Chlorinated tail gas treatment recovery unit

Abstract

The application discloses a chlorination tail gas treatment and recovery device and relates to the technical field of chlorination tail gas treatment. The device comprises a treatment box, a tail gas discharge pipe and a circulating pump. The tail gas discharge pipe is connected to the top side of the treatment box. The bottom side of the treatment box is connected with the circulating pump. One side of the treatment box is connected with a filter box. A liquid return pipe is arranged between the filter box and the output end of the circulating pump. After the chlorination tail gas is introduced into the absorption solution in the treatment box, the chlorides can react with the absorption solution. Meanwhile, the circulating pump drives the solution to circulate, so that the solid reaction products generated in the reaction are taken away together, and the solid reaction products enter the filter box to be filtered down. Meanwhile, the flowing liquid impacts the rotating fan blades, the scraping strips rotatingly arranged on the first filter screen plate in the filter box are linked, the scraped solid products are conveniently cleaned out, and the recovery treatment is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chlorination tail gas treatment, in particular to a chlorination tail gas treatment and recovery device. BACKGROUND

[0002] Chlorine can react with organic or inorganic substances to generate various chlorides through substitution or addition reactions. When chlorine is introduced into a reactor for chlorination reaction, the tail gas after the reaction generally contains some chloride gas, which is generally acidic and needs to be treated. Generally, the tail gas is introduced into an alkaline solution to react with the chloride gas. Some solid products are generated during the reaction process and need to be recovered and treated.

[0003] The existing chlorination tail gas treatment equipment mainly includes a reaction solution tank and a tail gas conduit. The tail gas conduit is connected with the reaction solution tank and the end of the tail gas conduit is inserted into the reaction solution to facilitate the introduction of the tail gas into the solution for absorption reaction treatment. The solid products generated during the absorption reaction process directly precipitate at the bottom of the tank body and are periodically recovered and cleaned.

[0004] The existing chlorination tail gas treatment equipment has the following disadvantages: when the existing chlorination tail gas treatment equipment treats chlorination tail gas by using a solution, although the chlorides in the tail gas can be effectively treated, some precipitates generated by the reaction fall to the bottom of the solution tank. The solution needs to be emptied or the precipitates need to be fished out with a filter screen, which is not convenient for cleaning and recovery. In addition, solution loss may occur during the recovery and treatment process. SUMMARY

[0005] The present application aims to provide a chlorination tail gas treatment and recovery device to solve the technical problem of the existing chlorination tail gas treatment equipment which is not convenient for recovering and treating reaction precipitates.

[0006] The technical problem addressed by the present application can be solved by the following technical solution:

[0007] The chlorination tail gas treatment and recovery device comprises a treatment tank and a tail gas discharge pipe, wherein the tail gas discharge pipe is connected to the top side of the treatment tank.

[0008] The bottom side of the treatment tank is connected with a circulating pump. One side of the treatment tank is connected with a filter tank. A liquid return pipe is arranged between the filter tank and the output end of the circulating pump. A first filter screen plate is arranged inside the filter tank. A return pipe head is connected between the bottom side of the filter tank and the treatment tank.

[0009] The side wall of the filter box is provided with a residue discharging port flush with the upper end surface of the first filter screen plate, a linkage shaft is rotatably connected to the side wall of the filter box near the liquid return pipe, a scraping strip is connected to the bottom end of the linkage shaft, and the scraping strip penetrates through the residue discharging port, the scraping strip cooperates with the upper end surface of the first filter screen plate, a rotating fan blade is rotatably arranged in the liquid return pipe, and a transmission assembly is arranged between the rotating fan blade and the linkage shaft.

[0010] A collecting box is arranged below the side of the filter box near the residue discharging port, a second filter screen plate is arranged at the bottom of the collecting box, a supporting assembly cooperating with the collecting box is connected to the bottom of the filter box, a flow guide pipe is arranged at the bottom of the supporting assembly, and the end of the flow guide pipe is connected to the treatment box.

[0011] A rotating impact assembly is rotatably arranged in the filter box, the end of the liquid return pipe connected to the filter box cooperates with the rotating impact assembly, one side of the collecting box is connected with an elastic tab, the elastic tab is inserted into the filter box, and the elastic tab cooperates with the rotating impact assembly.

[0012] As a further scheme of the present application, the rotating impact assembly comprises a rotating column and impact blades, the rotating column is rotatably connected in the filter box, and the rotating column is below the first filter screen plate, a plurality of impact blades are arranged, and the plurality of impact blades are distributed in the circumferential direction of the rotating column, the impact blades on one side of the rotating column are aligned with the port of the liquid return pipe, and the end of the elastic tab is on the rotating track of the impact blades.

[0013] As a further scheme of the present application, the end of each impact blade is connected with an impact convex ball.

[0014] As a further scheme of the present application, a spiral pipe is connected between one end of the liquid return pipe and the output end of the circulating pump, and the other end of the liquid return pipe is connected to the top end of the filter box.

[0015] As a further scheme of the present application, the transmission assembly comprises a first steering helical gear ring and a second steering helical gear ring, the first steering helical gear ring is coaxially connected with the rotating fan blade, the second steering helical gear ring is rotatably arranged in the liquid return pipe, the second steering helical gear ring is coaxially connected with the rotating end of the linkage shaft, and the second steering helical gear ring and the first steering helical gear ring are in meshing engagement.

[0016] As a further scheme of the present application, the supporting assembly comprises a supporting plate and a limiting clamping groove, the supporting plate is connected to one side of the bottom of the filter box, the limiting clamping groove is arranged on the supporting plate, the collecting box is clamped in the limiting clamping groove, and the end of the flow guide pipe near the collecting box is connected to the bottom of the supporting plate.

[0017] As a further scheme of the present application, the collecting box is an elastic thin-walled box body.

[0018] The beneficial effects of the present application are as follows:

[0019] 1、The chlorination tail gas is introduced into the absorption solution in the treatment box, the chlorides can react with the absorption solution, and the circulating pump drives the solution to circulate, so that the solid reaction products generated in the reaction are taken away together, so that the solid reaction products enter the filter box and are filtered down, and the flowing liquid impacts the rotating fan blades, the rotating fan blades rotate the scraping strips linked to the first filter screen plate in the filter box, so that the filtered solid products are easily cleaned out and recycled.

[0020] 2、The liquid adhered to the solid products cleaned in the filter box can pass through the second filter screen plate at the bottom of the collection box, and then return to the treatment box through the flow guide pipe, and the solution entering the filter box can impact the impact blades on the rotating column, the impact blades rotate under the impact, and the elastic tab connected to the collection box is vibrated in the rotating process, so that the collection box vibrates, so as to facilitate the liquid adhered to the recycled solid products to separate and return to the treatment box, reducing the loss of the solution. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in conjunction with the drawings.

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is Figure 1 is an enlarged structure schematic diagram of position A in

[0024] Figure 3 is Figure 2 is an enlarged structure schematic diagram of position B in

[0025] Figure 4 is a schematic diagram of the top view of the collection box and the filter box in the present application.

[0026] In the figure: 1, treatment box; 2, tail gas discharge pipe; 3, circulating pump; 4, spiral pipe; 5, liquid return pipe; 6, filter box; 7, rotating fan blade; 8, first steering helical gear ring; 9, second steering helical gear ring; 10, linkage shaft; 11, scraping strip; 12, collection box; 13, supporting plate; 14, flow guide pipe; 15, backflow pipe head; 16, first filter screen plate; 17, rotating column; 18, impact blade; 19, impact convex ball; 20, elastic tab; 21, limiting clamping groove; 22, second filter screen plate; 23, residue discharge port. DETAILED DESCRIPTION

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0028] As shown in Figures 1-4 The chlorination tail gas treatment and recovery device includes a treatment tank 1 and a tail gas discharge pipe 2. The treatment tank 1 is internally provided with a certain amount of alkali solution as a chloride absorption treatment solution. The tail gas discharge pipe 2 is connected to a top side of the treatment tank 1 and extends to the bottom of the treatment tank 1. The tail gas discharge pipe 2 is used to guide the tail gas mixed with chlorides into the treatment solution, so that the chlorides in the tail gas react with the alkaline treatment solution. An exhaust pipe is arranged at the top of the treatment tank 1 and used to exhaust the gas that is not soluble in the treatment solution.

[0029] A circulating pump 3 is connected to a bottom side of the treatment tank 1. The liquid inlet end of the circulating pump 3 is used to draw out the treatment solution in the treatment tank 1. A filter tank 6 is connected to a side of the treatment tank 1. A return liquid pipe 5 is arranged between the filter tank 6 and the output end of the circulating pump 3. A spiral pipe 4 is connected between one end of the return liquid pipe 5 and the output end of the circulating pump 3. The spiral pipe 4 is used to extend the transmission distance of the return liquid pipe 5 and facilitate the reaction of the treatment solution drawn out by the circulating pump 3 and the mixed chlorides. The other end of the return liquid pipe 5 is connected to the top end of the filter tank 6. The solution flowing in the return liquid pipe 5 drives the solid precipitates generated after the reaction to flow into the filter tank 6. A first filter screen plate 16 is arranged in the filter tank 6. The first filter screen plate 16 is used to filter and block the solid precipitates generated in the reaction solution, and the solution passes through the first filter screen plate 16. A return flow pipe head 15 is connected between a bottom side of the filter tank 6 and the treatment tank 1. The return flow pipe head 15 is used to guide the solution back into the treatment tank 1, so as to facilitate the continuous treatment of the solution on the chlorination tail gas.

[0030] A slag discharge port 23, flush with the upper surface of the first filter screen plate 16, is provided on the side wall of the filter box 6. A linkage shaft 10 is rotatably connected to the return pipe 5 near the side wall of the filter box 6. A scraper 11 is connected to the bottom end of the linkage shaft 10 and passes through the slag discharge port 23. The scraper 11 cooperates with the upper surface of the first filter screen plate 16. A rotating fan blade 7 is rotatably installed inside the return pipe 5. The rotating fan blade 7 can rotate under the action of liquid impact. A transmission assembly is provided between the rotating fan blade 7 and the linkage shaft 10. The transmission assembly includes a first steering helical gear ring 8 and a second steering helical gear ring 9. The first steering helical gear ring 8 is coaxially connected to the rotating fan blade 7, and the first steering helical gear ring 8 and the rotating fan blade 7 rotate synchronously. The second steering helical gear ring 9 is rotatably disposed inside the return pipe 5, and the second steering helical gear ring 9 is coaxially connected to the rotating end of the linkage shaft 10. The second steering helical gear ring 9 and the first steering helical gear ring 8 mesh with each other. When the liquid flowing in the return pipe 5 impacts the rotating fan blade 7, the rotating fan blade 7 rotates, and the first steering helical gear ring 8 rotates with the rotating fan blade 7. Then the second steering helical gear ring 9 rotates with the first steering helical gear ring 8, and the second steering helical gear ring 9 drives the linkage shaft 10 to rotate. The linkage shaft 10 drives the scraper 11 to rotate, thereby facilitating the scraping of solid reaction products on the first filter screen plate 16 from the slag discharge port 23, avoiding accumulation on the first filter screen plate 16 and affecting the filtration effect.

[0031] A collection box 12 is provided below the side of the filter box 6 near the slag discharge port 23. A second filter screen 22 is provided at the bottom of the collection box 12. A support assembly that cooperates with the collection box 12 is connected to the bottom of the filter box 6. A guide pipe 14 is provided at the bottom of the support assembly, and the end of the guide pipe 14 is connected to the treatment box 1. The solid reactants discharged from the slag discharge port 23 fall into the collection box 12, while the liquid adhering to the solid reactants can fall through the second filter screen 22 and then flow back into the treatment box 1 through the guide pipe 14.

[0032] The support assembly includes a tray 13 and a limiting slot 21. The tray 13 is connected to the bottom side of the filter box 6, and the limiting slot 21 is opened on the tray 13. The collection box 12 is fitted into the limiting slot 21. The end of the guide pipe 14 near the collection box 12 is connected to the bottom of the tray 13, and the guide pipe 14 communicates with the limiting slot 21. This facilitates the solution leaking from the collection box 12 to enter the guide pipe 14 and return to the treatment box 1.

[0033] The filter box 6 is equipped with a rotating impact assembly. The end of the return pipe 5 connected to the filter box 6 is engaged with the rotating impact assembly. The rotating impact assembly includes a rotating column 17 and impact blades 18. The rotating column 17 is rotatably connected inside the filter box 6 and is located below the first filter screen plate 16. Multiple impact blades 18 are provided and are circumferentially distributed on the rotating column 17. The impact blades 18 on one side of the rotating column 17 are aligned with the port of the return pipe 5. When the solution flows downward from the port of the return pipe 5 into the filter box 6, the solution impacts the impact blades 18 on one side of the rotating column 17, thereby causing the rotating column 17 to rotate. Each impact blade 18 is connected to an impact protrusion 1 at its end. 9; The collection box 12 is an elastic thin-walled box. An elastic lever 20 is connected to one side of the collection box 12. The elastic lever 20 is inserted into the filter box 6 and cooperates with the rotating impact assembly. The end of the elastic lever 20 is on the rotation trajectory of the impact blade 18. The rotating impact blade 18 is impacted by the impact convex ball 19 and passes through the elastic lever 20 in sequence. The elastic lever 20 is deformed when it is impacted and squeezed. After the impact blade 18 passes through, the elastic lever 20 rebounds and vibrates. Since the collection box 12 is an elastic thin-walled box, the collection box 12 can vibrate together with the elastic lever 20, which facilitates the accelerated removal of liquid adhering to the solid reaction products entering the collection box 12.

[0034] The working principle of this invention is as follows: A certain amount of alkaline solution is loaded into the treatment tank 1 as the chloride absorption treatment liquid. Then, the tail gas mixed with chloride is introduced into the treatment solution through the tail gas discharge pipe 2, so that the chloride in the tail gas reacts with the alkaline treatment solution. At the same time, the circulation pump 3 is started, and the circulation pump 3 draws the reaction solution in the treatment tank 1 and introduces it into the return pipe 5. During this process, the solid products generated by the reaction can flow away with the liquid. The return pipe 5 introduces the reaction solution into the filter tank 6. The first filter plate 16 in the filter tank 6 is used to filter and block the solid precipitate generated in the reaction solution, while the solution passes through the first filter plate 16 and is then guided back into the treatment tank 1 through the return pipe head 15, so that the solution can continue to treat the chlorinated tail gas.

[0035] The liquid flowing in the return pipe 5 impacts the rotating fan blade 7. When the rotating fan blade 7 is impacted, it rotates, and the first steering helical gear ring 8 rotates with the rotating fan blade 7. Then the second steering helical gear ring 9 rotates with the first steering helical gear ring 8. The second steering helical gear ring 9 drives the linkage shaft 10 to rotate, and the linkage shaft 10 drives the scraper 11 to rotate. This facilitates the scraping of solid reaction products on the first filter screen plate 16 from the slag discharge port 23, avoiding accumulation on the first filter screen plate 16 and affecting the filtration effect. The solid reactants discharged from the slag discharge port 23 fall into the collection box 12, while the liquid adhering to the solid reactants can fall through the second filter screen plate 22 and then flow back into the processing box 1 through the guide pipe 14.

[0036] Furthermore, when the solution flows downward from the return pipe 5 into the filter box 6, the solution impacts the impact blades 18 on one side of the rotating column 17, causing the rotating column 17 to rotate. The rotating impact blades 18 rely on the impact convex balls 19 to successively impact the elastic levers 20. The elastic levers 20 deform when they are impacted and squeezed. After the impact blades 18 pass through, the elastic levers 20 rebound and vibrate. Since the collection box 12 is an elastic thin-walled box, the collection box 12 can vibrate together with the elastic levers 20, which facilitates the removal of liquid adhering to the solid reaction products entering the collection box 12 and reduces solution loss.

[0037] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A chlorination tail gas treatment and recovery device, comprising a treatment tank (1) and a tail gas discharge pipe (2), wherein the tail gas discharge pipe (2) is connected to one side of the top of the treatment tank (1); characterized in that: A circulation pump (3) is connected to one side of the bottom of the processing tank (1); a filter tank (6) is connected to one side of the processing tank (1); a return pipe (5) is provided between the filter tank (6) and the output end of the circulation pump (3); a first filter screen plate (16) is provided inside the filter tank (6); a return pipe head (15) is connected between the bottom side of the filter tank (6) and the processing tank (1); The filter box (6) has a slag discharge port (23) that is flush with the upper surface of the first filter screen plate (16) on its side wall. The return pipe (5) is rotatably connected to a linkage shaft (10) near the side wall of the filter box (6). The bottom end of the linkage shaft (10) is connected to a scraper (11), and the scraper (11) passes through the slag discharge port (23). The scraper (11) cooperates with the upper surface of the first filter screen plate (16). The return pipe (5) is rotatably equipped with a rotating fan blade (7). A transmission assembly is provided between the rotating fan blade (7) and the linkage shaft (10). A collection box (12) is provided below the side of the filter box (6) near the slag discharge port (23). A second filter screen plate (22) is provided at the bottom of the collection box (12). A support component that cooperates with the collection box (12) is connected to the bottom of the filter box (6). A guide pipe (14) is provided at the bottom of the support component, and the end of the guide pipe (14) is connected to the processing box (1). The filter box (6) is equipped with a rotating impact assembly inside. The end of the return pipe (5) connected to the filter box (6) is engaged with the rotating impact assembly. An elastic lever (20) is connected to one side of the collection box (12). The elastic lever (20) is inserted into the filter box (6) and is engaged with the rotating impact assembly. The rotating impact assembly includes a rotating column (17) and impact blades (18). The rotating column (17) is rotatably connected inside the filter box (6) and is located below the first filter plate (16). Multiple impact blades (18) are provided and are circumferentially distributed on the rotating column (17). The impact blades (18) on one side of the rotating column (17) are aligned with the port of the return pipe (5). The end of the elastic lever (20) is on the rotation trajectory of the impact blades (18). The transmission assembly includes a first steering helical gear ring (8) and a second steering helical gear ring (9). The first steering helical gear ring (8) is coaxially connected to the rotating fan blade (7). The second steering helical gear ring (9) is rotatably disposed inside the return pipe (5) and is coaxially connected to the rotating end of the linkage shaft (10). The second steering helical gear ring (9) meshes with the first steering helical gear ring (8).

2. The chlorination tail gas treatment and recovery device according to claim 1, characterized in that, Each of the impact blades (18) is connected to an impact convex ball (19) at its end.

3. The chlorination tail gas treatment and recovery device according to claim 1, characterized in that, One end of the return pipe (5) is connected to the output end of the circulation pump (3) via a spiral tube (4); the other end of the return pipe (5) is connected to the top of the filter box (6).

4. The chlorination tail gas treatment and recovery device according to claim 1, characterized in that, The support assembly includes a tray (13) and a limiting slot (21). The tray (13) is connected to the bottom side of the filter box (6). The limiting slot (21) is opened on the tray (13). The collection box (12) is fitted into the limiting slot (21). The end of the guide pipe (14) near the collection box (12) is connected to the bottom of the tray (13).

5. The chlorination tail gas treatment and recovery device according to claim 1, characterized in that, The collection box (12) is an elastic thin-walled box.

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