An RTO tail gas multi-stage treatment device and its treatment method

Abstract

The present invention discloses an RTO tail gas multi-stage treatment device and a treatment method thereof, specifically relating to the technical field of tail gas treatment systems. The device includes a tank body and a steam cavity formed by enclosing between an outer pipe and an inner pipe arranged therein. The flow blocking unit arranged in the tank body includes: a bottom block, which is arranged at the bottom of the inner pipe, and is provided with a side hole at one end communicating with the steam cavity and the other end communicating with the inner side of the inner pipe; a bottom pipe, which is located on the bottom block and encloses with the bottom block to form a collecting groove. The RTO tail gas multi-stage treatment device and the treatment method provided by the invention heat the inner pipe by introducing high-temperature steam into the steam cavity. Then, when the RTO tail gas enters the inner pipe, the tar droplets accumulated on the inner wall of the inner pipe do not condense easily because the inner pipe is in a high-temperature state, so that the tar droplets can flow down smoothly and gather in the collecting groove for interception and collection, thereby reducing the problem that the tar droplets flow onto the bottom pipe close to the liquid in the tank body and condense and block.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment systems, and particularly relates to an RTO tail gas multi-stage treatment device and a treatment method thereof. Background Art

[0002] RTO is an effective tail gas treatment technology mainly used to remove volatile organic compounds (VOCs) and other pollutants. Its working principle is to oxidize organic pollutants into water and carbon dioxide through high-temperature combustion, and at the same time recover heat through the regeneration process to improve energy efficiency.

[0003] According to the patent publication number CN115779659A, publication date: March 14, 2023, there is disclosed an RTO tail gas treatment system, including a water seal tank. An air inlet pipe is provided at the upper end of the water seal tank, and an exhaust pipe is provided on one side wall of the water seal tank. A circulation buffer tank is provided on one side of the water seal tank, and the overflow end of the water seal tank is communicated with the circulation buffer tank through a pipeline. A liquid adding pipe for fresh water replenishment is provided on the circulation buffer tank, and the drainage end of the circulation buffer tank is communicated with the water replenishment end of the water seal tank through a pipeline.

[0004] In the prior art including the above patent, during the RTO tail gas treatment process, there is a step of passing the tail gas through a water seal tank for impurity removal. After the tail gas passes through the liquid bath in the water seal tank, some dust, impurity particles, tar, etc. in the tail gas will be absorbed by the liquid in the water seal tank. However, in a conventional water seal tank, when the gas guide pipe inserted into the liquid contacts the liquid, the heat of the gas guide pipe will be absorbed by the water body, resulting in the tar in the gas guide pipe cooling and adhering to the inner wall of the gas guide pipe together with the trace dust in the tail gas. Long-term accumulation will affect the flow of the tail gas. Summary of the Invention

[0005] The purpose of the present invention is to provide an RTO tail gas multi-stage treatment device and a treatment method thereof to solve the above technical problems.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An RTO tail gas multi-stage treatment device includes a tank body and a steam cavity formed by enclosing between an outer pipe and an inner pipe arranged therein. The flow resistance unit arranged in the tank body includes:

[0007] A bottom block, which is arranged at the bottom of the inner pipe, and a side hole is opened thereon, with one end communicating with the steam cavity and the other end communicating with the inner side of the inner pipe;

[0008] A bottom pipe, which is located on the bottom block and encloses with the bottom block to form a collection tank, and the collection tank is located on one side of the side hole and communicates with the inner pipe.

[0009] Preferably, it includes a plurality of liquid outlet channels opened on the bottom block and respectively communicating with the collection tank, and a plurality of outer spray pipes communicating with the steam cavity are arranged on the outer wall of the outer pipe.

[0010] Preferably, a right-angle sealing plate is hingedly arranged in each of a plurality of spray nozzles formed on the inner wall of the inner tube, and a main torsion spring arranged on the right-angle sealing plate closes the spray nozzle in a default state.

[0011] Preferably, it includes a pushing ring movably arranged in the steam cavity and movably assembled with a plurality of right-angle sealing plates respectively to open the spray nozzles, and a sealing ring fixedly connected to the pushing ring.

[0012] Preferably, it includes a conical cover and a pressing ring fixedly installed thereon, and the pressing ring is movably arranged in the collecting groove.

[0013] Preferably, it includes a main ring gasket and an auxiliary ring gasket on the inner walls of opposite sides of the collecting groove, and the pressing ring is movably arranged on the main ring gasket and the auxiliary ring gasket respectively and presses the main ring gasket to block the side holes.

[0014] Preferably, it includes a chamfered edge arranged on the bottom block. When the conical cover moves down to the lowest position, it fits on the chamfered edge, and the right-angle sealing plate flips to open the spray nozzle.

[0015] Preferably, a shielding plate is hingedly arranged in each of the window grooves arranged in a circular array on the conical cover, and the extrusion rods slidably arranged on the conical cover are respectively movable on the chamfered edge and push the shielding plate to flip.

[0016] Preferably, movable grooves are symmetrically formed on the inner wall of the inner tube, and a pressing plate fixedly connected to the pushing ring is located on the path of the downward movement of the conical cover.

[0017] A processing method of an RTO tail gas multi-stage treatment device, the following operation steps of the RTO tail gas multi-stage treatment device in the above scheme:

[0018] S1. The RTO tail gas enters the inner tube, and the high-temperature steam enters the steam cavity, so that the high-temperature steam heats the inner tube, and part of the high-temperature steam sprays out along the outer spray pipe to contact and mix with the filtered RTO tail gas again;

[0019] S2. The conical cover moves downwards so that the pressing ring enters the collecting groove and scrapes the main ring gasket and the auxiliary ring gasket, and the main ring gasket deforms to block the side holes;

[0020] S3. When the conical cover moves downwards, it approaches the chamfered edge, and the extrusion rods are respectively movable on the chamfered edge and push the shielding plate to flip;

[0021] S4. The pressing plate fixedly connected to the pushing ring is pushed downwards when the conical cover moves downwards, and the pushing ring moves downwards to simultaneously push a plurality of right-angle sealing plates to flip;

[0022] S5. When the conical cover moves upwards, the side holes are opened, and the conical cover disengages from the chamfered edge.

[0023] In the above technical solution, a multi-stage treatment device for RTO tail gas and its treatment method provided by the present invention have the following beneficial effects: By introducing high-temperature steam into the steam cavity to heat the inner tube, when the RTO tail gas enters the inner tube, the tar droplets accumulated on the inner wall of the inner tube are in a high-temperature state, thereby reducing the condensation of tar droplets, enabling the tar droplets to flow smoothly downward and gather in the collection tank for interception and collection, thus reducing the problem that the tar droplets flow to the bottom tube near the liquid in the tank body and condense and block. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the overall structure of the tank body provided by the embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the outer tube provided by the embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the structure of the vertical rod provided by the embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the conical cover provided by the embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the structure when the baffle is flipped provided by the embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the overall sectional structure of the tank body provided by the embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the partial sectional structure of the tank body provided by the embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the sectional structure of the outer tube provided by the embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the partial sectional structure of the outer tube provided by the embodiment of the present invention;

[0034] Figure 10 Provided by the embodiment of the present invention Figure 6 Enlarged structure schematic diagram at position A;

[0035] Figure 11 Provided by the embodiment of the present invention Figure 7 Enlarged structure schematic diagram at position B;

[0036] Figure 12 For the embodiment of the present invention Figure 8 Schematic diagram of the enlarged structure at position C in

[0037] Figure 13 For the embodiment of the present invention Figure 6 Schematic diagram of the enlarged structure at position D in

[0038] Explanation of reference numerals:

[0039] 1, tank body; 2, outer pipe; 3, vertical rod; 4, bottom block; 5, right-angle sealing plate; 6, conical cover; 7, shielding plate; 8, main electric push rod; 11, tail gas port; 12, air outlet pipe; 13, support box; 14, waste liquid pipe; 15, overflow port; 16, sewage collection box; 21, inner pipe; 22, gas transmission pipe; 23, steam cavity; 24, outer spray pipe; 25, sewage discharge pipe; 26, spray port; 27, movable groove; 28, nozzle; 31, extrusion ring; 32, pressing plate; 33, blocking plate; 34, sealing ring; 41, side hole; 42, chamfered edge; 43, main gasket; 44, liquid discharge hole; 45, liquid outlet channel; 46, collection tank; 47, bottom pipe; 48, auxiliary gasket; 49, thin-walled rubber tube; 51, main torsion spring; 61, window groove; 62, embedding groove; 63, curved cavity; 64, support pipe; 65, pressing ring; 66, air inlet; 67, single ventilation valve; 71, secondary torsion spring; 72, extrusion rod; 81, main shaft rod. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] As Figures 1-13 shown, an RTO tail gas multi-stage treatment device includes a tank body 1 and a steam cavity 23 formed by enclosing between an outer pipe 2 and an inner pipe 21 arranged therein. The flow resistance unit arranged in the tank body 1 includes:

[0042] A bottom block 4, which is arranged at the bottom of the inner pipe 21, and is provided with a side hole 41 at one end communicating with the steam cavity 23 and the other end communicating with the inner side of the inner pipe 21;

[0043] A bottom pipe 47, which is located on the bottom block 4 and encloses with the bottom block 4 to form a collection tank 46, and the collection tank 46 is located on one side of the side hole 41 and communicates with the inner pipe 21.

[0044] Specifically, the tops of the outer tube 2 and the inner tube 21 are respectively fixedly installed on the inner wall of the tank body 1, the bottom block 4 is fixedly installed at the bottoms of the outer tube 2 and the inner tube 21, an air delivery pipe 22 is fixedly installed on the outer tube 2, and the air delivery pipe 22 communicates with the steam chamber 23 and extends out of the outer wall of the tank body 1. A bottom pipe 47 is fixedly installed on the bottom block 4. The tail gas port 11 fixedly installed at the top of the tank body 1 communicates with the inside of the inner tube 21. The outer wall of the tank body 1 is fixedly communicated with a waste liquid pipe 14, an air outlet pipe 12 and an overflow port 15. The bottom end of the bottom pipe 47 is fixedly installed with a thin-walled rubber pipe 49. The bottom end of the thin-walled rubber pipe 49 is immersed in the liquid in the tank body 1, and the thin-walled rubber pipe 49 is used to prevent the bottom pipe 47 from directly contacting the liquid in the tank body 1, reducing the loss of heat absorbed by the bottom pipe 47 from the steam.

[0045] Further, the VOCs waste gas generated during the production process of coatings, cleaning agents or paints is fixedly communicated with the tail gas port 11 through a corresponding conveying pipeline, so that the waste gas is discharged into the tail gas port 11. Then the tail gas enters the inner tube 21. Since the high-temperature steam is conveyed along the air delivery pipe 22 into the steam chamber 23, the high-temperature steam is used to heat the inner tube 21, so that the tail gas flowing in the inner tube 21 is heated. When the tar in the tail gas accumulates on the inner wall of the inner tube 21, it is heated and flows downward. Since the condensation temperature range of tar is generally between 60°C and 90°C, and the temperature of the high-temperature steam is generally above 100°C, the temperature of the inner tube 21 is increased, thereby reducing the condensation of tar on the inner wall of the inner tube 21.

[0046] Furthermore, as the tar droplets accumulated on the inner wall of the inner tube 21 flow downward, the tar liquid flows into the collection tank 46. Then, through the collection of the tar liquid and the pre-interception treatment before immersion in water, the problem of pre-cooling and condensation of the tar liquid on the inner wall of the bottom pipe 47 is reduced, and the collection of the tar liquid is convenient for centralized treatment. Moreover, since the collection tank 46 is located on one side of the side hole 41, that is, at the other end of the side hole 41 relative to the steam chamber 23. When the water droplets condensed in the steam chamber 23 gather and flow into the collection tank 46 along the side hole 41, the gathered water is mixed with the tar liquid in the collection tank 46, so that the relatively viscous tar liquid is diluted after being mixed with the hot water, which is convenient for subsequent discharge treatment.

[0047] Further, the high-temperature steam is conveyed along the air delivery pipe 22 into the steam chamber 23, and the high-temperature steam is connected to the air delivery pipe 22 by a steam boiler and a conveying pipeline. Then the steam boiler is used to convey high-temperature steam to the air delivery pipe 22.

[0048] The outer tube 2 and the inner tube 21 are respectively made of corrosion-resistant stainless steel.

[0049] Further, the tail gas is discharged into the liquid in the tank body 1 after passing through the thin-walled rubber tube 49. At this time, bubbles are generated in the liquid in the tank body 1 by the tail gas, so that the tail gas and the liquid in the tank body 1 are in contact and mixed. Then, the filtered tail gas is discharged from the tank body 1 through the air outlet pipe 12, so as to facilitate subsequent steps such as moisture removal, further filtration, and high-temperature combustion. The waste liquid pipe 14 can facilitate the discharge of the liquid used in the tank body 1 for a long time, and the overflow port 15 can ensure the height of the liquid in the tank body 1, and the excess liquid is discharged along the overflow port 15.

[0050] In the above technical solution, high-temperature steam is introduced into the steam cavity 23 to heat the inner pipe 21. Then, when the RTO tail gas enters the inner pipe 21, the tar droplets accumulated on the inner wall of the inner pipe 21 are in a high-temperature state due to the inner pipe 21, so that the condensation of the tar droplets is reduced, and the tar droplets flow smoothly and gather in the collection tank 46 for interception and collection, thereby reducing the problem that the tar droplets flow to the bottom pipe 47 close to the liquid in the tank body 1 and condense and block.

[0051] As a further embodiment provided by the present invention, it includes a plurality of liquid outlet channels 45 opened on the bottom block 4 and respectively communicated with the collection tank 46, and a plurality of external spray pipes 24 communicated with the steam cavity 23 are arranged on the outer wall of the outer pipe 2.

[0052] Specifically, a plurality of sewage discharge pipes 25 fixedly installed on the bottom block 4 are respectively communicated with the liquid outlet channels 45. A sewage collection box 16 is fixedly installed on the outer wall of the tank body 1, and the plurality of sewage discharge pipes 25 are respectively communicated with the sewage collection box 16, and the overflow port 15 is communicated with the sewage collection box 16. Therefore, the oil stains and impurities floating on the tank body 1 flow into the sewage collection box 16 along the overflow port 15. After the tar droplets accumulated on the inner wall of the inner pipe 21 are intercepted and collected in the collection tank 46, they flow into the sewage collection box 16 through the liquid outlet channels 45 and the sewage discharge pipes 25 for collection. At the same time, the high-temperature steam in the steam cavity 23 is sprayed onto the inside of the tank body 1 along the spray nozzles 26 opened on the external spray pipes 24. At this time, the tail gas passes through the thin-walled rubber tube 49 and is discharged to one side of the outer wall of the outer pipe 2 outside the tank body 1. Then, under the action of the high-temperature steam sprayed downward by the spray nozzles 26, the tail gas passing through the liquid in the tank body 1 is mixed and reacted with the high-temperature steam sprayed by the spray nozzles 26 again, so as to improve the filtering effect on the tail gas. At the same time, the sewage discharge pipes 25 are located below the spray nozzles 26, and the sewage discharge pipes 25 can be heated by the spraying of the spray nozzles 26, so as to increase the temperature of the sewage discharge pipes 25 to facilitate the flow of the sewage in the sewage discharge pipes 25.

[0053] As another embodiment provided by the present invention, a right-angle sealing plate 5 is respectively hinged in a plurality of spray nozzles 28 opened on the inner wall of the inner pipe 21, and a main torsion spring 51 arranged on the right-angle sealing plate 5 closes the spray nozzles 28 in the default state.

[0054] Specifically, the main torsion spring 51 is sleeved on the hinge shaft of the right-angle sealing plate 5, and both ends of the main torsion spring 51 are fixedly installed on the right-angle sealing plate 5 and the inner tube 21 respectively.

[0055] Furthermore, since the main torsion spring 51 closes the nozzle 28 with the right-angle sealing plate 5 in the default state, the nozzle 28 is opened by driving the right-angle sealing plate 5 to flip into the inner tube 21. At this time, the high-temperature steam in the steam chamber 23 is sprayed into the inner tube 21 along the nozzle 28. Then, the high-temperature steam contacts the tail gas flowing in the inner tube 21, and the tail gas discharged from the inner tube 21 is heated by the high-temperature steam, so that the tail gas is heated up. When the high-temperature steam mixed with the tail gas flows into the bottom tube 47, the bottom tube 47 can be heated further, thereby further reducing the condensation of tar in the tail gas on the inner wall of the bottom tube 47. And the moisture in the steam will be mixed or reacted with the volatile organic compounds VOCs in the tail gas in advance, so as to react in advance when the tail gas immerses into the liquid in the tank body 1, so as to improve the absorption effect on the organic compound VOCs. And when the high-temperature steam condenses into water droplets on the inner wall of the bottom tube 47, the flowing down of the water droplets will carry away some impurities adhered to the inner wall of the bottom tube 47.

[0056] Furthermore, the right-angle sealing plate 5 can be flipped by the pushing of an electric push rod; or by a motor cooperating with a gear and a rack; or by any other way known to those skilled in the art to drive the right-angle sealing plate 5 to flip.

[0057] As another embodiment provided by the present invention, it includes a pushing ring 31 movably arranged in the steam chamber 23 and movably assembled with a plurality of right-angle sealing plates 5 respectively to open the nozzle 28, and further includes a sealing ring 34 fixedly connected to the pushing ring 31.

[0058] Specifically, it includes a vertical rod 3, and the pushing ring 31 and the sealing ring 34 are respectively fixedly installed on the vertical rod 3. The vertical rod 3 moves downward to drive the pushing ring 31 and the sealing ring 34 to move downward at the same time, so that the sealing ring 34 moves downward to block one end port of the outer spray pipe 24 located in the steam chamber 23. At the same time, the pushing ring 31 moves downward to push a plurality of right-angle sealing plates 5 to flip into the inner tube 21 at the same time, so that a plurality of nozzles 28 are opened simultaneously. At this time, because the outer spray pipe 24 is closed, most of the high-temperature steam in the steam chamber 23 is sprayed into the inner tube 21 from the nozzle 28. Thus, the high-temperature steam can better clean the inner tube 21 and the like.

[0059] Furthermore, the vertical rod 3 can be moved downward by the pushing of an electric push rod; or by a motor cooperating with a gear and a rack; or by any other way known to those skilled in the art to drive the vertical rod 3 to move downward.

[0060] As another embodiment provided by the present invention, it includes a conical cover 6 and a pressing ring 65 fixedly installed thereon, and the pressing ring 65 is movably arranged in the collecting groove 46.

[0061] Specifically, a plurality of support pipes 64 are fixedly installed on the conical cover 6. The air inlet ports 66 opened on the pressure ring 65 are respectively communicated with the support pipes 64. A curved cavity 63 communicated with the support pipes 64 is opened on the conical cover 6, and a single-vent valve 67 is arranged in the air inlet port 66.

[0062] Furthermore, a support box 13 is fixedly installed at the bottom of the tank body 1, and a main electric push rod 8 is fixedly installed in the support box 13. The main spindle rod 81 fixedly installed on the conical cover 6 is slidably arranged on the tank body 1, and the output end of the main electric push rod 8 is fixedly installed at the bottom end of the main spindle rod 81.

[0063] Even further, by driving the main spindle rod 81 to move downward by using the main electric push rod 8, at this time the conical cover 6 moves downward accordingly so that the pressure ring 65 moves in the collecting groove 46, and the single-vent valve 67 is closed. Then, the pressure ring 65 can scrape the inner walls on the opposite sides of the collecting groove 46, thereby cleaning the collecting groove 46 to a certain extent. Then, when the main electric push rod 8 drives the conical cover 6 to move upward, at this time the single-vent valve 67 is opened, and then it is convenient for air to flow along the curved cavity 63 and the support pipes 64 and enter the collecting groove 46 through the single-vent valve 67 to reduce the problem of liquid backflow.

[0064] As the optimal embodiment provided by the present invention, it includes a main gasket 43 and an auxiliary gasket 48 located on the inner walls on the opposite sides of the collecting groove 46. The pressure ring 65 is respectively movably arranged on the main gasket 43 and the auxiliary gasket 48 and presses the main gasket 43 to block the side hole 41.

[0065] Specifically, the top edges of the main gasket 43 and the auxiliary gasket 48 are respectively fixedly installed on the inner wall of the collecting groove 46. A liquid discharge hole 44 is opened on the main gasket 43. The main gasket 43 is curved in the default state. There is a certain gap between the main gasket 43 and the side hole 41 on the bottom block 4. When the water droplets condensed in the steam cavity 23 gather and flow along the side hole 41, at this time the gathered water flows along the liquid discharge hole 44 to between the main gasket 43 and the auxiliary gasket 48, thereby mixing with the tar liquid flowing between the main gasket 43 and the auxiliary gasket 48 to form a mixed liquid. Then, the mixed liquid flows along the liquid outlet channel 45 to the sewage pipe 25.

[0066] Further, when the main electric push rod 8 drives the main shaft rod 81 to move downward, at this time, the pressing ring 65 enters the collecting groove 46 and squeezes the main gasket 43 and the auxiliary gasket 48 respectively. At this time, the tar liquid on the main gasket 43 and the auxiliary gasket 48 is scraped off through the pressing ring 65. At the same time, the main gasket 43 and the auxiliary gasket 48 are squeezed and deformed to fit the inner walls on the opposite sides of the collecting groove 46 respectively. Then, the side hole 41 is blocked by using the main gasket 43. By using the main gasket 43 and the auxiliary gasket 48, a certain seal is achieved between the pressing ring 65 and the collecting groove 46. When the pressing ring 65 moves into the collecting groove 46, the accumulated sewage in the collecting groove 46 can be pushed, thereby accelerating the flow of the sewage and reducing the probability of blockage caused by insufficient fluidity during natural flow.

[0067] Furthermore, by blocking the side hole 41 for a certain period of time, so that more water accumulates in the side hole 41. Then, when the pressing ring 65 moves upward and the main gasket 43 resets, the water accumulated in the side hole 41 quickly flows along the drain hole 44 to the space between the main gasket 43 and the auxiliary gasket 48, thereby achieving a certain flushing effect on the collecting groove 46.

[0068] As another embodiment provided by the present invention, it includes a chamfer edge 42 provided on the bottom block 4. When the conical cover 6 moves down to the lowest position, it fits on the chamfer edge 42, and the right-angle sealing plate 5 flips to open the nozzle 28.

[0069] Specifically, since the conical cover 6 is movably arranged in the inner tube 21, the RTO tail gas flowing along the inner tube 21 will impact the top surface of the conical cover 6. Then, the RTO tail gas is blocked and flows through the gap between the side of the conical cover 6 and the inner wall of the inner tube 21. When the blocked RTO tail gas contacts the conical cover 6, part of the tar will condense on the conical cover 6. Then, the tar liquid flows along the top surface of the conical cover 6 to the side, and then the tar liquid detaches from the conical cover 6 and flows downward into the collecting groove 46 for collection, thereby further reducing the problem of tar in the RTO tail gas contacting and condensing with the thin-walled rubber tube 49 close to the liquid in the tank body 1.

[0070] Further, when the conical cover 6 moves down to the lowest position and fits on the chamfer edge 42, at this time, the conical cover 6 cooperates with the chamfer edge 42 and the inner wall of the inner tube 21 to form a liquid-containing cavity. Then, when the right-angle sealing plate 5 flips to open the nozzle 28, high-temperature steam is sprayed on the top surface of the conical cover 6, thereby cleaning the top surface of the conical cover 6 by using the high-temperature steam. At the same time, the water droplets condensed on the conical cover 6 will flow into the formed liquid-containing cavity for accumulation. Then, when the cleaning of the conical cover 6 is stopped and the conical cover 6 is driven to move upward, the sewage accumulated in the liquid-containing cavity will quickly flow into the collecting groove 46. And when the pressing ring 65 moves upward to open the collecting groove 46, the accumulated sewage is collected and quickly flushes the collecting groove 46, thereby cleaning the collecting groove 46 to a certain extent.

[0071] As another embodiment provided by the present invention, shutter plates 7 are respectively hingedly arranged in window grooves 61 formed in a circular array on the conical cover 6, and the extrusion rods 72 slidably arranged on the conical cover 6 are respectively movable on the chamfered edges 42 and push the shutter plates 7 to flip.

[0072] Specifically, a secondary torsion spring 71 is sleeved on the hinge shaft of the shutter plate 7, and both ends of the secondary torsion spring 71 are respectively fixedly installed on the shutter plate 7 and the conical cover 6. In the default state, the secondary torsion spring 71 causes the shutter plate 7 to turn up and block the window groove 61. At the same time, the shutter plate 7 pushes the first end of the extrusion rod 72 so that the second end of the extrusion rod 72 extends out of the side of the conical cover 6.

[0073] When the main electric push rod 8 drives the conical cover 6 to move downward, at this time, the conical cover 6 and the second end of the extrusion rod 72 gradually approach the chamfered edge 42. When the second end of the extrusion rod 72 fits on the chamfered edge 42, as the conical cover 6 continues to move downward, the extrusion rod 72 is squeezed by the chamfered edge 42 and slides into the conical cover 6. When the extrusion rod 72 slides into the conical cover 6, at this time, as Figure 9 shown, the extrusion rod 72 is used to push the shutter plate 7 to swing downward. Further, when the conical cover 6 fits on the chamfered edge 42, the window groove 61 is opened. Then, when the right-angle sealing plate 5 flips open the nozzle 28, the high-temperature steam in the steam chamber 23 is used to impact the top surface of the conical cover 6. At the same time, the RTO tail gas in the inner pipe 21 can continue to flow along the window groove 61 and continue to mix with the liquid in the tank body 1. Thus, while not blocking the tail gas in the inner pipe 21, the top surface of the conical cover 6 can be cleaned. At the same time, some water droplets condensed on the conical cover 6 will flow to the liquid storage cavity formed between the conical cover 6, the chamfered edge 42, and the inner wall of the inner pipe 21 for accumulation.

[0074] Further, when the main electric push rod 8 drives the conical cover 6 to move upward, the secondary torsion spring 71 resets to make the shutter plate 7 turn up and block the window groove 61 again. At the same time, the shutter plate 7 pushes the first end of the extrusion rod 72 to make the second end of the extrusion rod 72 extend out of the side of the conical cover 6 again.

[0075] As the optimal embodiment further provided by the present invention, movable grooves 27 are symmetrically formed on the inner wall of the inner pipe 21, and the pressing plates 32 fixedly connected to the pushing rings 31 are located on the path of the downward movement of the conical cover 6.

[0076] Specifically, a blocking plate 33 is fixedly installed on the pressing plate 32. In the default state, the main torsion spring 51 makes the right-angle sealing plate 5 close the nozzle 28. At this time, the pressing plate 32 is at a high position, and the movable groove 27 is in an open state. Further, a part of the high-temperature steam in the steam chamber 23 can enter the inner pipe 21 along the movable groove 27 and mix with the RTO tail gas in the inner pipe 21 in advance, and the tail gas is heated to a certain extent.

[0077] Further, as Figure 11As shown, the conical cover 6 is symmetrically provided with embedded grooves 62. When the main electric push rod 8 drives the conical cover 6 to move downward, at this time the conical cover 6 approaches the pressing plate 32. Then when the conical cover 6 fits on the pressing plate 32 and continues to move downward, it drives the pressing plate 32 to approach the chamfered edge 42. When the pressing plate 32 moves downward, at this time the pressing plate 32 drives the extrusion ring 31 and the sealing ring 34 to move downward simultaneously through the vertical rod 3. Then the sealing ring 34 moves downward to block one end of the outer spray pipe 24 located in the steam chamber 23, and at the same time the extrusion ring 31 moves downward to simultaneously push multiple right-angled sealing plates 5 to turn inward into the inner pipe 21, so that multiple spray ports 28 are opened simultaneously. At this time, because the outer spray pipe 24 is closed, most of the high-temperature steam in the steam chamber 23 is sprayed into the inner pipe 21 from the spray ports 28. And when the conical cover 6 fits on the chamfered edge 42, at this time the pressing plate 32 fits on the chamfered edge 42 and is located in the embedded groove 62. At this time, the blocking plate 33 blocks the movable groove 27. Then, under the fitting between the pressing plate 32 and the conical cover 6 and the condition that the movable groove 27 is blocked, the conical cover 6 cooperates with the chamfered edge 42 and the inner wall of the inner pipe 21 to still form a liquid-containing cavity. Thus, when the conical cover 6 moves upward, most of the sewage in the liquid-containing cavity flows along the gap between the conical cover 6 and the chamfered edge 42 into the collection tank 46 for collection and flushing the collection tank 46. At the same time, the main torsion spring 51 on the right-angled sealing plate 5 drives the right-angled sealing plate 5 to turn again to close the spray port 28, and when the right-angled sealing plate 5 turns and resets, it will push the extrusion ring 31 to move upward and reset, and then the pressing plate 32 moves upward and resets synchronously with the extrusion ring 31.

[0078] A treatment method for an RTO tail gas multi-stage treatment device includes the following operation steps:

[0079] S1. High-temperature steam is transported into the steam chamber 23 along the gas transmission pipe 22, and then the high-temperature steam is used to heat the inner pipe 21 so that the tail gas flowing in the inner pipe 21 is heated. When the tar in the tail gas accumulates on the inner wall of the inner pipe 21, it is heated and flows downward, thereby reducing the condensation of tar on the inner wall of the inner pipe 21. At the same time, the high-temperature steam in the steam chamber 23 is sprayed out from the spray nozzles 26 on the outer spray pipe 24. Thus, the RTO tail gas discharged to the outside of the outer wall of the inner pipe 2 of the tank body 1 after passing through the thin-walled rubber pipe 49, under the action of the high-temperature steam sprayed downward from the spray nozzles 26, is mixed and reacted with the high-temperature steam sprayed from the spray nozzles 26 again, thereby improving the filtering effect on the tail gas. At the same time, a part of the high-temperature steam in the steam chamber 23 enters the inner pipe 21 along the movable groove 27 and is premixed with the RTO tail gas in the inner pipe 21, and the tail gas is heated to a certain extent;

[0080] S2. When the conical cover 6 is driven by the main electric push rod 8 to move downward, at this time, the pressing ring 65 enters the collecting groove 46 and squeezes the main gasket 43 and the auxiliary gasket 48 respectively. At this time, the tar liquid on the main gasket 43 and the auxiliary gasket 48 is scraped off by the pressing ring 65. At the same time, the main gasket 43 and the auxiliary gasket 48 are squeezed and deformed to fit on the opposite inner walls of the collecting groove 46 respectively. When the pressing ring 65 moves into the collecting groove 46, the accumulated sewage in the collecting groove 46 can be squeezed and pushed, thereby accelerating the flow of the sewage;

[0081] S3. Due to the downward movement of the conical cover 6, at this time, the second end of the extrusion rod 72 on the conical cover 6 gradually approaches the chamfered edge 42. When the second end of the extrusion rod 72 fits on the chamfered edge 42, as the conical cover 6 continues to move downward, the extrusion rod 72 is squeezed by the chamfered edge 42 and slides into the conical cover 6. When the extrusion rod 72 slides into the conical cover 6, the lower swing of the shielding plate 7 is pushed by the extrusion rod 72, so that the RTO tail gas in the inner pipe 21 can continue to flow along the window groove 61 and continue to mix with the liquid in the tank body 1;

[0082] S4. When the conical cover 6 moves downward, at this time, the conical cover 6 pushes the pressing plate 32 downward so that the pressing plate 32 fits on the chamfered edge 42 and is located in the embedding groove 62, and the blocking plate 33 blocks the movable groove 27. Then, under the fitting between the pressing plate 32 and the conical cover 6 and the condition that the movable groove 27 is blocked, the conical cover 6 cooperates with the chamfered edge 42 and the inner wall of the inner pipe 21 to form a liquid-containing cavity. At the same time, when the pressing plate 32 moves downward, at this time, the pressing plate 32 drives the extrusion ring 31 and the sealing ring 34 to move downward through the vertical rod 3. Then, the sealing ring 34 moves downward to block one end of the outer spray pipe 24 located in the steam cavity 23, and at the same time, the extrusion ring 31 moves downward to push a plurality of right-angle sealing plates 5 to turn inward into the inner pipe 21, so that a plurality of spray ports 28 are opened simultaneously. At this time, because the outer spray pipe 24 is closed, most of the high-temperature steam in the steam cavity 23 is sprayed into the inner pipe 21 from the spray ports 28. By spraying the high-temperature steam on the top surface of the conical cover 6, the top surface of the conical cover 6 is cleaned by the high-temperature steam. At the same time, the water droplets condensed on the conical cover 6 will flow into the formed liquid-containing cavity for accumulation;

[0083] S5. After cleaning, the main electric push rod 8 is reused to drive the conical cover 6 to move upward, so that the pressing ring 65 gradually disengages from the main gasket 43, and then the main gasket 43 resets to open the side hole 41. At this time, the water accumulated in the side hole 41 quickly flows along the drain hole 44 to between the main gasket 43 and the auxiliary gasket 48, thereby achieving a certain flushing effect on the collecting tank 46. At the same time, most of the sewage in the liquid storage cavity flows along the gap between the conical cover 6 and the chamfered edge 42 into the collecting tank 46 for collection and flushing of the collecting tank 46. Then, the main torsion spring 51 on the right-angle sealing plate 5 drives the right-angle sealing plate 5 to flip and close the spray nozzle 28 again. When the right-angle sealing plate 5 flips and resets, it will push the extrusion ring 31 upward to reset, and then the pressing plate 32 moves upward and resets synchronously with the extrusion ring 31. The secondary torsion spring 71 resets to make the shutter 7 turn up and block the window groove 61 again. At the same time, the shutter 7 pushes the first end of the extrusion rod 72 to extend the second end of the extrusion rod 72 out of the side of the conical cover 6 again.

[0084] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An RTO tail gas multi-stage treatment device, characterized in that, It includes a tank body (1) and a steam chamber (23) formed by enclosing between an outer pipe (2) and an inner pipe (21) arranged therein. The flow blocking unit arranged in the tank body (1) includes: A bottom block (4) which is arranged at the bottom of the inner pipe (21), and a side hole (41) is opened thereon, one end of which communicates with the steam chamber (23), and the other end communicates with the inner side of the inner pipe (21); A bottom pipe (47) which is located on the bottom block (4) and encloses with the bottom block (4) to form a collecting groove (46), and the collecting groove (46) is located on one side of the side hole (41) and communicates with the inner pipe (21); It includes a plurality of liquid outlet channels (45) opened on the bottom block (4) and respectively communicating with the collecting groove (46), and a plurality of outer spray pipes (24) communicating with the steam chamber (23) are arranged on the outer wall of the outer pipe (2); It includes a pushing ring (31) movably arranged in the steam chamber (23) and respectively movably assembled with a plurality of right-angle sealing plates (5) to open the spray openings (28), and a sealing ring (34) fixedly connected with the pushing ring (31); It includes a conical cover (6) and a pressing ring (65) fixedly installed thereon, and the pressing ring (65) is movably arranged in the collecting groove (46); It includes a main ring gasket (43) and an auxiliary ring gasket (48) on the inner walls of the two opposite sides of the collecting groove (46), and the pressing ring (65) is respectively movably arranged on the main ring gasket (43) and the auxiliary ring gasket (48) and presses the main ring gasket (43) to block the side hole (41); It includes a chamfered edge (42) arranged on the bottom block (4). When the conical cover (6) moves down to the lowest position, it fits on the chamfered edge (42), and the right-angle sealing plate (5) flips to open the spray opening (28).

2. The RTO tail gas multi-stage treatment device according to claim 1, wherein A plurality of spray openings (28) opened on the inner wall of the inner pipe (21) are respectively hinged with right-angle sealing plates (5), and a main torsion spring (51) arranged on the right-angle sealing plate (5) closes the spray opening (28) in the default state.

3. The RTO tail gas multi-stage treatment device according to claim 1, characterized in that, A plurality of shutter plates (7) are respectively hinged in circular-arrayed window grooves (61) opened on the conical cover (6), and extrusion rods (72) slidably arranged on the conical cover (6) respectively move on the chamfered edge (42) and push the shutter plates (7) to flip.

4. The RTO tail gas multi-stage treatment device according to claim 1, characterized in that, The inner wall of the inner pipe (21) is symmetrically provided with movable grooves (27), and a pressing plate (32) fixedly connected to the pushing ring (31) is located on the moving path of the conical cover (6) moving down.

5. A treatment method for a multi-stage treatment device for RTO tail gas, characterized in that, It includes the following operation steps of the RTO tail gas multi-stage treatment device according to any one of claims 1-4: S1. The RTO tail gas enters the inner pipe (21), and the high-temperature steam enters the steam chamber (23) so that the high-temperature steam heats the inner pipe (21), and a part of the high-temperature steam sprays out along the outer spray pipe (24) to contact and mix with the filtered RTO tail gas again; S2. The conical cover (6) moves down so that the pressing ring (65) enters the collecting groove (46) and scrapes the main ring gasket (43) and the auxiliary ring gasket (48), and the main ring gasket (43) deforms to block the side hole (41); S3. When the conical cover (6) moves down to approach the chamfered edge (42), the extrusion rods (72) respectively move on the chamfered edge (42) and push the shutter plates (7) to flip; S4. When the pressing plate (32) fixedly connected to the extrusion and pushing ring (31) is pushed and moved downward by the conical cover (6), the extrusion and pushing ring (31) moves downward to simultaneously push and move multiple right-angled sealing plates (5) to turn over; S5. When the conical cover (6) moves upward, the side hole (41) is opened, and the conical cover (6) disengages from the chamfered edge (42).

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