VOCs waste gas treatment equipment

Abstract

The invention belongs to the technical field of waste gas treatment, and particularly relates to VOCs waste gas treatment equipment which comprises an adsorption tank, a switching groove is formed in the middle of a mounting column, a desorption input pipe is mounted at the other end of the switching groove in a communicating mode, two stopping blocks are symmetrically mounted in the switching groove, and first rotating shafts are symmetrically and rotationally mounted in the switching groove; a baffle is fixedly mounted on the first rotating shaft, an L-shaped arc plate is slidably connected to the mounting column, a sliding groove is formed in the mounting column, a spring is mounted between the sliding groove and the L-shaped arc plate, partition plates are mounted at the upper end and the lower end of the mounting column, and a one-way ventilation groove is formed in the mounting column; according to the device, high-concentration VOCs gas can be primarily purified through a photocatalyst and then subjected to an adsorption reaction with the activated carbon plate, the VOCs gas can be better adsorbed, the treatment effect can be improved, meanwhile, the output direction of desorption gas and waste gas can be switched through the output end switching assembly, the waste gas is input downwards, the desorption gas is input upwards, and the desorption gas is input upwards. The practical application is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas treatment, and specifically relates to a VOCs waste gas treatment device. Background Art

[0002] VOCs in the ordinary sense refers to volatile organic compounds. According to the definition of the World Health Organization, VOCs are compounds with a boiling point of 50℃-260℃ under normal pressure of 101.32 kPa, that is, they exist in the form of gas at room temperature; but the definition in the environmental sense refers to a class of active volatile organic compounds, that is, those that can cause harm.

[0003] The volatilization of VOCs can cause air pollution, indoor air pollution, participate in the formation of ozone and fine particulate matter, harm the ecosystem, and may have adverse effects on human health, so VOCs gases need to be treated and recovered. The existing VOCs gas treatment usually uses activated carbon adsorption for adsorption treatment, but the activated carbon method is suitable for treating low-concentration, large-volume exhaust gas. When the exhaust gas concentration is high, the adsorption material needs to be replaced frequently, the treatment cost is high, and there is also the problem of incomplete adsorption, so it needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a VOCs waste gas treatment device to solve the problems existing in the background technology.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows: A VOCs waste gas treatment device comprises an adsorption tank, a pressurizing device, a zeolite rotor and a distillation device, wherein the pressurizing device is connected to the zeolite rotor, the zeolite rotor is connected to the adsorption tank, and the output end of the adsorption tank is connected to the distillation device. The lower end of the adsorption tank is provided with a water outlet, the water outlet is provided with a water blocking component, the center of the adsorption tank is provided with an exhaust gas input pipe connected to the output end of the zeolite wheel, and the center of the adsorption tank is provided with an output end switching component; The output end switching assembly includes a mounting column fixedly mounted on the adsorption tank, a switching slot connected to the exhaust gas input pipe is provided in the middle of the mounting column, a desorption input pipe is connected and installed at the other end of the switching slot, two blocking blocks are axially symmetrically installed inside the switching slot, a first rotating shaft is symmetrically rotated inside the switching slot, a baffle is fixedly installed on the first rotating shaft, an L-shaped arc plate is slidably connected to the mounting column, a sliding groove matching the L-shaped arc plate is provided on the mounting column, a spring is installed between the sliding groove and the L-shaped arc plate, partition plates are installed at both upper and lower ends of the mounting column, and a one-way ventilation groove is provided on the mounting column between the baffle and the L-shaped arc plate; The two baffles are connected to each other by transmission, and a conveying pipeline is provided on the inner wall of the adsorption tank. An activated carbon plate is installed on the upper end of the upper partition plate, a catalyst carrier plate is installed on the lower end of the lower partition plate, and an ultraviolet light tube is installed at the lower part of the adsorption tank.

[0006] The one-way blocking member includes a guide plate fixedly installed inside the switching slot, a slide plate is symmetrically slidably connected inside the guide plate, two slide plates extend out of the guide plate and abut against the baffle, and a first spring is fixedly installed on the slide plate.

[0007] A circular groove connected to the one-way ventilation groove is provided inside the partition plate, and circular holes connected to the circular groove are provided on the sides of the two partition plates away from each other, and the circular groove on the upper side is connected to the conveying pipeline.

[0008] The water blocking assembly includes a water blocking block matching the water outlet, an installation groove is provided inside the water blocking block, a second spring is installed on the lower side of the installation groove, a sealing block is sealingly and slidably connected to the lower end of the second spring, the sealing block is made of buoyancy material, one-way water inlet channels are provided on the left and right sides of the water blocking block, a connecting groove connected front and back is provided on the lower end of the sealing block, one-way water outlet channels connected to the connecting groove are provided on the front and back sides of the water blocking block, and a waterproof telescopic cylinder is installed on the lower end of the water blocking block.

[0009] The sealing block has inclined surfaces on the left and right sides.

[0010] A transmission shaft is rotatably installed inside the switching slot, a transmission plate matching the switching slot is installed on the side of the transmission shaft, a reduction assembly is installed on the output end of the transmission shaft, a rotating column is transmission-connected to the output end of the reduction assembly, and the catalyst carrier plate is installed on the peripheral side of the rotating column.

[0011] The reduction assembly includes a first gear fixedly mounted on the transmission shaft, the first gear is rotatably mounted on the mounting column, a gear ring is rotatably mounted on the lower partition plate, a second gear meshing with the gear ring and the first gear is rotatably mounted on the lower end of the mounting column, and a water-blocking plate is fixedly mounted between the lower end of the gear ring and the rotating column.

[0012] The catalyst carrier plate includes a spiral plate, which is fixedly mounted on a rotating column, a hollow groove is opened in the middle of the spiral plate, air holes are opened through the spiral plate, the hollow groove is filled with catalyst particles, and the ultraviolet light tube matches the spiral plate.

[0013] The present invention can perform preliminary purification through photocatalyst and high-concentration VOCs gas, thereby reducing the concentration of high-concentration VOCs gas, so that it can undergo adsorption reaction with activated carbon plate, better adsorb VOCs gas and improve treatment effect. At the same time, the output direction of desorption gas and waste gas can be switched through the output end switching component, so that the waste gas is input downward and the desorption gas is input upward, which is convenient for practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0015] Figure 1 This is a schematic structural diagram of a VOCs waste gas treatment device of the present invention; Figure 2 It is a structural schematic diagram of the adsorption tank of the present invention; Figure 3 It is a schematic diagram of the first cross-sectional structure of the adsorption tank of the present invention; Figure 4 It is a schematic diagram of the second cross-sectional structure of the adsorption tank of the present invention; Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle; Figure 6 It is a third cross-sectional structural schematic diagram of the adsorption tank of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure at B in the middle; Figure 8 for Figure 6 Schematic diagram of the enlarged structure at C in the middle; Fig. 9 It is a fourth cross-sectional structural schematic diagram of the adsorption tank of the present invention; Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at D in the middle; Fig.11 It is a fifth cross-sectional structural schematic diagram of the adsorption tank of the present invention; Fig.12 for Fig.11 Schematic diagram of the enlarged structure at E in the middle.

[0016] The main component symbols are described as follows: Adsorption tank 1, pressurizing equipment 11, zeolite rotor 12, distillation equipment 13, exhaust gas input pipe 14, desorption input pipe 15, blocking block 16, guide plate 17, slide plate 18, first spring 19, mounting column 2, delivery pipeline 20, switching groove 21, first rotating shaft 22, baffle 23, L-shaped arc plate 24, spring 25, partition plate 26, one-way ventilation groove 27, activated carbon plate 28, catalyst carrier plate 29, ultraviolet light tube 30, water blocking block 31, second spring 32, sealing block 33, one-way water inlet channel 34, connecting groove 35, one-way water outlet channel 36, circular hole 37, transmission shaft 40, transmission plate 41, rotating column 42, first gear 43, gear ring 44, second gear 45, water baffle 46, spiral plate 50. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Example 1: Figure 1-12 As shown, a VOCs waste gas treatment device of the present invention includes an adsorption tank 1, a pressurizing device 11, a zeolite rotor 12 and a distillation device 13, the pressurizing device 11 is connected to the zeolite rotor 12, the zeolite rotor 12 is connected to the adsorption tank 1, and the output end of the adsorption tank 1 is connected to the distillation device 13. A water outlet is installed at the lower end of the adsorption tank 1, and a water blocking component is installed at the water outlet. An exhaust gas input pipe 14 is installed in the center of the adsorption tank 1 and connected to the output end of the zeolite wheel 12. An output end switching component is installed in the center of the adsorption tank 1; The output end switching assembly includes a mounting column 2 fixedly mounted on the adsorption tank 1, a switching slot 21 connected to the exhaust gas input pipe 14 is provided in the middle of the mounting column 2, the other end of the switching slot 21 is connected to the desorption input pipe 15, two blocking blocks 16 are axially symmetrically installed inside the switching slot 21, a first rotating shaft 22 is symmetrically rotated inside the switching slot 21, a baffle 23 is fixedly installed on the first rotating shaft 22, an L-shaped arc plate 24 is slidably connected to the mounting column 2, a sliding groove matching the L-shaped arc plate 24 is provided on the mounting column 2, a spring 25 is installed between the sliding groove and the L-shaped arc plate 24, partition plates 26 are installed at both upper and lower ends of the mounting column 2, and a one-way ventilation groove 27 located between the baffle 23 and the L-shaped arc plate 24 is provided on the mounting column 2; The two baffles 23 are a one-way blocking member connected by common transmission. A conveying pipe 20 is opened on the inner wall of the adsorption tank 1. An activated carbon plate 28 is installed on the upper end of the upper partition plate 26, a catalyst carrier plate 29 is installed on the lower end of the lower partition plate 26, and an ultraviolet light tube 30 is installed at the lower part of the adsorption tank 1.

[0019] When treating and recovering VOCs waste gas, the waste gas is first pre-treated, including filtering and cooling, and then enters the zeolite wheel 12 through a pipeline for concentration. The temperature of the concentrated gas becomes higher, and then it is condensed and pressurized by the pressure device 11 and then passed into the air collecting box. After the air collecting box, it is distributed to several working adsorption tanks for adsorption and purification; two partition plates 26 divide the adsorption tank 1 into an upper low-concentration adsorption space, namely the activated carbon adsorption space and a lower high-concentration adsorption space, namely the photocatalyst adsorption space; in this way, high-concentration VOCs waste gas is preferentially allowed to enter the lower photocatalyst adsorption space for adsorption, and then when the conveying pressure drops, the waste gas is squeezed through the conveying pipe 20 to enter the upper activated carbon adsorption space for adsorption, which can avoid the activated carbon plate directly contacting the high-concentration waste gas to cause incomplete adsorption, and at the same time, the adsorption effect of the waste gas can be improved through the combination of photocatalyst and activated carbon.

[0020] When the pre-treated exhaust gas enters the switching slot 21 inside the adsorption tank 1 through the exhaust gas input pipe 14, due to the obstruction of the blocking block 16, the baffle 23 can only rotate in one direction, that is, overcome the rotation of the spring 25 to connect the exhaust gas input pipe 14 with the switching slot 21, and then through the transmission of the baffle 23, the one-way blocking member connected to the baffle 23 limits the baffle 23 on the other side from rotating, so that the exhaust gas enters the switching slot 21 and then enters the lower part of the adsorption tank 1 from the one-way ventilation slot 27 on the same side to react with the catalyst carrier 29. When the catalyst carrier plate 29 is working, the exhaust gas passing through the catalyst carrier plate 29 will be squeezed through the inside of the conveying pipe 20, and then transported upward, so that the initially adsorbed exhaust gas enters the lower side of the activated carbon plate 28 at the upper part of the adsorption tank 1, and then the initially adsorbed low-concentration exhaust gas is adsorbed by the upward activated carbon plate 28, and then discharged from the exhaust port at the upper end of the adsorption tank 1. When the catalyst carrier plate 29 is working, the irradiation of the ultraviolet light tube 30 needs to be turned on, so that the catalyst absorbs light energy, the electron valence band transitions to the conduction band, forms electron-hole pairs, and reacts with VOCs molecules; When the activated carbon plate 28 is saturated with adsorption, it is necessary to desorb the activated carbon plate 28. At this time, the desorbed gas enters the switching slot 21 through the desorption input pipe, which will drive the L-shaped arc plate 24 to overcome the rotation of the spring 25 and limit the baffle 23 on the other side through the one-way blocking member, so that the one-way ventilation slot 27 on the same side will leak out, and the desorbed gas can only be output upward through the one-way ventilation slot 27 on this side. In this way, the desorbed gas directly contacts and reacts with the activated carbon plate 28 and is discharged upward.

[0021] After the adsorption is completed, the water blocking component can be opened to discharge the solution generated inside the adsorption tank 1; The present invention can perform preliminary purification through photocatalyst and high-concentration VOCs gas, thereby reducing the concentration of high-concentration VOCs gas, so that it can undergo adsorption reaction with activated carbon plate, better adsorb VOCs gas and improve treatment effect. At the same time, the output direction of desorption gas and waste gas can be switched through the output end switching component, so that the waste gas is input downward and the desorption gas is input upward, which is convenient for practical application.

[0022] The one-way blocking member includes a guide plate 17 fixedly installed inside the switching slot 21 , and a slide plate 18 is symmetrically slidably connected inside the guide plate 17 . The two slide plates 18 extend out of the guide plate 17 and abut against the baffle 23 . The slide plate 18 is fixedly installed with a first spring 19 .

[0023] In the initial state, the first spring 19 makes the slide plate 18 extend outward and abut against the baffle plate 23. The baffle plate 23 remains stable under the restriction of the spring 25 and the blocking block 16, and separates the switching slot 21. When the L-shaped arc plate 24 on one side overcomes the spring 25 to rotate, it will drive the slide plate 18 on that side to overcome the first spring 19 and move inward until the slide plate 18 on that side abuts against the slide plate 18 on the other side, that is, the slide plate 18 on the other side cannot slide under the abutment of the slide plate 18 on this side, so that the baffle plate 23 on the other side cannot rotate. In this way, the gas on this side enters the switching slot 21 and is guided by the guide plate 17 through the slide plate 18 on the other side and is finally output from the one-way ventilation groove 27 on this side. When the gas output is completed, the L-shaped arc plate 24 will be free of force and will return to its initial state under the rebound force of the spring 25. At the same time, the slide plate 18 will also return to its initial state under the rebound force of the first spring 19 and abut against the baffle plate 23.

[0024] Embodiment 2: Further improvement is made on the basis of Embodiment 1, the water blocking assembly includes a water blocking block 31 matching the water outlet, an installation groove is opened inside the water blocking block 31, a second spring 32 is installed on the lower side of the installation groove, the lower end of the second spring 32 is sealingly and slidably connected with a sealing block 33, the sealing block 33 is made of buoyancy material, a one-way water inlet channel 34 is opened on the left and right sides of the water blocking block 31, a connecting groove 35 connected front and back is opened at the lower end of the sealing block 33, a one-way water outlet channel 36 connected to the connecting groove 35 is opened on the front and rear sides of the water blocking block 31, and a waterproof telescopic cylinder is installed at the lower end of the water blocking block 31.

[0025] In the initial state, the output end of the waterproof telescopic cylinder is flush with the mounting groove. At this time, the waterproof telescopic cylinder will not affect the movement of the sealing block 33. At the same time, the sealing block 33 is kept in contact with the bottom of the mounting groove under the action of the second spring 32. When the catalyst and the exhaust gas oxidize to generate water, the aqueous solution will be stored in the lower part of the adsorption tank 1. Since the sealing block 33 is made of buoyancy material, and the aqueous solution will enter the mounting groove through the one-way water inlet channel 34, when the water level of the aqueous solution gradually increases, the sealing block 33 will be driven to overcome the second spring 32 and move upward under the action of buoyancy, and then the aqueous solution will enter the connecting groove 35. As the aqueous solution gradually increases, the sealing block 33 can no longer move upward, and the aqueous solution will enter the one-way water outlet channel 36 from the connecting groove 35 and be discharged, so as to prevent the aqueous solution in the adsorption tank 1 from soaking the catalyst carrier plate 29; When the activated carbon plate 28 is desorbed, an organic solvent is generated. At this time, the output end of the waterproof telescopic cylinder can be driven upward to abut against the sealing block 33, and the connecting groove 35 is connected to the one-way water outlet channel 36, so that the organic solution can be directly discharged and input into the subsequent distillation equipment 13 for treatment.

[0026] The sealing block 33 has inclined surfaces on its left and right sides. The inclined surfaces enable the solution to enter the installation groove better.

[0027] A circular groove connected to the one-way ventilation groove 27 is provided inside the partition plate 26, and circular holes 37 connected to the circular groove are provided on the side away from each other of the two partition plates 26, and the upper circular groove is connected to the delivery pipe 20. When the gas enters the circular groove, it can be discharged from a plurality of circular holes 37, and then can be uniformly discharged downward or upward, and the organic solvent generated by desorption will be collected in the upper circular groove and then transported downward from the delivery pipe 20 to the lower part of the adsorption tank 1 and finally discharged from the water blocking component.

[0028] A transmission shaft 40 is rotatably installed inside the switching slot 21, and a transmission plate 41 matching the switching slot 21 is installed on the side of the transmission shaft 40. A reduction assembly is installed at the output end of the transmission shaft 40, and a rotating column 42 is transmission-connected to the output end of the reduction assembly. The catalyst carrier plate 29 is installed around the rotating column 42.

[0029] When the switching slot 21 is transporting gas, the gas will drive the transmission plate 41 to rotate, and then drive the transmission shaft 40 to rotate, and decelerate through the reduction component, which can be a gear reducer, so that the transmission shaft 40 drives the rotating column 42 and the catalyst carrier plate 29 to rotate, thereby improving the contact efficiency between the exhaust gas and the catalyst carrier plate 29, thereby improving the purification effect.

[0030] The reduction assembly includes a first gear 43 fixedly mounted on the transmission shaft 40, the first gear 43 is rotatably mounted on the mounting column 2, a gear ring 44 is rotatably mounted on the lower partition plate 26, a second gear 45 meshing with the gear ring 44 and the first gear 43 is rotatably mounted on the lower end of the mounting column 2, and a water-blocking plate 46 is fixedly mounted between the lower end of the gear ring 44 and the rotating column 42.

[0031] The transmission shaft 40 drives the first gear 43 to rotate, and then drives the second gear 45 to rotate through the first gear 43. Since the second gear 45 is larger than the first gear 43, this process is a deceleration process. At the same time, the rotation of the second gear 45 will drive the gear ring 44 and the water-blocking plate 46 to rotate. The size of the gear ring 44 and the coordination of the second gear 45 can also play a deceleration role, thereby making the rotating column 42 slowly drive the catalyst carrier 29 to rotate.

[0032] The catalyst carrier plate 29 includes a spiral plate 50, which is fixedly mounted on the rotating column 42. A hollow groove is provided in the middle of the spiral plate 50, and air holes are provided through the spiral plate 50. The hollow groove is filled with catalyst particles, and the ultraviolet tube 30 matches the spiral plate 50. The catalyst carrier plate 29 in a spiral state can fully cover the path of the exhaust gas from top to bottom, and the contact efficiency between the exhaust gas and the spiral plate 50 can be improved by cooperating with the rotating spiral plate 50. The ultraviolet tube 30 arranged in the same spiral can match the spiral plate 50, and the spiral plate 50 can also increase the irradiation range of the ultraviolet tube 30 during the rotation process.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A VOCs waste gas treatment device, comprising an adsorption tank, a pressurizing device, a zeolite rotor and a distillation device, wherein the pressurizing device is connected to the zeolite rotor, the zeolite rotor is connected to the adsorption tank, and the output end of the adsorption tank is connected to the distillation device, characterized in that: The lower end of the adsorption tank is provided with a water outlet, the water outlet is provided with a water blocking component, the center of the adsorption tank is provided with an exhaust gas input pipe connected to the output end of the zeolite wheel, and the center of the adsorption tank is provided with an output end switching component; The output end switching assembly includes a mounting column fixedly mounted on the adsorption tank, a switching slot connected to the exhaust gas input pipe is provided in the middle of the mounting column, a desorption input pipe is connected and installed at the other end of the switching slot, two blocking blocks are axially symmetrically installed inside the switching slot, a first rotating shaft is symmetrically rotated inside the switching slot, a baffle is fixedly installed on the first rotating shaft, an L-shaped arc plate is slidably connected to the mounting column, a sliding groove matching the L-shaped arc plate is provided on the mounting column, a spring is installed between the sliding groove and the L-shaped arc plate, partition plates are installed at both upper and lower ends of the mounting column, and a one-way ventilation groove is provided on the mounting column between the baffle and the L-shaped arc plate; The two baffles are connected to each other by transmission, and a conveying pipeline is provided on the inner wall of the adsorption tank. An activated carbon plate is installed on the upper end of the upper partition plate, a catalyst carrier plate is installed on the lower end of the lower partition plate, and an ultraviolet light tube is installed at the lower part of the adsorption tank.

2. A VOCs waste gas treatment device according to claim 1, characterized in that: The one-way blocking member includes a guide plate fixedly installed inside the switching slot, a slide plate is symmetrically slidably connected inside the guide plate, two slide plates extend out of the guide plate and abut against the baffle, and a first spring is fixedly installed on the slide plate.

3. A VOCs waste gas treatment device according to claim 1, characterized in that: A circular groove connected to the one-way ventilation groove is provided inside the partition plate, and circular holes connected to the circular groove are provided on the sides of the two partition plates away from each other, and the circular groove on the upper side is connected to the conveying pipeline.

4. A VOCs waste gas treatment device according to claim 3, characterized in that: The water blocking assembly includes a water blocking block matching the water outlet, an installation groove is provided inside the water blocking block, a second spring is installed on the lower side of the installation groove, a sealing block is sealingly and slidably connected to the lower end of the second spring, the sealing block is made of buoyancy material, one-way water inlet channels are provided on the left and right sides of the water blocking block, a connecting groove connected front and back is provided on the lower end of the sealing block, one-way water outlet channels connected to the connecting groove are provided on the front and back sides of the water blocking block, and a waterproof telescopic cylinder is installed on the lower end of the water blocking block.

5. A VOCs waste gas treatment device according to claim 4, characterized in that: The sealing block has inclined surfaces on the left and right sides.

6. A VOCs waste gas treatment device according to claim 5, characterized in that: A transmission shaft is rotatably installed inside the switching slot, a transmission plate matching the switching slot is installed on the side of the transmission shaft, a reduction assembly is installed on the output end of the transmission shaft, a rotating column is transmission-connected to the output end of the reduction assembly, and the catalyst carrier plate is installed on the peripheral side of the rotating column.

7. A VOCs waste gas treatment device according to claim 6, characterized in that: The reduction assembly includes a first gear fixedly mounted on the transmission shaft, the first gear is rotatably mounted on the mounting column, a gear ring is rotatably mounted on the lower partition plate, a second gear meshing with the gear ring and the first gear is rotatably mounted on the lower end of the mounting column, and a water-blocking plate is fixedly mounted between the lower end of the gear ring and the rotating column.

8. A VOCs waste gas treatment device according to claim 6, characterized in that: The catalyst carrier plate includes a spiral plate, which is fixedly mounted on a rotating column, a hollow groove is opened in the middle of the spiral plate, air holes are opened through the spiral plate, the hollow groove is filled with catalyst particles, and the ultraviolet light tube matches the spiral plate.

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