A zeolite molecular sieve adsorbs and desorbs VOCs exhaust gas treatment device and treatment method

Abstract

The application discloses a kind of zeolite molecular sieve adsorption desorption VOCs waste gas processing device and processing method, it is related to waste gas treatment technical field.The zeolite molecular sieve adsorption desorption VOCs waste gas processing device and processing method, including shell, the shell is divided into adsorption zone, desorption zone and cooling zone, further including fan-shaped zeolite piece, be located in shell interior, multiple fan-shaped zeolite piece splicing is formed into circular zeolite runner;Shaft, the shaft is located in the middle of zeolite runner, fan-shaped zeolite piece can be moved on the shaft along axial direction.This application is spliced into circular zeolite runner by setting multiple fan-shaped zeolite piece, under the cooperation of sliding part and guide groove, control the axial stagger of two fan-shaped zeolite pieces in adjacent when being located in desorption zone and cooling zone along zeolite runner, increase the contact area of fan-shaped zeolite piece and hot air and cooling air, beneficial to realize efficient desorption and cooling.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a treatment device and method for VOCs waste gas adsorption and desorption using zeolite molecular sieves. Background Technology

[0002] Waste gas treatment refers to the process of treating waste gas generated in industrial sites and factory workshops before it is discharged to meet national emission standards. A zeolite rotor is a device that concentrates volatile organic compounds (VOCs) before sending them to incineration equipment for purification. It includes an adsorption zone, a desorption zone, and a cooling zone. In the adsorption zone, the concentrated VOCs are adsorbed, achieving the purpose of VOC concentration. In the desorption zone, hot air desorbs the concentrated VOCs and sends them to the incineration unit for purification. The zeolite rotor is then cooled in the cooling zone to continue adsorption. The zeolite rotor achieves continuous adsorption and desorption through rotation.

[0003] The adsorption, desorption, and cooling zones of existing zeolite rotors are pre-defined at the factory, with the adsorption zone needing to be significantly larger than the desorption and cooling zones to increase the adsorption area and meet adsorption requirements. To remove VOCs from the zeolite rotor, the heating system needs to operate continuously at full load to maintain a desorption temperature of 180-220℃. However, the zeolite rotor itself has thickness, and its exterior directly contacts the hot air, resulting in better desorption. Incomplete desorption within the rotor leads to significant energy waste due to the high temperature in the desorption zone. Similarly, the cooling zone is prone to incomplete cooling, affecting the recovery of the zeolite rotor's adsorption capacity and consequently impacting the next adsorption cycle. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a treatment device and method for VOCs waste gas adsorption and desorption using zeolite molecular sieves, which solves the problems of incomplete desorption and cooling, and wasted energy consumption.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a treatment device for VOCs waste gas adsorption and desorption using zeolite molecular sieves, comprising a shell, wherein the interior of the shell is divided into an adsorption zone, a desorption zone, and a cooling zone, and further comprising:

[0006] Fan-shaped zeolite sheets are located inside the outer shell, and multiple fan-shaped zeolite sheets are spliced ​​together to form a circular zeolite rotor;

[0007] A rotating shaft is located in the middle of the zeolite wheel and drives the zeolite wheel to rotate, allowing the fan-shaped zeolite flakes to move axially along the rotating shaft.

[0008] The sliding part, the guide groove, and the first arc plate are provided. The sliding part is installed at the end of the fan-shaped zeolite sheet away from the rotating shaft. The first arc plate is fixed inside the outer shell. The guide groove is located on the first arc plate. When the fan-shaped zeolite sheet rotates synchronously with the rotating shaft, the guide groove controls the two adjacent sliding parts to stagger along the axial direction of the zeolite wheel when they are in the desorption zone and the cooling zone.

[0009] Furthermore, the guide groove includes:

[0010] The first arc-shaped groove is located in the area of ​​the first arc plate opposite to the adsorption area;

[0011] The third arc-shaped groove is located in the area at the junction of the desorption zone and the cooling zone on the first arc plate;

[0012] Two separate tracks are provided between the third arc groove and the first arc groove, so that the sliding part alternates between the desorption zone and the cooling zone.

[0013] Furthermore, the single-track branch includes a first branch groove located at the inlet end of the desorption zone and the cooling zone and a second branch groove located at the outlet end of the desorption zone and the cooling zone, as well as a second arc-shaped groove for connecting the first branch groove and the second branch groove. A fixed guide block is provided in the area of ​​the first arc plate opposite to the first branch groove, and the fixed guide block is provided with inclined surfaces with the same two deflection angles as the first branch groove.

[0014] The sliding part includes a fixed shaft. After the upper end of the fixed shaft passes through the guide groove, a movable guide block is fixedly sleeved on it. The movable guide block has a structure with an inclined surface. The inclined surfaces of the movable guide blocks on two adjacent fan-shaped zeolite sheets are in opposite directions and respectively cooperate with the two inclined surfaces of the fixed guide block.

[0015] Furthermore, it also includes:

[0016] A second connecting shaft is located at the end of the fan-shaped zeolite sheet away from the rotating shaft. A first gear is installed on the second connecting shaft. A rack is provided in a section of the guide groove located in the desorption zone and the cooling zone, so that the first gear rotates 180 degrees when passing the rack, thereby causing the fan-shaped zeolite sheet to flip.

[0017] Furthermore, the fan-shaped zeolite sheet includes a first zeolite molecular sieve and a second zeolite molecular sieve disposed at the end of the first zeolite molecular sieve away from the rotating shaft. The second zeolite molecular sieve and the first zeolite molecular sieve partially overlap radially. The second zeolite molecular sieve and the first zeolite molecular sieve are provided with a pressing component in the radial direction. The pressing component can apply pressure to the second zeolite molecular sieve when the fan-shaped zeolite sheet reaches the section of the rack, so that the second zeolite molecular sieve is separated from the inner wall of the first arc-shaped plate.

[0018] Furthermore, the pressing component includes:

[0019] A fixed shaft three is fixedly connected to the second zeolite molecular sieve through the sliding part, and a spring is sleeved on the outside of the fixed shaft three.

[0020] The second arc-shaped plate is located at the top of the fixed shaft three. The side of the second arc-shaped plate near the fixed shaft three is divided into a first arc-shaped part and a second arc-shaped part with different heights. The second arc-shaped part corresponds to the section position of the rack. The second arc-shaped part can apply pressure to the fixed shaft three to cause the spring to contract.

[0021] Furthermore, a slider is provided in the middle of the lower surface of the first zeolite molecular sieve, and the slider is rotatably connected to the first zeolite molecular sieve by a pin.

[0022] The rotating shaft is provided with a slide rail that cooperates with the slider along the axial direction, and a drive component that drives the rotating shaft to rotate is provided on one side of the rotating shaft.

[0023] Furthermore, the zeolite rotor is provided with inclined baffle one, inclined baffle two, longitudinal baffle and transverse baffle on both sides, which form a sealed desorption zone and cooling zone with the outer shell;

[0024] The two corresponding inclined baffles, inclined baffle 1 and inclined baffle 2, form a transition groove between the longitudinal baffles, which can accommodate a single fan-shaped zeolite sheet to pass through. The two corresponding transverse baffles form a cavity, which can accommodate the fan-shaped zeolite sheets to be staggered along the axial direction of the zeolite wheel.

[0025] Furthermore, an air inlet pipe and an exhaust pipe are respectively provided on both sides of the outer shell, and the air inlet pipe and the exhaust pipe are connected to the adsorption area;

[0026] The upper part of the outer shell is provided with a hot air inlet pipe, a hot air outlet pipe, a cooling air inlet pipe, and a normal temperature air outlet pipe. The hot air inlet pipe and the hot air outlet pipe are connected to the desorption zone, and the cooling air inlet pipe and the normal temperature air outlet pipe are connected to the cooling zone.

[0027] On the other hand, the present invention also provides a method for treating VOCs waste gas by adsorption and desorption using zeolite molecular sieves, comprising the following steps:

[0028] During the adsorption stage, the zeolite rotor rotates slowly, and the pretreated VOCs waste gas is introduced into the adsorption zone and adsorbed by the fan-shaped zeolite plates. The purified gas is discharged through the exhaust pipe.

[0029] During the desorption stage, after the fan-shaped zeolite sheets in the adsorption zone become saturated, they rotate into the desorption zone. The high-temperature environment causes VOCs to detach from the fan-shaped zeolite sheets and be discharged with the hot air flow.

[0030] During the cooling stage, the desorbed fan-shaped zeolite flakes rotate into the cooling zone, where they come into contact with clean air at room temperature to lower the temperature and restore their adsorption capacity. They then rotate back into the adsorption zone to begin the next round of adsorption.

[0031] The guide groove controls the two adjacent fan-shaped zeolite plates to stagger along the axial direction of the zeolite rotor when they are in the desorption zone and the cooling zone, which increases the contact area between the fan-shaped zeolite plates and the hot air and cooling air, and facilitates efficient desorption and cooling.

[0032] The present invention has the following beneficial effects:

[0033] 1. The treatment device and method for VOCs waste gas adsorption and desorption by zeolite molecular sieve is to set up a circular zeolite wheel by splicing multiple fan-shaped zeolite plates. With the cooperation of the sliding part and the guide groove, the adjacent two fan-shaped zeolite plates are controlled to be staggered along the axis of the zeolite wheel when they are in the desorption zone and the cooling zone, which increases the contact area between the fan-shaped zeolite plates and the hot air and cooling air, which is conducive to achieving efficient desorption and cooling.

[0034] 2. The treatment device and method for VOCs waste gas adsorption and desorption by zeolite molecular sieve, by setting rack and first gear, allows the fan-shaped zeolite plates to rotate 180 degrees about a fixed shaft when they are separated and intersected with adjacent fan-shaped zeolite plates in the desorption zone, so that the other side of the fan-shaped zeolite plates faces the air inlet pipe, making full use of both sides of the fan-shaped zeolite plates.

[0035] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0036] Figure 1 This is a first-view overall view of the present invention;

[0037] Figure 2 This is a second-view overall view of the present invention;

[0038] Figure 3 This is a cross-sectional view of the outer casing of the present invention;

[0039] Figure 4 for Figure 3 Enlarged schematic diagram of part A;

[0040] Figure 5 This is a schematic diagram of the partition and the outer shell of the present invention;

[0041] Figure 6 This is a schematic diagram of the zeolite rotor and the first arc-shaped plate of the present invention;

[0042] Figure 7 This is a schematic diagram of the first arc-shaped plate, the second arc-shaped plate, and the zeolite rotor of the present invention;

[0043] Figure 8 This is a schematic diagram of the guide groove of the present invention;

[0044] Figure 9 This is an overall view of the fan-shaped zeolite sheet of the present invention;

[0045] Figure 10This is a schematic diagram of the fan-shaped zeolite sheet and the second arc-shaped plate of the present invention;

[0046] Figure 11 This is an exploded view of the fan-shaped zeolite sheet of the present invention;

[0047] Figure 12 This is a schematic diagram of the fan-shaped zeolite sheet and slider of the present invention;

[0048] Figure 13 This is a schematic diagram showing the changes in the working states (A)-(D) of the fan-shaped zeolite sheet of the present invention.

[0049] In the diagram, 1. Inlet pipe; 2. Exhaust pipe; 3. Outer shell; 31. Hot air inlet pipe; 32. Hot air exhaust pipe; 33. Cooling air inlet pipe; 34. Normal temperature air exhaust pipe; 41. Inclined partition one; 42. Inclined partition two; 43. Longitudinal partition; 44. Transverse partition; 5. Fan-shaped zeolite sheet; 51. First zeolite molecular sieve; 52. Second zeolite molecular sieve; 53. Pin shaft; 54. Groove; 55. Support frame; 56. Slider; 61. Guide groove; 611. First arc-shaped groove; 612. First branch groove; 613. Second arc-shaped groove; 614. Second branch groove; 6 15. Third arc-shaped groove; 62. Moving guide block; 63. Fixed shaft one; 631. Through groove; 65. First arc-shaped plate; 71. Connecting shaft two; 72. First gear; 73. Rack; 8. Pressing assembly; 81. Fixed shaft three; 82. Spring; 83. Baffle; 84. Fixed claw plate; 85. Second arc-shaped plate; 851. First arc-shaped part; 852. Second arc-shaped part; 91. Rotating shaft; 911. Slide rail; 92. Support block; 93. Second gear; 94. Third gear; 95. Motor; 10. Adsorption zone; 11. Desorption zone; 12. Cooling zone. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0052] The following is based on Figures 1-13This invention describes the apparatus and method for treating VOCs waste gas by adsorption and desorption using zeolite molecular sieves, as provided in embodiments of the present invention.

[0053] On the one hand, embodiments of the present invention provide a treatment device for VOCs waste gas adsorption and desorption using zeolite molecular sieves.

[0054] Please refer to Figures 1-3 The zeolite molecular sieve adsorption and desorption VOCs waste gas treatment device includes an outer shell 3, inside which are arranged fan-shaped zeolite plates 5. Multiple fan-shaped zeolite plates 5 are spliced ​​together to form a circular zeolite rotor. The fan-shaped zeolite plates 5 have a honeycomb structure and are uniformly loaded with zeolite molecular sieves. This structure can maximize the contact area and improve the adsorption efficiency. The zeolite rotor is provided with inclined baffle 1 41, inclined baffle 2 42, longitudinal baffle 43 and transverse baffle 44 on both sides. It forms a sealed adsorption zone 10, desorption zone 11 and cooling zone 12 between itself and the outer shell 3. The zeolite rotor rotates slowly, so that each fan-shaped zeolite plate 5 passes through the adsorption zone 10, desorption zone 11 and cooling zone 12 in sequence to achieve continuous working cycle and realize the efficient concentration and treatment of VOCs.

[0055] Please refer to Figures 1-3 and Figure 5 To facilitate the adsorption, desorption, and cooling processes, an inlet pipe 1 and an exhaust pipe 2 are respectively installed on both sides of the outer shell 3. The inlet pipe 1 and exhaust pipe 2 are connected to the adsorption zone 10. The upper part of the outer shell 3 is equipped with a hot air inlet pipe 31, a hot air outlet pipe 32, a cooling air inlet pipe 33, and a normal temperature air outlet pipe 34. The hot air inlet pipe 31 and hot air outlet pipe 32 are connected to the desorption zone 11, and the cooling air inlet pipe 33 and normal temperature air outlet pipe 34 are connected to the cooling zone 12. The pretreated VOCs waste gas first enters the adsorption zone 10 through the inlet pipe 1 and is adsorbed by the fan-shaped zeolite sheets 5. The purified VOCs waste gas... The gas is then discharged through exhaust pipe 2. After the fan-shaped zeolite plates 5 in the adsorption zone 10 gradually become saturated, they rotate into the desorption zone 11. High-temperature gas enters the desorption zone 11 through hot air inlet pipe 31, creating a high-temperature environment inside the desorption zone 11. This causes VOCs to detach from the fan-shaped zeolite plates 5 and be discharged through hot air outlet pipe 32 with the hot air flow. The desorbed fan-shaped zeolite plates 5 rotate into the cooling zone 12. Room temperature clean air enters the cooling zone 12 through cooling air inlet pipe 33 to lower the temperature of the fan-shaped zeolite plates 5 and restore their adsorption capacity. They then rotate back into the adsorption zone 10 to begin the next round of adsorption.

[0056] However, the proportions of the adsorption zone 10, desorption zone 11, and cooling zone 12 in existing zeolite rotors are factory presets. The adsorption zone 10 needs to have a significantly larger proportion than the desorption zone 11 and cooling zone 12 to increase the adsorption area and meet adsorption requirements. To remove VOCs from the zeolite rotor, the heating system needs to operate continuously at full load to maintain a desorption temperature of 180-220℃. Furthermore, the zeolite rotor itself has thickness, and its exterior directly contacts the hot air, resulting in better desorption. However, incomplete desorption inside leads to a significant waste of energy at high temperatures in the desorption zone 11. Similarly, the cooling zone 12 is prone to incomplete cooling, affecting the recovery of the zeolite rotor's adsorption capacity and consequently impacting the next adsorption cycle.

[0057] Therefore, please refer to Figures 3-9 The zeolite molecular sieve adsorption and desorption VOCs waste gas treatment device is also equipped with a rotating shaft 91, a sliding part, a guide groove 61, and a first arc plate 65. The rotating shaft 91 is located in the middle of the zeolite wheel and is used to drive the zeolite wheel to rotate. The sliding part is installed at the end of the fan-shaped zeolite sheet 5 away from the rotating shaft 91. The first arc plate 65 is fixed inside the outer shell 3. The guide groove 61 is located on the first arc plate 65. When the fan-shaped zeolite sheet 5 rotates synchronously with the rotating shaft 91, the guide groove 61 controls the two adjacent sliding parts to stagger along the axial direction of the zeolite wheel when they are located in the desorption zone 11 and the cooling zone 12. That is, the fan-shaped zeolite sheet 5 can move axially on the rotating shaft 91. During desorption and cooling, the adjacent fan-shaped zeolite sheets 5 separate and stagger, increasing the contact area between the fan-shaped zeolite sheet 5 and the hot air and cooling air, which is conducive to achieving efficient desorption and cooling.

[0058] Furthermore, in order to enable the guide groove 61 to control the two adjacent sliding parts to stagger along the axial direction of the zeolite wheel when located in the desorption zone 11 and the cooling zone 12, the guide groove 61 is provided with a first arc-shaped groove 611, a third arc-shaped groove 615, and two separate tracks located between the third arc-shaped groove 615 and the first arc-shaped groove 611. The first arc-shaped groove 611 is located on the first arc-shaped plate 65 in the region opposite to the adsorption zone 10, and the third arc-shaped groove 615 is located on the first arc-shaped plate 65 in the region at the junction of the desorption zone 11 and the cooling zone 12. The two-way branching track makes the sliding parts staggered when in the desorption zone 11 and the cooling zone 12. The single-way branching track includes a first branch groove 612 located at the inlet end of the desorption zone 11 and the cooling zone 12 and a second branch groove 614 located at the outlet end of the desorption zone 11 and the cooling zone 12, and a second arc-shaped groove 613 for connecting the first branch groove 612 and the second branch groove 614. Two adjacent sliding parts enter the second arc-shaped groove 613 of the two-way branching track through the first branch groove 612, respectively, so that two adjacent sliding parts staggered along the axial direction of the zeolite wheel when in the desorption zone 11 and the cooling zone 12.

[0059] In addition, to allow two adjacent sliding parts to enter the two separate tracks respectively, a fixed guide block is provided on the first arc plate 65 in the area opposite to the first branch groove 612. The fixed guide block has two inclined surfaces with the same deflection angle as the first branch groove 612. The sliding part includes a fixed shaft 63. After the upper end of the fixed shaft 63 passes through the guide groove 61, a movable guide block 62 is fixedly sleeved on it. The movable guide block 62 has an inclined surface structure. The inclined surfaces of the movable guide blocks 62 on two adjacent fan-shaped zeolite sheets 5 are opposite in direction and respectively opposite to the first branch groove 612. With the two inclined surfaces of the fixed guide block engaged, when the fan-shaped zeolite piece 5 rotates and approaches the first branch groove 612, the inclined surface of the moving guide block 62 at its top engages with one of the inclined surfaces of the fixed guide block. The fan-shaped zeolite piece 5 moves along one of the inclined surfaces of the fixed guide block, passes through the first branch groove 612, and enters the second arc-shaped groove 613 of the single-track. Since the inclined surfaces of the moving guide blocks 62 on the two adjacent fan-shaped zeolite pieces 5 are in opposite directions and engage with the two inclined surfaces of the fixed guide block respectively, the two adjacent fan-shaped zeolite pieces 5 can enter the two tracks respectively.

[0060] Specifically, to facilitate the staggered arrangement of adjacent fan-shaped zeolite flakes 5 along the axial direction of the zeolite rotor when located in the desorption zone 11 and cooling zone 12, and to ensure that this staggered arrangement does not affect the sealing between zones, thus preventing cross-contamination and reduced purification efficiency, a transition groove is formed between the two corresponding inclined baffles 41, inclined baffle 42, and longitudinal baffle 43. This groove allows a single fan-shaped zeolite flake 5 to pass through. The fan-shaped zeolite flakes 5 located on the two branch tracks enter the third arc-shaped groove 615 through the second branch groove 614. The two ends of the first arc-shaped groove 611 extend into the interior of the desorption zone 11 and cooling zone 12, ensuring that the fan-shaped zeolite flakes 5 return to a parallel state before and after passing through the boundary area of ​​the adsorption zone 10, desorption zone 11, and cooling zone 12, thus preventing the staggered arrangement of the fan-shaped zeolite flakes 5 from affecting the sealing between zones. Furthermore, a cavity is formed between the two corresponding transverse baffles 44 to accommodate the staggered arrangement of the fan-shaped zeolite flakes 5 along the axial direction of the zeolite rotor.

[0061] Furthermore, the contact surfaces of the inclined partition 41, the inclined partition 42, the longitudinal partition 43 and the fan-shaped zeolite sheet 5 are provided with high-temperature resistant elastic sealing gaskets.

[0062] However, in actual operation of the device, because the positions of the inlet pipe 1 and the exhaust pipe 2 are fixed, the VOCs waste gas can only be adsorbed in a fixed direction. This causes the part of the fan-shaped zeolite sheet 5 near the inlet pipe 1 to be saturated with adsorption earlier. In addition, the sticky substances of the VOCs waste gas will adhere to the surface of the fan-shaped zeolite sheet 5, block the zeolite channels, and affect the adsorption effect of the part of the fan-shaped zeolite sheet 5 near the exhaust pipe 2.

[0063] Therefore, please refer to Figure 7 and Figure 13A second connecting shaft 71 is also provided. The second connecting shaft 71 is located at the end of the fan-shaped zeolite sheet 5 away from the rotating shaft 91. A first gear 72 is installed on the second connecting shaft 71. A rack 73 is partially provided in a section of the guide groove 61 located between the desorption zone 11 and the cooling zone 12. The rack 73 is installed on the outer shell 3 so that the first gear 72 rotates 180 degrees when passing the rack 73, so that the other side of the fan-shaped zeolite sheet 5 faces the air inlet pipe 1, making full use of both sides of the fan-shaped zeolite sheet 5.

[0064] Preferably, the rack 73 is installed in the area opposite to the second arc groove 613, and the fan-shaped zeolite sheet 5 located in the second arc groove 613 is in an alternating and separated state with other adjacent fan-shaped zeolite sheets 5, which facilitates the rotation of the fan-shaped zeolite sheet 5.

[0065] It should be noted that when the movable guide block 62 rotates 180°, its shape and the position of the inclined surface remain unchanged before and after the rotation, and it can still cooperate with the inclined surface of the fixed guide block.

[0066] Please refer to Figures 7-11 To facilitate the rotation of the fan-shaped zeolite sheet 5 and prevent jamming due to the arc surface of the first arc plate 65, the fan-shaped zeolite sheet 5 is equipped with a first zeolite molecular sieve 51 and a second zeolite molecular sieve 52 located at the end of the first zeolite molecular sieve 51 away from the rotating shaft 91. The lower part of the second zeolite molecular sieve 52 is a plate structure that mates with the first zeolite molecular sieve 51, and the upper part is an arc structure that mates with the arc surface of the first arc plate 65. The first zeolite molecular sieve 51 has a groove 54 that mates with the lower part of the second zeolite molecular sieve 52. The second zeolite molecular sieve 52 can slide within the groove 54, allowing it to insert into the first zeolite molecular sieve 51 and partially overlap radially with it. The first zeolite molecular sieve 51 and the second zeolite molecular sieve 52 together form a fan-shaped structure. Before the fan-shaped zeolite sheet 5 reaches the section of the rack 73, the second zeolite molecular sieve 52 moves towards the rotating shaft 91 within the groove 54, causing it to detach from the inner wall of the first arc plate 65. During rotation, it is not affected by the jamming of the first arc plate 65.

[0067] Specifically, the first zeolite molecular sieve 51 is provided with a support frame 55 on the outside to ensure the stability of the first zeolite molecular sieve 51.

[0068] Furthermore, to enable the second zeolite molecular sieve 52 to move towards the rotating shaft 91 within the groove 54, a pressing component 8 is radially arranged between the second zeolite molecular sieve 52 and the first zeolite molecular sieve 51. The pressing component 8 includes a fixed shaft 81 and a second arc-shaped plate 85. The fixed shaft 81 passes through the sliding part and is fixedly connected to the second zeolite molecular sieve 52. A spring 82 is sleeved on the outside of the fixed shaft 81, and a baffle 83 is sleeved on the upper part of the fixed shaft 81, so that the spring 82 is located between the baffle 83 and the first gear 72. The second arc-shaped plate 85 is located at the top of the fixed shaft 81. The side of the second arc-shaped plate 85 near the fixed shaft 81 is divided into a first arc-shaped part 851 and a second arc-shaped part 852 with different heights, wherein the second arc-shaped part 852 and the rack 73 are connected. The section position corresponds to the section of the rack 73, and its length is greater than the section of the rack 73. Before the fan-shaped zeolite sheet 5 reaches the section of the rack 73, the second arc-shaped part 852 applies pressure to the fixed shaft 81, causing the spring 82 to contract. The fixed shaft 81 pushes the second zeolite molecular sieve 52 to move towards the rotating shaft 91 in the groove 54 to detach from the inner wall of the first arc-shaped plate 65. In the non-rotating section, the spring 82 extends to make the second zeolite molecular sieve 52 adhere to the inner wall of the first arc-shaped plate 65 again for adsorption and filtration.

[0069] Preferably, the top end of the fixed shaft 81 is a ball bearing structure, which facilitates the sliding of the fixed shaft 81 along the second arc-shaped plate 85.

[0070] Specifically, in order to enable the fixed shaft 3 81 to push the second zeolite molecular sieve 52, the fixed shaft 1 63 passes through the second zeolite molecular sieve 52 and is fixedly connected to the first zeolite molecular sieve 51. The fixed shaft 1 63 and the second zeolite molecular sieve 52 are in clearance fit. The lower end of the fixed shaft 3 81 is fixedly connected to the fixed claw plate 84. The fixed shaft 1 63 is provided with a through groove 631 that cooperates with the fixed claw plate 84. The fixed claw plate 84 passes through the through groove 631 and is fixedly connected to the second zeolite molecular sieve 52. The fixed claw plate 84 can slide in the through groove 631.

[0071] Please refer to Figure 12 To facilitate the axial movement of the fan-shaped zeolite sheet 5 along the rotating shaft 91 and its rotation around the fixed shaft 63, a slider 56 is provided in the middle of the lower surface of the first zeolite molecular sieve 51. The slider 56 is rotatably connected to the first zeolite molecular sieve 51 through a pin 53. The rotatable connection ensures that the slider 56 will not affect the rotation of the fan-shaped zeolite sheet 5. A slide rail 911 is provided on the rotating shaft 91 along the axial direction to cooperate with the slider 56. The slider 56 slides on the slide rail 911 to make the fan-shaped zeolite sheet 5 move axially along the rotating shaft 91.

[0072] Preferably, the connection between the fan-shaped zeolite sheet 5 and the slider 56 is provided with a rubber pad, so that the fan-shaped zeolite sheet 5 can maintain a fixed lateral position when the toothed rack 73 is not in action.

[0073] Please refer to Figure 3 and Figure 4To achieve the rotation of the zeolite rotor, i.e. the rotation of the shaft 91, a drive assembly is provided on one side of the shaft 91 to drive its rotation. The drive assembly includes support blocks 92 on both sides of the shaft 91. The central shaft of the shaft 91 is rotatably connected to the support blocks 92. One of the central shafts passes through the support blocks 92 and is externally fixedly sleeved with a second gear 93. The second gear 93 is externally meshed with a third gear 94. A motor 95 capable of driving the third gear 94 to rotate is installed on the outer casing 3. The diameter of the second gear 93 is much larger than the diameter of the third gear 94. The motor 95 drives the third gear 94 to rotate, thereby causing the second gear 93 to rotate, so as to reduce the rotation speed of the zeolite rotor and facilitate the saturation adsorption of VOCs waste gas by the fan-shaped zeolite plates 5.

[0074] In operation, motor 95 drives the third gear 94 to rotate, generating a meshing force with the second gear 93, which in turn drives the rotating shaft 91 to rotate the zeolite rotor. Simultaneously, the pre-treated VOCs waste gas enters the adsorption zone 10 through the inlet pipe 1 and is adsorbed by the fan-shaped zeolite plates 5. The purified gas is then discharged through the exhaust pipe 2. In the adsorption zone 10, the sliding part slides along the first arc-shaped groove 611, causing the multiple fan-shaped zeolite plates 5 of the zeolite rotor to be closely arranged, achieving effective filtration. After the fan-shaped zeolite plates 5 in the adsorption zone 10 gradually become saturated, the rotor rotates into the desorption zone 11. At this time, two adjacent sliding parts slide along two separate tracks, causing the zeolite rotor located in the desorption zone 11 to rotate. Multiple fan-shaped zeolite sheets 5 are separated and interleaved. High-temperature gas enters the desorption zone 11 through the hot air inlet pipe 31, creating a high-temperature environment inside the desorption zone 11. This causes VOCs to detach from the fan-shaped zeolite sheets 5 and be discharged through the hot air outlet pipe 32 with the hot air flow. The desorbed fan-shaped zeolite sheets 5 rotate into the cooling zone 12. Similarly, two adjacent sliding parts slide along two separate tracks, causing the multiple fan-shaped zeolite sheets 5 in the cooling zone 12 to separate and interleave. Room temperature clean air enters the cooling zone 12 through the cooling air inlet pipe 33, lowering the temperature of the fan-shaped zeolite sheets 5 to restore their adsorption capacity. They then rotate again into the adsorption zone 10 to begin the next round of adsorption. The separated and interleaved arrangement increases the contact area between the fan-shaped zeolite sheets 5 and the hot and cooling air, which is beneficial for achieving efficient desorption and cooling.

[0075] During the desorption and cooling stages, such as Figure 13 Here, taking a zeolite rotor composed of thirty-two fan-shaped zeolite plates 5 as an example, the positional changes of two adjacent fan-shaped zeolite plates 5 during the desorption and cooling stages are described:

[0076] State 1, such as Figure 13 In state (A), after the first fan-shaped zeolite sheet 5 is saturated in the adsorption zone 10, it rotates to the connection between the first arc-shaped groove 611 and the first branch groove 612. At this time, the first fan-shaped zeolite sheet 5 is completely in the desorption zone 11.

[0077] State 2, such as Figure 13In state (B), the rotating shaft 91 rotates 11.25° in the forward direction. At this time, the moving guide block 62 on the first fan-shaped zeolite plate 5 engages with one of the inclined surfaces of the fixed guide block. The first fan-shaped zeolite plate 5 moves along one of the inclined surfaces of the fixed guide block, passes through the first branch groove 612, and enters the second arc groove 613 of the single-track system. This achieves the separation and interleaving of the first fan-shaped zeolite plate 5 and the second fan-shaped zeolite plate 5, increasing the contact area between the first fan-shaped zeolite plate 5 and the hot air, which is conducive to achieving efficient desorption. During the rotation in the second arc groove 613, the rack 73 meshes with the first gear 72 on the first fan-shaped zeolite plate 5, driving the first fan-shaped zeolite plate 5 to rotate 180 degrees, causing the fan-shaped zeolite plate 5 to flip. After flipping, the adsorption surface of the fan-shaped zeolite plate 5 faces the air inlet pipe 1, ensuring that the adsorption surfaces on both sides can be fully utilized. At this time, the moving guide block 62 of the second fan-shaped zeolite plate 5 is located at the connection between the first arc groove 611 and the first branch groove 612.

[0078] State 3, such as Figure 13 In state (C), the rotating shaft 91 rotates 22.5° in the forward direction. At this time, the moving guide block 62 on the second fan-shaped zeolite plate 5 engages with another inclined surface of the fixed guide block. The second fan-shaped zeolite plate 5 moves along one inclined surface of the fixed guide block, passes through the first branch groove 612, and enters the second arc groove 613 of another single-path track. During the rotation in the second arc groove 613, the rack 73 meshes with the first gear 72 on the second fan-shaped zeolite plate 5, driving the second fan-shaped zeolite plate 5 to rotate 180 degrees, causing the fan-shaped zeolite plate 5 to flip. At this time, the first fan-shaped zeolite plate 5 moves to the connection between the second branch groove 614 and the third arc groove 615, so that the first fan-shaped zeolite plate 5 returns to the parallel state before passing through the boundary area of ​​the desorption zone 11 and the cooling zone 12, avoiding the staggered arrangement of the fan-shaped zeolite plates 5 from affecting the sealing between the zones.

[0079] State 4, such as Figure 13 In state (D), the shaft 91 rotates 11.25° in the forward direction, and the second fan-shaped zeolite plate 5 moves to the connection between the second branch groove 614 and the third arc groove 615, so that it returns to the parallel state. At this time, the first fan-shaped zeolite plate 5 completely enters the cooling zone 12, and the first fan-shaped zeolite plate 5 and the second fan-shaped zeolite plate 5 complete the desorption work in the desorption zone 11.

[0080] As the shaft 91 continues to rotate, the first fan-shaped zeolite sheet 5, under the action of the fixed guide block and the two-way guide rails in the cooling zone 12, separates and intersects with the second fan-shaped zeolite sheet 5 again, and the specific process is the same as above.

[0081] On the other hand, the present invention also provides a method for adsorbing and desorbing VOCs waste gas using zeolite molecular sieves, comprising the following steps:

[0082] During the adsorption stage, the drive component drives the zeolite rotor to rotate slowly. The pretreated VOCs waste gas is introduced into the adsorption zone 10 and adsorbed by the fan-shaped zeolite sheet 5. The purified gas is discharged through the exhaust pipe 2.

[0083] During the desorption stage, after the fan-shaped zeolite sheets 5 in the adsorption zone 10 gradually become saturated, they rotate into the desorption zone 11. The high-temperature environment causes VOCs to detach from the fan-shaped zeolite sheets 5 and be discharged with the hot air flow.

[0084] During the cooling stage, the desorbed fan-shaped zeolite flakes 5 rotate into the cooling zone 12, where they come into contact with clean air at room temperature to lower the temperature and restore their adsorption capacity. They then rotate again into the adsorption zone 10 to begin the next round of adsorption.

[0085] The guide groove 61 controls two adjacent fan-shaped zeolite plates 5 to stagger along the axial direction of the zeolite rotor when they are located in the desorption zone 11 and the cooling zone 12, thereby increasing the contact area between the fan-shaped zeolite plates 5 and the hot and cooling air, which is conducive to achieving efficient desorption and cooling.

[0086] It should be noted that, in this document, relational 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 such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0087] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A treatment device for VOCs waste gas adsorption and desorption using zeolite molecular sieves, comprising a shell (3), wherein the interior of the shell (3) is divided into an adsorption zone (10), a desorption zone (11), and a cooling zone (12), characterized in that, Also includes: Fan-shaped zeolite pieces (5) are placed inside the outer shell (3), and multiple fan-shaped zeolite pieces (5) are spliced ​​together to form a circular zeolite wheel; A rotating shaft (91) is located in the middle of the zeolite wheel and drives the zeolite wheel to rotate. The fan-shaped zeolite pieces (5) can move axially on the rotating shaft (91). The sliding part, the guide groove (61), and the first arc plate (65) are installed at the end of the fan-shaped zeolite sheet (5) away from the rotating shaft (91). The first arc plate (65) is fixed inside the outer shell (3). The guide groove (61) is located on the first arc plate (65). When the fan-shaped zeolite sheet (5) rotates synchronously with the rotating shaft (91), the guide groove (61) controls the two adjacent sliding parts to stagger along the axial direction of the zeolite wheel when they are located in the desorption zone (11) and the cooling zone (12). The guide groove (61) includes: The first arc-shaped groove (611) is located on the first arc-shaped plate (65) in the area opposite to the adsorption area (10); The third arc-shaped groove (615) is located in the area at the junction of the desorption zone (11) and the cooling zone (12) on the first arc-shaped plate (65); Two separate tracks are provided between the third arc groove (615) and the first arc groove (611) so that the sliding part alternates between the desorption zone (11) and the cooling zone (12); The single-track branch includes a first branch groove (612) located at the inlet end of the desorption zone (11) and the cooling zone (12) and a second branch groove (614) located at the outlet end of the desorption zone (11) and the cooling zone (12), and a second arc groove (613) for connecting the first branch groove (612) and the second branch groove (614). A fixed guide block is provided on the area of ​​the first arc plate (65) opposite to the first branch groove (612), and the fixed guide block is provided with two inclined surfaces with the same deflection angle as the first branch groove (612). The sliding part includes a fixed shaft (63), and after the upper end of the fixed shaft (63) passes through the guide groove (61), a movable guide block (62) is fixedly sleeved on it. The movable guide block (62) has a structure with an inclined surface. The inclined surfaces of the movable guide blocks (62) on two adjacent fan-shaped zeolite sheets (5) are opposite in direction and respectively cooperate with the two inclined surfaces of the fixed guide block. Also includes: A second connecting shaft (71) is located at one end of the fan-shaped zeolite sheet (5) away from the rotating shaft (91). A first gear (72) is installed on the second connecting shaft (71). A rack (73) is provided in a section of the guide groove (61) located between the desorption zone (11) and the cooling zone (12). The first gear (72) rotates 180 degrees when passing the rack (73) so that the fan-shaped zeolite sheet (5) flips over.

2. The zeolite molecular sieve adsorption-desorption VOCs waste gas treatment device according to claim 1, characterized in that, The fan-shaped zeolite sheet (5) includes a first zeolite molecular sieve (51) and a second zeolite molecular sieve (52) located at the end of the first zeolite molecular sieve (51) away from the rotating shaft (91). The second zeolite molecular sieve (52) and the first zeolite molecular sieve (51) are radially partially overlapped. The second zeolite molecular sieve (52) and the first zeolite molecular sieve (51) are radially provided with a pressing component (8). The pressing component (8) can apply pressure to the second zeolite molecular sieve (52) when the fan-shaped zeolite sheet (5) reaches the section of the rack (73), so that the second zeolite molecular sieve (52) is separated from the inner wall of the first arc plate (65).

3. The treatment device for VOCs waste gas adsorption and desorption by zeolite molecular sieve according to claim 2, characterized in that, The pressing component (8) includes: Fixed shaft three (81) passes through the sliding part and is fixedly connected to the second zeolite molecular sieve (52). A spring (82) is sleeved on the outside of the fixed shaft three (81). The second arc plate (85) is located at the top of the fixed shaft three (81). The side of the second arc plate (85) near the fixed shaft three (81) is divided into a first arc section (851) and a second arc section (852) with different heights. The second arc section (852) corresponds to the section position of the rack (73). The second arc section (852) can apply pressure to the fixed shaft three (81) to cause the spring (82) to contract.

4. The treatment device for VOCs waste gas adsorption and desorption by zeolite molecular sieve according to claim 2, characterized in that, A slider (56) is provided in the middle of the lower surface of the first zeolite molecular sieve (51), and the slider (56) is rotatably connected to the first zeolite molecular sieve (51) through a pin (53); The rotating shaft (91) is provided with a slide rail (911) along the axial direction to cooperate with the slider (56), and a drive component is provided on one side of the rotating shaft (91) to drive it to rotate.

5. The treatment device for VOCs waste gas adsorption and desorption by zeolite molecular sieve according to claim 1, characterized in that, The zeolite rotor is provided with inclined baffle one (41), inclined baffle two (42), longitudinal baffle (43) and transverse baffle (44) on both sides, which form a sealed desorption zone (11) and cooling zone (12) with the outer shell (3). A transition groove is formed between the two corresponding inclined baffles (41), inclined baffles (42), and longitudinal baffles (43), which can accommodate a single fan-shaped zeolite piece (5) to pass through. A cavity is formed between the two corresponding transverse baffles (44), which can accommodate the fan-shaped zeolite pieces (5) to be staggered along the axial direction of the zeolite wheel.

6. The treatment device for VOCs waste gas adsorption and desorption by zeolite molecular sieve according to claim 1, characterized in that, The outer shell (3) is provided with an air inlet pipe (1) and an exhaust pipe (2) on both sides, and the air inlet pipe (1) and the exhaust pipe (2) are connected to the adsorption area (10); The upper part of the outer shell (3) is provided with a hot air inlet pipe (31), a hot air outlet pipe (32), a cooling air inlet pipe (33) and a normal temperature air outlet pipe (34). The hot air inlet pipe (31) and the hot air outlet pipe (32) are connected to the desorption zone (11), and the cooling air inlet pipe (33) and the normal temperature air outlet pipe (34) are connected to the cooling zone (12).

7. A method for adsorbing and desorbing VOCs waste gas using zeolite molecular sieves, applicable to the treatment device for adsorbing and desorbing VOCs waste gas using zeolite molecular sieves as described in any one of claims 1-6, characterized in that, Includes the following steps: During the adsorption stage, the zeolite rotor rotates slowly, and the pretreated VOCs waste gas is introduced into the adsorption zone (10) and adsorbed by the fan-shaped zeolite sheets (5). The purified gas is discharged through the exhaust pipe (2). During the desorption stage, after the fan-shaped zeolite sheets (5) in the adsorption zone (10) gradually become saturated, they rotate into the desorption zone (11). The high-temperature environment causes VOCs to detach from the fan-shaped zeolite sheets (5) and be discharged with the hot air flow. During the cooling stage, the desorbed fan-shaped zeolite flakes (5) rotate into the cooling zone (12), come into contact with clean air at room temperature to lower the temperature and restore the adsorption capacity, and then rotate into the adsorption zone (10) to start the next round of adsorption. The guide groove (61) controls the two adjacent fan-shaped zeolite plates (5) to stagger along the axial direction of the zeolite wheel when they are located in the desorption zone (11) and the cooling zone (12), thereby increasing the contact area between the fan-shaped zeolite plates (5) and the hot and cooling air, which is conducive to achieving efficient desorption and cooling.

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