Chemical tail gas absorption treatment device

Abstract

The utility model relates to a chemical tail gas absorption treatment device which comprises a tower body and is technically characterized in that a horizontal support plate is arranged at the lower part of the tower body, a guide cylinder is arranged at the center of the lower surface of the horizontal support plate, an inner flow distribution cylinder and an outer flow distribution cylinder are arranged on the upper surface of the horizontal support plate, conical covers are respectively arranged at the upper ends of the inner flow distribution cylinder and the outer flow distribution cylinder, and overflowing hole groups are respectively arranged on the cylinder walls of the inner flow distribution cylinder and the outer flow distribution cylinder. The lower surface of the horizontal supporting plate is provided with a side flow guide pipe corresponding to the interior of the outer flow distribution cylinder, the horizontal supporting plate is provided with an overflow hole set on the outer side of the outer flow distribution cylinder, the lower portion of the side wall of the tower body is provided with an air inlet pipeline inserted into the flow guide cylinder, and the upper portion of the side wall of the tower body is provided with a composite liquid inlet pipeline. The inner end of an inner liquid inlet pipeline of the composite liquid inlet pipeline is inserted into the conical cover of the outer flow distribution cylinder and located over the conical cover of the inner flow distribution cylinder, and the inner end of an outer liquid inlet pipeline is located over the conical cover of the outer flow distribution cylinder. According to the device, on one hand, tail gas treatment blind areas are avoided, spraying liquid is saved, and on the other hand, a transmission part is not arranged in the tower body, so that the overhaul period is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a chemical tail gas absorption and treatment device. Background Technology

[0002] The treatment of exhaust gas has always been a key research topic in industries such as chemical engineering, as it directly affects the normal operation of production and has significant environmental impact. To achieve sustainable development, chemical exhaust gases are generally washed through absorption towers or packed towers to remove harmful substances such as H2S, SO2, and NH3.

[0003] For example, CN 220386188 U discloses a chemical tail gas absorption tower, which includes a tower body. An inlet pipe is fixedly installed on the outer side of the bottom of the tower body. A drive motor is fixedly installed on the top of the tower body. The output end of the drive motor is connected to a rotating shaft, which extends into the tower body and is fixedly connected to a first gear. An annular mounting seat is fixedly installed on the inner wall of the tower body. An annular rack is provided on the inner side of the annular mounting seat. A second gear is provided between the first gear and the annular mounting seat. The second gear meshes with both the first gear and the annular rack. An electric telescopic rod is fixedly installed on the second gear. A spray cylinder is fixedly connected to the piston rod end of the electric telescopic rod. Multiple nozzles are provided at the bottom of the spray cylinder, and a liquid inlet hose is connected to the spray cylinder. This absorption tower aims to achieve large-area spraying through a single spray cylinder, thus saving water resources. However, the following problems exist: 1. In fact, when the spray cylinder rotates around the shaft, some gas will bypass the spray liquid and rise directly, which creates a mobile blind zone in the spray treatment and affects the tail gas treatment effect; 2. The transmission structure inside the tower is prone to failure after long-term operation, which is not conducive to continuous production. Utility Model Content

[0004] The purpose of this invention is to provide a chemical tail gas absorption and treatment device with a reasonable structure and reliable operation that solves the above-mentioned problems. On the one hand, it avoids blind spots in tail gas treatment and saves spray liquid. On the other hand, compared with the prior art, it does not have transmission components in the tower body, thereby greatly extending the maintenance cycle and ensuring continuous production.

[0005] The technical solution of this utility model is:

[0006] A chemical tail gas absorption and treatment device includes a tower body. The key technical features are: a horizontal support plate is provided at the lower part of the tower body; a guide cylinder is provided at the center of the lower surface of the horizontal support plate; an inner distribution cylinder, concentric and connected to the guide cylinder, is provided on the upper surface of the horizontal support plate; an outer distribution cylinder, concentric with the inner distribution cylinder, is also provided on the upper surface of the horizontal support plate; conical caps are provided at the upper ends of the inner and outer distribution cylinders; flow-through hole groups are provided on the cylinder walls of the inner and outer distribution cylinders; and side guide pipes corresponding to the interior of the outer distribution cylinder are provided on the lower surface of the horizontal support plate. The support plate is provided with an overflow hole group on the outside of the outer flow distribution cylinder. The lower part of the tower body side wall is provided with an air inlet pipe inserted into the flow guide cylinder. The upper part of the tower body side wall is provided with a composite liquid inlet pipe. The composite liquid inlet pipe includes an inner liquid inlet pipe, an outer liquid inlet pipe concentric with the inner liquid inlet pipe, an end plate connecting the outer end of the outer liquid inlet pipe and the outer peripheral wall of the inner liquid inlet pipe, and a liquid inlet branch connected to the outer liquid inlet pipe. The inner end of the inner liquid inlet pipe is inserted into the conical cover of the outer flow distribution cylinder and is located directly above the conical cover of the inner flow distribution cylinder. The inner end of the outer liquid inlet pipe is located directly above the conical cover of the outer flow distribution cylinder.

[0007] In the aforementioned chemical tail gas absorption and treatment device, the outer end of the inner liquid inlet pipe and the liquid inlet branch are respectively connected to the main liquid inlet pipe. The main liquid inlet pipe is also provided with a side branch. The other end of the side branch is connected to the inlet of the booster pump. The bottom of the tower body is provided with a circulation port, and the outlet pipe of the booster pump is connected to the circulation port.

[0008] The aforementioned chemical tail gas absorption and treatment device has a spherical filter plate built into the top of the tower body. The spherical filter plate has a horizontal edge and is fixedly connected to the inner wall of the tower body. A liquid discharge hole is provided on the horizontal edge.

[0009] In the aforementioned chemical tail gas absorption and treatment device, a fixed-distance column is provided between the inner liquid inlet pipeline and the outer liquid inlet pipeline.

[0010] The aforementioned chemical tail gas absorption and treatment device has an exhaust port on the top surface of the tower body and a liquid discharge port on the bottom surface.

[0011] The beneficial effects of this utility model are:

[0012] 1. The treatment liquid is supplied to the top surface of the conical cover of the inner distribution cylinder via the inner inlet pipe of the composite liquid inlet pipeline, and simultaneously supplied to the top surface of the conical cover of the outer distribution cylinder via the outer inlet pipe. The conical cover evenly distributes the treatment liquid, causing it to flow uniformly down its outer surface. It then slides evenly onto the outer surfaces of both the inner and outer distribution cylinders, forming a double-layer water distribution. In this state, the exhaust gas rises through the inlet pipe and guide cylinder into the inner distribution cylinder, passes through the first layer of water distribution outside the flow hole group, enters the outer distribution cylinder, and then passes through the second layer of water distribution outside the flow hole group before reaching the tower body, achieving double washing. This invention avoids blind spots in exhaust gas treatment, and the structural design of the composite liquid inlet pipeline and the inner and outer distribution cylinders also achieves the goal of saving spray liquid.

[0013] 2. The tower body of this utility model has no transmission components, which greatly extends the maintenance cycle and ensures continuous production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Exhaust port, 2. Tower body, 3. Spherical filter plate, 4. Liquid inlet hole, 5. External liquid inlet pipe, 6. Internal liquid inlet pipe, 7. Spacing column, 8. External distribution cylinder, 9. Internal distribution cylinder, 10. Overflow hole group, 11. Air inlet pipe, 12. Liquid level, 13. Guide cylinder, 14. Liquid outlet, 15. Side guide pipe, 16. Horizontal support plate, 17. Circulation port, 18. Booster pump, 19. Side branch, 20. Conical cover, 21. Flow hole group, 22. Liquid inlet branch, 23. Main liquid inlet pipe, 24. End plate. Detailed Implementation

[0016] The present invention will be described in detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the chemical tail gas absorption and treatment device includes a tower body 2.

[0018] The tower body 2 has a horizontal support plate 16 at its lower part. A flow guide cylinder 13 is located at the center of the lower surface of the horizontal support plate 16. An inner flow distribution cylinder 9, concentric and connected to the flow guide cylinder 13, is located on the upper surface of the horizontal support plate 16. An outer flow distribution cylinder 8, concentric with the inner flow distribution cylinder 9, is also located on the upper surface of the horizontal support plate 16. Conical caps 20 are located at the upper ends of both the inner and outer flow distribution cylinders 9 and 8. Flow passage hole groups 21 are located on the walls of both the inner and outer flow distribution cylinders. A side flow guide pipe 15, corresponding to the interior of the outer flow distribution cylinder 8, is located on the lower surface of the horizontal support plate 16. An overflow hole group 10 is located on the outer side of the outer flow distribution cylinder 8.

[0019] The lower part of the side wall of the tower body 2 is provided with an air inlet pipe 11 that is inserted into the guide cylinder 13, and the upper part of the side wall of the tower body 2 is provided with a composite liquid inlet pipe. The composite liquid inlet pipe includes an inner liquid inlet pipe 6, an outer liquid inlet pipe 5 concentric with the inner liquid inlet pipe 6, an end plate 24 connecting the outer end of the outer liquid inlet pipe 5 and the outer peripheral wall of the inner liquid inlet pipe 5, and a liquid inlet branch 22 communicating with the outer liquid inlet pipe 5. The inner end of the inner liquid inlet pipe 6 is inserted into the conical cover of the outer distribution cylinder 8 and is located directly above the conical cover 20 of the inner distribution cylinder 9, and the inner end of the outer liquid inlet pipe 5 is located directly above the conical cover 20 of the outer distribution cylinder 8. In this embodiment, the outer end of the inner liquid inlet pipe 6 and the liquid inlet branch pipe 22 are respectively connected to the main liquid inlet pipe 23. The main liquid inlet pipe 23 is also provided with a side branch pipe 19, the other end of which is connected to the inlet of the booster pump 18. The bottom of the tower body 2 is provided with a circulation port 17, and the outlet pipe of the booster pump 18 is connected to the circulation port 17. A spacer column 7 is provided between the inner liquid inlet pipe 6 and the outer liquid inlet pipe 5.

[0020] In this embodiment, a spherical filter plate 3 is built into the top of the tower body 2. The spherical filter plate 3 has a horizontal edge and is connected and fixed to the inner wall of the tower body 2. A liquid discharge hole 4 is provided on the horizontal edge. An exhaust port 1 is provided on the top surface of the tower body 2, and a liquid discharge port 14 is provided on the bottom surface.

[0021] Working principle:

[0022] 1. The prepared treatment solution is sent to the inner inlet pipe 6 and the outer inlet pipe 5 through the main inlet pipe 23. The inner inlet pipe 6 delivers the treatment solution to the top surface of the conical cover 20 of the inner distribution cylinder 9, and the outer inlet pipe 5 delivers the treatment solution to the top surface of the conical cover 20 of the outer distribution cylinder 8. The conical cover 20 evenly distributes the treatment solution so that the treatment solution flows down evenly along its outer surface and slides evenly on the outer surfaces of the inner distribution cylinder 9 and the outer distribution cylinder 8, forming a double water distribution state.

[0023] 2. When the liquid level at the bottom of the tower body 2 is higher than the set height (the lower ends of the guide tube 13 and the side guide tube 15 are both submerged below the liquid level 12), the exhaust gas is introduced into the guide tube 13 through the air inlet pipe 11, and then rises from the guide tube 13 into the inner distribution tube 9. After passing through the first layer of water cloth outside the flow hole group 21 of the inner distribution tube 9, it enters the outer distribution tube 8, and then passes through the second layer of water cloth outside the flow hole group 21 of the outer distribution tube 8, and reaches the tower body 2, thus achieving double washing.

[0024] 3. After being washed, the gas flows towards the spherical filter plate 3 at the top of the tower body 2. The spherical filter plate 3 has a larger flow-blocking area than the flat plate, increasing the flow area. Liquid entrained in the gas is blocked on the lower surface of the spherical filter plate 3, while simultaneously flowing down as droplets. The liquid dripping from the top surface of the tower body 2 collects and falls at the lower liquid hole 4. Finally, the purified gas is discharged through the exhaust port 1.

[0025] 4. To save the treatment liquid, the booster pump 18 continuously sends the liquid accumulated at the bottom of the tower to the main inlet pipe 23, and then diverts it into the inner inlet pipe 6 and the outer inlet pipe 5 to achieve recycling. After the operation is completed, the treatment liquid is discharged through the drain port 14.

[0026] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A chemical tail gas absorption and treatment device, comprising a tower body, characterized in that: The lower part of the tower body is provided with a horizontal support plate. A flow guide cylinder is located at the center of the lower surface of the horizontal support plate. An inner flow distribution cylinder, concentric and connected to the flow guide cylinder, is located on the upper surface of the horizontal support plate. An outer flow distribution cylinder, concentric with the inner flow distribution cylinder, is also located on the upper surface of the horizontal support plate. Conical caps are respectively provided at the upper ends of the inner and outer flow distribution cylinders. Flow passage hole groups are respectively provided on the cylinder walls of the inner and outer flow distribution cylinders. A side flow guide pipe corresponding to the interior of the outer flow distribution cylinder is located on the lower surface of the horizontal support plate. The horizontal support plate is positioned outside the outer flow distribution cylinder. The tower body is equipped with an overflow hole group. The lower part of the side wall of the tower body is provided with an air inlet pipe inserted into the guide cylinder. The upper part of the side wall of the tower body is provided with a composite liquid inlet pipe. The composite liquid inlet pipe includes an inner liquid inlet pipe, an outer liquid inlet pipe concentric with the inner liquid inlet pipe, an end plate connecting the outer end of the outer liquid inlet pipe and the outer peripheral wall of the inner liquid inlet pipe, and a liquid inlet branch connected to the outer liquid inlet pipe. The inner end of the inner liquid inlet pipe is inserted into the conical cover of the outer flow distribution cylinder and is located directly above the conical cover of the inner flow distribution cylinder. The inner end of the outer liquid inlet pipe is located directly above the conical cover of the outer flow distribution cylinder.

2. The chemical tail gas absorption and treatment device according to claim 1, characterized in that: The outer end of the internal inlet pipe and the inlet branch are respectively connected to the main inlet pipe. The main inlet pipe is also provided with a side branch. The other end of the side branch is connected to the inlet of the booster pump. The bottom of the tower body is provided with a circulation port. The outlet pipe of the booster pump is connected to the circulation port.

3. The chemical tail gas absorption and treatment device according to claim 1, characterized in that: The top of the tower body is equipped with a spherical filter plate, which has a horizontal edge and is fixed to the inner wall of the tower body. The horizontal edge is provided with a liquid discharge hole.

4. The chemical tail gas absorption and treatment device according to claim 1, characterized in that: A spacer column is provided between the internal liquid inlet pipe and the external liquid inlet pipe.

5. The chemical tail gas absorption and treatment device according to claim 1, characterized in that: The tower body has an exhaust port on the top surface and a liquid drain port on the bottom surface.

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