A method, device and control system for coke washing in adsorption sewage treatment

Abstract

The present invention discloses a coke washing method, device and control system for adsorption sewage treatment, including: a coke lifting pipe, a coke-water separation device arranged at the top of the coke lifting pipe, and a path selection device; the path selection device is arranged in the coke-water separation device, and the bottom of the path selection device is communicated with the top of the coke lifting pipe. The bottom of the coke lifting pipe is a material inlet, and the material inlet is located below the dividing line of the activated coke glue layer. The coke lifting pipe is connected to a gas supply end provided with a gas valve, and the gas valve, the gas supply end and the path selection device are all electrically connected to a control center. Through the design of the above structure, the multi-purpose function of the coke lifter can be realized. During production, the coke lifting operation can be carried out, and the cleaning of activated coke and the operation of sewage separation can also be carried out. There is no need to separately configure equipment for cleaning activated coke, thereby reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of coke lifting devices, and more specifically, to a coke washing method, device and control system for adsorption type sewage treatment. Background Art

[0002] In adsorption type sewage treatment, activated coke is usually used to adsorb impurities. The coke lifting device is installed in the adsorption tank or adsorption tower of the activated coke adsorption process, and can realize the function of discharging coke. During long-term use, it is necessary to clean the activated coke. Usually, the method is to extract the activated coke in the adsorption tank (tower) through a cleaning device, clean it, replace the clean water and then put it into the adsorption tank (tower). This not only requires additional cleaning equipment, but also affects the production progress, thereby increasing the production cost. Therefore, how to simultaneously realize the functions of discharging coke and washing coke through a single coke lifting device is the technical problem to be solved by the present invention. Summary of the Invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further detailed in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a coke washing method, device and control system for adsorption type sewage treatment, including: a coke lifting pipe, a coke-water separation device arranged at the top of the coke lifting pipe, and a path selection device; the path selection device is arranged in the coke-water separation device, and the bottom of the path selection device is communicated with the top of the coke lifting pipe. The bottom of the coke lifting pipe is a material inlet, and the material inlet is located below the dividing line of the activated coke layer. The coke lifting pipe is connected to a gas supply end provided with a gas valve, and the gas valve, the gas supply end and the path selection device are all electrically connected to a control center.

[0005] Preferably, the coke lifting pipe is composed of a coke discharging pipe and an air inlet pipe sleeved outside the coke discharging pipe. The inner diameter of the air inlet pipe is larger than the outer diameter of the coke discharging pipe. The top of the air inlet pipe is connected to the outer wall of the coke discharging pipe through a first seal, and the bottom of the air inlet pipe is connected to the outer wall of the coke discharging pipe through a second seal. A gas flow space is formed between the outer wall of the coke discharging pipe and the inner wall of the air inlet pipe. The first seal is provided with a first air hole communicated with the gas flow space, and the gas valve is communicated with the gas flow space through the first air hole. A plurality of second air holes are arranged on the coke discharging pipe, and the second air holes are located in the gas flow space.

[0006] Preferably, the first seal is in a circular ring shape, the outer wall of the coke discharging pipe is connected to the inner wall of the first seal, the top of the air inlet pipe is connected to the bottom of the first seal, one end of the first air hole is open on the side wall of the first seal, and the other end is open at the bottom of the first seal and is located in the gas flow space.

[0007] Preferably, the path selection device consists of a liquid discharging pipe with a liquid discharging port on its side wall and a switching valve connected to the coke-water separation device through a connecting piece. The bottom of the liquid discharging pipe is connected to the top of the first seal and is communicated with the coke discharging pipe. The switching valve is electrically connected to the control center and opens or closes the liquid discharging port under the control of the control center.

[0008] Preferably, the switching valve consists of a driving device arranged at the bottom of the connecting piece and a movable sealing plate arranged at the bottom of the driving device. The top of the driving device is connected to the connecting piece by a shaft, the movable sealing plate is connected to the driving device by a shaft, a fixing piece is arranged on the outer wall of the liquid discharging pipe, the side wall of the movable sealing plate is connected to the fixing piece by a shaft, the surface area of the movable sealing plate is larger than the surface area of the liquid discharging port, and the driving device is electrically connected to the control center.

[0009] Preferably, a sleeve extending towards the coke discharging pipe is arranged at the bottom of the connecting piece. The liquid discharging pipe and the switching valve are both located in the sleeve, and the liquid discharging port of the liquid discharging pipe is located in the sleeve.

[0010] Preferably, the coke-water separation device consists of a first pipe provided with a backwashing sewage discharging port, a bottom plate arranged at the bottom of the first pipe, and an overflow assembly arranged on the top of the bottom plate. The top of the overflow assembly is a first conical part with a larger upper part and a smaller lower part. The first conical part is located in the first pipe and is provided with a toothed overflow weir at the top. The bottom of the overflow assembly is a second conical part with a smaller upper part and a larger lower part. The second conical part is located outside the first pipe. The bottom of the first conical part is communicated with a second pipe penetrating through the bottom plate. The bottom of the second pipe is located above the second conical part. The bottom opening of the sleeve is located below the overflow weir, and the lowest point of the gap between the teeth of the overflow weir is not higher than the liquid discharging port of the liquid discharging pipe.

[0011] Preferably, a conical coke lifting hood is arranged on the outer wall of the coke lifting pipe.

[0012] The control system of the device for adsorption type sewage treatment includes:

[0013] A gas supply module for controlling the start and stop of the gas supply end;

[0014] A gas valve control module for controlling the opening and closing of the gas valve and controlling the intake air volume through the gas valve, thereby controlling the flow rate of the coke-water mixture;

[0015] A circuit selection module is used to control the driving device, thereby controlling the opening and closing of the liquid inlet on the liquid inlet pipe.

[0016] A method for washing coke of a device for adsorption-type sewage treatment, the steps are as follows:

[0017] S1: The control center controls the driving device to drive the movable sealing plate to move, the movable sealing plate leaves the drain port, and the sealing of the drain port is released;

[0018] S2: The activated coke is washed by mixing the activated coke, water, and compressed air, and is discharged from the drain port;

[0019] S3: Under the action of gravity, the activated coke falls from the coke-water separation device back into the adsorption tank, and the sewage flows to the first pipe through the overflow component and is discharged from the backwashing sewage discharge port.

[0020] Compared with the prior art, the present invention at least includes the following beneficial effects:

[0021] When it is necessary to wash the activated coke in the adsorption tank (tower), the path selection device is set to the washing path through the control center. At this time, the path selection device is in a connected state with the coke-water separation device. During the process that the coke-water mixture reaches the path selection device from the coke lifting pipe, the three-phase mixture of gas, water, and activated coke will impact each other, thereby scouring the activated coke. When the coke-water mixture reaches the path selection device, it will enter the coke-water separation device from the path selection device. At this time, under the action of gravity, the activated coke will fall back into the adsorption tank (tower) from the coke-water separation device, thereby recovering the activated coke, and the sewage will be transported to the sewage treatment equipment through the coke-water separation device. Through the design of the above structure, the multi-functional use of the coke lifter can be realized. During production, the coke lifting operation can be carried out, and the operations of washing the activated coke and separating the sewage can also be carried out. There is no need to separately configure equipment for cleaning the activated coke, thereby reducing production costs.

[0022] The method, device, and control system for washing coke for adsorption-type sewage treatment according to the present invention. Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0023] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 It is a cross-sectional view of the device for adsorption-type sewage treatment according to the present invention.

[0025] Figure 2Schematic cross-sectional structure diagram of a path selection device and a coke and water separation device.

[0026] Figure 3 is Figure 2 Enlarged view at the path selection device in

[0027] Figure 4 Schematic structure diagram of the path selection device (the sleeve is not shown).

[0028] Figure 5 Schematic cross-sectional structure diagram of a part of the path selection device.

[0029] Figure 6 Schematic cross-sectional structure diagram of the coke lifting hood.

[0030] In the figure: 1 coke discharging pipe, 2 air inlet pipe, 3 first seal, 4 second seal, 5 gas flow space, 6 first air hole, 7 liquid discharging port, 8 liquid discharging pipe, 9 connecting piece, 10 driving device, 11 movable sealing plate, 12 fixing piece, 13 sleeve, 14 backwashing sewage discharge port, 15 first pipe, 16 bottom plate, 17 first conical part, 18 overflow weir, 19 second conical part, 20 second pipe, 21 coke lifting hood. Specific implementation manners

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0032] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0033] Such as Figures 1-6As shown in the figure, the present invention provides a device for adsorption sewage treatment, including: a coke lifting pipe, a coke-water separation device arranged at the top of the coke lifting pipe, and a path selection device; the path selection device is arranged in the coke-water separation device, and the bottom of the path selection device is communicated with the top of the coke lifting pipe. The bottom of the coke lifting pipe is a material inlet, and the material inlet is located below the dividing line of the activated coke glue layer. The coke lifting pipe is connected to a gas supply end provided with a gas valve, and the gas valve, the gas supply end and the path selection device are all electrically connected to a control center, and the control center is an existing technology or a commercially available product that can achieve circuit connection and signal control. During the conventional coke lifting operation, the control center sets the path selection device to the coke lifting path. At this time, the path selection device is in a disconnected state from the coke-water separation device. The control center controls the start and stop of the gas supply end to supply gas. The control center can adjust the gas flow rate entering the coke lifting pipe through the gas valve, so as to control the liquid flow rate in the coke lifting pipe. The coke-water mixture will enter the coke lifting pipe from the material inlet, and then reach the path selection device through the coke lifting pipe. Because it is the coke lifting path at this time, the coke-water mixture can be transported from the top of the path selection device to the subsequent equipment.

[0034] When it is necessary to clean the activated coke in the adsorption tank (tower), the control center sets the path selection device to the cleaning path. At this time, the path selection device is in a connected state with the coke-water separation device. During the process of the coke-water mixture reaching the path selection device from the coke lifting pipe, the three-phase mixture of gas, water and activated coke will impact each other, thereby scouring the activated coke. When the coke-water mixture reaches the path selection device, it will enter the coke-water separation device from the path selection device. At this time, under the action of gravity, the activated coke will fall back into the adsorption tank (tower) from the coke-water separation device, thereby recovering the activated coke, and the sewage will be transported to the sewage treatment equipment through the coke-water separation device. Through the design of the above structure, the multi-functional use of the coke lifter can be realized. During production, the coke lifting operation can be carried out, and the cleaning of the activated coke and the separation of sewage can also be carried out. There is no need to separately configure equipment for cleaning the activated coke, thereby reducing production costs.

[0035] Furthermore, the coke lifting pipe is composed of a coke discharging pipe 1 and an air inlet pipe 2 sleeved outside the coke discharging pipe 1, and the two form a double-pipe structure. The inner diameter of the air inlet pipe 2 is larger than the outer diameter of the coke discharging pipe 1. The top of the air inlet pipe 2 is connected to the outer wall of the coke discharging pipe 1 through a first seal 3, and the bottom of the air inlet pipe 2 is connected to the outer wall of the coke discharging pipe 1 through a second seal 4. A gas flow space 5 is formed between the outer wall of the coke discharging pipe 1 and the inner wall of the air inlet pipe 2. The first seal 3 is provided with a first air hole 6 communicating with the gas flow space 5, and the air valve communicates with the gas flow space 5 through the first air hole 6, so that compressed air can enter the gas flow space 5 from the first air hole 6. The coke discharging pipe 1 is provided with a plurality of second air holes, which are located in the gas flow space 5 and near the material inlet. After the compressed air enters the gas flow space 5, it will enter the coke discharging pipe 1 from the second air holes. Also, because the entire coke lifting pipe is inserted below the boundary line of the activated coke layer, it is equivalent to being immersed in the liquid as a whole. Therefore, after the compressed gas enters the coke discharging pipe 1, it will move upward along the coke discharging pipe 1, resulting in a negative pressure in the coke discharging pipe 1, sucking the coke-water mixture into the material inlet at the bottom of the coke discharging pipe 1, and thus enabling the coke discharging pipe 1 to have the effect of lifting coke. The first seal 3 is circular, the outer wall of the coke discharging pipe 1 is connected to the inner wall of the first seal 3, the top of the air inlet pipe 2 is connected to the bottom of the first seal 3, one end of the first air hole 6 is open on the side wall of the first seal 3, and the other end is open at the bottom of the first seal 3 and located in the gas flow space 5, as Figure 5 shown. The path selection device is composed of a drain pipe 8 with a drain port 7 provided on its side wall, and a switching valve connected to the coke-water separation device through a connecting member 9. The bottom of the drain pipe 8 is connected to the top of the first seal 3 and communicates with the coke discharging pipe 1. The top is a coke discharging port, which is connected to subsequent processing equipment. The switching valve is electrically connected to the control center and opens or closes the drain port 7 under the control of the control center. During the process of the coke-water mixture being sucked into the coke discharging pipe 1 until it reaches the drain port 7, the three-phase mixture of activated coke, water, and compressed air impacts each other, thereby cleaning the activated coke. It is equivalent to the process of lifting coke itself being a process of cleaning the activated coke. The difference is that when the coke lifting path is opened, the coke-water mixture is directly supplied to the subsequent processing equipment through the coke discharging port at the top of the drain pipe 8, while after the cleaning path is opened, the coke-water mixture cannot reach the coke discharging port and can only enter the coke-water separation device through the cleaning path for sewage separation. The switching valve is composed of a driving device 10 provided at the bottom of the connecting member 9 and a movable sealing plate 11 provided at the bottom of the driving device 10, as Figure 4As shown, the top of the driving device 10 is axially connected to the connecting member 9, so that the driving device 10 can rotate around the connection point during movement. The driving device 10 is usually a telescopic mechanism, such as a pneumatic telescopic arm. Any commercially available product or prior art that can drive the movable sealing plate 11 to move can be used as the driving device 10. The movable sealing plate 11 is axially connected to the driving device 10, so that when the movable sealing plate 11 moves, it can rotate relative to the driving device 10 around the connection point. A fixing member 12 is provided on the outer wall of the drain pipe 8, and the side wall of the movable sealing plate 11 is axially connected to the fixing member 12. As Figure 4 shown, the fixing member 12 is used to limit the position of the movable sealing plate 11. Driven by the driving device 10, the movable sealing plate 11 can rotate around the connection point with the fixing member 12, so as to realize the opening and closing of the drain port. The surface area of the movable sealing plate 11 is larger than the surface area of the drain port 7 to ensure that the movable sealing plate 11 can effectively seal the drain port 7. The driving device 10 is electrically connected to the control center. A sleeve 13 extending towards the coke discharging pipe 1 is provided at the bottom of the connecting member 9. The drain pipe 8 and the switching valve are both located in the sleeve 13, and the drain port 7 of the drain pipe 8 is located in the sleeve 13. As Figure 3 shown. The coke-water separation device is composed of a first pipe 15 provided with a backwashing and sewage draining port 14, a bottom plate 16 provided at the bottom of the first pipe 15, and an overflow assembly provided on the top of the bottom plate 16. The top of the overflow assembly is a first conical member 17 with a large top and a small bottom. The first conical member 17 is located in the first pipe 15, and a toothed overflow weir 18 is provided at the top. The bottom of the overflow assembly is a second conical member 19 with a small top and a large bottom. The second conical member 19 is located outside the first pipe 15. The bottom of the first conical member 17 is communicated with a second pipe 20 passing through the bottom plate 16. The bottom of the second pipe 20 is located above the second conical member 19. The bottom opening of the sleeve 13 is located below the overflow weir 18. The lowest point of the gap between the teeth of the overflow weir 18 is not higher than the drain port 7 of the drain pipe 8, which can limit the height of the liquid level entering the coke-water separation device and avoid filling the sleeve 13 with coke-water mixture and affecting the driving device 10. The teeth of the overflow weir 18 can effectively filter out the sewage. The sewage will enter the first pipe 15 and be discharged from the backwashing and sewage draining port 14. At the same time, the overflow weir 18 can also prevent the activated coke from overflowing. After the coke-water mixture is discharged from the drain port 7, it will fall on the first conical member 17. Under the action of gravity, the activated coke will slide downwards through the second pipe 20 and fall on the outer wall of the second conical member 19, and then diffuse around through the outer wall of the second conical member 19 and fall into the adsorption tank (tower), increasing the fluidity of the liquid in the adsorption tank (tower), and further avoiding that after the washed activated coke vertically falls into the adsorption tank (tower) and is inhaled into the material inlet again for repeated cleaning, resulting in cleaning dead corners.

[0036] In order to further prevent the washed activated coke from being repeatedly sucked into the material inlet, a conical coke lifting hood 21 is provided on the outer wall of the coke lifting pipe, so as to further disperse the washed activated coke around, increase the fluidity of the coke-water mixture, avoid cleaning dead corners, and avoid the washed activated coke from being repeatedly sucked in.

[0037] Installing the device originally used for adsorption sewage treatment in the adsorption tank or adsorption tower of the activated coke adsorption process can realize two functions: coke discharging (the cleaning path is not opened) and coke washing (the cleaning path is opened).

[0038] When the movable sealing plate 11 seals the liquid discharge port 7 under the action of the driving device 10, the path selection device is in the state where the coke lifting path is opened and the cleaning path is closed (coke lifting function). The control center supplies gas by opening the gas supply end through the gas supply module, and controls the gas valve through the gas valve control module to adjust the intake air volume. The air flow enters the gas circulation space 5 through the first air hole 6 of the first sealing member 3, then enters the coke discharging pipe 1 from the gas circulation space 5 through the second air hole, and moves upward along the coke discharging pipe 1. Driven by the compressed air, the coke-water mixture is sucked from the material inlet, and then the three-phase mixture of activated coke, water, and compressed air is discharged from the coke discharging port at the top of the liquid discharge pipe 8.

[0039] When the control center controls the driving device 10 to contract through the loop selection module, the movable sealing plate 11 is driven and flips around its connection with the fixed member 12, so that the liquid discharge port 7 is opened. The control center supplies gas by opening the gas supply end through the gas supply module, and controls the gas valve through the gas valve control module to adjust the intake air volume. The coke-water mixture flows out from the liquid discharge port 7, and the activated coke falls back into the adsorption tank (tower) under the action of gravity through the first conical member 17, the second pipe 20, and the second conical member 19. Since the water flow in the adsorption tank (tower) is in an overall upward flow state during the operation of the adsorption tank (tower), the sewage in the coke-water mixture flows out from the overflow weir 18 and is discharged out of the adsorption tank (tower) through the backwashing sewage outlet 14 (the backwashing sewage outlet is connected to the sewage pipeline). The activated coke, compressed air, and water play a scouring role on the activated coke during the mixing and rising process, discharging the impurities adsorbed on the surface of the activated coke along with the sewage, and then the activated coke falls back into the adsorption tank (tower) to achieve the purpose of coke washing.

[0040] The control center can control the start and stop of the gas supply end through the gas supply module, control the opening and closing of the gas valve through the gas valve control module, and control the intake air volume through the gas valve to control the flow rate of the coke-water mixture in the coke discharge pipe 1. Through the loop selection module, the driving device 10 is controlled. When the cleaning path (coke washing function) is opened, by controlling the intake air volume, the flow rate of the water-entrained in the coke discharge pipe 1 is made less than the water outlet flow rate of the overall adsorption tank (tower), so as to prevent sewage from flowing back into the adsorption tank (tower) and affecting the water outlet index. The overflow weir 18 and the first conical member 19 can be adjusted up and down, and it is ensured that the installation height of the overflow weir 18 is slightly lower than that of the adsorption tank (tower).

[0041] A control system for an apparatus for adsorptive sewage treatment, comprising:

[0042] A gas supply module for controlling the start and stop of the gas supply end;

[0043] A gas valve control module for controlling the opening and closing of the gas valve and controlling the intake air volume through the gas valve to control the flow rate of the coke-water mixture;

[0044] A loop selection module for controlling the driving device 10 to control the opening and closing of the liquid inlet on the liquid inlet pipe. A coke washing method for adsorptive sewage treatment, applying the apparatus for adsorptive sewage treatment, the steps are as follows:

[0045] S1: The control center controls the driving device 10 to drive the movable sealing plate 11 to move, and the movable sealing plate 11 leaves the liquid discharge port 7 to release the seal of the liquid discharge port 7;

[0046] S2: The activated coke is washed by mixing the activated coke, water, and compressed air, and is discharged from the liquid discharge port 7;

[0047] S3: Under the action of gravity, the activated coke falls back into the adsorption tank from the coke-water separation device, and the sewage flows to the first pipe 15 through the overflow assembly and is discharged from the backwashing sewage discharge port 14.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0049] In the present invention, unless otherwise clearly specified or limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A device for adsorption-type sewage treatment, characterized in that: include: A coke raising pipe, a coke-water separation device arranged on the top of the coke raising pipe, and a path selection device; The path selection device is arranged in the coke-water separation device, and the bottom of the path selection device is communicated with the top of the coke extraction tube, the bottom of the coke extraction tube is a material inlet, and the material inlet is located below the boundary line of the active coke layer, the coke extraction tube is connected to a gas supply end provided with a gas valve, and the gas valve, the gas supply end and the path selection device are all electrically connected to the control center; The coke extraction pipe is composed of a coke discharge pipe (1) and an air intake pipe (2) sleeved outside the coke discharge pipe (1); the top of the air intake pipe (2) is connected to the outer wall of the coke discharge pipe (1) via a first sealing member (3); and the bottom of the air intake pipe (2) is connected to the outer wall of the coke discharge pipe (1) via a second sealing member (4). The path selection device is composed of a liquid discharge pipe (8) having a liquid discharge port (7) on its side wall, and a conversion valve connected to the coke-water separation device via a connector (9); the bottom of the liquid discharge pipe (8) is connected to the top of the first sealing member (3) and communicates with the coke discharge pipe (1); the conversion valve is electrically connected to a control center and opens or closes the liquid discharge port (7) under the control of the control center; The tar-water separation device is composed of a first pipe (15) provided with a backwash discharge port (14), a bottom plate (16) arranged at the bottom of the first pipe (15), and an overflow assembly arranged at the top of the bottom plate (16).

2. The device for adsorption-type sewage treatment according to claim 1, characterized in that: The inner diameter of the air intake pipe (2) is larger than the outer diameter of the coke discharge pipe (1); a gas flow space (5) is formed between the outer wall of the coke discharge pipe (1) and the inner wall of the air intake pipe (2); a first air hole (6) communicating with the gas flow space (5) is provided on the first sealing member (3); the air valve is communicated with the gas flow space (5) via the first air hole (6); and a plurality of second air holes are provided on the coke discharge pipe (1); the second air holes are located in the gas flow space (5).

3. The device for adsorption-type sewage treatment according to claim 2, characterized in that: The first sealing member (3) is annular, the outer wall of the coke discharge pipe (1) is connected to the inner wall of the first sealing member (3), the top of the air intake pipe (2) is connected to the bottom of the first sealing member (3), one end opening of the first air hole (6) is arranged on the side wall of the first sealing member (3), and the other end opening is arranged at the bottom of the first sealing member (3) and is located in the gas flow space (5).

4. The device for adsorption-type sewage treatment according to claim 3, characterized in that: The conversion valve is composed of a driving device (10) arranged at the bottom of a connecting member (9), and a movable sealing plate (11) arranged at the bottom of the driving device (10); the top of the driving device (10) is connected to the axis of the connecting member (9); the movable sealing plate (11) is connected to the axis of the driving device (10); the outer wall of the discharge pipe (8) is provided with a fixing member (12); the side wall of the movable sealing plate (11) is connected to the axis of the fixing member (12); the surface area of ​​the movable sealing plate (11) is larger than the surface area of ​​the discharge port (7); and the driving device (10) is electrically connected to a control center.

5. The device for adsorption-type sewage treatment according to claim 4, characterized in that: A sleeve (13) extending in the direction of the coke discharge pipe (1) is provided at the bottom of the connecting piece (9); the liquid discharge pipe (8) and the conversion valve are both located in the sleeve (13); and the liquid discharge port (7) of the liquid discharge pipe (8) is located in the sleeve (13).

6. The device for adsorption-type sewage treatment according to claim 5, characterized in that: The top of the overflow component is a first conical member (17) which is larger at the top and smaller at the bottom. The first conical member (17) is located in the first tube (15) and is provided with a toothed overflow weir (18) at the top. The bottom of the overflow component is a second conical member (19) which is smaller at the top and larger at the bottom. The second conical member (19) is located outside the first tube (15). The bottom of the first conical member (17) is connected to a second tube (20) which passes through the bottom plate (16). The bottom of the second tube (20) is located above the second conical member (19). The bottom opening of the sleeve (13) is located below the overflow weir (18). The lowest point of the gap between the teeth of the overflow weir (18) is not higher than the discharge port (7) of the discharge pipe (8).

7. The device for adsorption-type sewage treatment according to claim 1, characterized in that: The outer wall of the focus raising tube is provided with a conical focus raising cover (21).

8. A control system for an adsorption-type sewage treatment device according to any one of claims 4 to 6, characterized in that: include: A gas supply module, used to control the start and stop of the gas supply end; A gas valve control module, used to control the switch of the gas valve and control the air intake through the gas valve, thereby controlling the flow of the tar-water mixture; The circuit selection module is used to control the driving device (10), thereby controlling the opening and closing of the liquid inlet on the liquid inlet pipe.

9. A coke washing method for an adsorption-type sewage treatment device as claimed in claim 6, characterized in that: Here are the steps: S1: The control center controls the driving device (10) to drive the movable sealing plate (11) to move, and the movable sealing plate (11) leaves the liquid discharge port (7), thereby releasing the seal of the liquid discharge port (7); S2: The activated coke, water and compressed air are mixed in three phases to clean the activated coke and discharged from the drain port (7); S3: Under the action of gravity, the activated coke falls from the coke-water separation device back into the adsorption tank, and the sewage flows from the overflow component to the first pipe (15) and is discharged from the backwash sewage outlet (14).

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