A VOCs waste gas treatment system

Abstract

The present application relates to a VOCs waste gas treatment system, and relates to the technical field of sewage treatment, which includes a waste gas combustion device, a negative pressure source, and a sealing cover for covering a biochemical pool containing sewage; the sealing cover is connected to an air inlet pipe, and the end of the air inlet pipe away from the sealing cover is connected to the air inlet end of the negative pressure source, and the air outlet end of the negative pressure source is connected to the air inlet end of the waste gas combustion device; the outer wall of the sealing cover is penetrated with air holes for external gas to flow into the sealing cover; the waste gas combustion device is used to burn VOCs. The negative pressure source can input the waste gas containing VOCs in the sealing cover into the waste gas combustion device, so that the waste gas combustion device can burn VOCs, thereby reducing the possibility of VOCs polluting the air environment.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a VOCs waste gas treatment system. Background Art

[0002] Industrial wastewater or domestic sewage needs to be treated before being discharged to reduce the content of harmful substances in the sewage, thereby reducing the harm of sewage to the environment.

[0003] The general method of sewage treatment is to first discharge the sewage into a biochemical pool, and then add additives such as microorganisms and chemicals into the biochemical pool so that the additives react with the relevant harmful substances in the sewage, thereby converting the relevant harmful substances in the sewage into sediment, namely sludge, so that the harmful substances can be separated from the water, and finally the water that meets the standards can be discharged.

[0004] During the implementation of the above-mentioned related technologies, the sewage in the biochemical pool will produce volatile organic compounds, namely VOCs; if VOCs are discharged into the air, they will pollute the air environment, so there is room for improvement. Summary of the invention

[0005] The purpose of this application is to provide a VOCs waste gas treatment system to treat VOCs generated during sewage treatment, thereby reducing the possibility of VOCs polluting the air environment.

[0006] The VOCs waste gas treatment system provided in this application adopts the following technical solution:

[0007] A VOCs waste gas treatment system comprises a waste gas combustion device, a negative pressure source and a sealing cover for covering a biochemical pool containing sewage; the sealing cover is connected to an air inlet pipe, an end of the air inlet pipe away from the sealing cover is connected to the air inlet end of the negative pressure source, and the air outlet end of the negative pressure source is connected to the air inlet end of the waste gas combustion device; the outer side wall of the sealing cover is penetrated by an air vent for external gas to flow into the sealing cover; the waste gas combustion device is used to burn VOCs.

[0008] By adopting the above technical scheme, the sealing cover can collect VOCs generated by the sewage in the biochemical pool; the negative pressure source can form a negative pressure in the sealing cover, so that external gas can flow into the sealing cover through the air vents, so that the waste gas containing VOCs in the sealing cover can be input into the waste gas combustion device, so that the waste gas combustion device can burn the VOCs, thereby reducing the possibility of VOCs polluting the air environment.

[0009] Optionally, the inner wall of the air hole is connected to a ventilation tube, and one end of the air tube away from the air hole is connected to the inner wall of the sealing cover toward the air hole; a plurality of air holes are arranged through the air tube; and the air holes are located below the air inlet pipe.

[0010] By adopting the above technical solution, the ventilation holes are dispersedly arranged inside the sealing cover through the ventilation tubes; the external gas flows into the interior of the sealing cover through the ventilation holes through the ventilation tubes, and the gas flowing out of the ventilation holes can automatically flow upward to drive the VOCs to flow toward the air inlet pipe, thereby facilitating the VOCs in various places in the sealing cover to quickly flow into the air inlet pipe.

[0011] Optionally, the sealing cover is provided with a conical air collecting cover along the circumference of the air inlet pipe, and the conical air collecting cover is located inside the sealing cover; the end with a smaller opening of the conical air collecting cover is connected to the air inlet pipe, and the end with a larger opening is connected to the inner circumferential wall of the sealing cover.

[0012] By adopting the above technical solution, the conical gas collecting hood has a guiding effect on the flow of gas, so that the gas containing VOCs can flow quickly into the air inlet pipe, reducing the possibility of VOCs being retained in the sealing hood.

[0013] Optionally, it also includes a loading barrel for holding sludge generated by sewage treatment, the loading barrel is provided with a loading hole for throwing or cleaning the sludge, and the loading barrel is provided with a loading cover for sealing the loading hole; the loading barrel is provided with an input pipe and an output pipe communicated with the interior thereof; the exhaust end of the exhaust gas combustion device is connected to the input pipe, and the output pipe is connected to the intake end of the exhaust gas combustion device.

[0014] By adopting the above technical solution, the gas output from the gas outlet of the waste gas combustion device is high-temperature gas, which is input into the charging barrel through the input pipe to heat the sludge in the charging barrel, so that the water in the sludge can be evaporated quickly to reduce the water content of the sludge, thereby reducing the weight of the sludge, which is conducive to reducing the cost of outsourcing the sludge generated by sewage treatment. At the same time, VOCs generated in the sludge can be input into the waste gas combustion device through the output pipe to reduce the possibility of sludge treatment causing pollution to the environment.

[0015] Optionally, one end of the charging barrel is sleeved with an input cover, and the other end is sleeved with an output cover; the position of the charging barrel in the input cover is penetrated by an input hole, and the position of the charging barrel in the output cover is penetrated by an output hole; the input pipe is connected to the input cover, and the output pipe is connected to the output cover; the interior of the input pipe is communicated with the interior of the input cover, and the interior of the output pipe is communicated with the interior of the output cover; the charging barrel is rotatably connected to both the input cover and the output cover, and the charging barrel is connected to a rotating component for driving the rotation thereof.

[0016] By adopting the above technical solution, the gas in the input pipe flows into the input cover, and the gas in the input cover flows into the charging barrel through the input hole; the gas in the charging barrel flows from the output barrel to the output cover, and the gas in the output cover is output by the output pipe, so that the high-temperature gas output by the exhaust gas combustion device continues to flow into the charging barrel. The rotating assembly can drive the charging barrel to rotate, so that the sludge in the charging barrel rolls in the charging barrel, reducing the possibility of sludge compaction, which is conducive to increasing the contact area between the sludge and the high-temperature gas in the charging barrel, thereby facilitating the evaporation efficiency of the water in the sludge.

[0017] Optionally, two baffle ring plates are provided in the loading barrel, one of which is located between the input hole and the loading hole, and the other is located between the loading hole and the output hole; the outer peripheral wall of the baffle ring plate is sealed with the inner peripheral wall of the loading barrel, and the inner side of each baffle ring plate is inclined toward the direction of the other baffle ring plate along the length direction of the loading barrel.

[0018] By adopting the above technical solution, the gas flowing out of the input hole can flow from the inside of the corresponding baffle ring plate to the position between the two baffle ring plates; similarly, the gas between the two baffle ring plates can flow from the inside of the baffle ring plate near the output hole position to the output hole direction, so as to keep the gas in the charging barrel flowing. When the sludge contacts the side wall of one of the baffle ring plates facing the other baffle ring plate, the sludge can automatically slide downward along the side wall of the baffle ring plate and toward the other baffle ring plate, which is helpful to reduce the sludge from falling from the inside of the baffle ring plate to the side of the corresponding baffle ring plate away from the other baffle ring plate. The two baffle ring plates cooperate with each other to separate the sludge in the charging barrel from the input hole and the output hole, so as to reduce the possibility of sludge blocking the input hole or the output hole, so as to ensure the smooth flow of the input hole and the output hole.

[0019] Optionally, an extension ring plate is provided along the circumference of the inner circumferential wall of the baffle ring plate, and the inner side of the extension ring plate is inclined along the axial direction of the charging barrel in a direction away from the other baffle ring plate.

[0020] By adopting the above technical solution, the sludge falling into the baffle ring plate can slide downward along the side wall of the extended ring plate and toward the other baffle ring plate, thereby further reducing the possibility of the sludge falling to the side of the baffle ring plate away from the other baffle ring plate, thereby facilitating the cleaning of the sludge in the loading barrel.

[0021] Optionally, a stirring shaft is provided in the charging barrel, and a stirring rod for contacting the sludge is provided on the peripheral wall of the stirring shaft; both ends of the stirring shaft are rotatably connected to the charging barrel; and the stirring shaft is connected to a rotating component for driving itself to rotate.

[0022] By adopting the above technical solution, the rotating assembly can drive the stirring shaft to rotate so that the stirring rod can stir the sludge to loosen the sludge, thereby increasing the contact area between the sludge and the high-temperature gas in the charging barrel to accelerate the evaporation of water in the sludge. At the same time, the sludge that rises with the rotation of the charging barrel can contact the stirring shaft or the stirring rod when falling, which is conducive to further loosening the sludge.

[0023] Optionally, the rotating assembly includes a driving gear ring connected to the charging barrel, a transmission gear rotatably connected to the input cover or the output cover, and a driven gear connected to the stirring shaft; the driven gear and the transmission gear are both located inside the driving gear ring; the driven gear is meshed with the transmission gear, and the inner circumferential wall of the driving gear ring is provided with tooth grooves meshing with the gear teeth of the transmission gear.

[0024] By adopting the above technical solution, the charging barrel drives the active gear ring to rotate, thereby driving the transmission gear to rotate, and thus the stirring shaft rotates. The active gear ring, the transmission gear, and the driven gear cooperate with each other, so that the rotation direction of the stirring shaft is opposite to the rotation direction of the charging barrel, which is conducive to increasing the number of contacts between the stirring rod and the sludge, so as to improve the efficiency of the stirring rod in breaking up the sludge.

[0025] Optionally, the inner circumferential walls of the charging barrel on both sides of the charging hole are provided with guide blades, the guide blades are spirally arranged along the inner circumferential wall of the charging barrel, and the guide blades on both sides of the charging hole have opposite rotation directions.

[0026] By adopting the above technical solution, when the charging barrel rotates, the guide blades can make the sludge on both sides of the charging hole automatically move toward the charging hole, so that the sludge in the charging barrel can be discharged from the charging hole. By making the charging barrel rotate forward and reverse alternately, the sludge moves along the axial direction of the charging barrel, which is conducive to fully dispersing the sludge. On the other hand, when the charging barrel rotates, the guide blades can lift the sludge to reduce the possibility that the sludge slides relative to the charging barrel and causes the sludge to always be located at the lower side of the charging barrel; the sludge lifted by the guide blades can automatically fall, which is conducive to fully dispersing the sludge in the charging barrel.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The sealing cover can collect VOCs generated by the sewage in the biochemical pool; the negative pressure source can input the waste gas containing VOCs in the sealing cover into the waste gas combustion device, so that the waste gas combustion device can burn VOCs, thereby reducing the possibility of VOCs polluting the air environment;

[0029] 2. The gas output from the gas outlet of the exhaust gas combustion device is high-temperature gas, which is input into the charging barrel through the input pipe to heat the sludge in the charging barrel, so that the water in the sludge can be evaporated quickly to reduce the water content of the sludge, thereby reducing the weight of the sludge, which is conducive to reducing the cost of outsourcing the sludge generated by sewage treatment;

[0030] 3. The baffle ring plate and the extension ring plate cooperate with each other, which is conducive to ensuring the smooth flow of the input hole and the output hole, reducing the possibility of sludge falling to the side of the baffle ring plate away from the other baffle ring plate, thereby facilitating the cleaning of the sludge in the charging barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of a VOCs waste gas treatment system according to an embodiment of the present application.

[0032] Figure 2 is along Figure 1 Schematic diagram of the cross-section along line AA.

[0033] Figure 3 is along Figure 1 Schematic cross-sectional view along line BB.

[0034] Figure 4 yes Figure 3 Enlarged view of section C in .

[0035] In the figure, 1, sealing cover; 11, air outlet; 111, air inlet pipe; 1111, negative pressure source; 12, air vent; 121, air vent; 1211, air vent; 13, conical air collecting cover; 2, charging barrel; 21, input cover; 211, support seat; 212, input pipe; 22, output cover; 221, output pipe; 23, charging hole; 24, charging cover; 25, input hole; 26, output hole; 27, guide blade; 28, stirring Mixing shaft; 281, stirring rod; 29, material retaining ring plate; 291, extension ring plate; 3, regenerative thermal incinerator; 31, furnace body; 32, exhaust gas inlet pipe; 33, tail gas outlet pipe; 34, regulating pipe; 35, temperature control valve; 4, rotating assembly; 41, rotating motor; 411, bracket; 42, rotating gear; 43, mounting gear; 5, rotating assembly; 51, driving gear ring; 511, tooth groove; 52, transmission gear; 53, driven gear. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0037] A VOCs waste gas treatment system, referring to Figure 1, including an exhaust gas combustion device, a sealing cover 1 and a charging barrel 2. The sealing cover 1 is a shell with an opening at the lower end, which is used to cover the biochemical pool containing sewage. An air outlet 11 is opened downwardly through the upper surface of the sealing cover 1, and an air inlet pipe 111 is inserted into the air outlet 11, and the outer peripheral wall of the air inlet pipe 111 is welded and fixed to the inner peripheral wall of the air outlet 11. A negative pressure source 1111 is provided at one end of the air inlet pipe 111 away from the sealing cover 1, and the negative pressure source 1111 includes a negative pressure fan; the air inlet pipe 111 is connected to the air inlet end of the negative pressure source 1111 through a flange.

[0038] Reference Figure 1 and Figure 2 , the outer peripheral wall of the lower end of the sealing cover 1 is penetrated with a vent hole 12, and a plurality of vent holes 12 are sequentially opened along the circumference of the sealing cover 1; a vent pipe 121 is inserted into each vent hole 12, and the outer peripheral wall of the vent pipe 121 is welded and fixed to the inner peripheral wall of the vent hole 12; the end of the vent pipe 121 away from the corresponding vent hole 12 extends to the inside of the sealing cover 1 and is welded and fixed to the inner side wall of the sealing cover 1 facing the corresponding vent hole 12. The outer peripheral wall of the vent pipe 121 is penetrated with a plurality of vent holes 1211; after the negative pressure source 1111 is started, negative pressure is formed in the sealing cover 1, and the gas outside the sealing cover 1 can flow into the vent pipe 121 and flow out from the vent hole 1211, and the gas flowing out from the vent hole 1211 can drive the VOCs generated in the sewage to flow upward.

[0039] Reference Figure 2 The sealing cover 1 is provided with a conical gas collecting cover 13, which is a pyramid-shaped shell with a hollow interior and two ends penetrated; the end of the conical gas collecting cover 13 with a smaller opening is sleeved on the air inlet pipe 111 and welded to the air inlet pipe 111, and the outer peripheral wall of the end of the conical gas collecting cover 13 with a larger opening is sealed and welded to the inner peripheral wall of the sealing cover 1. The gas flowing upward in the sealing cover 1 can automatically flow along the inner peripheral wall of the conical gas collecting cover 13 toward the air inlet pipe 111, so that the VOCs in the sealing cover 1 can flow out quickly.

[0040] Reference Figure 1, the waste gas combustion device includes a regenerative thermal incinerator 3 (i.e., RTO); the regenerative thermal incinerator 3 includes a furnace body 31, a waste gas inlet pipe 32, a tail gas outlet pipe 33, a regulating pipe 34, and a temperature control valve 35. The furnace body 31 is used to burn waste gas; the structure of the furnace body 31 has been disclosed in the relevant technology and will not be described in detail in this embodiment. The waste gas inlet pipe 32, the tail gas outlet pipe 33, and the regulating pipe 34 are all fixedly connected to the furnace body 31 and are all connected to the combustion chamber of the furnace body 31; the temperature control valve 35 is connected to the regulating pipe 34. The gas outlet end of the negative pressure source 1111 is connected to the waste gas inlet pipe 32 through a pipeline to transport the VOCs in the sealing cover 1 to the furnace body 31, so that the VOCs can be burned; the carbon dioxide and water vapor generated after combustion are discharged from the tail gas outlet pipe 33. The electric control system of the furnace body 31 can automatically control the opening and closing of the temperature control valve 35 according to the temperature in the combustion chamber of the furnace body 31; when the temperature in the combustion chamber of the furnace body 31 is higher than a predetermined value, the temperature control valve 35 opens to allow the carbon dioxide and water vapor generated by the combustion in the combustion chamber of the furnace body 31 to be discharged through the regulating tube 34, thereby reducing the temperature in the combustion chamber of the furnace body 31.

[0041] Reference Figure 3 The charging barrel 2 is hollow inside and cylindrically sealed at both ends. The charging barrel 2 is provided with an input cover 21 and an output cover 22. Both the input cover 21 and the output cover 22 are cylindrical shells with one end open; the input cover 21 is sleeved on one end of the charging barrel 2, and the output cover 22 is sleeved on the other end of the charging barrel 2. A support seat 211 is welded and fixed at the lower ends of the input cover 21 and the output cover 22 to support the charging barrel 2. A charging hole 23 is opened through the outer peripheral wall of the charging barrel 2. The charging hole 23 is located between the input cover 21 and the output cover 22 to put the sludge generated by sewage treatment into the charging barrel 2. The charging barrel 2 is provided with a charging cover plate 24, which is fixed to the outer peripheral wall of the charging barrel 2 by screws to block the charging cover plate 24.

[0042] Reference Figure 1 and Figure 3, an input pipe 212 is welded and fixed to the end wall of the input cover 21 away from the output cover 22, and the interior of the input pipe 212 is communicated with the interior of the input cover 21; an output pipe 221 is welded and fixed to the end wall of the output cover 22 away from the input cover 21, and the interior of the output pipe 221 is communicated with the interior of the output cover 22. An input hole 25 is penetrated and opened in the end wall of the charging barrel 2 at one end of the input cover 21, and an output hole 26 is penetrated and opened in the end wall of the other end of the charging barrel 2; the regulating pipe 34 is connected to the input pipe 212 through a pipeline, so that the high-temperature gas output by the input pipe 212 flows into the charging barrel 2 through the input hole 25, so as to heat the sludge in the charging barrel 2, so as to provide rapid evaporation of the water in the sludge. The output pipe 221 is connected to the air inlet pipe 111 through a pipeline, so that the VOCs generated by the sludge flow into the furnace body 31. In another embodiment, the input pipe 212 and the output pipe 221 can also be directly connected to the end wall or the outer peripheral wall of the corresponding end of the charging barrel 2. In another embodiment, a three-way valve may be installed at the outlet end of the exhaust gas outlet pipe 33 , and one of the outlet ends of the three-way valve may be connected to the input pipe 212 .

[0043] Reference Figure 3 Two guide blades 27 are arranged in the charging barrel 2, one of which is located on one side of the charging hole 23 along the length direction of the charging barrel 2, and the other is located on the other side of the charging hole 23; both guide blades 27 are spiral along the circumference of the charging barrel 2, and both guide blades 27 are welded and fixed to the inner peripheral wall of the charging barrel 2. The input cover 21 and the output cover 22 are both rotatably connected to the outer peripheral wall of the charging barrel 2 through bearings; the charging barrel 2 is provided with a rotating assembly 4 for driving the charging barrel 2 to rotate, so that the guide blades 27 can drive the sludge to move to the top of the charging barrel 2; in the process of the sludge moving to the top of the charging barrel 2 with the guide blades 27, the sludge can automatically fall under the action of its own gravity, thereby increasing the contact area between the sludge and the gas in the charging barrel 2, so as to improve the evaporation efficiency of the water in the sludge. In this embodiment, the two guide blades 27 rotate in opposite directions, so that the sludge automatically moves toward the charging hole 23 as the charging barrel 2 rotates, thereby facilitating the discharge of the dried sludge.

[0044] Reference Figure 3, the rotating assembly 4 is located near the input cover 21; the rotating assembly 4 includes a rotating motor 41, a rotating gear 42 and a mounting gear 43, and the mounting gear 43 is sleeved on the outer peripheral wall of the charging barrel 2; the rotating motor 41 is fixedly installed on the outer peripheral wall of the input cover 21 through a bracket 411, the rotating gear 42 is keyed to the output shaft of the rotating motor 41, and the rotating gear 42 is meshed with the mounting gear 43 to drive the charging barrel 2 to rotate. A stirring shaft 28 is arranged in the charging barrel 2, and both ends of the stirring shaft 28 penetrate the end wall of the charging barrel 2 and are rotatably connected to the end wall of the charging barrel 2; a plurality of stirring rods 281 are welded and fixed to the peripheral wall of the stirring shaft 28, and all the stirring rods 281 are scattered on the peripheral wall of the stirring shaft 28. The stirring shaft 28 is connected to a rotating assembly 5, and the rotating assembly 5 is used to drive the stirring shaft 28 to rotate, so that the stirring rod 281 contacts the sludge in the charging barrel 2, thereby stirring the sludge to further accelerate the evaporation of water in the sludge. In this embodiment, the stirring shaft 28 is coaxial with the charging barrel 2.

[0045] Reference Figure 4 , the rotating assembly 5 is located near one end of the input cover 21, and the rotating assembly 5 is located inside the input cover 21. The rotating assembly 5 includes a driving gear ring 51, a transmission gear 52 and a driven gear 53, and the transmission gear 52 and the driven gear 53 are both located inside the driving gear ring 51. The driving gear ring 51 is coaxial with the stirring shaft 28, and the driving gear ring 51 is fixedly connected to the end wall of the corresponding end of the charging barrel 2 by screws; the driven gear 53 is key-connected with the stirring shaft 28, the transmission gear 52 is rotationally connected to the inner side wall of the input cover 21 through a rotating shaft, and the transmission gear 52 is meshed with the driven gear 53; the inner peripheral wall of the driving gear ring 51 is provided with tooth grooves 511, and the tooth grooves 511 are sequentially spaced along the circumference of the driving gear ring 51, and the tooth grooves 511 are meshed with the gear teeth of the transmission gear 52, so that the charging barrel 2 drives the transmission gear 52 to rotate, so that the driven gear 53 can drive the stirring shaft 28 to rotate.

[0046] Reference Figure 3 and Figure 4 Two baffle ring plates 29 are arranged in the charging barrel 2. The baffle ring plates 29 correspond to the guide blades 27 one by one. Each baffle ring plate 29 is located on the side of the corresponding guide blade 27 away from the other guide blade 27. The guide ring plate is coaxial with the charging barrel 2, and the outer peripheral wall of the guide ring plate is sealed and welded to the inner peripheral wall of the charging barrel 2, and the inner side of the guide ring plate is tilted toward the direction of the other baffle ring plate 29 along the length direction of the charging barrel 2. An extension ring plate 291 is welded and fixed to the inner peripheral wall of each baffle ring plate 29, and the inner side of the extension ring plate 291 is tilted away from the other baffle ring plate 29 along the length direction of the charging barrel 2, and a gap is arranged between the inner peripheral wall of the baffle ring plate 29 and the stirring shaft 28 to allow the gas in the charging barrel 2 to flow. The baffle ring plate 29 and the extension ring plate 291 cooperate with each other to reduce the possibility of the input hole 25 or the output hole 26 being blocked by sludge.

[0047] The implementation principle of the embodiment of the present application is:

[0048] During sewage treatment, the sealing cover 1 is placed on the biochemical pool containing sewage, and the sludge generated by the previous sewage treatment is loaded into the loading barrel 2; then the negative pressure source 1111 and the exhaust gas combustion device are started; the negative pressure source 1111 transports the gas containing VOCs in the sealing cover 1 to the exhaust gas combustion device for combustion treatment of the VOCs; the high-temperature gas generated by the combustion can be input into the input cover 21 and the loading barrel 2 in turn through the input pipe 212 to dry the sludge in the loading barrel 2, thereby reducing the water content of the sludge and reducing the cost of outsourcing the sludge treatment.

[0049] The VOCs generated by the sewage are collected through the sealing cover 1; at the same time, the negative pressure source 1111 inputs the VOCs into the waste gas combustion device for combustion treatment, which is beneficial to reduce the possibility of VOCs polluting the air environment.

[0050] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A VOCs waste gas treatment system, characterized in that: The invention comprises a waste gas combustion device, a negative pressure source (1111) and a sealing cover (1) for covering a biochemical pool containing sewage; the sealing cover (1) is connected to an air inlet pipe (111), an end of the air inlet pipe (111) away from the sealing cover (1) is connected to an air inlet end of the negative pressure source (1111), and an air outlet end of the negative pressure source (1111) is connected to an air inlet end of the waste gas combustion device; an air vent (12) is provided through the outer wall of the sealing cover (1) for external gas to flow into the sealing cover (1); the waste gas combustion device is used to burn VOCs; The inner wall of the air hole (12) is connected to a ventilation tube (121); one end of the ventilation tube (121) away from the air hole (12) is connected to the inner wall of the sealing cover (1) in the direction of the air hole (12); a plurality of ventilation holes (1211) are arranged through the ventilation tube (121); the ventilation holes (1211) are located below the air inlet pipe (111); The sealing cover (1) is provided with a conical air collecting cover (13) along the circumference of the air inlet pipe (111), and the conical air collecting cover (13) is located inside the sealing cover (1); the end with a smaller opening of the conical air collecting cover (13) is connected to the air inlet pipe (111), and the end with a larger opening is connected to the inner circumferential wall of the sealing cover (1); It also includes a loading barrel (2) for containing sludge generated by sewage treatment, the loading barrel (2) being provided with a loading hole (23) for dropping or cleaning sludge, and the loading barrel (2) being provided with a loading cover plate (24) for blocking the loading hole (23); the loading barrel (2) being provided with an input pipe (212) and an output pipe (221) communicating with the interior thereof; the gas outlet end of the waste gas combustion device is connected to the input pipe (212), and the output pipe (221) is connected to the gas inlet end of the waste gas combustion device; Two baffle ring plates (29) are arranged in the charging barrel (2), wherein one of the baffle ring plates (29) is located between the input hole (25) and the charging hole (23), and the other baffle ring plate (29) is located between the charging hole (23) and the output hole (26); the outer peripheral wall of the baffle ring plate (29) is sealedly connected to the inner peripheral wall of the charging barrel (2), and the inner side of each baffle ring plate (29) is inclined along the length direction of the charging barrel (2) toward the direction of the other baffle ring plate (29); An extended ring plate (291) is arranged on the inner peripheral wall of the baffle ring plate (29) along its circumference, and the inner side of the extended ring plate (291) is arranged inclined along the axial direction of the charging barrel (2) in a direction away from the other baffle ring plate (29).

2. The VOCs waste gas treatment system according to claim 1, characterized in that: One end of the charging barrel (2) is sleeved with an input cover (21), and the other end is sleeved with an output cover (22); an input hole (25) is provided through the position of the charging barrel (2) located inside the input cover (21), and an output hole (26) is provided through the position of the charging barrel (2) located inside the output cover (22); the input pipe (212) is connected to the input cover (21), and the output pipe (221) is connected to the output cover (22); the interior of the input pipe (212) is communicated with the interior of the input cover (21), and the interior of the output pipe (221) is communicated with the interior of the output cover (22); the charging barrel (2) is rotatably connected to both the input cover (21) and the output cover (22), and the charging barrel (2) is connected to a rotating assembly (4) for driving the charging barrel (2) to rotate.

3. The VOCs waste gas treatment system according to claim 2, characterized in that: A stirring shaft (28) is arranged in the charging barrel (2), and a stirring rod (281) for contacting the sludge is arranged on the peripheral wall of the stirring shaft (28); both ends of the stirring shaft (28) are rotatably connected to the charging barrel (2); and the stirring shaft (28) is connected to a rotating component (5) for driving itself to rotate.

4. The VOCs waste gas treatment system according to claim 3, characterized in that: The rotating assembly (5) comprises a driving gear ring (51) connected to the charging barrel (2), a transmission gear (52) rotatably connected to the input cover (21) or the output cover (22), and a driven gear (53) connected to the stirring shaft (28); the driven gear (53) and the transmission gear (52) are both located inside the driving gear ring (51); the driven gear (53) meshes with the transmission gear (52), and the inner peripheral wall of the driving gear ring (51) is provided with a tooth groove (511) meshing with the gear teeth of the transmission gear (52).

5. The VOCs waste gas treatment system according to claim 2, characterized in that: The inner circumferential walls of the charging barrel (2) on both sides of the charging hole (23) are provided with guide blades (27), the guide blades (27) are spirally arranged along the inner circumferential wall of the charging barrel (2), and the guide blades (27) on both sides of the charging hole (23) have opposite rotation directions.

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