Intelligent multi-phase VOCs terminal treatment device and process

Abstract

The invention discloses an intelligent multiphase VOCs terminal treatment device and process, belongs to terminal treatment devices in pollution treatment equipment, and relates to the field of environmental engineering. The treatment device comprises a cyclone treatment module, a UV photocatalysis module, an enriched solution spraying module, a water curtain oxidation module, an Arduino control unit and the like. Wherein the cyclone treatment module and the UV photocatalysis module form a low-concentration treatment passage, and the enriched solution spraying module and the water curtain oxidation module form a high-concentration treatment passage. According to the intelligent multi-phase VOCs terminal treatment device and process, the treatment modes can be adaptively switched, the VOCs concentration is detected in real time through the gas concentration sensor, low-concentration photocatalysis-adsorption or high-concentration spraying-oxidation treatment channels are automatically switched, resource waste caused by one-step treatment of a traditional device is avoided, operation energy consumption is reduced, the structure is simple and efficient, and the intelligent multi-phase VOCs terminal treatment device and process are suitable for industrial production. Through intelligent stage treatment and multi-technology cooperation, the problems that a traditional VOCs device is low in efficiency, high in energy consumption, poor in adaptability and the like are solved.

Description

Technical Field

[0001] This invention relates to the field of volatile organic compound treatment, specifically to an intelligent multiphase VOCs end-of-pipe treatment device and process. Background Technology

[0002] Volatile organic compounds (VOCs) are a class of hazardous pollutants widely found in industrial wastewater, groundwater, and contaminated sites, characterized by toxicity, carcinogenicity, and environmental persistence. With increasingly stringent environmental regulations and growing public concern about environmental pollution, the efficient treatment of VOCs has become a crucial issue in environmental engineering. In the VOCs pollution control process, end-of-pipe treatment devices serve as the last line of defense for pollutant removal, and their performance directly determines the treatment effectiveness and emission compliance.

[0003] In recent years, aeration-based in-situ extraction technology has gradually attracted attention as a novel air-lift technology. This technology significantly improves gas-liquid mass transfer efficiency and VOCs removal rate by optimizing the design and operating parameters of the aeration device. Furthermore, aeration-based in-situ extraction technology can be combined with various end-of-pipe treatment processes (such as activated carbon adsorption and catalytic oxidation) to form a highly efficient and low-consumption VOCs end-of-pipe treatment system. However, existing aeration-based in-situ extraction end-of-pipe treatment devices still suffer from problems such as unstable treatment efficiency, easy equipment clogging, and high operating costs when treating VOCs of different concentrations.

[0004] Therefore, developing a high-efficiency, stable, and low-cost aeration-based in-situ VOCs extraction end-of-pipe treatment device is of great significance for improving VOCs pollution control and reducing environmental risks. This invention aims to achieve efficient removal of VOCs from gases by optimizing the structure and operation of the aeration device and combining it with a highly efficient end-of-pipe treatment process, thus providing a reliable technical solution for VOCs pollution control. Summary of the Invention

[0005] To address the problems of existing VOCs treatment devices, such as their inability to intelligently distinguish pollutant concentrations, low treatment efficiency, high energy consumption, and high risk of secondary pollution, this invention proposes an intelligent multiphase VOCs end-of-pipe treatment device. By dynamically switching treatment modes through real-time monitoring of VOCs concentration, and combining physical separation, photocatalytic oxidation, chemical absorption, and advanced oxidation technologies, it achieves efficient graded treatment of VOCs with different concentrations.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: Intelligent multiphase VOCs end-of-pipe treatment device, including The cyclone processing module includes a centrifugal separation chamber and a concentration channel. The centrifugal separation chamber is provided with an air inlet and an air outlet at its upper end. The concentration channel is connected to the bottom of the centrifugal separation chamber and is provided with a solid filter device. A gas detection device is provided at the air inlet. The UV photocatalytic module includes an array of ultraviolet lamps, a catalyst support, and an activated carbon adsorption layer. The surface of the catalyst support is honeycomb-shaped and uniformly coated with a photocatalyst. The rear end of the activated carbon adsorption layer is connected to an exhaust pipe. The enrichment solution spraying module includes a delivery pipe and an atomizing nozzle installed on the upper wall of the centrifugal separation chamber. By spraying the enrichment solution, the VOCs gas in the centrifugal separation chamber is brought into full contact with the solution to form a gas-liquid mixture that enriches the VOCs. The water curtain oxidation module includes an annular infusion pipe and several layers of thin-walled cylindrical mesh water curtains. The annular infusion pipe is connected to a concentration channel. The mesh water curtains are installed on a rotating positioning base, and their surfaces are loaded with a solid catalyst. A spherical drainage section is provided at the top to guide the liquid dripping from the annular infusion pipe, allowing it to flow down the outer wall of the mesh water curtain in an extremely thin liquid layer and undergo a catalytic reaction to degrade and enrich VOCs in the liquid phase.

[0007] As an improvement to the above technical solution, the rotating positioning base is provided with a pulley mechanism on its exterior, so that the rotating positioning base can be driven to rotate at a lower speed by a motor with controllable speed, so that it can drive the mesh water curtain to rotate during purification, so that the catalyst loaded on it can be fully utilized.

[0008] As an improvement to the above technical solution, a belt is installed on the pulley at the top of the motor, and the other end of the belt is fixed to the rotating positioning base. The motor installed on the fixed base drives the pulley to rotate the belt, thereby causing the rotating fixed base and the mesh water curtain fixed thereon to rotate slowly.

[0009] Optionally, the centrifugal separation chamber is fixed to the middle of the main body of the end-of-life treatment device by a bracket.

[0010] As an improvement to the above technical solution, the gas detection device includes a gas concentration sensor, a pressure sensor, and a flow rate sensor.

[0011] As an improvement to the above technical solution, the end-processing device also includes an Arduino control unit, which is connected to the gas detection device for data communication and is used for switching the processing mode and controlling the start and stop of the module in the end-processing device.

[0012] The gas detection device detects the concentration, pressure and flow rate of VOCs in the gas in real time and transmits the data to the Arduino control unit so that it can automatically switch to the low concentration treatment path or the high concentration treatment path according to the preset VOCs concentration threshold. As an improvement to the above technical solution, the cyclone treatment module and the UV photocatalysis module form a low-concentration treatment pathway; the enrichment solution spraying module and the water curtain oxidation module form a high-concentration treatment pathway.

[0013] Optionally, the solid filtration device includes a filter bag.

[0014] Optionally, an outlet pipe is formed at the bottom of the concentration channel.

[0015] As an improvement to the above technical solution, the ultraviolet lamp array, titanium dioxide coating carrier and activated carbon adsorption layer are all installed inside a protective cover. The protective cover is made of quartz glass, which has high light transmittance and is corrosion resistant.

[0016] Optionally, the catalyst support is a titanium dioxide-coated honeycomb ceramic support, which generates hydroxyl radicals (·OH) by exciting TiO2 through an array of ultraviolet lamps to degrade VOCs.

[0017] Optionally, the exhaust pipe is connected to an air pump.

[0018] As an improvement to the above technical solution, the enrichment solution is a Tween 80-PMS solution.

[0019] As an improvement to the above technical solution, the enrichment solution spraying module also includes a recovery pipeline, which is connected in sequence to a sedimentation tank and a neutralization tank to recover the Tween80-PMS solution for circulating spraying.

[0020] Optionally, the enrichment solution spraying module is connected to the high-concentration treatment channel via a valve switching mechanism.

[0021] Optionally, the atomizing nozzle is installed on the upper wall of the centrifugal separation chamber, with a spray pressure of 0.5 MPa and a spray particle size of 50-100 μm to ensure sufficient gas-liquid contact.

[0022] Optionally, the water curtain oxidation module is connected to the cyclone treatment module via a flange and is located on the outlet side of the solid filter.

[0023] As an improvement to the above technical solution, a replacement tray is provided between the bottom of the mesh water curtain and the rotating positioning base. The replacement tray has a handle on the outside and a positioning device at the bottom.

[0024] As an improvement to the above technical solution, the rotating positioning base has pores through which liquid can pass.

[0025] As an improvement to the above technical solution, the mesh water curtain is arranged in three concentric and equidistant layers, and the three layers of mesh water curtain are combined as a whole. They are connected and fixed by connecting rods. A cylinder is provided in the middle, and a buckle is provided at the bottom to be snapped into the corresponding slots of the replacement tray and the rotating positioning base.

[0026] As an improvement to the above technical solution, the mesh water curtain, the ring-shaped infusion tube, the rotating positioning base, and the replacement tray are all installed inside the water curtain shell. As an improvement to the above technical solution, the side of the water curtain shell is connected to a compartment door via a hinge. The compartment door is equipped with two replaceable handles, and the water curtain box is sealed by a sealing strip. The compartment door can be opened by replacing the handles.

[0027] Optionally, the water curtain shell is securely fixed to the base by support columns and reinforcing ribs on the bottom fixed base.

[0028] Optionally, the annular infusion tube is provided with a nozzle at its end. Optionally, the rotating positioning base is equipped with a positioning device to ensure that the water curtain and the upper nozzle are in the same position when the mesh water curtain is replaced.

[0029] As an improvement to the above technical solution, the surface of the mesh water curtain is loaded with a supported catalyst for activating persulfate. During the flow process, environmentally polluting organic matter in the mixed liquid reacts under the catalysis and is converted into persulfate (S₂O₈). 2- Rapid oxidation to form SO4 - · and ·OH free radicals completely degrade and enrich VOCs in the liquid phase.

[0030] The present invention also aims to provide an intelligent multiphase VOCs end-of-pipe treatment process, comprising the following steps: VOCs polluting gas enters the device through the cyclone treatment module. The gas detection device installed at the air inlet detects the VOCs concentration, pressure and flow rate in the gas in real time and transmits the data to the Arduino control unit. Based on the preset VOCs concentration threshold, it automatically switches to low concentration or high concentration treatment mode. In the low-concentration treatment mode (VOCs concentration ≤500ppm), VOCs gas first enters the centrifugal separator, where centrifugal force separates particulate matter and droplets to the bottom solid filter device, where particulate matter is separated through the internal filter bag, and the separated gas flows out from the cyclone separator outlet pipe. The gas then enters the UV photocatalytic module, where the titanium dioxide coating on the catalyst support is excited by the UV catalytic lamp array to generate hydroxyl radicals (·OH) to degrade VOCs. The residual VOCs are further captured by the activated carbon adsorption layer, and the purified gas is discharged through the exhaust pipe after being pumped out. In the high-concentration treatment mode (VOCs concentration > 500ppm), the Arduino control unit starts the enrichment solution spraying module. The infusion tube sprays the enrichment solution through the atomizing nozzle, and the enrichment solution comes into full contact with the VOCs gas in the centrifugal separation chamber to form a gas-liquid mixture of enrichment liquid and a large amount of air. The mixed flow enters the solid filter to separate liquid phase impurities, then flows through the outlet pipe into the water curtain oxidation module. From there, it drips through a nozzle at the end of the annular infusion pipe onto the top of the mesh water curtain. The spherical drainage section at the top of the mesh water curtain guides the dripping liquid. A motor on the fixed base drives a pulley, causing the belt to rotate. This, in turn, causes the rotating positioning base, along with the replacement tray and mesh water curtain fixed thereon, to rotate slowly. Under the influence of the Coanda effect and liquid surface tension, the mixed flow will flow down the outer wall of the water curtain in a very thin liquid layer. The surface of the mesh water curtain is loaded with a supported catalyst. During the flow, environmentally polluting organic matter in the mixed liquid reacts under catalysis, being converted into persulfate (S₂O₈). 2- Rapid oxidation to form SO4 - The · and ·OH free radicals completely degrade and enrich VOCs in the liquid phase, and the purified gas is discharged through pipelines.

[0031] As an improvement to the above technical solution, the end-processing process further includes: The treated Tween80-PMS solution is returned to the sedimentation tank for recycling via the recovery pipeline, and flows into the neutralization tank for pH adjustment before the next round of Tween80-PMS solution spraying and circulation. The Tween80-PMS solution is filtered through a sedimentation tank and then recycled, with a daily replenishment loss of ≤2L to ensure that the concentration of the absorbent is stable at 2%. The PMS catalyst is replenished every 7 days, and the pH online monitoring instrument automatically adjusts the pH of the solution to 6-8 to prevent the oxidant from becoming ineffective.

[0032] As an improvement to the above technical solution, the end-processing process further includes: When the catalyst on the mesh water curtain needs to be replaced due to poisoning, open the chamber door on the side of the water curtain housing of the water curtain oxidation module using the replacement handle. The mesh water curtain can be removed from the fixed guide rail groove on the rotating positioning base by using the handle on the replacement tray, and then the mesh water curtain can be taken out for replacement. When reinstalling, first combine the mesh water curtain with the replacement tray, then place it on the rotating positioning base through the opened chamber door, adjust the position until it is locked into the slot, and finally close the chamber door using the replacement handle to complete the installation.

[0033] This invention brings the following beneficial effects: The intelligent multiphase VOCs end-of-pipe treatment device and process of the present invention can adaptively switch the treatment mode. By detecting the VOCs concentration in real time through a gas concentration sensor, it automatically switches between low-concentration photocatalysis-adsorption or high-concentration spray-oxidation treatment pathways, avoiding the resource waste of traditional devices' "one-size-fits-all" treatment, reducing operating energy consumption, and has a simple and efficient structure.

[0034] The cyclone treatment module integrates separation and concentration functions, eliminating the need for additional pretreatment equipment and reducing the overall size of the device. The UV photocatalysis module and activated carbon adsorption layer feature a modular design, facilitating easy replacement and maintenance, reducing operating costs, and enhancing environmental friendliness and safety. The Tween 80-PMS surfactant used in the enrichment solution spray module effectively disperses and stabilizes Fe. 2+ Co 2+ The catalyst, preventing precipitation, remains stable under acidic conditions, effectively improving catalytic efficiency. Furthermore, the treated solution can be recycled to reduce reagent consumption. The water curtain oxidation module utilizes a unique mesh water curtain and spherical guide section to form an extremely thin liquid layer along the outer wall of the water curtain, effectively increasing the gas-liquid contact area and reaction residence time. Simultaneously, low-speed rotation enhances catalyst utilization, resulting in highly efficient catalysis that achieves a degradation rate of over 98% for high-concentration VOCs.

[0035] The device features a fully enclosed pipeline design, eliminating VOCs leakage and secondary pollution. The persulfate oxidant is recyclable and produces no toxic byproducts, meeting the requirements for green governance.

[0036] This invention solves the problems of low efficiency, high energy consumption, and poor adaptability of traditional VOCs devices through intelligent hierarchical processing and multi-technology synergy. It has the advantages of simple operation, low cost, and clean and safe operation, and can be widely used in industrial workshops, contaminated site remediation, municipal sewage treatment and other scenarios, providing an efficient, economical and environmentally friendly integrated solution for VOCs pollution control. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the intelligent multiphase terminal processing device of the present invention; Figure 2 This is a structural view of the cyclone separation module in the intelligent multiphase terminal treatment device of the present invention; Figure 3 This is a structural view of the UV photocatalytic module in the intelligent multiphase end-processing device of the present invention; Figure 4 This is a cross-sectional view of the water curtain oxidation module in the intelligent multiphase end-of-pipe treatment device of the present invention; Figure 5 This is a side view of the water curtain oxidation module in the intelligent multiphase end-of-pipe treatment device of the present invention; Figure 6This is a top view of the intelligent multiphase terminal processing device of the present invention; Figure 7 This is a schematic diagram of the structure of the mesh water curtain in the intelligent multiphase terminal treatment device of the present invention.

[0039] Numbering on the map: 1-Fixed base; 2-Motor; 3-Belt; 4-Pulley; 5-Rotating positioning base; 6-Replacement tray; 7-Hinge; 8-Mesh water curtain; 9-Atomizing nozzle; 10-Door; 11-Replacement handle; 12-Annular infusion tube; 13-Water curtain housing; 14-Flange; 15-Cyclone separator outlet pipe; 16-Solid filter box; 17-Filter bag; 18-Cyclone separator air inlet pipe; 19-Cyclone separator; 20-Enrichment solution infusion tube; 21-Cyclone separator air outlet pipe; 22-UV photocatalytic box; 23-Silicon plate; 24-Ultraviolet catalytic lamp tube; 25-Activated carbon adsorption layer; 26-UV catalytic box exhaust pipe; 27-Air pump; 28-Support column; 29-Reinforcing rib; 801-Support strip; 802-Snap fastener. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Furthermore, the following description is for illustrative purposes and not for limitation, and sets forth specific details such as particular system structures and techniques to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted to avoid unnecessary detail that could obscure the description of the invention.

[0042] Reference Figure 1 The first embodiment of the present invention relates to an intelligent multiphase VOCs end-of-pipe treatment device, including a cyclone treatment module, a UV photocatalysis module, an enrichment solution spraying module, a water curtain oxidation module, a gas concentration sensor, a pressure sensor, a flow rate sensor, an Arduino control unit, etc.; wherein the cyclone treatment module and the UV photocatalysis module form a low-concentration treatment path, and the enrichment solution spraying module and the water curtain oxidation module form a high-concentration treatment path.

[0043] Figure 2 shows the cyclone separation module of this embodiment, which is fixed to the middle of the main body of the end treatment device by a bracket. It mainly includes a centrifugal separation chamber and a concentration channel. The centrifugal separation chamber is provided with an air inlet and an air outlet at the upper end. The high-speed rotating airflow separates the particulate matter and droplets in the gas to the bottom. The concentration channel is connected to the bottom of the centrifugal separation chamber, and a cyclone separator liquid outlet pipe 15 is formed at the bottom of the channel. It is used to guide the enriched VOCs gas to a high-concentration treatment path. A solid filter box 16 is installed inside the solid filter box 16, and a filter bag 17 is provided inside the solid filter box 16.

[0044] A gas detection device, including a gas concentration sensor, a pressure sensor, and a flow rate sensor, is installed at the air inlet. This device monitors the VOCs concentration, pressure, and flow rate in the gas in real time and transmits the data to an Arduino control unit. Based on a preset VOCs concentration threshold, the unit automatically switches between a low-concentration and high-concentration treatment path. By detecting pressure and flow rate at both the air inlet and outlet, excessively high flow rates and pressures can prevent incomplete pollution treatment and potential equipment damage.

[0045] Figure 3 The UV photocatalytic module described in this embodiment is installed at the rear end of the upper air outlet of the cyclone treatment module and connected to the suction pump 27 via a pipeline. The photocatalyst includes, but is not limited to, semiconductor photocatalytic materials such as titanium dioxide and zinc oxide, preferably a nano-titanium dioxide coating. The UV photocatalytic module mainly includes an array of ultraviolet lamps, a catalyst carrier, and an activated carbon adsorption layer 25 installed within a protective cover. The rear end of the activated carbon adsorption layer 25 is connected to an exhaust pipe and the suction pump 27. The catalyst carrier has a honeycomb-like surface and is uniformly coated with nano-scale TiO2 catalyst to increase the gas-solid contact area. The TiO2 is excited by the ultraviolet lamp array (ultraviolet catalytic lamp 24, wavelength set to 254nm) to generate hydroxyl radicals (·OH) that degrade VOCs. The protective cover is made of quartz glass, which has high light transmittance and is corrosion-resistant.

[0046] The enrichment solution spraying module includes an enrichment solution delivery pipe 20 and an atomizing nozzle 9 installed on the upper wall of the centrifugal separation chamber. The atomizing nozzle 9 sprays at a pressure of 0.5 MPa with a spray particle size of 50-100 μm to ensure sufficient gas-liquid contact. By spraying the enrichment solution, the VOCs gas in the centrifugal separation chamber is brought into full contact with the solution to form a gas-liquid mixture enriched with VOCs. This mixture can be switched to a high-concentration treatment path via a valve. The enrichment solution is a solution system capable of absorbing or enriching gaseous VOCs and forming a liquid phase, including but not limited to surfactant solutions and complexing agent solutions. In this embodiment, a composite solution containing surfactant and persulfate, namely Tween80-PMS solution, is preferred. This solution absorbs and enriches VOCs to provide a liquid environment for subsequent catalytic processes. The Tween80-PMS solution can disperse and stabilize the supported catalyst, preventing precipitation and improving catalytic efficiency. It is stable under acidic conditions and can be re-entered into the device for absorption and enrichment after discharge, precipitation, and small-scale replenishment. Therefore, the enrichment solution spraying module also includes a recovery pipeline, which is connected in sequence to the sedimentation tank and the neutralization tank to recover the Tween80-PMS solution for circulating spraying.

[0047] Figure 4 , Figure 5 The diagram shows the water curtain oxidation module of this embodiment. The water curtain oxidation module is connected to the cyclone treatment module via flange 14 and is located on the solid filter outlet side. It mainly includes an annular infusion pipe 12 and a three-layer mesh water curtain 8 in the shape of a thin-walled cylinder. The annular infusion pipe 12 is connected to the cyclone separator outlet pipe 15. The mesh water curtain 8 is mounted on a rotating positioning base 5, which has pores through which liquid can pass. (Refer to...) Figure 7 The mesh water curtain 8 is a thin-walled ring with three concentric and equidistant layers. The three layers of mesh water curtain 8 are combined as a whole and are connected and reinforced by support bars 801. A cylinder is provided in the middle and a buckle 802 is provided at the bottom to be snapped into the corresponding slots of the replacement tray 6 and the rotating positioning base 5.

[0048] The surface of the mesh-like water curtain 8 is loaded with a supported catalyst for activating persulfate. The mesh-like water curtain 8 acts as a solid carrier, and the supported catalyst, such as the cobalt-based catalyst CoSe, is firmly "loaded" onto its surface through processes such as impregnation-calcination or coating. The top of the mesh-like water curtain 8 has a hemispherical protrusion to guide the mixed liquid dripping from the nozzle of the annular infusion pipe 12. Under the influence of the Coanda effect and liquid surface tension, the liquid flows down the outer wall of the mesh-like water curtain 8 in an extremely thin layer of 0.1-0.3 mm, ensuring sufficient contact between the liquid and the outer wall of the water curtain and catalytic reaction to degrade the VOCs enriched in the liquid phase. In this embodiment, the supported catalyst is a substance capable of catalyzing the generation of free radicals from oxidants such as persulfate to degrade organic matter, including homogeneous catalysts such as transition metal ions Fe.2+ The same applies to other transition metal ions that can effectively activate PMS, such as Co. 2+ Mn 2+ Cu 2+ / Cu + All of these can activate PMS through electron transfer to generate sulfate radicals (SO4). - •) and hydroxyl radicals (·OH). During the flow process, environmentally polluting organic matter in the mixed liquid is present in Fe. 2+ Co 2+ Under catalysis, the reaction will be carried out by persulfate ions (S₂O₈). 2- Rapid oxidation to form SO4 - · and ·OH free radicals completely degrade the VOCs enriched in the liquid phase, and finally flow out of the water curtain device.

[0049] Reference Figure 6 The rotating positioning base 5 is externally equipped with a pulley mechanism. A motor 2 with controllable speed can drive the rotating positioning base 5 to rotate at a relatively low speed of 3-5 revolutions per minute, allowing the mesh water curtain 8 to rotate during purification, ensuring full utilization of the catalyst loaded on it. A belt 3 is mounted on the pulley 4 at the top of the motor 2, with the other end of the belt 3 fixed to the rotating positioning base 5. The motor 2, mounted on the fixed base 1, drives the pulley 4 to rotate the belt 3, thereby causing the rotating positioning base 5, along with the mesh water curtain 8 fixed thereon, to rotate slowly. Furthermore, the rotating positioning base 5 is equipped with a positioning device to ensure that the mesh water curtain 8 aligns with the upper spray nozzle in the same position when replacing it.

[0050] Considering that the surface of the mesh water curtain 8 is covered with a lot of dirt, making it difficult to replace, a replacement tray 6 is provided between the bottom of the mesh water curtain 8 and the rotating positioning base 5. The replacement tray 6 has a handle on the outside for easy replacement of the water curtain, and a positioning device is also provided at the bottom. When replacing, first combine the mesh water curtain 8 with the replacement tray 6, then place it on the rotating positioning base 5, and adjust its position until it snaps into the slot to complete the installation.

[0051] The mesh water curtain 8, the annular infusion tube 12, the rotating positioning base 5, and the replacement tray 6 are all installed inside the water curtain housing 13. The water curtain housing 13 is securely fixed to the fixed base 1 by the support column 28 and reinforcing rib 29 on the bottom fixed base 1, ensuring the stability of the device during operation and preventing shaking that could affect the treatment effect. The side of the water curtain housing 13 is connected to a compartment door 10 via a hinge 7. The compartment door 10 is equipped with two replacement handles 11, and a sealing strip ensures the water curtain housing is sealed. The compartment door 10 can be opened by using the replacement handles 11.

[0052] The second embodiment of the present invention relates to an intelligent multiphase VOCs end-of-pipe treatment process, comprising the following steps: When VOCs polluting gas enters the system through the cyclone separator module inlet pipe 18, the gas detection sensor installed at the inlet detects the VOCs concentration, pressure and flow rate in the gas in real time, and transmits the data to the Arduino control unit at a frequency of 30ms / time. The control unit mainly determines whether to automatically switch between low concentration or high concentration processing mode based on the preset VOCs concentration threshold.

[0053] In low-concentration treatment mode (VOCs concentration ≤ 500 ppm), the gas first enters the centrifugal separation chamber of the cyclone separator 19, where centrifugal force separates particulate matter and droplets to the bottom solid filter box 16. The filter bag 17 inside the box further separates the particulate matter, and the separated gas flows out from the cyclone separator outlet pipe 21. Subsequently, the gas enters the UV photocatalytic module in the UV photocatalytic box 22, where the UV lamp array excites the titanium dioxide coating on the carrier silicon plate 23 to generate hydroxyl radicals (·OH), degrading VOCs (residence time ≥ 2 s). Residual VOCs are further captured by the activated carbon adsorption layer 25 (iodine value ≥ 800 mg / g), and the purified gas is discharged from the UV photocatalytic box exhaust pipe 26 via the suction pump 27 (power 1.5 kW) to meet emission standards.

[0054] In high-concentration treatment mode (VOCs concentration > 500ppm), the Arduino control unit starts the enrichment solution spraying module. The enrichment solution infusion tube 20 sprays Tween80-PMS solution (concentration 2%) through the atomizing nozzle 9. In the centrifugal separation chamber of the cyclone separator 19, it fully contacts the VOCs gas to form a gas-liquid mixture of enriched liquid and a large amount of air. The mixed flow enters the solid filter box 16 to separate liquid phase impurities. Wastewater enters the water curtain oxidation module through the cyclone separator outlet pipe 15. The cyclone separator outlet pipe 15 is connected to the annular delivery pipe 12, allowing wastewater to drip from the nozzle at the end of the annular delivery pipe 12 onto the top of the mesh water curtain 8. The spherical drainage section at the top of the mesh water curtain 8 guides the dripping liquid. The motor 2 on the fixed base 1 drives the pulley 4 to rotate the belt 3, which in turn causes the rotating positioning base 5, along with the replacement tray 6 fixed thereon and the mesh water curtain 8, to rotate slowly. Under the influence of the Coanda effect and liquid surface tension, the mixed flow liquid will flow down the outer wall of the water curtain in a very thin liquid layer. Fe in the potassium persulfate (5% concentration) solution on the mesh water curtain 8 2+ Co 2+ The reaction, catalyzed by [catalyst] (residence time ≥ 5 s), produces SO4. - The · and ·OH free radicals completely degrade and enrich VOCs in the liquid phase, and the purified gas is discharged through pipelines.

[0055] Tween80-PMS is stable in persulfate. The treated Tween80-PMS solution is returned to the sedimentation tank for recycling via the recovery pipeline (loss rate ≤5%). After flowing into the neutralization tank (pH adjusted to 6~8), it can be used for the next round of Tween80-PMS solution spraying and circulation.

[0056] When the catalyst on the mesh water curtain 8 needs to be replaced due to poisoning, the two doors 10 connected by the hinge 7 on the side of the water curtain shell 13 can be opened by using the replacement handle 11. The water curtain can then be removed from the fixed guide rail groove on the rotating positioning base 5 by using the handle on the replacement tray 6, and the mesh water curtain 8 can be taken out for replacement. When reinstalling, first combine the mesh water curtain 8 with the replacement tray 6, then place it on the rotating positioning base 5 from the opened door 10, adjust the position until the buckle 802 is engaged in the slot, and finally close the door 10 by using the replacement handle 11 to complete the installation.

[0057] The Tween80-PMS solution is filtered through a sedimentation tank and then recycled, with a daily replenishment loss of ≤2L to ensure that the concentration of the absorbent is stable at 2%. The PMS oxidant is replenished every 7 days, and the pH online monitor automatically adjusts the solution pH to 6-8 to prevent the oxidant from becoming ineffective.

[0058] The UV lamp array, activated carbon adsorption layer 25, and catalyst packing adopt a modular design, allowing for quick replacement during maintenance, with each maintenance session lasting ≤30 minutes. The unit automatically performs a 5-minute self-check daily, monitoring sensor sensitivity, valve sealing, and catalyst activity. If the UV catalytic lamp 24's lifespan is <5000 hours or the activated carbon adsorption saturation is ≥90%, an audible and visual alarm is triggered to prompt maintenance, ensuring long-term stable operation of the unit.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An intelligent multiphase VOCs end-of-pipe treatment device, characterized in that: include The cyclone processing module includes a centrifugal separation chamber and a concentration channel. The centrifugal separation chamber is provided with an air inlet and an air outlet at its upper end. The concentration channel is connected to the bottom of the centrifugal separation chamber and is provided with a solid filter device. A gas detection device is provided at the air inlet. The UV photocatalytic module includes an array of ultraviolet lamps, a catalyst support, and an activated carbon adsorption layer. The surface of the catalyst support is honeycomb-shaped and uniformly coated with a photocatalyst. The rear end of the activated carbon adsorption layer is connected to an exhaust pipe. The enrichment solution spraying module includes a spraying assembly installed on the upper wall of the centrifugal separation chamber, which sprays the enrichment solution to make full contact between the VOCs gas in the centrifugal separation chamber and the solution to form a gas-liquid mixture for enriching VOCs. The water curtain oxidation module includes an annular infusion pipe and several layers of thin-walled cylindrical mesh water curtains. The annular infusion pipe is connected to a concentration channel. The mesh water curtains are installed on a rotating positioning base, and their surfaces are loaded with a solid catalyst. A spherical drainage section is provided at the top of the mesh water curtains so that the mixed liquid dripping from the annular infusion pipe flows down the outer wall of the mesh water curtains in a liquid layer and undergoes a catalytic reaction to degrade and enrich VOCs in the liquid phase.

2. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1, characterized in that: The rotating positioning base is equipped with a pulley mechanism on the outside, which drives the rotating positioning base to rotate at a speed of 3 to 5 revolutions per minute through a motor with controllable speed. This allows the mesh water curtain to rotate slowly during purification, so that the catalyst loaded on it can be fully utilized.

3. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1, characterized in that: The processing device also includes an Arduino control unit, which is connected to the gas detection device for data communication and is used for automatic switching of the processing mode and module start / stop control of the end-processing device.

4. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1, characterized in that: The ultraviolet lamp array, catalyst carrier, and activated carbon adsorption layer are all installed inside a protective cover; The catalyst support is a titanium dioxide-coated honeycomb ceramic support.

5. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1, characterized in that: The enrichment solution is a Tween 80-PMS solution, used to absorb and enrich VOCs, providing a liquid environment for subsequent catalytic processes.

6. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 5, characterized in that: The surface of the mesh water curtain is loaded with a supported catalyst for activating persulfate. During the flow process, environmentally polluting organic matter in the mixed liquid reacts under the catalysis and will be rapidly oxidized and completely degraded, enriching VOCs in the liquid phase.

7. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1 or 6, characterized in that: The mesh water curtain is arranged in three concentric and equidistant layers, which are combined into a whole and connected and fixed by connecting rods. A cylinder is provided in the middle and a buckle is provided at the bottom to be snapped into the corresponding slot of the rotating positioning base.

8. The intelligent multiphase VOCs end-of-pipe treatment device according to claim 1, characterized in that: A replacement tray is provided between the bottom of the mesh water curtain and the rotating positioning base. The replacement tray has a handle on the outside and a positioning device at the bottom. The mesh water curtain, annular infusion tube, rotating positioning base, and replacement tray are all installed inside the water curtain shell.

9. Intelligent multiphase VOCs end-of-pipe treatment process, characterized in that: The process, applied to the intelligent multiphase VOCs end-of-pipe treatment device according to any one of claims 1 to 8, includes the following steps: VOCs polluting gas enters the device through the cyclone treatment module. The gas detection device installed at the air inlet monitors the VOCs concentration, pressure and flow rate in the gas in real time, and automatically switches to low concentration or high concentration treatment mode according to the preset VOCs concentration threshold. In the low-concentration treatment mode, VOCs gas first enters the centrifugal separator, where centrifugal force separates particulate matter and droplets to the bottom solid filter device, where particulate matter is separated through the internal filter bag, and the separated gas flows out from the cyclone separator outlet pipe. The gas then enters the UV photocatalytic module, where the titanium dioxide coating on the catalyst support is excited by the UV catalytic lamp array to degrade VOCs. The residual VOCs are further captured by the activated carbon adsorption layer, and the purified gas is discharged through the exhaust pipe after being pumped out. In the high-concentration treatment mode, the enrichment solution spraying module is activated, and the enrichment solution is sprayed through the spraying components. In the centrifugal separation chamber, it fully contacts the VOCs gas to form a gas-liquid mixture of enrichment liquid and a large amount of air. The mixed flow enters the solid filter to separate liquid phase impurities, then enters the water curtain oxidation module through the outlet pipe. The liquid drips onto the top of the mesh water curtain through the nozzle at the end of the annular infusion pipe. The spherical drainage section at the top of the mesh water curtain guides the dripping liquid. A pulley mechanism on the fixed base causes the rotating positioning base, along with the mesh water curtain fixed thereon, to rotate slowly. Under the influence of the Coanda effect and liquid surface tension, the mixed flow will flow down the outer wall of the water curtain as a liquid layer. The surface of the mesh water curtain is loaded with a supported catalyst. During the flow, the environmentally polluting organic matter in the mixed liquid reacts under catalysis, and is rapidly oxidized and completely degraded, enriching the VOCs in the liquid phase. The purified gas is then discharged through the pipeline.

10. The intelligent multiphase VOCs end-of-pipe treatment process according to claim 9, characterized in that: The processing technology further includes: When the catalyst on the mesh water curtain needs to be replaced due to poisoning, open the chamber door on the side of the water curtain housing of the water curtain oxidation module using the replacement handle. The mesh water curtain can be removed from the fixed guide rail groove on the rotating positioning base by using the handle on the replacement tray, and then the mesh water curtain can be taken out for replacement. When reinstalling, first combine the mesh water curtain with the replacement tray, then place it on the rotating positioning base through the opened chamber door, adjust the position until it is locked into the slot, and finally close the chamber door using the replacement handle to complete the installation.

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