Device for purifying waste gas generated in preparation of watermelon ketone

Abstract

The invention relates to the technical field of industrial waste gas treatment, and discloses a watermelon ketone preparation waste gas purification device which comprises a support, an adsorption tower is fixedly connected to the inner side of the support, a motor is installed at the bottom of the adsorption tower, the output end of the motor is fixedly connected with a main rotating shaft, and a transmission mechanism is arranged at the top of the main rotating shaft. A rotary adsorption disc is arranged on the inner wall of the adsorption tower, the top of the rotary adsorption disc is detachably connected with a plurality of activated carbon adsorption boxes used for adsorbing waste gas generated by watermelon ketone preparation, the outer wall of a main rotating shaft is fixedly connected with a petal-shaped flow guide plate, a regeneration mechanism is arranged on the top of the petal-shaped flow guide plate, and a purging gas box is arranged outside the adsorption tower. According to the invention, through pure mechanical motion logic cooperation, automatic circulation of adsorption-regeneration is realized under the condition that the whole waste gas purification device does not stop, continuous operation of the device is ensured, the regeneration efficiency of activated carbon is improved, manual intervention is reduced, and the device is suitable for industrial continuous production scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas treatment, and particularly relates to a waste gas purification device for the preparation of watermelon ketone. Background Art

[0002] In the field of industrial waste gas treatment, activated carbon adsorption devices are the core equipment for realizing the purification of organic waste gas, and are widely used in continuous production scenarios such as chemical industry, spraying, and pharmaceutical manufacturing. These devices achieve purification through the adsorption of organic matter in the waste gas by activated carbon. However, after the activated carbon is saturated with adsorption, it needs to be regenerated to be reused. How to maintain the continuous operation of the equipment during the regeneration process to match the requirements of industrial continuous production has become a key technical difficulty.

[0003] Traditional activated carbon adsorption devices generally adopt a fixed-bed adsorption mode. When the activated carbon is saturated with adsorption, the whole device needs to be shut down and the adsorption unit needs to be replaced offline, or the fixed bed layer needs to be regenerated online. However, whether it is offline replacement or online regeneration, the waste gas treatment process needs to be interrupted - for offline replacement, the equipment needs to be paused to remove the saturated activated carbon, and during online regeneration, operations such as heating and purging will occupy the entire adsorption bed layer, resulting in the forced stagnation of the waste gas treatment process. This intermittent working mode of "adsorption - shutdown - regeneration" not only causes a decrease in production efficiency, but also the frequent start and stop will affect the stability of the equipment, and it is difficult to meet the requirements of industrial production with 24-hour continuous operation.

[0004] Therefore, in view of the above problems, a waste gas purification device for the preparation of watermelon ketone is proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present invention provides a waste gas purification device for the preparation of watermelon ketone, aiming to improve the problem that in the prior art, the regeneration or replacement of a traditional fixed-bed activated carbon adsorption device requires shutdown, resulting in the interruption of waste gas treatment and thus reducing the treatment efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A waste gas purification device for the preparation of watermelon ketone, comprising a bracket, an adsorption tower is fixedly connected to the inner side of the bracket, a motor is installed at the bottom of the adsorption tower, the output end of the motor is fixedly connected to a main rotating shaft, a transmission mechanism is arranged at the top of the main rotating shaft, a rotating adsorption disk is arranged on the inner wall of the adsorption tower, a plurality of activated carbon adsorption boxes for adsorbing the waste gas generated by the preparation of watermelon ketone are detachably connected to the top of the rotating adsorption disk, a petal-shaped guide plate is fixedly connected to the outer wall of the main rotating shaft, a regeneration mechanism is arranged at the top of the petal-shaped guide plate, and a purge gas box is arranged outside the adsorption tower;

[0008] The regeneration mechanism includes an arc-shaped top pile fixedly connected to the top of the petal-shaped deflector. Multiple semi-circular protrusions are provided on the top of the arc-shaped top pile. A dust collector is detachably connected inside the adsorption tower. A top column is slidably connected inside the dust collector. The bottom of the top column contacts the semi-circular protrusions. A connection disk is arranged on the outer side of the top column. A return spring is arranged between the connection disk and the bottom of the dust collector;

[0009] As a further description of the above technical solution:

[0010] The rotary adsorption disk includes a tapered roller bearing. The outer side of the tapered roller bearing is fixedly connected to the inner side of the adsorption tower. The inner side of the tapered roller bearing is rotatably connected to an installation disk. Multiple dovetail grooves are formed inside the installation disk. A U-shaped chuck is arranged in the middle of the dovetail groove;

[0011] As a further description of the above technical solution:

[0012] The activated carbon adsorption box includes a box body. The outer side of the box body is detachably connected inside the dovetail groove, and the bottom of the box body contacts the top of the top column. The outer side of the box body contacts the inner side of the U-shaped chuck. Multiple ventilation holes are formed inside the box body. Multiple spiral drainage grooves are formed inside the ventilation holes. A sealing gasket is arranged on the outer side of the bottom of the box body;

[0013] As a further description of the above technical solution:

[0014] The transmission mechanism includes a driving wheel. The bottom of the driving wheel is fixedly connected to the top of the main rotating shaft. A support arm is fixedly connected to the inner wall of the adsorption tower. The other end of the support arm is rotatably connected to a driven wheel. The driving wheel meshes with the driven wheel. A dial is fixedly connected to the top of the driven wheel. A cylindrical pin is fixedly connected to the outer side of the top of the dial. An arc-shaped concave column is fixedly connected to the center position of the top of the dial, and the arc surface of the arc-shaped concave column faces the cylindrical pin;

[0015] As a further description of the above technical solution:

[0016] The transmission mechanism further includes a grooved wheel. The top of the grooved wheel is fixedly connected to the bottom of the installation disk. Multiple locking arc surfaces are formed on the outer side of the grooved wheel, and radial grooves are formed between the multiple locking arc surfaces. The locking arc surface contacts the outer side of the arc-shaped concave surface;

[0017] As a further description of the above technical solution:

[0018] A blower is arranged inside the purging air box. An arc-shaped groove is formed at the bottom of the purging air box. The shape of the arc-shaped groove is adapted to the shape of the activated carbon adsorption box, and the air outlet holes at the bottom of the purging air box face two of the activated carbon adsorption boxes;

[0019] As a further description of the above technical solution:

[0020] A plurality of diversion grooves are formed in the petal-shaped diversion plate. The shape of the diversion grooves is adapted to the shape of the activated carbon adsorption box, and the caliber of the diversion grooves gradually decreases from the bottom to the top.

[0021] As a further description of the above technical solution:

[0022] A rubber top head is arranged at the top of the top column, a hemispherical convex head is arranged at the bottom of the top column, and a lubricating layer is arranged outside the hemispherical convex head.

[0023] As a further description of the above technical solution:

[0024] The U-shaped chuck cooperates with the dovetail groove to fix the activated carbon adsorption box, and a plurality of U-shaped chucks are connected by a snap spring.

[0025] As a further description of the above technical solution:

[0026] The shape of the sealing washer is adapted to the shape of the bottom of the dovetail groove.

[0027] As a further description of the above technical solution:

[0028] The shape of the cylindrical pin is adapted to the shape of the radial groove.

[0029] The present invention has the following beneficial effects:

[0030] 1. In the present invention, when the main rotating shaft rotates, the cylindrical pin of the dial engages with the radial groove of the Geneva wheel, so that the rotating adsorption disc intermittently rotates at a rhythm of 1 / 5 turn, so that the activated carbon adsorption boxes on the adsorption disc are grouped to switch work positions: four groups continuously adsorb waste gas in the adsorption area, and one group enters the regeneration area. And because the arc top pile rotates synchronously with the main rotating shaft, its semi-circular protrusion is mechanically linked with the hemispherical convex head of the top column, pushing the top column to reciprocate, driving the adsorption box to vibrate at high frequency; at the same time, the purge gas box sprays air flow in a specific direction to remove the organic matter adsorbed by the activated carbon. Each mechanical structure cooperates through pure mechanical motion logic to realize the automatic cycle of adsorption-regeneration, ensure the continuous operation of the device, improve the regeneration efficiency of activated carbon, reduce manual intervention, and adapt to the industrial continuous production scenario.

[0031] 2. In the present invention, quick - installation sealing is achieved through a dovetail groove, a U - shaped chuck, and a snap ring: the dovetail groove provides guidance, the U - shaped chuck holds and positions, and the snap ring provides elastic pre - tightening to ensure that the adsorption box is stable and displacement - free during rotation and vibration. The vent holes of the box body and the spiral drainage grooves are designed to extend the exhaust gas flow path and increase the contact area with the activated carbon; the bottom sealing gasket uses differential pressure for dynamic sealing to prevent exhaust gas leakage and ensure that all the exhaust gas passes through the adsorption box. The flow guide grooves of the petal - shaped flow guide plate evenly distribute the air flow, making the intake air volume of each adsorption box balanced. These structures optimize the contact conditions between the exhaust gas and the activated carbon through mechanical cooperation and air flow guiding logic, improve the adsorption efficiency, ensure the reliability of exhaust gas purification, and provide stable mechanical support for exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three - dimensional schematic diagram of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0033] Figure 2 is a structural schematic diagram of the adsorption tower of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0034] Figure 3 is a structural schematic diagram of the rotating adsorption disk of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0035] Figure 4 is Figure 3 an enlarged view of part A in

[0036] Figure 5 is a structural schematic diagram of the activated carbon adsorption box of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0037] Figure 6 is a structural schematic diagram of the transmission mechanism of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0038] Figure 7 is a structural schematic diagram of the regeneration mechanism of a waste gas purification device for preparing watermelon ketone proposed by the present invention;

[0039] Figure 8 is Figure 7 an enlarged view of part B in

[0040] Legend:

[0041] 1. Support; 2. Adsorption tower; 3. Motor; 4. Main rotating shaft; 5. Transmission mechanism; 501. Driving wheel; 502. Support arm; 503. Driven wheel; 504. Dial; 505. Cylindrical pin; 506. Arc concave column; 507. Grooved pulley; 6. Rotating adsorption disc; 601. Tapered roller bearing; 602. Mounting disc; 603. Dovetail groove; 604. U-shaped chuck; 605. Snap ring; 7. Activated carbon adsorption box; 701. Box body; 702. Vent hole; 703. Spiral drainage groove; 704. Sealing gasket; 8. Petal-shaped deflector; 9. Regeneration mechanism; 901. Arc top pile; 902. Semi-circular protrusion; 903. Dust collecting hopper; 904. Top column; 905. Connecting disc; 906. Return spring; 10. Purge gas box. Detailed implementation manner

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Referring to Figures 1 to 8 , an embodiment provided by the present invention: A waste gas purification device for preparing watermelon ketone includes a support 1. The support 1 serves as the support basis of the device, fixes components such as the adsorption tower 2 and the motor 3, and ensures the overall structural stability of the device. The adsorption tower 2 is fixedly connected to the inner side thereof. The adsorption tower 2 forms a closed waste gas treatment space, accommodating core components such as the rotating adsorption disc 6 and the activated carbon adsorption box 7, and ensuring the closure of the gas flow path. The motor 3 is installed at the bottom thereof. The motor 3 provides a power source to drive the main rotating shaft 4 to rotate, providing power for the mechanical movement of the device. The output end thereof is fixedly connected to the main rotating shaft 4. The main rotating shaft 4 connects the motor 3 and the transmission mechanism 5, transmits the rotational power, and at the same time drives the petal-shaped deflector 8 to rotate. The transmission mechanism 5 is arranged at the top thereof. The rotating adsorption disc 6 is arranged on the inner wall of the adsorption tower 2. A plurality of activated carbon adsorption boxes 7 are detachably connected to the top of the rotating adsorption disc 6. The petal-shaped deflector 8 is fixedly connected to the outer wall of the main rotating shaft 4. The regeneration mechanism 9 is arranged at the top of the petal-shaped deflector 8. The purge gas box 10 is arranged outside the adsorption tower 2. An arc-shaped groove is opened at the bottom of the purge gas box 10. The shape of the arc-shaped groove is adapted to the shape of the activated carbon adsorption box 7, and the bottom air outlet of the purge gas box 10 is directly opposite to two of the activated carbon adsorption boxes 7 to spray high-pressure gas to remove the organic matter adsorbed by the activated carbon in the regeneration area;

[0044] The regeneration mechanism 9 includes an arc-shaped top pile 901. A plurality of semi-circular protrusions 902 are arranged on the top of the arc-shaped top pile 901. When rotating with the petal-shaped flow guide plate 8, they cooperate with the top column 904 to push the top column 904 to reciprocate. A dust collection hopper 903 is detachably connected inside the adsorption tower 2. The dust collection hopper 903 collects the organic matter blown out during regeneration. A top column 904 is slidably connected inside it. A rubber top head is arranged on the top of the top column 904 for transmitting vibration to the bottom of the activated carbon adsorption box 7. A hemispherical convex head is arranged at the bottom, and a lubricating layer is arranged outside the hemispherical convex head to reduce the friction with the semi-circular protrusions 902. The bottom of the top column 904 contacts the semi-circular protrusions 902. A connection plate 905 is arranged on the outside. A return spring 906 is arranged between the connection plate 905 and the bottom of the dust collection hopper 903 to make the top column 904 return to the initial position after the vibration is completed, ensuring the periodicity of the regeneration process;

[0045] The rotary adsorption disk includes a tapered roller bearing 601. The outside of the tapered roller bearing 601 is fixedly connected to the inside of the adsorption tower 2. An installation disk 602 is rotatably connected to the inside to support the rotation of the installation disk 602 and reduce friction. A plurality of dovetail grooves 603 are formed inside the installation disk 602 to provide installation guidance for the activated carbon adsorption box 7, facilitating disassembly and assembly. A U-shaped chuck 604 is arranged in the middle of the dovetail groove 603. The U-shaped chuck 604 cooperates with the dovetail groove 603 to fix the activated carbon adsorption box 7. A plurality of U-shaped chucks 604 are connected by a snap spring 605 to provide elastic pre-tightening force to ensure that the adsorption box is stable and has no displacement during rotation and vibration;

[0046] The activated carbon adsorption box 7 includes a box body 701. The outside of the box body 701 is detachably connected inside the dovetail groove 603, and the bottom contacts the top of the top column 904, and the outside contacts the inside of the U-shaped chuck 604. A plurality of ventilation holes 702 are formed inside it to provide a flow channel for the waste gas. A plurality of spiral drainage grooves 703 are formed inside the ventilation holes 702 to extend the waste gas flow path and increase the contact area with the honeycomb activated carbon. A sealing gasket 704 is arranged on the outside of the bottom of the box body 701, and the shape of the sealing gasket 704 is adapted to the shape of the bottom of the dovetail groove 603 to achieve dynamic sealing by using the gas pressure difference inside and outside the adsorption tower 2 to prevent waste gas leakage;

[0047] A plurality of flow guide grooves are formed on the petal-shaped flow guide plate 8. The shape of the flow guide grooves is adapted to the shape of the activated carbon adsorption box 7, and the caliber of the flow guide grooves gradually decreases from the bottom to the top to achieve uniform distribution of the waste gas and make the intake air volume of each activated carbon adsorption box 7 balanced;

[0048] The transmission mechanism 5 includes a driving wheel 501, the bottom of the driving wheel 501 is fixedly connected to the top of the main rotating shaft 4, a support arm 502 is fixedly connected to the inner wall of the adsorption tower 2, the other end of the support arm 502 is rotatably connected to a driven wheel 503, the driving wheel 501 meshes with the driven wheel 503 to transmit the power of the main rotating shaft 4 to the driven wheel 503. A dial 504 is fixedly connected to the top of the driven wheel 503, a cylindrical pin 505 is fixedly connected to the outer side of the top of the dial 504, and an arc concave column 506 is fixedly connected to the center position of the top, and the arc surface of the arc concave column 506 faces the cylindrical pin 505. Through the cooperation of the cylindrical pin 505 and the radial groove of the Geneva wheel 507 and the mechanical locking of the locking arc surface and the arc concave column 506, the transmission mechanism 5 further includes a Geneva wheel 507. The top of the Geneva wheel 507 is fixedly connected to the bottom of the mounting disc 602, and a plurality of locking arc surfaces are arranged on the outer side, and radial grooves are arranged between the plurality of locking arc surfaces. The locking arc surface contacts the outer side of the arc concave surface, and the shape of the cylindrical pin 505 is adapted to the shape of the radial groove to realize the intermittent rotation of the Geneva wheel 507, and further drive the rotary adsorption disc 6 to rotate in an intermittent manner, ensuring that the activated carbon adsorption box 7 periodically switches positions between the adsorption area and the regeneration area.

[0049] Working principle: After the motor 3 is started, its output end drives the main rotating shaft 4 to rotate. In the transmission mechanism 5 at the top of the main rotating shaft 4, the driving wheel 501 rotates with the shaft, and drives the dial 504 to rotate through the meshing transmission with the driven wheel 503. The cylindrical pin 505 on the dial 504 cooperates with the radial groove of the Geneva wheel 507, and the mechanical locking of the locking arc surface and the arc concave column 506 is used to realize the intermittent rotation of the Geneva wheel 507. Furthermore, the rotation of the Geneva wheel 507 drives the rotary adsorption disc 6 to rotate in an intermittent manner, that is, when the main rotating shaft 4 rotates one circle, the rotary adsorption disc 6 rotates one-fifth of a circle, ensuring that each group of activated carbon adsorption boxes 7 (two adjacent activated carbon adsorption boxes 7 are a group, a total of five groups) stay in the adsorption area for enough time (four groups of activated carbon adsorption boxes 7 are located in the adsorption area, and one group is located in the regeneration area).

[0050] After the waste gas enters the adsorption tower 2, it first passes through the diversion grooves of the petal-shaped guide plate 8 to realize the uniform distribution of the air flow. The diverted waste gas enters the activated carbon adsorption box 7, and the ventilation holes 702 and the spiral diversion grooves 703 in the box body 701 increase the contact area between the waste gas and the honeycomb activated carbon. The pollutants in the waste gas are adsorbed by the activated carbon, and the purified gas is discharged from the top of the adsorption tower 2.

[0051] When the rotating adsorption disc 6 brings the activated carbon adsorption box 7 into the regeneration area, the petal-shaped flow guide plate 8 on the outer wall of the main rotating shaft 4 rotates synchronously, driving the arc top pile 901 to rotate. The semi-circular protrusion 902 on the arc top pile 901 contacts the hemispherical protrusion at the bottom of the top column 904, pushing the top column 904 to move upward along the slideway in the dust collection hopper 903. The rubber top head at the top of the top column 904 contacts the bottom of the activated carbon adsorption box 7 and causes it to vibrate multiple times through multiple semi-circular protrusions 902. At the same time, the arc-shaped groove of the purge gas box 10 sprays high-pressure gas towards the two adsorption boxes in the regeneration area, blowing the adsorbed organic matter into the dust collection hopper 903. The reset of the top column 904 is achieved by the connecting disc 905 and the reset spring 906 to ensure that it returns to the initial position after each vibration.

[0052] The activated carbon adsorption box 7 is installed by fitting the dovetail groove 603 with the U-shaped chuck 604, and the snap ring 605 provides elastic pre-tightening force to ensure that the module does not directly disengage from the dovetail groove 603 during rotation and vibration. The sealing gasket 704 at the bottom achieves dynamic sealing by utilizing the gas pressure difference inside and outside the adsorption tower 2 to prevent waste gas leakage. The continuous operation of the motor 3 enables the entire device to achieve the cyclic operation of adsorption and regeneration. The dust collection hopper 903 is detachable and the collected organic matter is cleaned regularly.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for purifying waste gas in the preparation of watermelon ketone, comprising a bracket (1), characterized in that: An adsorption tower (2) is fixedly connected to the inner side of the bracket (1). A motor (3) is installed at the bottom of the adsorption tower (2). The output end of the motor (3) is fixedly connected to a main rotating shaft (4). A transmission mechanism (5) is arranged at the top of the main rotating shaft (4). A rotating adsorption disc (6) is arranged on the inner wall of the adsorption tower (2). A plurality of activated carbon adsorption boxes (7) for adsorbing the waste gas generated in the preparation of watermelon ketone are detachably connected to the top of the rotating adsorption disc (6). A petal-shaped flow guide plate (8) is fixedly connected to the outer wall of the main rotating shaft (4). A regeneration mechanism (9) is arranged at the top of the petal-shaped flow guide plate (8). A purging gas box (10) is arranged outside the adsorption tower (2). The regeneration mechanism (9) includes an arc-shaped top pile (901) fixedly connected to the top of the petal-shaped flow guide plate (8). A plurality of semi-circular protrusions (902) are arranged at the top of the arc-shaped top pile (901). A dust collecting hopper (903) is detachably connected to the inside of the adsorption tower (2). A top column (904) is slidably connected to the inside of the dust collecting hopper (903). The bottom of the top column (904) is in contact with the semi-circular protrusions (902). A connecting disc (905) is arranged outside the top column (904). A return spring (906) is arranged between the connecting disc (905) and the bottom of the dust collecting hopper (903).

2. The waste gas purification device for preparing watermelon ketone according to claim 1, wherein: The rotary adsorption disc includes a tapered roller bearing (601). The outside of the tapered roller bearing (601) is fixedly connected to the inner side of the adsorption tower (2). The inner side of the tapered roller bearing (601) is rotatably connected to a mounting disc (602). A plurality of dovetail grooves (603) are formed inside the mounting disc (602). A U-shaped chuck (604) is arranged in the middle of the dovetail groove (603).

3. The waste gas purification device for preparing watermelon ketone according to claim 1, wherein: The activated carbon adsorption box (7) includes a box body (701). The outside of the box body (701) is detachably connected to the inside of the dovetail groove (603), and the bottom of the box body (701) is in contact with the top of the top column (904). The outside of the box body (701) is in contact with the inner side of the U-shaped chuck (604). A plurality of ventilation holes (702) are formed inside the box body (701). A plurality of spiral drainage grooves (703) are formed inside the ventilation holes (702). A sealing gasket (704) is arranged outside the bottom of the box body (701).

4. The waste gas purification device for preparing damascenone according to claim 1, wherein: The transmission mechanism (5) includes a driving wheel (501). The bottom of the driving wheel (501) is fixedly connected to the top of the main rotating shaft (4). A support arm (502) is fixedly connected to the inner wall of the adsorption tower (2). The other end of the support arm (502) is rotatably connected to a driven wheel (503). The driving wheel (501) is engaged with the driven wheel (503). A dial (504) is fixedly connected to the top of the driven wheel (503). A cylindrical pin (505) is fixedly connected to the outer side of the top of the dial (504). An arc-shaped concave column (506) is fixedly connected to the center position of the top of the dial (504), and the arc surface of the arc-shaped concave column (506) faces the cylindrical pin (505).

5. The waste gas purification device for preparing watermelon ketone according to claim 4, wherein: The transmission mechanism (5) further includes a Geneva wheel (507). The top of the Geneva wheel (507) is fixedly connected to the bottom of the mounting plate (602). A plurality of locking arc surfaces are provided on the outer side of the Geneva wheel (507), and radial grooves are provided between the plurality of locking arc surfaces. The locking arc surfaces are in contact with the outer side of the arc concave surface.

6. The waste gas purification device for preparing watermelon ketone according to claim 1, characterized in that: A blower is provided inside the purging air box (10). An arc-shaped groove is provided at the bottom of the purging air box (10). The shape of the arc-shaped groove is adapted to the shape of the activated carbon adsorption box (7), and the air outlet holes at the bottom of the purging air box (10) are directly opposite to two of the activated carbon adsorption boxes (7).

7. The waste gas purification device for preparing watermelon ketone according to claim 1, wherein: A plurality of flow guiding grooves are provided on the petal-shaped flow guiding plate (8). The shape of the flow guiding grooves is adapted to the shape of the activated carbon adsorption box (7), and the caliber of the flow guiding grooves gradually decreases from the bottom to the top.

8. The waste gas purification device for preparing watermelon ketone according to claim 1, wherein: A rubber top head is provided at the top of the top column (904). A hemispherical convex head is provided at the bottom of the top column (904), and a lubricating layer is provided on the outside of the hemispherical convex head.

9. The waste gas purification device for preparing watermelon ketone according to claim 2, wherein: The U-shaped chuck (604) cooperates with the dovetail groove (603) to fix the activated carbon adsorption box (7). A plurality of U-shaped chucks (604) are connected by a snap ring (605).

10. The waste gas purification device for preparing watermelon ketone according to claim 3, characterized in that: The shape of the sealing washer (704) is adapted to the shape of the bottom of the dovetail groove (603).

11. An apparatus for purifying waste gas in the preparation of watermelon ketone according to claim 5, characterized in that: The shape of the cylindrical pin (505) is adapted to the shape of the radial groove.

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