Tail gas purification device in phenothiazine preparation process

Abstract

The utility model relates to the technical field of tail gas purification devices, in particular to a tail gas purification device in a phenothiazine preparation process, which comprises a spray tower, a filter plate for blocking solid particles is arranged in a gas inlet pipe, a sampling mechanism comprises an opening, a connecting pipe and a closed pipe, and phenothiazine preparation tail gas containing the solid particles enters the spray tower through the gas inlet pipe and enters the spray tower through the connecting pipe. When tail gas in the gas inlet pipe needs to be sampled, the connection between the nut and the threaded rod is removed, the closed pipe is pulled to remove the connection between the closed pipe and the connecting pipe, the connecting pipe is opened, and the tail gas in the gas inlet pipe can be sampled. Tail gas enters the connecting pipe from the gas inlet pipe through the opening, then the collecting device can be used for sampling, sampling can be carried out without detaching the connection between the gas inlet pipe and other pipelines, the sampling difficulty and complexity are reduced, a worker can conveniently adjust the adding condition of materials in the spray tower, and then the purification efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of purification device technology, and in particular to a tail gas purification device for the preparation process of phenothiazine. Background Technology

[0002] The tail gas purification device for the phenothiazine preparation process is used to treat the tail gas generated during the phenothiazine production process, in order to reduce pollutant emissions, protect the environment, and ensure production safety. One type is a spray purification tower, which has the following structure:

[0003] 1. Spray tower: The spray tower provides space for the exhaust gas purification reaction, allowing the exhaust gas and the purification liquid to fully contact and mix;

[0004] 2. Inlet and outlet pipes: Inlet pipe: The inlet pipe guides the exhaust gas containing pollutants into the spray tower smoothly, and the outlet pipe is responsible for discharging the gas purified by the spray tower.

[0005] 3. Water tank: The water tank is a container for storing the purification liquid, which provides a continuous supply of purification liquid for the spray system.

[0006] To sample the exhaust gas in the intake pipe, the connection between the intake pipe and the pipeline needs to be disassembled. The operation is cumbersome and complicated, making it difficult for staff to keep track of changes in the composition and concentration of pollutants in the exhaust gas in a timely manner. It is also difficult to accurately adjust the amount of material added to the spray tower according to the actual situation, resulting in reduced purification efficiency. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a tail gas purification device for the preparation process of phenothiazine. It solves the technical problem that sampling the tail gas in the inlet pipe requires disassembling the connection between the inlet pipe and the pipeline, which is a cumbersome and complicated operation process. This makes it difficult for staff to keep track of changes in the composition and concentration of pollutants in the tail gas in a timely manner, and makes it difficult to accurately adjust the amount of material added in the spray tower according to the actual situation, resulting in reduced purification efficiency.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A tail gas purification device for the preparation of phenothiazine includes a spray tower. An air inlet pipe is fixedly installed on the outside of the spray tower. A filter plate for blocking solid particles is installed inside the air inlet pipe. A sampling mechanism for sampling is installed outside the air inlet pipe. The sampling mechanism includes an opening, a connecting pipe, and a closing pipe. The opening is located outside the air inlet pipe and communicates with the inside of the air inlet pipe. One end of the connecting pipe is fixedly installed inside the opening. The closing pipe is snapped into the inside of the connecting pipe and is used to close the closing pipe. Threaded rods are fixedly installed at both ends of the connecting pipe. The two ends of the closing pipe are slidably connected to the outside of the two threaded rods respectively. A nut for preventing the movement of the closing pipe is threaded onto the outside of each threaded rod.

[0010] Preferably, a sealing gasket is provided on the outside of the closed tube, and an annular groove is formed at the beginning of the closed tube. The sealing gasket is fitted inside the annular groove to fill the gap between the closed tube and the connecting tube.

[0011] Preferably, both ends of the intake pipe are provided with fixing mechanisms for installing filter plates. Each fixing mechanism includes a mounting bracket and a baffle. The mounting bracket is fixedly installed inside the intake pipe. Both ends of the filter plate are slidably connected to the outside of the two mounting brackets. The baffle is set outside the mounting bracket and is used to limit the movement range of the filter plate. Each mounting bracket has a threaded hole on its outside. The end of the baffle is threadedly connected to the inside of the threaded hole.

[0012] Preferably, each mounting bracket is movably fitted with a spring for resetting the filter plate, and each spring has a ring fixedly connected to both ends, with each ring slidably connected to the outside of the mounting bracket.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The tail gas from the preparation of phenothiazine containing solid particles enters the spray tower through the inlet pipe. The filter plate inside the inlet pipe will block the solid particles, preventing them from clogging the internal structure of the spray tower or affecting subsequent purification reactions. When it is necessary to sample the tail gas in the inlet pipe, the connection between the nut and the threaded rod is released. At this time, the connection between the sealing pipe and the connecting pipe can be released by pulling the sealing pipe. The connecting pipe opens, and the tail gas enters the connecting pipe through the opening in the inlet pipe. Then, the collection device can be used for sampling. Sampling can be carried out without disassembling the connection between the inlet pipe and other pipes, which reduces the difficulty and complexity of sampling and makes it easier for staff to adjust the addition of materials in the spray tower, thereby ensuring purification efficiency.

[0015] Second, when the exhaust gas comes into contact with the filter plate, when the gas flow rate is high, the gas pushes the filter plate to slide outside the mounting bracket. At this time, the spring is compressed. When the gas flow rate is low, the spring pushes the filter plate to reset. During the repeated movement of the filter plate, the solid particles attached to its surface are detached from the surface of the filter plate due to the external force of inertia, thus avoiding the filter plate from clogging and affecting the filtration effect. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This utility model Figure 1 Exploded view of the central air intake pipe;

[0019] Figure 3 This utility model Figure 2 Cross-sectional view of the central air intake manifold;

[0020] Figure 4 This utility model Figure 2 Structural diagram of a closed-loop tube;

[0021] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Legend: 1. Spray tower; 2. Air inlet pipe; 3. Filter plate; 4. Opening; 5. Connecting pipe; 6. Sealing pipe; 7. Threaded rod; 8. Nut; 9. Sealing gasket; 10. Annular groove; 11. Mounting bracket; 12. Baffle; 13. Threaded hole; 14. Spring; 15. Ring. Detailed Implementation

[0023] This application provides a tail gas purification device for the preparation process of phenothiazine, which effectively solves the technical problem that sampling the tail gas in the inlet pipe requires disassembling the connection between the inlet pipe and the pipeline, which is a cumbersome and complicated operation process. This makes it difficult for staff to keep track of changes in the composition and concentration of pollutants in the tail gas in a timely manner, and makes it difficult to accurately adjust the amount of material added in the spray tower according to the actual situation, resulting in reduced purification efficiency.

[0024] Example

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the technical solution in this application embodiment effectively solves the technical problem that sampling the exhaust gas in the intake pipe requires disassembling the connection between the intake pipe and the pipeline, which is a cumbersome and complicated process. This makes it difficult for staff to keep track of changes in the composition and concentration of pollutants in the exhaust gas in a timely manner, and makes it difficult to accurately adjust the amount of material added in the spray tower according to the actual situation, resulting in reduced purification efficiency. The overall idea is as follows:

[0026] To address the problems existing in the prior art, this utility model provides a tail gas purification device for the preparation process of phenothiazine, including a spray tower 1. An air inlet pipe 2 is fixedly installed on the outside of the spray tower 1. A filter plate 3 for blocking solid particles is set inside the air inlet pipe 2. A sampling mechanism for sampling is set outside the air inlet pipe 2. The sampling mechanism includes an opening 4, a connecting pipe 5, and a closing pipe 6. The opening 4 is opened on the outside of the air inlet pipe 2 and communicates with the inside of the air inlet pipe 2. One end of the connecting pipe 5 is fixedly installed inside the opening 4. The closing pipe 6 is snapped into the inside of the connecting pipe 5 and used to close the closing pipe 6. Threaded rods 7 are fixedly installed on both ends of the connecting pipe 5. The two ends of the closing pipe 6 are slidably connected to the outside of the two threaded rods 7 respectively. A nut 8 for preventing the movement of the closing pipe 6 is threadedly connected to the outside of each threaded rod 7.

[0027] A sealing gasket 9 is provided on the outside of the closed tube 6, and an annular groove 10 is formed on the outside of the closed tube 6. The sealing gasket 9 is fitted inside the annular groove 10.

[0028] Both ends of the air intake pipe 2 are provided with fixing mechanisms for installing filter plates 3. Each fixing mechanism includes a mounting bracket 11 and a baffle 12. The mounting bracket 11 is fixedly installed inside the air intake pipe 2. The mounting bracket 11 is composed of a cuboid plate and a shaft. The two ends of the filter plate 3 are slidably connected to the outside of the two mounting brackets 11 respectively. The baffle 12 is set outside the mounting bracket 11 and is used to limit the movement range of the filter plate 3.

[0029] Each mounting bracket 11 has a threaded hole 13 on its exterior, and the end of the baffle 12 is threaded into the interior of the threaded hole 13.

[0030] Each mounting bracket 11 is movably fitted with a spring 14 for resetting the filter plate 3. Each spring 14 has a ring 15 fixedly connected to both ends, and each ring 15 is slidably connected to the outside of the mounting bracket 11.

[0031] Filter plate 3: intercepts solid particles in the exhaust gas. When the exhaust gas passes through the inlet pipe 2, the solid particles cannot pass through the pores of the filter plate 3, thus preventing the solid particles from entering the interior of the spray tower 1, avoiding blockage of the internal structure of the spray tower 1, and ensuring the normal operation of the spray tower 1.

[0032] Sampling mechanism: Opening 4 provides a channel for exhaust gas sampling, connecting pipe 5 is used to guide exhaust gas from the intake pipe 2 to the outside of the intake pipe 2, and sealing pipe 6 is snapped into the inside of connecting pipe 5 to control the opening and closing of connecting pipe 5.

[0033] Threaded rod 7 and nut 8: Prevent movement of the closed pipe 6 and prevent exhaust gas leakage;

[0034] Sealing gasket 9 and annular groove 10: When the closed tube 6 is inserted into the connecting tube 5, the sealing gasket 9 is squeezed and deformed, filling the gap between the closed tube 6 and the connecting tube 5 to form a sealing structure, preventing exhaust gas from leaking out when not sampling.

[0035] Fixing mechanism: The mounting bracket 11 provides a sliding track for the filter plate 3, and the baffle 12 is used to limit the movement range of the filter plate 3. At the same time, the threaded hole 13 is threaded with the end of the baffle 12 to realize the detachable installation of the baffle 12 and facilitate the disassembly and assembly of the filter plate 3.

[0036] Spring 14: It is the restoring force of filter plate 3. Under the action of the gas flow rate change and the spring 14, the solid particles attached to the surface of filter plate 3 are subjected to the external force of inertia and fall off the surface of filter plate 3.

[0037] Working principle:

[0038] In the first step, the tail gas from the preparation of phenothiazine containing solid particles enters the spray tower 1 through the inlet pipe 2. The filter plate 3 inside the inlet pipe 2 blocks the solid particles. When the tail gas passes through, the solid particles are trapped because they cannot pass through the pores of the filter plate 3, thus initially purifying the tail gas and preventing solid particles from clogging the internal structure of the spray tower 1 or affecting subsequent purification reactions. When it is necessary to sample the tail gas in the inlet pipe 2, turn the nut 8 to disengage the connection between the nut 8 and the threaded rod 7. At this time, the connection between the sealing pipe 6 and the connecting pipe 5 can be pulled to disengage, and the connecting pipe 5 is opened. The tail gas enters the connecting pipe 5 from the inlet pipe 2 through the opening 4, and then the collection device can be used for sampling. After the sampling is completed, the sealing pipe 6 is re-clamped inside the connecting pipe 5, and then the nut 8 is connected to the threaded rod 7. The nut 8 prevents the sealing pipe 6 from moving, thus closing the connecting pipe 5.

[0039] In the second step, when the exhaust gas comes into contact with the filter plate 3, when the gas flow rate is high, the gas pushes the filter plate 3 to slide outside the mounting bracket 11. At this time, the spring 14 is compressed. When the gas flow rate is low, the spring 14 pushes the filter plate 3 to reset. During the repeated movement of the filter plate 3, the solid particles attached to its surface fall off the surface of the filter plate 3 due to the external force of inertia.

[0040] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A tail gas purification device for the preparation of phenothiazine, comprising a spray tower (1), wherein an air inlet pipe (2) is fixedly installed on the outside of the spray tower (1), characterized in that, The air inlet pipe (2) is provided with a filter plate (3) to block solid particles inside, and a sampling mechanism for sampling is provided outside the air inlet pipe (2). The sampling mechanism includes an opening (4), a connecting pipe (5) and a closing pipe (6). An opening (4) is opened on the outside of the air intake pipe (2), and the opening (4) communicates with the inside of the air intake pipe (2). One end of the connecting pipe (5) is fixedly installed inside the opening (4), and the sealing pipe (6) is snapped into the inside of the connecting pipe (5) and used to close the sealing pipe (6). Both ends of the connecting pipe (5) are fixedly installed with threaded rods (7), and both ends of the sealing pipe (6) are slidably connected to the outside of the two threaded rods (7). Each threaded rod (7) is threaded with a nut (8) to prevent the sealing pipe (6) from moving.

2. The tail gas purification device for the preparation process of phenothiazine as described in claim 1, characterized in that, The sealed tube (6) is provided with a sealing gasket (9) on the outside, and an annular groove (10) is formed on the outside of the sealed tube (6); The sealing gasket (9) is fitted inside the annular groove (10).

3. The tail gas purification device for the phenothiazine preparation process as described in claim 1, characterized in that, Both ends of the air intake pipe (2) are provided with fixing mechanisms for installing filter plates (3), and each fixing mechanism includes a mounting bracket (11) and a baffle (12). The mounting bracket (11) is fixedly installed inside the air intake pipe (2), the two ends of the filter plate (3) are slidably connected to the outside of the two mounting brackets (11), and the baffle (12) is set outside the mounting bracket (11) and used to limit the movement range of the filter plate (3).

4. The tail gas purification device for the preparation process of phenothiazine as described in claim 3, characterized in that, Each of the mounting brackets (11) has a threaded hole (13) on its exterior; The end of the baffle (12) is threaded into the inside of the threaded hole (13).

5. The tail gas purification device for the preparation process of phenothiazine as described in claim 3, characterized in that, Each of the mounting brackets (11) is externally fitted with a spring (14) for resetting the filter plate (3).

6. The tail gas purification device for the preparation process of phenothiazine as described in claim 5, characterized in that, Each of the springs (14) has a ring (15) fixedly connected to both ends; Each ring (15) is slidably connected to the outside of the mounting bracket (11).

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