Automatic control treatment method for waste gas of coating equipment

Abstract

The invention belongs to the field of waste gas treatment, and particularly discloses an automatic waste gas control treatment method for coating equipment, which comprises the following steps: acquiring the real-time flow of waste gas generated by the coating equipment, and introducing the waste gas into a rotational flow plate tower spraying device when the real-time flow of the waste gas reaches a pre-starting flow value; starting a circulating spraying pump in a spraying device of the rotational flow plate tower so as to uniformly spray and purify the waste gas; the cyclone plate is controlled to separate out preliminarily purified waste gas, and the preliminarily purified waste gas is conveyed into an activated carbon adsorption concentration device to be subjected to adsorption treatment; when the adsorption treatment meets a desorption condition, controlling a desorption fan to start so as to heat and desorb the organic waste gas adsorbed by the activated carbon adsorption concentration device; the desorbed organic waste gas is input into a catalytic combustion carbon dioxide device to be preheated and catalyzed to obtain purified waste gas, and the purified waste gas and the organic waste gas to be subjected to catalytic treatment are subjected to heat exchange in the catalytic combustion carbon dioxide device and then discharged. Full-automatic efficient purification treatment of the waste gas of the coating equipment can be achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of waste gas treatment, and more specifically, relates to a method for automatically controlling and treating waste gas from a coating equipment. Background Art

[0002] In the coating industry, waste gas emissions are an important environmental issue that needs to be addressed urgently. The coating process produces a large amount of waste gas containing pollutants such as volatile organic compounds, acidic gases, alkaline gases, and dust particles.

[0003] Traditional waste gas treatment methods often have many limitations. Although some simple filtering devices can remove some dust, they are not very effective in treating organic pollutants; and if some adsorption devices cannot be regenerated in time after adsorption saturation, not only will the treatment efficiency drop significantly, but it will also cause secondary pollution. In addition, the existing waste gas treatment equipment is generally low in automation, and most of them rely on manual operation and experience judgment, making it difficult to achieve accurate and efficient treatment processes. It is impossible to dynamically adjust the treatment parameters according to the real-time composition and flow of the waste gas, resulting in energy waste and unstable treatment effects.

[0004] With the demand for sustainable development, there is an urgent need for an automatic control method for waste gas treatment equipment that can comprehensively and efficiently treat waste gas from coating equipment, has a high degree of automation, and operates stably and reliably to meet the environmental protection needs of the coating industry and reduce the environmental risks of enterprises. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of this application is to provide an automatic control and treatment method for exhaust gas from coating equipment, aiming to solve the problem that the exhaust gas treatment method of coating equipment is poor in effect and relies on manual operation and experience judgment, which makes it difficult to adjust the exhaust gas treatment process according to the real-time composition and dynamic flow rate of the exhaust gas, thereby leading to energy waste and unstable treatment effect.

[0006] To achieve the above objectives, in a first aspect, the present application provides a method for automatically controlling and treating exhaust gas of a coating equipment, comprising: S1 obtains the real-time flow rate of the exhaust gas generated by the coating equipment, and when the real-time flow rate of the exhaust gas reaches the pre-start flow rate value, introduces the exhaust gas into the cyclone plate tower spray device; S2: turning on the circulating spray pump in the cyclone plate tower spray device to evenly spray and purify the waste gas; controlling the cyclone plate to separate the preliminary purified waste gas, and transporting the preliminary purified waste gas to the activated carbon adsorption concentration device for adsorption treatment; S3 determines whether the adsorption treatment meets the desorption conditions: if not, continue the adsorption; if yes, control the desorption fan to start, so as to heat and desorb the organic waste gas adsorbed by the activated carbon adsorption concentration device; and input the desorbed organic waste gas into the catalytic combustion carbon dioxide device for preheating and catalysis to obtain purified waste gas, and discharge the purified waste gas after heat exchange with the organic waste gas to be catalytically treated in the catalytic combustion carbon dioxide device.

[0007] The automatic control and treatment method for waste gas of coating equipment provided in the present application does not require manual experience. Through fully automatic data monitoring and feedback control, each treatment step is closely integrated to form a complete and efficient waste gas treatment process. It can achieve efficient purification treatment of waste gas from coating equipment and meet environmental emission standards. At the same time, it reduces equipment operation and maintenance costs and improves the intelligent management level and overall reliability of the equipment.

[0008] Furthermore, during the adsorption treatment in step S2, the real-time temperature and real-time pressure in the activated carbon adsorption concentrator are monitored. When the real-time temperature exceeds the preset temperature, and / or the real-time pressure exceeds the preset pressure: an alarm is activated, and a cooling device is turned on for cooling, and / or the air intake volume of the activated carbon adsorption concentrator and the amount of circulating gas therein are automatically adjusted.

[0009] Furthermore, the temperature of the cooling medium in the cooling device is 5°C to 25°C, and the flow rate of the cooling medium is automatically adjusted according to the temperature increase in the activated carbon adsorption concentration device.

[0010] Furthermore, the preset temperature is 30°C~50°C, and the preset pressure is 8KPa~12KPa.

[0011] Furthermore, in step S2, before the preliminarily purified waste gas is transported to the activated carbon adsorption concentration device for adsorption treatment, the preliminarily purified waste gas is firstly allowed to enter the dry filter box and filter material in sequence for multiple filtration treatments.

[0012] Furthermore, the filter material is a multi-layer composite structure, and the multi-layer composite structure at least includes a primary filter layer, a secondary filter layer and a high-efficiency filter layer.

[0013] Furthermore, in step S3, the desorption conditions are as follows: monitoring the concentration of organic pollutants in the preliminary purified exhaust gas adsorbed in the activated carbon bed in the activated carbon adsorption concentration device; when the concentration of organic pollutants reaches a desorption threshold, introducing hot air into the activated carbon bed for desorption and regeneration, and inputting the desorbed organic exhaust gas into a catalytic combustion carbon dioxide device for catalytic treatment.

[0014] Furthermore, in step S3, after heating and desorption, 20% to 50% of the desorbed organic waste gas is returned to the air inlet end of the activated carbon adsorption concentration device, and the remaining organic waste gas is input into the catalytic combustion carbon dioxide device for catalytic treatment.

[0015] Furthermore, in step S3, the flow rate of the refluxed organic waste gas is automatically controlled by an electric regulating valve provided on the refluxed gas flow path, and the flow rate of the refluxed gas is calculated by the following formula:

[0016] Wherein, R is the flow rate of the reflux gas, k is the correction coefficient, C1 is the concentration of organic pollutants in the initially purified exhaust gas, and C2 is the concentration of organic pollutants in the purified exhaust gas after treatment.

[0017] Furthermore, in step S3, a precious metal catalyst is used in the catalytic combustion carbon dioxide device to catalytically treat the organic waste gas, and the carrier of the precious metal catalyst is a honeycomb ceramic; and / or, in step S2, real-time data on the change in adsorption efficiency of the activated carbon adsorption bed over time is also obtained, and when the adsorption efficiency continues to decrease within a preset time and deviates from the normal attenuation range, an alarm is activated.

[0018] Furthermore, the controller also acquires and stores the exhaust gas treatment working parameters in steps S1-S3 in real time and analyzes them to predict failures in the exhaust gas treatment process in advance.

[0019] In the second aspect, the present application provides an automatic control and treatment system for exhaust gas of a coating equipment, the automatic control and treatment system comprising a controller, and a monitoring unit, a cyclone plate tower spray device, an activated carbon adsorption and concentration device, a desorption fan and a catalytic combustion carbon dioxide device respectively connected to the controller, wherein the coating equipment, the cyclone plate tower spray device, the activated carbon adsorption and concentration device and the catalytic combustion carbon dioxide device are connected in sequence through a gas pipeline, the desorption fan is arranged in the activated carbon adsorption and concentration device, and the monitoring unit is arranged at the exhaust gas outlet of the coating equipment.

[0020] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0021] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the prior art: (1) The waste gas treatment method provided in this application forms a complete and efficient waste gas treatment process through close cooperation of various steps. Starting from the monitoring and transportation of the waste gas source, the waste gas is processed in sequence through multiple steps of spray purification, adsorption concentration, desorption regeneration, catalytic purification and heat recovery according to the real-time concentration of the waste gas; at the same time, the real-time temperature and real-time pressure in the activated carbon adsorption concentration device during adsorption treatment are monitored in real time, and when the real-time temperature and real-time pressure reach the preset conditions, the alarm is activated and the cooling device is turned on for cooling, and the waste gas intake volume and the circulating gas volume inside the activated carbon adsorption concentration device are automatically adjusted to achieve safe control of the equipment, ensure smooth and safe waste gas treatment process, and closely link each link to ensure efficient waste gas treatment.

[0022] (2) The waste gas treatment method provided in the present application adds a multiple filtration step between the spray purification and adsorption concentration steps, so that most of the large particle impurities in the waste gas are filtered out after multiple filtrations, thereby extending the service life of the activated carbon bed in the activated carbon adsorption concentration device and increasing the adsorption efficiency.

[0023] (3) This application realizes fully automatic intelligent management of the exhaust gas treatment process through data transmission and feedback between the controller and each monitoring unit and the exhaust gas treatment device, and through real-time analysis of the exhaust gas treatment operating parameters. It can achieve efficient exhaust gas treatment without relying on manual experience, avoid various faults that are prone to occur when manual experience is used to treat exhaust gas, and has higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the process flow of the automatic control treatment method of the exhaust gas of the coating equipment provided in the embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the exhaust gas automatic control and treatment system provided in the embodiment of the present application; Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] The term "and / or" in this article is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol " / " in this article indicates that the associated objects are in an or relationship, for example, A / B means A or B.

[0027] The terms "first" and "second" in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of the objects. For example, a first response message and a second response message are used to distinguish different response messages rather than to describe a specific order of the response messages.

[0028] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0029] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc.; multiple elements refer to two or more elements, etc.

[0030] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0031] The present application embodiment provides a method for automatically controlling and treating waste gas of a coating equipment, such as Figure 1 As shown, the control processing method includes: S1 obtains the real-time flow rate of the exhaust gas generated by the coating equipment monitored by the monitoring unit, and when the real-time flow rate of the exhaust gas reaches the pre-start flow rate value, introduces the exhaust gas into the cyclone plate tower spray device; S2 turns on the circulating spray pump in the cyclone plate tower spray device to evenly spray and purify the waste gas for a period of time; controls the cyclone plate to separate the preliminary purified waste gas, and transports the preliminary purified waste gas to the activated carbon adsorption concentration device for adsorption treatment; S3 determines whether the adsorption treatment meets the desorption conditions. If not, the adsorption continues. If so, the desorption fan is controlled to start to heat and desorb the organic waste gas adsorbed by the activated carbon adsorption concentration device; the desorbed organic waste gas is input into the catalytic combustion carbon dioxide device for preheating and catalysis to obtain purified waste gas; the purified waste gas and the organic waste gas to be catalytically treated are heat exchanged in the catalytic combustion carbon dioxide device and then discharged.

[0032] Specifically, in step S1, a flow sensor is provided in the exhaust gas outlet of the coating equipment to detect the exhaust gas flow in real time and transmit the detection data to the controller. The measurement principle of the flow sensor is differential pressure measurement, and the exhaust gas flow is calculated by the conversion formula of differential pressure and flow. The conversion formula of differential pressure and flow is: According to Bernoulli's equation: (1) In a flat pipe (h1=h2), we can get: (2) Where P1-P2 is the differential pressure ∆P; From the fluid continuity equation: , where A is the cross-sectional area of ​​the pipe. Assuming that the pipes are of equal diameter, that is, A1=A2, then v1=v2. However, in actual flow measurement, a throttling device (such as an orifice plate, etc.) is usually set in the pipe to change the flow velocity after the fluid flows through the throttling device. Assuming that the cross-sectional areas of the pipes before and after the throttling device are A1 and A2 respectively, where A2<A1, then ; Substituting the above V2 into ∆P, we can obtain: (3) Where Q is the volume flow rate, C is the outflow coefficient (related to the structure and size of the throttling device, which needs to be determined by the specific device used), ε is the expansibility coefficient (ε=1 for incompressible fluids), A2 is the cross-sectional area of ​​the pipe on the downstream side of the throttling device, and ρ is the fluid density. When Q reaches the preset pre-start flow value, it indicates that a large amount of waste gas urgently needs to be purified. At this time, the controller controls the corresponding valve on the gas pipeline between the coating equipment and the cyclone plate tower spray device to open to input the waste gas into the cyclone plate tower spray device. During the waste gas generation process, the waste gas conveying fan at the air inlet end of the gas pipeline between the coating equipment and the cyclone plate tower spray device is continuously turned on to introduce a steady stream of waste gas into the gas pipeline.

[0033] The aforementioned controller adopts a programmable logic controller, which realizes automatic control of each step and equipment linkage through programming. The operation interface of the programmable logic controller can be a touch screen. The controller can also be equipped with an intelligent algorithm module for real-time collection and in-depth analysis of historical data of each process link of waste gas treatment, so as to predict potential failures of the devices or units used in each waste gas treatment link in advance.

[0034] During the adsorption treatment in the aforementioned step S2, the real-time temperature and real-time pressure in the activated carbon adsorption concentration device are monitored respectively by the temperature sensor and the pressure sensor. When the real-time temperature exceeds the preset temperature, the alarm is activated, and the cooling device is turned on for cooling. The air intake of the activated carbon adsorption concentration device and the amount of circulating gas inside it can also be automatically adjusted at the same time to improve the reliability of fault resolution; when the real-time pressure exceeds the preset pressure, the alarm is activated, and the air intake of the activated carbon adsorption concentration device and the amount of circulating gas inside it are automatically adjusted. The cooling device can also be turned on for cooling at the same time to improve the reliability of fault resolution. When the real-time temperature exceeds the preset temperature and the real-time pressure exceeds the preset pressure, the alarm is activated, and the cooling device is turned on at the same time. The temperature and pressure are adjusted by automatically adjusting the air intake of the activated carbon adsorption concentration device and the amount of circulating gas inside it. This can avoid the problem of missing potential faults in the waste gas treatment process that affects the waste gas treatment process.

[0035] The aforementioned preset temperature is 30℃~50℃, the most preferred temperature is 40℃, and it can also be any temperature value between any two of the above temperature values; the aforementioned preset pressure is 8KPa~12KPa, the most preferred pressure value is 10KPa, and it can also be any pressure value between any two of the above pressure values.

[0036] The cooling medium in the aforementioned cooling device is water, and the water temperature is 5°C~25°C; specifically, the cooling device is a shell and tube heat exchanger, the cooling medium is water, and the water temperature is preferably controlled at 10°C. The PLC programmable logic controller automatically adjusts the cooling water flow rate according to the temperature increase. The temperature sensor and the pressure sensor both use high-precision sensor chips, which have the characteristics of strong anti-interference ability and fast response speed. The controller automatically adjusts the flow rate of the cooling medium according to the temperature increase in the activated carbon adsorption concentration device. For example, when the temperature in the activated carbon adsorption concentration device increases by 5°C, the water flow rate is increased according to the preset flow gradient for cooling. The size of the preset flow gradient depends on the water temperature and the initial temperature difference in the activated carbon adsorption concentration device, that is, for every 5°C increase in temperature in the activated carbon adsorption concentration device, the proportion of the cooling water flow rate that needs to be increased depends on the initial temperature difference. If the initial temperature difference is ΔT1, the flow rate needs to be increased: (4) If the temperature rises by 10°C, the water flow rate needs to increase by 100%.

[0037] In step S2, according to the changes in the exhaust gas flow rate and the concentration of pollutants in the exhaust gas, the spray pump flow rate is controlled by automatically adjusting the frequency of the motor connected to the spray pump. The spray pump nozzle adopts a spiral atomizing nozzle, which has good corrosion resistance and wear resistance, and can achieve uniform spraying, thereby achieving better pre-purification effect.

[0038] In step S2, before the preliminary purified waste gas is transported to the activated carbon adsorption concentration device for adsorption treatment, the preliminary purified waste gas can also be firstly passed into the dry filter box and the filter material for multiple filtration treatments in sequence. That is, a multi-layer filter material is also arranged in the gas channel between the cyclone plate tower spray device and the activated carbon adsorption concentration device. The filter material is a multi-layer composite structure. The multi-layer composite structure includes at least a primary filter layer, a middle filter layer and a high-efficiency filter layer. The filtration accuracy of each layer increases in sequence, which can effectively intercept dust particles and ensure the cleanliness of the air intake of the subsequent treatment unit. For example, the filtration accuracy of the primary filter layer is 18μm, the middle filter layer is 8μm, and the high-efficiency filter layer is not less than 5μm; it can also include a support layer, a waterproof layer and an activated carbon layer. Each filter layer is arranged in order from coarse to fine and integrated into a filter unit to ensure that the waste gas passes through the primary, middle and high-efficiency filter layers in sequence. Each filter layer can also be designed to be replaced separately for easy maintenance and cost control.

[0039] Through the structural design of the above-mentioned multi-layer filter material, the waste gas treatment equipment can efficiently remove particulate matter and pollutants, avoiding the blockage of the activated carbon adsorption concentration device in the subsequent process and reducing its service life. At the same time, pre-filtration can further ensure that the subsequent waste gas meets the emission standards without affecting and reducing the operation and maintenance costs.

[0040] In step S3, the desorption condition is: monitoring the concentration of organic pollutants in the preliminary purified exhaust gas adsorbed in the activated carbon bed in the activated carbon adsorption concentration device, when the concentration of organic pollutants reaches the desorption threshold, turning on the desorption fan to pass hot air into the activated carbon bed for desorption and regeneration, and inputting the desorbed organic exhaust gas into the catalytic combustion carbon dioxide device for catalytic treatment. Specifically, the concentration of organic pollutants in the preliminary purified exhaust gas is monitored by a photoionization detector at the entrance of the activated carbon adsorption concentration device. The photoionization detector mentioned above is a PID photoionization detector commonly used in the prior art, and its monitoring principle is not repeated here. The aforementioned desorption fan is an explosion-proof fan to prevent the explosion of combustible gases that may be generated during the desorption process. Its air volume is twice the air intake volume of the activated carbon adsorption concentration device, and it can achieve efficient desorption. By passing hot air into the adsorption bed (i.e., the activated carbon bed) for desorption and regeneration, the desorbed high-concentration organic exhaust gas is sent to the catalytic combustion carbon dioxide device, and the gas delivery pipeline is wrapped with insulation material, and the insulation material is rock wool.

[0041] After desorption and regeneration, 20% to 50% of the desorbed organic waste gas is refluxed to the air inlet end of the activated carbon adsorption concentration device, and the remaining organic waste gas is input into the catalytic combustion carbon dioxide device for catalytic treatment. The preferred reflux ratio is 40%, which can maintain a stable gas flow rate.

[0042] The activated carbon of the above-mentioned activated carbon adsorption bed is selected as columnar activated carbon, which has a diameter of 3.8mm, a length of 5mm, and a specific surface area of ​​not less than 1000㎡ / g. A reflux gas pipeline is provided at the adsorption front end of the activated carbon adsorption bed, and an electric regulating valve is installed on the reflux gas pipeline. The valve opening is automatically adjusted by the controller according to the exhaust gas concentration and the treatment effect to control the reflux gas ratio to maintain a stable gas flow.

[0043] In step S3, the flow rate of the reflux gas is automatically controlled by an electric regulating valve provided on the reflux gas flow path. The PLC programmable logic controller determines the proportion of the reflux gas through the mass balance adjustment formula and the exhaust gas concentration monitoring data, and adjusts the amount of the reflux gas by controlling the corresponding valve. The flow rate of the reflux gas is calculated by the mass balance adjustment formula: (5) Wherein, R is the flow rate of the reflux gas, k is the correction coefficient, C1 is the concentration of organic pollutants in the initially purified exhaust gas, and C2 is the concentration of organic pollutants in the purified exhaust gas after treatment.

[0044] The catalytic combustion of carbon dioxide device uses precious metal catalysts to catalytically treat organic waste gas, and the carrier of the precious metal catalyst is honeycomb ceramics, and the precious metal loading method of the precious metal catalyst is impregnation. Specifically, the catalytic combustion of carbon dioxide device also uses electric heating tubes for heating. The electric heating tubes are made of stainless steel 304, and their surface load is not higher than 5W / cm². The pore density of the honeycomb ceramics is 360holes / in², and the precious metal loading method of the precious metal catalyst is impregnation. The above design can ensure that the active ingredients are evenly distributed.

[0045] In the aforementioned step S2, the controller also obtains the data of the adsorption efficiency of the activated carbon adsorption bed changing with time in real time, and activates the alarm when the adsorption efficiency continues to decrease within a preset time and deviates from the normal attenuation range.

[0046] Specifically, the controller also acquires and stores the exhaust gas treatment working parameters in steps S1-S3 in real time and analyzes them to predict failures in the exhaust gas treatment process in advance. The exhaust gas treatment working parameters include exhaust gas flow change value, temperature change value, pressure change value, organic pollutant concentration value, adsorption efficiency, power consumption change, activity attenuation of precious metal catalysts, heat exchange efficiency change parameters of heat exchangers, etc.

[0047] For example, the PLC programmable logic controller continuously collects monitoring data from flow sensors, temperature sensors, pressure sensors, concentration monitors and other monitoring units during long-term exhaust gas treatment processes, including exhaust gas flow change trends, temperature and pressure fluctuations in each treatment stage, and organic pollutant concentration change patterns. These data are stored in the PLC database.

[0048] The intelligent algorithm module on the PLC programmable logic controller will regularly mine and analyze these data. For example, by analyzing the curve of the adsorption efficiency of the activated carbon adsorption bed over time, if it is found that the adsorption efficiency continues to decline over a period of time and deviates from the normal attenuation range, combined with the exhaust gas flow and pollutant concentration data, it may indicate that the activated carbon is about to reach adsorption saturation or partial deactivation. At this time, the PLC will issue an early warning signal to prompt timely preparation for activated carbon replacement or regeneration, rather than waiting until the concentration of organic pollutants at the outlet of the activated carbon adsorption concentration device reaches the desorption threshold before processing, thereby effectively avoiding the problem of substandard exhaust gas treatment due to the degradation of activated carbon performance.

[0049] In the case of catalytic combustion of carbon dioxide, the intelligent algorithm module monitors the power consumption changes of the electric heater, the activity decay of the precious metal catalyst (by analyzing the change in the concentration of organic pollutants in the exhaust gas before and after the catalytic reaction), the heat exchange efficiency changes of the heat exchanger, and other parameters. Once the power of the electric heater increases abnormally, the activity of the catalyst decreases too quickly, or the heat exchange efficiency of the heat exchanger decreases, an alarm is issued.

[0050] In summary, the fully automatic exhaust gas control and treatment method provided in this embodiment predicts possible faults in advance by collecting and analyzing the historical operation data of the equipment, and changes the traditional post-maintenance mode to preventive maintenance. For example, timely prompts for activated carbon replacement or regeneration, discovering potential problems of catalytic combustion devices, etc., reduce equipment downtime, improve overall operating efficiency, and reduce maintenance costs and environmental risks.

[0051] During the operation of this embodiment, each step works closely together to form a complete and efficient waste gas treatment process. Starting from the monitoring and transportation of the source of waste gas generation, it goes through spray purification, filtration and dust removal, adsorption concentration, safety regulation, desorption regeneration, catalytic combustion purification and heat recovery in turn. The output of each link is used as the input of the next link, and they are linked together to ensure that the waste gas is effectively treated. Intelligent fault prediction and maintenance steps run through the entire process, monitoring the operating status of the equipment in real time to ensure the stable operation of each link. Ultimately, efficient purification and treatment of waste gas from coating equipment is achieved to meet environmental emission standards, while reducing equipment operation and maintenance costs, improving the intelligent management level and overall reliability of the equipment, extending the service life of the equipment, and providing stable environmental support for coating production.

[0052] In another embodiment, an automatic control and treatment system for waste gas of a coating equipment is also provided. Figure 2As shown, the automatic control processing system includes a controller, and a monitoring unit, a cyclone plate tower spray device, an activated carbon adsorption and concentration device, a desorption fan and a catalytic combustion carbon dioxide device respectively connected to the controller, wherein the coating equipment, the cyclone plate tower spray device, the activated carbon adsorption and concentration device and the catalytic combustion carbon dioxide device are connected in sequence through a gas pipeline, the desorption fan is arranged in the activated carbon adsorption and concentration device, and the monitoring unit is arranged at the exhaust gas outlet of the coating equipment.

[0053] It can be understood that the detailed functional implementation of each of the above-mentioned units / modules can be found in the introduction of the aforementioned method embodiment, and will not be repeated here.

[0054] It should be understood that the above-mentioned device is used to execute the method in the above-mentioned embodiment. The implementation principle and technical effect of the corresponding program module in the device are similar to those described in the above-mentioned method. The working process of the device can refer to the corresponding process in the above-mentioned method, which will not be repeated here.

[0055] Based on the method in the above embodiment, the embodiment of the present application provides an electronic device, such as Figure 3 As shown, the electronic device may include: a processor (Processor) 310, a communication interface (Communications Interface) 320, a memory (Memory) 330 and a communication bus 340, wherein the processor 310, the communication interface 320, and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the method in the above embodiment.

[0056] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0057] Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method in the above embodiment.

[0058] Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method in the above embodiment.

[0059] It is understandable that the processor in the embodiment of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0060] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

[0061] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

[0062] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0063] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for automatically controlling and treating waste gas from a coating equipment, characterized in that: include: S1 obtains the real-time flow rate of the exhaust gas generated by the coating equipment, and when the real-time flow rate of the exhaust gas reaches the pre-start flow rate value, introduces the exhaust gas into the cyclone plate tower spray device; S2 turns on the circulating spray pump in the cyclone plate tower spray device to evenly spray and purify the waste gas; controls the cyclone plate to separate the preliminary purified waste gas, and transports the preliminary purified waste gas to the activated carbon adsorption concentration device for adsorption treatment; S3 determines whether the adsorption treatment meets the desorption conditions: if not, continue the adsorption; if yes, control the desorption fan to start, so as to heat and desorb the organic waste gas adsorbed by the activated carbon adsorption concentration device; and input the desorbed organic waste gas into the catalytic combustion carbon dioxide device for preheating and catalysis to obtain purified waste gas, and discharge the purified waste gas after heat exchange with the organic waste gas to be catalytically treated in the catalytic combustion carbon dioxide device.

2. The method for automatically controlling and treating waste gas of a coating equipment according to claim 1, characterized in that: During the adsorption treatment in step S2, the real-time temperature and real-time pressure in the activated carbon adsorption concentrator are monitored. When the real-time temperature exceeds the preset temperature, and / or the real-time pressure exceeds the preset pressure: an alarm is activated, and a cooling device is turned on for cooling, and / or the air intake volume of the activated carbon adsorption concentrator and the amount of circulating gas therein are automatically adjusted.

3. The method for automatically controlling and treating waste gas of a coating equipment according to claim 2, characterized in that: The temperature of the cooling medium in the cooling device is 5°C to 25°C, and the flow rate of the cooling medium is automatically adjusted according to the temperature increase in the activated carbon adsorption concentration device.

4. The method for automatically controlling and treating waste gas of a coating equipment according to claim 2, characterized in that: The preset temperature is 30°C to 50°C, and the preset pressure is 8KPa to 12KPa.

5. The method for automatically controlling and treating waste gas of a coating equipment according to claim 1, characterized in that: In step S2, before the preliminarily purified waste gas is transported to the activated carbon adsorption concentration device for adsorption treatment, the preliminarily purified waste gas is firstly passed into the dry filter box and filter material in sequence for multiple filtration treatments.

6. The method for automatically controlling and treating waste gas of a coating equipment according to claim 5, characterized in that: The filter material is a multi-layer composite structure, which at least includes a primary filter layer, a secondary filter layer and a high-efficiency filter layer.

7. The method for automatically controlling and treating waste gas of a coating equipment according to claim 1, characterized in that: In step S3, the desorption condition is: the concentration of organic pollutants in the initially purified exhaust gas adsorbed in the activated carbon bed in the activated carbon adsorption concentration device reaches a desorption threshold.

8. The method for automatically controlling and treating waste gas of a coating equipment according to claim 7, characterized in that: In step S3, after heating and desorption, 20% to 50% of the desorbed organic waste gas is refluxed to the air inlet end of the activated carbon adsorption concentration device, and the remaining organic waste gas is input into the catalytic combustion carbon dioxide device for catalytic treatment.

9. The method for automatically controlling and treating waste gas of a coating equipment according to claim 8, characterized in that: In step S3, the flow rate of the refluxed organic waste gas is automatically controlled by an electric regulating valve provided on the reflux gas flow path, and the flow rate of the refluxed gas is calculated by the following formula: Wherein, R is the flow rate of the reflux gas, k is the correction coefficient, C1 is the concentration of organic pollutants in the initially purified exhaust gas, and C2 is the concentration of organic pollutants in the purified exhaust gas after treatment.

10. The method for automatically controlling and treating waste gas of a coating equipment according to claim 1, characterized in that: In step S3, the catalytic combustion of carbon dioxide device uses a precious metal catalyst to catalytically treat the organic waste gas, and the carrier of the precious metal catalyst is a honeycomb ceramic; and / or, in step S2, real-time data on the change in adsorption efficiency of the activated carbon adsorption bed over time is also obtained, and when the adsorption efficiency continues to decrease within a preset time and deviates from the normal attenuation range, the alarm is activated.

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