A cyclic activated carbon adsorption waste gas treatment device

Abstract

The present invention specifically relates to a circulating activated carbon adsorption waste gas treatment device, which belongs to the technical field of separation and filtration equipment. It includes a main cylinder body, a secondary cylinder body integrally provided on one side of the main cylinder body, and a water filtration system connected to one side of the main cylinder body. The water filtration system is used to perform water filtration on the gas entering the main cylinder body. An opening for air intake is provided on the upper side of the main cylinder body. An air intake hopper for air intake is connected to the lower side of the secondary cylinder body, allowing waste gas to enter the secondary cylinder body through the air intake hopper. A wind pipe is connected to one side of the main cylinder body, and a first fan is installed on the wind pipe. A second fan is installed on the secondary cylinder body, enabling both the main cylinder body and the secondary cylinder body to have the function of absorbing waste gas. Among them, a fixed air filter pipe connected in communication is longitudinally installed at the bottom end of the wind pipe, and a plurality of movable air filter pipes distributed in a stepped manner are slidably connected to the front of the fixed air filter pipe in the front and back directions.

Description

Technical Field

[0001] The present invention specifically relates to a circulating activated carbon adsorption waste gas treatment device, which relates to the field of industrial waste gas treatment. Background Art

[0002] In the field of industrial waste gas treatment, activated carbon has long been widely used as a core adsorption material due to its developed pore structure and large specific surface area. However, the activated carbon in traditional treatment devices generally adopts a single fixed bed layer design, and the adsorption capacity of a single activated carbon plate is limited. When the waste gas treatment volume exceeds the original quantity, the filtering effect will be greatly reduced, especially for some waste gases with higher concentrations, resulting in a low adsorption rate, difficulty in coping with different air volume conditions, and the existing structure cannot achieve the switching of the circulating filtration state. The adsorption and filtration effect needs to be improved, and the flexibility is low, seriously affecting the use effect of waste gas treatment. Therefore, there is an urgent need to propose a circulating activated carbon adsorption waste gas treatment device to improve the above problems. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a circulating activated carbon adsorption waste gas treatment device to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention is realized through the following technical solutions: A circulating activated carbon adsorption waste gas treatment device includes a main cylinder body, a secondary cylinder body integrally provided on one side of the main cylinder body, and a water filtration system connected to one side of the main cylinder body. An opening for air intake is provided on the upper side of the main cylinder body. An air intake hopper for air intake is connected to the lower side of the secondary cylinder body. A duct is connected to one side of the main cylinder body, a first fan is installed on the duct, a second fan is installed on the secondary cylinder body, and a fixed air filter pipe connected in series is longitudinally installed at the bottom end of the duct;

[0005] A plurality of movable air filter pipes distributed in a stepped manner are slidably connected back and forth at the front end of the fixed air filter pipe. When the movable air filter pipes slide backward, they are connected to the fixed air filter pipe to form a multi-stage filtration circulation channel. When the movable air filter pipes slide forward, they respectively form independent filtered air outlet channels with the fixed air filter pipe;

[0006] Adjacent movable air filter pipes are slidably connected and communicated with each other back and forth, and an insertion pipe is installed at the top end of each movable air filter pipe. The insertion pipe passes through the secondary cylinder body and one side of the main cylinder body movably, and a side air hole communicated with the secondary cylinder body is opened on one side of the end of the insertion pipe. The insertion pipe switches between communication with the secondary cylinder body or the main cylinder body as the movable air filter pipe moves back and forth, for switching the blowing or suction state of the insertion pipe.

[0007] For a further improved solution, a first activated carbon filter plate is installed in the middle of the fixed air filter pipe, and an air outlet pipe opening is provided on the lower side of the end of the fixed air filter pipe away from the air duct. Two groups of second activated carbon filter plates are installed inside the movable air filter pipe, and an electric air valve is installed in the middle of one side of the movable air filter pipe, and this electric air valve is located between the two groups of second activated carbon filter plates.

[0008] For a further improved solution, when the movable air filter pipe moves forward to drive the corresponding insertion pipe to communicate with the auxiliary cylinder body, the electric air valve corresponding to the movable air filter pipe opens. When the movable air filter pipe moves backward to drive the corresponding insertion pipe to communicate with the main cylinder body, the electric air valve corresponding to the movable air filter pipe closes.

[0009] For a further improved solution, a pushing group for pushing the adjacent movable air filter pipe below to move back and forth is installed on the front sides of both the fixed air filter pipe and the movable air filter pipe. This pushing group includes telescopic rods longitudinally installed at the front ends of the fixed air filter pipe and the movable air filter pipe and multiple horizontal guide rods. A vertical block is fixedly provided on the upper side of the movable air filter pipe. The horizontal guide rods are arranged through the vertical blocks of the adjacent movable air filter pipe below, and the telescopic end of the telescopic rod is fixedly connected to the vertical block of the adjacent movable air filter pipe below.

[0010] For a further improved solution, the water filtration system includes a filtration water tank and a guide plate inclinedly installed inside the main cylinder body. A liquid storage tank is provided on one side of the top of the guide plate. The bottom of the filtration water tank is connected to a water inlet pipe through a water pump, and this water inlet pipe is connected to one side of the main cylinder body and is arranged on one side of the liquid storage tank. The top of the filtration water tank is connected to a return pipe through a water pump, and the end of this return pipe is connected and communicated with the bottom end of the main cylinder body. The pipe orifice of the air duct is arranged on the lower inner side of the guide plate.

[0011] For a further improved solution, a plurality of horizontal pipes are installed inside the auxiliary cylinder body, and a communication hole communicating with the auxiliary cylinder body is provided in the middle of the horizontal pipes. One end of the horizontal pipe is connected and communicated with the main cylinder body, the insertion pipe slides through the other end of the horizontal pipe, and the side air holes of the insertion pipe are correspondingly communicated with the communication holes.

[0012] For a further improved solution, corresponding communication interfaces are provided on the opposite sides of the adjacent movable air filter pipes up and down, and the upper side of the topmost movable air filter pipe is correspondingly communicated with the air outlet pipe opening of the fixed air filter pipe through the interface.

[0013] For a further improved solution, the insertion pipe penetrates through the middle of the upper side of the vertical block and is communicated with the inner cavity of the movable air filter pipe. The second activated carbon filter plate is located between the port of the insertion pipe and the interface.

[0014] For a further improved solution, a piston is installed on one side of the top end of the insertion pipe, and this piston can be adapted to be tightly plugged inside the horizontal pipe.

[0015] A further improved solution, the movable air filter tube includes a first movable air filter tube, a second movable air filter tube and a third movable air filter tube, and the corresponding insertion tubes are respectively set as a first insertion tube, a second insertion tube and a third insertion tube. The pushing group on the fixed air filter tube pushes and pulls the first movable air filter tube and the first insertion tube to slide back and forth, the pushing group on the first movable air filter tube pushes and pulls the second movable air filter tube and the second insertion tube to slide back and forth, and the pushing group of the second movable air filter tube pushes and pulls the third movable air filter tube and the third insertion tube to slide back and forth.

[0016] By adopting the above technical solution, the present invention has the following advantages:

[0017] The treatment device of the present invention has multiple switching usage states: the first is the double-path separate filtration state, in which both the main cylinder and the auxiliary cylinder can inhale waste gas. In the case of no switching state, the main cylinder mainly sends the waste gas into the fixed air filter tube to be separately filtered by the first activated carbon filter plate once, while the auxiliary cylinder sends the waste gas into the second activated carbon filter plates of each movable air filter tube through multiple insertion tubes for shunt filtration. In this state, the filtration efficiency of the treatment device can be greatly improved;

[0018] The second is the circulating filtration state. When the first movable air filter tube moves backward, it can drive all the connected second movable air filter tubes and third movable air filter tubes to move backward, so that the interface of the first movable air filter tube is connected to the air outlet pipe of the fixed air filter tube, and the ends of the first insertion tube, the second insertion tube and the third insertion tube are inserted into the main cylinder. The side air holes are switched from being connected to the auxiliary cylinder to being connected to the auxiliary cylinder, and the second fan and each electric air valve are closed. The waste gas that has been filtered once by the fixed air filter tube can enter each movable air filter tube for multiple filtrations, and the filtered gas is sent back to the main cylinder for re-circulating filtration again, which can greatly improve the circulating filtration effect and efficiency of the waste gas;

[0019] The third is the combined filtration state. In the above second circulating filtration state, by controlling the second movable air filter tube or the third movable air filter tube to move forward, the interfaces of two adjacent movable air filter tubes can be staggered and closed, so that the second insertion tube or the third insertion tube is re-connected to the auxiliary cylinder, and the second fan and the corresponding electric air valves are opened, so that the device can carry out circulating filtration and separate filtration simultaneously, which can be used in environments with different waste gas concentration amounts, and the usage flexibility is greatly improved;

[0020] And during the above filtration, the waste gas to be filtered in the main cylinder can be subjected to dust precipitation filtration through the water filtration system, that is, the waste gas in the main cylinder needs to be subjected to dust precipitation filtration in each state, which further improves the pretreatment and filtration effects. Description of the Drawings

[0021] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a schematic plan view of the main structure in the double - path independent filtration state of the present invention;

[0024] Figure 3 is the present invention Figure 2 schematic structural diagram of A in;

[0025] Figure 4 is a schematic structural diagram of the present invention in the circulating filtration state;

[0026] Figure 5 is a schematic structural diagram of the present invention in the combined filtration state;

[0027] Figure 6 is a schematic structural diagram of another perspective of the figure of the present invention;

[0028] In the figure: main cylinder body 1, secondary cylinder body 2, air inlet hopper 21, second fan 22, horizontal pipe 23, communication hole 24, water filtration system 3, liquid storage tank 31, guide plate 32, filtration water tank 33, water inlet pipe 34, water return pipe 35, air duct 4, first fan 41, fixed air filter pipe 5, first activated carbon filter plate 51, air outlet pipe opening 52, movable air filter pipe 6, interface 60, first movable air filter pipe 61, second movable air filter pipe 62, third movable air filter pipe 63, second activated carbon filter plate 64, electric air valve 65, vertical block 66, insertion pipe 7, side air holes 70, piston 701, first insertion pipe 71, second insertion pipe 72, third insertion pipe 73, pushing group 8, telescopic rod 81, horizontal guide rod 82. Detailed Embodiments

[0029] To make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0030] Such as Figure 1-6As shown in the figure, the present invention provides a cyclic activated carbon adsorption waste gas treatment device, which includes a main cylinder body 1, a secondary cylinder body 2 integrally provided on one side of the main cylinder body 1, and a water filtration system 3 connected to one side of the main cylinder body 1. The water filtration system 3 is used to filter water for the gas entering the main cylinder body 1. An opening for air intake is provided on the upper side of the main cylinder body 1. An air intake hopper 21 for air intake is connected to the lower side of the secondary cylinder body 2, so that waste gas can enter the secondary cylinder body 2 through the air intake hopper 21. A duct 4 is connected to one side of the main cylinder body 1, and a first fan 41 is installed on the duct 4. A second fan 22 is installed on the secondary cylinder body 2, so that both the main cylinder body 1 and the secondary cylinder body 2 have the function of absorbing waste gas. Among them, a fixed air filter pipe 5 connected in series is longitudinally installed at the bottom end of the duct 4. A plurality of movable air filter pipes 6 distributed in a stepped manner are slidably connected to the front of the fixed air filter pipe 5 in the front and back directions. Moreover, adjacent movable air filter pipes 6 are slidably connected to each other in the front and back directions and are communicated with each other. And a plug pipe 7 is installed at the top end of each movable air filter pipe 6. The plug pipe 7 passes through the secondary cylinder body 2 and one side of the main cylinder body 1 movably, and a side air hole 70 communicated with the secondary cylinder body 2 is opened on one side of the end of the plug pipe 7. The plug pipe 7 switches between communicating with the secondary cylinder body 2 or the main cylinder body 1 as the movable air filter pipe 6 moves back and forth, for switching the blowing or suction state of the plug pipe 7. When blowing, the waste gas is mainly blown from the plug pipe 7 to each movable air filter pipe 6 for filtration. When sucking, the waste gas is mainly sent into the main cylinder body 1 and filtered again through the water filtration system 3 and the fixed air filter pipe 5.

[0031] When the movable air filter pipe 6 slides backward, it is communicated with the fixed air filter pipe 5 to form a multi-stage filtration circulation channel, that is, the second cyclic filtration state. When the movable air filter pipe 6 moves backward and drives the corresponding plug pipe 7 to communicate with the main cylinder body 1, the electric air valve 65 corresponding to the movable air filter pipe 6 is closed. In this state, the waste gas filtered by the fixed air filter pipe 5 once can enter each movable air filter pipe 6 for multiple filtrations, and the filtered gas is sent back into the main cylinder body 1 for re-circulation filtration, which can greatly improve the cyclic filtration effect and efficiency of the waste gas.

[0032] When the movable air filter pipe 6 slides forward, it forms a separate filtration air outlet channel with the fixed air filter pipe 5 respectively. When the movable air filter pipe 6 moves forward and drives the corresponding plug pipe 7 to communicate with the secondary cylinder body 2, the electric air valve 65 corresponding to the movable air filter pipe 6 is opened, that is, the first double-path separate filtration state is formed. At this time, both the main cylinder body 1 and the secondary cylinder body 2 can inhale waste gas. The main cylinder body 1 mainly sends the waste gas into the fixed air filter pipe 5 and is separately filtered once by the first activated carbon filter plate 51, while the secondary cylinder body 2 sends the waste gas into the second activated carbon filter plates 64 of each movable air filter pipe 6 through a plurality of plug pipes 7 for shunt filtration, and the waste gas is filtered in two paths. In this state, the filtration efficiency of the treatment device can be greatly improved.

[0033] Specifically, the movable air filter tube 6 includes a first movable air filter tube 61, a second movable air filter tube 62, and a third movable air filter tube 63. The corresponding insertion tubes 7 of the first movable air filter tube 61, the second movable air filter tube 62, and the third movable air filter tube 63 are respectively set as a first insertion tube 71, a second insertion tube 72, and a third insertion tube 73. The pushing group 8 on the fixed air filter tube 5 pushes and pulls the first movable air filter tube 61 and the first insertion tube 71 to slide back and forth. The pushing group 8 on the first movable air filter tube 61 pushes and pulls the second movable air filter tube 62 and the second insertion tube 72 to slide back and forth. The pushing group 8 of the second movable air filter tube 62 pushes and pulls the third movable air filter tube 63 and the third insertion tube 73 to slide back and forth. This setting allows the first movable air filter tube 61, the second movable air filter tube 62, and the third movable air filter tube 63 to flexibly switch states and achieve the required circulation, filtration, and exhaust effects.

[0034] Among them, a first activated carbon filter plate 51 is installed in the middle of the fixed air filter tube 5 for primary filtration and adsorption. An air outlet 52 is provided on the lower side of the end of the fixed air filter tube 5 away from the air duct 4. Two groups of second activated carbon filter plates 64 are installed inside the movable air filter tube 6. An electric air valve 65 is installed in the middle of one side of the movable air filter tube 6. The electric air valve 65 is located between the two groups of second activated carbon filter plates 64. This setting allows that when the electric air valve 65 is opened, no matter from which direction the waste gas flows, it needs to pass through the second activated carbon filter plates 64 for filtration. And for the second cycle filtration state of the two groups of second activated carbon filter plates 64, the waste gas passing through the movable air filter tube 6 can better improve its filtration effect.

[0035] In order to stably control the back-and-forth sliding of each movable air filter tube 6, a pushing group 8 for pushing and pulling the adjacent movable air filter tube 6 below to move back and forth is installed on the front side of the fixed air filter tube 5 and the front side of the movable air filter tube 6. The pushing group 8 includes a telescopic rod 81 longitudinally installed at the front end of the fixed air filter tube 5 and the front end of the movable air filter tube 6, and four horizontal guide rods 82. A vertical block 66 is fixedly provided on the upper side of the movable air filter tube 6. The horizontal guide rods 82 pass through the vertical block 66 of the adjacent movable air filter tube 6 below. The telescopic end of the telescopic rod 81 is fixedly connected to the vertical block 66 of the adjacent movable air filter tube 6 below, so that the telescopic rod 81 on the fixed air filter tube 5 can push the first movable air filter tube 61 to move back and forth on the four horizontal guide rods 82. The first movable air filter tube 61 can push the second movable air filter tube 62 to move back and forth on the four horizontal guide rods 82 through the telescopic rod 81. The second movable air filter tube 62 can push the third movable air filter tube 63 to move back and forth on the four horizontal guide rods 82 through the telescopic rod 81, thereby controlling the connection situation of the fixed air filter tube 5, the first movable air filter tube 61, the second movable air filter tube 62, and the third movable air filter tube 63. This method is simpler and more flexible, and very convenient to use and adjust.

[0036] Furthermore, the water filtration system 3 includes a filtration water tank 33 and a guiding plate 32 which is inclinedly installed inside the main cylinder body 1. The guiding plate 32 can also be a corrugated guiding plate. A liquid storage tank 31 is arranged on one side at the top of the guiding plate 32. The bottom of the filtration water tank 33 is connected to a water inlet pipe 34 through a water pump. The water inlet pipe 34 is connected to one side of the main cylinder body 1 and is arranged on one side of the liquid storage tank 31. Therefore, the filtration water tank 33 sends the filtered water into the liquid storage tank 31 through the water pump and the water inlet pipe 34. A porous weir plate can be arranged in the tank to make the water flow evenly distributed, ensuring a stable overflow after the liquid level reaches the designed height. The water in the liquid storage tank 31 overflows upward and forms a water curtain slanting downward along the guiding plate 32. The inclination angle of the guiding plate 32 can be 30-60°. A V-shaped guiding groove with a depth of 0.5 mm can be machined on the upper surface of the guiding plate 32, so that the downward flowing water forms a continuous water film under the action of gravitational acceleration, which is beneficial to increasing the coverage area of the water curtain. When the dusty waste gas penetrates through the water curtain, it can be effectively dust-settled. The top of the filtration water tank 33 is connected to a water return pipe 35 through a water pump. The end of the water return pipe 35 is communicated with the bottom end of the main cylinder body 1. The pipe orifice of the air duct 4 is arranged at the lower side inside the guiding plate 32. The waste water after dust-settling filtration enters the fixed air filter pipe 5 through the pipe orifice of the air duct 4, and the waste water flows back to the filtration water tank 33 from the bottom of the main cylinder body 1. A three-stage stepped filter bed arranged in the filtration water tank 33, mainly composed of a 20-mesh stainless steel mesh, a bentonite filter layer and activated carbon fibers, can intercept suspended substances on a large area. The filtered water is sent into the liquid storage tank 31 again by the water pump and the water inlet pipe 34 at the bottom of the filtration water tank 33 for cyclic filtration use, greatly saving the input cost.

[0037] Moreover, in order to enable the insertion tube 7 to stably perform forward and backward sliding displacement, three horizontal pipes 23 are installed inside the secondary cylinder body 2. A communication hole 24 communicating with the secondary cylinder body 2 is opened in the middle of the horizontal pipe 23. One end of the horizontal pipe 23 is communicated with the main cylinder body 1. The insertion tube 7 is slidably inserted through the other end of the horizontal pipe 23. In this way, the horizontal pipe 23 can play a guiding role for the insertion tube 7 and can keep the separation between the main cylinder body 1 and the secondary cylinder body 2, preventing the non-combustible waste gas from flowing mutually. At the same time, the side air holes 70 of the insertion tube 7 are correspondingly communicated with the communication holes 24, enabling the insertion tube 7 to have a communication path with the secondary cylinder body 2 and the main cylinder body 1, and switching the blowing and suction states along with the displacement of the insertion tube 7.

[0038] Moreover, in order to enable the adjacent movable air filter tubes 6 above and below to communicate with each other, corresponding and communicating interfaces 60 are provided on the opposite sides of the movable air filter tubes 6. The upper side of the uppermost movable air filter tube 6 is correspondingly communicated with the air outlet pipe opening 52 of the fixed air filter tube 5 through the interface 60. The shape of the interface 60 is not limited, and the sizes correspond to each other. Among them, the insertion tube 7 penetrates through the middle part of the upper side of the vertical block 66 and communicates with the inner cavity of the movable air filter tube 6. The second activated carbon filter plate 64 is located between the port of the insertion tube 7 and the interface 60. In this way, whether the insertion tube 7 blows air or sucks air, it needs to pass through two groups of second activated carbon filter plates 64 for filtration, and unfiltered exhaust gas will not escape through the opened electric air valve 65. The structure is simple and ingenious.

[0039] In a further improved solution, a piston 701 is installed on one side of the top end of the insertion tube 7. The piston 701 can be fitted and tightly inserted inside the horizontal tube 23. The setting of the piston 701 can make the insertion tube 7 fit more tightly into the horizontal tube 23, improve the sealing effect, and make the main cylinder 1 and the auxiliary cylinder 2 form separate cavities.

[0040] In a more specific implementation manner, the treatment device of the present invention has multiple switching usage states. When using the first double-path separate filtration state: both the first fan 41 and the second fan 22 are started, so that the main cylinder 1 and the auxiliary cylinder 2 set can both suck in exhaust gas. At this time, the filter water tank 33 sends the filtered water into the liquid storage tank 31 through the water pump and the water inlet pipe 34. Porous weir plates can be arranged in the tank to make the water flow evenly distributed, ensuring that a stable overflow is formed after the liquid level reaches the designed height. The water in the liquid storage tank 31 overflows upward and forms a water curtain wall slanting downward along the guide plate 32. When the dust-containing exhaust gas in the main cylinder 1 penetrates through the water curtain wall, it can be effectively dust-settled by the water method. Without switching the state, the first fan 41 sends the pretreated exhaust gas into the fixed air filter tube 5 to be separately filtered once by the first activated carbon filter plate 51, while the auxiliary cylinder 2 sends the exhaust gas into the second activated carbon filter plates 64 of each movable air filter tube 6 through multiple insertion tubes 7 for shunt filtration. In this state, the filtration efficiency of the treatment device can be greatly improved;

[0041] When switching to the second circulating filtration state, the first movable air filter tube 61 is pulled backward by the telescopic rod 81 of the fixed air filter tube 5, which can drive all the connected second movable air filter tubes 62 and third movable air filter tubes 63 to displace backward, so that the interface 60 of the first movable air filter tube 61 is communicated with the air outlet pipe opening 52 of the fixed air filter tube 5, and the ends of the first insertion tube 71, the second insertion tube 72 and the third insertion tube 73 are inserted into the main cylinder 1. The side air holes 70 are switched from communicating with the auxiliary cylinder 2 to communicating with the auxiliary cylinder 2, and the second fan 22 and each electric air valve 65 are closed. In this way, the exhaust gas that has been filtered once by the fixed air filter tube 5 can enter each movable air filter tube 6 for multiple filtrations, and the filtered gas is sent back into the main cylinder 1 for re-circulating filtration, which can greatly improve the circulating filtration effect and efficiency of the exhaust gas;

[0042] When switching to the third combined filtration state, under the above-mentioned second circular filtration state, the forward displacement of the second active air filter tube 62 or the third active air filter tube 63 can be controlled to stagger and seal the interfaces 60 of two adjacent active air filter tubes 6, so that the second insertion tube 72 or the third insertion tube 73 is reconnected to the auxiliary cylinder body 2, and the second fan 22 and the corresponding electric air valve 65 are opened, enabling the device to perform circular filtration and separate filtration simultaneously, which can be used in environments with different exhaust gas concentration amounts, greatly improving the flexibility of use.

[0043] The above embodiments illustrate and describe the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A cyclic activated carbon adsorption waste gas treatment device, characterized in that It includes a main cylinder body (1), a secondary cylinder body (2) integrally provided on one side of the main cylinder body (1), and a water filtration system (3) connected to one side of the main cylinder body (1). An opening for air intake is provided on the upper side of the main cylinder body (1). An air intake hopper (21) for air intake is connected to the lower side of the secondary cylinder body (2). A duct (4) is connected to one side of the main cylinder body (1). A first fan (41) is installed on the duct (4), and a second fan (22) is installed on the secondary cylinder body (2). A fixed air filter pipe (5) that is longitudinally installed at the bottom end of the duct (4) and is connected and communicated is provided. A plurality of movable air filter pipes (6) distributed in a stepped manner are slidably connected to the front end of the fixed air filter pipe (5) in the front and back directions. When the movable air filter pipes (6) slide backward, they are connected and communicated with the fixed air filter pipe (5) to form a multi-stage filtration circulation channel. When the movable air filter pipes (6) slide forward, they respectively form independent filtered air outlet channels with the fixed air filter pipe (5). Adjacent movable air filter pipes (6) are slidably connected to each other in the front and back directions and are communicated. A plug tube (7) is installed at the top end of each movable air filter pipe (6). The plug tube (7) movably penetrates through one side of the secondary cylinder body (2) and the main cylinder body (1). A side air hole (70) communicated with the secondary cylinder body (2) is opened on one side of the end of the plug tube (7). The plug tube (7) switches between communicating with the secondary cylinder body (2) or the main cylinder body (1) as the movable air filter pipe (6) moves back and forth. A first activated carbon filter plate (51) is installed in the middle of the fixed air filter pipe (5). An air outlet of the duct (52) is opened on the lower side of the end of the fixed air filter pipe (5) away from the duct (4). A plurality of cross pipes (23) are installed inside the secondary cylinder body (2). A communication hole (24) communicated with the secondary cylinder body (2) is opened in the middle of the cross pipe (23). One end of the cross pipe (23) is communicated with the main cylinder body (1). The plug tube (7) slides through the other end of the cross pipe (23). The side air hole (70) of the plug tube (7) is correspondingly communicated with the communication hole (24). The plug tube (7) penetrates through the middle of the upper side of the vertical block (66) and is communicated with the inner cavity of the movable air filter pipe (6). A second activated carbon filter plate (64) is located between the port of the plug tube (7) and the interface (60). A piston (701) is installed on one side of the top end of the plug tube (7). The piston (701) can be adapted to tightly plug the inside of the cross pipe (23).

2. The cyclic activated carbon adsorption waste gas treatment equipment according to claim 1, characterized in that, Two groups of second activated carbon filter plates (64) are installed inside the movable air filter pipe (6). An electric air valve (65) is installed in the middle of one side of the movable air filter pipe (6). The electric air valve (65) is located between the two groups of second activated carbon filter plates (64). When the movable air filter pipe (6) moves forward to drive the corresponding plug tube (7) to communicate with the secondary cylinder body (2), the electric air valve (65) corresponding to the movable air filter pipe (6) is opened. When the movable air filter pipe (6) moves backward to drive the corresponding plug tube (7) to communicate with the main cylinder body (1), the electric air valve (65) corresponding to the movable air filter pipe (6) is closed.

3. The cyclic activated carbon adsorption waste gas treatment equipment according to claim 2, characterized in that, A pushing group (8) for pushing the adjacent lower movable air filter tube (6) to move back and forth is installed on the front side of the fixed air filter tube (5) and the front side of the movable air filter tube (6). The pushing group (8) includes a telescopic rod (81) longitudinally installed at the front end of the fixed air filter tube (5) and the front end of the movable air filter tube (6), and a plurality of horizontal guide rods (82). A vertical block (66) is fixedly arranged on the upper side of the movable air filter tube (6). The horizontal guide rod (82) penetrates through the vertical block (66) of the adjacent lower movable air filter tube (6). The telescopic end of the telescopic rod (81) is fixedly connected to the vertical block (66) of the adjacent lower movable air filter tube (6).

4. The cyclic activated carbon adsorption waste gas treatment equipment according to claim 3, characterized in that, The water filtration system (3) includes a filtration water tank (33), and a diversion plate (32) inclinedly installed inside the main cylinder body (1). A liquid storage tank (31) is arranged on one side of the top of the diversion plate (32). The bottom of the filtration water tank (33) is connected to a water inlet pipe (34) through a water pump. The water inlet pipe (34) is connected to one side of the main cylinder body (1) and is arranged on one side of the liquid storage tank (31). The top of the filtration water tank (33) is connected to a water return pipe (35) through a water pump. The end of the water return pipe (35) is communicated with the bottom end of the main cylinder body (1). The pipe orifice of the air duct (4) is arranged at the lower side inside the diversion plate (32).

5. The circulating activated carbon adsorption waste gas treatment equipment according to claim 4, characterized in that, Corresponding communication interfaces (60) are respectively arranged on the opposite sides of the adjacent upper and lower movable air filter tubes (6), and the upper side of the topmost movable air filter tube (6) is correspondingly communicated with the air outlet pipe orifice (52) of the fixed air filter tube (5) through the interface (60).

6. The cyclic activated carbon adsorption waste gas treatment equipment according to claim 5, characterized in that, The movable air filter tube (6) includes a first movable air filter tube (61), a second movable air filter tube (62) and a third movable air filter tube (63), and the corresponding insertion tubes (7) are respectively set as a first insertion tube (71), a second insertion tube (72) and a third insertion tube (73). The pushing group (8) on the fixed air filter tube (5) pushes and pulls the first movable air filter tube (61) and the first insertion tube (71) to slide back and forth. The pushing group (8) on the first movable air filter tube (61) pushes and pulls the second movable air filter tube (62) and the second insertion tube (72) to slide back and forth. The pushing group (8) of the second movable air filter tube (62) pushes and pulls the third movable air filter tube (63) and the third insertion tube (73) to slide back and forth.

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