A dichloromethane waste gas recovery adsorption device

Abstract

The application discloses a dichloromethane waste gas recovery adsorption equipment and belongs to the field of dichloromethane recovery adsorption. The dichloromethane waste gas recovery adsorption equipment comprises a gas inlet bin and supporting legs fixed to the outer wall of the gas inlet bin, the top of the gas inlet bin is fixedly connected with a filter disc, the top of the filter disc is fixedly connected with an adsorption cylinder, the bottom of the gas inlet bin is fixedly connected with a plurality of groups of pull ropes, and the bottom end of each pull rope is fixedly connected with an acid removal tank. The application moves the adsorption disc by reciprocating pushing, so that the activated carbon particles in the adsorption disc roll correspondingly, the effective contact area of the activated carbon and the waste gas is increased, the activated carbon is prevented from being accumulated together and mutually shielded to cause uneven adsorption, and thus the adsorption effect is improved. In addition, the suction force generated in the sealing sliding groove is utilized to accelerate the airflow speed around the acid removal tank, so as to drive the acid removal tank and the sodium hydroxide liquid in the acid removal tank to shake, make the acid removal tank and the sodium hydroxide liquid generate more uniform absorption and cooling effects, and improve the waste gas treatment effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dichloromethane recovery adsorption, and particularly relates to a dichloromethane waste gas recovery adsorption equipment. BACKGROUND

[0002] Dichloromethane is a volatile organic compound widely used in industrial cleaning, degreasing and chemical production fields, and due to its potential harm to the environment and health, effective recovery technology needs to be used to reduce emissions, and the adsorption method is one of the most widely used methods for recovering dichloromethane waste gas.

[0003] The adsorption method mainly relies on the characteristics of the adsorbent to capture dichloromethane molecules in the waste gas, and common adsorbents include activated carbon, silica gel, molecular sieve and the like, among which activated carbon is widely used due to its high efficiency, and the adsorption process is performed by passing the waste gas containing dichloromethane through a bed layer filled with activated carbon adsorbent, and using the large surface area and high porosity of the adsorbent to trap dichloromethane molecules in the waste gas.

[0004] At present, when dichloromethane is recovered and adsorbed, the activated carbon in the bed layer is stacked together, which will produce many mutual shielding areas on the surface of the activated carbon, resulting in uneven adsorption, thereby reducing the adsorption efficiency; and since the dichloromethane waste gas also contains other component impurities, such as hydrogen chloride and carbon monoxide, and some particulate impurities, so when it is directly introduced into the activated carbon bed layer, the acid gases and particulate impurities will be adsorbed on the activated carbon together, reducing the adsorption purity of dichloromethane, thereby reducing the final recovery quality; therefore, a dichloromethane waste gas recovery adsorption equipment is proposed. SUMMARY

[0005] The purpose of the present application is to solve the problem that in the prior art, there will be mutual shielding between the surfaces of the activated carbon, resulting in uneven adsorption, thereby reducing the adsorption efficiency; and the impurities in the waste gas are adsorbed on the activated carbon together, which reduces the adsorption purity of dichloromethane, thereby reducing the recovery quality, and a dichloromethane waste gas recovery adsorption equipment is proposed.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The utility model provides a dichloromethane waste gas recovery adsorption equipment, including air inlet warehouse and the support leg fixed in air inlet warehouse outer wall, the top of air inlet warehouse is fixed and is connected with filter disc, the top of filter disc is fixed and is connected with adsorption cylinder, the bottom of air inlet warehouse is connected with a plurality of groups of pull rope, and the bottom of pull rope is fixedly connected with acid removal tank, and acid removal tank and air inlet warehouse are connected through air guide pipe, still include: filter board, filter board rotation is connected in filter disc, a plurality of ring filter area are arranged on filter board, and the both sides pipeline of filter disc is aligned with ring filter area of filter board, wherein the top of filter disc is provided with drive part that drives filter board rotates, two groups of adsorption disc, the both sides of adsorption cylinder inner chamber are all provided with two layers of sealed sliding groove, and the both ends of two groups of adsorption disc are respectively slid in two layers of sealed sliding groove, wherein adsorption cylinder is provided with pneumatic part that promotes two groups of adsorption disc reciprocating sliding.

[0008] The side wall of the acid removal tank is fixedly connected with an air inlet pipe, the output end of the air inlet pipe is inserted into the lower part of the inner cavity of the acid removal tank, the lower part of the inner cavity of the acid removal tank is fixedly connected with a cold guide pipe, the side wall of the acid removal tank is fixedly connected with a refrigeration instrument, and the output end of the refrigeration instrument is connected with the input end of the cold guide pipe.

[0009] The drive part includes a drive motor fixed to the bottom of the adsorption cylinder, the rotating shaft of the filter plate penetrates through the top of the filter disc, and the rotating shaft of the filter plate is transmissionally connected with the drive motor through a belt pulley set, the inner cavity bottom and top of the filter disc are fixedly connected with shielding strips, and the two groups of shielding strips are attached to the bottom and top of the filter plate.

[0010] The pneumatic part includes a piston chamber, a piston plate slidably connected in the piston chamber, a push-pull rod rotatably connected to the bottom end of the piston plate, a linkage shaft rotatably connected to the inner wall of the filter disc, a rotating disc fixedly connected to the outer end of the linkage shaft, a positioning pin rotatably connected to the other end of the push-pull rod, and the end of the positioning pin is fixedly connected to the side wall of the rotating disc.

[0011] The inner end of the linkage shaft is fixedly connected with a helical gear, the side wall of the filter plate is fixedly connected with a helical gear disc, the helical gear disc is meshingly connected with the helical gear, and the helical gear disc passes through the shielding strip.

[0012] The inner cavity of the piston chamber is fixedly and communicatively connected with an air exhaust pipe, the top end of the air exhaust pipe is in communication with the upper sealed sliding groove, a first spring is fixedly connected to the inner wall of the lower sealed sliding groove close to the air exhaust pipe, a second spring is fixedly connected to the inner wall of the upper sealed sliding groove away from the air exhaust pipe, the other end of the first spring and the second spring is fixedly connected to the side wall of the corresponding adsorption disc, the sealed sliding grooves with and without the first spring and the second spring are in communication through a first air pipe and a second air pipe, respectively.

[0013] The top of the filter disc is fixedly connected with a back flushing pipe, the other end of the back flushing pipe is communicated with the sealing sliding groove cavity provided with the second spring, and a one-way valve is arranged in the back flushing pipe, the top of the inner cavity of the filter disc is fixedly connected with a back flushing disc, the back flushing pipe is communicated with the inner cavity of the back flushing disc, the output end of the back flushing pipe is aligned with the annular filtering area of the filter plate, and the two side pipes of the back flushing disc and the filter disc are symmetrically arranged along the center of the filter disc.

[0014] The bottom of the filter disc is fixedly connected with a collection box, the collection box is communicated with the inner cavity of the filter disc, and the collection box is located directly below the back flushing disc, the bottom of the collection box is fixedly connected and communicated with a slag discharge pipe, and an electromagnetic valve is arranged in the slag discharge pipe.

[0015] The sealing sliding groove provided with the second spring is fixedly connected and communicated with a gas supplement pipe on both sides, the other end of the gas supplement pipe faces the side wall of the acid removal tank, and a one-way valve is arranged in the gas supplement pipe.

[0016] The inclined shielding plate is fixedly connected in the air inlet bin, and the output end of the air guide pipe is located below the shielding plate.

[0017] Compared with the prior art, the present application provides a dichloromethane waste gas recovery adsorption equipment, which has the following beneficial effects:

[0018] 1、The dichloromethane waste gas recovery adsorption equipment, by reciprocatingly pushing the adsorption disc to move, the internal active carbon particles are correspondingly rolled, the effective contact area of the active carbon and the waste gas is increased, the active carbon is prevented from being accumulated together to block each other to cause uneven adsorption, thereby the adsorption effect is improved, and the suction force generated in the sealing sliding groove is utilized to accelerate the airflow speed around the acid removal tank, so as to drive the acid removal tank and the internal sodium hydroxide liquid to shake, so that more uniform absorption and cooling effect are generated, and the waste gas treatment effect is improved.

[0019] 2、The dichloromethane waste gas recovery adsorption equipment, by the low-temperature sodium hydroxide in the acid removal tank, the acidic components in the waste gas are neutralized and removed, and part of the particulate matters carried by the waste gas are removed, the preliminary treatment of the waste gas is realized, at the same time, the cooling effect is transmitted to the adsorption disc, the energy of the dichloromethane molecules is reduced, so that they are less likely to be separated from the adsorption of the active carbon, thereby the adsorption amount and the adsorption efficiency are improved.

[0020] 3、The dichloromethane waste gas recovery adsorption equipment, through the filter plate of the filter surface is switched constantly, cooperate preliminary processing effect, effectively improve the waste gas filtration treatment effect, ensure the purity of dichloromethane before being absorbed, thereby improve the final recovery quality of dichloromethane, and utilize the gas thrust effect generated when the adsorption disc reciprocates, realize the backflush cleaning of the filter plate, thereby restore its original permeability, prolong its service life, improve the filtration effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall structure of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 1 ;

[0022] Figure 2 The overall structure of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 2 ;

[0023] Figure 3 The overall structure of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 3 ;

[0024] Figure 4 The side view cross-sectional structure of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 1 ;

[0025] Figure 5 The side view cross-sectional structure of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 2 ;

[0026] Figure 6 The A area of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 5 Enlarged structure schematic view;

[0027] Figure 7 The B area of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application Figure 5 Enlarged structure schematic view;

[0028] Figure 8 The internal structure of a filter disc of a dichloromethane waste gas recovery adsorption equipment is proposed in the present application

[0029] In the figure: 1, air inlet bin; 2, support leg; 3, filter disc; 31, adsorption cylinder; 311, air outlet pipe; 32, pull rope; 33, acid removal tank; 331, air inlet pipe; 332, cold guide pipe; 333, refrigeration instrument; 34, air guide pipe; 4, filter plate; 41, bevel gear disc; 5, adsorption disc; 51, sealing sliding groove; 511, first spring; 512, second spring; 513, first air pipe; 514, second air pipe; 6, driving motor; 61, belt pulley set; 62, shielding bar; 7, piston bin; 71, piston plate; 72, push-pull rod; 73, linkage shaft; 731, rotating disc; 732, positioning pin; 733, bevel gear; 74, air exhaust pipe; 75, air supplement pipe; 8, back flushing pipe; 81, back flushing disc; 82, collection box; 83, residue discharge pipe; 9, shielding plate. DETAILED DESCRIPTION

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

[0031] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] Embodiment:

[0033] Reference Figures 1-8 A dichloromethane waste gas recovery adsorption equipment, including air inlet bin 1 and fixed in air inlet bin 1 outer wall support leg 2, air inlet bin 1 top fixed and communicated with filter disc 3, filter disc 3 top fixed and communicated with adsorption cylinder 31, the side wall upper portion of adsorption cylinder 31 is installed with air outlet pipe 311, air outlet pipe 311 is used to discharge the treated gas from adsorption cylinder 31, air inlet bin 1 bottom is fixedly connected with multiple groups of pull rope 32, the bottom end of pull rope 32 is fixedly connected with acid removal tank 33, acid removal tank 33 and air inlet bin 1 are connected through air guide pipe 34, still include: filter plate 4, filter plate 4 is rotatably connected in filter disc 3, multiple layers of annular filter area are arranged on filter plate 4, and the two side pipes of filter disc 3 are aligned with the annular filter area of filter plate 4, wherein, the top of filter disc 3 is provided with a driving part for driving filter plate 4 to rotate;Two groups of adsorption discs 5, two layers of sealing sliding grooves 51 are formed in the cavities of adsorption cylinder 31 two sides, and the two ends of the two groups of adsorption discs 5 are respectively slid in the upper and lower two layers of sealing sliding grooves 51, wherein, the adsorption cylinder 31 is provided with a pneumatic part for driving the two groups of adsorption discs 5 to reciprocatingly slide, and the adsorption disc 5 is filled with activated carbon.

[0034] Referring to Figures 1-5 Wherein, the side wall of the acid removal tank 33 is fixedly connected with an air inlet pipe 331, the input end of the air inlet pipe 331 is connected with the exhaust end of the dichloromethane waste gas, the output end of the air inlet pipe 331 is inserted into the lower part of the inner cavity of the acid removal tank 33, the lower part of the inner cavity of the acid removal tank 33 is fixedly connected with a cooling guide pipe 332, the side wall of the acid removal tank 33 is fixedly connected with a refrigeration instrument 333, the output end of the refrigeration instrument 333 is connected with the input end of the cooling guide pipe 332, and the acid removal tank 33 is filled with sodium hydroxide liquid.

[0035] Through the above structure, the dichloromethane waste gas is transported into the acid removal tank 33 through the air inlet pipe 331, the waste gas passes through the sodium hydroxide liquid in the acid removal tank 33, thereby neutralizing and removing the acidic components in the waste gas, and removing part of the particulate matter carried in the waste gas, realizing the preliminary treatment of the waste gas, at the same time, the refrigeration instrument 333 is started, and the sodium hydroxide liquid in the acid removal tank 33 is cooled by the cooling guide pipe 332, which is conducive to improving the solubility of gas in liquid, thereby enhancing the absorption effect (because the gas dissolution process is an exothermic reaction, according to Le Chatelier's principle, a low-temperature environment helps to promote the balance to move in the direction of the product), thereby improving the removal efficiency; in addition, the temperature of dichloromethane can be reduced, and when it enters the adsorption disc 5, the low-temperature effect can be transmitted to the activated carbon, thereby improving the adsorption capacity and adsorption efficiency (under low-temperature conditions, the attraction between dichloromethane molecules and the surface of activated carbon is stronger, which means that more molecules can be effectively adsorbed onto the surface of activated carbon, because lower temperature reduces the energy of dichloromethane molecules, making them less likely to detach from the adsorption site); and when the waste gas continuously overflows from the inside of the sodium hydroxide liquid, the gas bubble floating effect is used to produce local fluid motion in the sodium hydroxide liquid, which drives the surrounding liquid to move, thereby promoting the mixing between the upper and lower layers of liquid, so that the refrigeration effect of the cooling guide pipe 332 is evenly distributed in the liquid, thereby improving the cooling effect.

[0036] Referring to Figure 1 , Figure 4 , Figure 7 and Figure 8 Wherein, the driving part includes a driving motor 6, the driving motor 6 is fixed at the bottom of the adsorption cylinder 31, the rotating shaft of the filter plate 4 penetrates to the top of the filter disc 3, and the rotating shaft of the filter plate 4 is transmissionally connected with the driving motor 6 through a belt pulley set 61, the inner cavity bottom and top of the filter disc 3 are fixedly connected with a blocking strip 62, the two groups of blocking strips 62 are in close contact with the bottom and top of the filter plate 4, and the blocking strip 62 can maximize the reduction of the airflow communication between the two side cavities of the filter disc 3, so as to realize the aeration and backflushing effect in the filter disc 3 at the same time.

[0037] Through the arrangement of the above structure, when the waste gas after preliminary treatment enters the filter disc 3, the driving motor 6 will drive the filter plate 4 to rotate in the filter disc 3 through the transmission of the belt pulley set 61. At this time, the waste gas will pass through the filter plate 4 which constantly switches the filter surface, thereby effectively improving the filtering efficiency and realizing the secondary filtration treatment of the waste gas, removing other particulate impurities contained in the waste gas again, improving the waste gas treatment effect, ensuring the purity of the subsequent dichloromethane absorption, and thereby improving the final recovery quality of dichloromethane.

[0038] With reference to Figures 3-8 The pneumatic part includes a piston chamber 7, a piston plate 71 is slidably connected in the piston chamber 7, a push-pull rod 72 is rotatably connected to the bottom end of the piston plate 71, a linkage shaft 73 is rotatably connected to the inner wall of the filter disc 3, a disc 731 is fixedly connected to the outer end of the linkage shaft 73, a positioning pin 732 is rotatably connected to the other end of the push-pull rod 72, and the end of the positioning pin 732 is fixedly connected to the side wall of the disc 731; a helical gear 733 is fixedly connected to the inner end of the linkage shaft 73, a helical gear disc 41 is fixedly connected to the side wall of the filter plate 4, the helical gear disc 41 is meshingly connected with the helical gear 733, and the helical gear disc 41 passes through the shielding strip 62; an exhaust pipe 74 is fixedly and communicatively connected to the upper part of the inner cavity of the piston chamber 7, the top end of the exhaust pipe 74 is in communication with the upper sealing sliding groove 51, a first spring 511 is fixedly connected to the inner wall of the lower sealing sliding groove 51 close to the exhaust pipe 74, a second spring 512 is fixedly connected to the inner wall of the upper sealing sliding groove 51 away from the exhaust pipe 74, the other ends of the first spring 511 and the second spring 512 are fixedly connected to the end side wall of the corresponding adsorption disc 5, the sealing sliding grooves 51 with the first spring 511 and the second spring 512 are in communication through a first gas pipe 513, and the sealing sliding grooves 51 without the first spring 511 and the second spring 512 are in communication through a second gas pipe 514.

[0039] Through the arrangement of the above structure, the gas treated subsequently enters the adsorption cylinder 31. In the process of rotating the filter plate 4, the meshing action between the bevel gear plate 41 and the bevel gear 733 drives the rotating disc 731 to rotate. At this time, in cooperation with the arrangement of the push-pull rod 72, the piston plate 71 slides up and down in the piston chamber 7. When the piston plate 71 slides upward, the gas in the piston chamber 7 is compressed, so that the gas enters the two sealed sliding grooves 51 through the exhaust pipe 74 and the second gas pipe 514, thereby pushing the adsorption disc 5 in the sealed sliding groove 51 to slide to the side of the compressed first spring 511 and the second spring 512. When the piston plate 71 slides downward, suction is generated in the piston chamber 7, so that the gas filled in the sealed sliding groove 51 is sucked back into the piston chamber 7. Under the rebounding action of the first spring 511 and the second spring 512, the two groups of adsorption discs 5 are reset and slide. Thus, the two groups of adsorption discs 5 move back and forth, so that the activated carbon particles in them roll correspondingly, increasing the effective contact area of the activated carbon and the exhaust gas, avoiding the accumulation of activated carbon, and improving the adsorption effect.

[0040] With reference to Figures 4-8 The top of the filter disc 3 is fixedly connected with a back flushing pipe 8, the other end of the back flushing pipe 8 is connected with the inner cavity of the sealed sliding groove 51 provided with the second spring 512, and a one-way valve is arranged in the back flushing pipe 8. The inner cavity of the top of the filter disc 3 is fixedly connected with a back flushing disc 81, the inner cavity of the back flushing pipe 8 is connected with the inner cavity of the back flushing disc 81, and the output end of the back flushing pipe 8 is aligned with the annular filter area of the filter plate 4, and the back flushing disc 81 and the two side pipes of the filter disc 3 are symmetrically arranged along the center of the filter disc 3. The bottom of the filter disc 3 is fixedly connected with a collection box 82, the collection box 82 is connected with the inner cavity of the filter disc 3, and the collection box 82 is located directly below the back flushing disc 81. The bottom of the collection box 82 is fixedly connected with a slag discharge pipe 83, and an electromagnetic valve is arranged in the slag discharge pipe 83.

[0041] It should be noted that the one-way valve in the back flushing pipe 8 can only allow the gas in the sealed sliding groove 51 to enter the back flushing disc 81.

[0042] Through the arrangement of the above structure, when the first spring 511 and the second spring 512 are compressed, the adsorption disc 5 will compress the gas in the sealed sliding groove 51 where it is located, and the one-way valve in the back flushing pipe 8 will be opened, so that the compressed gas on both sides flows into the back flushing disc 81 through the back flushing pipe 8, thereby generating a downward gas back flushing effect on the top of the filter plate 4, and the annular filter area of the filter plate 4 rotating to the back flushing disc 81 below is back flushed and cleaned, thereby removing the impurities attached to the annular filter area of the filter plate 4, restoring the original permeability, and prolonging the service life. The blown-off impurities finally fall into the collection box 82, and only need to be discharged by opening the electromagnetic valve in the slag discharge pipe 83 at regular intervals, thereby improving the convenience.

[0043] Referring to Figures 1-5 Wherein, the sealed chute 51 equipped with the second spring 512 is fixed and communicated with the air supplement pipe 75 on both sides, the other end of the air supplement pipe 75 is towards the side wall of the acid removal tank 33, and a one-way valve is arranged in the air supplement pipe 75.

[0044] It should be noted that the one-way valve in the air supplement pipe 75 can only allow the gas flow around the acid removal tank 33 to be sucked into the sealed chute 51.

[0045] Through the above structure, when the first spring 511 and the second spring 512 are reset, suction will be generated in the sealed chute 51, and the one-way valve in the air supplement pipe 75 will be opened, so that the gas around the acid removal tank 33 is sucked into the sealed chute 51, and the gas flow rate around the acid removal tank 33 is also accelerated. Combined with the arrangement of the pull rope 32, the acid removal tank 33 is slightly shaken as a whole, so that the sodium hydroxide liquid inside is shaken to absorb and cool more uniformly, thereby improving the waste gas treatment effect.

[0046] Referring to Figure 4 , Figure 5 Wherein, the air inlet bin 1 is fixedly connected with an inclined baffle 9, and the output end of the air guide pipe 34 is located below the baffle 9; the inclined baffle 9 can effectively prevent impurities in the filter disc 3 from flowing back along the air guide pipe 34, thereby reducing the content of non-absorbable impurities in the acid removal tank 33 and ensuring the acid removal effect in the acid removal tank 33.

[0047] Referring to Figures 1-8 In the present application, when in use, dichloromethane waste gas is transported into the acid removal tank 33 through the air inlet pipe 331, and the waste gas passes through the sodium hydroxide liquid in the acid removal tank 33, thereby neutralizing and removing the acidic components in the waste gas and removing part of the particulate matter carried in the waste gas, achieving preliminary treatment of the waste gas. At the same time, the refrigeration instrument 333 is turned on, and the sodium hydroxide liquid in the acid removal tank 33 is cooled by the cold guide pipe 332. This is conducive to improving the solubility of the gas in the liquid, thereby enhancing the absorption effect. In addition, the temperature of dichloromethane can be reduced, and when it enters the adsorption disc 5, the low-temperature effect can be transmitted to the activated carbon, so that the attraction between the dichloromethane molecules and the surface of the activated carbon is stronger, thereby improving the adsorption capacity and adsorption efficiency. Moreover, when the waste gas continuously flows out from the inside of the sodium hydroxide liquid, the gas bubble floating effect is utilized to produce local fluid motion in the sodium hydroxide liquid, which drives the surrounding liquid to move, thereby promoting the mixing between the upper and lower layers of liquid, so that the refrigeration effect of the cold guide pipe 332 is uniformly distributed in the liquid, thereby improving the cooling effect.

[0048] The processed gas enters the adsorption cylinder 31. During the rotation of the filter plate 4, the meshing action between the bevel gear 733 and the bevel disc 41 drives the rotating disc 731 to rotate. At this time, the push-pull rod 72 is arranged to drive the piston plate 71 to slide up and down in the piston chamber 7. When the piston plate 71 slides up, the gas in the piston chamber 7 is compressed, so that the gas enters the two sealed sliding grooves 51 through the exhaust pipe 74 and the second gas pipe 514, thereby pushing the adsorption disc 5 in the sealed sliding groove 51 to slide to the side of the compressed first spring 511 and second spring 512. When the piston plate 71 slides down, a suction effect is generated in the piston chamber 7, so that the gas filled in the sealed sliding groove 51 is sucked back into the piston chamber 7. Under the rebound action of the first spring 511 and the second spring 512, the two groups of adsorption discs 5 are reset and slide. Thus, the two groups of adsorption discs 5 continuously move back and forth, so that the activated carbon particles in them roll correspondingly, increasing the effective contact area of activated carbon and waste gas, avoiding the accumulation of activated carbon, and improving the adsorption effect.

[0049] When the first spring 511 and the second spring 512 are compressed, the adsorption disc 5 simultaneously compresses the gas in the sealed sliding groove 51, and opens the one-way valve in the backblowing pipe 8, so that the compressed gas on both sides enters the backblowing disc 81 along the backblowing pipe 8, thereby generating a downward gas backblowing effect on the top of the filter plate 4, cleaning the annular filter area of the filter plate 4 rotating below the backblowing disc 81, removing the impurities attached to the annular filter area of the filter plate 4, restoring its original permeability, and prolonging its service life. The impurities blown off finally fall into the collection box 82, and only need to be discharged by opening the electromagnetic valve in the slag discharge pipe 83 periodically, improving the convenience. When the first spring 511 and the second spring 512 reset, a suction effect is generated in the sealed sliding groove 51, and the one-way valve in the air supplement pipe 75 is opened, so that the gas around the acid removal tank 33 is sucked into the sealed sliding groove 51, thereby accelerating the gas flow rate around the acid removal tank 33. In combination with the arrangement of the pull rope 32, the acid removal tank 33 is slightly shaken as a whole, so that the sodium hydroxide liquid in it is shaken, so that it is more uniformly absorbed and cooled, improving the waste gas treatment effect.

[0050] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A dichloromethane waste gas recovery adsorption device, comprising a gas inlet bin (1) and a supporting leg (2) fixed on the outer wall of the gas inlet bin (1), characterized in that, The top of the air inlet bin (1) is fixed and communicated with a filter disc (3), the top of the filter disc (3) is fixed and communicated with an adsorption cylinder (31), the bottom of the air inlet bin (1) is fixedly connected with a plurality of groups of pull ropes (32), the bottom end of the pull rope (32) is fixedly connected with an acid removal tank (33), the acid removal tank (33) and the air inlet bin (1) are communicated through a gas guide pipe (34), and the device further comprises: A filter plate (4) is rotationally connected in the filter disc (3), a plurality of annular filter areas are formed in the filter plate (4), the pipelines on the two sides of the filter disc (3) are aligned with the annular filter areas of the filter plate (4), and the top of the filter disc (3) is provided with a driving part for driving the rotation of the filter plate (4); two groups of adsorption discs (5) are arranged, two layers of sealing sliding grooves (51) are formed in the cavities on the two sides of the adsorption cylinder (31), and the two ends of the two groups of adsorption discs (5) are respectively slid in the upper and lower two layers of sealing sliding grooves (51); wherein the adsorption cylinder (31) is provided with a pneumatic part for driving the reciprocating sliding of the two groups of adsorption discs (5). The acid-removing tank (33) is fixedly connected with an air inlet pipe (331) on the side wall, the output end of the air inlet pipe (331) is inserted into the lower part of the inner cavity of the acid-removing tank (33), the lower part of the inner cavity of the acid-removing tank (33) is fixedly connected with a cold guide pipe (332), the side wall of the acid-removing tank (33) is fixedly connected with a refrigeration instrument (333), and the output end of the refrigeration instrument (333) is connected with the input end of the cold guide pipe (332).

2. The dichloromethane exhaust gas recovery adsorption apparatus according to claim 1, characterized by The driving part comprises a driving motor (6), the driving motor (6) is fixed on the bottom of the adsorption cylinder (31), the rotating shaft of the filter plate (4) penetrates through the top of the filter disc (3), and the rotating shaft of the filter plate (4) is in transmission connection with the driving motor (6) through a belt pulley set (61), the inner cavity bottom and top of the filter disc (3) are fixedly connected with a blocking strip (62), and the bottom and top of the filter plate (4) are attached to the two groups of blocking strips (62). The piston plate (71) is fixedly and communicatively connected with an exhaust pipe (74) in the upper part of the inner cavity of the piston bin (7), the top end of the exhaust pipe (74) is connected with the upper layer of the sealing sliding groove (51), the first spring (511) is fixedly connected to the inner wall of the lower layer of the sealing sliding groove (51) close to the exhaust pipe (74), the second spring (512) is fixedly connected to the inner wall of the upper layer of the sealing sliding groove (51) away from the exhaust pipe (74), the other ends of the first spring (511) and the second spring (512) are fixedly connected with the end wall of the corresponding adsorption disc (5), the sealing sliding grooves (51) with the first spring (511) and the second spring (512) are connected with each other through the first air pipe (513), and the sealing sliding grooves (51) without the first spring (511) and the second spring (512) are connected with each other through the second air pipe (514). The inner end of the linkage shaft (73) is fixedly connected with a helical gear (733), the side wall of the filter plate (4) is fixedly connected with a helical gear plate (41), the helical gear plate (41) is in meshing connection with the helical gear (733), and the helical gear plate (41) penetrates through the blocking strip (62).

3. The dichloromethane exhaust gas recovery adsorption apparatus according to claim 1, characterized by The top of the filter disc (3) is fixedly connected with a back flushing pipe (8), one end of the back flushing pipe (8) is communicated with the inner cavity of a sealing sliding groove (51) provided with a second spring (512), and a one-way valve is arranged in the back flushing pipe (8), the top of the inner cavity of the filter disc (3) is fixedly connected with a back flushing disc (81), the inner cavity of the back flushing pipe (8) is communicated with the inner cavity of the back flushing disc (81), the output end of the back flushing pipe (8) is aligned with the annular filtering area of the filter plate (4), and the back flushing disc (81) and the two side pipes of the filter disc (3) are symmetrically arranged along the center of the filter disc (3).

4. A dichloromethane waste gas recovery adsorption apparatus according to claim 3, characterized by The bottom of the filter disc (3) is fixedly connected with a collecting box (82), the collecting box (82) is communicated with the inner cavity of the filter disc (3), and the collecting box (82) is located directly below the back flushing disc (81), the bottom of the collecting box (82) is fixedly connected with a slag discharge pipe (83) in communication, and the slag discharge pipe (83) is provided with an electromagnetic valve.

5. The dichloromethane exhaust gas recovery adsorption apparatus according to claim 1, characterized by The two sides of the sealing sliding groove (51) provided with the second spring (512) are fixedly connected with air supplement pipes (75) in communication, one end of the air supplement pipe (75) faces the side wall of the acid removal tank (33), and a one-way valve is arranged in the air supplement pipe (75).

6. The dichloromethane exhaust gas recovery adsorption apparatus according to claim 1, characterized by An inclined shielding plate (9) is fixedly connected in the air inlet bin (1), and the output end of the air guide pipe (34) is located below the shielding plate (9).

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