A VOCs treatment device and method for pharmaceutical and chemical production

Abstract

The present invention relates to the technical field of VOCs treatment, and particularly relates to a VOCs treatment device and method for pharmaceutical and chemical production. Its technical solution includes: a spiral replacement feeding device is provided between the tower body and the central cylinder. The spiral replacement feeding device includes a spiral installation structure fixed on the tower body and the central cylinder, and further includes a spiral material holding structure that can move within the spiral installation structure. By replacing the packing positions at different distribution heights, the present invention can greatly improve the utilization rate of the packing, and has a simple structure and convenient operation. It can quickly complete the packing replacement operation without the need for large-scale refilling of new packing, thus saving the time for cultivating biological membranes and improving the operation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of VOCs treatment, and particularly relates to a VOCs treatment device and method for pharmaceutical and chemical production. Background Technique

[0002] During the production process of pharmaceutical and chemical industries, various VOCs are generated. These compounds not only pollute the environment but also may pose hazards to human health. There are many existing ways to treat VOCs. Common current end-treatment technologies for industrial source VOCs pollution mainly fall into two categories: recovery technologies and destruction technologies. Recovery technologies include adsorption technology, absorption technology, condensation technology, membrane separation technology, etc.; destruction technologies mainly include thermal combustion technology, catalytic combustion technology, photocatalytic degradation technology, low-temperature plasma technology, and biodegradation technology, etc.

[0003] In the biodegradation technology, a biological scrubber is often used, which consists of a packing layer and a spraying system. During its use, the waste gas enters from the bottom of the tower, is treated through each packing layer, and finally the waste gas is discharged from the top of the tower. This operation mode will result in that, during long-term use, since the gas enters from the bottom of the tower, the gas first contacts the packing at the bottom of the tower, then the packing in the middle of the tower, and finally the packing at the top of the tower. Therefore, compared with the packing in the middle and at the top, the packing at the bottom will have a thicker biofilm and a higher gas-liquid mass transfer rate. After long-term use, compared with the packing in the middle and at the top, the packing at the bottom will first have problems of blockage and scaling, and at this time, the packing needs to be replaced.

[0004] The existing replacement method is to open the tower body, uniformly remove all the packing, and then fill new packing in the tower. However, this often causes the packing in the middle and at the top that can still be used to be replaced, thus resulting in a waste of resources. Moreover, the new packing also needs a period of biofilm cultivation before it can be used, so time is also wasted. Summary of the Invention

[0005] The purpose of the present invention is to propose a VOCs treatment device and method for pharmaceutical and chemical production in view of the problems existing in the background technique.

[0006] The technical solution of the present invention: A VOCs treatment device for pharmaceutical and chemical production includes a tower body and a central cylinder installed therein. The top of the tower body is an air outlet and the bottom is an air inlet. A spiral replacement feeding device is provided between the tower body and the central cylinder. The spiral replacement feeding device includes a spiral installation structure fixed on the tower body and the central cylinder, and also includes a spiral material holding structure that can move within the spiral installation structure;

[0007] The spiral mounting structure includes two spiral mounting arms respectively fixed on the tower body and the central cylinder. A spiral mounting groove is formed in the spiral mounting arm. The spiral material storage structure includes two spiral rubber arms respectively inserted into the spiral mounting grooves on both sides, and also includes a spiral air-permeable pad fixed between the two spiral rubber arms. A filler is laid on the spiral air-permeable pad. The filler is a light-weight filler. An inlet of the spiral material storage structure is provided at the top of the tower body where the spiral mounting structure penetrates, and an outlet of the spiral material storage structure is provided at the bottom of the tower body where the spiral mounting structure penetrates. After long-term use, the filler on the spiral air-permeable pad forms a new material area, a sub-new material area, and an old material area at the top, middle, and bottom of the tower body respectively;

[0008] A spiral moving groove is also formed in the spiral mounting arm. A rope cavity is formed in the spiral rubber arm. A traction rope is fixedly installed in the rope cavity. The length of the traction rope exposed outside the rope cavity is greater than the length of the spiral mounting groove. A moving block moves in the spiral moving groove, and a fixing hole for connecting the traction rope is formed.

[0009] Preferably, a material shaking device is provided between the spiral mounting structure and the spiral material storage structure. The material shaking device includes a spiral plate fixed between the two spiral mounting arms. A number of first convex heads are equidistantly distributed on the spiral plate at the old material area. The material shaking device also includes a spiral rubber plate fixed between the two spiral rubber arms. A number of second convex heads adapted to the first convex heads are equidistantly distributed on the spiral rubber plate.

[0010] Preferably, a unwinding box is fixedly installed at the bottom of the tower body. A winding rack for winding the spiral material storage structure is installed in the unwinding box. A feeding device is also installed in the unwinding box. A storage box is fixedly installed at the bottom of the tower body. A winding shaft for winding the spiral material storage structure is rotatably installed in the storage box.

[0011] Preferably, the winding rack includes a chassis rotatably installed at the bottom of the unwinding box, and support columns fixed on the chassis. A discharge port is fixedly installed and communicated at the bottom of the storage box. A motor for driving the winding shaft is fixed in the storage box. A number of cutting grooves are formed on one side of the spiral rubber arm close to the spiral moving groove.

[0012] Preferably, the feeding device includes an entrance and exit opened between the unwinding box and the tower body, and a feeding hopper fixed on the entrance and exit. The feeding hopper is provided with a feeding channel with a discharge port located in the entrance and exit. A first guiding roller is rotatably installed in the entrance and exit. An installation rack is fixedly installed on the unwinding box. A second guiding roller is rotatably installed on the installation rack. The spiral material storage structure enters the spiral mounting structure between the first guiding roller and the second guiding roller.

[0013] Preferably, a spiral water pipe is fixedly installed inside the central cylinder. A number of water outlets are provided on the spiral water pipe above the spiral air-permeable pad. A water delivery pipe with one end communicating with the spiral water pipe is also fixedly installed inside the central cylinder. A water tank is fixedly installed at the bottom of the tower body. A water pump is provided inside the water tank. The other end of the water delivery pipe is fixedly connected and communicated with the water outlet end of the water pump.

[0014] A method for treating VOCs in pharmaceutical and chemical production includes the following steps:

[0015] S1: Fix the traction ropes on both sides of the spiral rubber arm in two fixing holes respectively. Then pass the two moving blocks through the entrance and exit and put them into the spiral moving grooves at the inlet of the spiral material storage structure. The two moving blocks will slide down along the spiral moving grooves on both sides. The moving blocks drive the traction ropes to move from the top to the bottom of the spiral installation groove, and then are discharged from the spiral installation groove to the outlet of the spiral material storage structure.

[0016] S2: Pull the two moving blocks at the outlet of the spiral material storage structure, and manually remove the spiral material storage structure from the winding frame. Pass the spiral material storage structure through the entrance and exit, so that the spiral rubber arm is inserted into the spiral installation groove and moves inside it. Then pull one end of the traction rope and rotate the winding frame at the other end to put the spiral material storage structure into the tower body. The spiral material storage structure will enter the tower body between the first guide roller and the second guide roller.

[0017] S3: Input the filler into the feeding hopper. The filler will be output from the feeding channel to the moving spiral air-permeable pad. As the filler is continuously input into the feeding hopper, the spiral air-permeable pad passing through the entrance and exit and entering the tower body is evenly covered with the filler.

[0018] S4: As the spiral material storage structure is continuously put into the tower body by continuously pulling the traction rope and continuously rotating the winding frame, the spiral material storage structure will be completely installed between the two spiral installation arms. Then stop pulling the cutting groove and rotating the winding frame, and remove the traction rope from the fixing hole. Fix the two ends of the traction rope on the two ends of the winding shaft respectively, that is, the installation of the spiral material storage structure is completed.

[0019] S5: Start the water pump in the water tank to deliver water into the water delivery pipe, so that the water is discharged from the water outlet to each layer of the filler through the spiral water pipe. Input the waste gas into the air inlet through the air inlet pipe. The waste gas passes through each layer of the spiral air-permeable pad, and the VOCs are captured and degraded by the microorganisms on the filler. Finally, the treated waste gas is discharged through the air outlet pipe, and thus the waste gas treatment is completed.

[0020] S6: After the equipment is used for a long time, new material areas, sub-new material areas and old material areas are respectively formed at the top, middle and bottom of the tower body by the spiral air-permeable pad, and the filler needs to be replaced.

[0021] S7: Start the motor in the storage box to drive the winding shaft to rotate, so that the traction ropes fixed at both ends of the winding shaft are wound, pulling the spiral rubber arm out of the spiral mounting groove, and then the spiral air-permeable pad is pulled out, causing the spiral rubber arm and the spiral air-permeable pad to be wound onto the winding shaft. During the winding process, the filler on the spiral air-permeable pad will fall into the discharge port and be discharged;

[0022] S8: As the winding shaft continues to rotate, the filler in the old material area is discharged. Due to long-term use, the biofilm thickness of the filler in the sub-new material area is just right. As the spiral material storage structure continues to move, the filler in the sub-new material area enters the bottom of the tower to form usable filler. The filler in the new material area will enter the middle of the tower to form a new sub-new material area. Subsequently, the incoming spiral air-permeable pad is fed through the feeding device to form a new new material area, thus completing the replacement of the filler.

[0023] Compared with the existing technology, the beneficial effects of the present invention are as follows: Through the setting of the spiral alternating material replacement device, the filler is filled on the spiral material storage structure. The spiral material storage structure can be movably installed in the spiral mounting structure. After long-term use, the top, middle, and bottom of the tower body are respectively divided into a new material area, a sub-new material area, and an old material area. By moving the spiral material storage structure in the spiral mounting structure, the filler in the old material area will be discharged. At this time, due to long-term use, the biofilm thickness of the filler in the sub-new material area is just right, and new usable filler is formed through movement. Therefore, by replacing the filler positions at different distribution heights in this way, the utilization rate of the filler can be greatly improved, and the structure is simple, the operation is convenient, and the replacement operation of the filler can be quickly completed without the need for large-scale re-filling of new filler. Therefore, the time for cultivating the biofilm is saved, and the operation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic sectional structural diagram of the tower body of the present invention;

[0026] Figure 3 is a schematic structural diagram of the spiral alternating material replacement device of the present invention;

[0027] Figure 4 is Figure 3 the front view structural diagram of

[0028] Figure 5 is a schematic structural diagram of the material shaking device of the present invention;

[0029] Figure 6 is a schematic structural diagram of the spiral mounting structure of the present invention;

[0030] Figure 7 The structural schematic diagram of the spiral material storage structure of the present invention;

[0031] Figure 8 The structural schematic diagram of the spiral material storage structure of the present invention installed in the spiral installation structure;

[0032] Figure 9 The internal structural schematic diagram of the unwinding box of the present invention.

[0033] Reference numerals: 1, tower body; 2, water tank; 3, intake pipe; 4, exhaust pipe; 5, central cylinder; 6, spiral installation structure; 7, spiral material storage structure; 8, material shaking device; 9, unwinding box; 31, air inlet; 41, air outlet; 51, water delivery pipe; 52, spiral water pipe; 53, water outlet head; 61, spiral installation arm; 62, spiral installation groove; 63, spiral moving groove; 64, moving block; 65, fixing hole; 71, spiral rubber arm; 72, spiral air permeable pad; 73, cutting groove; 74, traction rope; 75, rope cavity; 81, spiral plate; 82, first convex head; 83, spiral rubber plate; 84, second convex head; 91, chassis; 92, support column; 93, entrance and exit; 94, feeding hopper; 95, material conveying channel; 96, first guide roller; 97, second guide roller; 98, mounting bracket; 100, storage box; 200, winding shaft; 300, discharge port. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] Refer to the attached Figures 1-9 , a VOCs treatment device for pharmaceutical and chemical production, including a tower body 1 and a central cylinder 5 installed therein. The top of the tower body 1 is an air outlet 41, and the bottom is an air inlet 31. A spiral alternating material replacement device is provided between the tower body 1 and the central cylinder 5. The spiral alternating material replacement device includes a spiral installation structure 6 fixed on the tower body 1 and the central cylinder 5, and further includes a spiral material storage structure 7 that can move within the spiral installation structure 6;

[0036] The spiral installation structure 6 includes two spiral installation arms 61 respectively fixed on the tower body 1 and the central cylinder 5. A spiral installation groove 62 is formed inside the spiral installation arm 61. The spiral material holding structure 7 includes two spiral rubber arms 71 respectively inserted into the spiral installation grooves 62 on both sides, and also includes a spiral air-permeable pad 72 fixed between the two spiral rubber arms 71. A filler is laid on the spiral air-permeable pad 72, and the filler is selected as a filler with light weight. At the top of the tower body 1 where the spiral installation structure 6 penetrates, there is an inlet of the spiral material holding structure 7, and at the bottom of the tower body 1 where the spiral installation structure 6 penetrates, there is an outlet of the spiral material holding structure 7. After long-term use, the filler on the spiral air-permeable pad 72 forms a new material area, a sub-new material area, and an old material area at the top, middle, and bottom of the tower body 1 respectively;

[0037] During the long-term use of the tower body 1, since the tower body 1 intakes air from the bottom, the gas first contacts the bottom filler of the tower body 1, then the middle filler, and finally the top filler. Therefore, compared with the middle and top fillers, the bottom filler will have a thicker biofilm and a higher gas-liquid mass transfer rate. After long-term use, due to the above advantages, the bottom filler shows that due to the thick biofilm and the abundance of moisture and nutrients, the biofilm grows excessively. Therefore, compared with the middle and top fillers, the bottom filler will first have problems of blockage and scaling. Therefore, through the distinction of the biofilm thickness and the problems of blockage and caking, the division of the new material area, the sub-new material area, and the old material area in this solution comes into being.

[0038] In this solution, the spiral air-permeable pad 72 is made of non-woven fabric material. The non-woven fabric is folded and sewn in multiple layers to form the spiral air-permeable pad 72.

[0039] A spiral moving groove 63 is also formed inside the spiral installation arm 61. A rope cavity 75 is formed inside the spiral rubber arm 71, and a traction rope 74 is fixedly installed in the rope cavity 75. The length of the traction rope 74 exposed outside the rope cavity 75 is greater than the length of the spiral installation groove 62. A moving block 64 moves in the spiral moving groove 63, and a fixing hole 65 for connecting the traction rope 74 is formed.

[0040] Fix the traction rope 74 in the fixing hole 65, and then put the moving block 64 into the spiral moving groove 63 and let it slide down smoothly, which will cause the traction rope 74 to move from the top to the bottom of the spiral installation groove 62. By pulling the traction rope 74, the spiral rubber arm 71 can be installed. It should be noted that the groove walls of the moving groove 63 and the spiral installation groove 62 are smooth enough, and lubricating oil can be used to improve the lubricity during use;

[0041] After long-term use, when the packing material in the old material area needs to be replaced, and at this time the packing material in the sub-new material area has just the right biofilm thickness due to long-term use, pulling the towing rope 74 again can pull the spiral rubber arm 71 out of the spiral installation groove 62, so that the spiral air-permeable pad 72 in the old material area is discharged from the tower body 1, and the sub-new material area moves to the bottom of the tower body 1 to become the available old material area.

[0042] Therefore, by replacing the packing positions at different distribution heights in this way, the utilization rate of the packing material can be greatly improved, and the structure is simple, the operation is convenient, and the replacement operation of the packing material can be completed quickly.

[0043] In this embodiment, a material shaking device 8 is provided between the spiral installation structure 6 and the spiral material holding structure 7. The material shaking device 8 includes a spiral plate 81 fixed between two spiral installation arms 61. A number of first convex heads 82 are equidistantly distributed on the spiral plate 81 at the old material area. The material shaking device 8 also includes a spiral rubber plate 83 fixed between two spiral rubber arms 71. A number of second convex heads 84 adapted to the first convex heads 82 are equidistantly distributed on the spiral rubber plate 83.

[0044] The middle part of the spiral air-permeable pad 72 can be supported by the spiral rubber plate 83 after being filled with packing material. And when the sub-new material area moves to the old material area at the bottom of the tower body 1, the second convex heads 84 will continuously collide with the first convex heads 82, causing the spiral air-permeable pad 72 to vibrate. As a result, the packing material in the sub-new material area can be shaken, and the slightly agglomerated packing material can be loosened again, so that it can be better used.

[0045] In this embodiment, the packing material can be organic packing materials such as wood chips and rice husks, or plastic packing materials and fiber packing materials, but it must be ensured that they are granular.

[0046] In addition, as Figure 1 shown, a reel box 9 is fixedly installed at the bottom of the tower body 1. A reel rack for winding the spiral material holding structure 7 is installed in the reel box 9. A feeding device is also installed in the reel box 9. A storage box 100 is fixedly installed at the bottom of the tower body 1. A reel shaft 200 for winding the spiral material holding structure 7 is rotatably installed in the storage box 100. The reel rack includes a chassis 91 rotatably installed at the bottom of the reel box 9 and support columns 92 fixed on the chassis 91. A discharge port 300 is fixedly connected to the bottom of the storage box 100. A motor for driving the reel shaft 200 is fixed in the storage box 100. A number of cutting grooves 73 are provided on one side of the spiral rubber arm 71 close to the spiral moving groove 63.

[0047] After the retraction rope 74 passes through the spiral mounting groove 62, by manually pulling the retraction rope 74 and manually rotating the winding frame, the material wound on the spiral material storage structure 7 will be unwound and installed onto the spiral mounting structure 6. After the spiral material storage structure 7 is installed, the retraction rope 74 is removed from the fixing hole 65 and fixed to the winding shaft 200. When the old material area is replaced, by driving the winding shaft 200 with a motor, the retraction rope 74 can pull the spiral rubber arm 71 to move. As it moves, the spiral material storage structure 7 is continuously wound up. At this time, the filler on the spiral air permeable pad 72 will fall into the discharge port 300 and be discharged. By opening the cutting groove 73, the spiral rubber arm 71 can be deformed smoothly, facilitating winding and entering the spiral mounting structure 6.

[0048] It should also be noted that the feeding device includes an entrance and exit 93 opened between the unwinding box 9 and the tower body 1, and a feeding hopper 94 fixed on the entrance and exit 93. The feeding hopper 94 is provided with a feeding channel 95 whose discharge port is located inside the entrance and exit 93. A first guiding roller 96 is rotatably installed inside the entrance and exit 93. An installation frame 98 is fixedly installed on the unwinding box 9, and a second guiding roller 97 is rotatably installed on the installation frame 98. The spiral material storage structure 7 enters the spiral mounting structure 6 between the first guiding roller 96 and the second guiding roller 97.

[0049] After the spiral material storage structure 7 wound on the winding frame enters the spiral mounting structure 6, by feeding materials into the feeding hopper 94, the filler will automatically fall onto the spiral air permeable pad 72 and enter the spiral mounting structure 6.

[0050] In addition, a spiral water pipe 52 is fixedly installed inside the central cylinder 5. A number of water outlets 53 are provided on the spiral water pipe 52 above the spiral air permeable pad 72. A water delivery pipe 51 is also fixed inside the central cylinder 5, with one end communicating with the spiral water pipe 52. A water tank 2 is fixedly installed at the bottom of the tower body 1. A water pump is provided inside the water tank 2. The other end of the water delivery pipe 51 is fixed and communicated with the water outlet end of the water pump. Starting the water pump to supply water into the water delivery pipe 51 will cause water to be discharged from the water outlets 53 to supply water to the filler.

[0051] The present invention also discloses a method for treating VOCs in pharmaceutical and chemical production, including the following steps:

[0052] S1: Fix the retraction ropes 74 on both sides of the spiral rubber arm 71 in two fixing holes 65 respectively. Then, pass the two moving blocks 64 through the entrance and exit 93 and put them into the spiral moving grooves 63 at the inlet of the spiral material storage structure 7. The two moving blocks 64 will slide down smoothly from the spiral moving grooves 63 on both sides. The moving blocks 64 drive the retraction ropes 74 to move from the top of the spiral mounting groove 62 to its bottom, and then be discharged from the spiral mounting groove 62 to the outlet of the spiral material storage structure 7.

[0053] S2: Pull the two moving blocks 64 at the outlet of the spiral material storage structure 7, manually remove the spiral material storage structure 7 from the winding frame, pass the spiral material storage structure 7 through the entrance and exit 93, so that the spiral rubber arm 71 is inserted into the spiral installation groove 62 and moves therein. Then, pull the traction rope 74 at one end and rotate the winding frame at the other end to put the spiral material storage structure 7 into the tower body 1. The spiral material storage structure 7 will enter the tower body 1 between the first guide roller 96 and the second guide roller 97;

[0054] S3: Input the filler into the feeding hopper 94. The filler will be output from the feeding channel 95 onto the moving spiral air-permeable pad 72. As the filler is continuously input into the feeding hopper 94, the spiral air-permeable pad 72 entering the tower body 1 through the entrance and exit 93 is evenly covered with the filler;

[0055] S4: As the traction rope 74 is continuously pulled and the winding frame is continuously rotated to put the spiral material storage structure 7 into the tower body 1, the spiral material storage structure 7 will be completely installed between the two spiral installation arms 61. Then, stop pulling the cutting groove 73 and rotating the winding frame, and remove the traction rope 74 from the fixing hole 65. Fix the two ends of the traction rope 74 to the two ends of the winding shaft 200 respectively. That is, the installation of the spiral material storage structure 7 is completed;

[0056] S5: Start the water pump in the water tank 2 to convey water into the water delivery pipe 51, so that the water is discharged from the water outlet head 53 through the spiral water pipe 52 onto the fillers of each layer. Input the waste gas into the air inlet 31 through the air inlet pipe 3. The waste gas passes through the spiral air-permeable pads 72 of each layer, is captured and degraded by the microorganisms on the fillers, and finally the treated waste gas is discharged through the air outlet pipe 4. Thus, the waste gas treatment is completed;

[0057] S6: After the equipment has been used for a long time, new material areas, sub-new material areas, and old material areas are respectively formed at the top, middle, and bottom of the spiral air-permeable pad 72 in the tower body 1, and the filler needs to be replaced;

[0058] S7: Start the motor in the storage box 100 to drive the winding shaft 200 to rotate, so that the traction rope 74 fixed to the two ends of the winding shaft 200 is wound to pull the spiral rubber arm 71 out of the spiral installation groove 62, and thus the spiral air-permeable pad 72 is pulled out, so that the spiral rubber arm 71 and the spiral air-permeable pad 72 are wound onto the winding shaft 200. The filler on the spiral air-permeable pad 72 will fall into the discharge port 300 and be discharged during the winding process;

[0059] S8: As the winding reel 200 rotates continuously, the packing material in the old material area is discharged. Due to long-term use, the biofilm thickness of the packing material in the sub-new material area is just right. As the spiral material storage structure 7 moves continuously, the packing material in the sub-new material area enters the bottom of the tower body 1 to form usable packing material. The packing material in the new material area will enter the middle of the tower body 1 to form a new sub-new material area. Subsequently, the incoming spiral air cushion 72 is fed through the feeding device to form a new new material area, thus completing the replacement of the packing material.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A VOCs treatment device for pharmaceutical and chemical production, characterized in that, It includes a tower body and a central cylinder installed therein. The top of the tower body is an air outlet, and the bottom is an air inlet. A spiral replacement feeding device is provided between the tower body and the central cylinder. The spiral replacement feeding device includes a spiral installation structure fixed on the tower body and the central cylinder, and also includes a spiral material holding structure that can move within the spiral installation structure. The spiral installation structure includes two spiral installation arms respectively fixed on the tower body and the central cylinder. A spiral installation groove is formed inside the spiral installation arms. The spiral material holding structure includes two spiral rubber arms respectively inserted into the spiral installation grooves on both sides, and also includes a spiral air-permeable pad fixed between the two spiral rubber arms. A filler is laid on the spiral air-permeable pad. The filler is a filler with light weight. An inlet of the spiral material holding structure is provided at the position where the spiral installation structure penetrates the top of the tower body, and an outlet of the spiral material holding structure is provided at the position where the spiral installation structure penetrates the bottom of the tower body. After long-term use, the filler on the spiral air-permeable pad forms a new material area, a sub-new material area, and an old material area at the top, middle, and bottom of the tower body respectively. A spiral moving groove is also formed inside the spiral installation arms. A rope cavity is formed inside the spiral rubber arms. A traction rope is fixedly installed in the rope cavity. The length of the traction rope exposed outside the rope cavity is greater than the length of the spiral installation groove. A moving block moves in the spiral moving groove, and a fixing hole for connecting the traction rope is formed. A material shaking device is provided between the spiral installation structure and the spiral material holding structure. The material shaking device includes a spiral plate fixed between the two spiral installation arms. A number of first convex heads are equidistantly distributed on the spiral plate at the position of the old material area. The material shaking device also includes a spiral rubber plate fixed between the two spiral rubber arms. A number of second convex heads adapted to the first convex heads are equidistantly distributed on the spiral rubber plate.

2. The VOCs treatment equipment for pharmaceutical and chemical production according to claim 1, wherein, A unwinding box is fixedly installed at the bottom of the tower body. A winding frame for winding the spiral material holding structure is installed inside the unwinding box. A feeding device is also installed inside the unwinding box. A receiving box is fixedly installed at the bottom of the tower body. A winding shaft for winding the spiral material holding structure is rotatably installed inside the receiving box.

3. The VOCs treatment equipment for pharmaceutical and chemical production according to claim 2, characterized in that, The winding frame includes a chassis rotatably installed at the bottom of the unwinding box, and a support column fixed on the chassis. A discharge port is fixedly connected to the bottom of the receiving box. A motor for driving the winding shaft is fixed inside the receiving box. A number of cutting grooves are formed on one side of the spiral rubber arm close to the spiral moving groove.

4. A VOCs treatment device for pharmaceutical and chemical production according to claim 2, characterized in that, The feeding device includes an entrance and exit opened between the unwinding box and the tower body, and a feeding hopper fixed on the entrance and exit. The feeding hopper is provided with a feeding channel with a discharge port located inside the entrance and exit. A first guiding roller is rotatably installed inside the entrance and exit. An installation frame is fixedly installed on the unwinding box. A second guiding roller is rotatably installed on the installation frame. The spiral material holding structure enters the spiral installation structure between the first guiding roller and the second guiding roller.

5. A VOCs treatment device for pharmaceutical and chemical production according to claim 1, characterized in that, A spiral water pipe is fixedly installed inside the central cylinder. A number of water outlets are provided on the spiral water pipe above the spiral air permeable pad. A water delivery pipe with one end communicating with the spiral water pipe is also fixedly installed inside the central cylinder. A water tank is fixedly installed at the bottom of the tower body. A water pump is arranged inside the water tank. The other end of the water delivery pipe is fixedly connected and communicated with the water outlet end of the water pump.

6. A method for treating VOCs in pharmaceutical and chemical production, which uses a VOCs treatment device for pharmaceutical and chemical production as described in any one of claims 1-5, characterized in that, It includes the following steps: S1: Fix the towing ropes on both sides of the spiral rubber arm in two fixing holes respectively. Then, pass the two moving blocks through the entrance and exit and put them into the spiral moving grooves at the inlet of the spiral material holding structure. The two moving blocks will slide down from the spiral moving grooves on both sides. The moving blocks drive the towing ropes to move from the top to the bottom of the spiral mounting groove, and then are discharged from the spiral mounting groove to the outlet of the spiral material holding structure. S2: Pull the two moving blocks at the outlet of the spiral material holding structure, and manually remove the spiral material holding structure from the winding frame. Pass the spiral material holding structure through the entrance and exit, so that the spiral rubber arm is inserted into the spiral mounting groove and moves inside it. Then, pull one end of the towing rope and rotate the winding frame at the other end to put the spiral material holding structure into the tower body. The spiral material holding structure will enter the tower body between the first guide roller and the second guide roller. S3: Input the filler into the feeding hopper. The filler will be output from the feeding channel to the moving spiral air permeable pad. As the filler is continuously input into the feeding hopper, the spiral air permeable pad entering the tower body through the entrance and exit is evenly covered with the filler. S4: As the spiral material holding structure is continuously put into the tower body by continuously pulling the towing rope and rotating the winding frame, the spiral material holding structure will be completely installed between the two spiral mounting arms. Then, stop pulling the cutting groove and rotating the winding frame, and remove the towing rope from the fixing hole. Fix the two ends of the towing rope on the two ends of the winding shaft respectively, that is, the installation of the spiral material holding structure is completed. S5: Start the water pump in the water tank to convey water into the water delivery pipe, so that the water is discharged from the water outlet to each layer of the filler through the spiral water pipe. Input the waste gas into the air inlet through the air inlet pipe. The waste gas passes through each layer of the spiral air permeable pad, is captured and degraded by the microorganisms on the filler for VOCs, and finally the treated waste gas is discharged through the air outlet pipe, thus completing the waste gas treatment. S6: After the equipment is used for a long time, new material areas, sub-new material areas and old material areas are respectively formed at the top, middle and bottom of the tower body where the spiral air permeable pad is located, and the filler needs to be replaced. S7: Start the motor in the storage box to drive the winding shaft to rotate, so that the towing ropes fixed at both ends of the winding shaft are wound up, which will pull the spiral rubber arm out of the spiral mounting groove, and thus the spiral air permeable pad is pulled out, so that the spiral rubber arm and the spiral air permeable pad are wound onto the winding shaft. The filler on the spiral air permeable pad will fall into the discharge port and be discharged during the winding process. S8: As the take-up reel rotates continuously, the packing material in the old material area is discharged. Due to long-term use, the biofilm thickness of the packing material in the sub-new material area is just right. As the spiral material storage structure moves continuously, the packing material in the sub-new material area enters the bottom of the tower to form usable packing material. The packing material in the new material area will enter the middle of the tower to form a new sub-new material area. Subsequently, the incoming spiral air permeable pad is fed through the feeding device to form a new new material area, thus completing the replacement of the packing material.

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