A filter for petrochemicals

Abstract

This application relates to a petrochemical filter for separation, and more specifically to the field of filter technology. It includes a housing, a top cover on the top surface of the housing, a pipe system on the outer surface of the housing, several filter devices for three-stage filtration inside the housing, a scraper for cleaning the outer surface of the filter devices inside the housing, an auxiliary mechanism for driving the outermost layer of the filter devices to rotate inside the housing, with the scraper fixed to the movable end of the auxiliary mechanism, and a floating mechanism for making the filter devices float up and down inside the housing. This application utilizes a filter screen, filter element two, and filter element three to form a highly efficient gradient filtration system. The filter screen is rotatable, undertaking the interception of large particulate impurities and effectively protecting the subsequent two precision filter elements. The centrifugal force generated when the filter screen rotates can throw the trapped heavier particles outwards, reducing the chance of impurities repeatedly passing through the filter screen.

Description

Technical Field

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

[0002] Petrochemical filters are key equipment used in the petrochemical industry to separate and purify liquid or gaseous media. Their core function is to remove pollutants such as solid particles, impurities, colloids, and moisture from the media through physical interception, adsorption, or deep filtration, thereby ensuring the stable operation of downstream processes and product quality.

[0003] In petrochemical production, fluid filtration is a crucial step in ensuring product quality and safe equipment operation. However, existing filter technologies have many limitations. For example, common backwash filters are insufficient to remove adhering substances when processing fluids containing viscous or fibrous impurities, resulting in poor cleaning performance. While scraper filters can handle some viscous impurities, their cleaning process is often discontinuous or has cleaning dead zones due to structural limitations, which can easily lead to localized clogging of the filter screen. Furthermore, when faced with pressure fluctuations or water hammer effects common in petrochemical processes, the rigid and fixed filter element sealing structure of these devices is prone to failure, or the precision filter element may be damaged due to overpressure, thus affecting production continuity. Summary of the Invention

[0004] To address the problem of filter elements being easily clogged by sticky particles due to their rigid fixation and being difficult to clean, this application provides a filter for petrochemical applications.

[0005] The petrochemical filter provided in this application adopts the following technical solution: A petrochemical filter includes a housing, a top cover on the top surface of the housing, a pipe assembly on the outer surface of the housing, a plurality of filter devices for three-stage filtration inside the housing, a scraper for cleaning the outer surface of the filter devices inside the housing, an auxiliary mechanism for driving the outermost layer of the filter devices to rotate inside the housing, and the scraper is fixed to the movable end of the auxiliary mechanism inside the housing. A floating mechanism for making the filter devices float up and down is also provided inside the housing.

[0006] By adopting the above technical solution, the outer shell serves as the main frame of the entire petrochemical filter, providing installation and support space for various internal components while protecting the internal structure from the influence of the external environment. The top cover is located on the top surface of the outer shell, making it easy to open and close. It is used for maintenance, replacement of components, and other operations inside the filter, and also serves as a seal to prevent leakage of internal substances. The pipeline device is used to realize fluid transportation. Several filter devices are used for three-stage filtration of the raw material to be filtered. The scraper cleans the surface of the filter device under the drive of the auxiliary mechanism. The floating mechanism enables the filter device to have the ability to float up and down adaptively.

[0007] Preferably, the floating mechanism includes a pressure plate, the inside of which is rotatably provided with a threaded rod threadedly connected to the inside of the outer shell. Several fixed posts are fixedly provided on the bottom surface of the pressure plate. A fixed cylinder is slidably provided on the side of the fixed post away from the pressure plate. A pressing frame adapted to abut against the filter device is fixedly provided on the side of the fixed cylinder away from the fixed post. A return spring II is fixedly provided between the pressing frame and the pressure plate and sleeved on the outer surface of the fixed post and the fixed cylinder.

[0008] By adopting the above technical solution, the pressure plate, as the main component of the floating mechanism, is connected to the outer shell through a threaded rod. Under the action of the auxiliary mechanism, it moves up and down, driving the pressing frame to apply pressure or release pressure to the filter device, thereby realizing the floating of the filter device. The threaded rod is used to transmit the rotational power of the auxiliary mechanism, enabling the pressure plate to move up and down. The fixed column provides guidance for the up and down movement of the pressure plate, ensuring the stability of the pressure plate's movement. The fixed cylinder slides with the fixed column, providing support and guidance for the movement of the pressure plate, while simultaneously transmitting the pressure of the pressure plate to the pressing frame. The pressing frame abuts and fits against the filter device, applying pressure to the filter device under the action of the pressure plate, enabling the filter device to float up and down, enhancing the filtration effect. The second return spring is used to enable the pressing frame to quickly return to its original position when the pressure plate releases pressure, ensuring the normal operation of the floating mechanism.

[0009] Preferably, the auxiliary mechanism includes an auxiliary frame, a motor is fixedly installed inside the auxiliary frame, an L-shaped connecting pipe is fixedly installed inside the housing, a drive device located inside the L-shaped connecting pipe is installed at the output end of the motor, a connecting frame is fixedly installed inside the housing, a fixed circular plate is fixedly installed inside the connecting frame, an internal gear ring is rotatably installed inside the connecting frame and rotatably installed with the L-shaped connecting pipe, and a cleaning device is installed inside the connecting frame.

[0010] By adopting the above technical solution, the auxiliary frame provides installation space for the motor, fixes and protects the motor, and also serves as a support frame for other components of the auxiliary mechanism. The motor is the power source of the auxiliary mechanism, driving the drive device to work by outputting power, thereby driving the entire auxiliary mechanism to operate. The L-shaped connecting pipe connects the drive device at the output end of the motor and the internal gear ring, providing a channel for power transmission, and also playing a role in supporting and fixing related components. The drive device is used to drive the internal gear ring to rotate, and the connecting frame is used to ensure the stable operation of the entire auxiliary mechanism. The fixed circular plate provides an installation position for gear one, enabling gear one to rotate stably, while ensuring the normal meshing transmission between the internal gear ring and gear one. The internal gear ring rotates under the drive of the drive device, driving gear one, which meshes with it, to rotate, thereby driving the outermost layer of the filter device to rotate, realizing the dynamic filtration of the filter device, and the cleaning device performs the reciprocating motion of the scraper.

[0011] Preferably, the drive device includes a connecting column, on the side of the connecting column away from the motor a bevel gear set is fixedly disposed, and the side of the bevel gear set away from the connecting column is fixedly disposed on the bottom surface of the internal gear ring.

[0012] By adopting the above technical solution, the connecting column connects the motor output end and the bevel gear set, transmitting the rotational power of the motor to the bevel gear set. The bevel gear set is used to change the direction of power transmission, transmitting the power from the connecting column to the internal gear ring, driving the internal gear ring to rotate.

[0013] Preferably, the fixed circular plate has several gears that mesh with the internal gear ring inside, and a cylinder is fixedly installed inside the gear. A drain cylinder is installed inside the cylinder and passes through the internal gear ring. A return spring is symmetrically arranged inside the cylinder, and the filter device is installed inside the cylinder.

[0014] By adopting the above technical solution, gear one meshes with the internal gear ring and rotates under the drive of the internal gear ring. This rotation drives the outermost layer of the filter device to rotate through the cylinder, enhancing the filtration effect. Gear one is fixed inside the cylinder and houses the filter device, allowing the filter device to rotate with the rotation of the cylinder. At the same time, it provides installation space for the drain cylinder, which is installed through the internal gear ring to collect and discharge the purified liquid after each stage of filtration. The reset spring one is installed inside the cylinder and may be used to provide buffering and reset during the rotation or floating of the filter device, ensuring the stable operation of the filter device.

[0015] Preferably, the cleaning device includes a reciprocating lead screw, a sliding circular plate is slidably disposed on the outer surface of the reciprocating lead screw, the sliding circular plate is slidably disposed on the outer surface of the filter device, the scraper is fixedly disposed inside the sliding circular plate, and a protective sleeve is disposed between the bottom surface of the sliding circular plate and the bottom of the reciprocating lead screw.

[0016] By adopting the above technical solution, the reciprocating screw is the power transmission component of the cleaning device. By rotating, it drives the sliding circular plate to move up and down, thereby driving the scraper to clean the outer surface of the filter device. The sliding circular plate is used to fix the scraper and moves up and down with the rotation of the reciprocating screw to realize the cleaning action of the scraper on the outer surface of the filter device. The scraper is used to scrape off the impurities and dirt attached to the outer surface of the filter device, keep the filter device clean, and improve the filtration efficiency. The protective sleeve is used to prevent impurities from entering the interior of the reciprocating screw and also plays a certain buffering role.

[0017] Preferably, a second reciprocating screw is fixedly mounted on the top surface of the first reciprocating screw and rotatably mounted inside the housing. A second sliding circular plate is slidably mounted on the outer surface of the second reciprocating screw. An abutment plate for driving the filter device to move upward is fixedly mounted inside the second sliding circular plate. A second protective sleeve is provided between the top surface of the first sliding circular plate and the second sliding circular plate. A third protective sleeve is provided between the top surface of the second sliding circular plate and the top of the second reciprocating screw.

[0018] By adopting the above technical solution, the second reciprocating screw is fixedly connected to the first reciprocating screw and rotates synchronously, driving the second sliding circular plate to move up and down reciprocally, thus assisting in the floating operation of the filter device. The second sliding circular plate moves up and down with the rotation of the second reciprocating screw, and drives the filter device to move upward through the abutment plate. The abutment plate is used to drive the filter device to move upward, realizing the floating function of the filter device and enhancing the filtration effect. The second protective sleeve is used to prevent impurities from entering the space between the two sliding circular plates, and also plays a certain role in buffering and sealing. The third protective sleeve is used to prevent impurities from entering the top space of the second reciprocating screw, and also plays a certain role in buffering.

[0019] Preferably, the filtering device includes a first connecting seat, a filter screen is rotatably disposed inside the first connecting seat, a second connecting seat is threadedly disposed on the side of the filter screen away from the first connecting seat, and a post is symmetrically disposed on the bottom surface of the second connecting seat.

[0020] By adopting the above technical solution, connector one serves as the basic support component of the filtration device, providing installation positions for filter screen, filter element two, filter element three, etc., and playing the role of fixing and connecting other components. The filter screen is the first-stage filtration component of the filtration device, which can intercept larger particles of impurities and initially purify the liquid entering the filter. Connector two cooperates with connector one and fixes the filter screen through threaded connection, while also rotatingly connecting with filter element two and filter element three, which facilitates the assembly and disassembly of the filtration device and makes it easy to replace the filter screen and filter element. The insertion posts are symmetrically arranged on the bottom surface of connector two, which may be used for positioning or connecting with other components, enhancing the stability of the filtration device inside the filter.

[0021] Preferably, a filter element two, which is rotatably connected to a connecting seat two, is fixedly disposed inside the connecting seat one, and a filter element three, which is rotatably connected to a connecting seat two, is fixedly disposed inside the connecting seat one.

[0022] By adopting the above technical solution, filter element two, as the second-stage filtration component, further filters smaller particulate impurities and some suspended solids in the liquid, improving the purity of the liquid. Filter element three, as the third-stage filtration component, performs finer filtration of the liquid, removing tiny particles and impurities, ensuring that the final discharged liquid meets a high filtration standard.

[0023] Preferably, the piping device includes a water inlet pipe, a slag discharge pipe is fixedly installed on the outer surface of the housing, and a drain pipe is fixedly installed on the outer surface of the housing.

[0024] By adopting the above technical solution, the inlet pipe is the channel through which the petrochemical liquid to be filtered enters the filter, and the liquid to be processed is transported into the filter for filtration. The slag discharge pipe is used to discharge solid impurities and residues generated during the filtration process, keep the inside of the filter clean, and ensure the filtration effect. The drain pipe discharges the clean liquid after filtration from the filter and transports it to the subsequent use stage or storage device.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. A highly efficient gradient filtration system is constructed using filter screen, filter element two, and filter element three. The filter screen can rotate at a low speed, serving as the first line of defense and handling most of the large particulate impurities. This effectively protects the subsequent two precision filter elements. The centrifugal force generated when the filter screen rotates helps to throw the trapped heavier particles outward, causing them to settle along the shell and reducing the chance of impurities repeatedly passing through the filter screen. This achieves higher filtration efficiency and processing capacity within the same size, thus slowing down the clogging speed of the core filter element and extending its overall service life. At the same time, each of the three filter media performs its specific function, ensuring high final filtration accuracy while achieving a larger dirt holding capacity.

[0026] 2. A servo motor drives an internal gear ring, synchronously rotating the filter screen. Simultaneously, a reciprocating screw drives a sliding disc to move up and down. The outer surface of the sliding disc has several circular holes, which in turn cause a scraper to scrape the filter screen's outer surface, creating a three-dimensional cleaning trajectory. This mechanical scraping effectively removes sticky particles and entangled materials from the filter screen surface, preventing clogging. Compared to filters requiring shutdown for disassembly and cleaning, or equipment with only a single cleaning method, this design achieves online, continuous, and efficient automated cleaning, significantly reducing downtime and improving equipment uptime. The up-and-down movement of the sliding disc pushes small amounts of impurities to one side, where they are carried away during the scraper's next reverse movement, effectively preventing clogging of the scraper itself and ensuring the long-term stable operation of the cleaning system.

[0027] 3. The guide plate moves up and down within the outer casing, and the abutment plate drives the filter device to move up and down within the cylinder, compressing the first and second return springs. This enhances the relative movement between the filter device and the liquid, improving the filtration effect and making the filtration more thorough. Simultaneously, the two return springs together form a bidirectional buffer system. On one hand, they provide cushioning force when the filter device floats up or down, preventing damage from excessive instantaneous impact and extending its service life. On the other hand, they make the filter device move more smoothly and gently during floating, reducing vibration and noise, ensuring the overall stability of the filter's operation, and improving the equipment's performance and reliability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the internal structure of the outer shell of this application; Figure 3 This is a partial exploded view of the structure in this application; Figure 4 This is a schematic diagram of the filter connection structure in this application; Figure 5 This is a schematic diagram of the internal structure of the L-shaped connecting pipe in this application; Figure 6 This is a schematic diagram of the reciprocating lead screw connection structure of this application; Figure 7 For the purposes of this application Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the threaded rod connection structure in this application; Figure 9 For the purposes of this application Figure 8 Enlarged schematic diagram of the structure at point B.

[0029] Reference numerals: 1. Outer shell; 2. Top cover; 31. Water inlet pipe; 32. Slag discharge pipe; 33. Drain pipe; 4. Filter device; 41. Connecting seat one; 42. Connecting seat two; 43. Insert post; 44. Filter screen; 45. Filter element two; 46. Filter element three; 5. Auxiliary mechanism; 51. Auxiliary frame; 52. Motor; 53. L-shaped connecting pipe; 54. Connecting column; 55. Bevel gear set; 56. Internal gear ring; 57. Connecting frame; 58. Gear one; 59. Cylinder; 510. Drainage cylinder; 511. Return spring 1; 512. Reciprocating lead screw 1; 513. Sliding circular plate 1; 514. Protective sleeve 1; 515. Protective sleeve 2; 516. Reciprocating lead screw 2; 517. Sliding circular plate 2; 518. Protective sleeve three; 519. Abutment plate; 520. Fixing round plate; 6. Floating mechanism; 61. Pressure plate; 62. Threaded rod; 63. Fixed column; 64. Fixed cylinder; 65. Pressing frame; 66. Return spring II 7. Scraper. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0031] This application discloses a filter for petrochemical applications.

[0032] Reference Figure 1 , Figure 2 A petrochemical filter includes a housing 1. A top cover 2 is fixedly connected to the top surface of the housing 1 by several bolts. A pipe system is provided on the outer surface of the housing 1, including a water inlet pipe 31, which is fixedly connected to and communicates with the upper part of the outer surface of the housing 1. The outer surface of the housing 1 is fixedly connected to and communicates with a slag discharge pipe 32, which is located below the water inlet pipe 31. An adsorption device can be provided on the side of the slag discharge pipe 32 away from the housing 1 to absorb waste residue inside the housing 1. The bottom of the outer surface of the housing 1 is fixedly connected to and communicates with a drain pipe 33, which is located on the side away from the water inlet pipe 31. Several filter devices 4 are provided inside the housing 1 to achieve three-stage filtration. Each filter device 4 includes a connecting seat 1 41, the bottom surface of which is rotatably connected to a filter screen 44. One side of the filter screen 44 is threadedly connected to a connecting seat 2 42. 42 is located on the side away from the first connecting seat 41. Two inserts 43 are fixedly connected to the bottom surface of the second connecting seat 42. The two inserts 43 are symmetrically arranged. The inner wall of the first connecting seat 41 is fixedly connected to the second filter element 45. The second filter element 45 is rotatably connected to the inner wall of the second connecting seat 42. The inner wall of the first connecting seat 41 is fixedly connected to the third filter element 46. The third filter element 46 is rotatably connected to the inner wall of the second connecting seat 42. The inner walls of the first connecting seat 41, the second connecting seat 42 and the third filter element 46 are connected and form a tubular gap to facilitate the discharge of clean fluid. A scraper 7 is provided inside the outer shell 1. The scraper 7 is used to clean the outer surface of the filter device 4. An auxiliary mechanism 5 is provided inside the outer shell 1. The auxiliary mechanism 5 is used to drive the outermost layer of the filter device 4 to rotate. The scraper 7 is fixed at the movable end of the auxiliary mechanism 5. A floating mechanism 6 is provided inside the outer shell 1. The floating mechanism 6 is used to realize the up and down floating of the filter device 4.

[0033] In use, the raw material to be filtered is input into the interior of the outer shell 1 through the water inlet pipe 31. The raw material is filtered through several filter devices 4 in a three-stage progressive filtration process. During this process, the auxiliary mechanism 5 synchronously drives the filter screen 44 to rotate and drives the scraper 7 to perform cleaning operations. At the same time, the floating mechanism 6 makes the filter device 4 float up and down according to the changes in fluid pressure, realizing adaptive adjustment. The filtered clean fluid flows into the bottom of the outer shell 1 through the tubular gaps in the inner wall of the filter element 46 and flows out through the drain pipe 33 to be discharged to the next process stage, forming a continuous production process. Impurities are periodically removed from the slag discharge pipe 32.

[0034] Reference Figure 5 — Figure 7 The auxiliary mechanism 5 includes an auxiliary frame 51, which is fixedly connected to the bottom of the outer surface of the housing 1. The inner wall of the auxiliary frame 51 is fixedly connected to the fixed end of the motor 52. The bottom of the inner wall of the housing 1 is fixedly connected to an L-shaped connecting pipe 53. The output end of the motor 52 is provided with a drive device located inside the L-shaped connecting pipe 53. The drive device includes a connecting post 54, which is fixedly connected to the output end of the motor 52 and rotatably connected through the housing 1. One side of the connecting post 54 is fixedly connected to a bevel gear set 55, which is located on the side away from the motor 52. One side of the bevel gear set 55 is fixedly connected to the bottom surface of an internal gear ring 56, which is located on the side away from the connecting post 54. The bottom surface of the internal gear ring 56 is hollowed out to avoid affecting the discharge of clean fluid. The bottom of the inner wall of the housing 1 is fixed to a connecting frame 57. The center of the surface is fixedly connected to the fixed circular plate 520. The fixed circular plate 520 is convex in shape, and the internal gear ring 56 is located at the bottom of the fixed circular plate 520. The eccentric part of the bottom surface of the inner wall of the fixed circular plate 520 is rotatably connected to several gears 58, and the gears 58 mesh with the internal gear ring 56. The top surface of the inner wall of the gears 58 is fixedly connected to the cylinder 59. The cylinder 59 has two insertion holes, which are symmetrically designed and are compatible with the insertion post 43. The insertion holes are deep enough to allow the insertion post 43 to slide up and down inside. The center of the inner wall of the cylinder 59 is fixedly connected to the drain cylinder 510. The top surface of the inner wall of the cylinder 59 is fixedly connected to two return springs 511. The two return springs 511 are symmetrically arranged and can abut against the connecting seat 42. The filter device 4 is located inside the cylinder 59.

[0035] In use, the motor 52 is started, and the output shaft of the motor 52 drives the connecting column 54 to rotate. The vertical axis rotation is converted into horizontal axis rotation through the bevel gear set 55, which ultimately drives the internal gear ring 56 to rotate around its axis. The internal gear ring 56 rotates within the connecting frame 57. When the internal gear ring 56 rotates, it drives multiple gears 58 that mesh with it to rotate synchronously. The rotation of gears 58 drives the cylinder 59 to rotate, which in turn drives the insert column 43 and filter screen 44 to rotate through the insertion hole. The centrifugal force generated when the filter screen 44 rotates helps to throw the heavier particles that have been trapped outward, causing them to settle along the shell. This reduces the chance of impurities repeatedly passing through the filter screen 44, thereby achieving higher filtration efficiency and processing capacity within the same size. The filtered fluid is then guided out through the drain cylinder 510.

[0036] Reference Figure 6 The connecting frame 57 is equipped with a cleaning device, which includes a reciprocating screw 512. The reciprocating screw 512 is rotatably connected to the connecting frame 57 and the fixed circular plate 520, and is connected to the center point of the bevel gear set 55. The outer surface of the reciprocating screw 512 is slidably connected to the sliding circular plate 513. The sliding circular plate 513 has several circular holes inside, the number of which is the same as the number of filter devices 4, and the diameter of the circular holes is larger than the diameter of the filter devices 4, so that the sliding circular plate 513 can filter... The outer surface of the device 4 moves up and down reciprocally. The scraper 7 is fixedly connected to the inner wall of the circular hole. The scraper 7 can be driven to clean the outer surface of the filter screen 44 by the up and down movement of the sliding circular plate 513. The bottom surface of the sliding circular plate 513 is fixedly connected to the protective sleeve 514. The side of the protective sleeve 514 away from the sliding circular plate 513 is rotatably connected to the bottom groove of the reciprocating screw 512, so that the protective sleeve 514 will not rotate with the rotation of the reciprocating screw 512, and the bottom position of the protective sleeve 514 remains stationary.

[0037] In use, the bevel gear set 55 converts the vertical axis rotation into the horizontal axis rotation, which in turn drives the reciprocating screw 512 to rotate. The rotation of the reciprocating screw 512 drives the sliding circular plate 513 to make regular reciprocating motion along the axial direction. The scraper 7 fixed on it scrapes up and down on the outer surface of the filter device 4 to clean the filter screen 44. At this time, the protective sleeve 514 and the protective sleeve 515 maintain a dynamic sealing state during the movement.

[0038] Reference Figure 6The top surface of reciprocating screw 512 is fixedly connected to reciprocating screw 516, and reciprocating screw 516 is rotatably connected to the inside of housing 1 via an auxiliary plate. The outer surface of reciprocating screw 516 is slidably connected to sliding circular plate 517. Several circular holes 517 are provided inside the sliding circular plate 517, the number of which is the same as the number of filter devices 4, and the diameter of the circular holes 517 is larger than the diameter of the filter devices 4, allowing the sliding circular plate 513 to reciprocate up and down on the outer surface of the filter devices 4. An abutment plate 519 is fixedly connected inside the circular holes 513, and the abutment plate 519... The diameter is larger than the filter screen 44 and smaller than the connecting seat 41. That is, when the sliding circular plate 517 moves up and down, the connecting seat 41 can be moved up and down through the abutment plate 519, thereby moving the filter device 4. The top surface of the sliding circular plate 513 is fixedly connected to the protective sleeve 515. The side of the protective sleeve 515 away from the sliding circular plate 513 is fixedly connected to the sliding circular plate 517. The top surface of the sliding circular plate 517 is fixedly connected to the protective sleeve 518. The side of the protective sleeve 518 away from the sliding circular plate 517 rotates to the top groove of the reciprocating screw 516.

[0039] During use, the second reciprocating screw 516 rotates synchronously with the first reciprocating screw 512, driving the second sliding circular plate 517 to move up and down. Through the abutment plate 519, it pushes the first connecting seat 41, thereby driving the filter device 4 to float up and down. At this time, the second protective sleeve 515 and the third protective sleeve 518 provide dynamic sealing in different movement ranges.

[0040] Reference Figures 8-9 The floating mechanism 6 includes a pressure plate 61, which abuts against the inner wall of the outer casing 1. The center of the inner wall of the pressure plate 61 is rotatably connected to a threaded rod 62, which is threadedly connected to an auxiliary plate that is rotatably connected to the reciprocating screw 516 and the inner wall of the outer casing. The bottom surface of the pressure plate 61 is fixedly connected to several fixed posts 63, which are arranged in a circumferential array and are the same number as the filter device 4. One side of each fixed post 63 is slidably connected to a fixed cylinder 64, which is located away from the pressure plate. On one side of 61, one side of the fixing cylinder 64 is fixedly connected to the pressing frame 65. The pressing frame 65 is located on the side away from the fixing post 63. The pressing frame 65 abuts against the top surface of the connecting seat 41 and is fitted with a rubber gasket inside the pressing frame 65 to ensure sealing. The top surface of the pressing frame 65 is fixedly connected to the second return spring 66. The side of the second return spring 66 away from the pressing frame 65 is fixedly connected to the bottom surface of the pressure plate 61 and the second return spring 66 is sleeved on the outer surface of the fixing post 63 and the fixing cylinder 64.

[0041] During use, the sliding circular plate 517 moves up and down, which in turn moves the abutment plate 519, thereby causing the entire filter device 4 to move up and down. At this time, the return spring 511 and the return spring 66 together form a bidirectional buffer system, which enhances the relative movement between the filter device 4 and the liquid, improves the filtration effect, and makes the filtration more thorough. At the same time, it can provide buffering force when the filter device 4 floats up or down, avoiding damage to the filter device 4 due to excessive instantaneous impact force and extending its service life. On the other hand, it can make the movement of the filter device 4 more stable and gentle during the floating process, reduce vibration and noise, ensure the overall stability of the operation of the filter device 4, and improve the working performance and reliability of the equipment.

[0042] Among them, scraper 7 is made of polytetrafluoroethylene, and both sliding circular plate 513 and sliding circular plate 517 are equipped with ball bearings and reversing devices. Filter screen 44 can be configured as a wedge-shaped filter (coarse filter layer): filtration accuracy 20-50μm, high pressure resistance (≥10MPa), suitable for high-pressure conditions; Filter element 45 can be configured as a metal felt (fine filter layer): filtration accuracy 5-20μm, fiber structure intercepts tiny particles, strong anti-clogging ability; Filter element 46 can be a powder sintered filter element (final filter layer): filtration accuracy 1-5μm, made of ceramic or stainless steel powder sintering, high temperature resistance (≤600℃), corrosion resistance. Motor 52 is an explosion-proof geared motor with a power of 750W. Its protection level is IP65 and its explosion-proof level is Exd IIB T4 to meet the requirements of petrochemical environment. The output shaft of motor 52 is connected to a worm gear reducer. The wiring of motor 52 is set inside the auxiliary frame 51. Protective sleeve 1 514, protective sleeve 2 515, and protective sleeve 3 518 adopt Glyd rings or Step seals with dustproof lips. The sealing ring material is polytetrafluoroethylene (PTFE) filled with carbon fiber, and the O-ring material is fluororubber (FKM). At the part where the reciprocating screw 512 passes through the housing, a stuffing box structure with a pressure cap is adopted. The stuffing is flexible graphite or expanded polytetrafluoroethylene (ePTFE) braided stuffing. In this device, the return spring 511 and the return spring 66 both use the calculation formula for alloy springs: F=kx, where F is the external force on the spring, k is the spring constant, and x is the deformation of the spring, in meters. The elastic force of the alloy spring is then calculated so that it can be used in this device.

[0043] The implementation principle of a petrochemical filter according to an embodiment of this application is as follows: After the equipment is started, the fluid to be treated enters the housing 1 through the inlet pipe 31. It first undergoes primary coarse filtration through the rotating filter screen 44, where large particles are trapped. Subsequently, the fluid passes through filter element 2 45 and filter element 3 46 for secondary and tertiary precision filtration. The clean fluid finally collects through the tubular gap formed by connecting seat 1 41, connecting seat 2 42, and filter element 3 46, and is discharged through the drain pipe 33. During this process, the motor 52 drives the internal gear ring 56 to rotate through the connecting column 54 and bevel gear set 55, which in turn drives gear 1 58 and cylinder 59 to continuously rotate the filter screen 44. Simultaneously, the bevel gear set 55 drives reciprocating screw 1 512 and reciprocating screw 2 512. Rotation 16 causes the sliding circular plate 513 and scraper 7 to move up and down, cleaning the outer surface of the rotating filter screen 44. At the same time, the sliding circular plate 517 moves up and down, which can drive the abutment plate 519 to move together, thereby causing the entire filter device 4 to float up and down. At this time, the return spring 511 and the return spring 66 together form a two-way buffer system. The whole process realizes the unity of continuous filtration, automatic cleaning and pressure adaptive adjustment, significantly improving the stability and reliability of equipment operation. Protective sleeve 514, protective sleeve 515 and protective sleeve 518 ensure the effective sealing of each moving part, so that the filter can maintain efficient and stable operation.

[0044] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filter for petrochemicals, characterized by: Includes an outer shell (1), a top cover (2) is provided on the top surface of the outer shell (1), a pipe device is provided on the outer surface of the outer shell (1), a number of filter devices (4) for three-stage filtration are provided inside the outer shell (1), a scraper (7) for cleaning the outer surface of the filter device (4) is provided inside the outer shell (1), an auxiliary mechanism (5) for driving the outermost layer of the filter device (4) to rotate is provided inside the outer shell (1), and the scraper (7) is fixed at the movable end of the auxiliary mechanism (5). A floating mechanism (6) for realizing the up and down floating of the filter device (4) is provided inside the outer shell (1).

2. A filter for petrochemicals according to claim 1, characterized in that: The floating mechanism (6) includes a pressure plate (61). The pressure plate (61) is rotatably provided with a threaded rod (62) threadedly connected to the inside of the outer shell (1). Several fixed posts (63) are fixedly provided on the bottom surface of the pressure plate (61). A fixed cylinder (64) is slidably provided on the side of the fixed post (63) away from the pressure plate (61). A pressing frame (65) that abuts and matches the filter device (4) is fixedly provided on the side of the fixed cylinder (64) away from the fixed post (63). A second return spring (66) is fixedly provided between the pressing frame (65) and the pressure plate (61) and sleeved on the outer surface of the fixed post (63) and the fixed cylinder (64).

3. A filter for petrification according to claim 1, characterized in that: The auxiliary mechanism (5) includes an auxiliary frame (51), a motor (52) is fixedly installed inside the auxiliary frame (51), an L-shaped connecting pipe (53) is fixedly installed inside the outer shell (1), a drive device located inside the L-shaped connecting pipe (53) is provided at the output end of the motor (52), a connecting frame (57) is fixedly installed inside the outer shell (1), a fixed circular plate (520) is fixedly installed inside the connecting frame (57), an internal gear ring (56) is rotatably installed inside the connecting frame (57) and rotates with the L-shaped connecting pipe (53), and a cleaning device is provided inside the connecting frame (57).

4. A filter for petrochemicals according to claim 3, characterized in that: The drive device includes a connecting column (54), on the side of the connecting column (54) away from the motor (52) a bevel gear set (55) is fixedly provided, and the side of the bevel gear set (55) away from the connecting column (54) is fixedly provided on the bottom surface of the internal gear ring (56).

5. A filter for petrochemicals according to claim 4, characterized in that: The fixed circular plate (520) is rotatably equipped with several gears (58) that mesh with the internal gear ring (56). A cylinder (59) is fixedly installed inside the gear (58). A drain cylinder (510) is installed inside the cylinder (59) and passes through the internal gear ring (56). A return spring (511) is symmetrically arranged inside the cylinder (59). The filter device (4) is installed inside the cylinder (59).

6. A filter for petrochemicals according to claim 3, characterized in that: The cleaning device includes a reciprocating lead screw (512), a sliding circular plate (513) is slidably disposed on the outer surface of the reciprocating lead screw (512), the sliding circular plate (513) is slidably disposed on the outer surface of the filter device (4), the scraper (7) is fixedly disposed inside the sliding circular plate (513), and a protective sleeve (514) is disposed between the bottom surface of the sliding circular plate (513) and the bottom of the reciprocating lead screw (512).

7. A filter for petrochemicals according to claim 6, characterized in that: The top surface of the reciprocating screw 1 (512) is fixedly provided with a reciprocating screw 2 (516) which is rotatably provided inside the outer shell (1). The outer surface of the reciprocating screw 2 (516) is slidably provided with a sliding circular plate 2 (517). The inside of the sliding circular plate 2 (517) is fixedly provided with an abutment plate (519) for driving the filter device (4) to move upward. The top surface of the sliding circular plate 1 (513) and the sliding circular plate 2 (517) are provided with a protective sleeve 2 (515). The top surface of the sliding circular plate 2 (517) and the top of the reciprocating screw 2 (516) are provided with a protective sleeve 3 (518).

8. The filter for petrochemicals according to claim 1, characterized in that: The filter device (4) includes a first connecting seat (41), a filter screen (44) is rotatably disposed inside the first connecting seat (41), a second connecting seat (42) is threaded on the side of the filter screen (44) away from the first connecting seat (41), and a post (43) is symmetrically disposed on the bottom surface of the second connecting seat (42).

9. A filter for petrochemicals according to claim 8, characterized in that: The first connecting seat (41) is fixedly provided with a filter element two (45) that is rotatably connected to the second connecting seat (42), and the first connecting seat (41) is fixedly provided with a filter element three (46) that is rotatably connected to the second connecting seat (42).

10. The filter for petrochemicals according to claim 1, characterized in that: The pipeline device includes an inlet pipe (31), a slag discharge pipe (32) is fixedly installed on the outer surface of the outer shell (1), and a drain pipe (33) is fixedly installed on the outer surface of the outer shell (1).

Images