Skid-mounted VOC waste gas treatment equipment

Abstract

The invention relates to the technical field of waste gas purification treatment, and discloses skid-mounted VOC waste gas treatment equipment which comprises an outer shell, an inner treatment bin and a spraying mechanism, the inner treatment bin is arranged in the outer shell, a spraying chamber, a filtration and adsorption chamber and a degradation chamber are sequentially arranged in the inner treatment bin, the two ends of the outer shell are communicated with a gas inlet pipeline and a gas outlet pipeline respectively, the gas inlet pipeline is communicated with the spraying chamber, and the gas outlet pipeline is communicated with the degradation chamber. According to the spraying mechanism provided by the invention, a rotatable switching form of a double-aperture nozzle is adopted, so that dynamic adaptation of a spraying mode and a VOC waste gas type is realized, and the gas-liquid contact efficiency and the particulate matter anti-blocking capability are improved; and self-adaptive plugging control over the spray head is achieved by arranging the self-adaptive plugging piece, spray head opening and closing sealing and spray hole self-cleaning are synchronously completed in the spray head switching process, the continuity and stability of spray operation are ensured, and the problems that an existing fixed-aperture spray head is prone to being insufficient in atomization effect and prone to being blocked are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification treatment, and more specifically, it relates to a skid-mounted VOC waste gas treatment device. Background Art

[0002] VOC waste gas refers to industrial or domestic emission gases containing volatile organic compounds. These compounds are easily volatilized into the air at normal temperature and are commonly found in the production processes of industries such as petrochemical, painting, and printing, as well as sources such as building decoration materials and automobile exhaust. VOCs not only cause photochemical smog and ozone pollution, harming the ecological environment, but some of their components (such as benzene and formaldehyde) are also carcinogenic and irritating, and long-term exposure can damage human health.

[0003] Currently, the process of treating VOC waste gas in the prior art generally includes steps such as spraying, filtration adsorption, and degradation. Among them, the spraying mechanism used in the spraying link mostly adopts a fixed spraying mode. For example, a VOC waste gas absorption and purification device disclosed in the patent with the publication number CN206325367U has a single nozzle aperture and cannot be dynamically adjusted according to the type of waste gas, resulting in limited treatment efficiency. For example, when treating hydrophobic or particulate-containing waste gas, the fixed-aperture nozzles are prone to insufficient atomization effect or blockage problems, and frequent shutdowns for maintenance are required. Summary of the Invention

[0004] The purpose of the present invention is to provide a skid-mounted VOC waste gas treatment device to solve the above-mentioned technical problems.

[0005] The present invention solves the above-mentioned existing technical problems through the following technical solutions:

[0006] The present invention provides a skid-mounted VOC waste gas treatment device, including:

[0007] An outer housing, an inner treatment chamber, and a spraying mechanism;

[0008] The inner treatment chamber is arranged inside the outer housing, and a spraying chamber, a filtration adsorption chamber, and a degradation chamber are sequentially arranged therein. The two ends of the outer housing are respectively connected to an intake pipe and an outlet pipe. The intake pipe is connected to the spraying chamber, and the outlet pipe is connected to the degradation chamber;

[0009] The spraying mechanism includes a rotation driving assembly and spray heads arranged at the upper end of the spraying chamber;

[0010] Each spray head includes a main pipe and two sleeves rotatably arranged at both ends of the main pipe. Two nozzles with different apertures are symmetrically connected up and down on the outer side of the sleeve;

[0011] An adaptive blocking member is arranged inside the nozzle for automatically blocking the spraying channel when the nozzle switches to a non-use position;

[0012] The rotation drive assembly is connected to the two sleeves and is used to drive the two sleeves to rotate synchronously at the end of the main pipe to switch the positions of the upper and lower nozzles.

[0013] Preferably, the adaptive plugging member includes a support gasket fixed inside the nozzle and a plugging slider sliding on the support gasket, and a plurality of through holes for the circulation of the spraying solution are provided on the support gasket.

[0014] Preferably, the adaptive plugging member further includes a movable rod fixed to one end of the plugging slider and a pressing block fixed below the end of the main pipe. A ball that is in rolling contact with the pressing block is provided at the end of the movable rod, and a return spring is fixed between the plugging slider and the support gasket.

[0015] Preferably, a cleaning member connected to the plugging slider is provided inside the nozzle, and the cleaning member includes cleaning rods corresponding to the spraying holes of the nozzle one by one.

[0016] Preferably, the rotation drive assembly includes a drive motor, two corresponding tooth rings fixed at the upper ends of the sleeves, and a gear shaft transmission member. The drive end of the drive motor is respectively in transmission connection with the two tooth rings through the gear shaft transmission member.

[0017] Preferably, the gear shaft transmission member includes a rotating rod, two first gears, and two second gears. The rotating rod is rotatably installed below the main pipe. The two first gears are respectively fixed to the drive end of the drive motor and the outer side of the rotating rod. The two second gears are respectively fixed to both ends of the rotating rod and are respectively meshed with the two tooth rings correspondingly.

[0018] Preferably, the end of the cleaning rod is of a conical structure, and its outer diameter matches the inner diameter of the spraying hole of the nozzle.

[0019] Preferably, the two nozzles are divided into a large-aperture nozzle and a small-aperture nozzle. The large-aperture nozzle is used to treat the waste gas containing particulate matter, and the small-aperture nozzle is used to treat the hydrophobic waste gas.

[0020] Preferably, a filter adsorption layer is provided inside the filter adsorption chamber for adsorbing particulate matter in the waste gas.

[0021] Preferably, a degradation solution is provided inside the degradation chamber for decomposing harmful substances in the waste gas.

[0022] The beneficial effects of the present invention are as follows:

[0023] The spraying mechanism provided by the present invention adopts a rotatable switching form of double-aperture nozzles, realizing the dynamic adaptation of the spraying mode and the type of VOC waste gas, improving the gas-liquid contact efficiency and the anti-blocking ability of particulate matter. By setting an adaptive sealing member, the adaptive sealing control of the nozzle is realized, and the opening and closing sealing of the nozzle and the self-cleaning of the spraying holes are synchronously completed during the nozzle switching process, ensuring the continuity and stability of the spraying operation, and solving the problems of insufficient atomization effect and easy blockage of the existing fixed-aperture nozzles. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a skid-mounted VOC waste gas treatment device provided by the present invention;

[0025] Figure 2 is a schematic internal structural diagram of a skid-mounted VOC waste gas treatment device provided by the present invention;

[0026] Figure 3 is a schematic structural diagram of a spray head in a skid-mounted VOC waste gas treatment device provided by the present invention;

[0027] Figure 4 is a sectional view between the nozzle and the sleeve in a skid-mounted VOC waste gas treatment device provided by the present invention;

[0028] Figure 5 is the present invention Figure 4 partial enlarged schematic view of part A;

[0029] Figure 6 is a schematic structural diagram between the rotary drive assembly and the sleeve in a skid-mounted VOC waste gas treatment device provided by the present invention.

[0030] In the figure: 1. Outer shell; 11. Intake pipe; 12. Exhaust pipe; 2. Inner treatment chamber; 21. Spraying chamber; 22. Filtering and adsorption chamber; 23. Degradation chamber; 3. Spraying mechanism; 31. Delivery pump; 32. Blending tank; 33. Rotary drive assembly; 331. Driving motor; 332. Tooth ring; 333. Rotating rod; 334. First gear; 335. Second gear; 34. Spray head; 341. Main pipe; 342. Sleeve; 343. Nozzle; 344. Support gasket; 345. Sealing slider; 346. Movable rod; 347. Extrusion block; 348. Ball; 349. Return spring; 3410. Cleaning member; 4. Filtering and adsorption layer. Detailed Embodiments

[0031] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and that changes can be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example may omit, substitute, or add various processes or components as needed. In addition, the features described for some examples may also be combined in other examples.

[0032] Please refer to Figure 1 and Figure 2 , a skid-mounted VOC waste gas treatment device, comprising: an outer shell 1, an inner treatment chamber 2, a spraying mechanism 3, and a filtration and adsorption layer 4; wherein, the inner treatment chamber 2 is arranged inside the outer shell 1, and a spraying chamber 21, a filtration and adsorption chamber 22, and a degradation chamber 23 are sequentially arranged therein. An intake pipe 11 and an outlet pipe 12 are respectively installed at the left and right ends of the outer shell 1. The intake pipe 11 is communicated with the upper end of the spraying chamber 21, and the outlet pipe 12 is communicated with the upper end of the degradation chamber 23. The lower end of the spraying chamber 21 is communicated with the lower end of the filtration and adsorption chamber 22. The waste gas enters the spraying chamber 21 from the intake pipe 11 first. The filtration and adsorption layer 4 is arranged in the filtration and adsorption chamber 22. The filtration and adsorption layer 4 is composed of a plurality of activated carbon plates arranged in parallel up and down. The activated carbon plates are detachably installed in the filtration and adsorption chamber 22. The upper end of the filtration and adsorption chamber 22 is communicated with the lower end of the degradation chamber 23 through a diversion pipe. A degradation solution is arranged in the degradation chamber 23 for decomposing harmful substances in the waste gas.

[0033] When purifying and treating the waste gas, the spraying mechanism 3 is used to spray the waste gas first to reduce the temperature and adjust the humidity of the waste gas. Then the waste gas enters the filtration and adsorption chamber 22 and passes through the filtration and adsorption layer 4 in sequence to adsorb and filter out the fine particles inside. The filtered waste gas enters the degradation chamber 23 and reacts with the degradation solution in the degradation chamber 23 to decompose the harmful substances in the waste gas. Finally, the waste gas is discharged through the outlet pipe 12, and the entire waste gas purification and treatment is completed.

[0034] Specifically, please refer to Figures 3 to 4, the spraying mechanism 3 includes: a delivery pump 31, a preparation tank 32, a rotary drive assembly 33, and a spray head 34 provided at the upper end of the spray chamber 21. The preparation tank 32 is respectively connected to the delivery pump 31 and the spray head 34 through pipelines. The preparation tank 32 is used to prepare the required spraying solution. Since it belongs to the prior art, its specific structure will not be described in detail here; the spray head 34 includes a main pipeline 341 and two sleeves 342 rotatably connected to both ends of the main pipeline 341. The middle of the top of the main pipeline 341 is connected to the bottom of the preparation tank 32 through a pipeline, and the sleeve 342 is connected to the main pipeline 341; two spray nozzles 343 with different apertures are symmetrically connected to the outside of the sleeve 342 up and down. The spray nozzles 343 with different apertures are used to adapt to different types of VOC waste gas, and the spray nozzles 343 are all made of corrosion-resistant materials such as ceramics and Hastelloy; an adaptive plugging member is provided in the spray nozzle 343. When the spray nozzle 343 is not in use, the spray nozzle 343 is plugged by the adaptive plugging member to prevent the spraying solution from spraying out; the rotary drive assembly 33 is used to drive the two sleeves 342 to rotate synchronously at the end of the main pipeline 341, so that the positions of the spray nozzles 343 with different apertures are swapped. The two spray nozzles 343 are divided into a large aperture and a small aperture. The large aperture is used to treat waste gas containing particulate matter, and the small aperture is used to treat hydrophobic waste gas.

[0035] When the above-mentioned spraying mechanism 3 is in use, first select a suitable spraying mode according to the type of VOC waste gas. Generally speaking, the types of VOC waste gas include hydrophilic (such as formaldehyde, ethanol, acetone), hydrophobic (such as benzene, toluene, xylene), acid / corrosive (such as chlorobenzene, hydrogen sulfide, acetic acid), and particulate-containing type (such as spray painting waste gas (such as paint mist, dust), etc.). For hydrophilic VOC waste gas, it is easily soluble in water and has a high mass transfer efficiency. Therefore, either a large-aperture or small-aperture spray head 343 can be selected. For hydrophobic VOC waste gas, since it is difficult to dissolve in water, it is necessary to strengthen the gas-liquid contact and increase the atomization surface area. At this time, a small-aperture spray head 343 needs to be used. For particulate-containing VOC waste gas, the particles in it are likely to block the aperture, and a large-aperture spray head 343 needs to be selected. Based on the above usage rules, determine whether to use a large-aperture or small-aperture spray head 343. Since the spray head 343 at the lower part is in the use state, while the spray head 343 at the upper part is in the non-use state, it is necessary to first determine whether the required spray head 343 is at the upper or lower part. If it is at the lower part, directly start spraying. If it is at the upper part, it needs to be adjusted to the lower part. At this time, the rotation drive assembly 33 is used to drive the two sleeves 342 to rotate synchronously, so that the spray heads 343 at the top and bottom of the sleeve 342 rotate synchronously. When the sleeve 342 rotates 180 degrees, the upper and lower spray heads 343 are exactly swapped. At the same time, the adaptive plugging member inside the spray head 343 at the lower part synchronously opens it, while the adaptive plugging member inside the spray head 343 at the upper part synchronously closes it. Then, by opening the valve on the dispensing tank 32, the spraying operation can be started, so that the spraying solution is sprayed out through the two spray heads 343 at the lower part. At the same time, the VOC waste gas to be treated is introduced into the spraying chamber 21 through the intake pipe 11, and the spraying operation is started; thus, when the present invention performs spraying treatment, it can select a suitable spraying method according to the specific type of VOC waste gas to be treated, so as to ensure effective spraying treatment of the VOC waste gas and achieve the purpose of improving the spraying efficiency. Compared with the existing device with a fixed spraying mode, the present invention is more flexible and has stronger adaptability when in use.

[0036] Please refer to Figures 4 to 5 , the adaptive plugging member includes a support gasket 344 fixed to the internal channel of the spray head 343 and a plugging slider 345 sliding on the support gasket 344. The support gasket 344 is provided with a number of through holes for the spraying solution to flow through.

[0037] During the process of the lower spray head 343 rotating to the upper position, initially, the plugging slider 345 located inside the lower spray head 343 is in a natural drooping state under the action of gravity and is separated from the internal channel of the lower spray head 343, causing the lower spray head 343 to be in an open state. During the process of the lower spray head 343 gradually flipping upward, due to the change in the orientation of the lower spray head 343, the plugging slider 345 inside it starts to slide and approach the support gasket 344 under its own gravity. After the lower spray head 343 rotates to the upper position, the plugging slider 345 contacts the channel of the spray head 343, thereby closing the channel of the spray head 343. At the same time, similarly, during the process of the initially upper spray head 343 rotating to the lower position, the plugging slider 345 gradually slides away from the support gasket 344 under its own gravity, thereby opening the spray head 343. In this way, the adaptive plugging member realizes the adaptive opening or closing operation of the spray head 343 according to its position, without the need to actively control the opening and closing of the spray head 343.

[0038] In the above solution, when treating VOC waste gas containing particulate matter, the particulate matter is likely to block the aperture of the spray head 343. Although a spray head 343 with a large aperture is selected for spraying at this time, it is still impossible to avoid the blockage of the spray holes by the particulate matter. Therefore, to solve this problem, the present invention further optimizes on the basis of the above solution, and the specific solution is as follows:

[0039] Please refer to Figures 4 to 5 The adaptive plugging member further includes a movable rod 346 fixed to one end of the plugging slider 345, and a pressing block 347 fixed below the end of the main pipe 341. A ball 348 that rolls into contact with the pressing block 347 is provided at the end of the movable rod 346. A return spring 349 is fixed between the plugging slider 345 and the support gasket 344. The return spring 349 is a compression spring, and its pre-tightening force seals the channel of the spray head 343 by the plugging slider 345 in the non-spraying state. A cleaning member 3410 connected to the plugging slider 345 is provided inside the spray head 343. The cleaning member 3410 includes cleaning rods corresponding to the spray holes of the spray head 343 one by one. The end of the cleaning rod is conical, and its outer diameter matches the inner diameter of the spray hole of the spray head 343. Its conical angle is generally 30 - 60°. Both the spray head 343 and the cleaning rod are made of corrosion-resistant materials, and the corrosion-resistant material can generally be ceramics.

[0040] When switching the upper large-aperture nozzle 343 to the lower position, by rotating the sleeve 342, the upper nozzle 343 gradually rotates downward. Since the main pipe 341 remains fixed, the movable rod 346 rotates together with the nozzle 343. When the ball 348 at the end of the movable rod 346 contacts the extrusion block 347, as the sleeve 342 continues to rotate, the extrusion block 347 gradually generates a downward extrusion force on the movable rod 346. Since the ball 348 and the extrusion block 347 are in rolling contact, the friction between them is small, so it will not cause a large resistance to the rotation of the sleeve 342. The plugging slider 345 and the cleaning rod move downward together with the movable rod 346, and the return spring 349 is synchronously compressed by the plugging slider 345, and the cleaning rod gradually extends out of the corresponding spray hole. When the nozzle 343 rotates to the lower position, the cleaning rod just extends out of the bottom of the nozzle 343. During the process of the cleaning rod extending, the particulate matter originally blocked at the spray hole position can be cleaned up. In this way, during the process of switching the nozzle 343 to the use state, the preliminary self-cleaning effect of the nozzle 343 is synchronously realized. After that, during the spraying process, the sleeve 342 can be driven by the rotation drive assembly 33 to rotate slightly forward and backward regularly, so that the cleaning rod can reciprocate and extend, and the spray hole can be continuously cleaned several times, thereby avoiding the blockage of the spray hole by particulate matter, and enabling the nozzle 343 to have a self-cleaning function; after the spraying is over, if the lower nozzle 343 is switched back to the upper position, by driving the sleeve 342 to rotate, the movable rod 346 gradually moves away from the extrusion block 347. Under the elastic force of the return spring 349, the movable rod 346 can gradually move closer to the support gasket 344. After the ball 348 at the end of the movable rod 346 is completely separated from the extrusion block 347, the movable rod 346 is completely reset, and the plugging slider 345 just re-plugs the nozzle 343, and the cleaning rod retracts into the nozzle 343; it can be seen that by further improving the adaptive plugging member, not only can the spray holes of the nozzle 343 be cleaned, but also the movement of the plugging slider 345 is controlled by the movable rod 346. Compared with the previous gravity-driven movement method, its action response speed is faster, and it will not be affected by the friction between the plugging slider 345 and the nozzle 343, resulting in the plugging slider 345 not moving to the preset position. And when plugging, due to the elastic support of the support spring on the plugging slider 345, it is not easily opened passively due to the internal pressure of the nozzle 343. Therefore, the plugging stability of the plugging slider 345 is also improved. Therefore, this adaptive plugging member not only has the function of synchronously and adaptively controlling the opening and closing of the nozzle 343, but also has the cleaning effect on the spray holes of the nozzle 343.

[0041] Please refer to Figure 3 and Figure 6, the rotation drive assembly 33 includes a drive motor 331, two corresponding tooth rings 332 fixed to the upper end of the sleeve 342, and a gear shaft transmission member. The drive end of the drive motor 331 is respectively in transmission connection with the two tooth rings 332 through the gear shaft transmission member. The gear shaft transmission member includes a rotating rod 333, two first gears 334, and two second gears 335. The rotating rod 333 is rotatably installed below the main pipe 341. The two first gears 334 are respectively fixed to the drive end of the drive motor 331 and the outer side of the rotating rod 333. The two second gears 335 are respectively fixed to both ends of the rotating rod 333 and are respectively meshed with the two tooth rings 332 correspondingly.

[0042] When swapping the positions of the upper and lower spray heads 343, the drive motor 331 rotates, causing the two first gears 334 to rotate together. The rotating rod 333 is driven synchronously, and then the two second gears 335 respectively drive the two tooth rings 332 to rotate, finally enabling the two sleeves 342 to rotate.

[0043] The embodiments of the present invention have been described above. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of the present invention.

Claims

1. A skid-mounted VOC waste gas treatment device, characterized in that, Comprising: An outer casing, an inner processing chamber, and a spraying mechanism; The inner processing chamber is arranged inside the outer casing, and a spraying chamber, a filtering and adsorbing chamber, and a degradation chamber are sequentially arranged therein. Both ends of the outer casing are respectively communicated with an intake pipe and an outlet pipe. The intake pipe is communicated with the spraying chamber, and the outlet pipe is communicated with the degradation chamber; The spraying mechanism includes a rotary driving assembly and a spray head arranged at the upper end of the spraying chamber; The spray head includes a main pipe and two sleeves rotatably arranged at both ends of the main pipe. Two spray nozzles with different apertures are symmetrically communicated with the outside of the sleeve up and down; An adaptive plugging member is arranged inside the spray nozzle for automatically plugging the spraying channel when the spray nozzle switches to a non-use position; The rotary driving assembly is connected to the two sleeves for driving the two sleeves to rotate synchronously at the end of the main pipe to switch the positions of the upper and lower spray nozzles.

2. The skid-mounted VOC waste gas treatment equipment according to claim 1, wherein, The adaptive plugging member includes a support gasket fixed inside the spray nozzle and a plugging slider sliding on the support gasket. A plurality of through holes for the spraying solution to flow through are arranged on the support gasket.

3. The skid-mounted VOC waste gas treatment equipment according to claim 2, characterized in that, The adaptive plugging member further includes a movable rod fixed at one end of the plugging slider and an extrusion block fixed below the end of the main pipe. A ball in rolling contact with the extrusion block is arranged at the end of the movable rod. A return spring is fixed between the plugging slider and the support gasket.

4. A skid-mounted VOC waste gas treatment device according to claim 3, characterized in that, A cleaning member connected to the plugging slider is arranged inside the spray nozzle. The cleaning member includes cleaning rods corresponding to the spray holes of the spray nozzle one by one.

5. A skid-mounted VOC waste gas treatment device according to claim 1, characterized in that, The rotary driving assembly includes a driving motor, two tooth rings fixedly arranged corresponding to the upper ends of the sleeves, and a gear shaft transmission member. The driving end of the driving motor is respectively in transmission connection with the two tooth rings through the gear shaft transmission member.

6. The skid-mounted VOC waste gas treatment equipment according to claim 5, wherein, The gear shaft transmission member includes a rotating rod, two first gears, and two second gears. The rotating rod is rotatably installed below the main pipe. The two first gears are respectively fixed to the driving end of the driving motor and the outside of the rotating rod. The two second gears are respectively fixed to both ends of the rotating rod and are respectively meshed with the two tooth rings correspondingly.

7. A skid-mounted VOC waste gas treatment device according to claim 4, characterized in that, The end of the cleaning rod is of a conical structure, and its outer diameter matches the inner diameter of the spray hole of the spray nozzle.

8. The skid-mounted VOC waste gas treatment equipment according to claim 1, characterized in that, The two spray nozzles are divided into a large-aperture spray nozzle and a small-aperture spray nozzle. The large-aperture spray nozzle is used for treating waste gas containing particulate matter, and the small-aperture spray nozzle is used for treating hydrophobic waste gas.

9. The skid-mounted VOC waste gas treatment equipment according to claim 1, characterized in that, A filtering and adsorbing layer is arranged inside the filtering and adsorbing chamber for adsorbing particulate matter in the waste gas.

10. The skid-mounted VOC waste gas treatment equipment according to claim 1, characterized in that, A degradation solution is arranged inside the degradation chamber for decomposing harmful substances in the waste gas.

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