VOCs purification device based on enrichment catalysis coupling microwave integrated technology

Abstract

The invention relates to a VOCs purification device based on an enrichment catalysis coupling microwave integrated technology, the VOCs purification device comprises an air inlet, a flip slide bar device and an overall shell, the lower part of the flip slide bar device is connected with the overall shell, and the upper part of the flip slide bar device is connected with the air inlet; a supporting frame is arranged at the bottom end in the overall shell, a stepping motor is arranged in a square groove position in the bottom of the supporting frame, and a three-rotation gear disc oil seal mechanism is arranged in a circular groove position in the top of the supporting frame. A thrust bearing is further arranged in the overall shell, and a rotating wheel cavity is formed above the thrust bearing. The upper part of the runner cavity is connected with a clean gas pipeline; the lower part of the base is connected with a three-spin gear disc oil seal mechanism; a microwave resonance shell is fixedly connected to the side face of the overall shell, and a microwave emission box is arranged on the microwave resonance shell. And a paint mist filter is arranged above the clean gas pipeline in the overall shell. Compared with the prior art, the device has the advantages that industrial waste gas can be directly absorbed, and purification of VOCs is completed under automatic control.

Description

Technical Field

[0001] The present invention relates to the technical field of VOCs treatment of industrial waste gas, and in particular to a VOCs purification device based on enrichment catalysis coupled microwave integrated technology. Background Art

[0002] With rapid economic development, the pollution problem of volatile organic compounds (VOCs) in industrial waste gas has become increasingly prominent, causing serious impacts on the environment and human health. VOCs not only cause environmental problems such as photochemical smog and acid rain, but can also lead to health problems such as respiratory diseases and cancer. Therefore, the control of VOCs in industrial waste gas has become an urgent social need.

[0003] Currently, a variety of technologies are available for VOC treatment in industrial waste gas, including combustion, combined adsorption-desorption, and condensation recovery. While direct combustion and regenerative thermal oxidation (RTO) technologies offer high purification efficiency, they also suffer from high energy consumption and the potential generation of secondary pollutants (such as SOx and NOx). Combined adsorption-desorption technologies (such as activated carbon adsorption and catalytic combustion) offer high removal rates, but the activated carbon is easily saturated, leading to high replacement costs. Furthermore, these technologies suffer from complex equipment, difficult operation, and high operating costs in practical applications.

[0004] Therefore, in response to the above problems, it is urgent to develop an efficient, low-energy, and low-cost industrial waste gas VOCs treatment device. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a VOCs purification device based on enrichment catalysis coupled microwave integrated technology.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A VOCs purification device based on enrichment catalytic coupled microwave integrated technology, the purification device includes an air inlet, a flip slide device and an overall shell; the flip slide device is connected to the overall shell at the bottom and to the air inlet at the top; a support frame is provided at the bottom end of the overall shell; a stepper motor is provided in the square slot at the bottom of the support frame, and a three-rotation gear disc oil seal mechanism is provided in the circular slot at the top, and the rotating end of the stepper motor is connected to the three-rotation gear disc oil seal mechanism; a thrust bearing is also provided inside the overall shell, and a runner cavity is provided above the thrust bearing; the runner cavity is connected to the clean gas pipeline above, and the three-rotation gear disc oil seal mechanism is connected below the base; a microwave resonant shell is fixedly connected to the side of the overall shell; a microwave transmitting box is provided on the microwave resonant shell; a paint mist filter is provided in the overall shell above the clean gas pipeline.

[0007] Furthermore, the paint mist filter has a four-layer stacked structure, and the bottom layer of the paint mist filter is supported by an annular protrusion a provided inside the overall shell.

[0008] Furthermore, the microwave resonant shell is composed of a fan-ring flat plate and a cylindrical surface; a microwave hole is provided at the center of the cylindrical surface of the microwave resonant shell; and the microwave transmitting box is connected and fixed at the microwave hole of the microwave resonant shell.

[0009] Furthermore, an air inlet grille is provided on the left side of the interior of the microwave transmitting box, a magnetron is connected to the interior of the back, two parallel cooling fans are connected to the interior of the right side, and a transformer and a capacitor are placed on the inner side of the bottom; the curved structure on the left side of the microwave transmitting box is hollow and open at the end; the space on the right side of the microwave transmitting box where the cooling fan is placed bulges outward and is provided with dense holes.

[0010] Furthermore, the thrust bearing is placed on the annular protrusion b provided inside the overall outer shell; the runner cavity is composed of an inner cylinder, three rectangular plates, an outer cylinder and a base with an annular protrusion, forming three fan-shaped cylindrical chambers, which are respectively the adsorption zone, the cooling zone and the desorption zone; the runner cavity is provided with an annular protrusion d, which is embedded with the inner ring of the thrust bearing to ensure a stable connection; three zeolite molecular sieves are placed above the inner base of the outer cylinder of the runner cavity, and an annular protrusion c is provided on the inner side of the inner cylinder of the runner cavity for carrying the CO2 catalyst; the inner cylinder of the runner cavity is provided with three air outlets connecting all the chambers of the runner cavity.

[0011] Furthermore, the three-rotation gear disc oil seal mechanism includes a disc, a crank, a driven gear, a driven gear shaft, an oil seal housing, a driving gear, a retaining frame and a driving gear shaft; the oil seal housing is placed above the support frame, and the three driven gear shafts and a single driving gear shaft all pass through the oil seal housing. The three driven gear shafts are arranged circumferentially with the driving gear shaft as the central axis, and the driving gear shaft is located on the symmetry axis of the oil seal housing. The lower end of the driving gear shaft is connected to the stepper motor, the driving gear is installed in the middle section of the driving gear shaft, and the driven gear is installed in the middle section of the driven gear shaft. The driving gear and the driven gear are meshed and connected, the crank is installed at the upper end of the driven gear shaft, and a retaining frame is installed on the bottom surface of the oil seal housing, and the driving gear shaft and the driven gear shaft are both embedded in the retaining frame; the disc is connected below the base of the runner cavity; a wheel groove is provided in the disc, and the cylindrical protrusion of the crank will contact the wheel groove of the disc during movement.

[0012] Furthermore, the clean gas pipeline is a hollow pipe with a variable diameter bend; the thick end of the clean gas pipeline is connected to the rotor cavity below, and the thin end of the clean gas pipeline penetrates the overall shell and is embedded and fixed therewith; the thin end of the clean gas pipeline is connected to a negative pressure fan.

[0013] Furthermore, the microwave resonant shell is made of all-metal material; the outer cylinder of the rotor cavity is made of non-metal material, and other parts of the rotor cavity except the outer cylinder are all made of metal material.

[0014] Furthermore, the clean gas pipeline is airtightly connected to the runner chamber.

[0015] Compared with the prior art, the present invention has the following advantages: (1) The purification device of the present invention adopts the enrichment-catalysis coupled microwave integrated technology, which can not only remove VOCs in the exhaust gas efficiently and quickly, but also significantly reduce the energy consumption and operating costs of the equipment; it can efficiently concentrate VOCs in the exhaust gas through the cyclic working mode of the three-zone rotary concentrator and the excellent adsorption performance of the zeolite molecular sieve, and at the same time use the high efficiency characteristics of microwave heating to quickly achieve desorption and regeneration, which significantly shortens the desorption time and reduces energy consumption compared with traditional heating methods; at the same time, the device has a high degree of automation, and data is fed back to the mobile phone app in real time. It is easy to operate and maintain, which further reduces the operation and maintenance costs.

[0016] (2) The purification device of the present invention adopts an integrated and simplified design, which makes its structure compact and occupies a small area, easy to move and disperse, while reducing the complexity of the equipment and operating costs. In addition, the carefully designed transmission and support structures such as thrust bearings and three-rotation gear disc oil seal mechanisms ensure the smooth operation and long-term stability of the equipment.

[0017] (3) In terms of environmental protection, the present invention uses microwave heating to avoid secondary pollution caused by the combustion of fossil fuels. The entire purification process is carried out in a closed manner, effectively preventing waste gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-section structure of the overall shell of the purification device provided by the present invention; Figure 2 This is a schematic diagram of the full cross-section structure of the purification device provided by the present invention; Figure 3 A schematic diagram of the structure of the three-rotation gear disc oil seal mechanism provided by the present invention; Figure 4 A schematic structural diagram of the microwave transmitting box provided by the present invention; Figure 5 This is a schematic diagram of the runner cavity structure provided by the present invention.

[0019] The numbers in the figure indicate: 1. Air inlet; 2. Flip-top slide bar device; 3. Paint mist filter; 4. Clean gas pipeline; 5. Negative pressure fan; 6. Zeolite molecular sieve; 7. Microwave resonant shell; 701. Microwave hole; 8. Overall shell; 801. Annular protrusion a; 802. Annular protrusion b; 9. Microwave launch box; 901. Air inlet grid; 902. Magnetron; 903. Cooling fan; 904. Transformer; 905. Capacitor; 10. Rotor cavity; 101. Adsorption zone; 1 02. Cooling zone; 103. Desorption zone; 104. Annular protrusion c; 105. Air outlet; 106. Annular protrusion d; 11. Three-rotation gear disc oil seal mechanism; 111. Disc; 112. Crank; 113. Driven gear; 114. Driven gear shaft; 115. Oil seal housing; 116. Driving gear; 117. Retaining rack; 118. Driving gear shaft; 12. Thrust bearing; 13. Support frame; 14. Stepper motor; 15. CO2 catalyst. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention. Example

[0022] like Figures 1 to 5As shown, a VOCs purification device based on enrichment catalytic coupled microwave integrated technology, the purification device includes an air inlet 1, a flip slide device 2 and an overall shell 8; the flip slide device 2 is connected to the overall shell 8 at the bottom and to the air inlet 1 at the top, and can be flipped open or closed; a support frame 13 is provided at the bottom end of the overall shell 8; a stepping motor 14 is provided in the square slot at the bottom of the support frame 13, and a three-rotation gear disc oil seal mechanism 11 is provided in the circular slot at the top, and the rotating end of the stepping motor 14 is connected to the three-rotation gear disc oil seal mechanism 11; a thrust bearing 12 is also provided inside the overall shell 8, and a runner cavity 10 is provided above the thrust bearing 12; the runner cavity 10 is connected to the clean gas pipeline 4 at the top, and the three-rotation gear disc oil seal mechanism 11 is connected to the bottom of the base; a microwave resonant shell 7 is fixedly connected to the side of the overall shell 8; a microwave transmitting box 9 is provided on the microwave resonant shell 7; a paint mist filter 3 is provided in the overall shell 8 above the clean gas pipeline 4.

[0023] The paint mist filter 3 is a four-layer stacked structure, and the bottom layer of the paint mist filter 3 is supported by the annular protrusion a 801 provided inside the overall housing 8.

[0024] The microwave resonant shell 7 is made of all-metal material and consists of a fan-ring flat plate and a cylindrical surface; a microwave hole 701 is provided at the center of the cylindrical surface of the microwave resonant shell 7; and the microwave transmitting box 9 is connected and fixed at the microwave hole 701 of the microwave resonant shell 7.

[0025] An air inlet grille 901 is provided on the left side of the microwave transmitting box 9, a magnetron 902 is connected to the inside of the back, two parallel cooling fans 903 are connected to the inside of the right side, and a transformer 904 and a capacitor 905 are placed on the inside of the bottom surface; the curved structure on the left side of the microwave transmitting box 9 is hollow and open at the end; the space on the right side of the microwave transmitting box 9 where the cooling fan 903 is placed bulges outward and is provided with dense holes.

[0026] The thrust bearing 12 is placed on the annular protrusion b 802 provided inside the overall shell 8; the runner chamber 10 is composed of an inner cylinder, three rectangular plates, an outer cylinder and a base with an annular protrusion, forming three fan-shaped cylindrical chambers, namely the adsorption zone 101, the cooling zone 102 and the desorption zone 103; the outer cylinder of the runner chamber 10 is made of non-metallic material, and the other parts of the runner chamber 10 except the outer cylinder are all made of metal; the runner chamber 10 is provided with an annular protrusion d 106, which is embedded with the inner ring of the thrust bearing 12 to ensure a stable connection; three zeolite molecular sieves 6 are placed above the inner base of the outer cylinder of the runner chamber 10, and an annular protrusion c 104 is provided on the inner side of the inner cylinder of the runner chamber 10 for carrying the CO2 catalyst 15; the inner cylinder of the runner chamber 10 is provided with three air vents 105 connecting all the chambers of the runner chamber 10.

[0027] The three-rotation gear disc oil seal mechanism 11 includes a disc 111, a crank 112, a driven gear 113, a driven gear shaft 114, an oil seal housing 115, a driving gear 116, a retaining frame 117 and a driving gear shaft 118; the oil seal housing 115 is placed above the support frame 13, the three driven gear shafts 114 and the single driving gear shaft 118 all pass through the oil seal housing 115, the three driven gear shafts 114 are arranged in a circle with the driving gear shaft 118 as the central axis, the driving gear shaft 118 is located on the symmetrical axis of the oil seal housing 115, and the lower end of the driving gear shaft 118 is aligned with the stepping motor. 14 is connected, a driving gear 116 is installed in the middle section of the driving gear shaft 118, and a driven gear 113 is installed in the middle section of the driven gear shaft 114. The driving gear 116 is meshed with the driven gear 113. The upper end of the driven gear shaft 114 is installed with a crank 112. A retaining frame 117 is installed on the bottom surface of the oil seal housing 115. The driving gear shaft 118 and the driven gear shaft 114 are both embedded in the retaining frame 117; the bottom of the base of the runner cavity 10 is connected to a disc 111; a wheel groove is provided in the disc 111, and the cylindrical protrusion of the crank 112 will contact the wheel groove of the disc 111 during movement.

[0028] The clean gas pipeline 4 is a hollow pipe with a variable diameter bend; the thick end of the clean gas pipeline 4 is connected to the lower rotor cavity 10, and the thin end of the clean gas pipeline 4 penetrates the overall shell 8 and is embedded and fixed therewith; the thin end of the clean gas pipeline 4 is connected to the negative pressure fan 5; the clean gas pipeline 4 and the rotor cavity 10 are airtightly connected.

[0029] The purification device of the present invention is connected to a control system for controlling the operation of the negative pressure blower 5 , the microwave emission box 9 and the stepping motor 14 .

[0030] The working principle of the present invention is: First, the organic waste gas containing VOCs molecules enters the purification device from the air inlet 1 at the top of the device. The waste gas will pass through the four-layer paint mist filter 3 to filter out solid impurities such as paint mist particles, heavy metal particles and dust. The filtered organic waste gas no longer contains solid impurities.

[0031] The filtered exhaust gas enters the rotor cavity 10 from top to bottom. Its three cylindrical chambers (adsorption zone 101, desorption zone 103, and cooling zone 102) are each filled with zeolite molecular sieve 6, which is used to adsorb VOC molecules. Because the desorption zone 103 is partially enclosed by the microwave resonant shell 7, gas cannot enter. Therefore, the VOC molecules in the exhaust gas are primarily adsorbed by the zeolite molecular sieve 6 in the adsorption zone 101 and cooling zone 102.

[0032] After a certain period of time, when the VOC molecules within desorption zone 103 are automatically calculated to be essentially purified, the control system controls the stepper motor 14 to rotate one revolution. Driven by the three-rotation gear disc oil seal mechanism 11, the rotor cavity 10 rotates 120° counterclockwise. After this rotation: adsorption zone 101 → desorption zone 103; desorption zone 103 → cooling zone 102; cooling zone 102 → adsorption zone 101. The spatial positions of the three working zones remain unchanged; the three cavities of the rotating rotor cavity 10 simply adapt to the respective working zones. The original adsorption zone 101, carrying a large amount of concentrated VOCs, enters the microwave resonant shell 7. Over time, the VOCs are gradually desorbed and regenerated under the combined effects of microwave heating and the catalyst. The original cooling zone 102 moves to the position of adsorption zone 101, continuing to adsorb VOCs. The original desorption zone 103 moves to the position of cooling zone 102, dissipating heat while maintaining a certain level of adsorption efficiency. During the short-time rotation of the wheel cavity 10, the control system will suspend the operation of the microwave emission box 9 to avoid microwave leakage.

[0033] At the same time, the cleaner gas passing through the zeolite molecular sieve 6 reaches the bottom of the rotor chamber 10. Under the action of the negative pressure blower 5, the gas is guided through the bottom air port 105 into the pipe in the middle of the rotor chamber 10, and then passes through the CO2 catalyst 15 from bottom to top to obtain the final clean gas, which is released to the outside through the clean exhaust pipe 4.

[0034] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A VOCs purification device based on enrichment catalysis coupled microwave integrated technology, characterized in that: The purification device comprises an air inlet (1), a flip-up slide rod device (2) and an overall housing (8); the flip-up slide rod device (2) is connected to the overall housing (8) at the bottom and connected to the air inlet (1) at the top; a support frame (13) is provided at the bottom end of the overall housing (8); a stepper motor (14) is provided at the square slot at the bottom of the support frame (13), and a three-rotation gear disc oil seal mechanism (11) is provided at the circular slot at the top; the rotating end of the stepper motor (14) is connected to the three-rotation gear disc oil seal mechanism (11); A thrust bearing (12) is further provided inside the overall housing (8), and a runner cavity (10) is provided above the thrust bearing (12); the runner cavity (10) is connected to the clean gas pipeline (4) above, and the bottom of the base is connected to a three-rotation gear disc oil seal mechanism (11); a microwave resonant shell (7) is fixedly connected to the side of the overall housing (8); a microwave transmitting box (9) is provided on the microwave resonant shell (7); and a paint mist filter (3) is provided above the clean gas pipeline (4) in the overall housing (8).

2. A VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1, characterized in that: The paint mist filter (3) has a four-layer stacked structure, and the bottom layer of the paint mist filter (3) is supported by an annular protrusion a (801) provided inside the overall housing (8).

3. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1 is characterized in that: The microwave resonant shell (7) is composed of a fan-shaped flat plate and a cylindrical surface; a microwave hole (701) is provided at the center of the cylindrical surface of the microwave resonant shell (7); and the microwave transmitting box (9) is connected and fixed at the microwave hole (701) of the microwave resonant shell (7).

4. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1 is characterized in that: The microwave transmitting box (9) is provided with an air inlet grid (901) on the left side thereof, a magnetron (902) is connected to the inside of the back, two parallel cooling fans (903) are connected to the inside of the right side thereof, and a transformer (904) and a capacitor (905) are placed on the inside of the bottom surface; the curved structure on the left side of the microwave transmitting box (9) is hollow and has an open end; the space on the right side of the microwave transmitting box (9) where the cooling fan (903) is placed is convex outward and has dense holes.

5. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1 is characterized in that: The thrust bearing (12) is placed on the annular protrusion b (802) provided inside the overall housing (8); the runner chamber (10) is composed of an inner cylinder, three rectangular plates, an outer cylinder and a base with an annular protrusion, forming three fan-shaped cylindrical chambers, namely the adsorption zone (101), the cooling zone (102) and the desorption zone (103); the runner chamber (10) is provided with an annular protrusion d (106), which is embedded with the inner ring of the thrust bearing (12) to ensure a stable connection; three zeolite molecular sieves (6) are placed above the inner base of the outer cylinder of the runner chamber (10), and an annular protrusion c (104) is provided on the inner side of the inner cylinder of the runner chamber (10) for carrying the CO2 catalyst (15); the inner cylinder of the runner chamber (10) is provided with three air vents (105) connecting all the chambers of the runner chamber (10).

6. A VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 5, characterized in that: The three-rotation gear disc oil seal mechanism (11) comprises a disc (111), a crank (112), a driven gear (113), a driven gear shaft (114), an oil seal housing (115), a driving gear (116), a retaining frame (117) and a driving gear shaft (118); the oil seal housing (115) is placed above the support frame (13); the three driven gear shafts (114) and the single driving gear shaft (118) all pass through the oil seal housing (115); the three driven gear shafts (114) are arranged in a circle with the driving gear shaft (118) as the central axis; the driving gear shaft (118) is located on the symmetrical axis of the oil seal housing (115); the lower end of the driving gear shaft (118) is aligned with the stepping motor. (14) is connected, the middle section of the driving gear shaft (118) is installed with the driving gear (116), the middle section of the driven gear shaft (114) is installed with the driven gear (113), the driving gear (116) and the driven gear (113) are meshed and connected, the upper end of the driven gear shaft (114) is installed with the crank (112), the bottom surface of the oil seal housing (115) is installed with the retaining frame (117), and the driving gear shaft (118) and the driven gear shaft (114) are both embedded in the retaining frame (117); the bottom of the base of the wheel cavity (10) is connected with the disc (111); the disc (111) is provided with a wheel groove, and the cylindrical protrusion of the crank (112) will contact the wheel groove of the disc (111) during movement.

7. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1 is characterized in that: The clean gas pipeline (4) is a hollow pipe with a variable diameter bend; the thick end of the clean gas pipeline (4) is connected to the lower rotor cavity (10), and the thin end of the clean gas pipeline (4) penetrates the overall shell (8) and is embedded and fixed thereto; the thin end of the clean gas pipeline (4) is connected to a negative pressure fan (5).

8. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 5 is characterized in that: The microwave resonant shell (7) is made of all-metal material; the outer cylinder of the wheel cavity (10) is made of non-metal material, and all parts of the wheel cavity (10) except the outer cylinder are made of metal material.

9. The VOCs purification device based on enrichment catalysis coupled microwave integrated technology according to claim 1 is characterized in that: The clean gas pipeline (4) and the runner chamber (10) are airtightly connected.

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