A multi-stage VOCs waste gas circulation purification treatment system

Abstract

The present invention relates to the technical field of VOCs waste gas circulation purification treatment, specifically a VOCs waste gas circulation purification treatment system based on a multi-stage type, comprising a bottom shell, a filler is fixedly installed inside the bottom shell, an infusible cleaning unit is installed on the upper end of the inner wall of the bottom shell, a fusion unit is fixedly connected to the upper end of the bottom shell, a waste gas release unit is rotatably connected inside the fusion unit, a ventilation pipe is installed on the left side of the waste gas release unit, the ventilation pipe is connected to the inside of the waste gas release unit, and a circulation pipe is fixedly installed on the right side of the bottom shell. VOCs waste gas is introduced into the waste gas release unit, and when the external drive drives the aeration cylinder to rotate, the VOCs waste gas flows into the aqueous solution inside the water tank through the air vents and the ventilation switch unit and merges with it. At the same time, when the ventilation cylinder drives the ventilation switch unit to rotate, it beats the bubbles formed by the VOCs waste gas, so that the bubbles are decomposed, thereby achieving the effect of accelerating the fusion of the VOCs waste gas and the aqueous solution.

Description

Technical Field

[0001] The present invention relates to the technical field of VOCs waste gas circulation purification treatment, and specifically relates to a multi-stage VOCs waste gas circulation purification treatment system. Background Technique

[0002] VOCs waste gas is the main component of industrial waste gas and has a greater impact on the atmospheric environment and the human body. Due to its complex sources and components, the treatment process of VOCs waste gas is relatively complex, and it often needs to go through multiple purification treatments before being discharged.

[0003] Among them, when treating low-concentration and large-flow VOCs waste gas, the biological treatment method is generally adopted. The VOCs waste gas is dissolved in water and then absorbed by microorganisms in the water. During its own physiological metabolism process, the organic matter in the VOCs waste gas is decomposed and converted into simple inorganic substances such as CO2, H2O and other simple inorganic substances, so as to decompose and treat the VOCs waste gas harmlessly. However, when introducing the VOCs waste gas into the water, it is generally introduced into the pipe at the bottom of the water until the bottom, and then the VOCs waste gas is pressurized so that the VOCs waste gas gushes out from the bottom of the pipeline. Such a method not only requires anti-water ingress treatment at the pipeline outlet, but also the gushing gas basically gushes out from the same position. When the VOCs waste gas moves upward, the VOCs waste gas cannot be fully integrated with the water flow. There is some VOCs waste gas above the liquid, resulting in slow dissolution. At the same time, when pouring the mixed liquid into the microbial bin, some insoluble impurities in the liquid are likely to block the nozzle, affecting the microbial decomposition efficiency. Summary of the Invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage VOCs waste gas circulation purification treatment system includes a bottom shell, a filler is fixedly installed inside the bottom shell, a non-fusible matter cleaning unit is installed at the upper end of the inner wall of the bottom shell, a fusion unit is fixedly connected to the upper end of the bottom shell, a waste gas release unit is rotatably connected inside the fusion unit, a ventilation pipe is installed on the left side of the waste gas release unit, the ventilation pipe is communicated with the inside of the waste gas release unit, a circulation pipe is fixedly installed on the right side of the bottom shell, and one end of the circulation pipe away from the bottom shell is fixedly connected to the upper end of the fusion unit.

[0005] The non-fusible matter cleaning unit includes a protective housing, the outer wall of the protective housing is fixedly connected to the upper end of the inner wall of the bottom housing, a spray head is fixedly installed at the bottom of the protective housing, an impurity filtering unit is arranged in the middle of the protective housing, water passing channels are fixedly installed on the front and rear sides of the upper end of the impurity filtering unit, a valve is fixedly installed at the upper end of the water passing channel, the outside of the valve is fixedly connected to the inner wall of the protective housing, the upper end of the valve is communicated with the inside of the fusion unit, a fixing block is fixedly installed between the lower end of the valve and between the two water passing channels, three equally spaced card slots are opened at the lower end of the fixing block, a blocking unit is arranged between the fixing block and the impurity filtering unit, and the outside of the blocking unit is fixedly connected to the inner wall of the protective housing.

[0006] Further, the exhaust gas release unit includes a ventilation cylinder, both ends of the ventilation cylinder are rotatably connected to the inner wall of the fusion unit, the left side of the ventilation cylinder is rotatably connected to a ventilation pipe, an installation groove is opened inside the ventilation cylinder, there are six installation grooves and they are evenly distributed around the axis of the ventilation cylinder, air permeable holes communicating the inner wall of the ventilation cylinder with the installation groove are opened on the inner ring surface of the ventilation cylinder, and a ventilation switch unit is slidably connected inside the installation groove.

[0007] Further, the ventilation switch unit includes a moving block, the moving block is slidably installed inside the installation groove, a throttling plate is fixedly installed at one end of the moving block, the end of the throttling plate away from the moving block extends outside the installation groove, a guiding chute is opened at the other end of the moving block, the guiding chute is slidably connected to one end of a guiding bent rod installed on the inner wall of the installation groove, a resistance spring is sleeved on the guiding bent rod, the end of the moving block away from the throttling plate is connected to the resistance spring, a delay block is arranged on the side of the moving block away from the axis of the ventilation cylinder, the side of the delay block close to the moving block is an inclined surface, a chamfer is arranged on the side of the moving block close to the delay block, and the inclination of the chamfer is the same as the inclination of the inclined surface of the delay block. A compression spring is connected between the end of the delay block away from the moving block and the inner wall of the installation groove, and the end of the delay block close to the resistance spring is slidably connected to a support plate installed on the inner wall. A positioning block is fixedly installed on the inner wall of the installation groove and on the side of the moving block close to the resistance spring, a chamfer is arranged on the side of the positioning block close to the moving block, and an exhaust hole is opened inside.

[0008] Further, the blocking unit includes a sealing cover, the outer wall of the sealing cover is fixedly connected to the inner wall of the protective housing, a slider is slidably installed inside the sealing cover, blocking plates are fixedly installed on the front and rear sides of the slider, the end of the blocking plate away from the slider penetrates through the water passing channel, and a communication hole is opened at the upper end of the blocking plate. A first baffle and a second baffle are fixedly installed at the lower end of the slider, and the first baffle and the second baffle are symmetric about the vertical center line of the slider.

[0009] Furthermore, an accommodation groove is opened at the upper end of the slider, a return spring is fixedly connected to the bottom of the accommodation groove, a clamping block is fixedly connected to the upper end of the return spring, the cross-section of the clamping block is trapezoidal, the cross-section of the clamping groove at the lower end of the fixed block is also trapezoidal, and the clamping block fits with the clamping groove at the lower end of the fixed block.

[0010] Furthermore, the impurity filtering unit includes a filter cartridge, the left and right ends of which are fixedly connected to the inner wall of the protective shell, a filter net is fixedly installed at the lower end of the protective shell, an impurity collecting unit is arranged at the axis of the filter cartridge, a scraper is arranged at the lower end of the impurity collecting unit, an elastic plate is arranged at the bottom of the scraper, a pressure plate is arranged at the upper end of the impurity collecting unit, and the upper end of the pressure plate is located between the first baffle and the second baffle, two connecting rods are fixedly installed at the left end of the impurity collecting unit, a roller is rotatably installed at one end of the connecting rod away from the impurity collecting unit, the two connecting rods form an inverted V structure, a clearing needle is installed on the surface of the roller, and the clearing needle can be inserted into the filter net.

[0011] Furthermore, the impurity collection unit includes a rotating drum, the left and right ends of the rotating drum are rotatably connected to the inner wall of the protective shell, the lower side of the rotating drum is fixedly connected to the upper end of the scraper, the upper end of the rotating drum is fixedly connected to the lower end of the pressure plate, the lower side of the rotating drum is provided with drop-out openings symmetrically about the scraper, a cleaning plate is fixedly installed inside the rotating drum and between the two drop-out openings, a fixed drum is fixedly installed at the axis of the rotating drum, the left and right ends of the fixed drum are fixedly connected to the inner wall of the protective shell, and a leakage opening is opened at the upper end of the fixed drum.

[0012] Furthermore, a screw conveyor is coaxially arranged in the fixed cylinder, and the left and right ends of the screw conveyor are fixedly connected to the inner wall of the protective shell, and the right end of the screw conveyor is connected to the outside.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention allows VOCs waste gas to pass into the waste gas release unit. When the external drive drives the ventilation cylinder to rotate, the VOCs waste gas flows into the aqueous solution inside the water tank through the air holes and the ventilation switch unit and merges with it. At the same time, when the ventilation cylinder drives the ventilation switch unit to rotate, it beats the bubbles formed by the VOCs waste gas to decompose the bubbles, thereby achieving the effect of accelerating the fusion of the VOCs waste gas and the aqueous solution.

[0015] 2. The present invention pours the mixed aqueous solution into the protective shell, and flows into the roller through the water passage. Impurities in the mixed solution are filtered and cleaned in the roller, and the filter screen is continuously cleaned to avoid clogging of the filter screen and affecting the filtering efficiency, thereby achieving the effect of cleaning and collecting impurities in the mixed solution and preventing infusible substances from being deposited at the bottom of the bottom shell and affecting the filler's absorption of organic matter in the water. Brief Description of the Drawings

[0016] Figure 1 This is a three-dimensional view of the overall structure of the present invention.

[0017] Figure 2 This is a front sectional view of the overall structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the exhaust gas release unit of the present invention.

[0019] Figure 4 This is the present invention in Figure 3 a partially enlarged view of the structure of area A.

[0020] Figure 5 This is a partial schematic diagram of the structure of the non-fusible material cleaning unit of the present invention.

[0021] Figure 6 This is the present invention in Figure 5 a partially enlarged view of the structure of area D.

[0022] Figure 7 This is a working state diagram of the impurity filtering unit of the present invention.

[0023] Figure 8 This is the present invention in Figure 5 a partially enlarged view of the structure of area B.

[0024] Figure 9 This is a partial left view of the structure of the non-fusible material cleaning unit of the present invention.

[0025] Figure 10 This is the present invention in Figure 5 a partially enlarged view of the structure of area C.

[0026] In the figure: 1. Bottom housing; 2. Filler; 3. Non-fusible material cleaning unit; 31. Protection housing; 32. Sprayer; 33. Impurity filtering unit; 331. Filter cylinder; 332. Impurity collection unit; 3321. Rotary cylinder; 3322. Material dropping opening; 3323. Cleaning plate; 3324. Fixed cylinder; 3325. Screw conveyor; 333. Scraper; 334. Pressure plate; 335. Connecting rod; 336. Roller; 34. Water passage; 35. Valve; 36. Fixed block; 37. Blocking unit; 371. Sealing cover; 372. Slide block; 373. Blocking plate; 374. Communication hole; 375. First baffle; 376. Second baffle; 377. Return spring; 378. Clamping block; 4. Fusion unit; 5. Exhaust gas release unit; 51. Ventilation cylinder; 52. Installation groove; 53. Ventilation hole; 54. Ventilation switch unit; 541. Moving block; 542. Shut-off plate; 543. Resistance spring; 544. Delay block; 545. Positioning block; 546. Exhaust hole; 6. Ventilation pipe; 7. Circulation pipe. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 and Figure 2 A multi-stage VOCs waste gas circulation purification treatment system includes a bottom shell 1. A filler 2 is fixedly installed inside the bottom shell 1. An incombustible cleaning unit 3 is installed at the upper end of the inner wall of the bottom shell 1. The upper end of the bottom shell 1 is fixedly connected to a fusion unit 4. A waste gas release unit 5 is rotatably connected inside the fusion unit 4. A ventilation pipe 6 is installed on the left side of the waste gas release unit 5. The ventilation pipe 6 is communicated with the inside of the waste gas release unit 5. A circulation pipe 7 is fixedly installed on the right side of the bottom shell 1. One end of the circulation pipe 7 away from the bottom shell 1 is fixedly connected to the upper end of the fusion unit 4.

[0029] When the work starts, the VOCs waste gas to be decomposed is introduced into the ventilation pipe 6. At this time, the waste gas release unit 5 is driven to rotate by an external drive source, so that a negative pressure is generated inside the waste gas release unit 5. Because the waste gas release unit 5 is communicated with the ventilation pipe 6, the waste gas release unit 5 absorbs the VOCs waste gas in the ventilation pipe 6. Then the waste gas release unit 5 discharges the VOCs waste gas into the fusion unit 4 to be fused with the aqueous solution. At the same time, because the waste gas release unit 5 is in a rotating state, it can fully stir the aqueous solution in the fusion unit 4 to accelerate the fusion of the VOCs waste gas and the aqueous solution. After the aqueous solution is fused with the VOCs waste gas, it enters the incombustible cleaning unit 3 when the switch in the incombustible cleaning unit 3 is opened. After being filtered by the incombustible cleaning unit 3, the aqueous solution flows into the bottom shell 1, that is, above the filler 2. Then the filler 2 absorbs and decomposes the organic matter fused with the aqueous solution. After being absorbed and decomposed by the filler 2, the clean aqueous solution is transported into the fusion unit 4 again through the circulation pipe 7 for the fusion of the VOCs waste gas, realizing the purpose of the whole VOCs waste gas circulation purification.

[0030] Please refer to Figure 2 and Figure 3, the exhaust gas release unit 5 includes a ventilation cylinder 51. Both ends of the ventilation cylinder 51 are rotatably connected to the inner wall of the fusion unit 4. The left side of the ventilation cylinder 51 is rotatably connected to the ventilation pipe 6. An installation groove 52 is formed inside the ventilation cylinder 51. There are six installation grooves 52 and they are evenly distributed around the axis of the ventilation cylinder 51. The inner ring surface of the ventilation cylinder 5 has air permeation holes 53 that connect the inner wall of the ventilation cylinder 51 and the installation groove 52. A ventilation switch unit 54 is slidably connected inside the installation groove 52.

[0031] Please refer to Figure 3 and Figure 4 , the ventilation switch unit 54 includes a moving block 541. The moving block 541 is slidably installed inside the installation groove 52. One end of the moving block 541 is fixedly installed with a throttling plate 542. The end of the throttling plate 542 away from the moving block 541 extends outside the installation groove 52. A guiding chute is formed at the other end of the moving block 541. The guiding chute is slidably connected to one end of a guiding bent rod installed on the inner wall of the installation groove 52. A resistance spring 543 is sleeved on the guiding bent rod. The end of the moving block 541 away from the throttling plate 542 is connected to the resistance spring 543. A delay block 544 is arranged on the side of the moving block 541 away from the axis of the ventilation cylinder 51. The side of the delay block 544 close to the moving block 541 is an inclined surface. A chamfer is arranged on the side of the moving block 541 close to the delay block 544. The inclination of the chamfer is the same as that of the inclined surface of the delay block 544. A compression spring is connected between the end of the delay block 544 away from the moving block 541 and the inner wall of the installation groove 52. And the end of the delay block 544 close to the resistance spring 543 is slidably connected to a support plate installed on the inner wall of 52. A positioning block 545 is fixedly installed on the inner wall of the installation groove 52 and on the side of the moving block 541 close to the resistance spring 543. A chamfer is arranged on the side of the positioning block 545 close to the moving block 541. An exhaust hole 546 is formed inside 541.

[0032] Driven by an external drive source, the exhaust gas release unit 5 rotates around its own axis. At this time, the throttle plate (542) on the exhaust gas release unit 5 interacts with the aqueous solution inside the fusion unit 4 to mix and stir the aqueous solution. At the same time, there is a reaction force on the throttle plate 542, causing the throttle plate 542 to move relative to the ventilation cylinder 51 in the direction opposite to the rotation of the ventilation cylinder 51, and driving the moving block 541 to exert pressure on the resistance spring 543. At the same time, when the moving block 541 moves, there is an extrusion force on the delay block 544. Since the force of the water flow on the throttle plate 542 is proportional to the rotation speed of the ventilation cylinder 51, when the rotation speed of the ventilation cylinder 51 gradually increases, the driving force of the moving block 541 on the delay block 544 also increases. Finally, the moving block 541 pushes the delay block 544 to move away from the moving block 541. At the same time, the compression spring is compressed and accumulates energy. At this time, the moving block 541 pushes away the delay block 544 and the throttle plate 542 together and moves in the direction of the resistance spring 543. Furthermore, the exhaust opening 546 opened inside the moving block 541 is connected to the ventilation hole 53 after moving. At the same time, when the rotation speed of the ventilation cylinder 51 increases, when the throttle plate 542 moves in the water flow, there is a gap on the side of the throttle plate 542 with a rotation speed opposite to that of the moving block 541 for a short time. This is caused by the throttle plate 542 quickly moving to push away the aqueous solution, so the pressure at the gap is relatively low. Since the exhaust opening 546 is close to the throttle plate 542, the VOCs exhaust gas located inside the ventilation cylinder 51 moves to the low-pressure area through the connected ventilation hole 53 and the exhaust opening 546, and then enters the aqueous solution to form bubbles, and thus gradually merges with the aqueous solution. Since the ventilation cylinder 51 is horizontally arranged at the bottom of the fusion unit 4, the VOCs exhaust gas surges into the aqueous solution and is widely distributed, and the fusion efficiency is fast. At the same time, due to the rapid rotation of the ventilation cylinder 51, the large bubbles formed by the VOCs exhaust gas in the aqueous solution are broken up into small bubbles by the throttle plate 542, further accelerating the fusion of the VOCs exhaust gas and the aqueous solution.

[0033] Please refer to Figure 2 and 5 As shown in FIGS. 3 and 4, the non-fusible material cleaning unit 3 includes a protective housing 31. The outer wall of the protective housing 31 is fixedly connected to the upper end of the inner wall of the bottom housing 1. A spray head 32 is fixedly installed at the bottom of the protective housing 31. An impurity filtering unit 33 is arranged in the middle of the protective housing 31. Water passing channels 34 are fixedly installed on the front and rear sides of the upper end of the impurity filtering unit 33. A valve 35 is fixedly installed at the upper end of the water passing channels 34. The outside of the valve 35 is fixedly connected to the inner wall of the protective housing 31. The upper end of the valve 35 is communicated with the inside of the fusion unit 4. A fixing block 36 is fixedly installed between the lower end of the valve 35 and the two water passing channels 34. Three equally spaced card slots are opened at the lower end of the fixing block 36. A blocking unit 37 is arranged between the fixing block 36 and the impurity filtering unit 33. The outside of the blocking unit 37 is fixedly connected to the inner wall of the protective housing 31.

[0034] Open the valve 35 to allow the aqueous solution that fuses VOCs waste gas in the fusion unit 4 to flow into the bottom housing 1. First, it enters the inside of the protective housing 31, and then flows into the inside of the impurity filtration unit 33 through the water passage 34. The mixed solution that flows into the inside of the impurity filtration unit 33 flows into the lower end inside the protective housing 31 after being filtered by the impurity filtration unit 33. The impurities present in the solution remain inside the impurity filtration unit 33. The filtered aqueous solution flows downward through the nozzle 32 and then enters the solution where the packing 2 is located.

[0035] Please refer to Figure 5 and Figure 8 As shown in, the blocking unit 37 includes a sealing cover 371. The outer wall of the sealing cover 371 is fixedly connected to the inner wall of the protective housing 31. A slider 372 is slidably installed inside the sealing cover 371. Blocking plates 373 are fixedly installed on both the front and rear sides of the slider 372. One end of the blocking plate 373 away from the slider 372 penetrates through the water passage 34, and a communication hole 374 is opened at the upper end of the blocking plate 373. A first baffle 375 and a second baffle 376 are fixedly installed at the lower end of the slider 372. The first baffle 375 and the second baffle 376 are symmetric about the vertical center line of the slider 372.

[0036] Please refer to Figure 8 As shown in, an installation groove is opened at the upper end of the slider 372. A return spring 377 is fixedly connected to the bottom of the installation groove. The upper end of the return spring 377 is fixedly connected to a clamping block 378. The cross-section of the clamping block 378 is trapezoidal, and the cross-section of the card slot at the lower end of the fixed block 36 is also trapezoidal. The clamping block 378 fits with the card slot at the lower end of the fixed block 36.

[0037] Please refer to Figure 5 、 Figure 6 and Figure 9 As shown in, the impurity filtration unit 33 includes a filter cylinder 331. The left and right ends of the filter cylinder 331 are fixedly connected to the inner wall of the protective housing 31. A filter net is fixedly installed at the lower end of the protective housing 31. An impurity collection unit 332 is arranged at the axis of the filter cylinder 331. A scraper 333 is arranged at the lower end of the impurity collection unit 332. An elastic plate is arranged at the bottom of the scraper 333. A pressure plate 334 is arranged at the upper end of the impurity collection unit 332. The upper end of the pressure plate 334 is located between the first baffle 375 and the second baffle 376. Two connecting rods 335 are fixedly installed at the left end of the impurity collection unit 332. A roller 336 is rotatably installed at one end of the connecting rod 335 away from the impurity collection unit 332. The two connecting rods 335 form an inverted V structure. A dredging needle is installed on the surface of the roller 336, and the dredging needle can be inserted into the filter net.

[0038] Please refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 10, the impurity collection unit 332 includes a rotary drum 3321. The left and right ends of the rotary drum 3321 are rotatably connected to the inner wall of the protective housing 31. The lower side of the rotary drum 3321 is fixedly connected to the upper end of a scraper 333. The upper end of the rotary drum 3321 is fixedly connected to the lower end of a pressure plate 334. The lower side of the rotary drum 3321 and symmetrically arranged before and after the scraper 333 are provided with material dropping openings 3322. Inside the rotary drum 3321 and between the two material dropping openings 3322, a cleaning plate 3323 is fixedly installed. At the axis of the rotary drum 3321, a fixed cylinder 3324 is fixedly installed. The left and right ends of the fixed cylinder 3324 are fixedly connected to the inner wall of the protective housing 31. The upper end of the fixed cylinder 3324 is provided with a leakage opening. Inside the fixed cylinder 3324, a screw conveyor 3325 is coaxially arranged. The left and right ends of the screw conveyor 3325 are fixedly connected to the inner wall of the protective housing 31 and the right end of the screw conveyor 3325 communicates with the outside.

[0039] While the mixed solution flows into the impurity filtering unit 33 through the water passing channel 34, an external driving source drives the rotary drum 3321 in the impurity collection unit 332 to swing back and forth cyclically like a pendulum clock. When the rotary drum 3321 swings forward, it drives the connecting rod 335 and the roller 336 to swing together, so that the roller 336 contacts the filter net and rotates simultaneously to dredge the outside of the filter net at the lower end of the filter cylinder 331. When the scraper 333 rotates with the rotary drum 3321, the elastic plate at the bottom of the scraper 333 cleans the inner ring surface of the filter net, achieving the purpose of cleaning both the inside and outside of the filter net, preventing the filter net from being blocked and affecting the filtering efficiency of the mixed solution. At the same time, the scraper 333 drives all the impurities on the filter net to move upward to the upper right of the filter cylinder 331 for centralized cleaning, and at the same time drives the pressure plate 334 to rotate together, so that the pressure plate 334 generates a thrust on the first baffle 375, thereby driving the slider 372 and the blocking plate 373 to move horizontally back and forth, so that the blocking plate 373 drives the communication hole 374 to leave the position of the water passing channel 34, blocking the water passing channel 34 in front of the impurity filtering unit 33, so as to prevent the solution from scouring the impurities when the rotary drum 3321 moves counterclockwise to clean the filter net and increasing the cleaning difficulty. When the blocking plate 373 moves, the clamping block 378 and the return spring 377 move in the clamping groove, thereby realizing the clamping and limiting of the slider 372, avoiding the spontaneous movement of the first baffle 375 when the pressure plate 334 finishes pushing the first baffle 375, as Figure 7 As shown, when the scraper 333 drives the impurities on the filter net to move upward to the front upper side of the filter cylinder 331 at the lower end of the scraper, that is, when the scraper rotates around the axis of the rotary drum 3321 by more than 90 degrees, the impurities will move towards the material dropping opening 3322 under the action of gravity, enter the fixed cylinder 3324 and fall into the screw conveyor 3325. At this time, the screw conveyor 3324 conveys the impurities to the outside, finally achieving the effects of filtering the solution, cleaning and collecting the impurities.

[0040] In the description of the present invention, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "coupled", "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description of the specification and the drawings.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A multi-stage VOCs waste gas circulation purification treatment system, including a bottom shell (1), Characterized in that: A filler (2) is fixedly installed inside the bottom shell (1), an incombustible cleaning unit (3) is installed at the upper end of the inner wall of the bottom shell (1), a fusion unit (4) is fixedly connected to the upper end of the bottom shell (1), a waste gas release unit (5) is rotatably connected inside the fusion unit (4), a ventilation pipe (6) is installed on the left side of the waste gas release unit (5), the ventilation pipe (6) is communicated with the inside of the waste gas release unit (5), a circulation pipe (7) is fixedly installed on the right side of the bottom shell (1), and one end of the circulation pipe (7) away from the bottom shell (1) is fixedly connected to the upper end of the fusion unit (4); The incombustible cleaning unit (3) includes a protective shell (31), the outer wall of the protective shell (31) is fixedly connected to the upper end of the inner wall of the bottom shell (1), a spray head (32) is fixedly installed at the bottom of the protective shell (31), an impurity filtering unit (33) is arranged in the middle of the protective shell (31), water passing channels (34) are fixedly installed on the front and rear sides of the upper end of the impurity filtering unit (33), a valve (35) is fixedly installed at the upper end of the water passing channels (34), the outside of the valve (35) is fixedly connected to the inner wall of the protective shell (31), the upper end of the valve (35) is communicated with the inside of the fusion unit (4), a fixing block (36) is fixedly installed between the lower end of the valve (35) and between the two water passing channels (34), three equally spaced slots are opened at the lower end of the fixing block (36), and a blocking unit (37) is arranged between the fixing block (36) and the impurity filtering unit (33), and the outside of the blocking unit (37) is fixedly connected to the inner wall of the protective shell (31); The blocking unit (37) includes a sealing cover (371), the outer wall of the sealing cover (371) is fixedly connected to the inner wall of the protective shell (31), a slider (372) is slidably installed inside the sealing cover (371), blocking plates (373) are fixedly installed on the front and rear sides of the slider (372), one end of the blocking plate (373) away from the slider (372) penetrates through the water passing channel (34), and a communication hole (374) is opened at the upper end of the blocking plate (373), a first baffle (375) and a second baffle (376) are fixedly installed at the lower end of the slider (372), and the first baffle (375) and the second baffle (376) are symmetric about the vertical center line of the slider (372); An installation groove is opened at the upper end of the slider (372), a return spring (377) is fixedly connected to the bottom of the installation groove, a clamping block (378) is fixedly connected to the upper end of the return spring (377), the cross section of the clamping block (378) is trapezoidal, the cross section of the slot at the lower end of the fixing block (36) is also trapezoidal, and the clamping block (378) is fitted with the slot at the lower end of the fixing block (36); The impurity filtering unit (33) includes a filtering cylinder (331). The left and right ends of the filtering cylinder (331) are fixedly connected to the inner wall of the protection housing (31). A filter screen is fixedly installed at the lower end of the protection housing (31). An impurity collection unit (332) is arranged at the axis of the filtering cylinder (331). A scraper (333) is arranged at the lower end of the impurity collection unit (332). An elastic plate is arranged at the bottom of the scraper (333). A pressure plate (334) is arranged at the upper end of the impurity collection unit (332). The upper end of the pressure plate (334) is located between the first baffle (375) and the second baffle (376). Two connecting rods (335) are fixedly installed at the left end of the impurity collection unit (332). A roller (336) is rotatably installed at the end of the connecting rod (335) away from the impurity collection unit (332). The two connecting rods (335) form an inverted V structure. A dredging needle is installed on the surface of the roller (336), and the dredging needle can be inserted into the filter screen.

2. A multi-stage VOCs waste gas circulation purification treatment system according to claim 1, wherein: The waste gas release unit (5) includes a ventilation cylinder (51). The two ends of the ventilation cylinder (51) are rotatably connected to the inner wall of the fusion unit (4). The left side of the ventilation cylinder (51) is rotatably connected to a ventilation pipeline (6). An installation groove (52) is formed inside the ventilation cylinder (51). There are six installation grooves (52) and they are evenly distributed around the axis of the ventilation cylinder (51). Air permeation holes (53) communicating the inner wall of the ventilation cylinder (51) with the installation groove (52) are formed on the inner ring surface of the ventilation cylinder (51). A ventilation switch unit (54) is slidably connected inside the installation groove (52).

3. A multi-stage VOCs waste gas circulation purification treatment system according to claim 2, wherein: The ventilation switch unit (54) includes a moving block (541) which is slidably installed inside the installation groove (52). One end of the moving block (541) is fixedly installed with a shut-off plate (542), and the end of the shut-off plate (542) away from the moving block (541) extends outside the installation groove (52). A guiding chute is formed at the other end of the moving block (541), and the guiding chute is slidably connected to one end of a guiding bent rod installed on the inner wall of the installation groove (52). A resistance spring (543) is sleeved on the guiding bent rod. The end of the moving block (541) away from the throttle plate (542) is connected to the resistance spring (543). A delay block (544) is arranged on the side of the moving block (541) away from the axis of the ventilation cylinder (51). The side of the delay block (544) close to the moving block (541) is an inclined surface. A chamfer is arranged on the side of the moving block (541) close to the delay block (544), and the inclination of the chamfer is the same as that of the inclined surface of the delay block (544). A compression spring is connected between the end of the delay block (544) away from the moving block (541) and the inner wall of the installation groove (52), and the end of the delay block (544) close to the resistance spring (543) is slidably connected to a support plate installed on the inner wall of the installation groove (52). A positioning block (545) is fixedly installed on the inner wall of the installation groove (52) and on the side of the moving block (541) close to the resistance spring (543). A chamfer is arranged on the side of the positioning block (545) close to the moving block (541). An exhaust hole (546) is formed inside the moving block (541).

4. A multi-stage VOCs waste gas circulation purification treatment system according to claim 1, characterized in that: The impurity collection unit (332) includes a rotating cylinder (3321). The left and right ends of the rotating cylinder (3321) are rotatably connected to the inner wall of the protection shell (31). The lower side of the rotating cylinder (3321) is fixedly connected to the upper end of a scraper (333). The upper end of the rotating cylinder (3321) is fixedly connected to the lower end of a pressure plate (334). Material dropping ports (3322) are formed on the lower side of the rotating cylinder (3321) and are symmetric about the front and back of the scraper (333). A cleaning plate (3323) is fixedly installed inside the rotating cylinder (3321) and between the two material dropping ports (3322). A fixed cylinder (3324) is fixedly installed at the axis of the rotating cylinder (3321). The left and right ends of the fixed cylinder (3324) are fixedly connected to the inner wall of the protection shell (31). A leakage port is formed at the upper end of the fixed cylinder (3324).

5. A multi-stage VOCs waste gas circulation purification treatment system according to claim 4, characterized in that: A screw conveyor (3325) is coaxially arranged inside the fixed cylinder (3324). The left and right ends of the screw conveyor (3325) are fixedly connected to the inner wall of the protection shell (31), and the right end of the screw conveyor (3325) is communicated with the outside.

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