Double-group automatic switching gas purification adsorption bed and VOCs (volatile organic compounds) gas treatment process thereof

Abstract

The invention relates to the technical field of gas purification, in particular to a double-group automatic switching gas purification adsorption bed and a process for treating VOCs (volatile organic compounds) gas by the double-group automatic switching gas purification adsorption bed. Two groups of symmetrically arranged adsorption tanks, a main pipeline and a recovery pipeline are mounted on the base; a filter plate and an adsorption column are mounted in the adsorption tank; a connecting pipeline is mounted at the bottom end of the adsorption tank; the other end of the connecting pipeline is communicated with the recycling pipeline; opening and closing mechanisms are arranged on the two connecting pipelines; an exhaust pipeline is mounted at the top end of the adsorption tank; an air exhaust mechanism is arranged on the base; a switching mechanism is further arranged in the base; the switching mechanism can alternately drive the two opening and closing mechanisms to act to accelerate air flow through the air exhaust mechanism when the air exhaust mechanism acts, so that the adsorption and purification efficiency is improved; and efficient gas purification can be realized through mutual cooperation of the gas extraction mechanism, the switching mechanism and the opening and closing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of gas purification, and specifically to a double-group automatic switching gas purification adsorption bed and a process for treating VOCs gas. Background Technique

[0002] VOCs (volatile organic compounds) are a common type of air pollutant, mainly originating from the waste gas discharged by factories, and are commonly found in industries such as paint production, chemical fiber industry, metal coating, chemical coatings, shoemaking and leather-making, electroplating, plywood manufacturing, tire manufacturing, and wastewater treatment plants. Harmful volatile organic compounds mainly include acetone, toluene, phenol, dimethylaniline, formaldehyde, n-hexane, ethyl acetate, ethanol, etc. Adsorption processes are often used to purify VOCs.

[0003] The adsorption process generally uses activated carbon or activated carbon fiber as the adsorption material, which has a large specific surface area. The adsorbent can effectively capture the organic molecules in VOCs, while inert gases are not easily adsorbed, so that VOCs and inert gases are separated. The intake air flows through the adsorption bed layer that serves as the adsorption function, and the VOCs molecules are adsorbed on the surface of the adsorbent, and the adsorption tail gas is discharged from the tail of the adsorption bed. Common adsorption processes often use double-group or multi-group adsorption beds for purification treatment.

[0004] Common double-group adsorption beds include two adsorption tanks connected to the intake pipeline. An electric control valve is provided at the intake end of the adsorption tank, and a sensor is arranged inside the adsorption tank; both the electric control valve and the sensor are in communication connection with the control system. During use, the control system will alternately control the action of the electric control valve according to the signal transmitted by the sensor to keep one adsorption tank connected to the intake pipeline and the other adsorption tank not connected to the intake pipeline, so that the two adsorption tanks can alternately adsorb and purify the air in the intake pipeline in a cycle. Since there is no direct connection and cooperation between the two electric control valves, but a logical cooperation relationship is established through software program control; as the use time increases, some components in each execution action structure often age, resulting in signal transmission delay and action execution component jamming, and ultimately causing a problem of reduced cooperation accuracy, which affects the adsorption purification efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-group automatic switching gas purification adsorption bed and a process for treating VOCs gas to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A double-group automatic switching gas purification adsorption bed includes a base; two groups of symmetrically arranged adsorption tanks, a main pipeline, and a recovery pipeline are installed on the base; A filter plate and an adsorption column are installed in the adsorption tank; A connecting pipe is installed at the bottom end of the adsorption tank; an intake branch pipe communicating with the main pipe is installed on the connecting pipe; the other end of the connecting pipe communicates with the recovery pipe; Opening and closing mechanisms are arranged on both of the two connecting pipes; the opening and closing mechanism includes a plurality of sealing blocks rotatably installed on the intake branch pipe; the plurality of sealing blocks can move away from or close to each other to conduct or block the connecting pipe and the main pipe; An exhaust pipe is installed at the top end of the adsorption tank; An air extraction mechanism is arranged on the base; when the air extraction mechanism operates, it can pump the gas in the main pipe into the adsorption tank and pump the gas in the adsorption tank into the exhaust pipe; A switching mechanism is further arranged in the base; when the air extraction mechanism operates, the switching mechanism can alternately drive the two opening and closing mechanisms to operate.

[0007] As a further scheme of the present invention: the air extraction mechanism includes a motor and an air extractor installed on the base; the output end of the motor is fixedly connected to the air extractor; the intake end of the air extractor communicates with the exhaust pipe.

[0008] As a further scheme of the present invention: the opening and closing mechanism further includes a full gear rotatably installed on the intake branch pipe; a chute is formed on the full gear; a protruding column slidably fitted with the chute is installed on the sealing block.

[0009] As a further scheme of the present invention: the switching mechanism includes a first rotating shaft, a second rotating shaft and a third rotating shaft rotatably installed on the base; a second belt pulley and a third belt pulley are installed on the first rotating shaft; a fourth belt pulley is installed on the second rotating shaft; a first belt pulley is installed on the output end of the motor; the first belt pulley and the second belt pulley are connected by a belt; the third belt pulley and the fourth belt pulley are connected by a belt; a worm is installed on the second rotating shaft; a worm gear meshing with the worm is installed on the third rotating shaft; semi-gears meshing with the full gears are installed at both ends of the third rotating shaft.

[0010] As a further scheme of the present invention: the two semi-gears are displaced from each other; that is, when one semi-gear meshes with one full gear, the other semi-gear disengages from the other full gear.

[0011] As a further scheme of the present invention: a third guide post is installed in the connecting pipe; an intake piston slidably installed on the third guide post and slidably sealed with the intake branch pipe is installed on the third guide post; a second spring is wound around the third guide post; both ends of the second spring abut against the intake piston and the third guide post respectively.

[0012] As a further solution of the present invention: a steam inlet pipe is installed on the adsorption tank; a first guide column and a second guide column are installed in the adsorption tank; an exhaust piston is slidably installed on the first guide column; the exhaust piston is slidably and sealingly connected to the exhaust pipe; a steam inlet piston is slidably installed on the second guide column; the steam inlet piston is slidably and sealingly connected to the steam inlet pipe; a first spring is wrapped around the second guide column; and the two ends of the first spring respectively contact the steam inlet piston and the second guide column.

[0013] As a further solution of the present invention: a rotating connecting rod is rotatably installed in the adsorption tank; a first telescopic column hinged to the steam intake piston is slidably installed at one end of the rotating connecting rod; a second telescopic column hinged to the exhaust piston is slidably installed at the other end of the rotating connecting rod.

[0014] As a further solution of the present invention: a fence is installed on the base.

[0015] A process for treating VOCs gas using a dual set of automatically switched gas purification adsorption beds as described in any one of the claims, comprising the following steps: Step 1: The air extraction mechanism operates to extract the air containing VOCs gas in the main pipeline into the adsorption tanks whose sealing blocks are far away from each other; and the air in the adsorption tanks is extracted into the exhaust pipeline; during this process, the adsorption column will absorb VOCs to reduce the VOCs content of the air extracted into the exhaust pipeline; Step 2: The vacuum mechanism drives the switching mechanism to move, thereby driving the two opening and closing mechanisms to move, so that the sealing blocks that are far away from each other are moved closer to each other; at the same time, the sealing blocks that are in conflict with each other are moved away from each other; so as to close one adsorption tank and open the other adsorption tank; Step 3: The vacuum mechanism continues to operate to pump the air containing VOCs gas in the main pipeline into the adsorption tanks that are separated from each other by the sealing blocks; and the air in the adsorption tanks is pumped into the exhaust pipeline; during this process, the adsorption column will adsorb VOCs to reduce the VOCs content of the air pumped into the exhaust pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The air flow is accelerated by the air extraction mechanism to improve the adsorption purification efficiency; the efficient gas purification can be achieved through the cooperation between the air extraction mechanism, the switching mechanism and the opening and closing mechanism; the automatic switching mechanism ensures the continuous operation of the system and avoids intermittent shutdown caused by the saturation of a single adsorption bed; Due to the direct connection and cooperation between various functional components, without reducing production efficiency, it avoids the problem of low cooperation accuracy caused by phenomena such as signal conduction lag and jamming of moving parts in the process of coordinating the cooperation between multiple drive components by using a logic program through an industrial control host, and reduces the risk of disorder in the cooperation relationship between components during equipment operation. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0018] Figure 2 It is Figure 1 a schematic structural diagram of the position A in

[0019] Figure 3 It is a schematic structural diagram of an adsorption tank in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0020] Figure 4 It is Figure 3 a schematic structural diagram from a sectional view perspective of

[0021] Figure 5 It is a schematic structural diagram of an inlet steam piston and an exhaust piston in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0022] Figure 6 It is a schematic structural diagram of a third rotating shaft in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0023] Figure 7 It is a schematic structural diagram of a switching mechanism in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0024] Figure 8 It is Figure 7 a schematic structural diagram from a sectional view perspective of

[0025] Figure 9 It is a schematic structural diagram of an opening and closing mechanism in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0026] Figure 10 It is a schematic structural diagram of a chute in an embodiment of a double-group automatic switching gas purification adsorption bed and its process for treating VOCs gas.

[0027] In the figure: 1. Base; 101. Fence; 2. Adsorption tank; 201. Filter plate; 202. First guide post; 203. Second guide post; 204. Steam inlet pipe; 3. Adsorption column; 4. Main pipe; 5. Connecting pipe; 501. Intake branch pipe; 502. Third guide post; 6. Exhaust pipe; 7. Motor; 701. First pulley; 8. Exhaust fan; 9. First rotating shaft; 901. Second pulley; 902. Third pulley; 10. Second rotating shaft; 1001. Worm; 1002. Fourth pulley; 11. Third rotating shaft; 1101. Worm gear; 1102. Half gear; 12. Full gear; 1201. Chute; 13. Sealing block; 1301. Protruding column; 14. Steam inlet piston; 15. First spring; 16. Rotating connecting rod; 17. First telescopic column; 18. Second telescopic column; 19. Exhaust piston; 20. Intake piston; 21. Second spring; 22. Recovery pipe. Detailed implementation manners

[0028] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0030] Please refer to Figures 1 to 10, in the embodiments of the present invention, a gas purification adsorption bed with dual-group automatic switching includes a base 1; two symmetrically arranged adsorption tanks 2, a main pipeline 4 and a recovery pipeline 22 are installed on the base 1; A filter plate 201 and an adsorption column 3 are installed in the adsorption tank 2; A connecting pipeline 5 is installed at the bottom end of the adsorption tank 2; an intake branch pipe 501 communicating with the main pipeline 4 is installed on the connecting pipeline 5; the other end of the connecting pipeline 5 communicates with the recovery pipeline 22; Opening and closing mechanisms are arranged on both of the two connecting pipelines 5; the opening and closing mechanism includes a plurality of sealing blocks 13 rotatably installed on the intake branch pipe 501; the plurality of sealing blocks 13 can move away from or close to each other to conduct or block the connecting pipeline 5 and the main pipeline 4; An exhaust pipeline 6 is installed at the top end of the adsorption tank 2; An air extraction mechanism is arranged on the base 1; when the air extraction mechanism operates, it can pump the gas in the main pipeline 4 into the adsorption tank 2 and pump the gas in the adsorption tank 2 into the exhaust pipeline 6; A switching mechanism is further arranged in the base 1; the switching mechanism can alternately drive the two opening and closing mechanisms to operate when the air extraction mechanism operates.

[0031] Taking the embodiment combined with all the features described in this application as an example, in use, the main pipeline 4 is connected to the production equipment, and the gas containing VOCs generated during the production process will enter the main pipeline 4.

[0032] The gas containing VOCs enters the adsorption tank 2 through the connecting pipeline 5. When the gas passes through the adsorption column 3, the VOCs will be adsorbed by the adsorption column 3, so that the VOCs content of the gas entering the exhaust pipeline 6 from the adsorption tank 2 is reduced.

[0033] The filter plate 201 will filter the air entering through the connecting pipeline 5 to prevent the pores of the adsorption column 3 from being blocked by the dust generated during the production process after long-term use.

[0034] The two adsorption tanks 2 are respectively named "No. 1 tank body" and "No. 2 tank body"; In the initial state, the sealing blocks 13 on the intake branch pipe 501 connected to the "No. 1 tank body" are in contact with each other to block the main pipeline 4 and the connecting pipeline 5, so that the gas cannot enter the "No. 1 tank body"; while the sealing blocks 13 on the intake branch pipe 501 connected to the "No. 2 tank body" move away from each other to conduct the main pipeline 4 and the connecting pipeline 5; thus, the gas can enter the "No. 2 tank body".

[0035] First, the air extraction mechanism operates to accelerate the air flow, so as to pump the air in the main pipeline 4 into the "No. 2 tank body" for adsorption and purification in the "No. 2 tank body"; Meanwhile, the air extraction mechanism drives the switching structure to act, so as to alternately drive the two opening and closing mechanisms to act. The switching mechanism first drives the sealing blocks 13 on the "second tank body" to gradually approach each other to block the gas from entering the "second tank body". When the sealing blocks 13 on the "second tank body" are in contact with each other, the switching mechanism stops driving the opening and closing mechanism on the "second tank body" and instead drives the opening and closing mechanism on the "first tank body", driving the sealing blocks 13 to move away from each other to conduct the "first tank body" and the main pipeline 4, so that the gas can enter the "first tank body" for adsorption and purification.

[0036] The air extraction mechanism accelerates the air flow to improve the adsorption and purification efficiency. Through the mutual cooperation of the air extraction mechanism, the switching mechanism and the opening and closing mechanism, efficient gas purification can be achieved. The automatic switching mechanism ensures the continuous operation of the system and avoids intermittent shutdowns caused by the saturation of a single adsorption bed. Due to the direct connection and cooperation between the various functional components, without reducing the production efficiency, it avoids the problem of low cooperation accuracy caused by phenomena such as signal conduction delay and jamming of moving parts in the coordination of multiple drive components by the industrial control host using logical programs, and reduces the risk of disorder in the cooperation relationship between the components during the operation of the equipment.

[0037] In another embodiment of the present invention, the air extraction mechanism includes a motor 7 and a suction fan 8 installed on the base 1. The output end of the motor 7 is fixedly connected to the suction fan 8. The intake end of the suction fan 8 is communicated with the exhaust pipeline 6.

[0038] Taking the embodiment combined with all the features described in this application as an example, when in use, the motor 7 is started, and the motor 7 drives the suction fan 8 to act to pump the air in the adsorption tank 2 into the exhaust pipeline 6. When the gas passes through the adsorption column 3, the VOCs will be adsorbed by the adsorption column 3, so that the VOCs content of the gas entering the exhaust pipeline 6 from the adsorption tank 2 is reduced; and it accelerates the air flow in the main pipeline 4 into the adsorption tank 2. The air extraction mechanism accelerates the air flow to improve the adsorption and purification efficiency.

[0039] In another embodiment of the present invention, the opening and closing mechanism further includes a full gear 12 rotatably installed on the intake branch pipe 501. A chute 1201 is provided on the full gear 12. A protruding column 1301 slidably engaged with the chute 1201 is installed on the sealing block 13.

[0040] Taking the embodiment combined with all the features described in this application as an example, when in use, the chute 1201 is arc-shaped, and its arc radius is the length of the line connecting the axis of the protruding column 1301 and the rotation center of the sealing block 13 when the sealing blocks 13 are in contact with each other. And multiple groups of chutes 1201 are communicated with each other in a "plum blossom" shape.

[0041] When the full gear 12 rotates, it will drive the slide groove 1201 to rotate. For the "No. 1 tank body", the initial position of the protruding column 1301 thereon is located at the connecting end of the two slide grooves 1201. The rotating slide groove 1201 will slide with the protruding column 1301 and continuously squeeze the protruding column 1301 to rotate the sealing block 13, thereby making the sealing blocks 13 move away from each other, so that the "No. 1 tank body" and the main pipeline 4 change from a blocked state to a conductive state; when the full gear 12 stops rotating, the protruding column 1301 is just located at the top of the arc of the slide groove 1201.

[0042] For the "No. 2 tank", the initial position of the protruding column 1301 thereon is located at the top of the arc of the chute 1201. The rotating chute 1201 will slide with the protruding column 1301 and continuously squeeze the protruding column 1301, so that the sealing block 13 stands east, so that the sealing blocks 13 that were originally far away from each other gradually rotate close to each other, so that the connection state between the "No. 2 tank" and the main pipeline 4 changes to a blocked state. When the full gear 12 stops rotating, the protruding column 1301 is just located at the connecting end of the two chute 1201; and at this time, the sealing blocks 13 conflict with each other.

[0043] Since the squeezing force of the air flow on the sealing block 13 will not drive the sealing block 13 to rotate, after the full gear 12 stops rotating, the opening and closing mechanism has a good self-locking ability, which can prevent the pipeline from being completely blocked or opened, thereby improving the purification efficiency.

[0044] In another embodiment of the present invention, the switching mechanism includes a first rotating shaft 9, a second rotating shaft 10 and a third rotating shaft 11 rotatably mounted on the base 1; a second pulley 901 and a third pulley 902 are mounted on the first rotating shaft 9; a fourth pulley 1002 is mounted on the second rotating shaft 10; a first pulley 701 is mounted on the output end of the motor 7; the first pulley 701 and the second pulley 901 are connected by a belt; the third pulley 902 and the fourth pulley 1002 are connected by a belt; a worm 1001 is mounted on the second rotating shaft 10; a worm wheel 1101 meshing with the worm 1001 is mounted on the third rotating shaft 11; and half gears 1102 meshing with the full gear 12 are mounted at both ends of the third rotating shaft 11.

[0045] In another embodiment of the present invention, the two half gears 1102 are offset from each other; that is, when one half gear 1102 is meshed with one full gear 12 , the other half gear 1102 is disengaged from the other full gear 12 .

[0046] Taking the embodiment combining all the features recorded in the present application as an example, when in use, when the motor 7 rotates, it will drive the first pulley 701 to rotate, thereby driving the second pulley 901 to rotate, thereby driving the first rotating shaft 9 to rotate, and driving the third pulley 902 to rotate.

[0047] The rotating third pulley 902 drives the fourth pulley 1002 to rotate, thereby driving the second rotating shaft 10 to rotate, and thus driving the worm 1001 to rotate.

[0048] When the worm 1001 rotates, it drives the worm wheel 1101 to rotate through meshing, thereby driving the third rotating shaft 11 to rotate, thereby driving the two half gears 1102 to rotate.

[0049] Among them, the toothed part of the half gear 1102 close to the "No. 2 tank body" will first mesh with the full gear 12 on the "No. 2 tank body", thereby driving the sealing blocks 13 on the "No. 2 tank body" to approach each other; when the sealing blocks 13 collide with each other, the toothed part of the half gear 1102 just disengages from the full gear 12; during this process, the toothed part of the half gear 1102 close to the "No. 1 tank body" does not mesh with the full gear 12.

[0050] Afterwards; the toothed portion of the half gear 1102 close to "tank body No. 1" will mesh with the full gear 12 on the "tank body No. 1", thereby driving the sealing block 13 on the "tank body No. 1" to move away from each other; when the protruding column 1301 slides to the top of the arc of the slide groove 1201, the toothed portion of the half gear 1102 will disengage from the full gear 12, and during this process, the toothed portion of the half gear 1102 close to the "tank body No. 2" will not mesh with the full gear 12.

[0051] The air flow is accelerated by the air extraction mechanism to improve the adsorption purification efficiency; the efficient gas purification can be achieved through the cooperation between the air extraction mechanism, the switching mechanism and the opening and closing mechanism; the automatic switching mechanism ensures the continuous operation of the system and avoids intermittent shutdown caused by the saturation of a single adsorption bed; Since there are direct connections and coordination between the various functional components, without reducing production efficiency, the problem of low coordination accuracy caused by signal transmission delays, jamming of moving parts, etc. when coordinating the coordination between multiple drive components through the industrial control host using logic programs is avoided, thereby reducing the risk of confusion in the coordination relationship between components when the equipment is running.

[0052] In another embodiment of the present invention, a third guide column 502 is installed in the connecting pipe 5; an intake piston 20 that is slidingly and sealingly connected to the intake branch pipe 501 is slidably installed on the third guide column 502; a second spring 21 is wrapped around the third guide column 502; and both ends of the second spring 21 respectively contact the intake piston 20 and the third guide column 502.

[0053] In another embodiment of the present invention, a steam inlet pipe 204 is installed on the adsorption tank 2; a first guide column 202 and a second guide column 203 are installed in the adsorption tank 2; an exhaust piston 19 is slidably installed on the first guide column 202; the exhaust piston 19 is slidably and sealedly connected to the exhaust pipe 6; a steam inlet piston 14 is slidably installed on the second guide column 203; the steam inlet piston 14 is slidably and sealedly connected to the steam inlet pipe 204; a first spring 15 is wrapped around the second guide column 203; the two ends of the first spring 15 respectively contact the steam inlet piston 14 and the second guide column 203.

[0054] In another embodiment of the present invention, a rotating connecting rod 16 is rotatably installed in the adsorption tank 2; a first telescopic column 17 hinged to the steam inlet piston 14 is slidably installed at one end of the rotating connecting rod 16; and a second telescopic column 18 hinged to the exhaust piston 19 is slidably installed at the other end of the rotating connecting rod 16.

[0055] Taking the embodiment combining all the features described in this application as an example, when in use, when the exhaust fan 8 is activated, the air in the adsorption tank 2 will be firstly sucked out, so that negative pressure is formed in the adsorption tank 2. Under the action of the pressure, the intake piston 20 will slide toward the connecting pipe 5, thereby connecting the intake branch pipe 501 and compressing the second spring 21 at the same time.

[0056] After the opening and closing mechanism blocks the air intake branch pipe 501, the pressure in the tank body is restored, and under the elastic force of the second spring 21, the air intake piston 20 slides away from the connecting pipe 5 to complete the reset.

[0057] Since the adsorption column 3 will be saturated after long-term use, the adsorption efficiency is reduced.

[0058] At this time, the vacuum mechanism needs to stop working and connect the recovery device to the steam inlet pipe 204; the recovery device will inject a large amount of high-temperature steam into the adsorption tank 2; the injected high-temperature steam will push the steam inlet piston 14 to slide into the adsorption tank 2.

[0059] During the sliding process of the steam inlet piston 14, the rotating connecting rod 16 is driven to rotate, and the first telescopic column 17 is driven to slide in the direction of the rotating connecting rod 16, and the first telescopic column 17 is rotated and cooperated with the steam inlet piston 14; thereby, the second telescopic column 18 is driven to slide in the direction of the exhaust piston 19, and the second telescopic column 18 is rotated and cooperated with the exhaust piston 19, so that the exhaust piston 19 slides in the direction of the exhaust pipe 6, thereby blocking the exhaust pipe 6 to prevent high-temperature steam from leaking from the exhaust pipe 6.

[0060] The high-temperature steam will gather in the adsorption tank 2 and recover the VOCs in the adsorption column 3, and then be discharged into the condensation system through the recovery pipe 22. The whole process does not require manual operation, which can effectively improve the recovery efficiency.

[0061] In another embodiment of the present invention, a fence 101 is installed on the base 1.

[0062] Taking the embodiment combined with all the features described in this application as an example, during use, the fence 101 can protect the adsorption bed and avoid damage to the structure of the adsorption bed caused by external interference, thereby improving the service life and stability of the adsorption bed.

[0063] A process for treating VOCs gas by a double-group automatically switched gas purification adsorption bed as described above includes the following steps: Step 1: The air extraction mechanism operates to pump the air containing VOCs gas in the main pipeline 4 into the adsorption tanks 2 where the sealing blocks 13 are away from each other; and pump the air in this adsorption tank 2 into the exhaust pipeline 6; during this process, the adsorption column 3 will adsorb VOCs to reduce the VOCs content of the air pumped into the exhaust pipeline 6. Step 2: The air extraction mechanism will drive the switching mechanism to operate, so as to drive the two opening and closing mechanisms to operate, so that the sealing blocks 13 that are away from each other approach each other; at the same time, the sealing blocks 13 that are in contact with each other move away from each other; to close one adsorption tank 2 and open the other adsorption tank 2. Step 3: The air extraction mechanism continues to operate to pump the air containing VOCs gas in the main pipeline 4 into the adsorption tanks 2 where the sealing blocks 13 are away from each other; and pump the air in this adsorption tank 2 into the exhaust pipeline 6; during this process, the adsorption column 3 will adsorb VOCs to reduce the VOCs content of the air pumped into the exhaust pipeline 6.

[0064] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0065] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-group automatically switched gas purification adsorption bed, comprising a base (1); two groups of symmetrically arranged adsorption tanks (2) and a main pipeline (4) and a recovery pipeline (22) are mounted on the base (1); It is characterized in that A filter plate (201) and an adsorption column (3) are installed in the adsorption tank (2); A connecting pipe (5) is installed at the bottom end of the adsorption tank (2); an intake branch pipe (501) connected to the main pipe (4) is installed on the connecting pipe (5); the other end of the connecting pipe (5) is connected to the recovery pipe (22); Both of the two connecting pipes (5) are provided with an opening and closing mechanism; the opening and closing mechanism comprises a plurality of sealing blocks (13) rotatably mounted on the air intake branch pipe (501); the plurality of sealing blocks (13) can move away from or close to each other to open or block the connecting pipe (5) and the main pipe (4); An exhaust pipe (6) is installed at the top of the adsorption tank (2); The base (1) is provided with an exhaust mechanism; when the exhaust mechanism is in operation, the gas in the main pipeline (4) can be exhausted into the adsorption tank (2), and the gas in the adsorption tank (2) can be exhausted into the exhaust pipeline (6); A switching mechanism is also provided in the base (1); the switching mechanism can drive the two opening and closing mechanisms to move alternately when the air extraction mechanism moves.

2. A dual-group automatically switched gas purification adsorption bed according to claim 1, characterized in that: The air extraction mechanism comprises a motor (7) and an exhaust fan (8) mounted on the base (1); an output end of the motor (7) is fixedly connected to the exhaust fan (8); and an air inlet end of the exhaust fan (8) is connected to the exhaust duct (6).

3. A dual-group automatically switched gas purification adsorption bed according to claim 2, characterized in that: The opening and closing mechanism further comprises a full gear (12) rotatably mounted on the intake branch pipe (501); a slide groove (1201) is provided on the full gear (12); and a protruding column (1301) slidably engaged with the slide groove (1201) is mounted on the sealing block (13).

4. A dual-group automatically switched gas purification adsorption bed according to claim 3, characterized in that: The switching mechanism comprises a first rotating shaft (9), a second rotating shaft (10) and a third rotating shaft (11) rotatably mounted on the base (1); a second pulley (901) and a third pulley (902) are mounted on the first rotating shaft (9); a fourth pulley (1002) is mounted on the second rotating shaft (10); a first pulley (701) is mounted on the output end of the motor (7); the first pulley (701) and the second pulley (901) are connected via a belt; the third pulley (902) and the fourth pulley (1002) are connected via a belt; a worm (1001) is mounted on the second rotating shaft (10); a worm wheel (1101) meshing with the worm (1001) is mounted on the third rotating shaft (11); and half gears (1102) meshing with the full gear (12) are mounted at both ends of the third rotating shaft (11).

5. A dual-group automatically switched gas purification adsorption bed according to claim 4, characterized in that: The two half gears (1102) are offset from each other; that is, when one half gear (1102) is meshed with one full gear (12), the other half gear (1102) is disengaged from the other full gear (12).

6. A dual-group automatically switched gas purification adsorption bed according to claim 1, characterized in that: A third guide column (502) is installed in the connecting pipe (5); an intake piston (20) is slidably installed on the third guide column (502) and is slidably sealed with the intake branch pipe (501); a second spring (21) is wrapped around the third guide column (502); and two ends of the second spring (21) are respectively in contact with the intake piston (20) and the third guide column (502).

7. A dual-group automatically switched gas purification adsorption bed according to claim 1, characterized in that: The adsorption tank (2) is provided with a steam inlet pipe (204); a first guide column (202) and a second guide column (203) are provided in the adsorption tank (2); an exhaust piston (19) is slidably provided on the first guide column (202); the exhaust piston (19) is slidably and sealingly connected to the exhaust pipe (6); a steam inlet piston (14) is slidably provided on the second guide column (203); the steam inlet piston (14) is slidably and sealingly connected to the steam inlet pipe (204); a first spring (15) is wrapped around the second guide column (203); two ends of the first spring (15) are in contact with the steam inlet piston (14) and the second guide column (203), respectively.

8. A dual-group automatically switched gas purification adsorption bed according to claim 7, characterized in that: A rotating connecting rod (16) is rotatably mounted in the adsorption tank (2); a first telescopic column (17) hinged to the steam inlet piston (14) is slidably mounted on one end of the rotating connecting rod (16); and a second telescopic column (18) hinged to the exhaust piston (19) is slidably mounted on the other end of the rotating connecting rod (16).

9. The dual-group automatically switched gas purification adsorption bed according to claim 1, characterized in that: A fence (101) is installed on the base (1).

10. A process for treating VOCs gas using a dual-group automatically switched gas purification adsorption bed as described in any one of claims 1 to 9, characterized in that: The steps include: Step 1: The air extraction mechanism operates to extract the air containing VOCs gas in the main pipeline (4) into the adsorption tank (2) which is separated from each other by the sealing block (13); and the air in the adsorption tank (2) is extracted into the exhaust pipeline (6); during this process, the adsorption column (3) will absorb VOCs to reduce the VOCs content of the air extracted into the exhaust pipeline (6); Step 2: the air extraction mechanism drives the switching mechanism to move, thereby driving the two opening and closing mechanisms to move, so that the sealing blocks (13) that are far away from each other move closer to each other; at the same time, the sealing blocks (13) that are in conflict with each other move away from each other; so as to close one adsorption tank (2) and open the other adsorption tank (2); Step 3: The exhaust mechanism continues to operate to extract the air containing VOCs gas in the main pipeline (4) into the adsorption tank (2) that is separated from each other by the sealing block (13); and the air in the adsorption tank (2) is extracted into the exhaust pipeline (6); during this process, the adsorption column (3) will absorb VOCs to reduce the VOCs content of the air extracted into the exhaust pipeline (6).

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