Online regeneration system and method for advanced treatment of wastewater by using electron beam irradiation activated carbon turntable

Abstract

Belonging to the field of sewage treatment, the invention relates to an electron beam irradiation activated carbon turntable advanced treatment wastewater online regeneration system, which comprises an inflow water uniform distribution channel, a guide plate, a water pool, an activated carbon turntable system, an electron accelerator and an effluent weir. The online regeneration system for advanced treatment of wastewater by using the electron beam irradiation activated carbon rotary table is ingenious in design and convenient to apply; the electron beam irradiation chelated activated carbon adsorbs organic pollutants, so that organic matters are favorably gathered on the surface of the activated carbon, and hydroxyl radicals generated by electron beam irradiation are also favorably degraded and gathered organic matters on the surface of the activated carbon, so that online regeneration of the activated carbon disc is realized; the service life of the activated carbon is prolonged, and the sewage and wastewater are further purified.

Description

Technical Field

[0001] The present invention belongs to the field of water treatment technology and relates to the deep treatment of refractory organic pollutants in industrial wastewater, and in particular to an online regeneration system and method for deep treatment of wastewater by an electron beam irradiated activated carbon turntable. The system achieves efficient treatment of refractory organic pollutants and online regeneration of activated carbon by synergistically utilizing activated carbon adsorption and electron beam irradiation degradation technology. Background Art

[0002] In recent years, with the rapid development of industry, especially the rapid development of medicine, coal chemical industry, printing and dyeing industries, more and more new organic pollutants have appeared in industrial wastewater. These new pollutants include not only traditional organic matter, but also some new organic matter with complex structure, strong toxicity and difficult biodegradation, such as polycyclic aromatic hydrocarbons, chlorinated organic matter, drug intermediates, synthetic dyes and their degradation by-products, etc. Once these pollutants enter the water, soil or air, they will not only cause persistent harm to the ecosystem, but also may be enriched through the food chain, and ultimately threaten human health and life safety.

[0003] In the field of sewage treatment, traditional sewage treatment processes mainly include physical methods, chemical methods and biological methods. Physical methods, such as sedimentation, filtration, adsorption, etc., are mainly used to remove suspended matter and some colloidal substances, and have limited removal effects on soluble organic pollutants. Chemical methods, such as coagulation, oxidation, ozone oxidation, etc., can remove some soluble organic pollutants, but the treatment cost is high and may cause secondary pollution. Traditional biological treatment processes such as activated sludge method and biofilm method mainly rely on the degradation of organic pollutants by microorganisms. However, when faced with new toxic and harmful organic matter that is difficult to degrade, it is difficult for the biological activated sludge system to cultivate and survive for a long time. In addition, in the face of emerging new pollutants, its biological survival and adaptability are limited, resulting in the difficulty of the terminal sewage discharge after treatment to meet the standards, and there are still high levels of organic pollutants discharged into the water body. Activated carbon adsorption technology is widely used in the field of water treatment due to its high adsorption efficiency and simple operation. However, there are two prominent problems with traditional activated carbon adsorption technology: first, it is difficult to regenerate and reuse activated carbon online after it adsorbs pollutants in water; second, the activated carbon regeneration process often uses high-temperature roasting, which not only consumes a lot of energy, but also damages the activated carbon structure and significantly reduces the service life of the activated carbon. In addition, frequent replacement or regeneration of activated carbon will also increase operating costs, limiting its application in large-scale industrial wastewater treatment.

[0004] In recent years, electron beam irradiation technology has attracted widespread attention as an efficient water treatment technology. Its principle is to use high-energy electron beams to react with water molecules to produce hydroxyl radicals (·OH), hydrated electrons (e-aq) and other active particles with strong oxidizing properties, which can effectively degrade various toxic and harmful new organic pollutants into harmless substances such as carbon dioxide and water. Compared with traditional treatment technologies, electron beam irradiation technology has the advantages of high efficiency, rapidity, and no secondary pollution, and has great application potential in the treatment of difficult-to-degrade organic wastewater. Despite this, there are also some shortcomings in the actual application of electron beam irradiation technology: first, the cost of electron beam irradiation technology alone is relatively high, especially when treating large-scale low-concentration wastewater, it shows high energy consumption; second, the treatment effect of electron beam irradiation technology on water bodies with low pollutant concentrations is limited, which limits its large-scale promotion and application.

[0005] In summary, with the continuous increase of new organic pollutants in industrial wastewater, it is difficult for existing technologies to simultaneously meet the requirements of efficient removal of pollutants and low-cost continuous operation. Therefore, how to develop efficient, economical and environmentally friendly wastewater deep treatment technology to effectively remove new organic pollutants that are difficult to degrade in wastewater has become a technical problem that needs to be solved urgently in the field of wastewater treatment. Summary of the invention

[0006] 1. Purpose of the invention The technical problem to be solved by the present invention is to address the technical problems such as environmental pollution caused by toxic and harmful new organic pollutants that are difficult to degrade, as well as the problems that existing sewage treatment technologies are difficult to effectively remove these pollutants and activated carbon regeneration is difficult. An electron beam irradiated activated carbon turntable deep treatment wastewater online regeneration system and method are provided. By organically combining activated carbon adsorption technology with electron beam irradiation technology, the activated carbon turntable system is used to achieve pollutant enrichment adsorption and automatic circulation, and the hydroxyl radicals (·OH) and other active particles generated by electron beam irradiation are used to oxidatively degrade the organic pollutants adsorbed on the surface of activated carbon, thereby achieving in-situ online regeneration of activated carbon and deep purification of wastewater. The system is smartly designed, easy to use, and has the characteristics of small footprint; it fully utilizes the strong adsorption and enrichment characteristics of activated carbon, and utilizes the electron beam irradiation to wet the carbon layer surface to generate hydroxyl radicals to degrade organic matter enriched in the carbon layer; the turntable has a slow rotation speed and sufficient irradiation time to achieve continuous and stable operation of online regeneration; at the same time, the irradiation degradation of sewage and wastewater is further strengthened in the thin water layer of the outlet weir, and the purpose of deep purification is finally achieved.

[0007] (II) Technical solution In order to achieve the purpose of the invention and solve the technical problems, the present invention adopts the following technical solutions: The first invention object of the present invention is to provide an electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system, which is used for deep treatment of refractory organic pollutants in industrial wastewater and realizes online regeneration of activated carbon. The system comprises at least a wastewater treatment tank, an activated carbon rotary disk system and an electron accelerator system. Specifically: The wastewater treatment pool is generally in a rectangular structure, which is used to accommodate industrial wastewater and cooperate with various systems to achieve adsorption and degradation of pollutants. Its length direction is consistent with the flow direction of the wastewater. The length dimension is set to meet the requirement that the wastewater reaches a preset hydraulic retention time in the pool. The width dimension is set to ensure that the electron beam can effectively cover the activated carbon layer exposed to the water surface and the thin water layer at the outlet weir. The depth dimension is set to ensure that the carbon layer on the activated carbon turntable is partially exposed to the water surface, so as to simultaneously perform the adsorption and regeneration processes; In the two oppositely arranged long side pool walls of the wastewater treatment pool, one end of the first long side pool wall is provided with a water inlet uniform distribution channel, and one end of the second long side pool wall is provided with a water outlet weir, wherein: the water inlet uniform distribution channel is used to discharge wastewater uniformly into the wastewater treatment pool, the outer side thereof forms a wastewater inlet end, the inner side forms a wastewater discharge end, and the structure of the inner side channel edge is designed to be a guide structure that is partially lowered to guide the flow direction of the wastewater to be consistent with the revolution direction of the activated carbon turntable, so as to optimize the wastewater flow path and increase the hydraulic retention time of the wastewater in the wastewater treatment pool; the water outlet weir is arranged on the second long side pool wall on the opposite side of the water inlet uniform distribution channel, and is used to collect the treated wastewater and discharge it uniformly by overflow, and its height is set to form a thin water layer between the water outlet weir and the water surface of the wastewater treatment pool, and its width and position are set to ensure that the electron beam can cover and effectively penetrate the thin water layer, so as to ensure that the wastewater can be fully irradiated by the electron beam before it is finally discharged; The activated carbon turntable system is arranged in a wastewater treatment tank, and at least comprises an annular revolution conveying device and a plurality of activated carbon turntable assemblies. The annular revolution conveying device is arranged in the wastewater treatment tank, and its layout is adapted to the surrounding side walls of the wastewater treatment tank. The plurality of activated carbon turntable assemblies are arranged on the annular revolution conveying device in a uniformly spaced manner, wherein: each of the activated carbon turntable assemblies comprises at least one activated carbon turntable and a connecting bracket, the activated carbon turntable comprises a solid lightweight cylindrical turntable and an activated carbon layer fixedly coated on the outer peripheral side wall of the cylindrical turntable, and a rotation shaft is arranged at the center of both ends of the cylindrical turntable, the upper end of the connecting bracket is rotatably connected to the rotation shaft, and the lower end is fixedly connected to the annular revolution conveying device; the annular revolution conveying device rotates around the flow direction of the wastewater under the action of the driving device, and each of the activated carbon turntable assemblies revolves around the center of the wastewater treatment tank in a floating manner under the drive of the annular revolution conveying device, and rotates around its rotation shaft under the action of hydraulic force; The electron accelerator system is arranged above the wastewater treatment pool and at least faces the thin water layer area of ​​the outlet weir and the exposed water surface part of the activated carbon turntable system adjacent to the thin water layer area, and is used to irradiate the activated carbon layer and the thin water layer exposed on the water surface through high-energy electron beams to achieve oxidative degradation of pollutants and online regeneration of activated carbon.

[0008] The second invention object of the present invention is to provide an online regeneration method for deep treatment of wastewater by electron beam irradiation activated carbon rotary disk. Based on the above-mentioned online regeneration system for deep treatment of wastewater by electron beam irradiation activated carbon rotary disk of the present invention, the method comprises at least the following steps when implemented: SS1. Wastewater pretreatment and uniform distribution After pretreatment to remove large suspended solids and other impurities that may affect the operation of the system, the industrial wastewater is evenly discharged into the wastewater treatment pool through the water inlet uniform distribution channel, and the wastewater flow direction is guided to be consistent with the revolution direction of the activated carbon turntable. The water level in the wastewater treatment pool is adjusted to a set height by adjusting the water inlet flow rate and flow rate to ensure that the activated carbon turntable is partially exposed above the water surface. After the water level reaches the set height, the driving device of the activated carbon turntable system is started, and the speed of the annular revolution conveyor device is adjusted to 0.5-2 rpm, so that the activated carbon turntable can both revolve and rotate under the action of hydraulic power. At the same time, the electron accelerator system is turned on and preheated, and the electron beam energy is adjusted to 0.5-2.0MeV and the dose rate is adjusted to 1-10kGy / s to meet the energy requirements of wastewater treatment and activated carbon regeneration. SS2. Wastewater Flow Optimization and Adsorption Treatment Under the synergistic effect of the side guide plates and the middle guide plates, the flow state of the wastewater in the treatment tank is adjusted and optimized to prevent the occurrence of dead zones, eddies and short-circuits; under the synergistic effect of revolution and rotation, the carbon layer of the activated carbon turntable is in full contact with the wastewater, and the difficult-to-degrade organic pollutants in the wastewater are removed through physical adsorption; by controlling the flow velocity of the wastewater and the rotation speed of the annular revolution conveyor, the rotation speed of the activated carbon turntable is adjusted to 5-15 rpm to ensure sufficient contact time and adsorption efficiency between the surface of the activated carbon layer and the wastewater, thereby ensuring efficient enrichment of pollutants; SS3. Electron beam synchrotron irradiation treatment The electron accelerator system uses high-energy electron beams to synchronously irradiate the exposed part of the activated carbon turntable above the wastewater treatment pool and the thin water layer at the outlet weir. With the participation of water molecules, strong oxidizing active substances are generated to react with organic pollutants adsorbed by the activated carbon to decompose the pollutants into carbon dioxide, water and other harmless products. At the same time, the energy of the electron beam penetrates the thin water layer to deeply oxidize the residual pollutants in the wastewater that are not adsorbed by the activated carbon. The treated wastewater overflows evenly through the outlet weir and meets the preset emission standards. During the electron beam synchronous irradiation treatment process, the pollutant concentration in the irradiation area is monitored in real time, and the beam intensity and irradiation range of the electron beam are dynamically adjusted to adapt to changes in the concentration of pollutants in the wastewater and ensure energy utilization efficiency. SS4. Online regeneration and recycling of activated carbon During the electron beam irradiation process, the activated carbon adsorbed with pollutants is regenerated online by receiving irradiation. The electron beam destroys the molecular structure of organic pollutants adsorbed on the surface of the activated carbon, releases the adsorption state of the pollutants and restores the adsorption capacity of the activated carbon. The regenerated activated carbon re-enters the adsorption area with the revolution of the activated carbon turntable and continues to adsorb organic pollutants in the wastewater. The dynamic recycling of activated carbon is realized through the continuous operation of the circular revolution conveyor. SS5. Dynamic optimization of system operating parameters By monitoring the water quality parameters in the wastewater treatment pool, including the pollutant concentration, flow rate, temperature and water level of the wastewater, the system operating parameters are dynamically adjusted, including the rotation speed of the circular revolution conveyor, the rotation speed of the activated carbon turntable, the water inlet flow rate, and the beam intensity and irradiation range of the electron beam, and the operating parameters are optimized according to the preset algorithm to ensure the high efficiency and stability of wastewater treatment, while reducing the energy consumption of the system and adapting to different industrial wastewater treatment needs; SS6. System maintenance and sludge discharge During the operation of the system, the deposited sludge and other solid particles are regularly discharged through the sewage outlet at the bottom of the wastewater treatment pool, and are collected at the lowest point of the pool bottom through the inclined pool bottom structure. They are separated from the system operation during the sewage discharge process to avoid interference with the activated carbon turntable and the wastewater flow path. At the same time, the water inlet distribution channel, diversion device and electron accelerator are cleaned regularly to maintain the long-term stable operation of the system.

[0009] (III) Technical Effect Compared with the prior art, the electron beam irradiated activated carbon rotary disc deep treatment wastewater online regeneration system and method of the present invention has the following beneficial and significant technical effects: (1) The present invention achieves efficient removal of refractory organic pollutants in wastewater by combining the adsorption characteristics of activated carbon with the efficient oxidation and degradation ability of electron beams. The adsorption of activated carbon causes the organic pollutants in the wastewater to accumulate on the surface of the carbon layer, while electron beam irradiation generates hydroxyl radicals (·OH) and hydrated electrons (e - The highly active particles such as activated carbon (aq) decompose the pollutants, which not only gives full play to the strong adsorption and enrichment characteristics of activated carbon, but also utilizes the electron beam irradiation to wet the surface of the carbon layer to produce hydroxyl free radicals to degrade the organic matter enriched in the carbon layer, which significantly enhances the treatment efficiency of the system.

[0010] (2) The present invention realizes the dynamic recycling and online regeneration of activated carbon by providing a circular revolution conveyor and an activated carbon turntable assembly. The activated carbon adsorbed with pollutants can be regenerated without being removed from the system. The electron beam destroys the molecular structure of organic pollutants through irradiation, causing the pollutants to desorb from the surface of the activated carbon and decompose into harmless products, thereby restoring the adsorption capacity of the activated carbon. This design significantly extends the service life of the activated carbon, avoids the waste of resources and secondary pollution problems in the traditional activated carbon replacement process, and reduces operating costs.

[0011] (3) The present invention optimizes the flow path and hydraulic conditions of the wastewater, and utilizes the synergistic effect of the water inlet uniform distribution channel, the side guide plate and the middle guide plate to effectively avoid the short-flow phenomenon and the formation of dead zones in the wastewater treatment tank, so that the wastewater can flow evenly through the adsorption area of ​​the activated carbon turntable assembly and fully contact the surface of the carbon layer, thereby improving the removal efficiency of pollutants. At the same time, the wastewater forms a uniform thin water layer at the outlet weir, and the electron beam can fully penetrate and irradiate the thin water layer, thereby achieving the final purification of the wastewater. In addition, the present invention optimizes the length, width and depth of the wastewater treatment tank so that it can meet the hydraulic retention time requirements of the wastewater and ensure that the activated carbon turntable is partially exposed to the water surface, thereby achieving the synergistic treatment of adsorption and regeneration. At the same time, the inclined bottom structure of the pool combined with the bottom sewage outlet effectively reduces the interference of sediments on the operation of the system, and improves the operation stability and maintenance convenience of the system.

[0012] (4) The present invention has a compact structure, is easy to use, and occupies a small area. It not only gives full play to the strong adsorption and enrichment characteristics of activated carbon, but also utilizes electron beam irradiation to wet the surface of the carbon layer to produce hydroxyl radicals to degrade organic matter enriched in the carbon layer; the turntable rotates slowly, and there is sufficient irradiation time to achieve online regeneration and continuous stable operation; at the same time, the thin water layer at the outlet weir further strengthens the irradiation to degrade the wastewater, and finally achieves the purpose of deep purification. In addition, the electron beam irradiation used in the present invention will not produce secondary pollution, and the online regeneration of activated carbon also reduces the generation of waste activated carbon, further reducing the risk of environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A top view of an online regeneration system for deep wastewater treatment using an electron beam irradiated activated carbon rotary disk provided in an embodiment of the present invention.

[0014] Figure 2 A front view of an online regeneration system for deep wastewater treatment using an electron beam irradiated activated carbon rotary disk provided in an embodiment of the present invention.

[0015] Figure 3 A cross-sectional view of an online regeneration system for deep wastewater treatment using an electron beam irradiated activated carbon rotary disk provided in an embodiment of the present invention.

[0016] Figure 4 A flow chart of an online regeneration method for deep treatment of wastewater by an electron beam irradiated activated carbon rotary disk provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1-water inlet uniform distribution channel, 2-guide plate, 3-wastewater treatment tank, 4-activated carbon turntable system, 4-1 solid lightweight cylindrical turntable, 4-2 activated carbon layer, 4-3 rotation axis, 4-4 connecting bracket, 4-5 circular revolution transmission device, 5-electron accelerator, 6-water outlet weir. DETAILED DESCRIPTION

[0018] The structure and operation flow of the electron beam irradiated activated carbon rotary disc deep treatment wastewater online regeneration system and method of the present invention are further explained below through specific implementation methods. The present invention realizes the efficient removal of difficult-to-degrade organic pollutants in industrial wastewater through the synergistic effect of adsorption of the activated carbon rotary disc and electron beam irradiation regeneration. At the same time, the service life of the activated carbon is extended through online regeneration technology, which significantly improves the operating efficiency and economy of the system. The following examples describe in detail the structural design, working principle and specific operating steps of the system and method of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the specific contents described in the following examples.

[0019] Example 1 As a specific example, Figures 1 to 3 As shown, the electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system of the present invention is used for deep treatment of difficult-to-degrade organic pollutants in industrial wastewater and realizes online regeneration of activated carbon, including core components such as water inlet distribution channel 1, diversion device 2, wastewater treatment tank 3, activated carbon rotary disk system 4, electron accelerator 5, and water outlet weir 6.

[0020] In the electron beam irradiated activated carbon turntable deep treatment wastewater online regeneration system of the present invention, the wastewater treatment pool 3 is generally a rectangular structure, which is used to accommodate industrial wastewater and cooperate with various systems to achieve adsorption and degradation of pollutants. Its length direction is consistent with the flow direction of the wastewater, and the length dimension is set to meet the requirement that the wastewater reaches a preset hydraulic retention time in the pool. The width dimension is set to ensure that the electron beam can effectively cover the activated carbon layer exposed to the water surface and the thin water layer at the outlet weir 6, and the depth dimension is set to ensure that the carbon layer on the activated carbon turntable assembly is partially exposed to the water surface, so as to carry out the adsorption and regeneration processes simultaneously.

[0021] In the two oppositely arranged long side pool walls of the wastewater treatment pool 3, one end of the first long side pool wall is provided with an inlet uniform distribution channel 1, and one end of the second long side pool wall is provided with an outlet weir 6, wherein: the inlet uniform distribution channel 1 is used to discharge wastewater evenly into the wastewater treatment pool 3, its outer side forms a wastewater inlet end, and its inner side forms a wastewater discharge end, and the structure of its inner channel edge is designed to be a diversion structure that is partially lowered to guide the flow direction of the wastewater to be consistent with the revolution direction of the activated carbon turntable, so as to optimize the wastewater flow path and increase the hydraulic retention time of the wastewater in the wastewater treatment pool; the outlet weir 6 is arranged on the second long side pool wall on the opposite side of the inlet uniform distribution channel 1, and is used to collect the treated wastewater and evenly overflow and discharge it, and its height is set to form a thin water layer between the outlet weir 6 and the water surface of the wastewater treatment pool 3, and its width and position are set to ensure that the electron beam can cover and effectively penetrate the thin water layer, so as to ensure that the wastewater can be fully irradiated by the electron beam before being discharged.

[0022] Preferably, a guide device 2 is provided along the wastewater treatment tank 3, comprising at least side guide plates arranged at the corners of the side walls around the tank body and an intermediate guide plate arranged in the middle of the tank body, wherein: the outer wall surface of each side guide plate is fixedly arranged on the side walls around the tank body, the inner wall surface is an arc surface, and its vertical height is not lower than the water level, which is used to eliminate dead zones of water flow, prevent wastewater from short-flowing to the outlet weir 6 and ensure sufficient contact between wastewater and activated carbon; the intermediate guide plate is fixedly arranged at the center of the bottom of the wastewater treatment tank 3, and its plate surface extends along the length direction of the tank body, and the space between the intermediate guide plate and the side walls around the tank body and the side guide plates forms a revolution channel for the activated carbon turntable system 4 in the wastewater treatment tank, and the annular revolution conveying device is laid on the bottom of the revolution channel.

[0023] In addition, the water inlet uniform distribution channel 1 is set at one end of the first long side pool wall of the wastewater treatment pool 3. In order to further increase the hydraulic retention time, its water inlet end is connected to the wastewater source system and is provided with a flow regulating device to control the flow rate and flow into the wastewater treatment pool, ensuring that the wastewater flow rate matches the hydraulic retention time designed for the pool body. Its inner channel edge is a semi-closed structure, in which the part facing the incoming wastewater flow is in a closed state, and the part in line with the incoming wastewater flow lowers the channel edge and is in an open state, and lowers the channel edge so that the outflow distribution direction is consistent with the revolution direction of the activated carbon system. It is preferred that a water distribution trough and a water distribution plate are provided in the opening part, the water distribution trough is used to disperse the flow energy of the wastewater, and the water distribution plate is provided with uniformly distributed holes or slit structures to ensure that the wastewater is evenly distributed when it flows into the wastewater treatment pool 3, avoiding the phenomenon of excessively high or low flow rates in local areas.

[0024] At the same time, a coarse particle interception device is preferably provided on the outside of the water inlet uniform distribution channel 1, which is used to intercept larger suspended matter and particulate matter in the wastewater before the wastewater enters the wastewater treatment tank 3. The coarse particle interception device includes at least one layer of metal mesh and a flushing system. The metal mesh is used to filter particulate matter. The flushing system regularly cleans the surface of the metal mesh to ensure that it remains unobstructed during long-term operation, thereby avoiding suspended matter blocking the water inlet uniform distribution channel and affecting the uniformity of wastewater flow.

[0025] In some other preferred embodiments, the bottom of the wastewater treatment tank 3 also includes a bottom structure with an inclined design, and a sewage outlet is provided at the lowest point of the bottom for regularly discharging sludge and other solid particles deposited on the bottom of the tank. The inclined bottom structure avoids the accumulation of solid impurities by optimizing the wastewater flow path, and in conjunction with the sewage outlet, reduces the interference of sediments on the operation of the activated carbon turntable system, thereby further improving the self-cleaning ability of the wastewater treatment tank and the stability of the system operation.

[0026] In the online regeneration system for deep treatment of wastewater by electron beam irradiation activated carbon turntable of the present invention, the activated carbon turntable system 4 is arranged in the wastewater treatment tank, and at least includes a circular revolution conveyor 4-5 and a plurality of activated carbon turntable assemblies, the circular revolution conveyor 4-5 is arranged in the wastewater treatment tank 3, and its layout is adapted to the surrounding side walls of the wastewater treatment tank 3, and a plurality of activated carbon turntable assemblies are arranged on the circular revolution conveyor 4-5 in a uniformly spaced manner, wherein: each activated carbon turntable assembly includes at least one activated carbon turntable and a connecting bracket 4-4, and the activated carbon turntable includes a solid A lightweight cylindrical turntable 4-1 and an activated carbon layer 4-2 fixedly coated on the outer peripheral side wall of the cylindrical turntable 4-1, and a rotation shaft 4-3 is provided at the center of both ends of the cylindrical turntable 4-1, the upper end of the connecting bracket 4-4 is rotatably connected to the rotation shaft 4-3, and the lower end is fixedly connected to the annular revolution conveyor 4-5; the annular revolution conveyor 4-5 rotates around the flow direction of the wastewater under the action of the driving device, and each activated carbon turntable assembly revolves around the wastewater treatment tank in a floating manner driven by the annular revolution conveyor 4-5, and rotates around its rotation shaft under the action of hydraulic pressure.

[0027] Preferably, the annular revolution conveyor 4-5 includes a drive motor and a transmission mechanism, wherein the drive motor is a servo motor, and the transmission mechanism includes a reducer and a gear transmission system, which are used to transmit the power of the drive motor to the annular revolution conveyor 4-5, so as to achieve precise control and stable operation of the activated carbon turntable. In addition, preferably, bearings and bearing seats are provided at both ends of the self-rotation shaft of the activated carbon turntable, and the connecting bracket 4-4 includes an upper support arm, a lower fixed seat and an intermediate connecting rod, wherein the upper support arm is connected to the self-rotation shaft 4-3 of the activated carbon turntable through a bearing, the lower fixed seat is fixedly connected to the annular revolution conveyor 4-5, and the intermediate connecting rod is arranged between the upper support arm and the lower fixed seat. Under the drive of the annular revolution conveyor 4-5 and the flow of wastewater, the activated carbon turntable realizes self-rotation through the self-rotation shaft and the bearing seat, and the self-rotation speed is jointly determined by the wastewater flow rate and the system drive parameters.

[0028] The inner layer of the activated carbon turntable adopts a solid lightweight turntable. The light weight is to reduce the overall operating load, and the solidity is for the driving and stirring system, so that the wastewater is located outside the wastewater pool to facilitate the outer carbon layer to adsorb organic pollutants; the axial spacing of the activated carbon turntable is as small as possible to increase the adsorption surface of the carbon layer, but the spacing must accommodate the connection width of the bracket; the radial distance between the activated carbon turntable and the outlet weir is as small as possible to ensure that the beam irradiation range of the electron beam can cover the carbon layer surface exposed to the water surface and the thin water flow on the outlet weir; the carbon layer is not easy to be thick, in order to ensure the adsorption effect, and it should also be irradiated by the electron beam as much as possible to degrade the adsorbed and enriched organic matter, so as to achieve the purpose of online carbon layer regeneration and continuous operation.

[0029] In the electron beam irradiated activated carbon turntable deep treatment wastewater online regeneration system of the present invention, the electron accelerator 5 is arranged above the wastewater treatment pool 3 and at least faces the thin water layer area of ​​the outlet weir 6 and the exposed water surface part of the activated carbon turntable system 4 adjacent to the thin water layer area, and is used to irradiate the activated carbon layer and the thin water layer exposed on the water surface by high-energy electron beams to achieve oxidative degradation of pollutants and online regeneration of activated carbon.

[0030] Preferably, the electron accelerator 5 also includes an electron beam current adjustment device for dynamically adjusting the electron beam current intensity and irradiation range according to changes in the pollutant concentration in the wastewater treatment pool; the beam current adjustment device includes a control module and a sensor module, the sensor module monitors the pollutant concentration and flow rate of the wastewater in real time, and transmits data to the control module, and the control module adjusts the beam current intensity and irradiation range according to a preset algorithm, thereby reducing energy consumption while ensuring the irradiation effect.

[0031] When the electron beam irradiated activated carbon rotary disc deep treatment wastewater online regeneration system of the present invention is working, the wastewater enters the wastewater treatment pool 3 from the water distribution channel 1, and after being diverted by the diversion device 2, the activated carbon rotary disc system 4 is fully in contact with the wastewater to adsorb and enrich the organic pollutants in the wastewater. The activated carbon rotary disc system 4 revolves so that the activated carbon layer 4-2 regenerated by electron beam irradiation continues to operate online, and the self-rotation is so that the activated carbon fully contacts the wastewater, and the regenerated carbon layer can be immersed in the pool again to exert its adsorption and enrichment characteristics. Thus, the online regeneration of activated carbon is realized, and the continuous and stable operation is realized, and the hydroxyl free radicals generated by electron beam irradiation are used to degrade toxic and harmful new organic pollutants that are difficult to degrade, and the wastewater is deeply purified and treated, thereby solving the problems in this field.

[0032] Example 2 The structural design and core component configuration of the electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system of the present invention are described in detail in Example 1. Based on this, this Example 2 further introduces the specific method steps of wastewater treatment and activated carbon regeneration based on the system, such as Figure 4 As shown: SS1. Wastewater pretreatment and uniform distribution After pretreatment to remove large suspended solids and other impurities that may affect the operation of the system, the industrial wastewater is evenly discharged into the wastewater treatment pool through the water inlet uniform distribution channel and the wastewater flow direction is guided to be consistent with the revolution direction of the activated carbon turntable. The water level in the wastewater treatment pool is adjusted to a set height by adjusting the water inlet flow rate and flow rate to ensure that the activated carbon turntable is partially exposed above the water surface. After the water level reaches the set height, the driving device of the activated carbon turntable system is started, and the speed of the annular revolution conveyor is adjusted to 0.5-2 rpm, so that the activated carbon turntable can both revolve and rotate under the action of hydraulic power. At the same time, the electron accelerator system is turned on and preheated, and the electron beam energy is adjusted to 0.5-2.0MeV and the dose rate is adjusted to 1-10kGy / s to meet the energy requirements of wastewater treatment and activated carbon regeneration.

[0033] SS2. Wastewater Flow Optimization and Adsorption Treatment With the coordinated action of the side guide plates and the middle guide plates, the flow state of the wastewater in the treatment pool is adjusted and optimized to prevent the occurrence of dead zones, eddies and short-circuits. With the coordinated action of revolution and rotation, the carbon layer of the activated carbon turntable is in full contact with the wastewater, and the difficult-to-degrade organic pollutants in the wastewater are removed by physical adsorption. By controlling the flow velocity of the wastewater and the rotation speed of the annular revolution conveyor, the rotation speed of the activated carbon turntable is adjusted to 5-15 revolutions per minute to ensure sufficient contact time and adsorption efficiency between the surface of the activated carbon layer and the wastewater, thereby ensuring efficient enrichment of pollutants.

[0034] SS3. Electron beam synchrotron irradiation treatment The electron accelerator system uses high-energy electron beams to synchronously irradiate the exposed part of the activated carbon turntable above the wastewater treatment pool and the thin water layer at the outlet weir. With the participation of water molecules, strong oxidizing active substances are generated to react with organic pollutants adsorbed by the activated carbon to decompose the pollutants into carbon dioxide, water and other harmless products. At the same time, the energy of the electron beam penetrates the thin water layer and deeply oxidizes the residual pollutants in the wastewater that are not adsorbed by the activated carbon. The treated wastewater overflows evenly through the outlet weir and meets the preset emission standards. During the electron beam synchronous irradiation treatment, the pollutant concentration in the irradiated area is monitored in real time, and the beam intensity and irradiation range of the electron beam are dynamically adjusted to adapt to changes in the concentration of pollutants in the wastewater and ensure energy utilization efficiency.

[0035] SS4. Online regeneration and recycling of activated carbon During the electron beam irradiation process, the activated carbon that has adsorbed pollutants is regenerated online by being irradiated. The electron beam destroys the molecular structure of organic pollutants adsorbed on the surface of the activated carbon, releases the adsorption state of the pollutants and restores the adsorption capacity of the activated carbon. The regenerated activated carbon re-enters the adsorption area with the revolution of the activated carbon turntable and continues to adsorb organic pollutants in the wastewater. The dynamic recycling of activated carbon is achieved through the continuous operation of the circular revolution conveyor.

[0036] SS5. Dynamic optimization of system operating parameters By monitoring the water quality parameters in the wastewater treatment pool, including the pollutant concentration, flow rate, temperature and water level of the wastewater, the system operating parameters are dynamically adjusted. The parameter adjustments include the rotation speed of the circular orbiting conveyor, the rotation speed of the activated carbon turntable, the water inlet flow rate, and the beam intensity and irradiation range of the electron beam. The operating parameters are optimized according to the preset algorithm to ensure the high efficiency and stability of wastewater treatment, while reducing the energy consumption of the system and adapting to different industrial wastewater treatment needs.

[0037] SS6. System maintenance and sludge discharge During the operation of the system, the deposited sludge and other solid particles are regularly discharged through the sewage outlet at the bottom of the wastewater treatment pool, and are collected at the lowest point of the pool bottom through the inclined pool bottom structure. They are separated from the system operation during the sewage discharge process to avoid interference with the activated carbon turntable and the wastewater flow path. At the same time, the water inlet distribution channel, diversion device and electron accelerator are cleaned regularly to maintain the long-term stable operation of the system.

[0038] Through the description of the above specific embodiments, it can be seen that the electron beam irradiated activated carbon turntable deep treatment wastewater online regeneration system and method of the present invention has been innovated in structural design and operation process, and can efficiently remove difficult-to-degrade organic pollutants in industrial wastewater, and extend the service life of the system through online regeneration of activated carbon. The present invention not only improves the wastewater treatment efficiency, but also significantly reduces the operating cost and environmental impact, and has broad application prospects and practical value. The above embodiments are only further elaborations of the present invention and do not constitute any limitation to the scope of protection of the present invention. Those skilled in the art may make various forms of changes and improvements without departing from the essence of the present invention, all of which should fall within the scope of protection of the present invention.

Claims

1. An electron beam irradiated activated carbon rotary disc deep treatment wastewater online regeneration system, comprising at least a wastewater treatment tank, an activated carbon rotary disc system and an electron accelerator system, characterized in that: The wastewater treatment pool is generally in a rectangular parallelepiped structure, and its length direction is consistent with the flow direction of the wastewater. The length dimension is set to meet the requirement that the wastewater reaches a preset hydraulic retention time in the pool, the width dimension is set to ensure that the electron beam can effectively cover the activated carbon layer exposed to the water surface and the thin water layer at the outlet weir, and the depth dimension is set to ensure that the carbon layer on the activated carbon turntable is partially exposed to the water surface; One end of the first long side pool wall of the wastewater treatment pool is provided with an inlet uniform distribution channel, and one end of the second long side pool wall is provided with an outlet weir, wherein: the outer side of the inlet uniform distribution channel forms a wastewater inlet end, the inner side forms a wastewater discharge end, and the structure of the inner channel edge is designed to be a guide structure that is partially lowered to guide the wastewater flow direction to be consistent with the revolution direction of the activated carbon turntable; the outlet weir is arranged on the second long side pool wall on the opposite side of the inlet uniform distribution channel, and is used to collect the treated wastewater and evenly overflow and discharge it, and its height is set to form a thin water layer between the outlet weir and the water surface of the wastewater treatment pool, and its width and position are set to ensure that the electron beam can cover and effectively penetrate the thin water layer; The activated carbon turntable system is arranged in a wastewater treatment tank, and at least comprises an annular revolution conveying device and a plurality of activated carbon turntable assemblies. The annular revolution conveying device is arranged in the wastewater treatment tank, and its layout is adapted to the surrounding side walls of the wastewater treatment tank. The plurality of activated carbon turntable assemblies are arranged on the annular revolution conveying device in a uniformly spaced manner, wherein: each of the activated carbon turntable assemblies comprises at least one activated carbon turntable and a connecting bracket, the activated carbon turntable comprises a solid lightweight cylindrical turntable and an activated carbon layer fixedly coated on the outer peripheral side wall of the cylindrical turntable, and a rotation shaft is arranged at the center of both ends of the cylindrical turntable, the upper end of the connecting bracket is rotatably connected to the rotation shaft, and the lower end is fixedly connected to the annular revolution conveying device; the annular revolution conveying device rotates around the flow direction of the wastewater under the action of the driving device, and each of the activated carbon turntable assemblies revolves around the center of the wastewater treatment tank in a floating manner under the drive of the annular revolution conveying device, and rotates around its rotation shaft under the action of hydraulic force; The electron accelerator system is arranged above the wastewater treatment pool and at least faces the thin water layer area of ​​the outlet weir and the exposed water surface part of the activated carbon turntable system adjacent to the thin water layer area, and is used to irradiate the activated carbon layer and thin water layer exposed on the water surface with high-energy electron beams.

2. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: A guide device is provided along the wastewater treatment tank, including at least side guide plates arranged at the corners of the side walls around the tank body and an intermediate guide plate arranged in the middle of the tank body, wherein: the outer wall surface of each side guide plate is fixedly arranged on the side walls around the tank body, the inner wall surface is an arc surface, and its vertical height is not lower than the water level; the intermediate guide plate is fixedly arranged at the center of the bottom of the wastewater treatment tank, and its plate surface extends along the length direction of the tank body, and the space between the intermediate guide plate and the side walls around the tank body and each side guide plate forms a revolution channel for the activated carbon turntable system in the wastewater treatment tank, and the annular revolution conveying device is laid on the bottom of the revolution channel.

3. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: The water inlet uniform distribution channel is arranged at one end of the first long side pool wall of the wastewater treatment pool, and its water inlet end is connected to the wastewater source system and is provided with a flow regulating device to control the flow rate and flow rate entering the wastewater treatment pool. The inner channel edge is a semi-closed structure, in which the part facing the incoming wastewater flow is in a closed state, and the part in the forward direction of the incoming wastewater flow lowers the channel edge and is in an open state, and a water distribution trough and a water distribution plate are provided in the open part, the water distribution trough is used to disperse the flow energy of the wastewater, and the water distribution plate is provided with uniformly distributed holes or slit structures.

4. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 3, characterized in that: A coarse particle interception device is provided on the outside of the water inlet uniform distribution channel, which is used to intercept larger suspended matter and particles in the wastewater before the wastewater enters the wastewater treatment tank. The coarse particle interception device includes at least one layer of metal grid and a flushing system. The metal grid is used to filter particles, and the flushing system cleans the surface of the metal grid at regular intervals.

5. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: The annular revolution transmission device includes a driving motor and a transmission mechanism, and the transmission mechanism includes a reducer and a gear transmission system, which are used to transmit the power of the driving motor to the annular revolution transmission device to achieve precise control and stable operation of the activated carbon turntable.

6. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 5, characterized in that: Bearings and bearing seats are respectively provided at both ends of the rotation shaft of the activated carbon turntable, and the connecting bracket includes an upper support arm, a lower fixed seat and an intermediate connecting rod, wherein the upper support arm is connected to the rotation shaft of the activated carbon turntable through a bearing, the lower fixed seat is fixedly connected to the annular revolution transmission device, and the intermediate connecting rod is arranged between the upper support arm and the lower fixed seat. Under the drive of the annular revolution transmission device and the action of wastewater flow, the activated carbon turntable realizes rotation through the rotation shaft and the bearing seat.

7. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: There is a fixed spacing between the multiple activated carbon turntable components of the activated carbon turntable system, and the size of the fixed spacing is optimized according to the flow rate of the wastewater and the pollutant concentration to reduce fluid resistance without affecting the adsorption performance.

8. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: The bottom of the wastewater treatment pool includes an inclined bottom structure with a drain outlet at the lowest point of the bottom for regularly discharging sludge and other solid particles deposited on the bottom of the pool. The inclined bottom structure avoids the accumulation of solid impurities by optimizing the wastewater flow path and, in conjunction with the drain outlet, reduces the interference of sediments with the operation of the activated carbon turntable system.

9. The electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to claim 1, characterized in that: The electron accelerator system also includes an electron beam current adjustment device, which is used to dynamically adjust the electron beam current intensity and irradiation range according to changes in pollutant concentration in the wastewater treatment pool; the beam current adjustment device includes a control module and a sensor module, the sensor module monitors the pollutant concentration and flow rate of the wastewater in real time, transmits data to the control module, and the control module adjusts the beam current intensity and irradiation range according to a preset algorithm.

10. An electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration method, based on the electron beam irradiated activated carbon rotary disk deep treatment wastewater online regeneration system according to any one of claims 1 to 9, characterized in that: The method comprises at least the following steps when implemented: SS1. Wastewater pretreatment and uniform distribution: After pretreatment to remove large suspended solids, industrial wastewater is uniformly discharged into the wastewater treatment pool through the water inlet uniform distribution channel and the wastewater flow direction is guided to be consistent with the revolution direction of the activated carbon turntable. The water level in the wastewater treatment pool is adjusted to the set height by adjusting the water inlet flow rate and flow rate to ensure that the activated carbon turntable is partially exposed above the water surface. After the water level reaches the set height, the driving device of the activated carbon turntable system is started, and the speed of the annular revolution conveyor is adjusted to 0.5-2 rpm, so that the activated carbon turntable can both revolve and rotate under the action of hydraulic pressure; at the same time, the electron accelerator system is turned on and preheated, and the electron beam energy is adjusted to 0.5-2.0MeV and the dose rate is adjusted to 1-10kGy / s; SS2. Wastewater flow optimization and adsorption treatment: Under the synergistic effect of the side guide plates and the middle guide plates, the flow state of wastewater in the treatment tank is adjusted and optimized to prevent the occurrence of dead zones, vortices and short-circuit phenomena; under the synergistic effect of revolution and rotation, the carbon layer of the activated carbon turntable is fully in contact with the wastewater, and the difficult-to-degrade organic pollutants in the wastewater are removed through physical adsorption; By controlling the flow rate of wastewater and the rotation speed of the circular revolution conveyor, the rotation speed of the activated carbon turntable is adjusted to 5-15 rpm to ensure sufficient contact time between the surface of the activated carbon layer and the wastewater and the adsorption efficiency; SS3. Electron beam synchronous irradiation treatment: The electron accelerator system uses high-energy electron beams to synchronously irradiate the part of the activated carbon turntable above the wastewater treatment pool that is exposed to the water surface and the thin water layer at the outlet weir. With the participation of water molecules, strong oxidizing active substances are generated to react with the organic pollutants adsorbed by the activated carbon to decompose the pollutants into carbon dioxide, water and other harmless products. At the same time, the energy of the electron beam penetrates the thin water layer and deeply oxidizes the residual pollutants in the wastewater that are not adsorbed by the activated carbon. The treated wastewater overflows evenly through the outlet weir and meets the preset emission standards. During the electron beam synchronous irradiation treatment process, the pollutant concentration in the irradiation area is monitored in real time, and the beam intensity and irradiation range of the electron beam are dynamically adjusted to adapt to the changes in the concentration of pollutants in the wastewater and ensure energy utilization efficiency. SS4. Online regeneration and recycling of activated carbon: During the electron beam irradiation process, the activated carbon adsorbed with pollutants is regenerated online by receiving irradiation. The electron beam restores the adsorption capacity of the activated carbon by destroying the molecular structure of the organic pollutants adsorbed on the surface of the activated carbon. The regenerated activated carbon re-enters the adsorption area with the revolution of the activated carbon turntable and continues to adsorb the organic pollutants in the wastewater. The dynamic recycling of activated carbon is achieved through the continuous operation of the circular revolution conveyor. SS5. Dynamic optimization of system operating parameters: By monitoring the water quality parameters in the wastewater treatment pool, including the pollutant concentration, flow rate, temperature and water level of the wastewater, the system operating parameters are dynamically adjusted, including the rotation speed of the circular revolution conveyor, the rotation speed of the activated carbon turntable, the water inlet flow rate, and the beam intensity and irradiation range of the electron beam. The operating parameters are optimized according to the preset algorithm to ensure the high efficiency and stability of wastewater treatment, while reducing the energy consumption of the system and adapting to different industrial wastewater treatment needs; SS6. System maintenance and sludge discharge: Regularly discharge the deposited sludge and other solid particles through the sewage outlet at the bottom of the wastewater treatment tank, and separate them from the system operation during the sewage discharge process to avoid interference with the activated carbon turntable and the wastewater flow path. At the same time, regularly clean the water distribution channel, diversion device and electron accelerator to maintain the long-term stable operation of the system.

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