A multi-rotor exhaust treatment system with adjustable emission concentration

Abstract

The utility model discloses a kind of discharging concentration adjustable multi-rotor waste gas treatment systems, comprising: waste gas intake pipe;Waste gas purification pipeline, waste gas purification pipeline is connected after waste gas intake pipe, waste gas purification pipeline includes at least three groups of rotors;First switching pipeline, the first switching pipeline is connected with waste gas purification pipeline;First valve group, the first valve group is connected with first switching pipeline, waste gas purification pipeline, to switch on first switching pipeline or waste gas purification pipeline, switch the number of rotor or rotor combination in waste gas purification pipeline is accessed, and the adsorption area of rotor in waste gas purification pipeline is accessed is connected in series arrangement.The number of rotor of selectable series operation, one machine satisfies multiple different emission standards, the combination of rotor of selectable series operation, with spare wheel mechanism, maintenance without shutdown, ensure production without stop.The utility model has the advantages of one machine satisfying multiple different emission standards, rotor can be replaced at any time and production without stop.

Description

Technical Field

[0001] This application relates to the field of organic waste gas treatment equipment, specifically to a multi-rotor waste gas treatment system with adjustable emission concentration. Background Technology

[0002] Industrial waste gas is an important component of air and environmental pollution and one of the main causes of smog in most areas. With industrial development, various industries will generate various waste gases, which must be treated before being discharged. For example, in the semiconductor industry, the waste gas generated is collected through the exhaust system and can be treated by zeolite rotor concentration and incineration.

[0003] As a waste gas treatment device, the adsorption zone of the zeolite rotor can adsorb organic pollutants in the waste gas, and the purified gas is discharged. By rotating, the adsorbent can be rotated to the desorption zone. During the process of contact with high-temperature air, the organic pollutants are desorbed and flow out with the regeneration air. The adsorbent is regenerated and can be re-adsorbed after being cooled in the cooling zone. The organic pollutants are concentrated to a high concentration and a small air volume, thereby reducing the investment and operating costs of the downstream treatment equipment and improving the high-efficiency treatment of waste gas.

[0004] Currently, there are implementation standards for exhaust gas emissions, and different emission standards apply to different industries. If the emission concentration specified by the emission standard is high, the existing single-stage zeolite rotor system is usually used for adsorption. If the emission concentration specified by the emission standard is low, multiple sets of zeolite rotor systems need to be equipped for adsorption. Different emission concentrations are achieved through different zeolite rotor systems, which not only occupy a large area but also have a high cost. In addition, when a certain stage of zeolite rotor becomes clogged and needs maintenance, the machine needs to be shut down for repair, affecting the entire production process. Utility Model Content

[0005] Therefore, there is a need to provide a multi-rotor exhaust gas treatment system with adjustable emission concentration to solve the problems that existing zeolite rotor systems cannot meet various emission standards, and that zeolite rotor blockage requires the entire machine to be shut down for maintenance, affecting the production process.

[0006] To achieve the above objectives, the inventors provide a multi-rotor exhaust gas treatment system with adjustable emission concentration, comprising:

[0007] Exhaust gas intake pipe;

[0008] An exhaust gas purification pipeline is connected after the exhaust gas inlet pipe, and the exhaust gas purification pipeline includes at least three sets of impellers.

[0009] The first switching pipeline is connected to the exhaust gas purification pipeline;

[0010] The first valve group, together with the first switching pipeline and the exhaust gas purification pipeline, is connected to the first switching pipeline or the exhaust gas purification pipeline to switch the number or combination of rotors connected to the exhaust gas purification pipeline, and the adsorption zones of the rotors connected to the exhaust gas purification pipeline are connected in series.

[0011] In some embodiments, the exhaust gas purification pipeline includes a plurality of purification pipes, which connect the adsorption zones of a plurality of rotating wheels in series.

[0012] In some embodiments, the first switching pipeline includes a plurality of bypass pipes connected in sequence, with the outlet of the upstream bypass pipe connected to the middle section of the downstream bypass pipe, the outlet of the downstream bypass pipe connected to the exhaust equipment, and the inlets of the plurality of bypass pipes connected one-to-one to a plurality of purification pipes; the first valve group is provided with a plurality of switching valve groups, which conduct the one-to-one connected bypass pipes or purification pipes through the switching valve groups to switch the number or combination of impellers connected to the exhaust gas purification pipeline.

[0013] In some embodiments, the switching valve group includes an air inlet valve located at the purification pipe and a bypass valve located at the bypass pipe, wherein the air inlet valve is located between the connection point of the bypass pipe and the purification pipe and the inlet of the adsorption zone of the impeller.

[0014] In some embodiments, the rotary wheel is provided in three sets.

[0015] In some embodiments, the system further includes a first operating condition, a second operating condition, and a third operating condition, wherein the switching valve group is used to switch between the first operating condition, the second operating condition, and the third operating condition; in the first operating condition, the number of impellers connected to the exhaust gas purification pipeline is one set; in the second operating condition, the number of impellers connected to the exhaust gas purification pipeline is two sets; and in the third operating condition, the number of impellers connected to the exhaust gas purification pipeline is three sets.

[0016] In some embodiments, the three sets of rotors are respectively a first-stage rotor, a second-stage rotor, and a third-stage rotor; the rotor assembly includes:

[0017] First assembly: Level 1 rotary wheel;

[0018] Second assembly: Secondary rotor;

[0019] Third combination: Three-stage rotating wheel;

[0020] Fourth combination: primary reel, secondary reel;

[0021] Fifth combination: First-stage rotating wheel, third-stage rotating wheel;

[0022] Sixth combination: Second-stage and third-stage rotating wheels;

[0023] The seventh combination consists of a first-stage rotating wheel, a second-stage rotating wheel, and a third-stage rotating wheel.

[0024] In some embodiments, the desorption zone outlet of each set of impellers is connected to a second switching pipeline. The second switching pipeline includes a branch pipe, a main pipe, and a second valve group that switches the branch pipe or the main pipe to conduct. The main pipe is connected to the exhaust gas treatment equipment, and the branch pipe is connected back to the exhaust gas inlet pipe.

[0025] In some embodiments, the inlet of the adsorption zone and the inlet of the cooling zone of the rotor are both connected to the exhaust gas purification pipeline, and the outlet of the cooling zone of the rotor is connected to the inlet of the desorption zone through a heating device to form a loop.

[0026] Unlike existing technologies, the above-described adjustable emission concentration multi-rotor exhaust gas treatment system delivers exhaust gas to be treated through an exhaust gas inlet pipe to an exhaust gas purification pipeline. The exhaust gas purification pipeline includes at least three sets of rotors, whose adsorption zones adsorb the exhaust gas. A first switching pipeline is connected to the exhaust gas purification pipeline, and a first valve group is connected to both the first switching pipeline and the exhaust gas purification pipeline to switch the number or combination of rotors connected to the exhaust gas purification pipeline. The adsorption zones of the rotors connected to the exhaust gas purification pipeline are arranged in series, allowing the number of rotors connected in series to the exhaust gas purification pipeline to meet different emission standards, such as emission concentration requirements. If the emission concentration requirement is low, only three sets of impellers can be connected. The three sets of impellers will adsorb the waste gas in sequence and discharge it after reaching the emission standard. If the emission concentration requirement is high, four, five or more sets of impellers can be connected. Several sets of impellers will adsorb the waste gas in sequence and discharge it after reaching the emission standard. One machine can meet multiple different emission standards. In addition, if an impeller becomes blocked and needs maintenance, the first valve group can be used to select the impeller combination connected in series to the waste gas purification pipeline. The selected impeller combination does not include the blocked impeller, so the blocked impeller can be maintained without stopping the machine. Alternatively, the selected impeller combination does not include all impellers, and the idle impellers can be used as spare impellers to replace the damaged impellers at any time, ensuring uninterrupted production.

[0027] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0028] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0029] In the accompanying drawings of the instruction manual:

[0030] Figure 1This is a connection diagram of the multi-rotor exhaust gas treatment system with adjustable emission concentration described in the specific implementation method;

[0031] The reference numerals used in the above figures are explained as follows:

[0032] 1. Exhaust gas inlet pipe;

[0033] 2. Purification pipe;

[0034] 3. Bypass pipe;

[0035] 4. Intake valve;

[0036] 5. Bypass valve;

[0037] 6. Chimney;

[0038] 7. First-stage rotor;

[0039] 700, Adsorption zone; 701, Cooling zone; 702, Desorption zone;

[0040] 8. Secondary rotor;

[0041] 9. Three-stage rotating wheel;

[0042] 10. Waste gas treatment equipment;

[0043] 11. Branch pipe;

[0044] 12. Supervisor;

[0045] 13. Main valve;

[0046] 14. Branch valve;

[0047] 15. Heating equipment;

[0048] 16. Waste gas pretreatment equipment;

[0049] 17. First desorption fan;

[0050] 18. Second desorption fan;

[0051] 19. The third desorption fan;

[0052] 20. Exhaust fan. Detailed Implementation

[0053] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0054] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0055] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0056] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0057] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0058] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0059] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0060] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0061] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] Industrial waste gas is an important component of air and environmental pollution and one of the main causes of smog in most areas. With industrial development, various industries will generate various waste gases, which must be treated before being discharged. For example, in the semiconductor industry, the waste gas generated is collected through the exhaust system and can be treated by zeolite rotor concentration and incineration.

[0063] As a waste gas treatment device, the adsorption zone 700 of the zeolite rotor can adsorb organic pollutants in the waste gas, and the purified gas is discharged. By rotating, the adsorbent can be rotated to the desorption zone 702. During the process of contact with high-temperature air, the organic pollutants are desorbed and flow out with the regeneration air. The adsorbent is regenerated and can be re-adsorbed after being cooled by the cooling zone 701. The organic pollutants are concentrated to a high concentration and a small air volume, thereby reducing the investment cost and operating cost of the downstream treatment equipment and improving the high-efficiency treatment of waste gas.

[0064] Currently, there are implementation standards for exhaust gas emissions, and different emission standards apply to different industries. If the emission concentration specified by the emission standard is high, the existing single-stage zeolite rotor system is usually used for adsorption. If the emission concentration specified by the emission standard is low, multiple sets of zeolite rotor systems need to be equipped for adsorption. Different emission concentrations are achieved through different zeolite rotor systems, which not only occupy a large area but also have a high cost. In addition, when a certain stage of zeolite rotor becomes clogged and needs maintenance, the machine needs to be shut down for repair, affecting the entire production process.

[0065] This invention provides a multi-rotor exhaust gas treatment system with adjustable emission concentration for treating industrial exhaust gas. It is particularly suitable for semiconductor industry panel exhaust gas that meets different emission standards in different regions. One machine can meet multiple different emission standards and has a spare wheel mechanism, which can replace the rotor at any time to ensure uninterrupted production.

[0066] In a specific embodiment, the adjustable emission concentration multi-rotor exhaust gas treatment system includes an exhaust gas inlet pipe 1, an exhaust gas purification pipeline, a first switching pipeline, and a first valve group. The exhaust gas purification pipeline is connected after the exhaust gas inlet pipe 1 and includes at least three sets of rotors. The first switching pipeline is connected to the exhaust gas purification pipeline. The first valve group is connected to the first switching pipeline and the exhaust gas purification pipeline to conduct the first switching pipeline or the exhaust gas purification pipeline, switching the number or combination of rotors connected to the exhaust gas purification pipeline. The adsorption zones 700 of the rotors connected to the exhaust gas purification pipeline are arranged in series.

[0067] The adjustable emission concentration multi-rotor exhaust gas treatment system delivers exhaust gas to be treated to the exhaust gas purification pipeline through the exhaust gas inlet pipe 1. The exhaust gas purification pipeline includes at least three sets of rotors. The adsorption zone 700 of the rotors adsorbs the exhaust gas. A first switching pipeline is connected to the exhaust gas purification pipeline. A first valve group is connected to the first switching pipeline and the exhaust gas purification pipeline to conduct the first switching pipeline or the exhaust gas purification pipeline, switching the number or combination of rotors connected to the exhaust gas purification pipeline. The adsorption zones 700 of the rotors connected to the exhaust gas purification pipeline are arranged in series. Thus, according to the emission concentration requirements, the number of rotors connected in series to the exhaust gas purification pipeline can be selected by the first valve group to meet different emission standards. For example, if the emission concentration requirement is low, only three sets of rotors can be connected. The three sets of rotors adsorb the exhaust gas in sequence and discharge it after reaching the emission standard. If the emission concentration requirement is high, four, five or more sets of rotors can be connected. Several sets of rotors adsorb the exhaust gas in sequence and discharge it after reaching the emission standard. One machine can meet multiple different emission standards.

[0068] In addition, if a rotor becomes clogged and requires maintenance, the rotor combination connected in series to the exhaust gas purification pipeline can be selected through the first valve group. The selected rotor combination does not include the clogged rotor, so the clogged rotor can be maintained without stopping the machine. Alternatively, the selected rotor combination does not include all rotors, and the idle rotors can be used as spare rotors to replace the damaged rotors at any time, ensuring uninterrupted production.

[0069] Therefore, the adjustable emission concentration multi-rotor exhaust gas treatment system allows for selection of the number of rotors operating in series, enabling one machine to meet multiple different emission standards. It also allows for selection of the combination of rotors operating in series, has a spare rotor mechanism, and can be maintained without stopping the machine, ensuring uninterrupted production. It has the advantages of meeting multiple different emission standards with one machine, being able to replace rotors at any time, and ensuring uninterrupted production.

[0070] In some embodiments, the exhaust gas purification pipeline includes a plurality of purification pipes 2, which connect the adsorption zones 700 of a plurality of rotating wheels in series. That is, one end of the purification pipe 2 is connected to the outlet of the adsorption zone 700 of the upstream rotating wheel, and the other end of the purification pipe 2 is connected to the inlet of the adsorption zone 700 of the downstream rotating wheel. The exhaust gas inlet pipe 1 is connected to the inlet of the adsorption zone 700 of the first rotating wheel through the purification pipe 2. The outlet of the adsorption zone 700 of the last rotating wheel is connected to the exhaust equipment through the purification pipe 2.

[0071] In some embodiments, the system includes a plurality of bypass pipes 3 connected in sequence, with the outlet of the upstream bypass pipe 3 connected to the middle section of the downstream bypass pipe 3, and the outlet of the downstream bypass pipe 3 connected to an exhaust device. The inlets of the plurality of bypass pipes 3 are connected one-to-one to a plurality of purification pipes 2. Therefore, the exhaust gas can be delivered to the purification pipe 2 or the bypass pipe 3. The specific selection of delivery to the purification pipe 2 or the bypass pipe 3 is controlled by the first valve group. The first valve group is provided with a plurality of switching valve groups. Each pair of bypass pipes 3 and purification pipes 2 is connected to a switching valve group. The switching valve group selects to conduct the pair of bypass pipes 3 or purification pipes 2 to switch the number or combination of impellers connected to the exhaust gas purification pipe 2.

[0072] When the switching valve group connects the bypass pipe 3 in the one-to-one connection between the bypass pipe 3 and the purification pipe 2, a set of rotors connected downstream of the purification pipe 2 is not connected to the exhaust gas purification pipeline; when the switching valve group connects the purification pipe 2 in the one-to-one connection between the bypass pipe 3 and the purification pipe 2, a set of rotors connected downstream of the purification pipe 2 is connected to the exhaust gas purification pipeline; the same applies to other one-to-one connections between the bypass pipe 3 and the purification pipe 2, so that the number or combination of rotors connected to the exhaust gas purification pipeline can be selected.

[0073] In some embodiments, the switching valve group includes an air inlet valve 4 located at the purification pipe 2 and a bypass valve 5 located at the bypass pipe 3, wherein the air inlet valve 4 is located between the connection point of the bypass pipe and the purification pipe 2 and the inlet of the adsorption zone 700 of the rotor.

[0074] When the intake valve 4 is closed and the bypass valve 5 is open, the bypass pipe 3 in the one-to-one connection between the bypass pipe 3 and the purification pipe 2 is connected, and a set of rotors connected downstream of the purification pipe 2 is not connected to the exhaust gas purification pipeline. When the intake valve 4 is open and the bypass valve 5 is closed, the purification pipe 2 in the one-to-one connection between the bypass pipe 3 and the purification pipe 2 is connected, and a set of rotors connected downstream of the purification pipe 2 is connected to the exhaust gas purification pipeline. The same applies to other one-to-one connections between the bypass pipe 3 and the purification pipe 2, so the number or combination of rotors connected to the exhaust gas purification pipeline can be selected.

[0075] In some embodiments, the intake valve 4 and the bypass valve 5 are both electrically controlled valves; the system also includes a concentration detection module and a control module. The concentration detection module is located at the exhaust equipment to detect the emission concentration. The control module is connected to the intake valve 4, the bypass valve 5, and the concentration detection module to receive the concentration from the concentration detection module and control the intake valve 4 and the bypass valve 5. In real-time applications, the control module can control the intake valve 4 and the bypass valve 5 according to the feedback exhaust concentration to adjust the number or combination of impellers connected to the exhaust gas purification pipeline.

[0076] In some embodiments, the impeller is provided in three sets; it also includes a first working condition, a second working condition, and a third working condition, and the switching valve group is used to switch between the first working condition, the second working condition, and the third working condition; in the first working condition, the number of impellers connected to the exhaust gas purification pipeline is one set, in the second working condition, the number of impellers connected to the exhaust gas purification pipeline is two sets, and in the third working condition, the number of impellers connected to the exhaust gas purification pipeline is three sets.

[0077] In some embodiments, the control module is used to switch valve groups to switch between a first operating condition, a second operating condition, and a third operating condition.

[0078] In some embodiments, the rotating wheel has three sets; the three sets of rotating wheels are a first-stage rotating wheel 7, a second-stage rotating wheel 8, and a third-stage rotating wheel 9; the rotating wheel assembly includes:

[0079] First combination: Level 1 rotary wheel 7;

[0080] Second combination: Secondary rotary wheel 8;

[0081] Third combination: Three-stage rotating wheel 9;

[0082] Fourth combination: First-stage reel 7, second-stage reel 8;

[0083] Fifth combination: First-stage rotating wheel 7, third-stage rotating wheel 9;

[0084] Sixth combination: Secondary rotating wheel 8, tertiary rotating wheel 9;

[0085] The seventh combination consists of: a first-stage rotating wheel (7), a second-stage rotating wheel (8), and a third-stage rotating wheel (9).

[0086] In some embodiments, the impeller has three sets; the three sets of impellers are a primary impeller 7, a secondary impeller 8, and a tertiary impeller 9; the first operating condition can be starting the primary impeller 7, the second operating condition can be starting the primary impeller 7 and the secondary impeller 8, and the third operating condition can be starting the primary impeller 7, the secondary impeller 8, and the tertiary impeller 9; under the premise of the same exhaust gas concentration, different emission standards can be met by switching different operating conditions. Please refer to [link / reference]. Figure 1 The following example illustrates the situation with a waste gas concentration of 600 mg / m³:

[0087] Emission Standard 1: Start-up first operating condition, intake valve 4A is open, intake valves B, C, and D, bypass valve a is closed, bypass valves b and c are open, first stage rotor 7 is activated, only first stage rotor 7 operates, ensuring emission concentration ≤40mg / m3.

[0088] Emission Standard 2: When starting the second operating condition, intake valves A and B are opened, primary rotor 7 and secondary rotor 8 are opened, intake valves C and D are closed, bypass valves a and b are closed, bypass valve c is opened, primary rotor 7 and secondary rotor 8 are running, ensuring that the emission concentration is ≤20mg / m3.

[0089] Emission Standard 3: When intake valves A, B, C, and D are open, primary rotor 7, secondary rotor 8, and tertiary rotor 9 are activated. Bypass valves a, b, and c are closed, and primary rotor 7, secondary rotor 8, and tertiary rotor 9 are operated to ensure that the emission concentration is ≤5mg / m3.

[0090] Under emission standards, one set of rotary drums is activated, while the remaining two sets serve as backup. If a rotary drum becomes clogged and requires maintenance, the backup drums can be activated, ensuring uninterrupted production. Details are as follows:

[0091] Use the first-stage rotary wheel 7, the second-stage rotary wheel 8, and the third-stage rotary wheel 9 as backups;

[0092] Use the secondary rotary wheel 8, with the primary rotary wheel 7 and the tertiary rotary wheel 9 as backups;

[0093] Use the third-stage rotary wheel 9, with the second-stage rotary wheel 8 and the first-stage rotary wheel 7 as backups;

[0094] Under emission standard II, two sets of rotors are activated, with the remaining set serving as a backup. If the rotor is blocked and requires maintenance, the backup rotor can be activated to ensure uninterrupted production.

[0095] Use the first-stage rotary wheel 7, the second-stage rotary wheel 8, and the third-stage rotary wheel 9 as backup;

[0096] Use the first-stage rotary wheel 7, the third-stage rotary wheel 9, and the second-stage rotary wheel 8 as a spare;

[0097] Use secondary rotary wheel 8 and tertiary rotary wheel 9, with primary rotary wheel 7 as a spare.

[0098] The runner can be maintained during the standby period to restore its efficiency.

[0099] In some embodiments, the outlet of the desorption zone 702 of each set of impellers is connected to a second switching pipeline. The second switching pipeline includes a branch pipe 11, a main pipe 12, and a second valve group that switches the branch pipe 11 or the main pipe 12 to conduct. The main pipe 12 is connected to the exhaust gas treatment equipment 10, and the branch pipe 11 is connected back to the exhaust gas inlet pipe 1.

[0100] The desorption zone 702 outlet of each set of impellers is connected to the second switching pipeline through a desorption fan. There are three sets of impellers: a first-stage impeller 7, a second-stage impeller 8, and a third-stage impeller 9. The desorption zone 702 outlet of the first-stage impeller 7 is connected to the second switching pipeline through a first desorption fan 17, the desorption zone 702 outlet of the second-stage impeller 8 is connected to the second switching pipeline through a second desorption fan 18, and the desorption zone 702 outlet of the third-stage impeller 9 is connected to the second switching pipeline through a third desorption fan 19.

[0101] With two or three sets of desorption fans turned on, the first desorption fan 17 desorbs the gas and sends it to the back-end exhaust gas treatment equipment. The other second desorption fans 18 and third desorption fans 19 can be considered to return to the exhaust gas inlet pipe after desorption, depending on the concentration, so as to play the role of enriching the exhaust gas.

[0102] The second valve group includes a three-way directional valve. Both the branch pipe 11 and the main pipe are connected to the three-way directional valve, and the direction of desorbed VOCs is switched through the three-way directional valve.

[0103] In other embodiments, the second valve group includes a main valve 13 located at the main pipe and a branch valve 14 located at the branch pipe.

[0104] In some embodiments, the second valve group is a manual valve. By manually adjusting the second valve group, the exhaust gas delivery path and the desorbed VOCs delivery path can be adjusted to meet different exhaust gas concentrations.

[0105] In some embodiments, the control module is connected to the second valve group to control the second valve group.

[0106] In some embodiments, the inlet of the adsorption zone 700 and the inlet of the cooling zone 701 of the rotor are both connected to the exhaust gas purification pipeline, and the outlet of the cooling zone 701 of the rotor is connected to the inlet of the desorption zone 702 through the heating device 15 to form a loop.

[0107] In some embodiments, the heating device 15 is a heater or a heat exchanger.

[0108] In some embodiments, the system further includes an exhaust gas pretreatment device 16, which is connected to the exhaust gas inlet pipe 1. The exhaust gas is treated by the exhaust gas pretreatment device 16 and then transported to the exhaust gas inlet pipe 1.

[0109] In some embodiments, the system further includes an exhaust fan 20, the air inlet of which is connected to the outlet of the adsorption zone 700 of the last rotor, and the air outlet of the exhaust pipe is connected to the chimney 6.

[0110] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A multi-rotor exhaust gas treatment system with adjustable emission concentration, characterized in that, include: Exhaust gas intake pipe; An exhaust gas purification pipeline is connected after the exhaust gas inlet pipe, and the exhaust gas purification pipeline includes at least three sets of impellers. The first switching pipeline is connected to the exhaust gas purification pipeline; The first valve group, together with the first switching pipeline and the exhaust gas purification pipeline, is connected to the first switching pipeline or the exhaust gas purification pipeline to switch the number or combination of rotors connected to the exhaust gas purification pipeline, and the adsorption zones of the rotors connected to the exhaust gas purification pipeline are connected in series.

2. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 1, characterized in that, The exhaust gas purification pipeline includes several purification pipes, which connect the adsorption zones of several rotating wheels in series.

3. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 2, characterized in that, The first switching pipeline includes several bypass pipes connected in sequence, with the outlet of the upstream bypass pipe connected to the middle section of the downstream bypass pipe, and the outlet of the downstream bypass pipe connected to the exhaust equipment. The inlets of the several bypass pipes are connected one-to-one to several purification pipes. The first valve group is equipped with several switching valve groups, which are used to switch the number or combination of impellers connected to the exhaust gas purification pipeline by connecting the one-to-one bypass pipes or purification pipes.

4. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 3, characterized in that, The switching valve group includes an air inlet valve located at the purification pipe and a bypass valve located at the bypass pipe, with the air inlet valve situated between the connection point of the bypass pipe and the purification pipe and the inlet of the adsorption zone of the rotor.

5. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 3 or 4, characterized in that, The rotor has three sets.

6. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 5, characterized in that, It also includes a first operating condition, a second operating condition, and a third operating condition. The switching valve group is used to switch between the first operating condition, the second operating condition, and the third operating condition. In the first operating condition, the number of impellers connected to the exhaust gas purification pipeline is one set. In the second operating condition, the number of impellers connected to the exhaust gas purification pipeline is two sets. In the third operating condition, the number of impellers connected to the exhaust gas purification pipeline is three sets.

7. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 5, characterized in that, The three sets of rotating wheels are respectively a first-stage rotating wheel, a second-stage rotating wheel, and a third-stage rotating wheel; the rotating wheel assembly includes: First assembly: Level 1 rotary wheel; Second assembly: Secondary rotor; Third combination: Three-stage rotating wheel; Fourth combination: primary and secondary rotating wheels; Fifth combination: First-stage rotating wheel, third-stage rotating wheel; Sixth combination: Second-stage and third-stage rotating wheels; The seventh combination consists of a first-stage rotating wheel, a second-stage rotating wheel, and a third-stage rotating wheel.

8. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 1, characterized in that, Each set of rotors has a second switching pipeline connected to its desorption zone outlet. The second switching pipeline includes a branch pipe, a main pipe, and a second valve group that switches between the branch pipe and the main pipe. The main pipe is connected to the exhaust gas treatment equipment, and the branch pipe is connected back to the exhaust gas inlet pipe.

9. The multi-rotor exhaust gas treatment system with adjustable emission concentration according to claim 1, characterized in that, The inlet of the adsorption zone and the inlet of the cooling zone of the rotor are both connected to the exhaust gas purification pipeline, and the outlet of the cooling zone of the rotor is connected to the inlet of the desorption zone through heating equipment to form a loop.

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