Tail gas spraying and absorbing device

Abstract

The utility model relates to a tail gas spraying and absorbing device which comprises a tower body, a partition plate is arranged in the tower body and divides the interior of the tower body into a filtering chamber and a washing chamber, a gas conveying pipe is further arranged at the top of the filtering chamber, extends upwards and is communicated with the interior of the washing chamber, and a demisting plate, a spraying assembly and a packing layer are sequentially arranged in the washing chamber. A water conveying pipe is arranged in the spraying assembly, one end of the water conveying pipe extends outwards and communicates with the water pump, and the other end of the water conveying pipe communicates with a water inlet of the spraying assembly. An air inlet pipe is arranged on the outer side wall of the filtering chamber; an exhaust pipe is arranged at the top of the washing chamber; tail gas is screened out in advance by adopting a cyclone dust removal structure, a large number of impurities in the tail gas are prevented from entering the tower body, the impurities in recycled liquid are less, and the spraying assembly can drive the whole spraying pipe to rotate by utilizing impact of water flow, so that the rotary spraying effect is achieved, and the spraying coverage area is enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of spray towers, and particularly relates to a tail gas spray absorption device. Background Art

[0002] The rapid development of the chemical industry has brought a leap to human civilization. At the same time, during the organic synthesis process, if the tail gas emitted is directly discharged into the atmosphere, the organic solvents entrained in the tail gas will pollute the surrounding environment. However, the tail gas also contains substances that can be reused. Removing some non-reusable gases and recovering the reusable substances can reduce costs and also reduce the emission rate. Therefore, a purification device is needed.

[0003] Currently, the commonly used purification device is a spray tower. Inside, water is mainly sprayed on the packing layer through a spray structure, and then a large number of water films are formed by structures such as Raschig rings or Pall rings inside the packing layer to capture the recoverable materials in the tail gas, achieving the purification effect. These recovered materials are mixed into the water and separately recovered and processed for use.

[0004] However, in the actual production process, the tail gas not only contains chemical agents but also a large amount of particulate impurities. If the tail gas is directly discharged into the spray tower, it is extremely easy for a large amount of impurities to adhere to the inside of the packing layer, thus affecting the subsequent formation of the water film and the quality of the recovered liquid. Summary of the Utility Model

[0005] Based on the above description, the utility model provides a tail gas spray absorption device to solve the drawback that after directly introducing the tail gas into the existing spray tower, a large amount of particulate impurities are easily adhered to the inside of the packing layer, affecting the subsequent formation of the water film and the quality of the recovered liquid.

[0006] The utility model is realized through the following technical solutions:

[0007] A tail gas spray absorption device includes a tower body. A partition is provided inside the tower body to divide the inside of the tower body into a filtration chamber and a water washing chamber. The top of the filtration chamber is also provided with an air delivery pipe, which extends upward and is communicated with the inside of the water washing chamber. Inside the water washing chamber, a demisting plate, a spray assembly, and a packing layer are arranged in sequence. An inside of the spray assembly is provided with a water delivery pipe. One end of the water delivery pipe extends outward and is communicated with a water pump, and the other end of the water delivery pipe is communicated with the water inlet of the spray assembly. An air inlet pipe is provided on the outer side wall of the filtration chamber, and an exhaust pipe is provided on the top of the water washing chamber.

[0008] Based on the above technical solutions, the utility model can also be improved as follows.

[0009] Further, the interior of the filtration chamber is arranged in a funnel shape. The intake pipe is arranged in an arc structure and is tangent to the outer wall of the filtration chamber. The bottom end of the delivery pipe extends downward into the filtration chamber and is lower than the connection between the intake pipe and the filtration chamber.

[0010] Further, a dust discharge port is provided at the bottom of the filtration chamber, and a dust hopper is connected to the bottom of the dust discharge port.

[0011] Further, the spraying assembly further includes auxiliary supports, a spraying pipe, and connecting seats. There are two sets of auxiliary supports arranged at intervals up and down. There are two connecting seats which are respectively fixedly connected at the centers of the two sets of auxiliary supports. One of the sets of auxiliary supports is hollow inside. The water delivery pipe is arranged inside the auxiliary support and one end of it is exactly communicated with the inside of the connecting seat. The two ends of the spraying pipe are vertically inserted into the inside of the connecting seat through ball bearings respectively. A number of nozzles are vertically arranged at intervals on the outer side wall of the spraying pipe.

[0012] Further, turbine blades are provided on the side wall of one end of the spraying pipe located inside the connecting seat. The nozzle of the water delivery pipe is exactly directed at the side wall of the turbine blade and drives the turbine blade to rotate.

[0013] Further, a number of the nozzles are all arranged obliquely downward, and the inclination angle of the nozzles gradually increases from top to bottom.

[0014] Further, a booster pump is provided on the water delivery pipe, and the booster pump is fixedly connected to the outer side wall of the tower body by a motor base through bolts.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0016] 1. Based on the existing spray tower, the present application is improved by presetting a filtration chamber at its bottom and adopting a cyclone dust removal structure to screen the tail gas in advance, avoiding a large amount of impurities in the tail gas from entering the tower body, so as to ensure the normal use of the packing layer inside the tower body, and the recovered liquid is relatively cleaner.

[0017] 2. The spraying assembly in the present application can drive the entire spraying pipe to rotate by using the impact of water flow, so as to achieve the effect of rotary spraying and expand the spraying coverage area. The whole structure does not need to arrange an additional power source and can be realized only by relying on the internal structure of the spraying assembly. It can not only avoid spraying dead corners, improve the recovery efficiency, but also reduce the modification difficulty of the tower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the tower body in this embodiment;

[0019] Figure 2 It is a schematic internal structural diagram of the tower body in this embodiment;

[0020] Figure 3 It is a schematic structural diagram of the spray assembly in this embodiment;

[0021] Figure 4 It is a schematic internal structural diagram of the connecting seat in this embodiment;

[0022] Figure 5 It is a schematic structural diagram of the centrifugal filtration principle of the filtration chamber in this embodiment;

[0023] Figure 6 It is a schematic structural diagram of the coverage range of the nozzle in this embodiment;

[0024] Among them: 1. Tower body; 11. Water washing chamber; 12. Filtration chamber; 13. Air delivery pipe; 14. Air inlet pipe; 15. Exhaust pipe; 16. Ash hopper; 2. Demisting plate; 3. Spray assembly; 31. Auxiliary support; 32. Spray pipe; 33. Connecting seat; 34. Water delivery pipe; 35. Turbine blade; 36. Booster pump; 37. Nozzle; 4. Packing layer; 5. Water pump. Specific implementation manners

[0025] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] Combined with Figure 1-6 As shown, a tail gas spray absorption device includes:

[0028] A tower body 1, the interior of the tower body 1 is divided into two spaces, a filtration chamber 12 and a water washing chamber 11, by a partition, and the filtration chamber 12 and the water washing chamber 11 are communicated through an air delivery pipe 13. An air inlet pipe 14 is provided on the bottom side wall of the tower body 1 to communicate it with the filtration chamber 12, and an exhaust pipe 15 is provided at the top of the tower body 1 to communicate it with the water washing chamber 11;

[0029] A demisting plate 2, which is arranged inside the water washing chamber 11 and is arranged close to the lower part of the exhaust pipe 15;

[0030] A spray assembly 3, which is arranged below the demisting plate 2 and is used to spray the recovery liquid inside the tower body 1;

[0031] The packing layer 4 is detachably and fixedly installed inside the tower body 1 and is arranged at the bottom of the spraying assembly 3 to cooperate with the recycled liquid to form a large number of water films, and then capture the recyclable materials in the tail gas.

[0032] Specifically; in the filtration chamber 12, the inner cavity is arranged in a funnel shape, and the inner surface is mirror-treated. The bottom end of the air delivery pipe 13 extends downward to be arranged below the connection part of the air inlet pipe 14 and the filtration chamber 12. Therefore, when the tail gas is input inside, the tail gas will be rotated and conveyed along the inclined inner wall of the filtration chamber 12. During the rotation process, a centrifugal force will be generated, so as to separate impurities such as solid particles in the waste gas. The gas after separation will be conveyed along the air delivery pipe 13 to the inside of the water washing chamber 11 for recovery treatment, while the separated impurities will be conveyed downward along the inner wall of the filtration chamber 12 and discharged through the ash discharge port at the bottom of the filtration chamber 12.

[0033] To facilitate the collection of these impurities, an ash hopper 16 should also be arranged at the bottom of the ash discharge port, and the staff only needs to clean it regularly.

[0034] The spraying assembly 3 is composed of an auxiliary support 31, a spraying pipe 32, a connecting seat 33 and a water delivery pipe 34. Among them, the auxiliary support 31 is arranged as a cross-shaped support and its ends are respectively detachably and fixedly connected to the inner wall of the water washing chamber 11, and there are two groups of auxiliary supports 31 arranged at intervals up and down. There are two connecting seats 33 and they are respectively arranged at the centers of the two groups of auxiliary supports 31. The spraying pipe 32 is vertically arranged between the two groups of auxiliary supports 31, and its two ends are respectively inserted into the centers of the two connecting seats 33, and a ball bearing is also arranged at the connection part. Through the ball bearing, the spraying pipe 32 can rotate flexibly. At the same time, in order to ensure the sealing performance, a sealing gasket should also be used to seal both sides of the ball bearing; a number of nozzles 37 are also arranged on the outer side wall of the spraying pipe 32.

[0035] In the above structure, for the convenience of disassembly and assembly of the cross-shaped auxiliary support 31, sliding grooves can be preset on the inner wall of the entire tower body 1, that is, four sliding grooves are arranged. The auxiliary support 31 extends downward along the sliding grooves and is riveted and fixed to the inner wall of the tower body 1 through a bolt structure.

[0036] The inside of the connecting seat 33 is hollow, and the inside of one of the metal rods in the auxiliary support 31 is also hollow and communicates with the connecting seat 33. The water delivery pipe 34 is arranged inside the metal rod of the auxiliary support 31, and one end of it is arranged towards the inside of the connecting seat 33, and the other end penetrates through the side wall of the tower body 1 and extends to the outside and is connected to the water pump 5; the water pump 5 should also be additionally connected to the inside of the water washing chamber 11 by using a water pipe, so that it can use the recycled liquid for circulating spraying.

[0037] In order to effectively utilize the water pressure to drive the rotation of the spray pipe 32, turbine blades 35 should be provided on the side wall of the spray pipe 32 extending into the inside of the connecting seat 33, and the port of the water delivery pipe 34 is just arranged facing the turbine blades 35. Therefore, the water under high pressure will impact the side wall of the turbine blades 35, causing it to rotate, thereby driving the entire spray pipe 32 to rotate. Then, the water will pour into the inside of the spray pipe 32 through the opening at the bottom of the spray pipe 32, realizing the function of rotary spraying to ensure complete coverage of the packing layer 4.

[0038] The nozzles 37 on the spray pipe 32 are all arranged obliquely downward, and the inclination angle of each nozzle 37 is different. From top to bottom, the inclination angle gradually increases. For example Figure 4 as shown.

[0039] To ensure that the water pressure can meet the usage requirements in the above structure, a booster pump 36 should be additionally provided on the side wall of the tower body 1 and connected to the water delivery pipe 34.

[0040] In the water washing chamber 11, the gas delivery pipe 13 should extend upward to a certain height to prevent the recovered liquid in the water washing chamber 11 from flowing back into the inside of the gas delivery pipe 13.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A tail gas spray absorption device, characterized in that: The tower body (1) comprises a partition plate provided inside the tower body (1) to divide the inside of the tower body (1) into a filter chamber (12) and a water washing chamber (11), wherein an air supply pipe (13) is also provided at the top of the filter chamber (12), the air supply pipe (13) extends upward and is connected to the inside of the water washing chamber (11), and a demisting plate (2), a spray assembly (3) and a packing layer (4) are arranged in sequence inside the water washing chamber (11), wherein a water supply pipe (34) is provided inside the spray assembly (3), one end of the water supply pipe (34) extends outward and is connected to a water pump (5), and the other end of the water supply pipe (34) is connected to the water inlet of the spray assembly (3); an air inlet pipe (14) is provided on the outer wall of the filter chamber (12), and an exhaust pipe (15) is provided at the top of the water washing chamber (11).

2. According to the tail gas spray absorption device described in claim 1, it is characterized in that: The interior of the filter chamber (12) is configured to be bucket-shaped, the air inlet pipe (14) is arranged in an arc-shaped structure and is tangent to the outer wall of the filter chamber (12), and the bottom end of the air delivery pipe (13) extends downward to the interior of the filter chamber (12) and is lower than the connection between the air inlet pipe (14) and the filter chamber (12).

3. According to the tail gas spray absorption device described in claim 2, it is characterized in that: The bottom of the filter chamber (12) is also provided with an ash discharge port, and the bottom of the ash discharge port is connected to an ash hopper (16).

4. The tail gas spray absorption device according to claim 1, characterized in that: The spray assembly (3) further comprises an auxiliary bracket (31), a spray pipe (32) and a connecting seat (33); the auxiliary bracket (31) is provided with two groups and arranged at intervals in the upper and lower parts; the connecting seat (33) is provided with two groups and is respectively located at the center of the two groups of auxiliary brackets (31) and fixedly connected; and one group of the auxiliary brackets (31) is hollow inside; the water pipe (34) is arranged inside the auxiliary bracket (31) and one end of the water pipe is exactly connected to the inside of the connecting seat (33); the two ends of the spray pipe (32) are respectively vertically inserted into the inside of the connecting seat (33) through ball bearings; and a plurality of spray heads (37) are also vertically arranged at intervals on the outer wall of the spray pipe (32).

5. The tail gas spray absorption device according to claim 4, characterized in that: A turbine blade (35) is provided on the side wall of one end of the spray pipe (32) located inside the connecting seat (33), and the pipe mouth of the water delivery pipe (34) is just facing the side wall of the turbine blade (35) and drives the turbine blade (35) to rotate.

6. The tail gas spray absorption device according to claim 5, characterized in that: The plurality of nozzles (37) are arranged to be tilted downward, and the tilt angle of the nozzles (37) gradually increases from top to bottom.

7. The tail gas spray absorption device according to claim 1, characterized in that: A booster pump (36) is also provided on the water delivery pipe (34), and the booster pump (36) is fixedly connected to the outer wall of the tower body (1) via a motor base and bolts.

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