Acid precipitation reaction kettle

Abstract

The utility model discloses an acid precipitation reaction kettle which comprises a reaction unit and an acid adding mechanism, the reaction unit comprises a kettle body, the kettle body is provided with a reaction cavity, and the kettle body is provided with a feeding port and a discharging port which are communicated with the reaction cavity and can be closed; the acid adding mechanism comprises an acid storage box, an acid adding pipeline, a blocking piece and a driving assembly, the upper end of the acid adding pipeline is communicated with the acid storage box, the lower end of the acid adding pipeline extends into the reaction cavity, the blocking piece is arranged in the reaction cavity, and the driving assembly is connected with the blocking piece and used for driving the blocking piece to move; and the lower end of the acid adding pipeline is intermittently blocked by the blocking piece. The acid adding device has the beneficial effects that the acid adding speed can be reasonably controlled by controlling the up-and-down moving speed of the blocking piece driven by the driving assembly, and the condition of violent reaction caused by too fast acid adding is avoided, so that the safety of acid precipitation reaction is ensured.

Description

Technical Field

[0001] This utility model relates to the field of photosensitizer production technology, and in particular to an acid precipitation reaction vessel. Background Technology

[0002] Photosensitizers, also known as photoinitiators or photocuring agents, are compounds that absorb energy of a specific wavelength in the ultraviolet (250–420 nm) or visible (400–800 nm) light range, generating free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking, and curing. The preparation process of photosensitizers is relatively complex, requiring a series of equipment such as reaction vessels, oxidation vessels, synthesis vessels, alkali fusion vessels, crystallization vessels, purification vessels, filters, centrifuges, and dryers. The production of photosensitizers involves acid precipitation. The basic principle of acid precipitation is that certain substances can change from a dissolved state to a suspended state under acidic conditions, thus separating the substance from the solution. Diluted hydrochloric acid is added to the reaction vessel, and the solution is stirred to ensure uniform mixing, causing the photosensitizer to precipitate. Because heat or gas is generated during the acid precipitation process, the existing acid precipitation reactor (such as the acid precipitation reactor for the production of 2-ethylanthraquinone disclosed in application number 201922488476.5) cannot reasonably control the acid addition rate during the acid precipitation of photosensitizer, which can easily lead to excessive acid addition, thereby triggering a violent reaction, or even causing an explosion or other safety hazards. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an acid precipitation reaction vessel to solve the technical problem in the prior art that the acid addition rate cannot be reasonably controlled during the acid precipitation process, which easily leads to violent reactions caused by excessively rapid acid addition.

[0004] To achieve the above technical objectives, the present invention provides an acid precipitation reaction vessel, comprising:

[0005] A reaction unit includes a vessel body having a reaction chamber, and the vessel body having a feed port and a discharge port that are connected to and can be closed in the reaction chamber;

[0006] An acid-adding mechanism includes an acid storage tank, an acid-adding pipeline, a sealing element, and a driving assembly. The upper end of the acid-adding pipeline is connected to the acid storage tank, and the lower end of the acid-adding pipeline extends into the reaction chamber. The sealing element is disposed in the reaction chamber, and the driving assembly is connected to the sealing element to drive the sealing element to move so that the sealing element intermittently seals the lower end of the acid-adding pipeline.

[0007] Furthermore, the reaction unit also includes a jacket, which covers the outer wall of the vessel body. A cooling cavity is formed between the inner wall of the jacket and the outer wall of the vessel body. The jacket has a cooling medium inlet and a cooling medium outlet that are connected to the cooling cavity and can be closed. The cooling medium inlet is also connected to the outlet end of the external cooling system, and the cooling medium outlet is also connected to the return end of the external cooling system.

[0008] Furthermore, the acid addition pipeline includes an acid inlet pipe, a transfer pipe, a connecting pipe, and an acid outlet pipe. The acid inlet pipe is vertically arranged and penetrates the top surface of the reactor body. The upper end of the acid inlet pipe is connected to the acid storage tank. The transfer pipe is vertically arranged in the reaction chamber. A first opening and a second opening are provided on the side wall of the transfer pipe. One end of the connecting pipe is connected to the acid inlet pipe, and the other end of the connecting pipe is connected to the first opening. The acid outlet pipe is arranged in the reaction chamber, and one end of the acid outlet pipe is connected to the second opening. The sealing element is slidably arranged in the transfer pipe and can reciprocate between a first position and a second position. When the sealing element reaches the first position, the first opening and the second opening are connected. When the sealing element reaches the second position, the first opening and the second opening are disconnected.

[0009] Furthermore, the connecting pipe is a bent pipe structure, and has a first vertical section and a first horizontal section. The upper end of the first vertical section is connected to the lower end of the acid inlet pipe, one end of the first horizontal section is connected to the lower end of the first vertical section, and the other end of the first horizontal section is connected to the first opening.

[0010] Furthermore, the acid outlet pipe is a bent pipe structure, and has a second horizontal section and a second vertical section. One end of the second horizontal section is connected to the second opening, and the upper end of the second vertical section is connected to the other end of the second horizontal section.

[0011] Furthermore, the second opening is located above the first opening, and the sealing member has a flow channel. When the sealing member reaches the first position, the upper end of the flow channel is connected to the first opening, and the lower end of the flow channel is connected to the second opening. When the sealing member reaches the second position, the sealing member blocks the first opening and the second opening.

[0012] Furthermore, the flow channel has a curved structure.

[0013] Furthermore, the lower end of the adapter pipe is open, and the lower end of the sealing member extends out of the adapter pipe along the opening at the lower end of the adapter pipe. The driving assembly includes a rotating wheel, a first rotating shaft, and a first rotating driving member. The rotating wheel is disposed below the sealing member and abuts against the bottom surface of the sealing member. The first rotating shaft is horizontally disposed, with one end of the first rotating shaft eccentrically fixedly connected to the rotating wheel, and the other end of the first rotating shaft rotating through the vessel body and extending out of the vessel body. The output end of the first rotating driving member is connected to the other end of the first rotating shaft and is used to drive the first rotating shaft to rotate around its axis, so that the rotating wheel pushes the sealing member to move up and down.

[0014] Furthermore, the drive assembly also includes an elastic element, which is sleeved on the sealing element. The upper end of the elastic element abuts against the lower end of the adapter pipe, and the lower end of the elastic element abuts against the rotating wheel.

[0015] Furthermore, the elastic element is a spring.

[0016] Compared with the prior art, the beneficial effects of this utility model include: In use, the diluted acid solution is placed in the acid storage tank. By controlling the drive component, the drive component can drive the sealing component to move up and down, so that the sealing component can intermittently block the lower end of the acid adding pipeline. When the sealing component blocks the lower end of the acid adding pipeline, it can prevent the acid solution in the acid adding pipeline from flowing out. When the sealing component is removed from the lower end of the acid adding pipeline, the acid solution in the acid adding pipeline can flow out normally. By controlling the speed at which the drive component drives the sealing component to move up and down, the speed of acid addition can be reasonably controlled, avoiding violent reactions caused by excessively rapid acid addition, thereby ensuring the safety of the acid precipitation reaction. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an acid precipitation reaction vessel provided by this utility model;

[0018] Figure 2 This is a cross-sectional view of an acid precipitation reactor provided by this utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the image;

[0020] Figure 4 yes Figure 3 A schematic diagram of the structure when the sealing component reaches the second position;

[0021] In the diagram: 100 - Reaction unit, 110 - Vessel body, 111 - Reaction chamber, 112 - Feed port, 113 - Discharge port, 120 - Jacket, 121 - Cooling chamber, 122 - Cooling medium inlet, 123 - Cooling medium outlet, 130 - Valve, 200 - Acid adding mechanism, 210 - Acid adding pipeline, 211 - Acid inlet pipe, 212 - Transfer pipe, 2121 - First opening, 2122 - Second opening, 213 - Connecting pipe, 2 131 – First vertical section, 2132 – First horizontal section, 214 – Acid outlet pipe, 2141 – Second horizontal section, 2142 – Second vertical section, 220 – Sealing component, 221 – Flow passage, 230 – Drive assembly, 231 – Rotating wheel, 232 – First rotating shaft, 233 – First rotation drive component, 234 – Elastic component, 300 – Stirring mechanism, 310 – Second rotating shaft, 320 – Stirring blade, 330 – Second rotation drive component. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] This invention provides an acid precipitation reaction vessel, the structure of which is as follows: Figure 1 - Figure 3 As shown, the apparatus includes a reaction unit 100 and an acid addition mechanism 200. The reaction unit 100 includes a vessel body 110, which has a reaction chamber 111. The vessel body 110 has a feed port 112 and a discharge port 113 that are connected to and can be closed in the reaction chamber 111. The acid addition mechanism 200 includes an acid storage tank, an acid addition pipeline 210, a sealing element 220, and a drive assembly 230. The upper end of the acid addition pipeline 210 is connected to the acid storage tank, and the lower end of the acid addition pipeline 210 extends into the reaction chamber 111. The sealing element 220 is disposed in the reaction chamber 111. The drive assembly 230 is connected to the sealing element 220 and is used to drive the sealing element 220 to move so that the sealing element 220 intermittently seals the lower end of the acid addition pipeline 210.

[0024] In use, the diluted acid solution is placed into the acid storage tank. By operating the drive assembly 230, the drive assembly 230 can drive the sealing member 220 to move up and down, thereby intermittently sealing the lower end of the acid addition pipeline 210. When the sealing member 220 seals the lower end of the acid addition pipeline 210, it can prevent the acid solution in the acid addition pipeline 210 from flowing out. When the sealing member 220 is removed from the lower end of the acid addition pipeline 210, the acid solution in the acid addition pipeline 210 can flow out normally. By controlling the speed at which the drive assembly 230 drives the sealing member 220 to move up and down, the acid addition speed can be reasonably controlled to avoid violent reactions caused by excessively rapid acid addition, thereby ensuring the safety of the acid precipitation reaction.

[0025] As a preferred embodiment, please refer to Figure 1 and Figure 2 The reaction unit 100 further includes a jacket 120, which covers the outer wall of the vessel body 110. A cooling cavity 121 is formed between the inner wall of the jacket 120 and the outer wall of the vessel body 110. The jacket 120 has a cooling medium inlet 122 and a cooling medium outlet 123 that are connected to the cooling cavity 121 and can be closed. The cooling medium inlet 122 is also connected to the outlet end of an external cooling system, and the cooling medium outlet 123 is also connected to the return end of the external cooling system. Since heat is generated during the acid precipitation process, cooling medium is introduced into the cooling cavity 121 through the cooling medium inlet 122. The cooling medium will carry away the heat generated during the acid precipitation process, further ensuring the safety of the acid precipitation reaction.

[0026] As a preferred embodiment, please refer to Figure 1 and Figure 2 The reaction unit 100 further includes multiple valves 130, each valve 130 being correspondingly disposed at the opening of the feeding port 112, the discharge port 113, the cooling medium inlet 122, and the cooling medium outlet 123. The outlet end of each valve 130 is connected to the opening of the corresponding feeding port 112, the discharge port 113, the cooling medium inlet 122, and the cooling medium outlet 123, respectively. The opening and closing of the corresponding feeding port 112, the discharge port 113, the cooling medium inlet 122, and the cooling medium outlet 123 can be controlled through each valve 130.

[0027] As a preferred embodiment, please refer to Figure 2 and Figure 3The acid addition pipeline 210 includes an acid inlet pipe 211, a transfer pipe 212, a connecting pipe 213, and an acid outlet pipe 214. The acid inlet pipe 211 is vertically arranged and penetrates the top surface of the vessel body 110. The upper end of the acid inlet pipe 211 is connected to the acid storage tank. The transfer pipe 212 is vertically arranged inside the reaction chamber 111. A first opening 2121 and a second opening 2122 are provided on the side wall of the transfer pipe 212. One end of the connecting pipe 213 is connected to the acid inlet pipe 211. The other end of the connecting pipe 213 is connected to the first opening 2121. The acid outlet pipe 214 is disposed in the reaction chamber 111, and one end of the acid outlet pipe 214 is connected to the second opening 2122. The sealing member 220 is slidably disposed in the transfer pipe 212 and can reciprocate between the first position and the second position. When the sealing member 220 reaches the first position, the first opening 2121 and the second opening 2122 are connected. When the sealing member 220 reaches the first position, the first opening 2121 and the second opening 2122 are connected. When the first opening 2121 and the second opening 2122 are disconnected, the first opening 2121 and the second opening 2122 are disconnected. By manipulating the drive component 230, the drive component 230 can drive the sealing component 220 to move up and down, so that the sealing component 220 can move back and forth between the first position and the second position. When the sealing component 220 reaches the first position, the first opening 2121 and the second opening 2122 are connected, and the acid in the acid storage tank flows along the acid inlet pipe 211, the connecting pipe 213, the transfer pipe 212 and the acid outlet pipe 214 and enters the reaction chamber 111. When the sealing component 220 reaches the second position, the first opening 2121 and the second opening 2122 are disconnected, and the acid in the acid storage tank cannot flow along the acid inlet pipe 211, the connecting pipe 213, the transfer pipe 212 and the acid outlet pipe 214 and enter the reaction chamber 111, so that the acid can be intermittently added to the reaction chamber 111.

[0028] As a preferred embodiment, please refer to Figure 3 and Figure 4 The connecting pipe 213 is a bent pipe structure and has a first vertical section 2131 and a first horizontal section 2132. The upper end of the first vertical section 2131 is connected to the lower end of the acid inlet pipe 211, one end of the first horizontal section 2132 is connected to the lower end of the first vertical section 2131, and the other end of the first horizontal section 2132 is connected to the first opening 2121, so that the connecting pipe 213 can connect the acid inlet pipe 211 and the transfer pipe 212.

[0029] As a preferred embodiment, please refer to Figure 3 and Figure 4The acid outlet pipe 214 is a bent pipe structure and has a second horizontal section 2141 and a second vertical section 2142. One end of the second horizontal section 2141 is connected to the second opening 2122, and the upper end of the second vertical section 2142 is connected to the other end of the second horizontal section 2141, which facilitates the discharge of acid.

[0030] As a preferred embodiment, please refer to Figure 3 and Figure 4 The second opening 2122 is located above the first opening 2121. The sealing member 220 has a flow channel 221. When the sealing member 220 reaches the first position, the upper end of the flow channel 221 is connected to the first opening 2121, and the lower end of the flow channel 221 is connected to the second opening 2122. When the sealing member 220 reaches the second position, the sealing member 220 blocks the first opening 2121 and the second opening 2122, so that the single drip volume of acid is only the capacity of the flow channel 221, avoiding the problem of excessive single drip volume of acid and avoiding the problem of violent single reaction.

[0031] As a preferred embodiment, please refer to Figure 3 and Figure 4 The flow channel 221 has a curved structure, which facilitates the acid in the connecting pipe 213 to enter the acid outlet pipe 214 along the flow channel 221.

[0032] As a preferred embodiment, please refer to Figure 2 and Figure 3The lower end of the adapter pipe 212 is open, and the lower end of the sealing member 220 extends out of the adapter pipe 212 through the opening at the lower end of the adapter pipe 212. The driving assembly 230 includes a rotating wheel 231, a first rotating shaft 232, and a first rotation driving member 233. The rotating wheel 231 is disposed below the sealing member 220 and abuts against the bottom surface of the sealing member 220. The first rotating shaft 232 is horizontally arranged, with one end of the first rotating shaft 232 eccentrically fixedly connected to the rotating wheel 231, and the other end of the first rotating shaft 232 rotating through the vessel body 110 and extending out of the vessel body 110. The output end of the first rotation driving member 233 is connected to the other end of the first rotating shaft 232 for driving the first rotating shaft 232. The first rotating shaft 232 rotates around its axis, causing the rotating wheel 231 to push the sealing member 220 up and down. By manipulating the first rotating drive member 233, the first rotating drive member 233 can drive the first rotating shaft 232 to rotate around its axis, and drive the rotating wheel 231 to rotate. Since the rotating wheel 231 and the first rotating shaft 232 are eccentrically set, the farthest distance between the outer edge of the rotating wheel 231 and the first rotating shaft 232 is point a. During the rotation of the rotating wheel 231, when point a of the rotating wheel 231 gradually approaches the sealing member 220, the rotating wheel 231 will push the sealing member 220 to move upward. When point a of the rotating wheel 231 gradually moves away from the sealing member 220, the sealing member 220 will move downward under its own gravity.

[0033] As a preferred embodiment, please refer to Figure 2 and Figure 3 The driving component 230 further includes an elastic element 234, which is sleeved on the sealing element 220. The upper end of the elastic element 234 abuts against the lower end of the adapter pipe 212, and the lower end of the elastic element 234 abuts against the rotating wheel 231. During the rotation of the rotating wheel 231, when point a of the rotating wheel 231 gradually approaches the sealing element 220, the rotating wheel 231 will push the sealing element 220 to move upward. The elastic element 234 will gradually compress and accumulate compressive elastic potential energy. When point a of the rotating wheel 231 gradually moves away from the sealing element 220, on the one hand, the sealing element 220 will move downward under its own gravity, and on the other hand, the elastic element 234 will release the compressive elastic potential energy and push the sealing element 220 to move downward, thereby improving the reset effect of the sealing element 220.

[0034] As a preferred embodiment, please refer to Figure 3 The elastic element 234 is a spring, which can accumulate compressive elastic potential energy when compressed, and release the compressive elastic potential energy when the compressive force disappears.

[0035] As a preferred embodiment, please refer to Figure 2The acid precipitation reactor also includes a stirring mechanism 300, which is used to stir the solution in the reaction chamber 111 to accelerate the acid precipitation reaction.

[0036] As a preferred embodiment, please refer to Figure 2 The stirring mechanism 300 includes a second rotating shaft 310, a plurality of stirring blades 320, and a second rotation drive 330. The second rotating shaft 310 is vertically disposed in the reaction chamber 111, and the upper end of the second rotating shaft 310 is rotatably connected to the vessel body 110. Each of the stirring blades 320 is disposed in the reaction chamber 111 and is fixedly connected to the second rotating shaft 310. The output end of the second rotation drive 330 is connected to the upper end of the second rotating shaft 310 and is used to drive the second rotating shaft 310 to rotate around its axis. By operating the second rotation drive 330, the second rotation drive 330 will drive the second rotating shaft 310 to rotate around its axis, thereby driving each of the stirring blades 320 to rotate, so that each of the stirring blades 320 can stir the solution.

[0037] To better understand this utility model, the following is combined with... Figure 1 - Figure 4 The working principle of the technical solution of this utility model will be described in detail below:

[0038] In use, the solution is fed into the reaction chamber 111 through the feed port 112, and the diluted acid solution is placed into the acid storage tank. By operating the first rotation drive 233, the first rotation drive 233 can drive the first rotating shaft 232 to rotate around its axis, and drive the rotating wheel 231 to rotate. Since the rotating wheel 231 and the first rotating shaft 232 are eccentrically set, the farthest distance between the outer edge of the rotating wheel 231 and the first rotating shaft 232 is point a. During the rotation of the rotating wheel 231... As point a of the rotating wheel 231 gradually approaches the sealing member 220, the rotating wheel 231 pushes the sealing member 220 upward, and the elastic member 234 gradually compresses and accumulates compressive elastic potential energy. As point a of the rotating wheel 231 gradually moves away from the sealing member 220, on the one hand, the sealing member 220 will move downward under its own gravity, and on the other hand, the elastic member 234 will release compressive elastic potential energy and push the sealing member 220 downward. When the sealing member 220 reaches... In the first position, the upper end of the flow channel 221 is connected to the first opening 2121, and the lower end of the flow channel 221 is connected to the second opening 2122. The acid in the acid storage tank flows along the acid inlet pipe 211, the connecting pipe 213, the flow channel 221, and the acid outlet pipe 214 and enters the reaction chamber 111. When the sealing member 220 reaches the second position, the sealing member 220 seals the first opening 2121 and the second opening 2122, and the acid storage tank... The acid in the acid tank cannot flow through the acid inlet pipe 211, the connecting pipe 213, the flow channel 221, and the acid outlet pipe 214 into the reaction chamber 111. This allows for intermittent addition of acid to the reaction chamber 111. The solution after acid precipitation is discharged through the discharge port 113. By controlling the rotation speed of the first rotating drive component 233, the acid addition speed can be reasonably controlled to avoid violent reactions caused by excessive acid addition, thus ensuring the safety of the acid precipitation reaction.

[0039] The acid precipitation reactor provided by this utility model has the following beneficial effects:

[0040] (1) On the one hand, the sealing member 220 will move downward under its own gravity, and on the other hand, the elastic member 234 will release the compressive elastic potential energy and push the sealing member 220 downward, thereby improving the reset effect of the sealing member 220;

[0041] (2) When the sealing member 220 reaches the first position, the upper end of the flow channel 221 is connected to the first opening 2121 and the lower end of the flow channel 221 is connected to the second opening 2122. When the sealing member 220 reaches the second position, the sealing member 220 blocks the first opening 2121 and the second opening 2122, so that the single drip volume of acid is only the capacity of the flow channel 221, avoiding the problem of excessive single drip volume of acid and avoiding the problem of violent single reaction;

[0042] (3) By controlling the rotation speed of the first rotating drive 233, the acid addition speed can be reasonably controlled to avoid violent reactions caused by excessive acid addition, thereby ensuring the safety of the acid precipitation reaction.

[0043] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An acid precipitation reaction vessel, characterized in that, include: A reaction unit includes a vessel body having a reaction chamber, and the vessel body having a feed port and a discharge port that are connected to and can be closed in the reaction chamber; An acid-adding mechanism includes an acid storage tank, an acid-adding pipeline, a sealing element, and a driving assembly. The upper end of the acid-adding pipeline is connected to the acid storage tank, and the lower end of the acid-adding pipeline extends into the reaction chamber. The sealing element is disposed in the reaction chamber, and the driving assembly is connected to the sealing element to drive the sealing element to move so that the sealing element intermittently seals the lower end of the acid-adding pipeline.

2. The acid precipitation reactor according to claim 1, characterized in that, The reaction unit also includes a jacket, which covers the outer wall of the vessel body. A cooling cavity is formed between the inner wall of the jacket and the outer wall of the vessel body. The jacket has a cooling medium inlet and a cooling medium outlet that are connected to the cooling cavity and can be closed. The cooling medium inlet is also connected to the outlet end of the external cooling system, and the cooling medium outlet is also connected to the return end of the external cooling system.

3. The acid precipitation reactor according to claim 2, characterized in that, The acid addition pipeline includes an acid inlet pipe, a transfer pipe, a connecting pipe, and an acid outlet pipe. The acid inlet pipe is vertically arranged and penetrates the top surface of the reactor body. The upper end of the acid inlet pipe is connected to the acid storage tank. The transfer pipe is vertically arranged in the reaction chamber. A first opening and a second opening are provided on the side wall of the transfer pipe. One end of the connecting pipe is connected to the acid inlet pipe, and the other end of the connecting pipe is connected to the first opening. The acid outlet pipe is arranged in the reaction chamber, and one end of the acid outlet pipe is connected to the second opening. The sealing element is slidably arranged in the transfer pipe and can reciprocate between a first position and a second position. When the sealing element reaches the first position, the first opening and the second opening are connected. When the sealing element reaches the second position, the first opening and the second opening are disconnected.

4. The acid precipitation reactor according to claim 3, characterized in that, The connecting pipe is a bent pipe structure, and has a first vertical section and a first horizontal section. The upper end of the first vertical section is connected to the lower end of the acid inlet pipe, one end of the first horizontal section is connected to the lower end of the first vertical section, and the other end of the first horizontal section is connected to the first opening.

5. The acid precipitation reactor according to claim 3, characterized in that, The acid outlet pipe is a bent pipe structure with a second horizontal section and a second vertical section. One end of the second horizontal section is connected to the second opening, and the upper end of the second vertical section is connected to the other end of the second horizontal section.

6. The acid precipitation reactor according to claim 3, characterized in that, The second opening is located above the first opening. The sealing member has a flow channel. When the sealing member reaches the first position, the upper end of the flow channel is connected to the first opening, and the lower end of the flow channel is connected to the second opening. When the sealing member reaches the second position, the sealing member blocks the first opening and the second opening.

7. The acid precipitation reactor according to claim 6, characterized in that, The flow channel has a curved structure.

8. The acid precipitation reactor according to claim 3, characterized in that, The lower end of the adapter pipe is open, and the lower end of the sealing member extends out of the adapter pipe through the opening at the lower end of the adapter pipe. The driving assembly includes a rotating wheel, a first rotating shaft, and a first rotating drive member. The rotating wheel is located below the sealing member and abuts against the bottom surface of the sealing member. The first rotating shaft is horizontally arranged, with one end of the first rotating shaft eccentrically fixedly connected to the rotating wheel. The other end of the first rotating shaft rotates through the vessel body and extends out of the vessel body. The output end of the first rotating drive member is connected to the other end of the first rotating shaft and is used to drive the first rotating shaft to rotate around its axis, so that the rotating wheel pushes the sealing member to move up and down.

9. The acid precipitation reactor according to claim 8, characterized in that, The drive assembly also includes an elastic element, which is sleeved on the sealing element. The upper end of the elastic element abuts against the lower end of the adapter pipe, and the lower end of the elastic element abuts against the rotating wheel.

10. The acid precipitation reactor according to claim 9, characterized in that, The elastic element is a spring.

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