Coke washing method, device and control system for adsorption type sewage treatment

Abstract

The invention discloses a coke washing method and device for adsorption type sewage treatment and a control system. The coke washing device comprises a coke extraction pipe, a coke-water separation device arranged at the top of the coke extraction pipe and a path selection device, the path selection device is arranged in the coke-water separation device, the bottom of the path selection device is communicated with the top of the coke extraction pipe, the bottom of the coke extraction pipe is provided with a material inlet, the material inlet is located below an active coke glue layer boundary, the coke extraction pipe is connected with a gas supply end provided with a gas valve, and the gas valve is connected with the gas supply end. And the gas valve, the gas supply end and the path selection device are electrically connected with the control center. Through the design of the structure, multiple functions of the coke extractor can be realized, the coke extraction operation can be carried out during production, and the operations of cleaning active coke and separating sewage can also be carried out. Equipment for cleaning the active coke does not need to be independently configured, so that the production cost is reduced.

Description

Technical Field

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

[0002] Adsorption-type sewage treatment usually uses activated coke to adsorb impurities. The coke extractor is installed in the adsorption tank or adsorption tower of the activated coke adsorption process to realize the function of coke removal. During long-term use, the activated coke needs to be cleaned. The usual practice is to use cleaning equipment to extract and clean the activated coke in the adsorption tank (tower), replace it with clean water, and then put it into the adsorption tank (tower). Not only does it require additional cleaning equipment, it will also affect the production progress, thereby increasing production costs. Therefore, how to achieve the functions of coke removal and coke washing at the same time through a single coke extractor is a 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, which will be further described in detail in the Detailed Description of the Invention. The Summary of the 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 scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above-mentioned problems, the present invention provides a coke washing method, device and control system for adsorption-type wastewater treatment, comprising: a coke lifting tube, a coke-water separation device arranged on the top of the coke lifting tube, 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 connected to the top of the coke lifting tube, the bottom of the coke lifting tube is a material inlet, and the material inlet is located below the boundary line of the active coke layer, the coke lifting 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 a control center.

[0005] Preferably, the coke extraction pipe consists of a coke discharge pipe and an air intake pipe sleeved outside the coke discharge pipe, the inner diameter of the air intake pipe is larger than the outer diameter of the coke discharge pipe, the top of the air intake pipe is connected to the outer wall of the coke discharge pipe by a first seal, the bottom of the air intake pipe is connected to the outer wall of the coke discharge pipe by a second seal, a gas flow space is formed between the outer wall of the coke discharge pipe and the inner wall of the air intake pipe, the first seal is provided with a first air hole connected to the gas flow space, the air valve is connected to the gas flow space via the first air hole, and the coke discharge pipe is provided with a plurality of second air holes, the second air holes are located in the gas flow space.

[0006] Preferably, the first seal is annular, the outer wall of the coke discharge tube is connected to the inner wall of the first seal, the top of the air intake pipe is connected to the bottom of the first seal, one end opening of the first air hole is arranged on the side wall of the first seal, and the other end opening is arranged at the bottom of the first seal and is located in the gas circulation space.

[0007] Preferably, the path selection device consists of a drain pipe with a drain port on the side wall, and a conversion valve connected to the tar-water separation device through a connecting piece, the bottom of the drain pipe is connected to the top of the first sealing member and is communicated with the coke discharge pipe, the conversion valve is electrically connected to the control center, and opens or closes the drain port under the control of the control center.

[0008] Preferably, the conversion valve is composed 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 shaft, the movable sealing plate is connected to the driving device shaft, the outer wall of the discharge pipe is provided with a fixing piece, the side wall of the movable sealing plate is connected to the fixing piece shaft, the surface area of ​​the movable sealing plate is larger than the surface area of ​​the discharge port, and the driving device is electrically connected to the control center.

[0009] Preferably, a sleeve extending toward the coke discharge pipe is provided at the bottom of the connecting member, the liquid discharge pipe and the conversion valve are both located in the sleeve, and the liquid discharge port of the liquid discharge pipe is located in the sleeve.

[0010] Preferably, the tar-water separation device consists of a first pipe provided with a backwash discharge outlet, a bottom plate provided at the bottom of the first pipe, and an overflow assembly provided at the top of the bottom plate, the top of the overflow assembly is a first conical member which is larger at the top and smaller at the bottom, the first conical member is located in the first pipe, and a toothed overflow weir is provided at the top, the bottom of the overflow assembly is a second conical member which is smaller at the top and larger at the bottom, the second conical member is located outside the first pipe, the bottom of the first conical member is connected to the second pipe passing through the bottom plate, the bottom of the second pipe is located above the second conical member, 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 discharge outlet of the discharge pipe.

[0011] Preferably, the outer wall of the focus raising tube is provided with a conical focus raising cover.

[0012] A control system for an adsorption type sewage treatment device, comprising:

[0013] A gas supply module, used to control the start and stop of the gas supply end;

[0014] 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;

[0015] The 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] The coke washing method of the device for adsorption sewage treatment comprises the following steps:

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

[0018] S2: The activated coke, water and compressed air are mixed in three phases to clean the activated coke and then discharged from the drain port;

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

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

[0021] When it is necessary to clean the active coke in the adsorption tank (tower), the control center sets the path selection device as the cleaning path. At this time, the path selection device is connected to the coke-water separation device. In the process of the coke-water mixture from the coke lifting tube to the path selection device, the three-phase mixture of gas, water and active coke will impact each other, thereby flushing the active coke. When the coke-water mixture reaches the path selection device, it will enter the coke-water separation device through the path selection device. At this time, under the action of gravity, the active coke will fall back from the coke-water separation device into the adsorption tank (tower), and then the active coke will be recovered, 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-purpose function of the coke lifter can be realized. During production, the coke lifting operation can be performed, and the cleaning of the active coke and the sewage separation operation can also be performed. There is no need to configure equipment for cleaning the active coke separately, thereby reducing production costs.

[0022] The coke washing method, device and control system for adsorption-type wastewater treatment described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying 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 of the present invention. In the accompanying drawings:

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

[0025] Figure 2It is a schematic diagram of the cross-sectional structure of the path selection device and the tar-water separation device.

[0026] Figure 3 for Figure 2 Enlarged view of the middle path selection device.

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

[0028] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the path selection device.

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

[0030] In the figure: 1 coke discharge pipe, 2 air inlet pipe, 3 first sealing member, 4 second sealing member, 5 gas flow space, 6 first air hole, 7 liquid discharge port, 8 liquid discharge pipe, 9 connecting member, 10 driving device, 11 movable sealing plate, 12 fixing member, 13 sleeve, 14 backwash discharge port, 15 first pipe, 16 bottom plate, 17 first cone member, 18 overflow weir, 19 second cone member, 20 second pipe, 21 coke lifting cover. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

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

[0033] like Figure 1-Figure 6As shown, the present invention provides a device for adsorption-type sewage treatment, comprising: a coke raising tube, a tar-water separation device arranged on the top of the coke raising tube, and a path selection device; the path selection device is arranged in the tar-water separation device, and the bottom of the path selection device is connected to the top of the coke raising tube, the bottom of the coke raising tube is a material inlet, and the material inlet is located below the boundary line of the active coke layer, the coke raising tube is connected to a gas supply end provided with a gas valve, 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 realize circuit connection and signal control. When performing routine coking operations, the control center sets the path selection device as the coking path. At this time, the path selection device and the tar-water separation device are disconnected. The control center controls the start and stop of the gas supply end to supply gas. The control center can adjust the gas flow entering the coking tube through the gas valve, thereby controlling the liquid flow in the coking tube. The tar-water mixture will enter the coking tube from the material inlet, and then reach the path selection device through the coking tube. Because it is the coking path at this time, the tar-water mixture can be transported from the top of the path selection device to subsequent equipment.

[0034] When it is necessary to clean the active coke in the adsorption tank (tower), the control center sets the path selection device as the cleaning path. At this time, the path selection device is connected to the coke-water separation device. In the process of the coke-water mixture from the coke lifting tube to the path selection device, the three-phase mixture of gas, water and active coke will impact each other, thereby flushing the active coke. When the coke-water mixture reaches the path selection device, it will enter the coke-water separation device through the path selection device. At this time, under the action of gravity, the active coke will fall back from the coke-water separation device into the adsorption tank (tower), and then the active coke will be recovered, 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-purpose function of the coke lifter can be realized. During production, the coke lifting operation can be performed, and the cleaning of the active coke and the sewage separation operation can also be performed. There is no need to configure equipment for cleaning the active coke separately, thereby reducing production costs.

[0035] Furthermore, 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 two forming a double-tube structure, the inner diameter of the air intake pipe 2 is larger than the outer diameter of 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 through a first sealing member 3, the bottom of the air intake pipe 2 is connected to the outer wall of the coke discharge pipe 1 through a second sealing member 4, 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, the first sealing member 3 is provided with a first air hole 6 connected to the gas flow space 5, the air valve is connected to the gas flow space 5 through the first air hole 6, so that compressed air can be discharged from the first sealing member 3. An air hole 6 enters into the gas circulation space 5. The coke discharge tube 1 is provided with a plurality of second air holes. The second air holes are located in the gas circulation space 5 and are located near the material inlet. After the compressed air enters the gas circulation space 5, it will enter the coke discharge tube 1 from the second air hole. Because the coke lifting tube is inserted below the boundary line of the active coke glue layer as a whole, it is equivalent to being immersed in the liquid as a whole. Therefore, after the compressed gas enters the coke discharge tube 1, it will move upward along the coke discharge tube 1, thereby causing negative pressure in the coke discharge tube 1, and the coke-water mixture is sucked in from the material inlet at the bottom of the coke discharge tube 1, thereby making the coke discharge tube 1 have a coke lifting effect. The first sealing member 3 is annular, the outer wall of the coke discharge tube 1 is connected to the inner wall of the first sealing member 3, the top of the air inlet 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 circulation space 5. Figure 5 As shown. The path selection device is composed of a drain pipe 8 with a drain port 7 on the side wall, and a conversion valve connected to the tar-water separation device through a connector 9. The bottom of the drain pipe 8 is connected to the top of the first sealing member 3 and communicated with the coke discharge pipe 1. The top is the coke discharge port, which is connected to the subsequent processing equipment. The conversion valve is electrically connected to the control center and opens or closes the drain port 7 under the control of the control center. In the process from the coke-water mixture being sucked into the coke discharge pipe 1 to reaching the drain port 7, the three-phase mixture of active coke, water and compressed air impacts each other, thereby cleaning the active coke, which is equivalent to the process of coking, which is itself a process of cleaning the active coke. The difference is that when the coke-raising path is opened, the tar-water mixture is directly supplied to the subsequent processing equipment from the coke discharge port at the top of the drain pipe 8, and after the cleaning path is opened, the tar-water mixture cannot reach the coke discharge port and can only enter the tar-water separation device through the cleaning path for sewage separation. The conversion valve is composed of a drive device 10 arranged at the bottom of the connector 9, and a movable sealing plate 11 arranged at the bottom of the drive device 10, as shown 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 with the connection as the axis during the 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 with the connection as the axis. The outer wall of the discharge pipe 8 is provided with a fixing member 12, and the side wall of the movable sealing plate 11 is axially connected to the fixing member 12. Figure 4 As 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 with the connection with the fixing member 12 as the axis, 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 in the direction of the coke discharge tube 1 is provided at the bottom of the connecting member 9. The drain pipe 8 and the conversion valve are both located in the sleeve 13. The drain port 7 of the drain pipe 8 is located in the sleeve 13. Figure 3 The tar-water separation device is composed of a first pipe 15 provided with a backwash discharge port 14, a bottom plate 16 provided at the bottom of the first pipe 15, and an overflow assembly provided at 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 has a toothed overflow weir 18 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 connected to the through hole 18. The second tube 20 of the bottom plate 16 is connected, and the bottom of the second tube 20 is located above the second cone 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. The height of the liquid level entering the tar-water separation device can be limited to avoid the sleeve 13 being filled with tar-water mixture and affecting the driving device 10. The teeth of the overflow weir 18 can effectively filter out the sewage, and the sewage will enter the first tube 15 and be discharged from the backwash discharge 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 onto the first cone 17. Under the action of gravity, the activated coke will slide downward from the second tube 20 and fall on the outer wall of the second cone 19, thereby spreading to the surroundings through the outer wall of the second cone 19 and falling into the adsorption tank (tower), increasing the fluidity of the liquid in the adsorption tank (tower), thereby preventing the cleaned activated coke from falling vertically into the adsorption tank (tower) and being sucked into the material inlet again for repeated cleaning, resulting in a cleaning dead corner.

[0036] In order to further prevent the cleaned activated coke from being repeatedly sucked into the material inlet, a conical coke collecting cover 21 is provided on the outer wall of the coke collecting tube, so as to further diffuse the cleaned activated coke to the surroundings again, increase the fluidity of the coke-water mixture, avoid the occurrence of cleaning dead corners, and prevent the cleaned activated coke from being repeatedly sucked in.

[0037] The device for adsorption-type sewage treatment is installed in an adsorption tank or an adsorption tower of an activated coke adsorption process, and can realize two functions: coke removal (cleaning path is not open) and coke washing (cleaning path is open).

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

[0039] When the control center controls the drive device 10 to contract through the loop selection module, the movable sealing plate 11 is driven and turned around the connection between it and the fixed part 12, so that the drain port 7 is opened. The control center opens the gas supply end through the gas supply module to supply gas, and controls the gas valve through the gas valve control module to adjust the air intake. The tar-water mixture flows out from the drain port 7, and the activated coke falls back into the adsorption tank (tower) through the first cone 17, the second tube 20, and the second cone 19 under the action of gravity. Since the water flow of the adsorption tank (tower) is in an upward flow state as a whole during the operation of the adsorption tank (tower), the sewage in the tar-water mixture flows out from the overflow weir 18 and is discharged from the adsorption tank (tower) through the backwash drain port 14 (the backwash drain port is connected to the drain pipe). The activated coke, compressed air and water play a flushing role on the activated coke in the process of mixing and rising, and the impurities adsorbed on the surface of the activated coke are discharged 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 gas valve switch through the gas valve control module, and control the air intake through the gas valve, thereby controlling the flow of the coke-water mixture in the coke discharge pipe 1; and control the drive device 10 through the circuit selection module. When the cleaning path (coke washing function) is turned on, the air intake is controlled to make the flow of water entrained in the coke discharge pipe 1 less than the water outlet flow of the entire adsorption tank (tower), thereby preventing sewage from flowing back into the adsorption tank (tower) and affecting the water outlet index. The overflow weir 18 and the first cone 19 can be adjusted up and down, and ensure that the installation height of the overflow weir 18 is slightly lower than the adsorption tank (tower).

[0041] A control system for an adsorption-type sewage treatment device, comprising:

[0042] A gas supply module, used to control the start and stop of the gas supply end;

[0043] 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;

[0044] 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. A coke washing method for adsorption-type sewage treatment, using the device for adsorption-type 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 drain port 7, thereby releasing the seal of the drain port 7;

[0046] S2: The activated coke, water and compressed air are mixed in three phases to clean the activated coke, and then discharged from the drain port 7;

[0047] 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.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, 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, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations 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 tar-water separation device, and the bottom of the path selection device is connected to the top of the coke extraction tube. The bottom of the coke extraction tube is the material inlet, and the material inlet is located below the boundary line of the active coke layer. The coke extraction tube is connected to the 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.

2. The device for adsorption-type sewage treatment according to claim 1, characterized in that: 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 inner diameter of the air intake pipe (2) is larger than the outer diameter of 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); 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); 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) connected to the gas flow space (5) is provided on the first sealing member (3); a gas valve is connected to 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 path selection device is composed of a drainage pipe (8) having a drainage 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 drainage 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 drainage port (7) under the control of the control center.

5. The device for adsorption-type sewage treatment according to claim 4, 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.

6. The device for adsorption-type sewage treatment according to claim 5, 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).

7. The device for adsorption-type sewage treatment according to claim 6, characterized in that: The tar-water separation device comprises a first pipe (15) provided with a backwash discharge port (14), a bottom plate (16) provided at the bottom of the first pipe (15), and an overflow assembly provided at the top of the bottom plate (16); the top of the overflow assembly 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 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) which is smaller at the top and larger at the bottom; the second conical member (19) is located outside the first pipe (15); the bottom of the first conical member (17) is connected to a second pipe (20) which passes 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 inter-tooth gap of the overflow weir (18) is not higher than the discharge port (7) of the discharge pipe (8).

8. 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).

9. A control system for an adsorption-type sewage treatment device according to any one of claims 5 to 7, 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.

10. A coke washing method for an adsorption-type sewage treatment device as claimed in claim 7, 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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