Gas filter for petrochemical industry

Abstract

The invention discloses a gas filter for petrochemical engineering, which belongs to the technical field of gas filters and comprises an outer shell and a filtering mechanism for filtering fuel gas. A flow mechanism for controlling the flow of introduced fuel gas and a separation mechanism for collecting steam in the fuel gas are arranged in the outer shell; the large-diameter section of the variable-diameter rotary drum can periodically extrude the half-thickness filter element, on one hand, adsorption filler in the filter element is distributed more uniformly, the adsorption capacity on organic waste gas is enhanced, and on the other hand, for a common viscous mixture in petrochemical engineering fuel gas, the extrusion process is beneficial to diffusion and dispersion of the viscous mixture and blockage prevention; according to the device, high-temperature fuel gas entering the inner filter cartridge can be rapidly cooled, water vapor and condensable components in the gas are promoted to be condensed into liquid, separation and recovery of the vapor are achieved while the gas is filtered, and independent collection and treatment of water in the fuel gas are achieved.

Description

Technical Field

[0001] This invention relates to the field of gas filter technology, and in particular to a gas filter for petrochemical applications. Background Technology

[0002] In petrochemical production, the treatment and purification of fuel gases is a crucial step. These fuel gases typically contain organic waste gases, viscous mixtures, high-temperature steam, and various particulate impurities. If they are not effectively filtered before entering downstream equipment or combustion systems, it will not only reduce equipment operating efficiency but may also cause pipeline blockages, equipment corrosion, and even safety accidents. Therefore, gas filtration devices have a wide range of applications in the petrochemical industry.

[0003] Existing gas filtration technologies mostly employ fixed filter elements or screen structures, removing impurities from gases through physical interception or adsorption. However, in practical applications, traditional filters have the following shortcomings: Unstable filtration efficiency: Traditional filters typically use a continuous air intake method, making the filter element surface prone to blockage due to impurity accumulation, leading to decreased filtration efficiency, and they are difficult to self-regulate or clean during operation; Poor adaptability: Petrochemical fuel gases often exhibit high temperature and pressure fluctuations, and traditional filtration devices lack effective flow control mechanisms. When gas flow rates or pressures are too high, they can easily cause impact damage to the filter element or equipment, shortening equipment lifespan; Difficulty in handling steam and viscous substances: High-temperature fuel gases often contain condensable steam and highly viscous mixtures. These substances easily adhere to the filter element surface, causing blockage and affecting gas flow and filtration efficiency. Traditional equipment often lacks effective cooling, condensation, and separation structures; Low filter element utilization: Traditional filter elements struggle to achieve efficient utilization of the adsorption medium during filtration, requiring complete replacement once partially saturated, increasing operating costs and maintenance frequency. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a gas filtration device with a reasonable structure, capable of adapting to pressure fluctuations, possessing cooling and condensation functions, and improving filter element utilization. The technical solution adopted by this invention is: a gas filter for petrochemical applications, comprising an outer shell and a filtration mechanism for filtering fuel gas, wherein the outer shell is provided with a flow mechanism and a separation mechanism for collecting vapor in the fuel gas. The filtration mechanism includes an outflow side pipe and an inflow side pipe fixedly installed on the outer housing. An inner filter cylinder is fixedly installed inside the outer housing. An inner setting plate is fixedly installed on the inner filter cylinder. Two communication modules are provided on the inner setting plate. Each communication module includes a communication block fixedly installed on the inner setting plate. The communication block is provided with a through hole communicating with the inner filter cylinder. A circulation drive component, which is a small compressor, is fixedly installed on the inner setting plate. A vertical drive shaft is rotatably installed on the inner setting plate. An upper drive wheel is fixedly installed on the top of the vertical drive shaft. The separation mechanism includes a power housing fixedly installed inside an outer housing, a temporary storage cylinder fixedly installed on the power housing, an air inlet pipe fixedly installed on the temporary storage cylinder, an outlet inner sleeve fixedly installed inside the outlet side pipe, and an exhaust pipe fixedly installed on the outlet inner sleeve.

[0005] Furthermore, the filtration mechanism also includes a central rotating column rotatably installed inside the inner filter cylinder, a variable diameter rotating cylinder fixedly installed on the central rotating column, two transition rotating columns rotatably installed on the variable diameter rotating cylinder, the variable diameter rotating cylinder being composed of a small diameter section and a large diameter section, a half-thickness filter element fixedly installed in half of the inner filter cylinder, the connecting block of the air inlet connecting module being located above the half-thickness filter element, and the connecting block of the air outlet connecting module not being located above the half-thickness filter element.

[0006] Furthermore, the filtration mechanism also includes a top turntable fixedly installed on the top of the central rotating column. The vertical drive shaft drives the top turntable to rotate through the lower drive belt. The vertical drive shaft drives the small compressor through the drive belt. An outward push ramp is fixedly installed on the top turntable, and the outward push ramp has a slope surface.

[0007] Furthermore, the communication module also includes an external sliding column slidably mounted on the inner setting plate. A communication hole block is fixedly mounted on the external sliding column. A sliding column spring is provided between the communication hole block and the inner setting plate. A communication hole is provided on the communication hole block. A contact roller is rotatably mounted on the communication hole block. When the external push ramp block is not in contact with the contact roller, the communication hole block closes the through hole of the communication block. When the external push ramp block pushes the communication hole block inward through the contact roller, the communication hole communicates with the through hole of the communication block.

[0008] Petrochemical fuel gas enters the connecting block of the connecting module located above the semi-thick filter element through the intake pipe. As the top turntable rotates, when the slope of the outward push block contacts the contact roller of the connecting module above the semi-thick filter element, it pushes the contact roller, connecting hole block, and external sliding column outward, compressing the sliding column spring. At this time, the connecting hole aligns with the connecting block, and the fuel gas enters the inner setting plate through the connecting block and connecting hole. Subsequently, the fuel gas enters the semi-thick filter element, where the organic waste gas in the fuel gas is adsorbed. Then, the fuel gas enters the part of the inner filter cylinder without the semi-thick filter element. When the outward push block disengages from the contact roller of the connecting module above the semi-thick filter element, the sliding column spring rebounds, causing the connecting hole block to close the connecting block again. At this time, the fuel... When gas stops entering the inner filter cartridge, and the outward-pushing ramp contacts the portion of the inner filter cartridge above the portion without a semi-thick filter element, the ramp surface of the outward-pushing ramp contacts the contact roller of the connecting module above the portion of the inner filter cartridge above the semi-thick filter element. This pushes the contact roller, connecting hole block, and external sliding column outward, compressing the sliding column spring. At this time, the connecting hole aligns with the connecting block, and the filtered fuel gas in the inner filter cartridge is discharged into the exhaust pipe, and then discharged from the discharge inner sleeve and the outflow side pipe. When the outward-pushing ramp disengages from the contact roller of the connecting module above the portion of the inner filter cartridge above the semi-thick filter element, the sliding column spring rebounds, causing the connecting hole block to close the connecting block again. At this time, the fuel gas stops being discharged. This process repeats, achieving intermittent filtration and discharge of organic waste gas in the fuel gas.

[0009] When the top turntable rotates, it drives the variable-diameter drum to rotate via the central rotating column. When the large-diameter section of the variable-diameter drum comes into contact with the semi-thick filter element, it will compress the semi-thick filter element, making the adsorbent filling material inside the semi-thick filter element absorb organic waste gas more evenly. At the same time, the compression characteristics of the semi-thick filter element allow for the use of thickened media with higher filling density in the same volume, extending the service life of the semi-thick filter element. In addition, for mixtures with high viscosity in petrochemical fuel gases, it diffuses them inside the semi-thick filter element to prevent clogging. When the small-diameter section of the variable-diameter drum moves to the side of the semi-thick filter element, the small-diameter section of the variable-diameter drum will not come into contact with the semi-thick filter element. The transition rotating column is used for the transition between the large-diameter section and the small-diameter section of the variable-diameter drum.

[0010] Furthermore, the flow mechanism includes a feed inner cylinder fixedly installed inside the inflow side pipe, an inlet connecting pipe fixedly installed on the feed inner cylinder, the inlet connecting pipe being connected to the power housing, and a centering flow plate fixedly installed at the end of the feed inner cylinder.

[0011] Furthermore, the flow mechanism also includes a fixed groove block fixedly installed inside the feed inner cylinder. Multiple air passages are provided between the fixed groove block and the inner wall of the feed inner cylinder. A conical cavity is provided inside the central flow plate. An inner blowing sleeve is slidably installed inside the fixed groove block. Multiple connecting side grooves are provided on the side of the inner blowing sleeve. A sealing ring block is fixedly installed on the inner blowing sleeve. Multiple outer sliding columns are fixedly installed on the sealing ring block. The outer sliding columns are slidably installed with the fixed groove block. A return spring is provided between the sealing ring block and the fixed groove block. In the initial state, the sealing ring block is not in contact with the fixed groove block. After the sealing ring block moves, it can close one end of the air passage.

[0012] Petrochemical fuel gas enters through the central flow plate, and after passing through the conical cavity of the central flow plate, it is collected into the inner blowing sleeve. The fuel gas entering has a certain velocity and pressure, which pushes the inner blowing sleeve and the sealing ring block to slide along the fixed groove block. The return spring is compressed, and then the fuel gas enters between the sealing ring block and the fixed groove block through the connecting side groove. Then, the fuel gas enters the feed inner cylinder through the air passage between the feed inner cylinder and the fixed groove block, and then enters the power housing through the inlet connecting pipe. If the flow rate or pressure of the fuel gas entering the central flow plate is too high, it will push the inner blowing sleeve and the sealing ring block to move, causing the sealing ring block to contact the fixed groove block. At this time, the fuel gas cannot enter between the fixed groove block and the feed inner cylinder from between the sealing ring block and the fixed groove block. That is, when the flow rate or pressure of the fuel gas is too high, the fuel gas cannot directly enter the filter, and its flow rate or pressure needs to be adjusted to prevent filter damage.

[0013] Furthermore, the separation mechanism also includes an air intake cavity disposed within the power housing, an eccentric rotating column is rotatably mounted within the air intake cavity, an eccentric rotating block is fixedly mounted on the eccentric rotating column, the eccentric rotating column drives the upper transmission wheel to rotate through a transmission component, and multiple rotating sliding plates are slidably mounted on the eccentric rotating block, with springs disposed between the rotating sliding plates and the eccentric rotating block.

[0014] Furthermore, the separation mechanism also includes an outer fixing frame fixedly installed inside the temporary storage cylinder, a one-way push block slidably installed on the outer fixing frame, and a one-way spring provided between the one-way push block and the outer fixing frame.

[0015] Furthermore, the separation mechanism also includes a bottom cooler fixedly installed inside the outer housing, an inner cooling sleeve fixedly installed on the outside of the inner filter cylinder, an outer insulation sleeve fixedly installed between the inner cooling sleeve and the outer housing, a cooling pipe provided inside the inner cooling sleeve, one end of the circulation drive component connected to one end of the cooling pipe, the other end of the cooling pipe connected to the bottom cooler, the other end of the circulation drive component connected to the bottom cooler, an inner drain valve provided at the bottom of the inner filter cylinder, an inner drain pipe fixedly installed below the inner drain valve, the inner drain pipe connected to an external water pipe, and a heat sink provided at the bottom of the bottom cooler.

[0016] The fuel gas entering the power housing will drive the eccentric rotating block and eccentric rotating column to rotate via the rotating slide plate. The eccentric rotating column drives the upper transmission wheel and vertical transmission shaft to rotate via the transmission belt. The vertical transmission shaft drives the top turntable to rotate via the lower transmission belt. The vertical transmission shaft drives the small compressor via the drive belt. The small compressor draws the cooling water in the bottom cooler into the inner cooling jacket for circulation through the cooling pipe. The fuel gas then pushes the one-way pusher block to move outward. The one-way spring is compressed, and then the fuel gas enters the temporary storage cylinder. Then the fuel gas enters the connecting block of the connecting module above the semi-thick filter element through the air intake pipe. The one-way pusher block and one-way spring prevent the fuel gas in the temporary storage cylinder from flowing back into the power housing.

[0017] The high-temperature fuel gas in the inner filter cartridge is rapidly cooled by the cooling water in the cooling pipes inside the inner cooling jacket, causing the vapor in the fuel gas to condense and collect at the bottom of the inner filter cartridge. By opening the inner drain valve, the water in the inner filter cartridge can be discharged through the inner drain pipe for separate collection.

[0018] The beneficial effects of this invention compared with the prior art are: (1) By setting a flow mechanism consisting of a central flow plate, an inner blowing sleeve, a closed ring block and a reset spring, when the pressure of the fuel gas entering the filter is too high, the gas will push the inner blowing sleeve and the closed ring block to move until they contact the fixed slot block, automatically cutting off the airflow channel, forcing the gas to be unable to directly enter the filter, realizing dynamic limitation of the intake pressure, effectively avoiding filter element damage or internal structure failure caused by excessive airflow impact, and improving the stability and safety of the equipment under complex working conditions; (2) By cooperating with the top turntable, the outer push slope block and multiple connecting modules, this invention realizes the intermittent entry and exit of fuel gas. When the outer push slope block contacts the corresponding connecting module, the module is opened to allow air intake or exhaust, and automatically closes after separation, ensuring that the gas has sufficient residence time in the semi-thick filter element for adsorption and filtration, and avoiding premature saturation of the filter element surface caused by continuous air intake, thereby improving the adsorption efficiency of organic waste gas and the overall utilization rate of the filter element; 3) The filter mechanism set up in this invention, driven by the central rotating column, will periodically squeeze the large diameter section of the variable diameter rotating cylinder to make the adsorbent filling material in the filter element more uniformly distributed and enhance the adsorption capacity of organic waste gas. On the other hand, for the viscous mixture commonly found in petrochemical fuel gas, the squeezing process helps to diffuse and disperse it, preventing it from excessively accumulating in the local area of ​​the filter element and causing blockage. At the same time, the compression characteristics of the semi-thick filter element allow for the use of a medium with a higher filling density in the same volume, which extends the service life of the filter element and improves the filtration accuracy. (4) This invention can quickly cool down the high temperature fuel gas entering the inner filter cylinder through a small compressor, bottom cooler and circulating cooling pipe in the inner cooling jacket, causing the water vapor and condensable components in the gas to condense into liquid and be collected at the bottom of the inner filter cylinder and discharged through the inner drain valve. While filtering the gas, the separation and recovery of steam are realized, which not only reduces the adsorption burden of the filter element, but also realizes the separate collection and treatment of water in the fuel gas, improving the environmental protection and economy of the overall process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention (internal).

[0021] Figure 3 This is a schematic diagram of the filter mechanism structure of the present invention. Figure 1 .

[0022] Figure 4 This is a schematic diagram of the filter mechanism structure of the present invention. Figure 2 .

[0023] Figure 5 This is a schematic diagram of the filter mechanism structure of the present invention. Figure 3 .

[0024] Figure 6 This is a schematic diagram of the connected module structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the variable diameter rotary drum structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the flow mechanism structure of the present invention. Figure 1 .

[0027] Figure 9 This is a schematic diagram of the flow mechanism structure of the present invention. Figure 2 .

[0028] Figure 10 This is a schematic diagram of the flow mechanism structure of the present invention. Figure 3 .

[0029] Figure 11 This is a schematic diagram of the flow mechanism structure of the present invention. Figure 4 .

[0030] Figure 12 This is a schematic diagram of the separation mechanism of the present invention. Figure 1 .

[0031] Figure 13 This is a schematic diagram of the separation mechanism of the present invention. Figure 2 .

[0032] Figure 14 This is a schematic diagram of the separation mechanism of the present invention. Figure 3 .

[0033] Figure 15 This is a schematic diagram of the separation mechanism of the present invention. Figure 4 .

[0034] Figure 16 This is a schematic diagram of the separation mechanism of the present invention. Figure 5 .

[0035] Reference numerals: 101-Outer shell; 102-Outflow side pipe; 103-Inflow side pipe; 104-Inner filter cylinder; 105-Inner mounting plate; 106-Circulation drive component; 107-Drive belt; 108-Vertical drive shaft; 109-Upper drive wheel; 110-Lower drive belt; 111-Top turntable; 112-Variable diameter drum; 113-Semi-thickness filter element; 114-Transition rotating column; 115-Central rotating column; 116-Outward push ramp; 117-Connecting hole block; 118-Connecting hole; 119-Outer sliding column; 120-Sliding column spring; 121-Contact roller; 122-Connecting block; 201-Infeed inner cylinder; 202-Infeed connecting pipe; 203-Return 204-Central flow plate; 205-Closed ring block; 206-Inner blowing sleeve; 207-Connecting side groove; 208-Fixed groove block; 209-Outer sliding column; 210-Reset spring; 301-Air passage; 302-Power housing; 303-Temporary storage cylinder; 304-Exhaust pipe; 305-Bottom cooler; 306-Eccentric rotating block; 307-Rotating slide plate; 308-Intake inner cavity; 309-One-way push block; 310-Outer fixed frame; 311-One-way spring; 312-Outer insulation sleeve; 313-Inner cooling sleeve; 314-Inner drain valve; 315-Inner drain pipe; 316-Eccentric rotating column; 317-Drive belt; 318-Intake pipe. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0037] Example: Reference Figures 1-15 A gas filter for petrochemical applications includes an outer housing 101 and a filter mechanism for filtering fuel gas. The outer housing 101 is provided with a flow mechanism and a separation mechanism for collecting vapor in the fuel gas. The filtration mechanism includes an outflow side pipe 102 and an inflow side pipe 103 fixedly installed on the outer housing 101. An inner filter cylinder 104 is fixedly installed inside the outer housing 101. An inner mounting plate 105 is fixedly installed on the inner filter cylinder 104. Two communication modules are provided on the inner mounting plate 105. The communication module includes a communication connector 122 fixedly installed on the inner mounting plate 105. The communication connector 122 is provided with a through hole communicating with the inner filter cylinder 104. A circulation drive component 106 is fixedly installed on the inner mounting plate 105. The circulation drive component 106 is a small compressor. A vertical drive shaft 108 is rotatably installed on the inner mounting plate 105. An upper drive wheel 109 is fixedly installed on the top of the vertical drive shaft 108. The separation mechanism includes a power housing 301 fixedly installed inside the outer housing 101, a temporary storage cylinder 302 fixedly installed on the power housing 301, an air inlet pipe 318 fixedly installed on the temporary storage cylinder 302, an outlet inner sleeve 303 fixedly installed inside the outlet side pipe 102, and an exhaust pipe 304 fixedly installed on the outlet inner sleeve 303.

[0038] like Figures 3-7 As shown, the filtration mechanism also includes a central rotating column 115 rotatably installed inside the inner filter cylinder 104. A variable diameter rotating cylinder 112 is fixedly installed on the central rotating column 115. Two transition rotating columns 114 are rotatably installed on the variable diameter rotating cylinder 112. The variable diameter rotating cylinder 112 consists of a small diameter section and a large diameter section. A half-thickness filter element 113 is fixedly installed in half of the inner filter cylinder 104. The connecting block 122 of the connecting module for air intake is located above the half-thickness filter element 113. The connecting block 122 of the connecting module for air outlet is not located above the half-thickness filter element 113.

[0039] like Figures 3-7 As shown, the filtration mechanism also includes a top turntable 111 fixedly installed on the top of the central rotating column 115. The vertical drive shaft 108 drives the top turntable 111 to rotate through the lower drive belt 110. The vertical drive shaft 108 drives the circulating drive component 106 through the drive belt 107. An outward push ramp 116 is fixedly installed on the top turntable 111, and the outward push ramp 116 is provided with a slope.

[0040] like Figures 3-7 As shown, the communication module also includes an external slide column 119 slidably mounted on the inner mounting plate 105. A communication hole block 117 is fixedly mounted on the external slide column 119. A slide column spring 120 is provided between the communication hole block 117 and the inner mounting plate 105. A communication hole 118 is provided on the communication hole block 117. A contact roller 121 is rotatably mounted on the communication hole block 117. When the outward push ramp 116 is not in contact with the contact roller 121, the communication hole block 117 closes the through hole of the communication connector 122. When the outward push ramp 116 pushes the communication hole block 117 inward through the contact roller 121, the communication hole 118 communicates with the through hole of the communication connector 122.

[0041] Pressurized petrochemical fuel gas enters the connecting block 122 of the connecting module located above the semi-thick filter element 113 through the intake pipe 318. As the top turntable 111 rotates, when the slope of the outward pusher block 116 contacts the contact roller 121 of the connecting module located above the semi-thick filter element 113, it pushes the contact roller 121, the connecting hole block 117, and the outer slide column 119 to slide outward, compressing the slide column spring 120. At this time, the connecting hole 118 connects with the connecting block 122, and the fuel gas enters the inner setting plate 105 through the connecting block 122 and the connecting hole 118. Half of the filter cylinder 104 is set with A semi-thick filter element 113 is installed, and then fuel gas enters the semi-thick filter element 113. The semi-thick filter element 113 adsorbs the organic waste gas in the fuel gas. When the outward push ramp 116 disengages from the contact roller 121 of the connecting module located above the semi-thick filter element 113, the sliding spring 120 rebounds, causing the connecting hole block 117 to close the connecting block 122 again. At this time, the fuel gas stops entering the inner filter cylinder 104. When the outward push ramp 116 is above the part of the inner filter cylinder 104 where the semi-thick filter element 113 is not installed, the slope surface of the outward push ramp 116 and the part of the inner filter cylinder 104 where the semi-thick filter element 113 is not installed... When the contact roller 121 of the upper connecting module contacts, it pushes the contact roller 121, the connecting hole block 117, and the outer slide column 119 to slide outward, compressing the slide column spring 120. At this time, the connecting hole 118 connects with the connecting block 122. Because the fuel gas pressure entering the filter cartridge 104 is high, while the external pressure is normal or low when the exhaust pipe 304 is connected, the gas flows towards the connecting block 122 connected to the exhaust pipe 304. That is, the fuel gas then enters the part of the inner filter cartridge 104 where the semi-thick filter element 113 is not installed. At this time, the fuel gas filtered in the inner filter cartridge 104 is discharged into the exhaust pipe 304. The gas is then discharged from the inner sleeve 303 and the outflow side pipe 102. Since the outflow side pipe 102 is connected to the external pipe, and the external pipe is connected to the outside, it is always under normal pressure. When the gas flows out from the outflow side pipe 102, the pressure will be slowly released, and the gas will always flow outward. When the outward push ramp 116 disengages from the contact roller 121 of the connecting module located above the part of the inner filter cylinder 104 where the half-thick filter element 113 is not installed, the sliding spring 120 rebounds, causing the connecting hole block 117 to close the connecting block 122 again. At this time, the fuel gas stops being discharged. This process is repeated to achieve intermittent filtration and discharge of organic waste gas in the fuel gas.

[0042] When the top turntable 111 rotates, it drives the variable-diameter drum 112 to rotate via the central rotating column 115. When the large-diameter section of the variable-diameter drum 112 contacts the semi-thick filter element 113, it will compress the semi-thick filter element 113, making the adsorbent packing material inside the semi-thick filter element 113 absorb organic waste gas more evenly. The compression process changes the pore structure and flow channel distribution inside the semi-thick filter element 113. The adsorbent medium inside the filter element undergoes relative displacement and rearrangement under the action of external force. The voids or uneven accumulation areas that may have existed before are compacted and filled, making the medium distribution more dense and uniform. The uniform distribution eliminates the preferential flow of gas. This design forces the fuel gas to make more thorough contact with the adsorption medium as it passes through the semi-thick filter element 113, avoiding localized overflow or short-circuiting and thus improving overall adsorption efficiency. Simultaneously, the compressibility of the semi-thick filter element 113 allows for the use of a higher packing density of thickened medium within the same volume. Because the semi-thick filter element 113 has a compressible elastic structure, it can be manufactured with a higher initial packing density to accommodate more adsorption medium. The compressibility allows the semi-thick filter element 113 to adjust its internal space through compression after installation or during operation, providing deformation margin for high-density packing. Periodic compression can further enhance this... The medium in a high-density filling state is further compacted and activated, making the contact between the originally tightly packed medium particles more sufficient. This results in a larger adsorption surface area and higher adsorption capacity under the same volume conditions, effectively extending the service life of the semi-thick filter element 113. Simultaneously, for highly viscous mixtures in petrochemical fuel gases, the continuous compression between the variable-diameter rotating cylinder 112 and the semi-thick filter element 113 diffuses the viscous mixture within the filter element 113. When the large-diameter section of the variable-diameter rotating cylinder 112 compresses the semi-thick filter element 113, a stress field is generated inside the filter element 113, forcing the viscous mixture to diffuse under pressure. The low-medium-area migration and permeation, when the compression is released, the filter element elastically recovers, further promoting the redistribution of viscous substances. The periodic compression and release action continuously pushes and disperses the viscous substances that may have adhered to the surface of the semi-thick filter element 113 or blocked local pores into various parts of the filter element, avoiding excessive accumulation in a single location, thereby effectively preventing the semi-thick filter element 113 from clogging. When the small-diameter section of the variable-diameter rotating cylinder 112 moves to the side of the semi-thick filter element 113, the small-diameter section of the variable-diameter rotating cylinder 112 will not contact the semi-thick filter element 113. The transition rotating column 114 is used for the transition between the large-diameter section and the small-diameter section of the variable-diameter rotating cylinder 112.

[0043] like Figures 8-11 As shown, the flow mechanism includes a feed inner cylinder 201 fixedly installed in the inflow side pipe 103, an inlet connecting pipe 202 fixedly installed on the feed inner cylinder 201, the inlet connecting pipe 202 being connected to the power housing 301, and a return flow plate 203 fixedly installed at the end of the feed inner cylinder 201.

[0044] like Figures 8-11As shown, the flow mechanism also includes a fixed groove block 207 fixedly installed inside the feed inner cylinder 201. Multiple air passages 210 are provided between the fixed groove block 207 and the inner wall of the feed inner cylinder 201. A conical cavity is provided inside the central flow plate 203. An inner blowing sleeve 205 is slidably installed inside the fixed groove block 207. Multiple connecting side grooves 206 are provided on the side of the inner blowing sleeve 205. A sealing ring block 204 is fixedly installed on the inner blowing sleeve 205. Multiple outer sliding columns 208 are fixedly installed on the sealing ring block 204. The outer sliding columns 208 are slidably installed with the fixed groove block 207. A return spring 209 is provided between the sealing ring block 204 and the fixed groove block 207. In the initial state, the sealing ring block 204 is not in contact with the fixed groove block 207. After the sealing ring block 204 moves, it can close one end of the air passage 210.

[0045] Petrochemical fuel gas enters through the return flow plate 203, and after passing through the conical cavity of the return flow plate 203, it is collected into the inner blowing sleeve 205. The fuel gas entering has a certain velocity and pressure, which pushes the inner blowing sleeve 205 and the sealing ring block 204 to slide along the fixed groove block 207. The return spring 209 is compressed. Then, the fuel gas enters between the sealing ring block 204 and the fixed groove block 207 through the connecting side groove 206. Subsequently, the fuel gas enters the feed inner cylinder 201 through the air passage 210 between the feed inner cylinder 201 and the fixed groove block 207, and then enters the power supply through the inlet connecting pipe 202. If the flow rate or pressure of the fuel gas entering the central flow plate 203 in the housing 301 is too high, it will push the inner blowing sleeve 205 and the sealing ring block 204 to move, causing the sealing ring block 204 to contact the fixed groove block 207. At this time, the sealing ring block 204 closes one end of the air passage 210. At this time, the fuel gas cannot enter the air passage 210 between the fixed groove block 207 and the feed inner cylinder 201 from between the sealing ring block 204 and the fixed groove block 207. That is, when the flow rate or pressure of the fuel gas is too high, the fuel gas cannot directly enter the filter and its flow rate or pressure needs to be adjusted to prevent the filter from being damaged.

[0046] like Figures 12-16 As shown, the separation mechanism also includes an air intake cavity 308 disposed within the power housing 301. An eccentric rotating column 316 is rotatably mounted within the air intake cavity 308. An eccentric rotating block 306 is fixedly mounted on the eccentric rotating column 316. The upper transmission wheel 109 drives the eccentric rotating column 316 to rotate through a transmission component. Multiple rotating slide plates 307 are slidably mounted on the eccentric rotating block 306. A spring is disposed between the rotating slide plate 307 and the eccentric rotating block 306.

[0047] like Figures 12-16 As shown, the separation mechanism also includes an outer fixing frame 310 fixedly installed inside the temporary storage cylinder 302. A one-way push block 309 is slidably installed on the outer fixing frame 310, and a one-way spring 311 is provided between the one-way push block 309 and the outer fixing frame 310.

[0048] like Figures 12-16 As shown, the separation mechanism also includes a bottom cooler 305 fixedly installed inside the outer housing 101. An inner cooling sleeve 313 is fixedly installed on the outside of the inner filter cylinder 104. An outer insulation sleeve 312 is fixedly installed between the inner cooling sleeve 313 and the outer housing 101. A cooling pipe is provided inside the inner cooling sleeve 313. One end of the circulation drive component 106 is connected to one end of the cooling pipe, and the other end of the cooling pipe is connected to the bottom cooler 305. The other end of the circulation drive component 106 is connected to the bottom cooler 305. An inner drain valve 314 is provided at the bottom of the inner filter cylinder 104. An inner drain pipe 315 is fixedly installed below the inner drain valve 314 and is connected to an external water pipe. A heat sink is provided at the bottom of the bottom cooler 305.

[0049] The fuel gas entering the power housing 301 will drive the eccentric rotating block 306 and eccentric rotating column 316 to rotate via the rotating slide plate 307. The eccentric rotating column 316 drives the upper transmission wheel 109 and the vertical transmission shaft 108 to rotate via the transmission belt 317. The vertical transmission shaft 108 drives the top turntable 111 to rotate via the lower transmission belt 110. The vertical transmission shaft 108 drives the circulation drive component 106 via the drive belt 107. The circulation drive component 106 draws the cooling water in the bottom cooler 305 into the inner cooling jacket 313 for circulation through the cooling pipe. The fuel gas then pushes the one-way push block 309 to move outward, and the one-way spring 311 is compressed. Then the fuel gas enters the temporary storage cylinder 302. Then the fuel gas enters the connecting block 122 of the connecting module above the semi-thick filter element 113 through the air intake pipe 318. The one-way push block 309 and the one-way spring 311 prevent the fuel gas in the temporary storage cylinder 302 from flowing back into the power housing 301.

[0050] The high-temperature fuel gas in the inner filter cylinder 104 is rapidly cooled by the cooling water in the cooling pipes inside the inner cooling jacket 313, causing the vapor in the fuel gas to condense and be collected at the bottom of the inner filter cylinder 104. By opening the inner drain valve 314, the water in the inner filter cylinder 104 can be discharged through the inner drain pipe 315 for separate collection.

[0051] Working principle: Petrochemical fuel gas enters through the return flow plate 203, and after passing through the conical cavity of the return flow plate 203, it is collected into the inner blowing sleeve 205. The fuel gas entering has a certain speed and pressure, which pushes the inner blowing sleeve 205 and the sealing ring block 204 to slide along the fixed groove block 207. The return spring 209 is compressed, and then the fuel gas enters between the sealing ring block 204 and the fixed groove block 207 through the connecting side groove 206. Subsequently, the fuel gas enters the feed inner cylinder 201 through the air passage 210 between the feed inner cylinder 201 and the fixed groove block 207. After passing through the inlet connecting pipe 202, the fuel gas enters the power housing 301. If the flow rate or pressure of the fuel gas entering the return flow plate 203 is too high, it will push the inner blowing sleeve 205 and the sealing ring block 204 to move, causing the sealing ring block 204 to contact the fixed groove block 207. At this time, the fuel gas cannot enter the space between the fixed groove block 207 and the feed inner cylinder 201 from between the sealing ring block 204 and the fixed groove block 207. That is, when the flow rate or pressure of the fuel gas is too high, the fuel gas cannot directly enter the filter and its flow rate or pressure needs to be adjusted to prevent the filter from being damaged.

[0052] The fuel gas entering the power housing 301 will drive the eccentric rotating block 306 and eccentric rotating column 316 to rotate via the rotating slide plate 307. The eccentric rotating column 316 drives the upper transmission wheel 109 and the vertical transmission shaft 108 to rotate via the transmission belt 317. The vertical transmission shaft 108 drives the top turntable 111 to rotate via the lower transmission belt 110. The vertical transmission shaft 108 drives the circulation drive component 106 via the drive belt 107. The circulation drive component 106 draws the cooling water in the bottom cooler 305 into the inner cooling jacket 313 for circulation through the cooling pipe. The fuel gas then pushes the one-way push block 309 to move outward, and the one-way spring 311 is compressed. Then the fuel gas enters the temporary storage cylinder 302. Then the fuel gas enters the connecting block 122 of the connecting module above the semi-thick filter element 113 through the air intake pipe 318. The one-way push block 309 and the one-way spring 311 prevent the fuel gas in the temporary storage cylinder 302 from flowing back into the power housing 301.

[0053] Petrochemical fuel gas enters the connecting block 122 of the connecting module located above the semi-thick filter element 113 through the intake pipe 318. As the top turntable 111 rotates, when the slope of the outward pusher block 116 contacts the contact roller 121 of the connecting module located above the semi-thick filter element 113, it pushes the contact roller 121, the connecting hole block 117, and the outer sliding column 119 to slide outward. The sliding column spring 120 is compressed, and at this time, the connecting hole 118 is connected to the connecting block 122, and the fuel gas passes through the connecting block 122. 2. The fuel gas enters the inner setting plate 105 through the connecting hole 118, and then enters the semi-thick filter element 113. The semi-thick filter element 113 adsorbs the organic waste gas in the fuel gas. The cooling water in the cooling pipe in the inner cooling jacket 313 rapidly cools down the high temperature fuel gas in the inner filter cylinder 104, causing the vapor in the fuel gas to condense and be collected at the bottom of the inner filter cylinder 104. By opening the inner drain valve 314, the water in the inner filter cylinder 104 can be discharged through the inner drain pipe 315 for separate collection.

[0054] Subsequently, fuel gas enters the portion of the inner filter cylinder 104 without the semi-thick filter element 113. When the outward push ramp 116 disengages from the contact roller 121 of the connecting module located above the semi-thick filter element 113, the sliding spring 120 rebounds, causing the connecting hole block 117 to close the connecting block 122 again. At this time, fuel gas stops entering the inner filter cylinder 104. When the outward push ramp 116 is above the portion of the inner filter cylinder 104 without the semi-thick filter element 113, the slope of the outward push ramp 116 contacts the contact roller 121 of the connecting module located above the portion of the inner filter cylinder 104 without the semi-thick filter element 113, pushing the contact roller 121 and the connecting block 122. The through-hole block 117 and the outer sliding column 119 slide outward, and the sliding column spring 120 is compressed. At this time, the connecting hole 118 is connected to the connecting block 122. At this time, the fuel gas filtered in the inner filter cylinder 104 is discharged into the exhaust pipe 304, and then discharged from the discharge inner sleeve 303 and the outflow side pipe 102. When the outer push slope block 116 disengages from the contact roller 121 of the connecting module located above the part of the inner filter cylinder 104 where the half-thick filter element 113 is not installed, the sliding column spring 120 rebounds, causing the connecting hole block 117 to close the connecting block 122 again. At this time, the fuel gas stops being discharged. This process is repeated to achieve intermittent filtration and discharge of organic waste gas in the fuel gas.

[0055] When the top turntable 111 rotates, it drives the variable-diameter drum 112 to rotate via the central rotating column 115. When the large-diameter section of the variable-diameter drum 112 contacts the semi-thick filter element 113, it will squeeze the semi-thick filter element 113, making the adsorbent filling material inside the semi-thick filter element 113 absorb organic waste gas more evenly. The squeezing process changes the pore structure and flow channel distribution inside the semi-thick filter element 113. When the large-diameter section of the variable-diameter drum 112 periodically squeezes the semi-thick filter element 113, the adsorbent medium inside the filter element is subjected to external force and undergoes relative displacement and rearrangement. The gaps or uneven accumulation areas that may have existed before are compacted and filled, making the medium distribution more uniform. The dense and uniform distribution eliminates preferential channels for gas flow, forcing the fuel gas to make more thorough contact with the adsorption medium as it passes through the semi-thick filter element 113. This avoids local overflow or short-circuiting, thereby improving the overall adsorption efficiency. Simultaneously, the compressibility of the semi-thick filter element 113 allows for the use of a higher packing density of thickened medium within the same volume. Because the semi-thick filter element 113 has a compressible elastic structure, it can be manufactured with a higher initial packing density to accommodate more adsorption medium. The compressibility also allows the semi-thick filter element 113 to adjust its internal space through compression after installation or during operation, providing deformation margin for high-density packing. The periodic extrusion action can further compact and activate the medium in this high-density filling state, making the contact between the originally tightly packed medium particles more sufficient. This results in a larger adsorption surface area and higher adsorption capacity under the same volume conditions, effectively extending the service life of the semi-thick filter element 113. At the same time, for the highly viscous mixture in petrochemical fuel gases, the continuous extrusion between the variable diameter drum 112 and the semi-thick filter element 113 diffuses the mixture within the semi-thick filter element 113. When the large diameter section of the variable diameter drum 112 extrudes the semi-thick filter element 113, a stress field is generated inside the semi-thick filter element 113, forcing the viscous mixture under pressure. The material migrates and permeates downwards to areas with lower surrounding pressure. When the compression is released, the filter element elastically recovers, further promoting the redistribution of the viscous material. The periodic compression and release action continuously pushes and disperses the viscous material that might have adhered to the surface of the semi-thick filter element 113 or blocked local pores into various parts of the filter element, avoiding excessive accumulation in a single location, thereby effectively preventing the semi-thick filter element 113 from clogging. When the small diameter section of the variable diameter rotating cylinder 112 moves to the side of the semi-thick filter element 113, the small diameter section of the variable diameter rotating cylinder 112 will not contact the semi-thick filter element 113. The transition rotating column 114 is used for the transition between the large diameter section and the small diameter section of the variable diameter rotating cylinder 112.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A gas filter for petrochemical applications, comprising an outer housing (101) and a filter mechanism for filtering fuel gas, characterized in that: The outer casing (101) is provided with a flow mechanism and a separation mechanism for collecting vapor in the fuel gas; The filtration mechanism includes an outflow side pipe (102) and an inflow side pipe (103) fixedly installed on the outer housing (101). An inner filter cylinder (104) is fixedly installed inside the outer housing (101). An inner mounting plate (105) is fixedly installed on the inner filter cylinder (104). Two communication modules are provided on the inner mounting plate (105). The communication module includes a communication connector (122) fixedly installed on the inner mounting plate (105). The communication connector (122) is provided with a through hole communicating with the inner filter cylinder (104). A circulation drive component (106) is fixedly installed on the inner mounting plate (105). A vertical drive shaft (108) is rotatably installed on the inner mounting plate (105). An upper drive wheel (109) is fixedly installed on the top of the vertical drive shaft (108). The separation mechanism includes a power housing (301) fixedly installed inside the outer housing (101), the power housing (301) is connected to an air intake pipe (318), and the outflow side pipe (102) is connected to an exhaust pipe (304).

2. A gas filter for petrochemical applications according to claim 1, characterized in that: The filtration mechanism further includes a central rotating column (115) rotatably installed inside the inner filter cylinder (104). A variable diameter rotating cylinder (112) is fixedly installed on the central rotating column (115). The variable diameter rotating cylinder (112) consists of a small diameter section and a large diameter section. A half-thickness filter element (113) is fixedly installed in half of the inner filter cylinder (104). The connecting block (122) for air intake is located above the half-thickness filter element (113) and is connected to the air intake pipe (318). The connecting block (122) for air exhaust is not located above the half-thickness filter element (113) and is connected to the exhaust pipe (304).

3. A gas filter for petrochemical applications according to claim 2, characterized in that: The filtration mechanism also includes a top turntable (111) fixedly installed on the top of the central rotating column (115). The vertical drive shaft (108) drives the top turntable (111) to rotate through the transmission component. The vertical drive shaft (108) drives the circulation drive component (106) through the transmission component. An outward push ramp (116) is fixedly installed on the top turntable (111), and the outward push ramp (116) is provided with a slope surface.

4. A gas filter for petrochemical applications according to claim 3, characterized in that: The communication module also includes an external sliding column (119) slidably mounted on the inner mounting plate (105). A communication hole block (117) is fixedly mounted on the external sliding column (119). A sliding column spring (120) is provided between the communication hole block (117) and the inner mounting plate (105). A communication hole (118) is provided on the communication hole block (117). When the external push ramp (116) does not push the communication hole block (117), the communication hole block (117) closes the through hole of the communication connector (122). When the external push ramp (116) pushes the communication hole block (117), the communication hole (118) communicates with the through hole of the communication connector (122).

5. A gas filter for petrochemical applications according to claim 1, characterized in that: The flow mechanism includes a feed inner cylinder (201) fixedly installed inside the inflow side pipe (103), an inlet connecting pipe (202) fixedly installed on the feed inner cylinder (201), the inlet connecting pipe (202) being connected to the power housing (301), and a return flow plate (203) fixedly installed at the end of the feed inner cylinder (201).

6. A gas filter for petrochemical applications according to claim 5, characterized in that: The flow mechanism also includes a fixed groove block (207) fixedly installed in the feed inner cylinder (201). Multiple air passages (210) are provided between the fixed groove block (207) and the inner wall of the feed inner cylinder (201). An inner blowing sleeve (205) is slidably installed in the fixed groove block (207). Multiple connecting side grooves (206) are provided on the side of the inner blowing sleeve (205). A sealing ring block (204) is fixedly installed on the inner blowing sleeve (205). Multiple outer sliding columns (208) are fixedly installed on the sealing ring block (204). The outer sliding columns (208) are slidably installed with the fixed groove block (207). A return spring (209) is provided between the sealing ring block (204) and the fixed groove block (207). In the initial state, the sealing ring block (204) does not contact the fixed groove block (207). After the sealing ring block (204) moves, it can close one end of the air passage (210).

7. A gas filter for petrochemical applications according to claim 1, characterized in that: The separation mechanism also includes an air intake cavity (308) disposed in the power housing (301). An eccentric rotating column (316) is rotatably installed in the air intake cavity (308). An eccentric rotating block (306) is fixedly installed on the eccentric rotating column (316). The eccentric rotating column (316) drives the upper transmission wheel (109) to rotate through a transmission component. Multiple rotating slide plates (307) are slidably installed on the eccentric rotating block (306). A spring is provided between the rotating slide plate (307) and the eccentric rotating block (306).

8. A gas filter for petrochemical applications according to claim 7, characterized in that: The separation mechanism also includes an outer fixing frame (310) fixedly installed inside the temporary storage cylinder (302), a one-way push block (309) is slidably installed on the outer fixing frame (310), and a one-way spring (311) is provided between the one-way push block (309) and the outer fixing frame (310).

9. A gas filter for petrochemical applications according to claim 8, characterized in that: The separation mechanism also includes a bottom cooler (305) fixedly installed inside the outer housing (101). An inner cooling sleeve (313) is fixedly installed on the outside of the inner filter cylinder (104). A cooling pipe is provided inside the inner cooling sleeve (313). One end of the circulation drive component (106) is connected to one end of the cooling pipe, and the other end of the cooling pipe is connected to the bottom cooler (305). The other end of the circulation drive component (106) is connected to the bottom cooler (305). An inner drain valve (314) is provided at the bottom of the inner filter cylinder (104). An inner drain pipe (315) is fixedly installed below the inner drain valve (314). The inner drain pipe (315) is connected to an external water pipe. A heat sink is provided at the bottom of the bottom cooler (305).

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