environmentally friendly petrochemical tail gas separation and treatment equipment with high structural integration, suitable for multi-stage separation and purification, easy maintenance and replacement, and capable of hot backflushing regeneration. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides an environmentally friendly petrochemical tail gas separation and treatment device, which solves the problems of existing petrochemical tail gas treatment equipment having a single separation and purification process, easy clogging of filter elements and inconvenient maintenance and replacement, especially the backflushing structure that easily interferes with the disassembly and assembly of filter elements, affecting the continuous and stable operation of the equipment.

[0006] According to one aspect, at least one embodiment of the present invention provides an environmentally friendly petrochemical tail gas separation and treatment device, comprising: The housing has an inner cavity that, along the airflow direction, is sequentially provided from bottom to top with a cyclone pre-separation chamber, a composite filtration chamber, and a fine filtration discharge chamber via a partition. The bottom side wall of the housing is fixedly connected to the exhaust gas inlet pipe corresponding to the position of the cyclone pre-separation chamber. The exhaust gas inlet pipe is arranged along the tangential direction of the housing. The top side wall of the housing is fixedly connected to the clean gas discharge pipe corresponding to the position of the fine filtration discharge chamber. The top wall of the housing is fixed with a top cover by bolts. A swirling guide mechanism is installed on the inner wall of the swirling pre-separation chamber. The bottom of the swirling pre-separation chamber is tapered, and a drain pipe with a valve is fixedly connected to the bottom end of the swirling pre-separation chamber. A condensation mechanism is fixed to the outer wall of the housing at a position corresponding to the swirling pre-separation chamber, and the horizontal height of the condensation mechanism is higher than that of the exhaust gas inlet pipe; A cylindrical filter element assembly is installed inside the composite filtration chamber. The cylindrical filter element assembly is fixed between two partitions by a quick-release mechanism. An inspection door is installed on the housing corresponding to the position of the composite filtration chamber. A fine filter assembly is installed inside the fine filter discharge chamber, and the horizontal height of the fine filter assembly is lower than that of the clean air discharge pipe; A pulse backflush assembly is fixed on the top cover, and the bottom of the pulse backflush assembly extends into the cylindrical filter element assembly. An electric heating mechanism that cooperates with the pulse backflush assembly is fixed on the top cover.

[0007] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, the swirling guide mechanism is a spiral guide vane, and the spiral guide vane is distributed at equal intervals along the circumferential direction of the inner wall of the shell.

[0008] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, the condensation mechanism includes an outer sleeve forming an annular cooling cavity with the outer wall of the shell, and a spiral cooling coil disposed in the annular cooling cavity. The inlet end of the spiral cooling coil is connected to an external cooling water supply pipe, and the outlet end of the spiral cooling coil is connected to an external cooling water return pipe.

[0009] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided by at least one embodiment of the present invention, the cylindrical filter element assembly includes a mounting base, an outer cylinder body is fixed to the outer side of the bottom end of the mounting base, an inner cylinder body coaxially arranged with the outer cylinder body is fixed to the center of the bottom end of the mounting base, a plurality of symmetrically arranged ultrasonic oscillation elements are embedded in the bottom wall of the mounting base, and an air outlet communicating with the inner cavity of the inner cylinder body is opened through the top wall of the mounting base. The outer cylinder is a sintered metal filter mesh layer; The inner cylinder is a pleated nanofiber filter material layer, and a threaded base is fixed at the bottom of the inner cylinder. A dust collection seat is screwed to the bottom end of the threaded base; The outer edge of the dust collection seat abuts against the bottom wall of the outer cylinder, and a dust collection box is fixed to the outside of the dust collection seat; The dust collection box is fitted onto the outside of the outer cylinder; The ultrasonic oscillation element is located between the outer cylinder and the inner cylinder.

[0010] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, a plurality of arc-shaped through slots are symmetrically opened on the bottom partition plate, and an exhaust slot is opened through the center of the upper partition plate.

[0011] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, two sets of quick-release mechanisms are provided. The two sets of quick-release mechanisms are respectively installed on the side walls of two partitions that are close to each other. The quick-release mechanism includes an arc-shaped fixing block, which is fixed on the partition. An arc-shaped deflection block is rotatably installed on one side of the arc-shaped fixing block through a hinge, and the other side of the arc-shaped fixing block is connected to the arc-shaped deflection block through a buckle.

[0012] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, the fine filter assembly includes a base plate, the base plate is fixed between the inner walls of the fine filter discharge chamber, a central cylinder is fixed at the center of the base plate, activated carbon modules are symmetrically installed on the top wall of the base plate, and fan-shaped through grooves are symmetrically opened on the base plate.

[0013] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided by at least one embodiment of the present invention, the pulse backflushing assembly includes an electric push rod fixed at the center of the top wall of the top cover, the bottom movable end of the electric push rod slides through the top cover and is fixed with a connecting seat, and a piston plate is fixed on the outer wall of the bottom movable end of the electric push rod. The bottom end of the connecting seat is fixed with a pulse backflush nozzle, and the top wall of the connecting seat is fixed with an air guide pipe that communicates with the inner cavity of the pulse backflush nozzle. The piston plate is slidably mounted inside the central cylinder.

[0014] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided by at least one embodiment of the present invention, the electric heating mechanism includes a housing, the housing is fixed on the top wall of the top cover, a heater is fixed on the side wall of the housing, a spiral heating tube that cooperates with the heater is fixed on the inner wall of the housing, an air inlet pipe is fixedly connected to one side of the top wall of the housing, and an air outlet pipe is fixedly connected to the side of the housing away from the heater. The intake pipe is connected to an external compressed air source via a pipeline; The bottom end of the air outlet pipe extends into the central cylinder, and the air outlet pipe is connected to the air guide pipe through a connecting hose.

[0015] For example, in an environmentally friendly petrochemical tail gas separation and treatment device provided in at least one embodiment of the present invention, the housing is provided with an intelligent differential pressure adaptive control system, including: a first pressure sensor disposed on the inlet side of the composite filter chamber, a second pressure sensor disposed on the outlet side of the composite filter chamber, a gas flow sensor disposed at the tail gas inlet pipe, and a controller disposed on the outer wall of the housing. The controller is electrically connected to the first pressure sensor, the second pressure sensor, the gas flow sensor, the ultrasonic oscillation element, and the pulse valve of the external compressed gas source.

[0016] The beneficial effects of the embodiments of the present invention are as follows: 1. In this invention, a cyclone pre-separation chamber, a composite filtration chamber, and a fine filtration discharge chamber are sequentially arranged from bottom to top within the housing, along with spiral guide vanes, a condensation mechanism, a cylindrical filter element assembly, and a fine filtration assembly. This allows petrochemical tail gas to sequentially undergo cyclone separation, condensation, double-layer filtration, and end-of-pipe adsorption treatment. This structure can simultaneously remove droplets, particulate matter, and organic pollutants, reducing the load on subsequent filtration units and improving overall purification efficiency and treatment stability. Furthermore, by incorporating a double-layer filtration structure with an outer and inner cylinder within the cylindrical filter element assembly, and arranging an ultrasonic oscillation element between them, the stripping effect on deposited pollutants is enhanced, which helps maintain the long-term permeability of the filter element assembly.

[0017] 2. In this invention, a pulse backflushing assembly with an electrically driven push rod is installed on the top cover, in conjunction with an electric heating mechanism. This allows the pulse backflushing nozzle to extend into the cylindrical filter element assembly for backflushing cleaning under normal conditions, and to move upwards to avoid obstruction during maintenance, thus providing space for the disassembly and assembly of the filter element assembly. This structure ensures the effectiveness of backflushing cleaning while avoiding structural interference from the nozzle during filter element replacement. Combined with a quick-release mechanism and inspection door, it significantly improves maintenance convenience and shortens downtime for maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0019] Figure 1 This is a perspective view of the external structure of the present invention; Figure 2 This is a three-dimensional half-section view of the present invention; Figure 3 This is a perspective view of the cylindrical filter element assembly and quick-release mechanism in the separated state of the present invention; Figure 4 This is a three-dimensional half-sectional view of the cylindrical filter element assembly of the present invention; Figure 5 This is a three-dimensional view of the fine filtration component structure in this invention; Figure 6 This is a three-dimensional view of the pulse backflush assembly structure in this invention; Figure 7 This is a three-dimensional view of the electric heating mechanism in this invention; In the diagram: 1. Shell; 2. Partition; 3. Cyclone pre-separation chamber; 4. Composite filtration chamber; 5. Fine filtration discharge chamber; 6. Exhaust gas inlet pipe; 7. Drain pipe; 8. Spiral guide vane; 9. Condensation mechanism; 91. Outer sleeve; 92. Spiral cooling coil; 10. Inspection door; 11. Cylindrical filter element assembly; 111. Mounting base; 112. Outer cylinder; 113. Inner cylinder; 114. Threaded base; 115. Dust collection seat; 116. Dust collection box; 117. Ultrasonic oscillation element; 12. Quick release mechanism; 121. Arc-shaped fixing block; 122. Arc-shaped deflection block; 123. Buckle; 13. Fine filtration assembly; 131. Base plate; 132. Central cylinder; 133. Activated carbon module; 14. Top cover; 15. Clean air discharge pipe; 16. Pulse backflushing assembly; 161. Electric push rod; 162. Connecting seat; 163. Pulse backflushing nozzle; 164. Piston plate; 165. Air guide pipe; 17. Electric heating mechanism; 171. Outer shell; 172. Heater; 173. Spiral heating tube; 174. Air inlet pipe; 175. Air outlet pipe; 18. Controller; 19. Arc-shaped through groove; 20. Exhaust groove; 21. Air outlet; 22. Fan-shaped through groove; 23. Connecting hose. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Example 1

[0027] See Figures 1 to 7 This embodiment provides an environmentally friendly petrochemical tail gas separation and treatment device, including a shell 1. The shell 1 is generally arranged in a vertical cylindrical structure and is preferably made of a corrosion-resistant metal material, such as 304 stainless steel or 316L stainless steel. The inner cavity of the shell 1 is divided from bottom to top along the airflow direction by two partitions 2 to form a swirl pre-separation chamber 3, a composite filtration chamber 4, and a fine filtration discharge chamber 5.

[0028] The bottom sidewall of the shell 1 is fixedly connected to the exhaust gas inlet pipe 6 at the position corresponding to the swirl pre-separation chamber 3. The exhaust gas inlet pipe 6 is set along the tangential direction of the shell 1. By setting the exhaust gas inlet pipe 6 to a tangential air intake form, the petrochemical exhaust gas entering the swirl pre-separation chamber 3 can obtain an initial velocity of circumferential rotation in the initial stage of entry, providing the basic flow field conditions for subsequent swirl pre-separation.

[0029] A clean gas discharge pipe 15 is fixedly connected to the top and side walls of the housing 1 at the position corresponding to the fine filter discharge chamber 5, which is used to discharge the exhaust gas after multi-stage purification. A top cover 14 is fixed to the top wall of the housing 1 by bolts. The top cover 14 is detachable to facilitate the installation and maintenance of the pulse backflushing assembly 16 and the electric heating mechanism 17, and also to facilitate the maintenance of related components in the fine filter discharge chamber 5.

[0030] The inner wall of the swirling pre-separation chamber 3 is equipped with a swirling guide mechanism. In this embodiment, the swirling guide mechanism is preferably a spiral guide vane 8. Combined with... Figure 2 As shown, multiple spiral guide vanes 8 are evenly distributed circumferentially along the inner wall of the shell 1. After the spiral guide vanes 8 are fixed to the inner wall of the swirling pre-separation chamber 3, their spiral guiding surfaces extend continuously along the upward direction of the exhaust gas, further guiding the tangentially entering exhaust gas to form a stable spiral upward swirling flow on the basis of its original rotational motion. With this configuration, larger-diameter droplets, oil mist, and particulate matter in the exhaust gas are more easily thrown towards the inner wall of the shell 1 under the action of centrifugal force and converge downward along the inner wall.

[0031] The bottom of the cyclone pre-separation chamber 3 is conical, and a drain pipe 7 with a valve is fixedly connected to its bottom end. Because the bottom of the cyclone chamber is conical, the separated droplets, condensate, and heavier particles naturally converge towards the center of the bottom and are discharged through the drain pipe 7. This structure helps reduce the liquid and particle loads of the subsequent composite filtration chamber 4.

[0032] A condensation mechanism 9 is fixedly installed on the outer wall of the shell 1 at the position corresponding to the swirl pre-separation chamber 3, and the horizontal height of the condensation mechanism 9 is higher than that of the exhaust gas inlet pipe 6. With this configuration, the high-temperature petrochemical exhaust gas entering the swirl pre-separation chamber 3 gradually comes into contact with the shell wall section cooled by the condensation mechanism 9 during the spiral upward flow process, causing some of the condensable components to condense and precipitate in the cavity area above the air inlet position, thus avoiding the formation of a large amount of condensate at the air inlet and affecting the initial swirl stability.

[0033] In this embodiment, the condensation mechanism 9 includes an outer sleeve 91 forming an annular cooling cavity with the outer wall of the housing 1, and a spiral cooling coil 92 disposed within the annular cooling cavity. Figure 2 As shown, the inlet end of the spiral cooling coil 92 is connected to an external cooling water supply pipe, and its outlet end is connected to an external cooling water return pipe. Cooling water circulates within the spiral cooling coil 92, transferring cooling energy to the annular cooling area between the outer sleeve 91 and the outer wall of the shell 1, thereby reducing the temperature of the corresponding shell wall surface. Preferably, the spiral cooling coil 92 is continuously coiled along the axial direction of the swirling pre-separation chamber 3 to improve the heat exchange area and condensation stability.

[0034] A cylindrical filter element assembly 11 is installed inside the composite filter chamber 4. The cylindrical filter element assembly 11 is fixed between two partitions 2 by a quick-release mechanism 12, and an inspection door 10 is installed on the housing 1 corresponding to the position of the composite filter chamber 4. The inspection door 10 can be a hinged door with a flange sealing structure, so that the cylindrical filter element assembly 11 can be taken out or installed from the side after opening.

[0035] Combination Figure 3 and Figure 4 As shown, the cartridge filter assembly 11 includes a mounting base 111, an outer cylinder 112 fixed to the outer side of the bottom end of the mounting base 111, and an inner cylinder 113 coaxially arranged with the outer cylinder 112 fixed to the center of the bottom end of the mounting base 111. An air outlet 21 communicating with the inner cavity of the inner cylinder 113 is provided through the top wall of the mounting base 111.

[0036] The outer cylinder 112 is a sintered metal filter layer, primarily used for primary interception filtration of the exhaust gas after cyclone pre-separation, preferentially intercepting relatively large residual particles and oil mist droplets. The inner cylinder 113 is a pleated nanofiber filter material layer, located inside the outer cylinder 112 and coaxially arranged with it, used for further fine filtration of the exhaust gas after passing through the outer cylinder 112, capturing even smaller fine particles. Because the inner cylinder 113 employs a pleated structure, a larger effective filtration area can be achieved within a limited component volume, which helps reduce filtration resistance and improve dust holding capacity.

[0037] The bottom wall of the mounting base 111 is embedded with several symmetrically arranged ultrasonic oscillation elements 117, which are located between the outer cylinder 112 and the inner cylinder 113. The ultrasonic oscillation elements 117 are positioned between the double-layer filter structure, which can, on the one hand, vibrate and loosen the dirt attached to the inside of the outer cylinder 112 or the outside of the inner cylinder 113, and on the other hand, cooperate with pulse backflushing to perform secondary peeling of deposits on the surface of the filter media, thereby reducing the risk of clogging.

[0038] A threaded base 114 is fixed to the bottom end of the inner cylinder 113, and a dust collection seat 115 is screwed to the bottom end of the threaded base 114. The outer edge of the dust collection seat 115 abuts against the bottom wall of the outer cylinder 112, and a dust collection box 116 is fixed to the outside of the dust collection seat 115, which is fitted onto the outside of the outer cylinder 112. This forms a settling dust collection area located below the double-cylinder structure. Dust, sludge, and agglomerated particles that have been stripped off by ultrasonic vibration and backflushing can move downwards along the internal structure of the component and eventually fall into the dust collection box 116, thereby achieving centralized collection of pollutants.

[0039] Several arc-shaped grooves 19 are symmetrically formed on the bottom partition 2, and an exhaust groove 20 is formed through the center of the upper partition 2. The arc-shaped grooves 19 cooperate with the outer peripheral air intake area of ​​the cylindrical filter element assembly 11, so that the exhaust gas from the swirl pre-separation chamber 3 can bypass the central closed area of ​​the lower partition 2 and enter the composite filtration chamber 4 from bottom to top and enter from the periphery of the cylindrical filter element assembly 11. The exhaust groove 20 at the center of the upper partition 2 is connected to the air outlet 21 at the top of the mounting base 111, so that the clean airflow after passing through the filter element assembly is collected and enters the fine filtration discharge chamber 5.

[0040] Two sets of quick-release mechanisms 12 are provided, and the two sets of quick-release mechanisms 12 are respectively installed on the side walls of the two partitions 2 that are close to each other. Figure 3 As shown, each quick-release mechanism 12 includes an arc-shaped fixing block 121, which is fixed to the corresponding partition 2. An arc-shaped deflecting block 122 is rotatably mounted on one side of the arc-shaped fixing block 121 via a hinge, and the other side of the arc-shaped fixing block 121 is connected to the arc-shaped deflecting block 122 via a latch 123. During installation, the arc-shaped fixing block 121 and the arc-shaped deflecting block 122 surround and limit the mounting base 111 and the corresponding connecting section. During disassembly, opening the latch 123 and flipping the arc-shaped deflecting block 122 releases the restriction on the cartridge filter assembly 11. This structure facilitates quick assembly and disassembly of the filter assembly, reducing maintenance workload.

[0041] A fine filter assembly 13 is installed inside the fine filter discharge chamber 5, and the horizontal height of the fine filter assembly 13 is lower than that of the clean air discharge pipe 15. Combined with... Figure 5 As shown, the fine filter assembly 13 includes a base plate 131, which is fixed between the inner walls of the fine filter discharge chamber 5. A central cylinder 132 is fixed at the center of the base plate 131. Activated carbon modules 133 are symmetrically installed on the top wall of the base plate 131, and fan-shaped channels 22 are symmetrically opened on the base plate 131. The airflow discharged from the cylindrical filter assembly 11 enters the lower part of the fine filter discharge chamber 5 through the exhaust channel 20, and then rises through the fan-shaped channels 22 to the area above the base plate 131, before flowing through the activated carbon modules 133. The activated carbon modules 133 can adsorb residual volatile organic compounds, odor components, and some trace pollutants in the exhaust gas, thereby improving the purification effect of the exhaust gas. In addition to providing structural support, the central cylinder 132 also provides space for the lifting and lowering of the moving parts in the pulse backflushing assembly 16.

[0042] The pulse backflushing assembly 16 is fixed to the top cover 14, and its bottom extends into the cylindrical filter element assembly 11. An electric heating mechanism 17, which cooperates with the pulse backflushing assembly 16, is fixed to the top cover 14. Figure 6As shown, the pulse backflush assembly 16 includes an electric actuator 161 fixed at the center of the top wall of the top cover 14. The movable end of the bottom of the electric actuator 161 slides through the top cover 14 and is fixed with a connecting seat 162. The bottom end of the connecting seat 162 is fixed with a pulse backflush nozzle 163, and the top wall of the connecting seat 162 is fixed with an air guide pipe 165 communicating with the inner cavity of the pulse backflush nozzle 163. A piston plate 164 is fixed to the outer wall of the movable end of the bottom of the electric actuator 161, and the piston plate 164 is slidably installed inside the central cylinder 132.

[0043] Under normal filtration conditions, the electric actuator 161 is in the extended state, positioning the pulse backflushing nozzle 163 within the cartridge filter assembly 11, allowing it to be aligned with the inner cavity of the inner cylinder 113. When backflushing is required, compressed gas can enter the pulse backflushing nozzle 163 via the air guide pipe 165, and then be ejected downwards or circumferentially from the nozzle, acting on the inner wall area of ​​the inner cylinder 113 to form a pulse backflushing airflow from the inside out, thereby removing dust deposits adhering to the inner cylinder 113 and the outer cylinder 112.

[0044] Furthermore, the purpose of the electric actuator 161 is to allow the connecting seat 162 and the pulse backflush nozzle 163 to move upward as a whole when the cartridge filter assembly 11 needs to be replaced or maintained. This allows the pulse backflush nozzle 163 to exit the internal space of the cartridge filter assembly 11, thus avoiding interference from the lateral removal of the cartridge filter assembly 11. After the filter assembly is reinstalled, the electric actuator 161 then moves the pulse backflush nozzle 163 back to its original position, allowing it to re-enter the cartridge filter assembly 11 and return to its working state. This structure balances the functional requirement of the nozzle penetrating deep into the filter element under normal backflush conditions with the requirement of easy removal and installation of the filter assembly during maintenance and replacement.

[0045] Combination Figure 7 As shown, the electric heating mechanism 17 includes a housing 171, which is fixed to the top wall of the top cover 14. A heater 172 is fixed to the side wall of the housing 171, and a spiral heating tube 173 that cooperates with the heater 172 is fixed to the inner wall of the housing 171. An air inlet pipe 174 is fixedly connected to one side of the top wall of the housing 171, and an air outlet pipe 175 is fixedly connected to the side of the housing 171 away from the heater 172. The air inlet pipe 174 is connected to an external compressed air source through a pipeline. The bottom end of the air outlet pipe 175 extends into the central cylinder 132, and the air outlet pipe 175 is connected to the air guide pipe 165 through a connecting hose 23. The compressed gas output from the external compressed air source enters the interior of the housing 171 through the air inlet pipe 174, flows in the spiral heating tube 173 and is heated by the heater 172, and then enters the pulse backflush nozzle 163 through the air outlet pipe 175, the connecting hose 23 and the air guide pipe 165. Therefore, the backflushing gas entering the filter element assembly can be a hot airflow, thereby enhancing the removal effect on oily dirt and condensed adhering substances.

[0046] The housing 1 is also equipped with an intelligent differential pressure adaptive control system, including a first pressure sensor located on the inlet side of the composite filter chamber 4, a second pressure sensor located on the outlet side of the composite filter chamber 4, a gas flow sensor located at the exhaust gas inlet pipe 6, and a controller 18 located on the outer wall of the housing 1. The controller 18 is electrically connected to the first pressure sensor, the second pressure sensor, the gas flow sensor, the ultrasonic oscillation element 117, and the pulse valve of the external compressed air source. This system can acquire the pressure difference across the filter element assembly and the exhaust gas flow information in real time, and automatically control the ultrasonic oscillation element 117 and the pulse valve according to the pressure difference change, so that the equipment can automatically perform backflushing regeneration when the filter element load increases.

[0047] The working process of this embodiment is as follows: The exhaust gas first enters the cyclone pre-separation chamber 3 tangentially through the exhaust gas inlet pipe 6, forming an enhanced cyclone under the guidance of the spiral guide vanes 8. Larger droplets, oil mist, and particles in the exhaust gas are thrown towards the chamber wall under centrifugal force, and some condensable components are condensed and precipitated in the shell wall area under the action of the condensation mechanism 9. The above-mentioned liquid phase and heavier impurities collect along the conical bottom and are discharged through the drain pipe 7. After preliminary separation, the exhaust gas enters the composite filter chamber 4 through the arc-shaped channel 19 on the lower partition plate 2, and enters the outer cylinder 112 through the outer periphery of the cylindrical filter element assembly 11. The exhaust gas first undergoes primary filtration in the outer cylinder 112, and then passes through the inner cylinder 113 for secondary fine filtration. The clean gas enters the fine filtration discharge chamber 5 through the outlet 21 and exhaust channel 20, and then ascends through the fan-shaped channel 22 to complete the terminal adsorption purification through the activated carbon module 133, and is finally discharged through the clean gas discharge pipe 15.

[0048] When the first pressure sensor and the second pressure sensor detect that the pressure difference across the composite filter chamber 4 has increased to a set threshold, the controller 18 activates the ultrasonic oscillation element 117 and controls the corresponding pulse valve of the external compressed air source to open. After being heated by the electric heating mechanism 17, the compressed gas enters the outlet pipe 175, the connecting hose 23, the air guide pipe 165, and the pulse backflush nozzle 163 in sequence, and is sprayed into the inner cylinder 113 to form a backflush airflow, causing the dust and oily adhering substances attached to the inner cylinder 113 and the outer cylinder 112 to fall off. The fallen substances collect downward into the dust collection box 116, thereby restoring the permeability of the cylindrical filter element assembly 11.

[0049] When the cartridge filter assembly 11 needs to be replaced, firstly, the controller 18 shuts off the pulse valve, heater 172, and ultrasonic oscillation element 117. After the equipment stops working, the electric push rod 161 is driven upward, causing the pulse backflush nozzle 163 to exit the inner cavity of the cartridge filter assembly 11. Then, the inspection door 10 is opened, the latches 123 of the upper and lower quick-release mechanisms 12 are released, and the arc-shaped deflector block 122 is flipped to release the restriction on the cartridge filter assembly 11. After that, the cartridge filter assembly 11 can be removed laterally from the inspection door 10 for maintenance or replacement. After the replacement is completed, the new cartridge filter assembly 11 is reset and the quick-release mechanism 12 is relocked. Then, the electric push rod 161 is driven downward, causing the pulse backflush nozzle 163 to re-enter the cartridge filter assembly 11, restoring normal operation.

[0050] Example 2

[0051] See Figures 1 to 7 Based on Example 1, this example further illustrates the coordinated assembly and disassembly process of the cartridge filter element assembly 11, the quick-release mechanism 12, and the pulse backflushing assembly 16. This example mainly illustrates the specific structural fit relationship of the present invention under filter element maintenance conditions.

[0052] In this embodiment, the overall structure of the housing 1, the cyclone pre-separation chamber 3, the composite filtration chamber 4, the fine filtration discharge chamber 5, the condensation mechanism 9, and the fine filtration assembly 13 is basically the same as that in Embodiment 1, and will not be described again. The difference is that this embodiment places greater emphasis on the spatial adaptation relationship between the cartridge filter assembly 11 and the pulse backflushing assembly 16, as well as the action logic during quick disassembly and maintenance.

[0053] like Figure 4 and Figure 6 As shown, the pulse backflush nozzle 163 is located in the middle of the inner cavity of the inner cylinder 113 under normal operating conditions. Since the inner cylinder 113 is a longitudinally extending filter element body, if the pulse backflush nozzle 163 remains fixed, when the inspection door 10 is opened and an attempt is made to pull out the cylindrical filter element assembly 11 from the side, the pulse backflush nozzle 163 will cause upper insertion interference with the mounting base 111 and the inner cylinder 113, making it impossible to remove the cylindrical filter element assembly 11 smoothly. Based on this, the present invention provides an electric push rod 161 on the top cover 14, and connects the connecting base 162, the pulse backflush nozzle 163, and the piston plate 164 as a whole to the movable end of the electric push rod 161.

[0054] In this structure, the central cylinder 132, in addition to forming part of the fine filter assembly 13, also serves as a guide sliding cavity for the piston plate 164. When the piston plate 164 slides up and down in the central cylinder 132, it can ensure the motion stability of the pulse backflushing nozzle 163 when the electric actuator 161 drives it to rise and fall, avoiding swaying and deflection. On the other hand, it can provide axial guidance for the downward end position of the pulse backflushing assembly 16, so that the pulse backflushing nozzle 163 can be stably aligned with the air outlet 21 on the top wall of the mounting base 111 and the central cavity of the inner cylinder 113 when it returns to the working position, while ensuring that the gas will not be discharged upward through the central cylinder 132.

[0055] In this embodiment, when the equipment is in normal filtration and backflushing operation, the electric push rod 161 extends to its lower position, the connecting seat 162 is located near the bottom of the top cover 14, the pulse backflushing nozzle 163 passes downward through the fine filtration discharge chamber 5 and extends into the cylindrical filter element assembly 11, and the air guide pipe 165 is connected to the output end of the electric heating mechanism 17 through the connecting hose 23. In this state, the pulse backflushing nozzle 163 can penetrate deep into the inner cylinder 113, forming a close-range backflushing on the inside of the filter element, which is beneficial to improving the efficiency of the backflushing airflow and ensuring the dust removal effect of the double-layer filter element structure.

[0056] When it is necessary to disassemble the cartridge filter assembly 11, the controller 18 first stops the external compressed air supply and shuts off the electric heating mechanism 17. Then, the electric actuator 161 retracts, causing the connecting seat 162, the pulse backflush nozzle 163, and the piston plate 164 to move upwards as a whole. Because the piston plate 164 slides within the central cylinder 132, the upward movement of the pulse backflush nozzle 163 is stably guided. Once the bottom end of the pulse backflush nozzle 163 is completely disengaged from the space above the inner cylinder 113, the top of the cartridge filter assembly 11 is no longer restricted by the axial positioning of the pulse backflush nozzle 163.

[0057] Next, the operator opens the inspection door 10 and releases the quick-release mechanisms 12 located on the upper and lower partitions 2 in sequence. Specifically, the latch 123 is opened first, and then the arc-shaped deflector block 122 is rotated around the hinge, so that the locking structure that originally held the outer periphery of the mounting base 111 together with the arc-shaped fixing block 121 is opened. After both sets of quick-release mechanisms 12 are released, the cylindrical filter element assembly 11 loses its circumferential limitation and axial pressure with the partition 2, and can be pulled out as a whole from one side of the inspection door 10. Since the pulse backflushing nozzle 163 has moved upward to avoid the gap under the action of the electric push rod 161, the mounting base 111, the outer cylinder 112 and the inner cylinder 113 can be smoothly pulled out of the composite filter chamber 4 in the horizontal direction as a whole.

[0058] In this embodiment, a threaded base 114 is provided at the bottom end of the inner cylinder 113, and a dust collection seat 115 is screwed to the bottom of the threaded base 114. The dust collection box 116 is fixed to the outside of the dust collection seat 115 and covers the lower part of the outer cylinder 112. Thus, after the entire cylindrical filter assembly 11 is removed, the operator can further unscrew the dust collection seat 115 to clean the deposited dust and sludge collected in the dust collection box 116. At the same time, the outer cylinder 112, the inner cylinder 113, and the ultrasonic oscillation element 117 can be individually maintained or replaced. The ultrasonic oscillation element 117 is embedded in the bottom wall of the mounting base 111, and its position is located in the upper space between the outer cylinder 112 and the inner cylinder 113. It is also more easily accessible after the entire filter assembly is removed, making it convenient to check the electrical connections and working status.

[0059] During reinstallation, the maintained cartridge filter assembly 11 is first returned to the composite filter chamber 4 through the inspection door 10, with its upper and lower ends returning to their respective installation positions between the two partitions 2. Then, the arc-shaped deflection blocks 122 of the upper and lower quick-release mechanisms 12 are rotated back to the closed state and locked by the latches 123, thus re-fixing the mounting base 111. Subsequently, the electric actuator 161 is controlled to descend, causing the pulse backflush nozzle 163 to pass through the upper space again and extend into the inner cylinder 113, restoring its working position. Due to the sliding guide effect of the piston plate 164 and the central cylinder 132, the pulse backflush nozzle 163 can be smoothly aligned during the return process, reducing the possibility of the nozzle deviating and colliding with the inner cylinder 113.

[0060] Example 3

[0061] See Figures 1 to 7 This embodiment is used to illustrate the operation mode of the present invention under the conditions of high oil content and high condensation component petrochemical tail gas.

[0062] In this embodiment, the petrochemical exhaust gas entering the exhaust gas inlet pipe 6 contains not only solid particles, but also a significant amount of oil mist, heavy organic vapors, and a certain amount of condensable droplets. To enhance the pre-separation effect, the condensation mechanism 9 is correspondingly positioned on the outer periphery of the upper half of the cyclone pre-separation chamber 3, and its overall horizontal height is higher than that of the exhaust gas inlet pipe 6. This arrangement ensures that after the exhaust gas enters the cyclone pre-separation chamber 3, it first forms a strong rotation in the lower part, and then gas-liquid separation occurs in the upper cooling area, avoiding the weakening of the initial cyclone due to large-area condensation at low levels.

[0063] In this embodiment, after the exhaust gas enters the housing 1 tangentially through the exhaust gas inlet pipe 6, it forms an upward spiral rotating flow along the inner wall of the housing under the action of the spiral guide vanes 8. Heavier particles and droplets in the exhaust gas are first thrown towards the inner wall of the housing 1 under centrifugal force and collect at the bottom of the cone. Simultaneously, cooling water is continuously supplied through the spiral cooling coil 92 in the condensation mechanism 9, reducing the temperature of the corresponding wall section of the housing 1, causing some of the heavier components in the exhaust gas to condense on the upper wall surface. The condensed liquid, along with the oil mist thrown towards the wall surface, flows down the wall surface and is discharged through the drain pipe 7.

[0064] After the aforementioned pre-separation, the exhaust gas enters the composite filter chamber 4. Due to the relatively high amount of oily impurities in this operating condition, the outer cylinder 112, acting as a sintered metal filter layer, prioritizes the interception of larger particles, larger droplets, and some oil mist agglomerates; the inner cylinder 113, on the other hand, performs fine filtration of the remaining fine particles and micro-droplets. During continuous operation, oily adhering substances easily form an adhesion layer on the surfaces of the inner and outer double-layer filter media. At this time, the combined action of the ultrasonic oscillation element 117 and the thermal pulse backflushing cleans the adhesion layer.

[0065] Specifically, when the controller 18 determines that the load on the filter element assembly is increasing based on the differential pressure sensor's detection results, it first activates the ultrasonic oscillation element 117 to generate high-frequency vibrations between the outer cylinder 112 and the inner cylinder 113, causing the attached layer to loosen. Then, it controls the pulse valve to open, allowing compressed gas to enter the outer casing 171 through the inlet pipe 174. After being heated by the heater 172 in the spiral heating tube 173, it forms a thermal pulse airflow, which is then sprayed into the inner cylinder 113 through the outlet pipe 175, connecting hose 23, air guide pipe 165, and pulse backflush nozzle 163. Because the injected gas is heated compressed gas, it not only has a pulse impact effect but also a thermal softening effect on oily deposits and condensates adhering to the filter material surface, further improving the peeling efficiency.

[0066] The detached dust and sludge fall into the dust collection box 116 under gravity along the lower structure of the inner cylinder 113 and the outer cylinder 112. Since the dust collection box 116 is fitted onto the outside of the outer cylinder 112 and connected to the dust collection seat 115, it can centrally collect pollutants settling from the periphery of the double-layer cylinder. After multiple cycles of hot backflushing and ultrasonic vibration, the filtration capacity of the cylindrical filter element assembly 11 can be maintained at a relatively stable level, reducing the probability of frequent downtime maintenance due to oily blockage.

[0067] In this embodiment, the activated carbon module 133 in the fine filtration assembly 13, in addition to performing the conventional VOCs adsorption function, also further purifies the residual organic odor components after the pretreatment. The gas purified by the activated carbon module 133 is finally discharged through the clean gas emission pipe 15.

[0068] Example 4

[0069] See Figures 1 to 7 This embodiment is used to illustrate the automatic operation process of the present invention in intelligent control mode.

[0070] In this embodiment, the controller 18 receives signals collected by the first pressure sensor located on the air inlet side of the composite filter chamber 4, the second pressure sensor located on the air outlet side of the composite filter chamber 4, and the gas flow sensor located at the exhaust gas inlet pipe 6, and controls the ultrasonic oscillation element 117, the external compressed air source pulse valve, and the electric heating mechanism 17 to work according to the preset control logic.

[0071] After the equipment starts up, the exhaust gas is continuously discharged after passing through cyclone pre-separation, condensation separation, filtration by the cylindrical filter element 11, and adsorption treatment by the fine filter element 13. The controller 18 continuously compares the pressure difference between the inlet and outlet sides of the composite filter chamber 4. When the pressure difference is within the normal range, the equipment maintains normal filtration operation, and the electric heating mechanism 17 and the pulse backflushing component 16 do not operate.

[0072] When the differential pressure rises to the first set threshold, the controller 18 determines that there is a certain degree of deposit blockage on the surface of the cartridge filter assembly 11. First, it starts the ultrasonic oscillation element 117 to loosen the deposit layer between the double-layer filter elements. Then, it controls the external pulse valve to open instantaneously, so that compressed gas at normal temperature or set temperature enters the inner cavity of the inner cylinder 113 through the pulse backflush nozzle 163 to perform pulse backflush on the filter element.

[0073] If the differential pressure remains above the second set threshold after multiple routine backflushing cycles, the controller 18 further activates the heater 172 to heat the compressed gas entering the spiral heating tube 173 before sending it into the pulse backflushing nozzle 163, thereby enhancing the ability to remove sludge and condensation blockages. This allows the invention to be applicable not only to conventional dust-laden exhaust gas treatment conditions but also to petrochemical exhaust gas treatment conditions containing a large amount of oil mist and condensable components.

[0074] When the cartridge filter assembly 11 needs to be replaced, the controller 18 can enter maintenance mode. In maintenance mode, the controller 18 first shuts down the ultrasonic oscillation element 117, the heater 172, and the pulse valve, and then controls the electric actuator 161 to move the pulse backflush nozzle 163 upward to the position detached from the cartridge filter assembly 11. Afterward, the operator only needs to open the access door 10 and release the quick-release mechanism 12 to quickly pull out the cartridge filter assembly 11. After maintenance is completed and the cartridge is reinstalled, the controller 18 then controls the electric actuator 161 to move the pulse backflush nozzle 163 downward back to its working position inside the filter element, and then exits maintenance mode, and the equipment resumes normal automatic operation.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An environmentally friendly petrochemical tail gas separation and treatment device, characterized in that, include: The shell (1) has a cyclone pre-separation chamber (3), a composite filtration chamber (4) and a fine filtration discharge chamber (5) arranged sequentially from bottom to top along the airflow direction through a partition (2). The bottom side wall of the shell (1) is fixedly connected to the tail gas inlet pipe (6) corresponding to the position of the cyclone pre-separation chamber (3). The tail gas inlet pipe (6) is arranged along the tangent direction of the shell (1). The top side wall of the shell (1) is fixedly connected to the position of the fine filtration discharge chamber (5). The top wall of the shell (1) is fixedly connected to the top cover (14) by bolts. A swirling guide mechanism is installed on the inner wall of the swirling pre-separation chamber (3). The bottom of the swirling pre-separation chamber (3) is conical. The bottom end of the swirling pre-separation chamber (3) is fixedly connected to a drain pipe (7) with a valve. The condensing mechanism (9) is fixed on the outer wall of the housing (1) at the position corresponding to the swirling pre-separation chamber (3). The horizontal height of the condensing mechanism (9) is higher than that of the exhaust gas inlet pipe (6). A cylindrical filter element assembly (11) is installed in the composite filter chamber (4). The cylindrical filter element assembly (11) is fixed between two partitions (2) by a quick-release mechanism (12). The housing (1) is equipped with an inspection door (10) corresponding to the position of the composite filter chamber (4). Fine filter assembly (13), which is installed in the fine filter discharge chamber (5), and the horizontal height of the fine filter assembly (13) is lower than that of the clean air discharge pipe (15). The pulse backflush assembly (16) is fixed on the top cover (14), and the bottom of the pulse backflush assembly (16) extends into the cylindrical filter element assembly (11). An electric heating mechanism (17) that cooperates with the pulse backflush assembly (16) is fixed on the top cover (14).

2. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The swirling guide mechanism is a spiral guide blade (8), which is evenly distributed along the inner wall of the shell (1).

3. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The condensation mechanism (9) includes an outer sleeve (91) that forms an annular cooling cavity with the outer wall of the housing (1), and a spiral cooling coil (92) disposed in the annular cooling cavity. The inlet end of the spiral cooling coil (92) is connected to an external cooling water supply pipe, and the outlet end of the spiral cooling coil (92) is connected to an external cooling water return pipe.

4. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The cartridge filter assembly (11) includes a mounting base (111), an outer cylinder (112) is fixed to the outer side of the bottom end of the mounting base (111), an inner cylinder (113) is fixed to the center of the bottom end of the mounting base (111) and is coaxially arranged with the outer cylinder (112), a plurality of symmetrically arranged ultrasonic oscillation elements (117) are embedded in the bottom wall of the mounting base (111), and an air outlet (21) communicating with the inner cavity of the inner cylinder (113) is opened through the top wall of the mounting base (111). The outer cylinder (112) is a sintered metal filter layer; The inner cylinder (113) is a pleated nanofiber filter material layer, and a threaded base (114) is fixed at the bottom end of the inner cylinder (113). A dust collection seat (115) is screwed to the bottom end of the threaded base (114). The outer edge of the dust collection seat (115) abuts against the bottom wall of the outer cylinder (112), and a dust collection box (116) is fixed on the outside of the dust collection seat (115). The dust collection box (116) is fitted onto the outside of the outer cylinder (112); The ultrasonic oscillation element (117) is located between the outer cylinder (112) and the inner cylinder (113).

5. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, Several arc-shaped through slots (19) are symmetrically opened on the bottom partition (2), and an exhaust slot (20) is opened through the center of the upper partition (2).

6. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The quick-release mechanism (12) is provided in two sets. The two sets of quick-release mechanisms (12) are respectively installed on the side walls of the two partitions (2) that are close to each other. The quick-release mechanism (12) includes an arc-shaped fixing block (121). The arc-shaped fixing block (121) is fixed on the partition (2). An arc-shaped deflection block (122) is rotatably installed on one side of the arc-shaped fixing block (121) through a hinge. The other side of the arc-shaped fixing block (121) is connected to the arc-shaped deflection block (122) through a buckle (123).

7. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The fine filtration assembly (13) includes a base plate (131), which is fixed between the inner walls of the fine filtration discharge chamber (5). A central cylinder (132) is fixed in the center of the base plate (131). Activated carbon modules (133) are symmetrically installed on the top wall of the base plate (131). Fan-shaped through slots (22) are symmetrically opened on the base plate (131).

8. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 7, characterized in that, The pulse backflush assembly (16) includes an electric push rod (161) fixed at the center of the top wall of the top cover (14). The bottom movable end of the electric push rod (161) slides through the top cover (14) and is fixed with a connecting seat (162). A piston plate (164) is fixed on the outer wall of the bottom movable end of the electric push rod (161). The bottom end of the connecting seat (162) is fixed with a pulse backflush nozzle (163), and the top wall of the connecting seat (162) is fixed with an air guide pipe (165) that communicates with the inner cavity of the pulse backflush nozzle (163). The piston plate (164) is slidably mounted inside the central cylinder (132).

9. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 8, characterized in that, The electric heating mechanism (17) includes a housing (171), which is fixed to the top wall of the top cover (14). A heater (172) is fixed to the side wall of the housing (171). A spiral heating tube (173) that cooperates with the heater (172) is fixed to the inner wall of the housing (171). An air inlet pipe (174) is fixedly connected to one side of the top wall of the housing (171). An air outlet pipe (175) is fixedly connected to the side of the housing (171) away from the heater (172). The intake pipe (174) is connected to an external compressed air source via a pipeline; The bottom end of the air outlet pipe (175) extends into the central cylinder (132), and the air outlet pipe (175) is connected to the air guide pipe (165) through the connecting hose (23).

10. The environmentally friendly petrochemical tail gas separation and treatment equipment according to claim 1, characterized in that, The housing (1) is equipped with an intelligent differential pressure adaptive control system, including: a first pressure sensor set on the air inlet side of the composite filter chamber (4), a second pressure sensor set on the air outlet side of the composite filter chamber (4), a gas flow sensor set on the exhaust gas inlet pipe (6), and a controller (18) set on the outer wall of the housing (1). The controller (18) is electrically connected to the first pressure sensor, the second pressure sensor, the gas flow sensor, the ultrasonic oscillation element (117), and the pulse valve of the external compressed air source.

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