A stripping device for waste caustic recovery

Abstract

The present application relates to the technical field of petroleum refining equipment, and specifically relates to a stripping device for waste alkali slag recovery, which comprises a stripping tower body, a feeding pipe and a gas outlet are arranged on the top of the stripping tower body, a gas inlet pipe and a discharging pipe are arranged on the bottom of the stripping tower body, a buffer device, a filtering device and a stirring device are arranged in the stripping tower body, wherein the buffer device comprises a motor, a transmission shaft, a first baffle, a second baffle, a third baffle, a fan blade and a connecting shaft, the motor is fixedly installed on the top of the stripping tower body, the transmission shaft is rotatably installed on the inner wall of the stripping tower body, and a first reciprocating thread groove is formed on the outer side of the transmission shaft. The first baffle and the second baffle can preliminarily buffer the waste alkali slag liquid, increase the contact time of the liquid and water vapor, thereby improving the extraction rate, and meanwhile, the liquid is dispersed by the fan blade, the contact area of the liquid and water vapor is increased, and the overall extraction efficiency can be better improved.

Description

Technical Field

[0001] This invention relates to the field of petroleum refining equipment technology, and in particular to a stripping device for the recovery of waste alkali residue. Background Technology

[0002] A stripping unit for waste alkali residue recovery is a device used to recover useful components from waste alkali residue. Especially in some industrial processes, alkaline waste residue often contains important chemical substances. If these substances are not effectively recovered, it not only wastes resources but may also pollute the environment. Therefore, waste alkali residue recovery technology is of great significance for resource reuse, environmental protection, and the economic benefits of enterprises. In petroleum refining processes, waste alkali residue generated by FCC and DCC units cannot be properly utilized, and large quantities of it accumulate. Most of this accumulated waste alkali residue is treated as hazardous waste, which is costly. Meanwhile, existing stripping units consume a lot of steam, hindering their widespread adoption and failing to meet market demands.

[0003] The prior art discloses a stripping device with announcement number CN208327450U that can recycle waste alkali residue and save stripping steam. Through the set waste alkali residue skid-mounted system, the waste alkali residue generated by FCC and DCC can be effectively used to supply the stripping device as an additive, reduce the ammonia nitrogen content in the purified water at the bottom of the stripping tower, achieve the purpose of recycling waste alkali residue, reduce the steam consumption of the stripping device, save the consumption of steam at the bottom of the stripping tower, improve efficiency, and facilitate the promotion and use of this stripping device.

[0004] However, the device still has the following problems: First, insufficient gas-liquid contact. If the gas-liquid contact area is not large enough or the contact time is insufficient, the extraction rate may decrease. At the same time, the gas-liquid reaction will produce fouling, which will corrode the inner wall of the stripping tower, causing damage to the stripping tower and increasing costs. Second, when water vapor reacts with liquid in the stripping tower, the water vapor distribution is uneven. If the steam is uneven, the waste alkali residue in some areas may not be able to fully contact the steam, thus reducing the extraction efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the background art by proposing a stripping device for the recovery of waste alkali residue.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A stripping device for recovering waste alkali residue includes a stripping tower body, with a feed pipe and an air outlet at the top of the stripping tower body, an air inlet pipe and a discharge pipe at the bottom of the stripping tower body, and a buffer device, a filter device and a stirring device inside the stripping tower body.

[0008] The buffer device includes a motor, a drive shaft, a first baffle, a second baffle, a third baffle, fan blades, and a connecting shaft. The motor is fixedly installed on the top of the stripping tower body. The drive shaft is rotatably installed on the inner wall of the stripping tower body. A first reciprocating threaded groove is formed on the outer side of the drive shaft. A first sliding groove is formed on the inner wall of the stripping tower body. The first baffle is slidably installed in the first sliding groove. The second baffle is slidably installed in the first sliding groove. The third baffle is slidably installed on the inner wall of the stripping tower body. Several fan blades are provided and fixedly installed on the outer side of the drive shaft. The connecting shaft is fixedly installed at the bottom of the first baffle and fixedly connected to the top of the second baffle. Both the first and second baffles are slidably connected to the outer side of the drive shaft. The drive shaft is fixedly connected to the output end of the motor.

[0009] The filtration device includes a No. 1 filter plate and a No. 1 scraper. The No. 1 filter plate is fixedly installed on the inner wall of the stripping tower body, and several No. 1 scrapers are provided and fixedly installed on the outside of the drive shaft.

[0010] The stirring device includes a steam pipe, a fixed shaft, a transmission pipe, a vent plate, a second ring, and stirring rods. The bottom end of the steam pipe is located inside the air inlet pipe, and the top end of the steam pipe is located inside the transmission shaft. The fixed shaft is fixedly installed on the top of the second filter plate. A vent groove is opened inside the transmission shaft. Two transmission pipes are symmetrically arranged and fixedly installed on the outside of the transmission shaft. The vent plate is fixedly installed at the bottom of the transmission pipe. Several air outlet holes are opened on the top of the vent plate. The second ring is slidably installed on the outside of the fixed shaft. Two stirring rods are symmetrically arranged and fixedly installed on the outside of the second ring. A third ring is sleeved on the outside of the two stirring rods at the end away from the second ring.

[0011] The steam pipe is fixedly connected to the fixed shaft, the transmission pipe is connected to the ventilation trough, and the ventilation plate is rotatably connected to the fixed shaft.

[0012] In the stripping device for recycling waste alkali residue described above, the filtration device further includes a collection box, a hydraulic telescopic rod, a sealing plate, a No. 1 ring, and a squeezing rod. Two collection boxes are provided and fixedly installed on the outside of the stripping tower body. The hydraulic telescopic rod is fixedly installed on the side of the corresponding collection box away from the stripping tower body. The output end of the hydraulic telescopic rod slides through the collection box. Two collection holes are opened on the outside of the stripping tower body. The sealing plate is inserted into the collection holes.

[0013] In the stripping device for recycling waste alkali residue described above, the telescopic end of the hydraulic telescopic rod is fixedly connected to the side of the sealing plate away from the No. 1 filter plate, the collection box is connected to the inner wall of the stripping tower body through the collection hole, and the drive shaft rotates through the No. 1 filter plate.

[0014] In the stripping device for recycling waste alkali residue described above, a first ring is fixedly installed on the outer side of the drive shaft, two symmetrical extrusion rods are fixedly installed on the outer side of the first ring, two symmetrical fixing plates are fixedly installed on the inner wall of the stripping tower body, sliding grooves are opened on the surface of the two fixing plates, sliding rods are slidably installed in the two sliding grooves, an arc-shaped block is fixedly installed on the top of the sliding rod, and a spring is fixedly installed on the outer side of the sliding rod between the arc-shaped block and the fixing plate, and a second filter plate is fixedly installed on the bottom of the inner wall of the stripping tower body.

[0015] Compared with existing technologies, the advantages of this invention are:

[0016] The No. 1 and No. 2 baffles can initially buffer the waste alkali residue liquid, increasing the contact time between the liquid and water vapor, thereby improving the extraction rate. At the same time, the fan blades disperse the liquid, increasing the contact area between the liquid and water vapor, which can further improve the overall extraction efficiency. The No. 1 reciprocating threaded groove drives the No. 1, No. 2, and No. 3 baffles to move back and forth, which can clean the inner wall of the stripping tower body, preventing scale buildup on the inner wall of the stripping tower body from corroding it, thus causing damage to the stripping tower body and increasing costs.

[0017] The No. 1 filter plate can filter out fixed particles of impurities in the liquid, improving the purity of waste alkali residue. It can also filter out the dirt after cleaning, preventing it from flowing back into the liquid. The No. 1 scraper cleans the surface of the No. 1 filter plate, preventing excessive impurities and dirt from clogging the surface, which could lead to liquid flow interruption and reduced efficiency. The collection box can collect impurities and dirt, improving the applicability of the No. 1 and No. 2 filter plates. At the same time, the arc-shaped block can impact the No. 1 filter plate, causing it to vibrate and further preventing clogging.

[0018] The transmission shaft drives the transmission pipe to rotate, which in turn drives the venting plate to rotate, ensuring that the water vapor is evenly distributed and fully contacts the waste alkali residue, thus improving efficiency. At the same time, the rotation of the venting plate cleans the second filter plate, preventing it from becoming clogged and preventing the waste alkali residue from flowing out. Simultaneously, the rotation of the transmission pipe drives the stirring rod to rotate, which agitates the liquid, allowing the water vapor to react better with the waste alkali residue. The rotation of the stirring rod also drives the second ring to rotate, which in turn drives the third ring to move back and forth, cleaning the inner wall of the stripping tower body and preventing scale buildup that could corrode the inner wall of the stripping tower body and cause damage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the stripping tower body of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the stripping tower body of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the first baffle of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the No. 1 filter plate of the present invention;

[0023] Figure 5 This is a cross-sectional view of the collection box structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the stripping tower body of the present invention;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the arc-shaped block of the present invention;

[0026] Figure 8 This is a schematic diagram of the planar structure of the ventilation plate of the present invention;

[0027] Figure 9 This is a three-dimensional structural diagram of the fixed shaft of the present invention;

[0028] Figure 10 This is a schematic diagram of the three-dimensional structure of the third ring of the present invention.

[0029] In the diagram: 1. Stripping tower body; 2. Feed pipe; 3. Air outlet; 4. Air inlet pipe; 5. Discharge pipe; 61. Motor; 62. Drive shaft; 63. No. 1 baffle; 64. No. 1 reciprocating threaded groove; 65. No. 2 baffle; 66. No. 3 baffle; 67. Fan blade; 68. Connecting shaft; 69. No. 1 chute; 71. No. 1 filter plate; 72. No. 1 scraper; 73. Collection hole; 74. Collection box; 7 5. Hydraulic telescopic rod; 76. Sealing plate; 77. Ring No. 1; 78. Extrusion rod; 79. Fixing plate; 710. Arc block; 711. Sliding rod; 712. Spring; 713. Filter plate No. 2; 81. Ventilation slot; 82. Steam pipe; 83. Fixing shaft; 84. Transmission pipe; 85. Ventilation plate; 86. Vent hole; 87. Ring No. 2; 88. Stirring rod; 89. Ring No. 3. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Reference Figures 1-10 A stripping device for recycling waste alkali residue includes a stripping tower body 1, a feed pipe 2 and an air outlet 3 at the top of the stripping tower body 1, an air inlet pipe 4 and a discharge pipe 5 at the bottom of the stripping tower body 1, and a buffer device, a filter device and a stirring device inside the stripping tower body 1.

[0033] The buffer device includes a motor 61, a drive shaft 62, a first baffle 63, a second baffle 65, a third baffle 66, fan blades 67, and a connecting shaft 68. The motor 61 is fixedly installed on the top of the stripping tower body 1. The drive shaft 62 is rotatably installed on the inner wall of the stripping tower body 1. A first reciprocating threaded groove 64 is opened on the outer side of the drive shaft 62. A first sliding groove 69 is opened on the inner wall of the stripping tower body 1. The first baffle 63 is slidably installed in the first sliding groove 69. The second baffle 65 is slidably installed in the first sliding groove 69. The third baffle 66 is slidably installed on the inner wall of the stripping tower body 1. Several fan blades 67 are provided and fixedly installed on the outer side of the drive shaft 62. The connecting shaft 68 is fixedly installed at the bottom of the first baffle 63 and fixedly connected to the top of the second baffle 65. The first baffle 63, the second baffle 65, and the third baffle 66 buffer and clean the inner wall of the stripping tower body 1, and the fan blades 67 rotate to disperse the waste alkali residue.

[0034] Both the first baffle 63 and the second baffle 65 are slidably connected to the outside of the drive shaft 62, and the drive shaft 62 is fixedly connected to the output end of the motor 61, which facilitates the reciprocating movement of the first baffle 63 and the second baffle 65.

[0035] The filtration device includes a first filter plate 71 and a first scraper 72. The first filter plate 71 is fixedly installed on the inner wall of the stripping tower body 1. Several first scrapers 72 are provided and fixedly installed on the outside of the drive shaft 62 to filter the waste alkali residue and filter the scraped dirt at the same time.

[0036] The stirring device includes a steam pipe 82, a fixed shaft 83, a transmission pipe 84, a vent plate 85, a second ring 87, and stirring rods 88. The bottom end of the steam pipe 82 is located inside the air inlet pipe 4, and the top end of the steam pipe 82 is located inside the drive shaft 62. The fixed shaft 83 is fixedly installed on the top of the second filter plate 713. A vent groove 81 is opened inside the drive shaft 62. Two transmission pipes 84 are symmetrically arranged and fixedly installed on the outside of the drive shaft 62. The vent plate 85 is fixedly installed at the bottom of the transmission pipe 84. Several air outlets 86 are opened on the top of the vent plate 85. The second ring 87 is slidably installed on the outside of the fixed shaft 83. Two stirring rods 88 are symmetrically arranged and fixedly installed on the outside of the second ring 87. A third ring 89 is sleeved on the outer side of the two stirring rods 88 away from the second ring 87. By rotating the vent plate 85, the steam can be evenly distributed. The stirring rods 88 can stir the waste alkali residue. At the same time, the third ring 89 can clean the inner wall of the stripping tower body 1.

[0037] The steam pipe 82 is fixedly connected to the fixed shaft 83, the transmission pipe 84 is connected to the venting groove 81, and the venting plate 85 is rotatably connected to the fixed shaft 83 to facilitate the rotation of the venting plate 85.

[0038] The filtration device also includes a collection box 74, a hydraulic telescopic rod 75, a sealing plate 76, a first ring 77, and a squeezing rod 78. Two collection boxes 74 are provided and fixedly installed on the outside of the stripping tower body 1. The hydraulic telescopic rod 75 is fixedly installed on the side of the corresponding collection box 74 away from the stripping tower body 1. The output end of the hydraulic telescopic rod 75 slides through the collection box 74. Two collection holes 73 are opened on the outside of the stripping tower body 1. The sealing plate 76 is inserted into the collection holes 73 to collect the filtered dirt and impurities, thereby improving the overall applicability.

[0039] The telescopic end of the hydraulic telescopic rod 75 is fixedly connected to the side of the sealing plate 76 away from the first filter plate 71. The collection box 74 is connected to the inner wall of the stripping tower body 1 through the collection hole 73. The drive shaft 62 rotates through the first filter plate 71, so that impurities can enter the collection box 74 through the collection hole 73.

[0040] A first ring 77 is fixedly installed on the outer side of the drive shaft 62. Two symmetrical extrusion rods 78 are fixedly installed on the outer side of the first ring 77. Two symmetrical fixing plates 79 are fixedly installed on the inner wall of the stripping tower body 1. Sliding grooves are opened on the surface of the two fixing plates 79. Sliding rods 711 are slidably installed in the two sliding grooves. An arc-shaped block 710 is fixedly installed on the top of the sliding rod 711. A spring 712 is fixedly installed on the outer side of the sliding rod 711 and between the arc-shaped block 710 and the fixing plate 79. A second filter plate 713 is fixedly installed at the bottom of the inner wall of the stripping tower body 1 to vibrate the first filter plate 71 and better prevent the first filter plate 71 from clogging.

[0041] Most existing technologies use multiple motors to drive buffering, filtering, and stirring. This invention uses a single motor 61 to drive the transmission shaft 62 to rotate, thereby driving buffering, filtering, and stirring. This greatly improves work efficiency, reduces energy consumption, and solves the problem of high energy consumption caused by the need for multiple motors in existing technologies.

[0042] The working principle and usage of this invention are explained in detail below: During use, waste alkali residue enters the stripping tower body 1 through the feed pipe 2. The waste alkali residue contacts the first baffle 63, then flows from the first baffle 63 to the second baffle 65, and then from the second baffle 65 to the third baffle 66, buffering the waste alkali residue and allowing it to fully react with the steam, thus improving working efficiency. Simultaneously, the motor 61 starts, driving the transmission shaft 62 to rotate, which in turn drives the fan blades 67. The rotating fan blade 67 evenly disperses the waste alkali residue, allowing it to react uniformly with water vapor and increasing the contact area between the water vapor and the waste alkali residue. Simultaneously, the rotating drive shaft 62 drives the first baffle 63 and the second baffle 65 to move back and forth via the reciprocating threaded groove. The reciprocating movement of the first baffle 63 drives the third baffle 66 to move back and forth via the connecting shaft 68, scraping and cleaning the inner wall of the stripping tower body 1 to prevent the waste alkali residue from reacting with water vapor to form scale and corrode the stripping tower body 1, thereby increasing costs.

[0043] The waste alkali residue continues to flow downwards within the stripping tower body 1 and comes into contact with the No. 1 filter plate 71. The No. 1 filter plate 71 filters impurities from the waste alkali residue. Simultaneously, the drive shaft 62 rotates, causing the No. 1 scraper 72 to rotate. The rotation of the No. 1 scraper 72 cleans impurities from the surface of the No. 1 filter plate 71, preventing clogging. At the same time, the rotation of the drive shaft 62 causes the No. 1 ring 77 to rotate. The rotation of the No. 1 ring 77 causes the extrusion rod 78 to rotate. The extrusion rod 78 rotates and comes into contact with the arc-shaped block 710, squeezing the arc-shaped block 710. The arc-shaped block 710 slides away from the No. 1 filter plate 71 under the extrusion force. When the extrusion rod 78... As the filter continues to rotate and disengage from the arc-shaped block 710, the arc-shaped block 710 is reset by the elastic force of the spring 712 and impacts the first filter plate 71, causing the first filter plate 71 to vibrate. This better prevents the first filter plate 71 from clogging, which would cause the waste alkali residue to stop flowing and reduce work efficiency. When there are too many impurities on the surface of the first filter plate 71, the hydraulic telescopic rod 75 is activated. The activation of the hydraulic telescopic rod 75 drives the sealing plate 76 to move. The movement of the sealing plate 76 releases the seal on the collection hole 73, and the impurities enter the collection box 74 through the collection hole 73, making it convenient for subsequent personnel to handle them centrally, thereby improving the applicability of the first filter plate 71.

[0044] Water vapor enters through water vapor pipe 82, then flows through venting groove 81 into transmission pipe 84, and then from transmission pipe 84 into venting plate 85, exiting through vent 86. Simultaneously, the drive shaft 62 rotates, causing transmission pipe 84 to rotate, which in turn causes venting plate 85 to rotate, which in turn causes vent 86 to rotate. This allows water vapor to react evenly and fully with the waste alkali residue, improving efficiency. At the same time, the rotation of transmission pipe 84 contacts and compresses the stirring rod 88, causing it to rotate under pressure, thus agitating the waste alkali residue at the bottom of the stripping tower body 1, allowing the water vapor to react more evenly and efficiently. The gas and waste alkali residue can react better. At the same time, the rotation of the stirring rod 88 drives the second ring 87 to rotate. The second ring 87 moves back and forth through the threaded groove. The reciprocating movement of the second ring 87 drives the third ring 89 to move back and forth. The reciprocating movement of the third ring 89 cleans the inner wall of the stripping tower body 1, preventing scale buildup and corrosion of the stripping tower body 1. The scraped dirt can be filtered through the second filter plate 713. At the same time, the rotation of the vent plate 85 can clean the surface of the second filter plate 713, preventing the second filter plate 713 from becoming clogged and affecting the discharge of waste alkali liquid from the discharge pipe 5.

[0045] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0046] 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 technology disclosed in 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 stripping device for waste caustic sludge recovery, comprising a stripping tower body, a feeding pipe and a gas outlet being arranged at the top of the stripping tower body, and a gas inlet pipe and a discharging pipe being arranged at the bottom of the stripping tower body, characterized in that: The stripping tower body is internally provided with a buffering device, a filtering device and a stirring device; The buffering device comprises a motor, a transmission shaft, a first baffle, a second baffle, a third baffle, a fan blade and a connecting shaft, the motor is fixedly installed at the top of the stripping tower body, the transmission shaft is rotatably installed on the inner wall of the stripping tower body, a first reciprocating thread groove is formed on the outer side of the transmission shaft, a first sliding groove is formed on the inner wall of the stripping tower body, the first baffle is slidably installed in the first sliding groove, the second baffle is slidably installed in the first sliding groove, the third baffle is slidably installed on the inner wall of the stripping tower body, the fan blade is provided with a plurality of fan blades and is fixedly installed on the outer side of the transmission shaft, the connecting shaft is fixedly installed at the bottom of the first baffle, and the connecting shaft is fixedly connected with the top of the second baffle. The first baffle and the second baffle are slidably connected with the outer side of the transmission shaft, and the transmission shaft is fixedly connected with the output end of the motor. The filtering device comprises a first filter plate and a first scraping rod, the first filter plate is fixedly installed on the inner wall of the stripping tower body, and the first scraping rod is provided with a plurality of first scraping rods and is fixedly installed on the outer side of the transmission shaft. The stirring device comprises a water vapor pipeline, a fixed shaft, a transmission pipeline, a ventilation plate, a second ring and a stirring rod, the bottom end of the water vapor pipeline is located in the air inlet pipe, the top end of the water vapor pipeline is located in the transmission shaft, the fixed shaft is fixedly installed at the top of the second filter plate, an air passage is formed in the transmission shaft, the transmission pipeline is symmetrically provided with two transmission pipelines and is fixedly installed on the outer side of the transmission shaft, the ventilation plate is fixedly installed at the bottom of the transmission pipeline, a plurality of air outlets are formed in the top of the ventilation plate, the second ring is slidably installed on the outer side of the fixed shaft, the stirring rod is symmetrically provided with two stirring rods and is fixedly installed on the outer side of the second ring, and a third ring is sleeved on the outer side of the end of the two stirring rods away from the second ring. The water vapor pipeline is fixedly penetrated through the fixed shaft, the transmission pipeline is communicated with the air passage, and the ventilation plate is rotatably connected with the fixed shaft.

2. A stripping apparatus for recovery of waste caustic sludge according to claim 1, characterized in that: The filtering device further comprises a collecting box, a hydraulic telescopic rod, a sealing plate, a first ring and an extrusion rod, the collecting box is provided with two collecting boxes and is fixedly installed on the outer side of the stripping tower body, the hydraulic telescopic rod is fixedly installed on the side of the corresponding collecting box away from the stripping tower body, the output end of the hydraulic telescopic rod is slidably penetrated through the collecting box, two collecting holes are formed on the outer side of the stripping tower body, and the sealing plate is inserted into the collecting holes.

3. A stripping apparatus for recovery of waste caustic sludge according to claim 2, characterized in that: The telescopic end of the hydraulic telescopic rod is fixedly connected with the side of the sealing plate away from the first filter plate, the collecting box is communicated with the inner wall of the stripping tower body through the collecting hole, and the transmission shaft is rotatably penetrated through the first filter plate.

4. A stripping apparatus for recovery of waste caustic sludge according to claim 3, characterized in that: A first ring is fixedly installed on the outer side of the transmission shaft, two symmetric extrusion rods are fixedly installed on the outer side of the first ring, two symmetric fixed plates are fixedly installed on the inner wall of the stripping tower body, sliding grooves are formed on the surfaces of the two fixed plates, sliding rods are slidably installed in the two sliding grooves, arc-shaped blocks are fixedly installed at the top of the sliding rods, springs are fixedly installed on the outer side of the sliding rods and between the arc-shaped blocks and the fixed plates, and a second filter plate is fixedly installed at the bottom of the stripping tower body.

Images