Quality-divided treatment device for plastic extrusion tail gas

Abstract

The invention discloses a quality-divided treatment device for plastic extrusion tail gas, which belongs to the technical field of tail gas treatment, and comprises a collection module, a diversion guide module, a first treatment module, a second treatment module and a control module, the collecting module is used for directionally distributing and collecting tail gas exhausted from the multiple exhaust ports. Waste gas at the corresponding position is collected through the collecting module, the correspondingly collected waste gas is shunted through the shunting guiding module, collected high-concentration tail gas and low-concentration tail gas are subjected to quality-divided shunting, and first tail gas and second tail gas are correspondingly guided into the first treatment module and the second treatment module; the first tail gas is directly subjected to thermal oxidation treatment through the first treatment module to reach the ideal tail gas emission standard, and the second tail gas is subjected to combined treatment through the second treatment module to reach the ideal tail gas emission standard.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, in particular to a device for quality separation treatment of plastic extrusion tail gas. Background Art

[0002] In the production process of modified plastics, especially in the melting and cooling stages of the extruder, a large amount of VOCs will be generated. Although different substrates will produce waste gas with different components during modification, the waste gas generated during production of any substrate plastic is mainly composed of particulate matter, heavy hydrocarbons, total hydrocarbons and other substances. Therefore, it is necessary to adopt scientific VOCs treatment technology in the production link of modified plastics based on the common waste gas components of different types of modified plastics to achieve good treatment effects and further realize energy conservation and emission reduction.

[0003] The basic exhaust gas sources are mainly from the extruder head, extruder exhaust port and vacuum pump exhaust; among them, the VOCs concentration and heavy component content of the vacuum pump exhaust are relatively high, while the pollutant concentrations of the extruder head and extruder exhaust port are relatively low; the existing collection process often collects all organic waste gases and sends them together to the back-end treatment facilities.

[0004] Existing waste gas treatment processes often use a single process. Since the heavy components in the organic waste gas will condense during the transportation process, producing dirty oily substances, which will clog the treatment equipment, causing the treatment equipment to not operate normally or high operation and maintenance costs, and poor use effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a quality control device for plastic extrusion exhaust gas to solve the above-mentioned problem that the heavy components in the organic waste gas will condense during the transportation process, produce dirty oily substances, block the treatment equipment, and cause the treatment equipment to not operate normally or have high operation and maintenance costs.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for separating and treating plastic extrusion tail gas, comprising:

[0008] A collection module, the collection module is arranged at multiple exhaust ports of the plastic extrusion equipment, and the collection module is used for directional diversion and collection of exhaust gas discharged from the multiple exhaust ports;

[0009] A diversion and guidance module, the diversion and guidance module is connected to the collection module, and the diversion and guidance module is used for diversion and guidance of the exhaust gas, wherein the exhaust gas diversion and guidance is a first exhaust gas and a second exhaust gas, and the concentration of the first exhaust gas is greater than that of the second exhaust gas;

[0010] a first processing module, the first processing module being connected to the diversion and guide module, and being used to process the first tail gas;

[0011] a second processing module, the second processing module being connected to the diversion and guide module, and being used to process the second tail gas;

[0012] A control module, the control module includes a detection component and an execution component, the detection component is installed on the second processing module, the execution component is installed in the second processing module, the detection component is used for gas concentration detection, and the execution component is used to control the flow direction of the second exhaust gas in the second processing module so that the second exhaust gas can be combined and processed.

[0013] As a further solution of the present invention: the second processing module includes a wet spray component, a processing component and an interactive component, the processing component includes an activated carbon adsorption component, a biological decomposition component and a photocatalytic oxidation component, the air inlet end of the wet spray component is connected to the diversion guide module, the air outlet end of the wet spray component is connected to the interactive component, the interactive component is respectively connected to the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component, the interactive component, the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component are all connected to the detection component to detect the concentration of the second exhaust gas after treatment, the interactive component is connected to the execution component, and the execution component controls the flow direction of the second exhaust gas so that the second exhaust gas can be interactively circulated between the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component.

[0014] As a further solution of the present invention: the interactive component includes a plurality of interconnected pipes, and the plurality of pipes are respectively connected to the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The pipes are connected with an execution component, and the execution component is used to control the interactive circulation of the second exhaust gas between the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The detection component is installed at the air outlet end of the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The detection component is installed at the air outlet end of the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component, and the air outlet ends are all connected to the air outlet pipe, and the air outlet pipe is connected to the execution component.

[0015] As a further solution of the present invention: the wet spray component includes a shell, a porous spray mechanism and a water supply mechanism, the air inlet end of the shell is connected to the diversion guide module, the porous spray mechanism and the water supply mechanism are installed in the shell, the water supply mechanism is connected to the porous spray mechanism, the water supply mechanism supplies high-pressure fluid and distributes it through the porous spray mechanism, and the fluid is used to perform preliminary purification treatment on the second exhaust gas.

[0016] As a further solution of the present invention: the air inlet opening inside the shell is increased, the multi-hole spray mechanism is provided with multiple groups of spray ports, the multiple groups of spray ports are all inclined, and the multiple groups of spray ports are all facing the air inlet end of the shell.

[0017] As a further solution of the present invention: the multiple groups of spray ports arranged at the air inlet end of the shell along the air outlet end have increasing angles with the horizontal plane, and the multiple groups of spray ports are equidistantly distributed in the shell.

[0018] As a further solution of the present invention: the detection component includes at least one of a gas detector, a gas sensor module and a gas analyzer, and the execution component includes a solenoid valve or an electric valve.

[0019] As a further solution of the present invention: the collection module includes multiple gas collecting plates, and the multiple gas collecting plates are placed correspondingly at multiple exhaust ports of the plastic extrusion equipment, and the multiple gas collecting plates are used for directional diversion and collection of exhaust gas discharged from the multiple exhaust ports.

[0020] As a further solution of the present invention: the diversion and guiding module includes multiple branch pipes and a main pipe connecting the multiple branch pipes, the gas collecting plate is connected to the branch pipes, the first processing module and the shell air inlet end are correspondingly connected to the main pipe, and the main pipe diverts and guides the exhaust gas into a first exhaust gas and a second exhaust gas, wherein the first exhaust gas is introduced into the first processing module, and the second exhaust gas is introduced into the shell air inlet end.

[0021] As a further solution of the present invention: the first processing module includes a thermal oxidation shell and a combustion component, the combustion component is installed in the thermal oxidation shell, the air inlet end of the thermal oxidation shell is connected to the main pipe, and the combustion component is used for thermal oxidation treatment of the first tail gas.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the waste gas at the corresponding location is collected by the collection module, and the corresponding collected waste gas is diverted by the diversion guide module, so that the collected high-concentration tail gas and low-concentration tail gas are separated and diverted to obtain a high-concentration first tail gas and a low-concentration second tail gas. The first tail gas and the second tail gas are introduced into the first processing module and the second processing module respectively, and the first tail gas is directly thermally oxidized by the first processing module to achieve the ideal tail gas emission standard. In order to avoid incomplete combustion of the low-concentration second tail gas due to low organic content, the second tail gas is combined and treated by the second processing module to allow the second tail gas to also achieve the ideal tail gas emission standard, avoid equipment blockage caused by the traditional centralized and unified waste gas treatment method, and perform quality-based treatment on the tail gas to ensure the normal and stable operation of the equipment, and the tail gas treatment effect is good.

[0024] 2. In the present invention, the second exhaust gas treated by wet spraying enters the interactive component, which serves as the control center of the second exhaust gas flow direction. According to the current concentration of the second exhaust gas after the preliminary treatment by the wet spray component, the executive component controls the opening and closing, and then intelligently adjusts the second exhaust gas to flow to the activated carbon adsorption component, the biological decomposition component or the photocatalytic oxidation component respectively for single-process treatment. When the single treatment process in the treatment component cannot meet the second exhaust gas emission standard, the interactive component accurately controls the flow direction of the exhaust gas so that the exhaust gas can circulate multiple times between the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component to ensure that the pollutants in the exhaust gas are fully treated, and the second exhaust gas is subjected to a variety of combined process treatments to meet the emission standards. It is suitable for a variety of low-concentration exhaust gas treatments, and the combined treatment methods are diverse to ensure treatment efficiency and good second exhaust gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the axial side three-dimensional structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the connection of the porous spray mechanism of the present invention.

[0029] In the figure: 1. Collection module; 11. Gas collecting plate; 2. Diversion guide module; 21. Branch pipe; 22. Main pipe; 3. First treatment module; 31. Thermal oxidation shell; 32. Combustion component; 4. Second treatment module; 41. Wet spray component; 411. Shell; 412. Multi-porous spray mechanism; 413. Water supply mechanism; 42. Activated carbon adsorption component; 43. Biodegradation component; 44. Photocatalytic oxidation component; 45. Interaction component; 451. Pipeline; 5. Control module; 51. Detection component; 52. Execution component. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0031] Example:

[0032] See also Figures 1-4In an embodiment of the present invention, a device for fractionating and treating plastic extrusion exhaust gas includes a collection module 1, a diversion guide module 2, a first processing module 3, a second processing module 4 and a control module 5: the collection module 1 is arranged at multiple exhaust ports of the plastic extrusion equipment, and the collection module 1 is used for directional diversion and collection of exhaust gas discharged from multiple exhaust ports; the diversion guide module 2 is connected to the collection module 1, and the diversion guide module 2 is used for diversion and guidance of the exhaust gas, wherein the exhaust gas diversion and guidance are the first exhaust gas and the second exhaust gas, and the concentration of the first exhaust gas is greater than the concentration of the second exhaust gas; the first processing module 3 is connected to the diversion guide module 2, and the first processing module 3 is used to treat the first exhaust gas; the second processing module 4 is connected to the diversion guide module 2, and the second processing module 4 is used to treat the second exhaust gas; the control module 5 includes a detection component 51 and an execution component 52, the detection component 51 is installed on the second processing module 4, and the execution component 52 is installed in the second processing module 4, the detection component 51 is used for gas concentration detection, and the execution component 52 is used to control the flow direction of the second exhaust gas in the second processing module 4, so that the second exhaust gas is combined and treated.

[0033] In the plastic extrusion process, an extruder is used for extrusion, and the basic exhaust gas sources are mainly the extruder head, the extruder exhaust port and the vacuum pump exhaust; among them, the VOCs concentration and the content of heavy components in the exhaust gas from the vacuum pump exhaust are relatively high, and the VOCs concentration and the content of heavy components in the exhaust gas from the extruder head and the extruder exhaust port are relatively low.

[0034] Specifically, in the present invention, the collecting module 1 is placed at the vacuum pump exhaust port of the extruder, the extruder head and the extruder exhaust port, and the corresponding exhaust gas is collected by the collecting module 1. The corresponding collected exhaust gas is diverted by the diversion guide module 2, so that the collected high-concentration exhaust gas and low-concentration exhaust gas are separated by quality to obtain a high-concentration first exhaust gas and a low-concentration second exhaust gas. The first exhaust gas and the second exhaust gas are introduced into the first processing module 3 and the second processing module 4 respectively, and the first exhaust gas is directly thermally oxidized by the first processing module 3 to achieve the ideal exhaust gas emission standard. In order to avoid incomplete combustion of the low-concentration second exhaust gas due to the low organic content, the second exhaust gas is combined and treated by the second processing module 4, so that the second exhaust gas also reaches the ideal exhaust gas emission standard, avoids equipment blockage caused by the traditional centralized and unified exhaust gas treatment method, and performs quality-based treatment on the exhaust gas to ensure the normal and stable operation of the equipment, and the exhaust gas treatment effect is good.

[0035] At the same time, the control module 5 is connected to the second processing module 4. The detection component 51 in the control module 5 is used to detect the concentration of the treated second exhaust gas in the second processing module 4. The execution component 52 controls the flow direction of the second exhaust gas at different positions in the second processing module 4 according to the detection concentration of the treated second exhaust gas, and then controls the second exhaust gas to be distributed in the second processing module 4 multiple times, so that the low-concentration second exhaust gas can undergo multi-process treatment to achieve the ideal exhaust emission standard, the exhaust gas treatment is thorough, and the use effect is good.

[0036] Preferably, Figure 2-Figure 4 As shown, the second treatment module 4 includes a wet spray component 41, a treatment component and an interactive component 45. The treatment component includes an activated carbon adsorption component 42, a biological decomposition component 43 and a photocatalytic oxidation component 44. The air inlet end of the wet spray component 41 is connected to the diversion guide module 2, and the air outlet end of the wet spray component 41 is connected to the interactive component 45. The interactive component 45 is respectively connected to the activated carbon adsorption component 42, the biological decomposition component 43 and the photocatalytic oxidation component 44. The interactive component 45, the activated carbon adsorption component 42, the biological decomposition component 43 and the photocatalytic oxidation component 44 are all connected to the detection component 51 to detect the concentration of the second exhaust gas after treatment. The interactive component 45 is connected to the execution component 52. The execution component 52 controls the flow direction of the second exhaust gas so that the second exhaust gas can be circulated interactively between the activated carbon adsorption component 42, the biological decomposition component 43 and the photocatalytic oxidation component 44.

[0037] Specifically, after the second exhaust gas is introduced into the second processing module 4, it is pre-treated by the wet spray component 41. First, the second exhaust gas is preliminarily purified. Some particulate matter and soluble pollutants in the exhaust gas are removed by spraying, and the heavy components in the second exhaust gas are removed, thereby reducing the burden on subsequent processing components, thereby avoiding clogging of the subsequent activated carbon adsorption component 42, the biological decomposition component 43 and the photocatalytic oxidation component 44. Subsequently, the second exhaust gas treated by wet spraying enters the interactive component 45. The interactive component 45 serves as the control center of the second exhaust gas flow direction. According to the current concentration of the second exhaust gas after the preliminary treatment by the wet spray component 41, the executive component 52 is controlled to open and close. Then, the second tail gas is intelligently adjusted to flow to the activated carbon adsorption component 42, the biodegradation component 43 or the photocatalytic oxidation component 44 respectively for single process treatment. When the single treatment process in the treatment component cannot meet the second tail gas emission standard, the interactive component 45 accurately controls the flow direction of the tail gas so that the tail gas can circulate multiple times between the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44, ensuring that the pollutants in the tail gas are fully treated, allowing the second tail gas to undergo multiple combined process treatments to meet the emission standards. It is applicable to a variety of low-concentration tail gas treatments, with diverse combined treatment methods to ensure treatment efficiency and good second tail gas treatment effect.

[0038] Furthermore, the treatment components include not only activated carbon adsorption components 42, biological decomposition components 43 and photocatalytic oxidation components 44, but can also include quasi-molecular photolysis components, adsorption and desorption components and other VOCs or odor treatment components and other gas treatments. Multiple treatment components can be replaced or added to each other, and the added treatment components are adaptively connected through interactive components 45. When a single treatment process in the treatment component cannot meet the second exhaust gas emission standard, the interactive component 45 can accurately control the flow direction of the exhaust gas, and the second exhaust gas can achieve two or more combined treatment methods, which has a wide range of applications and good treatment effect on the second exhaust gas.

[0039] Among them, the activated carbon adsorption component 42 uses the adsorption properties of activated carbon to further remove organic pollutants in the exhaust gas, especially for certain pollutants that are difficult to treat by other means, the activated carbon adsorption performance is excellent; the biological decomposition component 43 decomposes the organic matter in the exhaust gas into harmless substances through the metabolism of microorganisms. This treatment method is environmentally friendly and efficient; the photocatalytic oxidation component 44 uses the strong oxidizing properties generated by the photocatalyst under light conditions to oxidize and decompose the pollutants in the exhaust gas, thereby achieving the purpose of purifying the exhaust gas.

[0040] Preferably, Figure 1-Figure 3 As shown, the interactive component 45 includes a plurality of interconnected pipes 451, which are respectively connected to the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44. The pipes 451 are connected to the execution component 52, and the execution component 52 is used to control the interactive flow of the second exhaust gas between the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44. The detection component 51 is installed at the gas outlet ends of the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44. The detection component 51 is installed at the gas outlet ends of the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44, and the gas outlet ends of the activated carbon adsorption component 42, the biodegradation component 43 and the photocatalytic oxidation component 44 are all connected to the gas outlet pipe, and the gas outlet pipe is connected to the execution component 52.

[0041] Specifically, an actuator 52 is connected to a plurality of interconnected pipes 451 and an outlet pipe. The actuator 52 on the pipe 451 is used to control the flow direction of the second exhaust gas. The actuator 52 on the outlet pipe is adaptively opened and closed according to the emission requirements of the second exhaust gas. The combined activated carbon adsorption component 42, the biodegradation component 43 or the photocatalytic oxidation component 44 is adapted to different second exhaust gas treatments. According to the different requirements of the second exhaust gas, the first treatment equipment is adaptively selected. After passing through the activated carbon adsorption component 42, the biodegradation component 43 or the photocatalytic oxidation component 4 4 After the second exhaust gas after the preliminary treatment is treated for the first time, the concentration is detected by the detection component 51 at the corresponding outlet end. After the emission standard is met, the treated second exhaust gas is discharged. When the second exhaust gas after the first treatment by the activated carbon adsorption component 42, the biological decomposition component 43 or the photocatalytic oxidation component 44 does not meet the emission standard, the second exhaust gas is allowed to circulate alternately in the activated carbon adsorption component 42, the biological decomposition component 43 or the photocatalytic oxidation component 44 through the execution component 52 until the emission standard is met, and the second exhaust gas is discharged, and the exhaust treatment effect is good.

[0042] Preferably, Figure 2-Figure 4 As shown, the wet spray component 41 includes a shell 411, a porous spray mechanism 412 and a water supply mechanism 413. The air inlet end of the shell 411 is connected to the diversion guide module 2. The porous spray mechanism 412 and the water supply mechanism 413 are installed in the shell 411. The water supply mechanism 413 is connected to the porous spray mechanism 412. The water supply mechanism 413 supplies high-pressure fluid and distributes it through the porous spray mechanism 412. The fluid is used to perform preliminary purification treatment on the second exhaust gas.

[0043] Specifically, the porous spray mechanism 412 includes multiple spray heads, which are evenly distributed in the shell 411 to ensure that the fluid can fully cover the second exhaust gas and improve the purification efficiency. The water supply mechanism 413 uses a high-precision water pump, which can stably provide the required high-pressure fluid to ensure the spraying effect. After the fluid passes through the porous spray mechanism 412, it forms a fine water mist, which is in full contact with the second exhaust gas, effectively removing the heavy components in the exhaust gas to avoid clogging the activated carbon adsorption component 42, the biological decomposition component 43 and the photocatalytic oxidation component 44.

[0044] Preferably, Figure 4 As shown, the openings of the air inlet end inside the shell 411 increase gradually, and the porous spray mechanism 412 is provided with multiple groups of spray ports, which are all inclined and face the air inlet end of the shell 411.

[0045] Specifically, the multiple groups of spray nozzles are tilted so that the fluid forms a certain angle when it is sprayed. This not only increases the contact area between the fluid and the second exhaust gas, but also encourages the fluid to form vortices within the housing 411, further enhancing the mixing effect of the exhaust gas and the fluid. The tilted spray nozzles also guide the exhaust gas along the internal wall of the housing 411, reducing dead angles within the housing 411 and ensuring that pollutants in the exhaust gas are fully purified. The multiple groups of spray nozzles can flexibly adjust the spray intensity according to the exhaust gas flow rate and pollution level, achieving more precise purification.

[0046] Preferably, Figure 4 As shown, the multiple groups of spray ports arranged along the air outlet end of the shell 411 have increasing angles with the horizontal plane, and the multiple groups of spray ports are evenly distributed in the shell 411.

[0047] Specifically, the increasing angles between the multiple groups of spray nozzles and the horizontal plane enable the fluid to form a progressive spray effect from low to high when spraying. The setting of increasing angles not only optimizes the distribution of the fluid inside the shell 411, but also enhances the impact of the fluid on the exhaust gas, further improving the mixing uniformity of the exhaust gas and the fluid. The multiple groups of spray nozzles distributed at equal intervals ensure that the fluid can be evenly covered inside the shell 411, avoiding the problem of insufficient local purification, thereby improving the overall purification efficiency. In addition, this design of increasing angles and equal distribution also helps to reduce the energy consumption of the fluid during the spraying process, thereby achieving more energy-saving and efficient exhaust gas purification treatment.

[0048] Preferably (not shown), the detection component 51 includes at least one of a gas detector, a gas sensor module and a gas analyzer, and the execution component 52 includes a solenoid valve or an electric valve.

[0049] Specifically, the detection component 51 can monitor the concentration of pollutants in the exhaust gas in real time to ensure that the purification effect meets the standards. The gas detector can quickly respond and display the pollutant content in the exhaust gas, providing operators with intuitive monitoring data; the gas sensor module can measure the concentration of specific pollutants with high precision to achieve more accurate monitoring; the gas analyzer can conduct a comprehensive analysis of the exhaust gas to provide a scientific basis for purification treatment.

[0050] The execution component 52, such as a solenoid valve or an electric valve, accurately controls the exhaust gas emission and purification process based on the data provided by the detection component 51.

[0051] Preferably, Figure 1-Figure 3 As shown, the collection module 1 includes a plurality of gas collecting plates 11, which are placed correspondingly at a plurality of exhaust ports of the plastic extrusion equipment. The plurality of gas collecting plates 11 are used for directional diversion and collection of exhaust gas discharged from the plurality of exhaust ports.

[0052] Specifically, the design of the gas collecting plate 11 can not only effectively capture the exhaust gas and prevent it from escaping into the environment, but also guide the exhaust gas to different parts of the purification system through directional diversion to ensure that each exhaust gas can be fully treated;

[0053] Furthermore, the gas collection plates 11 are typically constructed from corrosion-resistant and high-temperature-resistant materials to accommodate the various chemicals and high-temperature environments that may be present in the exhaust gas. The shape and size of the gas collection plates 11 are also optimized based on the actual exhaust port location to ensure optimal collection efficiency. Through the coordinated action of multiple gas collection plates 11, the entire collection module 1 achieves efficient and comprehensive exhaust gas collection, providing a solid foundation for subsequent purification treatment.

[0054] Preferably, Figure 1-Figure 3 As shown, the diversion and guiding module 2 includes multiple branch pipes 21 and a main pipe 22 connecting the multiple branch pipes 21, the gas collecting plate 11 is connected to the branch pipe 21, the first processing module 3 and the air inlet end of the shell 411 are correspondingly connected to the main pipe 22, and the main pipe 22 diverts and guides the exhaust gas into the first exhaust gas and the second exhaust gas, wherein the first exhaust gas is introduced into the first processing module 3, and the second exhaust gas is introduced into the air inlet end of the shell 411.

[0055] Specifically, the multiple branch pipes 21 allow the exhaust gas to be more evenly distributed in the main pipe 22, so that the multiple exhaust gas discharge ports of the extruder can collect the exhaust gas to avoid the overflow of the exhaust gas. The main pipe 22 divides the exhaust gas into two streams, the first exhaust gas and the second exhaust gas, which are respectively introduced into different processing modules, so that the first exhaust gas and the second exhaust gas will undergo different purification processes in their respective processing modules, and finally achieve comprehensive purification of the exhaust gas together.

[0056] Preferably, Figure 2 and Figure 3 As shown, the first processing module 3 includes a thermal oxidation shell 31 and a combustion component 32. The combustion component 32 is installed in the thermal oxidation shell 31. The air inlet end of the thermal oxidation shell 31 is connected to the main pipe 22. The combustion component 32 is used for thermal oxidation treatment of the first tail gas.

[0057] Specifically, the thermal oxidation shell 31 is made of high-temperature resistant material and can withstand the high temperature generated during the combustion process. After the first exhaust gas enters, it is burned by the combustion component 32 to ensure that the first exhaust gas can be fully burned and the harmful substances therein are effectively removed.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for separating and treating plastic extrusion tail gas, characterized in that: include: A collection module, the collection module is arranged at multiple exhaust ports of the plastic extrusion equipment, and the collection module is used for directional diversion and collection of exhaust gas discharged from the multiple exhaust ports; A diversion and guidance module, the diversion and guidance module is connected to the collection module, and the diversion and guidance module is used for diversion and guidance of the exhaust gas, wherein the exhaust gas diversion and guidance is a first exhaust gas and a second exhaust gas, and the concentration of the first exhaust gas is greater than that of the second exhaust gas; a first processing module, the first processing module being connected to the diversion and guide module, and being used to process the first tail gas; a second processing module, the second processing module being connected to the diversion and guide module, and being used to process the second tail gas; A control module, the control module includes a detection component and an execution component, the detection component is installed on the second processing module, the execution component is installed in the second processing module, the detection component is used for gas concentration detection, and the execution component is used to control the flow direction of the second exhaust gas in the second processing module so that the second exhaust gas can be combined and processed.

2. The device for separating and treating plastic extrusion tail gas according to claim 1, characterized in that: The second processing module includes a wet spray component, a processing component and an interactive component. The processing component includes an activated carbon adsorption component, a biological decomposition component and a photocatalytic oxidation component. The air inlet end of the wet spray component is connected to the diversion guide module, and the air outlet end of the wet spray component is connected to the interactive component. The interactive component is respectively connected to the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component. The interactive component, the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component are all connected to the detection component to detect the concentration of the second exhaust gas after treatment. The interactive component is connected to the execution component, and the execution component controls the flow direction of the second exhaust gas so that the second exhaust gas can flow interactively between the activated carbon adsorption component, the biological decomposition component and the photocatalytic oxidation component.

3. The method for treating plastic extrusion tail gas by quality separation according to claim 2, characterized in that: The interactive component includes a plurality of interconnected pipes, which are respectively connected to the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The pipes are connected to an execution component, which is used to control the interactive circulation of the second exhaust gas between the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The detection component is installed at the air outlet ends of the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component. The detection component is installed at the air outlet ends of the activated carbon adsorption component, the biodegradation component and the photocatalytic oxidation component, and the air outlet ends are all connected to the air outlet pipe, and the air outlet pipe is connected to the execution component.

4. The method for treating plastic extrusion tail gas by quality separation according to claim 3, characterized in that: The wet spray component includes a shell, a porous spray mechanism and a water supply mechanism. The air inlet end of the shell is connected to the diversion guide module. The porous spray mechanism and the water supply mechanism are installed in the shell. The water supply mechanism is connected to the porous spray mechanism. The water supply mechanism supplies high-pressure fluid and distributes it through the porous spray mechanism. The fluid is used to perform preliminary purification treatment on the second exhaust gas.

5. The method for treating plastic extrusion tail gas by quality separation according to claim 4, characterized in that: The air inlet openings inside the shell are increased gradually, and the multi-hole spray mechanism is provided with multiple groups of spray ports, which are all arranged at an angle, and the multiple groups of spray ports are all facing the air inlet end of the shell.

6. The method for treating plastic extrusion tail gas by quality separation according to claim 5, characterized in that: The multiple groups of spray ports arranged at the air inlet end of the shell along the direction of the air outlet end have increasing angles with the horizontal plane, and the multiple groups of spray ports are equidistantly distributed in the shell.

7. The method for treating plastic extrusion tail gas by quality separation according to claim 6, characterized in that: The detection component includes at least one of a gas detector, a gas sensor module and a gas analyzer, and the execution component includes a solenoid valve or an electric valve.

8. The method for treating plastic extrusion tail gas by quality separation according to claim 7, characterized in that: The collection module includes a plurality of gas collecting plates, which are placed correspondingly at the plurality of exhaust ports of the plastic extrusion equipment. The plurality of gas collecting plates are used for directionally diverting and collecting the exhaust gas discharged from the plurality of exhaust ports.

9. The method for treating plastic extrusion tail gas by quality separation according to claim 8, characterized in that: The diversion and guiding module includes multiple branch pipes and a main pipe connected to the multiple branch pipes. The gas collecting plate is connected to the branch pipes. The first processing module and the air inlet end of the shell are correspondingly connected to the main pipe. The main pipe diverts and guides the exhaust gas into the first exhaust gas and the second exhaust gas, wherein the first exhaust gas is introduced into the first processing module and the second exhaust gas is introduced into the air inlet end of the shell.

10. The method for treating plastic extrusion tail gas by quality separation according to claim 9, characterized in that: The first processing module includes a thermal oxidation shell and a combustion component. The combustion component is installed in the thermal oxidation shell. The air inlet end of the thermal oxidation shell is connected to the main pipe. The combustion component is used for thermal oxidation treatment of the first tail gas.

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