Active coke wastewater advanced treatment device

Abstract

The present application relates to sewage treatment technical field, specifically to active coke sewage advanced treatment device, aims at solving the problem of low regeneration efficiency and high operation cost in prior art. The device comprises a sewage treatment unit and an active coke recovery and regeneration device. The sewage treatment unit is provided with a main cavity, which is internally configured with a sieve plate, an active coke layer and a micro-sand layer. The first ultrasonic vibrator group is used to prevent the agglomeration of active coke and optimize the water flow distribution. The active coke recovery and regeneration device combines a cyclone separation device with a microwave irradiation regeneration unit. The microwave magnetron and the second ultrasonic vibrator group are used to realize efficient regeneration, significantly improve the recovery rate of iodine adsorption value and reduce the carbon loss rate. The whole device realizes the online recovery and regeneration of active coke under the condition of no shutdown, improves the sewage treatment efficiency and continuous operation capacity, reduces the operation cost, and has important application value and environmental protection significance.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically to an activated carbon wastewater deep treatment device. Background Technology

[0002] The information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Activated coke adsorption technology has been widely used in the field of advanced industrial wastewater treatment due to its advantages such as low cost and large adsorption capacity. However, the low regeneration efficiency of activated coke in existing technologies has long restricted its large-scale application. Traditional thermal regeneration methods require heating the activated coke to above 800℃, with energy consumption as high as 1.5kWh / kg. Moreover, the recovery rate of iodine adsorption value after regeneration is only 60%-75%, and the carbon loss rate exceeds 10%, resulting in insufficient regeneration and recycling efficiency of activated coke and the problem of replacement costs after adsorption saturation.

[0004] In addition, existing systems generally adopt a step-by-step process of "adsorption-offline regeneration", which requires stopping the machine to remove coke during regeneration, resulting in a decrease in processing efficiency of more than 30%. Furthermore, the activated coke is exposed to the open environment during offline transportation, which can easily cause secondary pollution.

[0005] Therefore, there is an urgent need for a synergistic system that deeply integrates adsorption and regeneration functions. Through structural innovation and process optimization, it is possible to achieve efficient regeneration and recycling of activated coke without shutting down the system, thereby fundamentally breaking through the technical bottleneck of low regeneration efficiency. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide an activated carbon wastewater deep treatment device, which aims to solve the problem of high operating costs caused by the difficulty of activated carbon regeneration.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An activated carbon wastewater deep treatment device includes a wastewater treatment unit. The wastewater treatment unit includes a main cavity. An inlet pipe and an outlet pipe connected to a biodegradation treatment device are respectively provided at the bottom and top of the main cavity. A sieve plate is provided near the top of the main cavity. Activated carbon and microsand are installed below the sieve plate. During the rising stage of wastewater, the activated carbon and microsand gradually form a wastewater treatment zone with an activated carbon layer on top and a microsand layer below. The microsand layer is used for pre-filtration and optimizing water flow distribution, the activated carbon layer is used for wastewater adsorption treatment, and the sieve plate is used to intercept large particles or activated carbon particles that escape due to fluidization.

[0009] The sidewall of the wastewater treatment area is also equipped with a first ultrasonic transducer group, which is used to disperse activated coke through cavitation effect and prevent activated coke from agglomerating.

[0010] An activated carbon recovery port is provided below the wastewater treatment area, and a purge port is provided on one side of the activated carbon recovery port. A wastewater buffer outlet located in the wastewater treatment area is also provided above the activated carbon recovery port and the purge port.

[0011] It also includes an activated coke recovery and regeneration device, which includes a cyclone separator and a microwave irradiation regeneration unit. The microwave irradiation regeneration unit includes a microwave cavity, and a conveying device and an irradiation processing main unit are installed inside the microwave cavity.

[0012] The feed end of the cyclone separator is connected to the activated coke recovery port through a recovery pipe, the discharge end of the cyclone separator is connected to the feed port of the microwave cavity, and the discharge port of the microwave cavity is connected to the bottom of the main cavity through a pneumatic return pipe.

[0013] Preferably, the bottom of the main cavity is provided with a micro-sand receiving section, and the activated coke recovery port and the purging port are located at the top of the micro-sand receiving section.

[0014] Preferably, the water inlet pipe is connected to the fluidizing device extending from the micro-sand container. The fluidizing device includes a spiral main tube, on which a plurality of first nozzles are evenly distributed, and all the first nozzles are inclined upwards.

[0015] Preferably, the fluidization device further includes a lower coil installed at the bottom of the microsand container and connected to the water inlet pipe, and a second nozzle is provided on the lower coil.

[0016] Preferably, the irradiation treatment main unit includes a mounting plate, on which microwave magnetron groups and a second ultrasonic transducer group are integrated and mounted at uniform intervals, and the second ultrasonic transducer group is provided with a corresponding protection device.

[0017] Preferably, the conveying device includes a spiral conveying shaft and a drive device for driving its rotation. The spiral conveying shaft is provided with porous spiral blades, and multiple porous baffles are evenly distributed on the porous spiral blades. Each porous baffle is provided with several material equalization holes.

[0018] Preferably, an annular overflow weir is provided at the top of the main cavity, and the water outlet pipe is provided on the annular overflow weir.

[0019] Preferably, the purge port and the pneumatic return pipe are powered by a first pneumatic pipe and a second pneumatic pipe, respectively; the microwave cavity is also provided with an exhaust port, and the exhaust port is provided with an exhaust gas treatment device.

[0020] Preferably, the top of the annular overflow weir is provided with a cover plate, and a pressure valve is installed on the cover plate;

[0021] The inlet pipe, the recovery pipe, the first pneumatic pipe, and the second pneumatic pipe are respectively equipped with a first control valve, a second control valve, a third control valve, and a fourth control valve.

[0022] Preferably, the wastewater buffer outlet is connected to the wastewater buffer tank, and the wastewater buffer tank is connected to the main cavity through a return water pipe. Under the action of the circulation pump, the wastewater buffer is circulated, thereby assisting the activated coke recovery and regeneration device to realize the online recovery and regeneration of activated coke.

[0023] The present invention has at least the following beneficial effects:

[0024] This invention achieves rapid, efficient, and online regeneration of activated coke by introducing a microwave irradiation regeneration unit and an ultrasonic transducer assembly. Compared to traditional thermal regeneration methods, this method not only reduces energy consumption (eliminating the need to heat to above 800°C) but also significantly improves regeneration efficiency (increased iodine adsorption value recovery rate and reduced carbon loss rate). This effectively solves the problem of difficult activated coke regeneration and reduces operating costs.

[0025] In this invention, the application of the first ultrasonic transducer group helps to disperse activated coke through cavitation effect and prevent its agglomeration; at the same time, the use of a micro-sand layer for pre-filtration and optimization of water flow distribution reduces short-circuit flow within the activated coke layer and enhances the wastewater treatment effect.

[0026] In this invention, the design of the inlet pipe and fluidization device enables the water flow to form a composite flow field of swirling flow and vertical jet flow, which enhances lateral mixing, prolongs the contact time between activated carbon and wastewater, and thus improves the pollutant removal efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the spiral heat exchanger tube.

[0029] Figure 3 This is a schematic diagram of the installation structure of the spiral spoiler;

[0030] Figure 4 A schematic diagram of the installation structure for the spiral heat exchange tube and the spiral baffle.

[0031] Figure 5 This is another overall structural schematic diagram of the present invention.

[0032] The attached figures are labeled as follows:

[0033] 100. Main cavity; 110. Microsand container; 111. Water inlet pipe; 112. Fluidization device;

[0034] 1121. Spiral main pipe; 1122. Lower coil; 1123. Second nozzle; 1124. First nozzle; 113. First regulating valve; 120. Overflow weir; 121. Outlet pipe; 122. Pneumatic valve; 130. Screen plate; 140. Activated coke layer; 150. Microsand layer; 160. Recovery pipe; 161. Second regulating valve; 170. First pneumatic pipe; 171. Third regulating valve; 180. Sewage buffer outlet; 181. Sewage buffer tank; 182. Return water pipe; 190. First 200. Ultrasonic transducer assembly; 300. Cyclone separator; 310. Microwave irradiation regeneration unit; 311. Microwave cavity; 312. Mounting plate; 313. Microwave magnetron assembly; 314. Second ultrasonic transducer assembly; 3131. Protective sleeve; 320. Conveying device; 321. Conveying shaft; 322. Spiral blade; 323. Perforated baffle; 3231. Material equalization hole; 330. Tail gas treatment device; 340. Discharge port; 400. Return pipe; 410. Second pneumatic pipe; 411. Fourth control valve. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0036] Figures 1 to 5 An activated carbon wastewater deep treatment device is presented, comprising a wastewater treatment unit. The wastewater treatment unit includes a main cavity 100, with an inlet pipe 111 at the bottom and an outlet pipe 121 connected to a biodegradation treatment device at the top and bottom of the main cavity 100, respectively. A sieve plate 130 is arranged near the top of the main cavity 100, and activated carbon and micro-sand are installed below the sieve plate 130. During the rising stage of wastewater, the activated carbon and micro-sand gradually form a wastewater treatment zone with an activated carbon layer 140 on top and a micro-sand layer 150 below. The micro-sand layer 150 is used for pre-filtration and optimization of water flow distribution, the activated carbon layer 140 is used for adsorption treatment of wastewater, and the sieve plate 130 is used to intercept large particles or activated carbon particles that escape due to fluidization.

[0037] The sidewall of the wastewater treatment area is also equipped with a first ultrasonic transducer group 190, which is used to disperse activated coke through cavitation effect and prevent activated coke from agglomerating.

[0038] An activated carbon recovery port is provided below the wastewater treatment area, and a purge port is provided on one side of the activated carbon recovery port. A wastewater buffer outlet 180 located in the wastewater treatment area is also provided above the activated carbon recovery port and the purge port.

[0039] It also includes an activated coke recovery and regeneration device, which includes a cyclone separator 200 and a microwave irradiation regeneration unit 300. The microwave irradiation regeneration unit 300 includes a microwave cavity 310, and a conveying device 320 and an irradiation processing main unit are installed inside the microwave cavity 310.

[0040] The inlet of the cyclone separator 200 is connected to the activated coke recovery port through a recovery pipe 160, the outlet of the cyclone separator 200 is connected to the inlet of the microwave cavity 310, and the outlet 340 of the microwave cavity 310 is connected to the bottom of the main cavity 100 through a pneumatic return pipe 400.

[0041] To facilitate the purging of activated coke, a micro-sand receiving section 110 is provided at the bottom of the main cavity 100, so that the purging port can be aimed at the settled activated coke layer 140 for purging. The activated coke recovery port and the purging port are located at the top of the micro-sand receiving section 110.

[0042] To improve the fluidization efficiency of activated coke and microsand, a swirling-jet coupling method is used to enhance mass transfer. The specific method is as follows: the inlet pipe 111 is connected to the fluidization device 112 extending out of the microsand receiving part 110. The fluidization device 112 includes a spiral main tube 1121, on which a plurality of first nozzles 1124 are evenly distributed. The first nozzles 1124 are all inclined upwards. The fluidization device 112 also includes a lower coil 1122 installed at the bottom of the microsand receiving part 110 and connected to the inlet pipe 111. The lower coil 1122 is provided with second nozzles 1123. Thus, the influent is diverted through the spiral main tube 1121 and forms a swirling + vertical jet composite flow field through the first nozzle 1124. The spiral tube guides the water flow tangentially, enhancing lateral mixing and preventing dead zones from forming within the activated coke layer 140. The upward-facing second nozzle 1123 provides vertical momentum, driving the particles to fluidize and greatly increasing their expansion rate. This transforms the disordered turbulence of the traditional fluidized bed into a directional swirling flow, extending the contact time between the activated coke and the wastewater.

[0043] The specific structure of the irradiation treatment main unit is as follows: it includes a mounting plate 311, on which a microwave magnetron group 312 and a second ultrasonic transducer group 313 are integrated and mounted at uniform intervals. The microwave magnetron group 312 also includes a microwave waveguide for generating high-frequency electromagnetic waves to penetrate the activated coke particles and achieve heating treatment.

[0044] The second ultrasonic transducer group 313 also includes a piezoelectric ceramic transducer (frequency 28kHz, power 50-100W / L) and an ultrasonic generator, which generate cavitation effect through mechanical vibration to disperse particles and promote pollutant desorption.

[0045] The second ultrasonic transducer is a high-temperature resistant transducer and is equipped with a corresponding protective device, which can be a high-temperature resistant protective sleeve 3131, such as a ceramic protective sleeve 3131. The efficient cooperation between the microwave and ultrasonic devices shortens the activated coke regeneration time and reduces the carbon loss rate. Specifically, the collaborative working process of the second ultrasonic transducer group 313 and the microwave magnetron is as follows:

[0046] Phase 1 (first 2 minutes): Ultrasonic waves operate at full power to disperse activated carbon and pre-desorb pollutants;

[0047] Phase 2 (3-12 min): Microwave main heating + intermittent ultrasonic operation (on / off ratio 1:1) to balance the pyrolysis and mass transfer requirements;

[0048] Phase 3 (last 1 minute): Turn off the microwave and use full power ultrasound to expel the residual gas.

[0049] Frequency isolation: The microwave frequency (2450MHz) and the ultrasonic frequency (28kHz) differ by 6 orders of magnitude, with no spectral overlap, ensuring that the signals do not interfere with each other.

[0050] The specific structure of the conveying device 320 is as follows: it includes a spiral conveying shaft 321 and a driving device for driving its rotation. The spiral conveying shaft 321 is provided with porous spiral blades 322, and multiple porous baffles 323 are evenly distributed on the porous spiral blades 322. Each porous baffle 323 has several material distribution holes 3231. Through the porous baffles 323 and their material distribution holes 3231, the activated coke is evenly dispersed, ensuring a uniform material layer thickness (≤50mm), which is beneficial for improving the uniformity of microwave penetration, thereby avoiding localized overheating or incomplete regeneration.

[0051] The top of the main cavity 100 is provided with an annular overflow weir 120, and the water outlet pipe 121 is provided on the annular overflow weir 120 to further ensure that the clear water is discharged slowly, which is conducive to the deep treatment of the next step of biodegradation treatment. The biodegradation treatment can be carried out using existing technology.

[0052] The purge port and the pneumatic return pipe 400 are powered by the first pneumatic pipe 170 and the second pneumatic pipe 410 respectively, and share a common air source. In order to prevent contamination of activated coke, this application adopts a fully enclosed recycling cycle. Therefore, the source of the conveying should be a protective gas (inert gas). In this example, nitrogen is used.

[0053] The microwave cavity 310 is also provided with an exhaust port, and the exhaust port is provided with an exhaust gas treatment device 330. The exhaust gas treatment device 330 may include a one-way valve and an adsorption unit, and the specific structure can adopt existing technology.

[0054] The top of the annular overflow weir 120 is provided with a cover plate, and a pressure valve 122, which is also a one-way valve, is installed on the cover plate to balance the air pressure in the main body cavity 100.

[0055] The water inlet pipe 111, the recovery pipe 160, the first pneumatic pipe 170 and the second pneumatic pipe 410 are respectively equipped with a first regulating valve 113, a second regulating valve 161, a third regulating valve 171 and a fourth regulating valve 411. The above-mentioned regulating valves can be solenoid valves, which are conducive to automated or intelligent control.

[0056] The wastewater buffer outlet 180 is connected to the wastewater buffer tank 181, and the wastewater buffer tank 181 is connected to the main cavity 100 through the return water pipe 182. Under the action of the circulation pump, the wastewater buffer circulation is realized, thereby assisting the activated coke recovery and regeneration device to realize the online recovery and regeneration of activated coke.

[0057] The following describes the sewage treatment process within the main cavity 100:

[0058] Start-up phase: Micro-sand and activated coke are mixed and loaded into the adsorption tower, and the upward flow velocity of water is adjusted to 0.5 m / s to fully fluidize the particles;

[0059] Stable operation phase: Due to its high density, the micro-sand gradually sinks to the bottom, forming a pre-filtration layer (50-100mm thick), which can act as an "activated filter bed." The water flow distribution is optimized through the gaps between the micro-sand, reducing short-circuit flow in the activated coke layer 140. When the water flow upward velocity is 0.3-0.5m / s (fluidized zone), the activated coke fluidization is maintained.

[0060] Activated coke recovery stage: When the water flow rate decreases, denser particles will settle to the bottom, allowing the activated coke to remain on the upper layer. The specific operation is as follows:

[0061] Step 1, Activated Coke Settling and Preparation: Close the inlet valve to stop wastewater from entering the main chamber 100, and gradually reduce the water flow velocity to below 0.1 m / s. Due to its low density, the activated coke gradually floats to the upper layer as the water flow slows down; the micro-sand quickly settles to the bottom micro-sand container 110. Then, open the air pressure valve 122 on the cover plate to release the internal pressure of the main chamber 100 and prevent negative pressure from interfering with the settling process.

[0062] Step 2, Activated Coke Purging and Recovery: Open the purging port (nitrogen flow rate controlled by the third regulating valve 171, pressure 0.3MPa), and inject nitrogen obliquely upward from the top of the micro-sand container 110, purging the settled activated coke layer 140 to the activated coke recovery port. Driven by nitrogen, the activated coke particles enter the cyclone separator 200 along the recovery pipe 160. The coke-containing gas flow rotates and separates in the cyclone separator; the activated coke (moisture content ≤30%) is discharged from the bottom outlet 340, and the gas (containing trace amounts of dust) enters the tail gas treatment device 330 through the top exhaust port.

[0063] Step 3, Microwave-Ultrasonic Co-regeneration: The wet activated coke after cyclone separation is fed into the microwave cavity 310 via a spiral conveyor 320, and the spreading thickness is controlled to ≤50mm by a porous baffle 323.

[0064] Then, the regeneration stage officially starts. The first stage (0-12min): the second ultrasonic transducer group 313 runs at full power (100W / L), the cavitation effect disperses the activated coke and pre-desorbs more than 30% of the adsorbed organic matter; at this time, the microwave magnetron is on standby, and nitrogen (oxygen content ≤2%) is introduced into the cavity to prevent high-temperature oxidation.

[0065] Second stage (3-12 min): Microwave magnetron group 312 starts up (power 20kW), the cavity temperature rises to 550-600℃, pyrolyzes residual pollutants; the ultrasonic waves switch to intermittent mode (working for 10s / pausing for 10s) to promote the diffusion of pyrolysis gases.

[0066] The third stage (13-15 min): The microwave is turned off, the ultrasonic wave is run at full power, and water vapor (0.5 L / min) is introduced to repair the pores of the activated coke; the high-temperature exhaust gas is treated in a combustion furnace (800℃) to ensure that the VOCs decomposition rate is ≥99%.

[0067] Step 4, Regenerated Coke Reuse and System Restart: The regenerated activated coke is transported to the bottom of the main chamber 100 via the pneumatic return pipe 400 (second pneumatic pipe 410, nitrogen pressure 0.25MPa), and uniformly dispersed by the spiral fluidization device 112. The inlet valve is opened, and the water flow rate is gradually increased to 0.3-0.5 m / s, causing the activated coke to re-fluidize and the adsorption efficiency to return to the initial level (COD removal rate ≥85%).

[0068] During the coke discharge period, the remaining wastewater in the main chamber 100 flows into the wastewater buffer tank 181 through the wastewater buffer outlet 180. The wastewater buffer tank 181 also has reserved wastewater, which can be used for downstream treatment during the coke discharge period to avoid downtime.

[0069] In summary, this device includes a wastewater treatment unit and an activated carbon recovery and regeneration device. The wastewater treatment unit has a main cavity 100, internally configured with a sieve plate 130, an activated carbon layer 140, and a micro-sand layer 150. A first ultrasonic transducer group 190 prevents activated carbon agglomeration and optimizes water flow distribution. The activated carbon recovery and regeneration device combines a cyclone separator 200 with a microwave irradiation regeneration unit 300, utilizing a microwave magnetron and a second ultrasonic transducer group 313 to achieve efficient regeneration, significantly improving the iodine adsorption value recovery rate and reducing carbon loss rate. This invention enables online recovery and regeneration of activated carbon without shutdown, improving wastewater treatment efficiency and continuous operation capability, reducing operating costs, and possessing significant application value and environmental significance.

[0070] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An activated carbon wastewater deep treatment device, comprising a wastewater treatment unit, wherein the wastewater treatment unit includes a main cavity, and an inlet pipe and an outlet pipe communicating with a biodegradation treatment device are respectively provided at the bottom and top of the main cavity, characterized in that: A sieve plate is installed near the top of the main cavity. Activated coke and micro-sand are installed below the sieve plate. During the rising stage of sewage, the activated coke and micro-sand gradually form a sewage treatment zone with an activated coke layer on top and a micro-sand layer below. The micro-sand layer is used for pre-filtration and optimizing water flow distribution, the activated coke layer is used for sewage adsorption treatment, and the sieve plate is used to intercept large particles or activated coke particles that escape due to fluidization. The sidewall of the wastewater treatment area is also equipped with a first ultrasonic transducer group, which is used to disperse activated coke through cavitation effect and prevent activated coke from agglomerating. An activated carbon recovery port is provided below the wastewater treatment area, and a purge port is provided on one side of the activated carbon recovery port. A wastewater buffer outlet located in the wastewater treatment area is also provided above the activated carbon recovery port and the purge port. It also includes an activated coke recovery and regeneration device, which includes a cyclone separator and a microwave irradiation regeneration unit. The microwave irradiation regeneration unit includes a microwave cavity, and a conveying device and an irradiation processing main unit are installed inside the microwave cavity. The feed inlet of the cyclone separator is connected to the activated coke recovery port through a recovery pipe, the discharge end of the cyclone separator is connected to the feed inlet of the microwave cavity, and the discharge outlet of the microwave cavity is connected to the bottom of the main cavity through a pneumatic return pipe. The bottom of the main cavity is provided with a micro-sand receiving section, and the activated coke recovery port and the purge port are located at the top of the micro-sand receiving section; The water inlet pipe is connected to the fluidization device extending out of the micro-sand container. The fluidization device includes a spiral main tube, on which a plurality of first nozzles are evenly distributed. All the first nozzles are inclined upwards. The purge port and the pneumatic return pipe are powered by the first pneumatic pipe and the second pneumatic pipe, respectively; the microwave cavity is also provided with an exhaust port, and the exhaust port is provided with an exhaust gas treatment device.

2. The activated carbon wastewater deep treatment device as described in claim 1, characterized in that: The fluidization device also includes a lower coil installed at the bottom of the microsand container and connected to the water inlet pipe, and a second nozzle is provided on the lower coil.

3. The activated carbon wastewater deep treatment device as described in claim 1, characterized in that: The irradiation treatment main unit includes a mounting plate, on which microwave magnetron groups and a second ultrasonic transducer group are integrated and mounted at uniform intervals. The second ultrasonic transducer group is equipped with a corresponding protection device.

4. The activated carbon wastewater deep treatment device as described in claim 1, characterized in that: The conveying device includes a spiral conveying shaft and a drive device for driving its rotation. The spiral conveying shaft is provided with porous spiral blades, and multiple porous baffles are evenly distributed on the porous spiral blades. Each porous baffle is provided with several material equalization holes.

5. The activated carbon wastewater deep treatment device as described in claim 1, characterized in that: An annular overflow weir is provided at the top of the main cavity, and the water outlet pipe is installed on the annular overflow weir.

6. The activated carbon wastewater deep treatment device as described in claim 5, characterized in that: The top of the annular overflow weir is provided with a cover plate, and a pressure valve is installed on the cover plate; The inlet pipe, the recovery pipe, the first pneumatic pipe, and the second pneumatic pipe are respectively equipped with a first control valve, a second control valve, a third control valve, and a fourth control valve.

7. The activated carbon wastewater deep treatment device according to any one of claims 1 to 6, characterized in that: The wastewater buffer outlet is connected to the wastewater buffer tank, which is connected to the main cavity through a return water pipe. Under the action of the circulation pump, the wastewater buffer is circulated, thereby assisting the activated coke recovery and regeneration device to achieve online recovery and regeneration of activated coke.

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