VOC (volatile organic compound) recovery and treatment device in color-coated sheet production process

Abstract

The invention discloses a VOC (volatile organic compound) recovery and treatment device in a color-coated sheet production process, which comprises a sealing cover and a controller, the sealing cover is connected with a transition pipe through an induced draft fan, the transition pipe is connected with a cold liquid pipe through a condenser, the cold liquid pipe is connected with a liquid discharge pipe, the liquid discharge pipe is connected with a liquid collection tank through a liquid collection valve, and the liquid collection tank is connected with a liquid level sensor and the liquid discharge valve. The cold liquid pipe is connected with a gas distributing pipe, the gas distributing pipe is connected with an absorption and desorption tank through a gas inlet valve, a grid support is connected in the absorption and desorption tank, the grid support is connected with an adsorbent, the absorption and desorption tank is connected with a heater and a blower, the absorption and desorption tank is connected with a catalytic combustion chamber through an output valve, and the absorption and desorption tank is connected with a transition pipe through a return valve. The method has the beneficial effects that efficient recovery is achieved, and resource utilization is maximized; deep purification is achieved, and the environment-friendly effect is remarkable; energy is saved, consumption is reduced, and cost is greatly reduced; intelligent control is achieved, and operation is stable and reliable; the structure is optimized, and maintenance is convenient and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment for color-coated plate production, and in particular to a VOC recovery and treatment device in the color-coated plate production process. Background Art

[0002] In the field of color-coated board production, with the acceleration of industrial modernization, the application of color-coated boards has become more and more extensive, covering many industries such as construction, home appliances, and automobiles. However, a large amount of volatile organic compounds (VOCs) will inevitably be generated during its production process. The source of these VOCs is mainly the various types of coatings, solvents, and thinners used in the production of color-coated boards, which evaporate into the atmosphere during the coating and drying processes.

[0003] From the perspective of environmental impact, VOC is one of the main precursors of photochemical smog. Under sunlight, VOC reacts with nitrogen oxides and other substances in a series of complex photochemical reactions to produce secondary pollutants such as ozone and peroxyacetyl nitrate (PAN). These pollutants can seriously affect air quality, reduce atmospheric visibility, and cause great damage to the ecosystem. At the same time, some halogenated hydrocarbon VOCs can also damage the ozone layer, exacerbating the trend of global warming.

[0004] From the perspective of harm to human health, long-term exposure to an environment containing VOCs will seriously threaten the health of operators. Long-term exposure to low-concentration VOCs may cause dizziness, fatigue, drowsiness, nausea, vomiting and other symptoms in the human body, affecting the normal function of the nervous system and respiratory system. Acute exposure to high-concentration VOCs may cause more serious consequences, such as coma, convulsions, and even carcinogenicity, teratogenicity, and mutagenicity, posing a direct threat to the life safety of operators.

[0005] At present, the main VOC treatment technologies in the production process of color-coated plates include direct combustion, adsorption, absorption, etc. Although the direct combustion method can convert VOC into carbon dioxide and water, achieving a certain degree of harmless treatment, this method has extremely high energy consumption and requires a large amount of fuel, which not only increases production costs, but also, in the current situation of increasingly tight energy, this high-energy consumption treatment method does not conform to the concept of sustainable development. At the same time, the direct combustion method cannot recycle the valuable components in VOC, resulting in a huge waste of resources.

[0006] Adsorption is a relatively common treatment method, usually using adsorbents such as activated carbon to adsorb VOCs. However, traditional adsorbents have the problem of low adsorption efficiency and are not effective in treating low-concentration, high-volume VOC waste gas. Moreover, it is difficult to effectively desorb and regenerate the adsorbent after adsorption saturation, and the adsorbent often needs to be replaced frequently, which not only increases the treatment cost, but also generates a large amount of solid waste, bringing about secondary pollution problems. Some simple adsorption devices have design defects and cannot achieve effective separation and reprocessing of the adsorbed VOCs, which greatly reduces the effectiveness of the entire treatment process.

[0007] The absorption method uses a specific absorbent to absorb VOCs in the exhaust gas, but the choice of absorbents is relatively limited, and the solution after absorption is difficult to handle, which is prone to secondary pollution. In addition, the equipment investment cost of the absorption method is high, and the operation and maintenance are complicated, which is a heavy economic burden for small color-coated plate manufacturers.

[0008] In summary, the existing VOC treatment technology in the production process of color-coated boards has many problems and cannot meet the requirements of high efficiency, energy saving and environmental protection. Therefore, it is of great practical significance to develop an innovative VOC recovery and treatment device in the production process of color-coated boards that can overcome the defects of the existing technology. This will not only help improve the environmental protection status of color-coated board manufacturers and reduce production costs, but also make positive contributions to environmental protection and sustainable development. Summary of the invention

[0009] In order to solve the above problems, especially to address the deficiencies in the prior art, the present invention provides a VOC recovery and treatment device in the production process of color-coated plates that can solve the above problems.

[0010] To achieve the above purpose, the present invention adopts the following technical means:

[0011] A VOC recovery and treatment device in the production process of color-coated plates comprises a sealing cover and a controller, wherein the sealing cover is connected to a transition pipe through an induced draft fan, the transition pipe is connected to a cold liquid pipe through a condenser, the bottom of the cold liquid pipe is connected to a drain pipe, the drain pipe is connected to a liquid collecting tank through a liquid collecting valve, the liquid collecting tank is connected to a liquid level sensor and a drain valve, the cold liquid pipe is connected to an air distribution pipe, the air distribution pipe is connected to a plurality of adsorption and decomposition tanks through a plurality of groups of intake valves, the adsorption and decomposition tank is connected to a plurality of groups of grid brackets equidistantly distributed from top to bottom, the top of the grid bracket is connected to an adsorbent, the adsorption and decomposition tank is connected to a heater, the adsorption and decomposition tank is connected to a hair dryer corresponding to the heater, the top of the adsorption and decomposition tank is connected to a catalytic combustion chamber through an output valve, the top of the adsorption and decomposition tank is connected to the transition pipe through a reflux valve, the induced draft fan, condenser, liquid collecting valve, liquid level sensor, drain valve, catalytic combustion chamber, output valve, reflux valve, hair dryer, heater and intake valve are respectively connected to the controller.

[0012] A further solution of the present invention is that a filter screen is connected to the air inlet of the sealing cover.

[0013] A further solution of the present invention is that the inner wall of the sealing cover is connected to a plurality of groups of evenly distributed VOC sensors, and the VOC sensors are connected to a controller.

[0014] A further solution of the present invention is that the cooling liquid pipe is a curved pipe, and the drain pipe is arranged at the curved point of the cooling liquid pipe.

[0015] A further solution of the present invention is that a support rod is connected to the bottom of the gas distribution pipe.

[0016] A further solution of the present invention is that the controller includes a control cabinet, a cabinet door is hinged at the opening of the control cabinet, a power supply module and a PLC controller are connected inside the control cabinet, and a touch screen is inlaid on the cabinet door, the induced draft fan, condenser, liquid collecting valve, drain valve, catalytic combustion chamber, output valve, reflux valve, hair dryer, heater, air intake valve, PLC controller, and touch screen are respectively connected to the power supply module, the power supply module is connected to an external power supply, and the induced draft fan, condenser, liquid collecting valve, liquid level sensor, drain valve, catalytic combustion chamber, output valve, reflux valve, hair dryer, heater, air intake valve, and touch screen are respectively connected to the PLC controller.

[0017] A further solution of the present invention is that the grid bracket is made of stainless steel.

[0018] A further solution of the present invention is that the grid support is connected to the interior of the adsorption-desorption tank via a slide rail, and one side of the grid support is connected to an inlaid sealing plate inlaid with the side wall of the adsorption-desorption tank.

[0019] A further embodiment of the present invention is that the adsorbent is an activated carbon fiber product.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention can achieve efficient recycling and maximize resource utilization: the device adopts an innovative process that combines condensation and adsorption. In the early stage of waste gas treatment, some easily condensable VOCs are converted into liquid for recovery through a condenser, which effectively reduces the load of subsequent adsorption treatment. Next, activated carbon fiber is used as an adsorbent. It has a large specific surface area and rich microporous structure, and exhibits ultra-high adsorption efficiency and adsorption capacity for the remaining VOCs, and can almost completely capture the VOCs in the waste gas. The recovered VOCs can be reprocessed or sold as resources, which significantly improves resource utilization, reduces resource waste, and brings additional economic benefits to the enterprise.

[0022] 2. The present invention has deep purification and remarkable environmental protection effect: after dual treatment of condensation and adsorption, the VOC content in the exhaust gas is greatly reduced. For the high-concentration VOC gas after desorption, it is introduced into the catalytic combustion chamber for harmless treatment. Under the action of the catalyst, VOC can be fully burned at a lower temperature and converted into harmless substances such as carbon dioxide and water and discharged into the atmosphere, which greatly reduces the pollution to the environment, meets the increasingly stringent environmental emission standards, and helps to improve the surrounding air quality and protect the ecological environment.

[0023] 3. The present invention saves energy and reduces consumption, and the cost is greatly reduced: Compared with the traditional direct combustion method, the present device does not need to continuously consume a large amount of fuel to maintain high-temperature combustion, and the energy consumption is significantly reduced. Through the intelligent control system, the working parameters of each component are accurately adjusted according to the concentration of VOC in the exhaust gas and the operating status of the equipment, avoiding ineffective loss of energy. At the same time, the efficient adsorption performance and good regeneration ability of the adsorbent reduce the replacement frequency of the adsorbent and reduce the cost of consumables. In addition, the recovered VOC resources can create economic value and further reduce the comprehensive operating costs of the enterprise.

[0024] 4. The present invention has intelligent control and stable and reliable operation: it is equipped with an advanced PLC controller and a touch screen human-computer interaction interface to achieve full automation and intelligent operation of the equipment. The VOC sensor monitors the VOC concentration in the sealing cover in real time, and the liquid level sensor accurately feeds back the liquid level information of the liquid collecting tank. These data are transmitted to the PLC controller in real time. The PLC controller automatically controls the start and stop and operating parameters of equipment such as the induced draft fan, condenser, various valves, blowers, heaters, etc. according to preset programs and real-time data to ensure that the equipment is always in the best operating state. It not only improves the operating efficiency and stability of the equipment, but also reduces manual intervention, reduces the risk of manual operating errors, and improves the safety and reliability of production.

[0025] 5. The present invention has an optimized structure and convenient and efficient maintenance: the various components of the device adopt a modular design with a compact and reasonable structure. For example, the grid bracket in the adsorption and desorption tank is connected to the tank body through a slide rail, which is convenient for disassembly and installation, replacement of adsorbents and maintenance of the equipment. At the same time, the connection method of the sealing cover, transition pipe, cold liquid pipe and other components is simple and reliable, which reduces the risk of leakage and is easy to repair and replace, reducing the maintenance difficulty and maintenance cost of the equipment and increasing the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 is a cross-sectional view of the sealing cover of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the cold liquid pipe of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the liquid collecting tank of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the gas distribution pipe of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the controller of the present invention;

[0032] Figure 7 It is a cross-sectional view of the adsorption-desorption tank of the present invention;

[0033] Reference numerals:

[0034] Sealing cover 1, filter screen 2, VOC sensor 3, induced draft fan 4, transition pipe 5, condenser 6, cold liquid pipe 7, drain pipe 8, liquid collecting valve 9, liquid collecting tank 10, liquid level sensor 11, drain valve 12, gas distribution pipe 13, support rod 14, catalytic combustion chamber 15, controller 16, adsorption and decomposition tank 17, slide rail 18, grid bracket 19, inlaid sealing plate 20, adsorbent 21, output valve 22, reflux valve 23, hair dryer 24, heater 25, air inlet valve 26, control cabinet 161, power module 162, PLC controller 163, cabinet door 164, touch screen 165. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 1-7As shown, a VOC recovery and treatment device in the production process of color-coated plates includes a sealing cover 1 and a controller 16. The sealing cover 1 is connected to a transition pipe 5 through an induced draft fan 4. The transition pipe 5 is connected to a cold liquid pipe 7 through a condenser 6. The bottom of the cold liquid pipe 7 is connected to a drain pipe 8. The drain pipe 8 is connected to a liquid collecting tank 10 through a liquid collecting valve 9. The liquid collecting tank 10 is connected to a liquid level sensor 11 and a drain valve 12. The cold liquid pipe 7 is connected to an air distribution pipe 13. The air distribution pipe 13 is connected to a plurality of adsorption and decomposition tanks 17 through a plurality of air inlet valves 26. The adsorption and decomposition tanks 17 are connected to a plurality of meshes equidistantly distributed from top to bottom. A grid bracket 19 is provided, and the top of the grid bracket 19 is connected to an adsorbent 21. A heater 25 is connected inside the adsorption-decomposition tank 17. A hair dryer 24 corresponding to the heater 25 is connected outside the adsorption-decomposition tank 17. The top of the adsorption-decomposition tank 17 is connected to the catalytic combustion chamber 15 through an output valve 22. The top of the adsorption-decomposition tank 17 is connected to the transition pipe 5 through a reflux valve 23. The induced draft fan 4, the condenser 6, the liquid collecting valve 9, the liquid level sensor 11, the drain valve 12, the catalytic combustion chamber 15, the output valve 22, the reflux valve 23, the hair dryer 24, the heater 25, and the air intake valve 26 are respectively connected to the controller 16.

[0038] How it works

[0039] Waste gas collection: During the production process of color-coated plates, the waste gas containing volatile organic compounds (VOC) will first be collected by the sealing cover 1. Under the action of the induced draft fan 4, the waste gas is drawn into the transition duct 5. The power provided by the induced draft fan 4 is the driving force for the waste gas to flow in the entire device.

[0040] Condensation treatment: The exhaust gas entering the transition pipe 5 immediately enters the condenser 6. The condenser 6 reduces the temperature of the exhaust gas through the refrigeration system, so that the VOC with a higher boiling point in the exhaust gas changes from gas to liquid. This process utilizes the principle of phase change of matter. The condensed liquid VOC flows downward along the cold liquid pipe 7, and the condensate flows into the liquid collecting tank 10 through the drain pipe 8 under the control of the liquid collecting valve 9. The liquid level sensor 11 connected to the liquid collecting tank 10 monitors the liquid level in the tank in real time. When the liquid level reaches the set upper limit, the liquid level sensor 11 transmits a signal to the controller 16, and the controller 16 controls the drain valve 12 to open, and discharges the condensate for subsequent treatment or recycling.

[0041] Adsorption treatment: After the condensation treatment, the waste gas still contains some low-boiling-point VOCs, which enter multiple adsorption and decomposition tanks 17 through the gas distribution pipe 13. The adsorption and decomposition tank 17 is equipped with multiple groups of grid brackets 19 distributed equidistantly from top to bottom, and activated carbon fiber adsorbents 21 are placed on the brackets. Activated carbon fiber has a large specific surface area and rich microporous structure. When the waste gas passes through, VOC molecules will be adsorbed on the surface and micropores of the activated carbon fiber, thereby purifying the waste gas. After the adsorbent 21 reaches adsorption saturation, the grid bracket 19 can be pulled out and replaced with a new adsorbent 21; or, it can be desorbed and regenerated for reuse. At this time, the air inlet valve 26 and the output valve 22 of the adsorption-desorption tank 17 are closed, and the hair dryer 24 and the heater 25 are turned on. The hair dryer 24 blows the outside air into the adsorption-desorption tank 17, and the heater 25 heats the air. When the hot air flows through the adsorbent 21, the VOC adsorbed on the activated carbon fiber is desorbed by heat and turned into a gaseous state again. It is refluxed to the transition pipe 5 through the reflux valve 23 and enters the entire condensation treatment process again for treatment.

[0042] Combustion treatment: The adsorbed gas still contains VOC that has not been completely treated. At this time, the adsorbed gas enters the catalytic combustion chamber 15 through the output valve 22. In the catalytic combustion chamber 15, the catalyst reduces the activation energy of VOC combustion, allowing VOC to react chemically with oxygen at a relatively low temperature, completely burn to generate harmless substances such as carbon dioxide and water, and discharge them into the atmosphere.

[0043] Intelligent control: The entire device is intelligently controlled by the controller 16. The controller 16 receives data from various sensors. According to the preset program and the received real-time data, the controller 16 accurately controls the speed of the induced draft fan 4, the cooling capacity of the condenser 6, the switch status of each valve, the air volume of the blower 24, the temperature of the heater 25, etc., effectively realizing the automation and intelligent operation of the equipment and improving the processing efficiency and stability.

[0044] Example 2

[0045] like Figure 1-7As shown, a VOC recovery and treatment device in the production process of color-coated plates includes a sealing cover 1 and a controller 16. The sealing cover 1 is connected to a transition pipe 5 through an induced draft fan 4. The transition pipe 5 is connected to a cold liquid pipe 7 through a condenser 6. The bottom of the cold liquid pipe 7 is connected to a drain pipe 8. The drain pipe 8 is connected to a liquid collecting tank 10 through a liquid collecting valve 9. The liquid collecting tank 10 is connected to a liquid level sensor 11 and a drain valve 12. The cold liquid pipe 7 is connected to an air distribution pipe 13. The air distribution pipe 13 is connected to a plurality of adsorption and decomposition tanks 17 through a plurality of air inlet valves 26. The adsorption and decomposition tanks 17 are connected to a plurality of meshes equidistantly distributed from top to bottom. A grid bracket 19 is provided, and the top of the grid bracket 19 is connected to an adsorbent 21. A heater 25 is connected inside the adsorption-decomposition tank 17. A hair dryer 24 corresponding to the heater 25 is connected outside the adsorption-decomposition tank 17. The top of the adsorption-decomposition tank 17 is connected to the catalytic combustion chamber 15 through an output valve 22. The top of the adsorption-decomposition tank 17 is connected to the transition pipe 5 through a reflux valve 23. The induced draft fan 4, the condenser 6, the liquid collecting valve 9, the liquid level sensor 11, the drain valve 12, the catalytic combustion chamber 15, the output valve 22, the reflux valve 23, the hair dryer 24, the heater 25, and the air intake valve 26 are respectively connected to the controller 16.

[0046] The air inlet of the sealing cover 1 is connected with a filter screen 2 .

[0047] The advantages of the above settings are:

[0048] Ensure the normal operation of the equipment: effectively intercept large particles of impurities in the exhaust gas, such as dust, paint residue, etc., to prevent them from entering the subsequent key equipment such as the induced draft fan 4, condenser 6, adsorption and decomposition tank 17, avoid equipment failure due to impurity accumulation, and ensure that the exhaust gas treatment process is carried out continuously and stably.

[0049] Improve the treatment effect: prevent large particle impurities from interfering with subsequent condensation, adsorption and other treatment links, ensure efficient cooling and condensation of the condenser 6, make the activated carbon fiber adsorbent 21 fully play its role, and improve the recovery and purification effect of VOC.

[0050] Reduce maintenance costs: reduce equipment damage caused by impurities, reduce the frequency of equipment maintenance and replacement of parts, reduce the manpower, material and time costs required for maintenance, and improve enterprise production efficiency.

[0051] Extend the service life of equipment: reduce the wear and corrosion of impurities on the precision parts inside the equipment, such as the impeller of the induced draft fan 4, the pipe of the condenser 6, etc., thereby extending the service life of the entire equipment and reducing the investment in equipment renewal.

[0052] The inner wall of the sealing cover 1 is connected to a plurality of evenly distributed VOC sensors 3 , and the VOC sensors 3 are connected to the controller 16 .

[0053] The advantages of the above settings are:

[0054] Real-time monitoring and data collection

[0055] Accurately obtain concentration information: The evenly distributed VOC sensors 3 can monitor the VOC concentration at different positions in the sealing cover 1 in real time and accurately, avoiding the problem of inaccurate monitoring due to local concentration differences, and providing operators with comprehensive and accurate exhaust gas concentration data, so that they can timely grasp the VOC emission situation during the production process.

[0056] Forming data records: After these sensors are connected to the controller 16, the monitored data can be stored and recorded to form a complete concentration change curve and data report, providing strong data support for the analysis and optimization of the production process, and facilitating the enterprise to carry out production management and environmental assessment.

[0057] Intelligent control and safety warning

[0058] Realize automatic control: VOC sensor 3 transmits monitoring data to controller 16 in real time. Controller 16 automatically adjusts the operating parameters of equipment such as induced draft fan 4, condenser 6, adsorption and decomposition tank 17 according to preset thresholds and logics, realizes intelligent control of VOC recovery and treatment device, improves treatment efficiency and effect, and ensures that the device is always in the best operating state.

[0059] Timely safety warning: When the VOC sensor 3 detects that the VOC concentration in the sealing cover 1 exceeds the safety threshold, it can quickly trigger the alarm system through the controller 16 to remind the staff to take timely measures to prevent safety accidents such as explosions, poisoning, etc., to ensure the safety of production personnel and the safe operation of production facilities.

[0060] Optimization and cost control

[0061] Optimize the treatment process: Through the concentration information fed back in real time by the VOC sensor 3, the staff can understand the rules and characteristics of the exhaust gas generation, and then optimize the entire treatment process, such as adjusting the replacement time of the adsorbent 21, optimizing the temperature and time of catalytic combustion, etc., to improve the recovery and treatment efficiency of VOC and reduce the treatment cost.

[0062] Reduce resource waste: Accurate VOC concentration monitoring helps avoid resource waste caused by over- or under-treatment. When the concentration is low, the operating power of the treatment equipment can be appropriately reduced; when the concentration is high, the treatment intensity can be increased in a timely manner to ensure that while effectively treating VOCs, energy and resources are used reasonably to reduce the company's operating costs.

[0063] The cooling liquid pipe 7 is a curved pipe, and the drain pipe 8 is arranged at the curved point of the cooling liquid pipe 7 .

[0064] The advantages of the above settings are:

[0065] Optimizing condensation

[0066] Increase contact time: The curved tube structure lengthens the flow path of the cooling liquid in the tube, increasing the heat exchange time between the cooling liquid and the exhaust gas. Taking the treatment of organic exhaust gas as an example, a longer heat exchange time can give the VOC in the exhaust gas a more complete opportunity to be cooled, making it easier to transform from gas to liquid, thereby improving the efficiency of condensation recovery and recovering more valuable organic matter.

[0067] Promote uniform cooling: When the cooling liquid flows in the bend, a complex flow field is formed, making the contact between the cooling liquid and the exhaust gas more uniform. In some processes that require high-precision temperature control, this uniform cooling can avoid local overheating or overcooling, ensure the temperature stability of the entire sealing cover 1, and help improve the stability of the production process and product quality.

[0068] Facilitates drainage and prevents fluid accumulation

[0069] Draining by gravity: The drain pipe 8 is set at the bend point, just at the low point of the cold liquid flow, so that the condensed liquid can flow naturally into the drain pipe 8 by gravity. For example, when treating moist industrial waste gas, the condensed water can be quickly discharged through the drain pipe 8 to prevent accumulation in the cold liquid pipe 7, avoiding problems such as pipeline corrosion and blockage caused by liquid accumulation, and ensuring the normal operation of the system.

[0070] Avoid pressure fluctuations: If there is liquid accumulation in the cold liquid pipe 7, it will affect the flow of the cold liquid and cause pressure fluctuations. The drain pipe 8 is set at the bend point to discharge the liquid in time and maintain the pressure stability of the cold liquid system. This is very important for the stable operation of some equipment that is sensitive to pressure changes, such as vacuum pumps and compressors, which helps to extend the service life of the equipment and reduce equipment failures caused by pressure problems.

[0071] Improve space utilization and system layout rationality

[0072] Flexible layout: The cold liquid pipe 7 in the form of a curved pipe can better adapt to different space shapes and equipment layouts. In some industrial sites with limited space, the curved pipe can be flexibly arranged according to the location and spatial direction of the surrounding equipment, making the layout of the entire exhaust gas treatment system more compact and reasonable, and effectively utilizing limited space resources.

[0073] Easy maintenance and overhaul: The drain pipe 8 is arranged at the bend point, so that the position of the drain pipe 8 is relatively independent and easy to access, which is convenient for the staff to inspect, clean and repair the drain pipe 8 during equipment maintenance and overhaul. At the same time, the curved pipe structure is also convenient for setting up necessary overhaul channels and operating spaces around it, which improves the maintainability of the system.

[0074] A support rod 14 is connected to the bottom of the gas distribution pipe 13 .

[0075] The advantages of the above settings are:

[0076] Enhance structural stability

[0077] Supporting the gas distribution pipe 13: The support rod 14 can provide additional support for the gas distribution pipe 13, especially when the gas distribution pipe 13 is long or at a high position, to prevent it from sagging, deforming or even breaking due to its own weight, airflow pressure and other factors, thereby ensuring that the gas distribution pipe 13 remains in the designed position and state, thereby ensuring the stability of the entire gas delivery system.

[0078] Disperse the force: The force borne by the gas distribution pipe 13 is evenly transferred to the ground or other supporting structures through the support rod 14, so as to avoid excessive local force on the gas distribution pipe 13, thereby extending the service life of the gas distribution pipe 13 and reducing problems such as gas leakage caused by structural damage.

[0079] Optimized air distribution

[0080] Auxiliary positioning: The support rod 14 can keep the gas distribution pipe 13 at a suitable height and position, which helps to evenly distribute and flow the gas in the gas distribution pipe 13. For example, in some systems that require uniform gas supply to multiple devices, the precise fixation of the position of the gas distribution pipe 13 can ensure a more balanced gas flow in each branch pipe and improve the operating efficiency of the entire system.

[0081] Reduce air flow disturbance: The stable gas distribution pipe 13 can reduce air flow disturbance caused by pipeline shaking and other reasons, make the gas flow smoothly in the pipe, reduce pressure fluctuations and noise caused by air flow disturbance, and is conducive to improving the quality and efficiency of gas transportation.

[0082] Easy to install and maintain

[0083] Easy installation: The support rod 14 provides a clear support point and positioning reference for the installation of the gas distribution pipe 13. The installer can more conveniently fix the gas distribution pipe 13 at the specified position, thereby improving the accuracy and efficiency of the installation and reducing the adjustment and correction work during the installation process.

[0084] Maintenance safety: When maintaining the gas distribution pipe 13, the support rod 14 can be used as a stable supporting structure to provide maintenance personnel with a better operating platform and safety guarantee, making it easier for them to inspect, repair and replace parts of the gas distribution pipe 13.

[0085] Space utilization and layout optimization

[0086] Reasonable location: The support rod 14 can be flexibly arranged according to the actual space conditions, so that the gas distribution pipe 13 can better adapt to different space layouts and make full use of limited space. For example, in some compact industrial plants, by reasonably arranging the support rod 14, the gas distribution pipe 13 can be installed at a suitable height to avoid interference with other equipment or pipelines.

[0087] Neat and beautiful: The gas distribution pipe 13 is neatly fixed at a certain position by the support rod 14, making the layout of the entire gas delivery system more regular and beautiful, which is conducive to improving the overall image of the workshop or equipment, and is also convenient for on-site management and identification.

[0088] Example 3

[0089] like Figure 1-7 As shown, a VOC recovery and treatment device in the production process of color-coated plates includes a sealing cover 1 and a controller 16. The sealing cover 1 is connected to a transition pipe 5 through an induced draft fan 4. The transition pipe 5 is connected to a cold liquid pipe 7 through a condenser 6. The bottom of the cold liquid pipe 7 is connected to a drain pipe 8. The drain pipe 8 is connected to a liquid collecting tank 10 through a liquid collecting valve 9. The liquid collecting tank 10 is connected to a liquid level sensor 11 and a drain valve 12. The cold liquid pipe 7 is connected to an air distribution pipe 13. The air distribution pipe 13 is connected to a plurality of adsorption and decomposition tanks 17 through a plurality of air inlet valves 26. The adsorption and decomposition tanks 17 are connected to a plurality of meshes equidistantly distributed from top to bottom. A grid bracket 19 is provided, and the top of the grid bracket 19 is connected to an adsorbent 21. A heater 25 is connected inside the adsorption-decomposition tank 17. A hair dryer 24 corresponding to the heater 25 is connected outside the adsorption-decomposition tank 17. The top of the adsorption-decomposition tank 17 is connected to the catalytic combustion chamber 15 through an output valve 22. The top of the adsorption-decomposition tank 17 is connected to the transition pipe 5 through a reflux valve 23. The induced draft fan 4, the condenser 6, the liquid collecting valve 9, the liquid level sensor 11, the drain valve 12, the catalytic combustion chamber 15, the output valve 22, the reflux valve 23, the hair dryer 24, the heater 25, and the air intake valve 26 are respectively connected to the controller 16.

[0090] The controller 16 includes a control cabinet 161, a cabinet door 164 is hinged at the opening of the control cabinet 161, a power module 162 and a PLC controller 163 are connected inside the control cabinet 161, and a touch screen 165 is embedded in the cabinet door 164. The induced draft fan 4, condenser 6, liquid collecting valve 9, drain valve 12, catalytic combustion chamber 15, output valve 22, reflux valve 23, hair dryer 24, heater 25, air intake valve 26, PLC controller 163, and touch screen 165 are respectively connected to the power module 162, and the power module 162 is connected to an external power supply. The induced draft fan 4, condenser 6, liquid collecting valve 9, liquid level sensor 11, drain valve 12, catalytic combustion chamber 15, output valve 22, reflux valve 23, hair dryer 24, heater 25, air intake valve 26, and touch screen 165 are respectively connected to the PLC controller 163.

[0091] The advantages of the above settings are:

[0092] Realize automation and intelligent control: By connecting with various devices through the PLC controller 163, the operation of the induced draft fan 4, condenser 6 and other equipment can be automatically regulated according to the preset program and real-time data. For example, according to the exhaust gas concentration monitored by the VOC sensor 3, the speed of the induced draft fan 4 is automatically adjusted to ensure the exhaust gas treatment efficiency and reduce energy consumption.

[0093] Easy to operate and monitor: The touch screen 165 embedded in the cabinet door 164 provides an intuitive and convenient interactive interface for operators, who can view the equipment operation status and parameters in real time, and can also perform operations such as parameter setting and fault diagnosis, thereby reducing the difficulty of operation and improving work efficiency.

[0094] Ensure stable power supply for equipment: The power module 162 is connected to an external power source to supply power to each device, the PLC controller 163, and the touch screen 165, ensuring stable operation of the system. At the same time, the power supply can be managed and distributed to improve energy efficiency.

[0095] Convenient maintenance and overhaul: The control cabinet 161 adopts a hinged cabinet door 164 design, which is easy to open and has a clear layout of internal components, making it easy for technicians to perform maintenance, overhaul, and replace components, shortening troubleshooting and repair time and reducing equipment downtime.

[0096] Strong system scalability: PLC controller 16 is flexible in programming. If you need to add or modify equipment functions later, you only need to adjust the program without large-scale hardware changes, which facilitates system upgrades and expansions to meet different production needs.

[0097] The grid support 19 is made of stainless steel.

[0098] The advantages of the above settings are:

[0099] Good corrosion resistance

[0100] Resistant to chemical corrosion: Stainless steel contains alloy elements such as chromium and nickel, which can form a dense chromium oxide protective film on the surface, making it have excellent corrosion resistance. In some environments with acid and alkali chemicals, such as chemical workshops and electroplating plants, the grid bracket 19 is not easily corroded. Compared with ordinary metal brackets, it has a longer service life and can effectively reduce replacement costs.

[0101] Moisture-proof and rust-proof: Even in humid environments, such as food processing plants, bathrooms and other places, the stainless steel grid bracket 19 is not easy to rust. This not only maintains the stable performance of the bracket, but also prevents rust from contaminating the surrounding environment or objects, ensuring safe and hygienic use.

[0102] High strength and stability

[0103] Strong bearing capacity: Stainless steel has high strength and hardness and can bear a large weight. For the grid bracket 19, this means that it can support heavier items, such as in warehousing logistics, it can carry a large amount of goods, is not prone to deformation or breakage, and ensures the storage safety of goods.

[0104] Stable structure: Stainless steel has good rigidity and toughness, so that the grid bracket 19 can maintain good structural stability when subjected to external forces. In the case of vibration, impact, etc., such as when used in some mechanical equipment or vehicles, it is not easy to loosen or shift, thereby ensuring the reliability of the entire system.

[0105] Hygiene and Environmental Protection

[0106] Easy to clean: Stainless steel has a smooth surface and is not easy to absorb pollutants such as dust, oil and bacteria. It is very easy to clean. It can be restored to cleanliness by wiping with a damp cloth or detergent. It is especially suitable for places with high hygiene requirements, such as kitchens, hospitals, laboratories, etc., which helps to keep the environment clean.

[0107] Non-toxic and harmless: Stainless steel is non-toxic, will not release harmful substances, and will not cause harm to human health and the surrounding environment. When used in food processing, pharmaceutical production and other fields, it can ensure the quality and safety of the product and comply with relevant health standards and regulatory requirements.

[0108] Beautiful and durable

[0109] Modern appearance: Stainless steel has a metallic luster, simple and beautiful appearance, and a modern feel. Whether in home, office or commercial places, the stainless steel grid bracket 19 can blend well with the surrounding environment, enhance the overall decorative effect, and add a fashionable atmosphere to the space.

[0110] Durable and as good as new: Due to its corrosion resistance and rust resistance, the stainless steel grid bracket 19 can still maintain a good appearance after long-term use. It will not fade or rust like brackets made of other materials. It always remains in a brand new state and has high decorative and use value.

[0111] Recyclability

[0112] Environmental protection and energy saving: Stainless steel is a recyclable material. After the service life of the grid bracket 19 ends, it can be recycled and reprocessed to reduce the waste of resources and waste emissions to the environment. This meets the requirements of modern society for environmental protection and sustainable development, and reduces dependence on natural resources.

[0113] The grid support 19 is connected to the interior of the adsorption-decomposition tank 17 via a slide rail 18 , and one side of the grid support 19 is connected to an inlaid sealing plate 20 inlaid with the side wall of the adsorption-decomposition tank 17 .

[0114] The advantages of the above settings are:

[0115] Easy to install and dismantle

[0116] Quick positioning and installation: The setting of the slide rail 18 provides clear guidance and positioning for the installation of the grid bracket 19. The installer can quickly and accurately install the grid bracket 19 to the specified position inside the adsorption and decomposition tank 17 along the slide rail 18 without complicated measurement and calibration, which greatly improves the installation efficiency.

[0117] Convenient disassembly and maintenance: When the grid bracket 19 or the inside of the adsorption and decomposition tank 17 needs to be repaired, cleaned or parts replaced, the grid bracket 19 can be easily removed from the adsorption and decomposition tank 17 through the slide rail 18, which is convenient for technicians to operate and reduces the difficulty and time cost of maintenance.

[0118] Enhanced stability and sealing

[0119] Stable support: The slide rail 18 can provide stable support for the grid bracket 19, ensuring that the grid bracket 19 maintains a fixed position and posture inside the adsorption and decomposition tank 17. Even if the adsorption and decomposition tank 17 vibrates or is subjected to other external forces during operation, it can effectively prevent the grid bracket 19 from shaking or shifting, thereby ensuring its normal operation.

[0120] Sealing guarantee: The embedded sealing plate 20 is embedded and connected with the side wall of the adsorption and decomposition tank 17, which can effectively fill the gap between the grid bracket 19 and the adsorption and decomposition tank 17, forming a good sealing effect, preventing the leakage of gas, liquid and other media in the adsorption and decomposition tank 17, ensuring the stability of the working environment inside the adsorption and decomposition tank 17, and improving the efficiency and safety of the adsorption and decomposition process.

[0121] Conducive to function realization and optimization

[0122] Flexible position adjustment: The grid support 19 can be adjusted within a certain range through the slide rail 18, so that during the adsorption and desorption process, the position of the grid support 19 can be flexibly changed according to actual needs to optimize the adsorption and desorption effect. For example, the grid support 19 can be adjusted to a position that is more conducive to the distribution of gas or liquid, thereby improving the uniformity and efficiency of adsorption and desorption.

[0123] Protecting the tank wall: The embedded sealing plate 20 not only seals, but also protects the side wall of the adsorption tank 17 to a certain extent. It prevents the grid support 19 from directly contacting the tank wall to cause friction or collision, thereby reducing damage to the tank wall and extending the service life of the adsorption tank 17.

[0124] Easy to inspect and replace

[0125] Good visibility: This connection method allows the grid bracket 19 and the inlaid sealing plate 20 to have good visibility after installation. The staff can easily observe the status of the grid bracket 19 and the sealing plate, and promptly find out whether there are problems such as damage, deformation or poor sealing, which is convenient for preventive maintenance.

[0126] Replacement of components individually: If the grid bracket 19 or the inlaid sealing plate 20 is damaged, since their connection with the adsorption-desorption tank 17 is relatively independent, only the damaged components need to be replaced individually, without large-scale disassembly and replacement of the entire adsorption-desorption tank 17 system, thus reducing maintenance costs and the impact on production.

[0127] The adsorbent 21 is an activated carbon fiber product.

[0128] The advantages of the above settings are:

[0129] Excellent adsorption performance

[0130] High specific surface area: Activated carbon fiber has rich microporous structure and large specific surface area, which can generally reach 1000-3000 square meters / gram. This makes it have a large number of adsorption sites, which can fully contact with pollutants in various gases or liquids, and has good adsorption effect on various organic pollutants and some inorganic pollutants, and can be widely used in air purification, water treatment and other fields.

[0131] Strong adsorption selectivity: It has certain selectivity in the adsorption of different substances, especially for some low-concentration, highly toxic pollutants, such as benzene, formaldehyde, mercury, etc. It has strong adsorption capacity and can effectively remove these harmful substances to protect the environment and human health.

[0132] Fast adsorption kinetics

[0133] Short diffusion path: Compared with traditional granular activated carbon, the fiber diameter of activated carbon fiber is thin, generally between a few microns and tens of microns. The diffusion path of the adsorbate inside the fiber is short and can quickly reach the adsorption site, thereby greatly improving the adsorption speed. It can reach adsorption equilibrium in a shorter time and improve the adsorption efficiency. It is suitable for processing large flow rates and fast changes in pollutant concentrations.

[0134] Good mass transfer performance: The activated carbon fiber has a loose texture and good air permeability, which allows the gas or liquid to pass through the fiber layer smoothly and fully contact with the adsorbent 21, further accelerating the adsorption process and showing excellent performance in the dynamic adsorption process.

[0135] Good chemical stability and mechanical strength

[0136] Chemical stability: Activated carbon fiber has high chemical stability. It can maintain good stability in different acid-base environments and temperature conditions. It is not easy to undergo chemical reactions to change its adsorption properties, and can be used in a variety of complex environments.

[0137] High mechanical strength: It has certain mechanical strength, is not easy to break and pulverize, and can maintain the integrity of the fiber during the adsorption and regeneration process, reduce the loss caused by mechanical wear, extend the service life and reduce the cost of use.

[0138] Renewability and reuse

[0139] Easy thermal regeneration: After the activated carbon fiber is saturated with adsorption, it is relatively easy to regenerate it by heating. At a lower temperature, the pollutants adsorbed on the activated carbon fiber can be desorbed, so that the activated carbon fiber can restore its adsorption capacity and can be reused, reducing the processing cost and meeting the requirements of environmental protection and sustainable development.

[0140] High regeneration efficiency: After multiple regenerations, the adsorption performance of activated carbon fiber does not decrease significantly, and the regeneration efficiency is high. Generally, after multiple regenerations, it can still maintain more than 80% of its initial adsorption performance, with good economy and practicality.

[0141] Good molding and processing performance

[0142] Can be made into various forms: Activated carbon fiber can be easily made into products of various shapes and sizes, such as fiber felt, fiber cloth, honeycomb, etc. It can choose the appropriate shape and specifications according to different application scenarios and equipment requirements, which improves its applicability and installation convenience.

[0143] Good compatibility with other materials: Activated carbon fiber can be used in combination with other materials, such as glass fiber, carbon fiber, etc., to make composite materials with multiple properties, further expanding its application areas and improving overall performance.

[0144] The examples given in the present invention are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A VOC recovery and treatment device in the production process of color-coated plates, characterized in that: The invention comprises a sealing cover (1) and a controller (16); the sealing cover (1) is connected to a transition pipe (5) via an induced draft fan (4); the transition pipe (5) is connected to a cold liquid pipe (7) via a condenser (6); the bottom of the cold liquid pipe (7) is connected to a drain pipe (8); the drain pipe (8) is connected to a liquid collecting tank (10) via a liquid collecting valve (9); the liquid collecting tank (10) is connected to a liquid level sensor (11) and a drain valve (12); the cold liquid pipe (7) is connected to an air distribution pipe (13); the air distribution pipe (13) is connected to a plurality of adsorption and decomposition tanks (17) via a plurality of air inlet valves (26); the adsorption and decomposition tanks (17) are connected to a plurality of grid brackets (19) equidistantly distributed from top to bottom; the grid brackets The top of the adsorbent (21) is connected to the top of the adsorbent (19), the adsorbent (25) is connected inside the adsorbent-decomposition tank (17), the adsorbent-decomposition tank (17) is connected outside the adsorbent-decomposition tank (17) to a blower (24) corresponding to the heater (25), the top of the adsorbent-decomposition tank (17) is connected to the catalytic combustion chamber (15) through an output valve (22), the top of the adsorbent-decomposition tank (17) is connected to the transition pipe (5) through a reflux valve (23), and the induced draft fan (4), condenser (6), liquid collecting valve (9), liquid level sensor (11), drain valve (12), catalytic combustion chamber (15), output valve (22), reflux valve (23), blower (24), heater (25), and air intake valve (26) are respectively connected to the controller (16).

2. The VOC recovery and treatment device in the production process of color-coated plates according to claim 1 is characterized in that: A filter screen (2) is connected to the air inlet of the sealing cover (1).

3. The VOC recovery and treatment device in the production process of color-coated plates according to claim 2 is characterized in that: The inner wall of the sealing cover (1) is connected to a plurality of groups of evenly distributed VOC sensors (3), and the VOC sensors (3) are connected to a controller (16).

4. The VOC recovery and treatment device in the production process of color-coated plates according to claim 1 is characterized in that: The cooling liquid pipe (7) is a curved pipe, and the liquid discharge pipe (8) is arranged at the curved point of the cooling liquid pipe (7).

5. The VOC recovery and treatment device in the production process of color-coated plates according to claim 1 is characterized in that: The bottom of the gas distribution pipe (13) is connected with a support rod (14).

6. The VOC recovery and treatment device in the color-coated plate production process according to claim 1 is characterized in that: The controller (16) comprises a control cabinet (161), a cabinet door (164) is hinged at the opening of the control cabinet (161), a power module (162) and a PLC controller (163) are connected inside the control cabinet (161), a touch screen (165) is embedded in the cabinet door (164), the induced draft fan (4), the condenser (6), the liquid collecting valve (9), the liquid drain valve (12), the catalytic combustion chamber (15), the output valve (22), the reflux valve (23), the blower (24), the heater (25), The air intake valve (26), the PLC controller (163), and the touch screen (165) are respectively connected to the power module (162), the power module (162) is connected to an external power supply, and the induced draft fan (4), the condenser (6), the liquid collecting valve (9), the liquid level sensor (11), the drain valve (12), the catalytic combustion chamber (15), the output valve (22), the reflux valve (23), the blower (24), the heater (25), the air intake valve (26), and the touch screen (165) are respectively connected to the PLC controller (163).

7. The VOC recovery and treatment device in the production process of color-coated plates according to claim 1 is characterized in that: The grid support (19) is made of stainless steel.

8. The VOC recovery and treatment device in the production process of color-coated plates according to claim 7 is characterized in that: The grid support (19) is connected to the interior of the adsorption-decomposition tank (17) via a slide rail (18), and one side of the grid support (19) is connected to an inlaid sealing plate (20) inlaid with the side wall of the adsorption-decomposition tank (17).

9. The VOC recovery and treatment device in the production process of color-coated plates according to claim 1 is characterized in that: The adsorbent (21) is an activated carbon fiber product.

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