An activated carbon adsorption and condensation recovery device

Abstract

This application relates to the technical field of organic waste gas treatment, and discloses an activated carbon adsorption and condensation recovery device, which includes an activated carbon adsorption unit, a nitrogen unit and a condensation unit; the activated carbon adsorption unit includes at least two filter tanks, and each of the filter tanks has an activated carbon adsorption component and a trachea group; the trachea group includes an exhaust gas inlet pipe, an exhaust gas outlet pipe, a nitrogen inlet pipe and a nitrogen outlet pipe that are connected to the filter tank. Cut-off valves are provided on all the tracheas in the trachea group, and the nitrogen inlet pipe is connected to the nitrogen unit, and the nitrogen outlet pipe is connected to the condensation unit. This application can improve the efficiency of waste gas treatment.

Description

Technical Field

[0001] The present application relates to the technical field of organic waste gas treatment, and in particular to an activated carbon adsorption and condensation recovery device. Background Art

[0002] Currently, when various chemical substances are processed and analyzed in a chemical laboratory, a large amount of organic waste gas is often generated, and the waste gas needs to be treated by waste gas treatment equipment before it can be discharged.

[0003] Existing waste gas treatment equipment usually adopts the method of activated carbon adsorption + high-temperature nitrogen desorption. The waste gas is adsorbed by an activated carbon adsorption tank and then discharged. After the activated carbon adsorption reaches saturation, high-temperature nitrogen is introduced into the adsorption tank to desorb the organic components adsorbed by the activated carbon. The nitrogen then brings the organic components into a condenser to convert the organic vapor into a liquid organic solvent, achieving the recycling and reuse of the liquid organic solvent.

[0004] However, when nitrogen blows off the activated carbon adsorption tank, the waste gas stops entering the adsorption tank, resulting in the stagnation of waste gas treatment and affecting the waste gas treatment efficiency. Summary of the Invention

[0005] In order to improve the efficiency of waste gas treatment, the present application provides an activated carbon adsorption and condensation recovery device.

[0006] The present application provides an activated carbon adsorption and condensation recovery device, adopting the following technical solutions:

[0007] An activated carbon adsorption and condensation recovery device includes: an activated carbon adsorption unit, a nitrogen unit, and a condensation unit; the activated carbon adsorption unit includes at least two filter tanks, and each filter tank has an activated carbon adsorption component and a trachea group; the trachea group includes an exhaust gas inlet pipe, an exhaust gas outlet pipe, a nitrogen inlet pipe, and a nitrogen outlet pipe connected to the filter tank. Cut-off valves are provided on all the tracheas in the trachea group, and the nitrogen inlet pipe is connected to the nitrogen unit, and the nitrogen outlet pipe is connected to the condensation unit.

[0008] By adopting the above technical solutions, each filter tank has an independent exhaust gas inlet pipe, exhaust gas outlet pipe, nitrogen inlet pipe, and nitrogen outlet pipe, and is equipped with cut-off valves, enabling one filter tank to continue receiving and treating waste gas while nitrogen blows off another filter tank, thus avoiding the stagnation of waste gas treatment and improving the waste gas treatment efficiency. At the same time, the cooperation of the nitrogen unit and the condensation unit enables the organic components to be effectively desorbed and converted into liquid organic solvents, achieving the recycling and reuse of resources.

[0009] Optionally, the exhaust gas inlet pipe and the exhaust gas outlet pipe are respectively at two ends of the activated carbon adsorption assembly that are far away from each other, and the nitrogen inlet pipe and the nitrogen outlet pipe are also respectively at two ends of the activated carbon adsorption assembly that are far away from each other.

[0010] By adopting the above technical solution, it helps to evenly distribute the exhaust gas and nitrogen, improving the exhaust gas treatment effect and the nitrogen stripping efficiency.

[0011] Optionally, the activated carbon adsorption assembly includes activated carbon particles, distance adjusting plates, a bearing net and a driving member; a plurality of the distance adjusting plates are circumferentially distributed along the filter tank, the bearing net is made of a flexible material and is connected to all the distance adjusting plates at the same time, and the bearing net is used for carrying the activated carbon particles; the driving member is installed on the filter tank and cooperates with the distance adjusting plates to drive the distance adjusting plates to be able to move horizontally to a first position and a second position; when the filter tank passes the exhaust gas, the distance adjusting plates move to the first position, and when the filter tank passes nitrogen, the distance adjusting plates move to the second position;

[0012] The first position is characterized in that the distance adjusting plates leave the inner wall of the filter tank and the distance adjusting plates approach each other, and all the distance adjusting plates jointly enclose a first cavity, and the bearing net encloses the activated carbon particles in the first cavity; the second position is characterized in that the distance adjusting plates move away from each other until they abut against the inner wall of the filter tank, and the inner wall of the filter tank and the distance adjusting plates jointly enclose a second cavity, and the bearing net unfolds in the second cavity, and the cross section of the second cavity is larger than the cross section of the first cavity.

[0013] By adopting the above technical solution, when passing the exhaust gas, the distance adjusting plates approach each other, reducing the enclosed space of the activated carbon particles to increase the thickness of the activated carbon particle layer, improving the contact area between the exhaust gas and the activated carbon particles, and enhancing the adsorption effect. When passing nitrogen, the distance adjusting plates move away from each other, expanding the enclosed space, reducing the thickness of the activated carbon particle layer, facilitating the uniform stripping of nitrogen, and improving the desorption efficiency.

[0014] Optionally, the filter tank forms a plurality of protruding parts along its circumferential direction, the protruding parts correspond to the distance adjusting plates one by one, the distance adjusting plates move in the corresponding protruding parts, and the opposite sides of the distance adjusting plates respectively abut against the opposite inner walls of the protruding parts.

[0015] Optionally, the activated carbon filter assembly further includes a gas guiding plate, the gas guiding plate is hinged to the upper and lower ends of the distance adjusting plate, a moving seat is hinged to one end of the gas guiding plate away from the distance adjusting plate, the moving seat moves up and down on the surface of the protruding part opposite to the distance adjusting plate, and the gas guiding plate is used to enclose the space between the distance adjusting plate and the surface of the protruding part opposite to it.

[0016] By adopting the above technical solution, the air guide plate seals the space between the distance adjusting plate and the opposite side of the protruding part, enabling nitrogen to pass through the activated carbon particles more evenly and preventing waste gas from leaking between the distance adjusting plate and the protruding part during the adsorption process.

[0017] Optionally, the activated carbon adsorption assembly further includes a limiting net, which is made of a flexible material and connects all the distance adjusting plates at the same time; when the distance adjusting plate moves to the second position, the limiting net unfolds, and the activated carbon particles are located between the limiting net and the bearing net.

[0018] By adopting the above technical solution, the setting of the limiting net helps to prevent the splashing and scattering of the activated carbon particles during the nitrogen stripping process, improves the stable distribution of the activated carbon particles between the bearing net and the limiting net, and further improves the desorption efficiency and the service life of the activated carbon.

[0019] Optionally, the activated carbon adsorption assembly further includes connecting frames connected between the bearing net and the distance adjusting plates. The connecting frames correspond to the distance adjusting plates one by one, and the connecting frames are hinged to the corresponding distance adjusting plates;

[0020] The bearing net includes a connected middle part and extending parts; the extending parts correspond to the connecting frames one by one and are enclosed by the connecting frames, and the middle part is located between the extending parts; when the distance adjusting plate moves to the first position, the connecting frames drive the extending parts to rotate downward, so that the extending parts and the middle part jointly enclose a loading basket with an upward opening for loading the activated carbon particles.

[0021] By adopting the above technical solution, through the cooperation of the connecting frames, the bearing net and the distance adjusting plates, the flexible loading and unloading of the activated carbon particles in the filter tank are realized.

[0022] Optionally, the waste gas inlet pipe is located above the activated carbon particles.

[0023] By adopting the above technical solution, by arranging the waste gas inlet pipe above the activated carbon particles, waste gas can assist in pushing the connecting frames to rotate downward during the process of the distance adjusting plate moving to the first position.

[0024] Optionally, the inlet direction of the waste gas inlet pipe is opposite to that of the nitrogen inlet pipe.

[0025] In summary, the present application includes at least one of the following beneficial effects:

[0026] 1. By setting at least two filter tanks and equipping them with independent waste gas and nitrogen pipelines and stop valves, the continuous treatment of waste gas is achieved. When nitrogen stripping is carried out in one filter tank, the other filter tank can continue to receive and treat waste gas, avoiding the stagnation of waste gas treatment and significantly improving the efficiency and continuity of waste gas treatment;

[0027] 2. Through the dynamic adjustment of the thickness of activated carbon particles in the filter tank, the activated carbon particle layer can be in a relatively thick state when waste gas passes through the activated tank, and in a relatively thin state when nitrogen passes through the activated tank, so as to improve the adsorption and desorption effects of activated carbon particles. Brief Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of the filter tank in an embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of the internal structure of the filter tank in an embodiment of the present application after hiding the limiting net;

[0031] Figure 4 is a front perspective view of the filter tank in an embodiment of the present application;

[0032] Figure 5 is a schematic structural diagram of the activated carbon adsorption assembly when the distance adjustment plate is in the first position after hiding the limiting net in an embodiment of the present application;

[0033] Figure 6 is a schematic diagram of the explosion structure of the limiting net and the bearing net in an embodiment of the present application;

[0034] Figure 7 is a schematic structural diagram of the activated carbon adsorption assembly when the distance adjustment plate is in the second position in an embodiment of the present application.

[0035] Description of the Reference Numerals: 1. Activated carbon adsorption unit; 101. Filter tank; 2. Nitrogen unit; 201. Nitrogen pipeline; 202. Heater; 3. Condensation unit; 31. Condenser; 32. Liquid storage tank; 4. Air pipe group; 41. Waste gas inlet pipe; 42. Waste gas outlet pipe; 43. Nitrogen inlet pipe; 44. Nitrogen outlet pipe; 5. Stop valve; 6. Distance adjustment plate; 7. Bearing net; 71. Middle part; 72. Extension part; 8. Driving part; 9. First cavity; 10. Second cavity; 11. Protruding part; 12. Air guide plate; 13. Moving seat; 14. Limiting net; 15. Connecting frame; 151. Hinged rod; 152. Extension rod; 16. Bearing basket; 17. Waste gas inlet main pipe; 18. Waste gas outlet main pipe; 19. Nitrogen inlet main pipe; 20. Nitrogen outlet main pipe; 21. Moving groove; 22. Return pipe. Detailed Embodiments

[0036] The following will further elaborate on this application in conjunction with Figures 1 to 7 to provide a more detailed description of this application.

[0037] An embodiment of this application discloses an activated carbon adsorption and condensation recovery device. Referring to Figure 1 , the activated carbon adsorption and condensation recovery device includes an activated carbon adsorption unit 1, a nitrogen unit 2, and a condensation unit 3. The activated carbon adsorption unit 1 is used for allowing waste gas to pass through to adsorb organic substances in the waste gas. The nitrogen unit 2, the activated carbon adsorption unit 1, and the condensation unit 3 are connected in sequence. The nitrogen unit 2 transports nitrogen into the activated carbon adsorption unit 1. The nitrogen desorbs the activated carbon and sends the organic substances in the activated carbon into the condensation unit 3. The condensation unit 3 condenses the organic substances in the nitrogen gas stream into liquid organic solvents.

[0038] Specifically, the nitrogen unit 2 includes a nitrogen pipeline 201 and a heater 202. The nitrogen pipeline 201 enters the heater 202 for heating. The condensation unit 3 includes a condenser 31 and a liquid storage tank 32. The condenser 31 is connected and communicated with the liquid storage tank 32. The nitrogen unit 2 and the condensation unit 3 are both prior arts and will not be elaborated further here.

[0039] The activated carbon adsorption unit 1 includes a filter tank 101. The number of filter tanks 101 is at least two, and the filter tanks 101 are arranged in parallel. Specifically, each activated carbon tank has an activated carbon adsorption component and an air pipe group 4. The activated carbon adsorption component contains activated carbon and is arranged in the inner cavity of the filter tank 101. The air pipe group 4 is connected to the inner cavity of the filter tank 101 for transporting gas.

[0040] The air pipe group 4 includes an exhaust gas inlet pipe 41, an exhaust gas outlet pipe 42, a nitrogen inlet pipe 43, and a nitrogen outlet pipe 44. The exhaust gas inlet pipe 41 is connected and communicated with the top end of the activated carbon tank for transporting organic exhaust gas into the filter tank 101. The exhaust gas outlet pipe 42 is connected and communicated with the bottom end of the filter tank 101 for discharging the exhaust gas filtered by the activated carbon. The nitrogen inlet pipe 43 is connected and communicated with the bottom end of the filter tank 101 for transporting nitrogen into the filter tank 101. The nitrogen outlet pipe 44 is connected and communicated with the top end of the filter tank 101 for discharging the nitrogen passing through the activated carbon.

[0041] It should be noted that stop valves 5 are installed on the exhaust gas inlet pipe 41, the exhaust gas outlet pipe 42, the nitrogen inlet pipe 43, and the nitrogen outlet pipe 44. The exhaust gas inlet pipes 41 on all the filter tanks 101 are connected to the same exhaust gas inlet main pipe 17, the exhaust gas outlet pipes 42 on all the filter tanks 101 are connected to the same exhaust gas outlet main pipe 18, the nitrogen inlet pipes 43 on all the filter tanks 101 are connected to the same nitrogen inlet main pipe 19, and the nitrogen outlet pipes 44 on all the filter tanks 101 are connected to the same nitrogen outlet main pipe 20. The nitrogen inlet main pipe 19 is simultaneously connected to the heater 202, and nitrogen enters the filter tank 101 through the nitrogen pipeline 201, the heater 202, the nitrogen inlet main pipe 19, and the nitrogen inlet pipe 43. The nitrogen outlet main pipe 20 is simultaneously connected to the condenser 31, and the nitrogen passing through the activated carbon enters the condenser 31 through the nitrogen outlet pipe 44 and the nitrogen outlet main pipe 20 for condensation and then enters the liquid storage tank 32 for storage. In addition, exhaust gas inlet main pipe 17, the exhaust gas outlet main pipe 18, the nitrogen inlet main pipe 19, and the nitrogen outlet main pipe 20 are all equipped with induced draft fans (not shown in the figure) to provide power for gas circulation.

[0042] For a single filter tank 101, the exhaust gas inlet pipe 41 and the exhaust gas outlet pipe 42 are opened and closed simultaneously, and the nitrogen inlet pipe 43 and the nitrogen outlet pipe 44 are also opened and closed simultaneously, and only one of the exhaust gas inlet pipe 41 and the nitrogen inlet pipe 43 is in the open state. In this embodiment, the number of filter tanks 101 is two. When the exhaust gas inlet pipe 41 and the exhaust gas outlet pipe 42 of one filter tank 101 are in the open state, the nitrogen inlet pipe 43 and the nitrogen outlet pipe 44 of the other filter tank 101 are in the open state, so that while one filter tank 101 adsorbs the exhaust gas, the other filter tank 101 is purged with nitrogen for organic matter desorption, thereby making the treatment of organic exhaust gas not easily interrupted.

[0043] Refer to Figure 2 , further, the tank body of the filter tank 101 is in the shape of a vertically extending cylinder, and a plurality of protruding parts 11 are evenly spaced along the circumferential direction of the tank body of the filter tank 101. The protruding parts 11 protrude outward and extend vertically, and the cross-section of the protruding part 11 is in a U-shaped structure with the opening facing the center of the filter tank 101. In this embodiment, there are four protruding parts 11, which are sequentially connected along the circumferential direction of the filter tank 101, so that the outer circumferential cross-section and the inner cavity cross-section of the filter tank 101 are both in a "cross" shape.

[0044] Refer to Figure 3 and Figure 4, the activated carbon adsorption assembly includes activated carbon particles (not shown in the figure), a distance adjusting plate 6, a bearing net 7, a driving member 8, a connecting frame 15, and a gas guiding plate 12. The distance adjusting plate 6 is a square plate with its plate surface extending vertically. The number and position of the distance adjusting plates 6 correspond one by one to the protruding portions 11. The distance adjusting plate 6 moves horizontally in the corresponding protruding portion 11, and the opposite side walls of the distance adjusting plate 6 respectively abut against the opposite inner side walls of the protruding portion 11.

[0045] Referring to Figure 4 and Figure 5 , each of the distance adjusting plates 6 corresponds to two gas guiding plates 12. The gas guiding plate 12 is a square plate. The end portions of the two gas guiding plates 12 are respectively hinged to the upper and lower ends of the distance adjusting plate 6 through a hinge shaft. One end of the gas guiding plate 12 away from the distance adjusting plate 6 is hinged with a moving seat 13 through a hinge shaft. The moving seat 13 is a square block, and the moving seat 13 moves up and down on the inner wall of the protruding portion 11 relative to the distance adjusting plate 6. A moving groove 21 for the moving seat 13 to be embedded and move up and down is provided on the inner wall of the protruding portion 11. At the same time, one end of the gas guiding plate 12 away from the distance adjusting plate 6 abuts against the inner end wall of the protruding portion 11, and the opposite side walls of the gas guiding plate 12 respectively abut against the opposite inner side walls of the protruding portion 11.

[0046] Referring to Figure 5 and Figure 6 , the connecting frames 15 correspond one by one to the distance adjusting plates 6 and are connected to the corresponding distance adjusting plates 6. Specifically, the connecting frame 15 has a U-shaped structure and includes a hinged rod 151 extending in a straight line direction and extending rods 152. There are two extending rods 152, and the two extending rods 152 are respectively fixed to the two ends of the hinged rod 151 away from each other. The two extending rods 152 are parallel to each other and are both perpendicular to the hinged rod 151. Combining Figure 3 , the hinged rod 151 is hinged to the surface of the distance adjusting plate 6 facing the vertical center line of the filter tank 101 through a pin shaft, and the two extending rods 152 respectively abut against the opposite inner side walls of the corresponding protruding portion 11 of the distance adjusting plate 6.

[0047] Referring to Figure 6, the carrier network 7 is made of flexible mesh fabric, and the mesh holes of the carrier network 7 are not shown in the figure. The carrier network 7 includes an intermediate portion 71 and extension portions 72 protruding from the intermediate portion 71. The extension portions 72 correspond one-to-one with the protruding portions 11, so that the shape of the carrier network 7 when flattened is adapted to the cross-sectional shape of the inner cavity of the filter tank 101. Therefore, the carrier network 7 in this embodiment is in a "cross" shape adapted to the inner cavity of the filter tank 101 when flattened, and there are four extension portions 72. The extension portions 72 also correspond one-to-one with the connecting frames 15. The extension portions 72 are connected to the U-shaped inner cavities formed by enclosing the corresponding connecting frames 15, and the extension portions 72 are fixed to both the intermediate portion 71 and the extension portions 72 along the extending direction of the U-shaped inner wall of the connecting frames 15. It should be noted that the activated carbon particles are placed on the carrier network 7, and the mesh holes of the carrier network 7 are smaller than the size of the activated carbon particles to prevent the activated carbon particles from leaking downward from the carrier network 7.

[0048] Refer to Figure 3 and Figure 4 , the driving members 8 correspond one-to-one with the distance adjusting plates 6. The driving members 8 are power telescopic members capable of telescoping. In this embodiment, the driving members 8 are electric telescopic rods. In other embodiments, the driving members 8 can also be cylinders, oil cylinders, etc. The cylinder bodies of the driving members 8 are installed on the outer walls of the protruding portions 11 opposite to the plate surfaces of the distance adjusting plates 6. The telescopic ends of the driving members 8 pass through the tank walls of the protruding portions 11 and are connected to the corresponding distance adjusting plates 6, and the telescopic ends of the driving members 8 are perpendicular to the plate surfaces of the distance adjusting plates 6 in the horizontal direction. The telescoping of the telescopic ends of the driving members 8 drives the distance adjusting plates 6 to move in the corresponding protruding portions 11.

[0049] Among them, the telescopic ends of all the driving members 8 telescope synchronously. When the telescopic ends of the driving members 8 extend, the distance adjusting plates 6 move to the first position, and when the telescopic ends of the driving members 8 retract, the distance adjusting plates 6 move to the second position.

[0050] Refer to Figure 4 and Figure 5, when the distance-adjusting plate 6 is in the first position, the distance-adjusting plate 6 moves to one end of the protruding part 11 close to the vertical center line of the active tank body. The distance-adjusting plates 6 approach each other, and the connecting frame 15 rotates downward until the extension rod 152 extends vertically and abuts against the surface of the distance-adjusting plate 6. The extension rods 152 of adjacent connecting frames 15 abut against each other in sequence, so that the extension part 72 of the bearing net 7 folds upward relative to the middle part 71. The middle part 71 and the extension part 72 together form a bearing basket 16. The inner cavity of the bearing basket 16 is a first cavity 9 with an upward opening. At this time, the activated carbon particles are loaded in the bearing basket 16, and the top surface of the activated carbon particles is close to the top of the bearing basket 16. At the same time, the air guide plate 12 above the distance-adjusting plate 6 gradually extends downward obliquely along the direction close to the vertical center line of the filter tank 101, and the air guide plate 12 below the distance-adjusting plate 6 gradually extends upward obliquely along the direction close to the vertical center line of the filter tank 101. The air guide plate 12 closes the space between the distance-adjusting plate 6 and the inner end wall of the protruding part 11 to limit the air flow to the space between the distance-adjusting plate 6 and the inner end wall of the protruding part 11. At this time, organic waste gas is introduced into the filter tank 101, and the waste gas is guided to the bearing basket 16 through the air guide pipe and leaves after being filtered by a relatively thick activated carbon layer.

[0051] Referring to Figure 4 , Figure 5 and Figure 7 , when the distance-adjusting plate 6 is in the second position, the distance-adjusting plate 6 and the air guide plate 12 both move to abut against the inner end wall of the protruding part 11. The distance-adjusting plates 6 move away from each other, and the connecting frame 15 is pulled upward by the bearing net 7 until the extension rod 152 extends horizontally. The bearing basket 16 unfolds so that the bearing net 7 is in a planar "cross" shape. At this time, the inner wall of the filter tank 101 and the distance-adjusting plate 6 together enclose a second cavity 10. The activated carbon particles originally located in the bearing basket 16 fall and are distributed on the extension part 72 as the bearing basket 16 unfolds. Since the cross-section of the second cavity 10 is larger than that of the first cavity 9, the thickness of the activated carbon in the second cavity 10 decreases. At this time, nitrogen is introduced into the filter tank 101, and the nitrogen passes through a relatively thin activated carbon layer to improve the desorption effect of nitrogen on the activated carbon.

[0052] Referring to Figure 6 and Figure 7 , further, the activated carbon adsorption assembly further includes a limiting net 14. The limiting net 14 is made of the same flexible mesh material as the bearing net 7, and the limiting net 14 unfolds into a "cross" shape opposite to the bearing net 7. The limiting net 14 is simultaneously connected to the four distance-adjusting plates 6, and the limiting net 14 is located above the bearing net 7. When the distance-adjusting plate 6 is in the first position, the limiting net 14 is in a folded state.

[0053] When the distance adjustment plate 6 moves from the first position to the second position, it gradually drives the limiting net 14 to unfold, and a second cavity 10 is formed between the limiting net 14 and the bearing net 7. The limiting net 14 intercepts above the activated carbon particles to limit the height of the activated carbon in the second cavity 10, and assists in promoting the uniform distribution of the activated carbon on the extension part 72 and the central part.

[0054] Refer to Figure 4 , it should be noted that the waste gas inlet pipe 41 is located above the activated carbon particles, and the nitrogen inlet pipe 43 is located below the activated carbon particles. When the distance adjustment plate 6 moves from the second position to the first position, the filter tank 101 switches from passing nitrogen to passing waste gas, and the waste gas blows downward to assist the connecting frame 15 to rotate downward. When the distance adjustment plate 6 moves from the first position to the second position, the filter tank 101 switches from passing waste gas to passing nitrogen, and the nitrogen disturbs the activated carbon particles upward to assist the activated carbon particles to fall onto the extension part 72 of the bearing net 7.

[0055] Refer to Figure 1 , furthermore, due to the insufficient thickness of the activated carbon layer through which the waste gas initially enters the filter tank 101, a reflux pipe 22 is connected between the waste gas outlet main pipe 18 and the waste gas inlet main pipe 17. The reflux pipe 22 is equipped with a fan (not shown in the figure) for transporting the air flow from the waste gas outlet main pipe 18 to the waste gas inlet main pipe, and cut-off valves 5 are provided at both ends of the reflux pipe 22 that are far away from each other and on the waste gas outlet main pipe 18.

[0056] When the waste gas initially enters the filter tank 101, the cut-off valve 5 of the reflux pipe 22 is in the open state, and the cut-off valve 5 of the waste gas outlet main pipe 18 is in the closed state. The waste gas returns to the waste gas inlet main pipe 17 through the fan. After the distance adjustment plate 6 reaches the first position, the cut-off valve 5 of the reflux pipe 22 closes and the cut-off valve 5 of the waste gas outlet main pipe 18 opens, and the filtered gas is discharged from the waste gas outlet main pipe 18.

[0057] The implementation principle of an activated carbon adsorption and condensation recovery device according to an embodiment of the present application is as follows: When one of the filter tanks 101 passes waste gas for adsorption, the other filter tank 101 passes nitrogen for desorption. And when the waste gas passes through the filter tank 101, the distance adjustment plate 6 in the filter tank 101 is in the first position, and the waste gas passes through a thicker activated carbon layer to improve the adsorption effect of organic substances in the waste gas; when the nitrogen passes through the filter tank 101, the distance adjustment plate 6 in the filter tank 101 is in the second position, and the nitrogen passes through a thinner activated carbon layer to improve the desorption effect of organic substances in the activated carbon.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An activated carbon adsorption and condensation recovery device, characterized in that, Comprising: An activated carbon adsorption unit (1), a nitrogen unit (2), and a condensation unit (3); the activated carbon adsorption unit (1) includes at least two filter tanks (101), and each filter tank (101) has an activated carbon adsorption assembly and a gas pipe group (4); the gas pipe group (4) includes an exhaust gas inlet pipe (41), an exhaust gas outlet pipe (42), a nitrogen inlet pipe (43), and a nitrogen outlet pipe (44) that are connected to the filter tank (101). Cut-off valves (5) are provided on all the gas pipes in the gas pipe group (4), and the nitrogen inlet pipe (43) is connected to the nitrogen unit (2), and the nitrogen outlet pipe (44) is connected to the condensation unit (3); The activated carbon adsorption assembly includes activated carbon particles, a distance adjustment plate (6), a bearing net (7), and a driving member (8); a plurality of distance adjustment plates (6) are circumferentially distributed along the filter tank (101), the bearing net (7) is made of a flexible material and is connected to all the distance adjustment plates (6) at the same time, and the bearing net (7) is used to hold the activated carbon particles; the driving member (8) is installed on the filter tank (101) and cooperates with the distance adjustment plate (6) to drive the distance adjustment plate (6) to be able to move horizontally between a first position and a second position; when the filter tank (101) passes exhaust gas, the distance adjustment plate (6) moves to the first position, and when the filter tank (101) passes nitrogen, the distance adjustment plate (6) moves to the second position; The first position is characterized in that the distance adjustment plate (6) moves away from the inner wall of the filter tank (101), and the distance adjustment plates (6) approach each other, and all the distance adjustment plates (6) together enclose a first cavity (9), and the bearing net (7) encloses the activated carbon particles in the first cavity (9); the second position is characterized in that the distance adjustment plates (6) move away from each other until they abut against the inner wall of the filter tank (101), and the inner wall of the filter tank (101) and the distance adjustment plate (6) together enclose a second cavity (10), and the bearing net (7) unfolds in the second cavity (10), and the cross-section of the second cavity (10) is larger than the cross-section of the first cavity (9).

2. The activated carbon adsorption and condensation recovery device according to claim 1, wherein: The exhaust gas inlet pipe (41) and the exhaust gas outlet pipe (42) are respectively at two ends of the activated carbon adsorption assembly that are away from each other, and the nitrogen inlet pipe (43) and the nitrogen outlet pipe (44) are also respectively at two ends of the activated carbon adsorption assembly that are away from each other.

3. The activated carbon adsorption and condensation recovery device according to claim 1, wherein: The filter tank (101) forms a plurality of protrusions (11) along its circumference, and the protrusions (11) correspond to the distance adjustment plates (6) one by one. The distance adjustment plates (6) move in the corresponding protrusions (11), and the two opposite sides of the distance adjustment plate (6) respectively abut against the two opposite inner walls of the protrusion (11).

4. The activated carbon adsorption and condensation recovery device according to claim 3, wherein: The activated carbon filtering assembly further includes a gas guiding plate (12). The gas guiding plate (12) is hinged to the upper and lower ends of the distance adjusting plate (6). One end of the gas guiding plate (12) away from the distance adjusting plate (6) is hinged with a moving seat (13). The moving seat (13) moves up and down on the surface of the protruding portion (11) opposite to the distance adjusting plate (6). The gas guiding plate (12) is used to enclose the space between the surface of the distance adjusting plate (6) and the protruding portion (11).

5. The activated carbon adsorption and condensation recovery device according to claim 1, characterized in that: The activated carbon adsorption assembly further includes a limiting net (14). The limiting net (14) is made of a flexible material and is connected to all the distance adjusting plates (6) at the same time. When the distance adjusting plate (6) moves to the second position, the limiting net (14) unfolds, and the activated carbon particles are located between the limiting net (14) and the bearing net (7).

6. The activated carbon adsorption and condensation recovery device according to claim 1, characterized in that: The activated carbon adsorption assembly further includes a connecting frame (15) connected between the bearing net (7) and the distance adjusting plate (6). The connecting frames (15) correspond to the distance adjusting plates (6) one by one, and the connecting frames (15) are hinged to the corresponding distance adjusting plates (6). The bearing net (7) includes a connected middle portion (71) and an extending portion (72). The extending portions (72) correspond to the connecting frames (15) one by one and are surrounded by the connecting frames (15). The middle portion (71) is located between the extending portions (72). When the distance adjusting plate (6) moves to the first position, the connecting frame (15) drives the extending portion (72) to rotate downward, so that the extending portion (72) and the middle portion (71) jointly enclose a bearing basket (16) with an upward opening. The bearing basket (16) is used for loading the activated carbon particles.

7. An activated carbon adsorption and condensation recovery device according to claim 6, characterized in that: The waste gas inlet pipe (41) is located above the activated carbon particles.

8. The activated carbon adsorption and condensation recovery device according to claim 1, wherein: The inlet direction of the waste gas inlet pipe (41) is opposite to that of the nitrogen inlet pipe (43).

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