VOCs (Volatile Organic Compounds) treatment device with multi-stage washing and absorption

Abstract

The invention relates to the field of VOCs treatment, in particular to a multi-stage washing and absorbing VOCs treatment device which comprises a base, a power box, a heating and purifying box, two washing tanks and an exhaust pipe, a power cavity is formed in the power box, an air inlet pipe and an air guide pipe are installed on the power box and both communicate with the power cavity, and the heating and purifying box is connected with the two washing tanks. One end of the gas guide pipe is fixedly communicated with the heating and purifying box, two electric heating rods are mounted on the heating and purifying box, and a first metal plate and a second metal plate are arranged between the two electric heating rods. Through cooperative arrangement of a driving assembly and a power assembly in the power box, the distance between a first metal plate and a second metal plate can be adjusted, so that opening and closing of a first through hole and a second through hole are controlled, the residence time of waste gas in the heating and purifying box is prolonged, the flowing direction of VOCs waste gas in the heating and purifying box can be controlled through an air guide plate, and the heating and purifying effects are improved. And full contact between the waste gas and the catalyst is ensured, so that the catalytic effect and the removal rate of VOCs are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of VOCs treatment, and in particular to a VOCs treatment device with multi-stage washing and absorption. Background Art

[0002] Volatile organic compounds refer to organic compounds that have a high saturated vapor pressure (greater than 13.33Pa), a low boiling point, a small molecular weight, and are easily volatile at room temperature under standard conditions. This substance is one of the main pollutants in the atmosphere and is often represented by VOC or VOCs, while total volatile organic compounds are represented by TVOC. It is worth noting that VOCs does not refer to a specific pollutant, but a general term for a class of organic compounds with similar physical and chemical properties.

[0003] A Chinese patent with announcement number CN208975508U discloses a VOCs treatment alkaline washing and absorption device, which adds washing liquid into the washing liquid pipeline, and the washing liquid is sprayed through multiple nozzles, so that the exhaust gas is fully in contact with the washing liquid, which facilitates the absorption of the exhaust gas, improves the exhaust gas treatment effect, and facilitates gas recycling.

[0004] A Chinese patent with announcement number CN109777452A discloses a VOCs treatment device for a coking plant, which can adsorb and treat VOCs waste gas generated by the chemical production tank area, refined benzene tank area, and loading and unloading platform. The waste gas is treated by a washing absorption + combustion process to achieve zero emission of waste gas treatment. The device can not only reduce VOCs pollutants, but also has a significant effect on improving the quality of the atmospheric environment.

[0005] Although absorption and treatment are carried out by burning high-concentration VOCs and then washing them to reduce the concentration, the contact time between VOCs waste gas and flame is short in the flame combustion method, and the treatment effect on VOCs waste gas is limited. In addition, the burned VOCs waste gas itself has high heat, and the dissolution effect of directly mixing high-temperature VOCs in acid and alkali liquid or water is poor, which affects the treatment effect of VOCs waste gas. In addition, the contact time between acid and alkali liquid or water and VOCs waste gas is short in the direct spraying method, and it is difficult for the waste gas to fully contact with the washing liquid.

[0006] Therefore, the present invention provides a VOCs treatment device with multi-stage washing and absorption to solve the above problems. Summary of the invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a VOCs treatment device with multi-stage washing and absorption to solve the problem that the contact time between VOCs waste gas and flame in the above-mentioned flame combustion method is short, and the treatment effect on VOCs waste gas is limited. In addition, the burned VOCs waste gas itself has high heat, and the dissolution effect of directly mixing high-temperature VOCs in acid and alkali solution or water is poor, which affects the treatment effect on VOCs waste gas. In addition, in the direct spraying method, the contact time between acid and alkali solution or water and VOCs waste gas is short, and it is difficult for the waste gas to fully contact with the washing liquid.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A multi-stage washing and absorption VOCs treatment device comprises a base, a power box, a heating and purification box, two washing tanks and an exhaust pipe. A power chamber is provided in the power box. An air intake pipe and an air guide pipe are installed on the power box, and both the air intake pipe and the air guide pipe are connected to the power chamber. One end of the air guide pipe is fixedly connected to the heating and purification box.

[0010] Two electric heating rods are installed on the heating and purification box, a first metal plate and a second metal plate are arranged between the two electric heating rods, and the second metal plate is fixedly connected in the heating and purification box, a second through hole is opened on the first metal plate, and a first through hole is opened on the second metal plate, and two first rotating shafts are rotatably connected in the heating and purification box, and air guide plates are fixedly connected to the two first rotating shafts.

[0011] The power box is provided with a driving component, which includes a driving assembly for controlling the flow direction and residence time of VOCs waste gas in the heating and purification box and a power assembly for driving the driving assembly through the wind force of the VOCs waste gas in the power cavity.

[0012] A cooling component is arranged above the heating purification box for cooling the heated VOCs waste gas and then transporting it to the washing tank.

[0013] An air supply pipe is arranged between the two washing tanks, and the air supply pipe is connected to the two washing tanks. Conical covers are fixedly connected to the two washing tanks. The space inside the washing tanks is divided into a water washing chamber and a purification chamber by the conical covers. Clean water is arranged in the water washing chamber. A connecting pipe is fixedly connected to the conical cover, and a shielding cover is fixedly connected to the connecting pipe.

[0014] Two liquid spraying components are arranged on the base, and the two liquid spraying components spray acid solution and alkali solution into the two purification chambers respectively.

[0015] Both washing tanks are provided with an enhancement component, which includes a packing frame and a driving shaft. The packing frame is fixedly connected to the purification chamber, and the upper surface and the bottom surface of the packing frame are provided with flow holes. Packing balls are arranged in the packing frame. The middle section of the driving shaft is rotatably connected to the packing frame. A stirring rod is fixedly connected to the driving shaft, and the stirring rod is located in the packing frame. The two driving shafts are connected through a first pulley and a belt transmission. A motor is installed on the washing tank, and the motor is connected to any one of the driving shafts through a bevel gear.

[0016] Preferably, the power assembly includes a second rotating shaft, which is rotatably connected to the power cavity, and both ends of the second rotating shaft are located outside the power box. A rotor is fixedly connected to the second rotating shaft, and a circular array of storage grooves is provided on the rotor. A baffle is slidably connected to the storage groove, and an end of the baffle away from the rotor abuts against the inner wall of the power cavity.

[0017] Preferably, the driving assembly includes a first turntable, which is fixedly connected to one end of the second rotating shaft, and a first hinged rod is hinged on the first turntable, and a rack is hinged on the end of the first hinged rod away from the first turntable, and a sliding groove is provided on the rack, and a guide block is slidably connected in the sliding groove, and the guide block is fixedly connected to the power box.

[0018] Preferably, the two first rotating shafts are both fixedly connected with transmission gears, the two transmission gears are both meshed with racks, and ventilation holes are provided on the air guide plate.

[0019] Preferably, the driving assembly also includes a second turntable, which is fixedly connected to the other end of the second rotating shaft, and a second hinged rod is hinged on the second turntable. A lifting plate is provided above the heating and purification box, and a guide rod is fixedly connected to the bottom surface of the lifting plate. The bottom end of the guide rod passes through the heating and purification box and is fixedly connected to the first metal plate, and the end of the second hinged rod away from the second turntable is hinged on the lifting plate.

[0020] Preferably, the cooling component includes a gathering tube, one end of which is fixedly connected to the upper surface of the heating and purification box, the other end of which is fixedly connected to a first junction box, a second junction box is arranged on one side of the first junction box, the upper surface of the second junction box is fixedly connected to heat dissipation copper tubes arranged at equal intervals, one end of the heat dissipation copper tube away from the second junction box is fixedly connected to the first junction box, the bottom surface of the second junction box is fixedly connected to a transfer tube, and one end of the transfer tube away from the second junction box is fixedly connected to the washing tank.

[0021] Preferably, a mounting base is fixedly connected to the first junction box, a transmission shaft is rotatably connected to the mounting base, a spoiler is fixedly connected to the bottom end of the transmission shaft, and the spoiler is located above the heat dissipation copper tube, and the transmission shaft is connected to the drive shaft through a second pulley and a belt.

[0022] Preferably, the liquid spray assembly includes a liquid storage box, a water pump is installed on the liquid storage box, the input end of the water pump is located in the liquid storage box, the output end of the water pump passes through the upper surface of the washing tank and is fixedly connected to an atomizer, and the atomizer is located above the filling frame, the liquid storage box is fixedly connected to a return pipe, and the return pipe is connected to the purification chamber.

[0023] Preferably, the stirring rod is fixedly connected with raised blocks arranged at equal intervals, the bottom end of the driving shaft passes through the shielding cover and is fixedly connected with fan blades, and the fan blades are located in the connecting pipe, and the driving shaft is rotatably connected to the shielding cover.

[0024] The beneficial effects of the present invention are:

[0025] 1. By coordinating the driving assembly and the power assembly in the power box, the distance between the first metal plate and the second metal plate can be adjusted, thereby controlling the opening and closing of the first through hole and the second through hole, increasing the residence time of the exhaust gas in the heating purification box, and using the air guide plate to control the flow direction of the VOCs exhaust gas in the heating purification box to ensure full contact between the exhaust gas and the catalyst, thereby significantly improving the catalytic effect and the removal rate of VOCs.

[0026] 2. By setting up cooling components and purified water, that is, the coordinated setting of heat dissipation copper tubes, spoilers and purified water, the exhaust gas in the heat dissipation copper tubes can be cooled by blowing air, and then the exhaust gas can be cooled again by purified water, which effectively reduces the temperature of the VOCs exhaust gas after heating, provides suitable conditions for subsequent washing and purification, and avoids the problem of poor dissolution effect caused by direct contact between high-temperature exhaust gas and washing liquid.

[0027] 3. By setting up an enhancement component, that is, the packing balls and stirring rods in the packing frame are arranged together, the packing balls make the acid and alkali liquid more uniform in the packing frame, and the driving shaft drives the stirring rod and the protruding block to stir the packing balls in the packing frame, which not only improves the contact effect between the acid and alkali liquid and the VOCs waste gas, but also effectively prevents the clogging of the packing balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The three-dimensional Figure 1 ;

[0029] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0030] Figure 3The three-dimensional Figure 2 ;

[0031] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0032] Figure 5 A top view of the present invention;

[0033] Figure 6 is a cross-sectional view of the present invention;

[0034] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0035] Figure 8 This is a schematic diagram of the installation of the power assembly in the power box of the present invention;

[0036] Fig. 9 It is a schematic diagram of the overall structure of the heating and purification box in the present invention;

[0037] Fig.10 It is a structural schematic diagram of the cooling component in the present invention;

[0038] Fig.11 It is a schematic diagram of the structure of the synergistic component in the present invention.

[0039] In the figure: 1, base; 2, power box; 3, heating and purification box; 4, washing tank; 5, spray assembly; 51, liquid storage box; 52, water pump; 53, return pipe; 54, atomizer; 6, power assembly; 61, second rotating shaft; 62, rotor; 63, storage slot; 64, baffle; 7, drive assembly; 71, first turntable; 72, first hinged rod; 73, rack; 74, transmission gear; 75, guide block; 76, guide rod; 77, second turntable; 78, second hinged rod; 79, lifting plate; 8, cooling assembly; 81, gathering pipe; 82, first junction box; 83, second junction box; 84, transfer pipe; 85, heat dissipation copper Tube; 86, mounting seat; 87, transmission shaft; 88, spoiler; 9, efficiency enhancement component; 91, stuffing frame; 92, stuffing ball; 93, flow hole; 94, drive shaft; 95, fan blade; 96, stirring rod; 97, raised block; 10, air intake pipe; 11, air guide pipe; 12, electric heating rod; 13, first metal plate; 14, second metal plate; 15, first through hole; 16, second through hole; 17, first rotating shaft; 18, air guide plate; 19, air supply pipe; 20, conical cover; 21, water washing chamber; 22, purification chamber; 23, clean water; 24, connecting pipe; 25, shielding cover; 26, motor; 27, exhaust pipe; 28, power chamber. DETAILED DESCRIPTION

[0040] The following will refer to the attached Figures 1 to 11 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0041] A multi-stage washing and absorption VOCs treatment device, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 8 and Fig. 9 As shown, it includes a base 1, a power box 2, a heating and purification box 3, two washing tanks 4 and an exhaust pipe 27. A power chamber 28 is opened in the power box 2. An air intake pipe 10 and an air guide pipe 11 are installed on the power box 2, and the air intake pipe 10 and the air guide pipe 11 are both connected to the power chamber 28. One end of the air guide pipe 11 is fixedly connected to the heating and purification box 3. The air intake pipe 10 serves as an inlet for VOCs waste gas to enter the power chamber 28. The VOCs waste gas needs to be compressed into compressed air by an air compressor and then transported to the inside of the power chamber 28 through the air intake pipe 10. After the VOCs waste gas flows in the power chamber 28, it enters the heating and purification box 3 through the air guide pipe 11.

[0042] like Fig. 9 As shown, two electric heating rods 12 are installed on the heating purification box 3, a first metal plate 13 and a second metal plate 14 are arranged between the two electric heating rods 12, and the second metal plate 14 is fixedly connected to the heating purification box 3, the first metal plate 13 and the second metal plate 14 are both made of aluminum oxide inside, and a platinum metal layer is attached to the surface, a second through hole 16 is opened on the first metal plate 13, and a first through hole 15 is opened on the second metal plate 14, two first rotating shafts 17 are rotatably connected in the heating purification box 3, and the two first rotating shafts 17 are fixedly connected with air guide plates 18, and the electric heating rods 12 After power is turned on, a certain amount of heat will be generated to increase the temperature in the heating and purification box 3, which can be used as a catalyst to catalyze VOCs waste gas. The first through hole 15 and the second through hole 16 are respectively at the opposite ends of the first metal plate 13 and the second metal plate 14, that is, the first through hole 15 and the second through hole 16 will be in a closed state after the first metal plate 13 and the second metal plate 14 are attached, thereby increasing the residence time of VOCs waste gas in the heating and purification box 3, and after the first metal plate 13 and the second metal plate 14 are moved away from each other, the gas can flow through the first through hole 15 and the second through hole 16.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9As shown, a driving component is provided on the power box 2, and the driving component includes a driving component 7 for controlling the flow direction and retention time of the VOCs waste gas in the heating and purification box 3 and a power component 6 for driving the driving component 7 by the wind force of the VOCs waste gas in the power chamber 28. The power component 6 includes a second rotating shaft 61, which is rotatably connected to the power chamber 28, and both ends of the second rotating shaft 61 are located outside the power box 2. A rotor 62 is fixedly connected to the second rotating shaft 61, and a rotor 62 is provided on the rotor 62. The receiving groove 63 is in a circumferential array, and a baffle 64 is slidably connected in the receiving groove 63, and the end of the baffle 64 away from the rotor 62 abuts against the inner wall of the power chamber 28. The rotor 62 is eccentrically designed in the power chamber 28. After the compressed VOCs exhaust gas enters the power chamber 28 through the intake pipe 10, the baffle 64 contacts the power chamber 28 under the action of gravity to form a wind-blocking barrier, and the pressurized VOCs exhaust gas drives the second rotating shaft 61 to rotate through the rotor 62. The driving component 7 includes the first A rotating disk 71, the first rotating disk 71 is fixedly connected to one end of the second rotating shaft 61, a first hinged rod 72 is hinged on the first rotating disk 71, and a rack 73 is hinged on the end of the first hinged rod 72 away from the first rotating disk 71, a slide groove is provided on the rack 73, a guide block 75 is slidably connected in the slide groove, and the guide block 75 is fixedly connected to the power box 2, and the two first rotating shafts 17 are fixedly connected to the transmission gear 74, and the two transmission gears 74 are meshed with the rack 73, and a vent is provided on the air guide plate 18. After the second rotating shaft 61 rotates, the first turntable 71 will drive the rack 73 to move up and down and reciprocate through the first hinged rod 72 during rotation, and under the action of the transmission gear 74, it will drive the first rotating shaft 17 to rotate back and forth in a small amplitude, and make the first rotating shaft 17 drive the air guide plate 18 to swing, thereby dispersing the VOCs waste gas entering the heating and purification box 3 from the air guide pipe 11, so that the VOCs waste gas contacts multiple places on the electric heating rod 12, which can ensure the heating effect of the VOCs waste gas.

[0044] like Figure 4 and Fig. 9 As shown, the driving assembly 7 also includes a second turntable 77, which is fixedly connected to the other end of the second rotating shaft 61, and a second hinged rod 78 is hinged on the second turntable 77. A lifting plate 79 is arranged above the heating and purification box 3, and a guide rod 76 is fixedly connected to the bottom surface of the lifting plate 79. The bottom end of the guide rod 76 passes through the heating and purification box 3 and is fixedly connected to the first metal plate 13. The end of the second hinged rod 78 away from the second turntable 77 is hinged on the lifting plate 79. When the second through hole 16 rotates, the second turntable 77 is also driven to rotate, and the lifting plate 79 is driven to perform reciprocating lifting and lowering motion through the second hinged rod 78, so that the lifting plate 79 drives the first metal plate 13 to perform lifting and lowering motion through the guide rod 76, and can automatically complete the bonding and separation of the first metal plate 13 and the second metal plate 14.

[0045] like Figure 1 , Figure 3 , Figure 5 , Fig. 9 and Fig.10 As shown, a cooling component 8 for cooling the heated VOCs waste gas and then transporting it to the washing tank 4 is arranged above the heating purification box 3. The cooling component 8 includes a gathering pipe 81. One end of the gathering pipe 81 is fixedly connected to the upper surface of the heating purification box 3. The other end of the gathering pipe 81 is fixedly connected to a first junction box 82. A second junction box 83 is arranged on one side of the first junction box 82. The upper surface of the second junction box 83 is fixedly connected to heat dissipation copper tubes 85 arranged at equal intervals. One end of the heat dissipation copper tube 85 away from the second junction box 83 is fixedly connected to the first junction box 82. The bottom surface of the second junction box 83 is fixedly connected to a transfer pipe 84, and the transfer pipe 84 is away from the second junction box 83. One end of the box 83 is fixedly connected to the washing tank 4, and a mounting seat 86 is fixedly connected to the first junction box 82. A transmission shaft 87 is rotatably connected to the mounting seat 86. A spoiler 88 is fixedly connected to the bottom end of the transmission shaft 87, and the spoiler 88 is located above the heat dissipation copper tube 85. The first junction box 82 and the second junction box 83 are both square boxes. The heat dissipation copper tube 85 can transport the air in the first junction box 82 to the inside of the second junction box 83. Since the heat dissipation copper tube 85 is made of copper, it has good thermal conductivity. When the transmission shaft 87 rotates on the mounting seat 86, the spoiler 88 will generate a certain amount of wind blowing onto the heat dissipation copper tube 85, thereby accelerating the heat dissipation of the heat dissipation copper tube 85.

[0046] like Figure 1 and Figure 6 As shown, an air supply pipe 19 is provided between the two washing tanks 4, and the air supply pipe 19 is connected to the two washing tanks 4, that is, the VOCs waste gas purified in one washing tank 4 is transported to the other washing tank 4 for secondary purification. Conical covers 20 are fixedly connected to the two washing tanks 4. The space in the washing tank 4 is divided into a water washing chamber 21 and a purification chamber 22 by the conical covers 20. Clean water 23 is provided in the water washing chamber 21. The clean water 23 can cool down and purify the VOCs waste gas entering the washing tank 4. The washing tank 4 is provided with a water-conical cover 20. The water inlet pipe and the water outlet pipe connected to the washing chamber 21 can circulate and replace the clean water 23 in the washing chamber 21, so that the clean water 23 always maintains a low temperature state. A connecting pipe 24 is fixedly connected to the conical cover 20, and a shielding cover 25 is fixedly connected to the connecting pipe 24. The washing chamber 21 is connected with the purification chamber 22 through the connecting pipe 24, and the shielding cover 25 can shield the top of the connecting pipe 24, so that the cooled VOCs exhaust gas flowing out of the washing chamber 21 will diffuse around the connecting pipe 24 under the blocking effect of the shielding cover 25.

[0047] like Figure 3 , Figure 5 and Figure 6 As shown, two liquid spraying assemblies 5 are arranged on the base 1, and the two liquid spraying assemblies 5 spray acid and alkali solution into the two purification chambers 22 respectively. The liquid spraying assembly 5 includes a liquid storage box 51, and a water pump 52 is installed on the liquid storage box 51. The input end of the water pump 52 is located in the liquid storage box 51, and the output end of the water pump 52 passes through the upper surface of the washing tank 4 and is fixedly connected with an atomizer 54, and the atomizer 54 is located above the filling frame 91. A return pipe 53 is fixedly connected to the liquid storage box 51, and the return pipe 53 is connected to the purification chamber 22. The two liquid storage boxes 51 are respectively filled with acid and alkali solution, which can be transported to the atomizer 54 through the water pump 52 and sprayed out in the form of mist, and the acid and alkali solution collected in the purification chamber 22 will flow back to the liquid storage box 51 through the return pipe 53 for reuse.

[0048] like Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Fig.11 As shown, the two washing tanks 4 are both provided with a synergistic component 9, which includes a packing frame 91 and a driving shaft 94. The packing frame 91 is fixedly connected to the purification chamber 22. The upper surface and the bottom surface of the packing frame 91 are provided with flow holes 93, through which the acid and alkali solution and VOCs waste gas can enter the packing frame 91 conveniently. The packing frame 91 is provided with a packing ball 92, and the packing ball 92 can improve the contact effect between the acid and alkali solution and the VOCs waste gas. The middle section of the driving shaft 94 is rotatably connected to the packing frame 91, and a stirring rod 96 is fixedly connected to the driving shaft 94, and the stirring rod 96 is located in the packing frame 91. The two driving shafts 94 are connected through a first pulley and a belt transmission. A motor 26 is installed on the washing tank 4, and the motor 26 can be installed on any one of the washing tanks 4. The motor 26 is connected to any one of the driving shafts 94 through a bevel gear, that is, the two driving shafts 94 can be driven simultaneously by the motor 26. Rotation, the stirring rod 96 is fixedly connected with equidistantly arranged raised blocks 97. After the driving shaft 94 rotates, the driving shaft 94 can drive the packing balls 92 to roll in the packing frame 91 through the stirring rod 96 and the raised blocks 97, so that the acid and alkali solution in the packing frame 91 is more uniform, and the attachments on the packing balls 92 will be detached after the packing balls 92 roll, avoiding clogging of the packing balls 92. The bottom end of the driving shaft 94 passes through the shielding cover 25 and is fixedly connected with the fan blades 95, and the fan blades 95 are located in the connecting pipe 24. The driving shaft 94 drives the fan blades 95 to rotate in the connecting pipe 24, which will apply an upward suction to the gas in the water washing chamber 21, so that the VOCs waste gas can flow into the purification chamber 22. The driving shaft 94 is rotatably connected to the shielding cover 25, and the transmission shaft 87 is connected to the driving shaft 94 through the second pulley and the belt. When the driving shaft 94 rotates, it will also drive the transmission shaft 87 to rotate synchronously.

[0049] Working principle:

[0050] First, the VOCs waste gas is pressurized by the air compressor and then transported to the power chamber 28 through the air intake pipe 10. At this time, the baffle 64 under the rotor 62 slides out from the storage groove 63 under the action of gravity, and forms a wind-blocking barrier after contacting the power chamber 28, and the pressurized VOCs waste gas drives the second rotating shaft 61 to rotate through the rotor 62, and then the VOCs waste gas is transported to the heating and purification box 3 through the air guide pipe 11, and the VOCs waste gas entering the heating and purification box 3 is heated and purified by the electric heating rod 12;

[0051] At this time, the second rotating shaft 61 will drive the first rotating disk 71 to rotate, and the first rotating disk 71 will drive the rack 73 to move up and down through the first hinge rod 72 when rotating, and under the action of the transmission gear 74, drive the first rotating shaft 17 to rotate back and forth in a small amplitude, and make the first rotating shaft 17 drive the air guide plate 18 to swing, so as to disperse the VOCs waste gas entering the heating and purification box 3 from the air guide pipe 11, so that the VOCs waste gas contacts multiple places on the electric heating rod 12, which can ensure the heating effect of the VOCs waste gas;

[0052] At the same time, the second rotating shaft 61 will also drive the second rotating disk 77 to rotate, and drive the lifting plate 79 to perform reciprocating lifting motion through the second hinged rod 78, so that the lifting plate 79 drives the first metal plate 13 to perform lifting motion through the guide rod 76, and can automatically complete the bonding and separation of the first metal plate 13 and the second metal plate 14. After the first metal plate 13 and the second metal plate 14 are bonded, the first through hole 15 and the second through hole 16 will be in a closed state, thereby increasing the retention time of the VOCs waste gas in the heating and purification box 3, and after the first metal plate 13 and the second metal plate 14 are separated from each other, the gas can flow through the first through hole 15 and the second through hole 16;

[0053] Then, the VOCs waste gas after heating and purification will enter the first junction box 82 through the gathering pipe 81, and the air in the first junction box 82 will be transported to the inside of the second junction box 83 through the heat dissipation copper tube 85. Since the heat dissipation copper tube 85 is made of copper, it has good thermal conductivity. When the transmission shaft 87 rotates on the mounting seat 86, the spoiler 88 will generate a certain amount of wind to blow onto the heat dissipation copper tube 85, thereby accelerating the heat dissipation of the heat dissipation copper tube 85.

[0054] Subsequently, the VOCs waste gas will enter the two washing tanks 4 in sequence, and the VOCs waste gas will be cooled by the purified water 23. At the same time, the water pump 52 will transport the acid or alkali solution to the atomizer 54, and spray it out in the form of mist to wash and purify the VOCs waste gas entering the purification chamber 22. The VOCs waste gas will enter the packing frame 91 from the lower part of the packing frame 91, and the acid and alkali solution will enter the packing frame 91 from the upper part of the packing frame 91.

[0055] The two drive shafts 94 can also be driven to rotate simultaneously by the motor 26, and the drive shaft 94 drives the packing balls 92 to roll in the packing frame 91 through the stirring rod 96 and the protruding block 97, so that the acid and alkali liquids in the packing frame 91 are more uniform, and the packing balls 92 can also be rolled to remove the attached materials on the packing balls 92, thereby avoiding the packing balls 92 from being blocked;

[0056] Finally, the purified final gas is discharged from the washing tank 4 through the exhaust pipe 27 .

[0057] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A multi-stage washing and absorption VOCs treatment device, comprising a base (1), a power box (2), a heating and purification box (3), two washing tanks (4) and an exhaust pipe (27), characterized in that: A power chamber (28) is provided in the power box (2), an air intake pipe (10) and an air guide pipe (11) are installed on the power box (2), and both the air intake pipe (10) and the air guide pipe (11) are connected to the power chamber (28), and one end of the air guide pipe (11) is fixedly connected to the heating and purification box (3); Two electric heating rods (12) are installed on the heating and purification box (3), a first metal plate (13) and a second metal plate (14) are arranged between the two electric heating rods (12), and the second metal plate (14) is fixedly connected to the heating and purification box (3), a second through hole (16) is opened on the first metal plate (13), and a first through hole (15) is opened on the second metal plate (14), and two first rotating shafts (17) are rotatably connected in the heating and purification box (3), and air guide plates (18) are fixedly connected to the two first rotating shafts (17); The power box (2) is provided with a driving component, which includes a driving component (7) for controlling the flow direction and retention time of the VOCs waste gas in the heating and purification box (3) and a power component (6) for driving the driving component (7) by wind force of the VOCs waste gas in the power chamber (28); A cooling component (8) is provided above the heating and purification box (3) for cooling the heated VOCs waste gas and then transporting it to the washing tank (4); An air supply pipe (19) is provided between the two washing tanks (4), and the air supply pipe (19) is connected to the two washing tanks (4). Conical covers (20) are fixedly connected inside the two washing tanks (4). The space inside the washing tanks (4) is divided into a water washing chamber (21) and a purification chamber (22) by the conical covers (20). Clean water (23) is provided in the water washing chamber (21). A connecting pipe (24) is fixedly connected to the conical covers (20), and a shielding cover plate (25) is fixedly connected to the connecting pipe (24). Two liquid spraying components (5) are arranged on the base (1), and the two liquid spraying components (5) spray acid solution and alkali solution into two purification chambers (22) respectively; The two washing tanks (4) are both provided with a synergistic component (9), the synergistic component (9) comprising a packing frame (91) and a driving shaft (94), the packing frame (91) being fixedly connected to the purification chamber (22), the upper surface and the bottom surface of the packing frame (91) being provided with flow holes (93), the packing frame (91) being provided with packing balls (92), the middle section of the driving shaft (94) being rotatably connected to the packing frame (91), the driving shaft (94) being fixedly connected with a stirring rod (96), and the stirring rod (96) being located in the packing frame (91), the two driving shafts (94) being connected by a first pulley and a belt transmission, the washing tank (4) being provided with a motor (26), the motor (26) being connected by transmission to any one of the driving shafts (94) by a bevel gear.

2. A multi-stage washing and absorption VOCs treatment device according to claim 1, characterized in that: The power assembly (6) comprises a second rotating shaft (61), the second rotating shaft (61) is rotatably connected to the power chamber (28), and both ends of the second rotating shaft (61) are located outside the power box (2), the second rotating shaft (61) is fixedly connected to a rotor (62), the rotor (62) is provided with a circumferential array of receiving grooves (63), a baffle (64) is slidably connected in the receiving groove (63), and one end of the baffle (64) away from the rotor (62) abuts against the inner wall of the power chamber (28).

3. A multi-stage washing and absorption VOCs treatment device according to claim 1, characterized in that: The driving assembly (7) comprises a first rotating disk (71), the first rotating disk (71) is fixedly connected to one end of the second rotating shaft (61), a first hinged rod (72) is hinged on the first rotating disk (71), an end of the first hinged rod (72) away from the first rotating disk (71) is hinged to a rack (73), a sliding groove is provided on the rack (73), a guide block (75) is slidably connected in the sliding groove, and the guide block (75) is fixedly connected to the power box (2).

4. A multi-stage washing and absorption VOCs treatment device according to claim 3, characterized in that: The two first rotating shafts (17) are both fixedly connected with a transmission gear (74), the two transmission gears (74) are both meshed with the rack (73), and the air guide plate (18) is provided with a ventilation hole.

5. The multi-stage washing and absorption VOCs treatment device according to claim 1 is characterized in that: The driving assembly (7) further comprises a second turntable (77), the second turntable (77) being fixedly connected to the other end of the second rotating shaft (61), a second hinged rod (78) being hingedly connected to the second turntable (77), a lifting plate (79) being arranged above the heating and purification box (3), a guide rod (76) being fixedly connected to the bottom surface of the lifting plate (79), the bottom end of the guide rod (76) passing through the heating and purification box (3) and being fixedly connected to the first metal plate (13), and an end of the second hinged rod (78) away from the second turntable (77) being hingedly connected to the lifting plate (79).

6. A multi-stage washing and absorption VOCs treatment device according to claim 1, characterized in that: The cooling component (8) comprises a gathering pipe (81), one end of the gathering pipe (81) is fixedly connected to the upper surface of the heating and purification box (3), the other end of the gathering pipe (81) is fixedly connected to a first junction box (82), a second junction box (83) is arranged on one side of the first junction box (82), the upper surface of the second junction box (83) is fixedly connected to heat dissipation copper tubes (85) arranged at equal intervals, the end of the heat dissipation copper tube (85) away from the second junction box (83) is fixedly connected to the first junction box (82), the bottom surface of the second junction box (83) is fixedly connected to a transfer pipe (84), and the end of the transfer pipe (84) away from the second junction box (83) is fixedly connected to the washing tank (4).

7. A multi-stage washing and absorption VOCs treatment device according to claim 6, characterized in that: The first junction box (82) is fixedly connected to a mounting seat (86), the mounting seat (86) is rotatably connected to a transmission shaft (87), the bottom end of the transmission shaft (87) is fixedly connected to a spoiler (88), and the spoiler (88) is located above the heat dissipation copper tube (85), and the transmission shaft (87) is transmission-connected to a drive shaft (94) via a second pulley and a belt.

8. The multi-stage washing and absorption VOCs treatment device according to claim 1 is characterized in that: The liquid spraying assembly (5) comprises a liquid storage box (51), a water pump (52) is installed on the liquid storage box (51), an input end of the water pump (52) is located in the liquid storage box (51), an output end of the water pump (52) passes through the upper surface of the washing tank (4) and is fixedly connected to an atomizer (54), and the atomizer (54) is located above the filling frame (91), and a return pipe (53) is fixedly connected to the liquid storage box (51), and the return pipe (53) is connected to the purification chamber (22).

9. The multi-stage washing and absorption VOCs treatment device according to claim 1 is characterized in that: The stirring rod (96) is fixedly connected with raised blocks (97) arranged at equal intervals. The bottom end of the driving shaft (94) passes through the shielding cover plate (25) and is fixedly connected with a fan blade (95). The fan blade (95) is located in the connecting pipe (24). The driving shaft (94) is rotatably connected with the shielding cover plate (25).

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