Alkali washing tower for sulfonation reaction tail gas treatment

Abstract

The utility model relates to an alkaline washing tower for sulfonation reaction tail gas treatment, which comprises a tower body, and an inverted distributed gas inlet device, an alkaline washing spraying device, a clear water washing device and a wire mesh demisting device are sequentially arranged in the tower body from bottom to top, baffling liquid removal devices are arranged between the alkali washing spraying device and the clear water washing device and between the clear water washing device and the wire mesh demisting device, a rotary wall cleaning device is arranged at the bottom in the tower body, an exhaust port is formed in the top of the tower body, a liquid discharge port is formed in the bottom of the tower body, and a side discharge port is formed in the position, corresponding to the lower end of each baffling liquid removal device, of the side wall of the tower body. According to the utility model, the gas can be better distributed, the acid-base neutralization reaction can be better carried out, the multi-stage downcomer demisting device can prevent the gas from entraining liquid, the tail gas purification effect is better, the tower wall can be cleaned, and particle products are prevented from being adhered.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to an alkali washing tower for treating the tail gas of sulfonation reaction. Background Art

[0002] In the chemical industry, the tail gas after sulfonation reaction often carries acidic gases. If directly discharged, it will have an adverse impact on the environment and needs to be treated before discharge. The alkali washing tower is a common tail gas treatment device, which removes the acidic gas in the tail gas through acid-base neutralization reaction.

[0003] The existing alkali washing towers mostly adopt direct spraying treatment with alkali liquor. After the acid-base neutralization reaction, crystallization positions will inevitably be generated and adhered to the tower wall, which is not easy to clean after a long time. Moreover, when the gas is discharged, it will inevitably entrain alkali liquor, which not only causes waste but also affects the operation environment. Content of the Utility Model

[0004] The utility model aims to solve the deficiencies of the prior art and provides an alkali washing tower for treating the tail gas of sulfonation reaction.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] An alkali washing tower for treating the tail gas of sulfonation reaction includes a tower body. Inside the tower body, a reverse distributed air inlet device, an alkali washing spraying device, a clear water washing device, and a wire mesh demisting device are successively arranged from bottom to top. A baffle liquid removal device is arranged between the alkali washing spraying device and the clear water washing device, and between the clear water washing device and the wire mesh demisting device. A rotary wall cleaning device is arranged at the bottom inside the tower body. An exhaust port is arranged at the top of the tower body, a liquid discharge port is arranged at the bottom of the tower body, and a side discharge port is arranged on the side wall of the tower body corresponding to the lower end of each baffle liquid removal device.

[0007] The reverse distributed air inlet device includes a vertical air inlet main pipe installed at the central position of the bottom of the tower body. The top of the vertical air inlet main pipe is connected with a horizontal gas pipeline. A plurality of umbrella-shaped distributed air heads are evenly arranged on the top of the horizontal gas pipeline. A plurality of inclined downward air distribution holes are arranged on the bottom side wall of the umbrella-shaped distributed air heads.

[0008] The alkali washing spraying device includes an alkali liquor pipeline, and a plurality of alkali liquor spray heads are arranged at the bottom of the alkali liquor pipeline.

[0009] The clear water washing device includes a clear water pipeline, and a plurality of clear water spray heads are arranged at the bottom of the clear water pipeline.

[0010] The baffle liquid removal device includes a vertical cylinder arranged inside the tower body. An inclined downward ring plate is arranged between the bottom of the vertical cylinder and the inner wall of the tower body. An inclined downward outlet is arranged at the upper end of the side wall of the vertical cylinder. A plurality of inclined downward baffle plates are alternately arranged on the inner wall of the vertical cylinder from top to bottom.

[0011] The rotary wall cleaning device includes a hollow rotating shaft arranged at the middle position of the bottom of the tower body. The vertical intake main pipe passes through the hollow rotating shaft. An L-shaped wall cleaning scraper is provided on the side wall of the hollow rotating shaft extending into the tower body. The L-shaped wall cleaning scraper is arranged in contact with the inner wall and the bottom wall of the tower body. The outer wall of the hollow rotating shaft exposed at the bottom of the tower body is connected to the driving motor through a transmission chain.

[0012] The beneficial effects of the present utility model are as follows: The present utility model can better distribute the gas, better carry out the acid-base neutralization reaction. The multi-stage liquid dropping and demisting device can avoid the gas entraining liquid, and the tail gas purification effect is better. It can also clean the tower wall to avoid the adhesion of particulate products. Brief Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] In the figure: 1 - tower body; 2 - reverse distributed intake device; 3 - alkali washing spray device; 4 - clean water washing device; 5 - wire mesh demisting device; 6 - baffle liquid removal device; 7 - rotary wall cleaning device; 8 - exhaust port; 9 - liquid discharge port; 10 - side discharge port;

[0015] 21 - vertical intake main pipe; 22 - horizontal gas pipeline; 23 - umbrella-shaped distribution gas head; 24 - gas distribution holes; 25 - refined wire mesh;

[0016] 31 - alkali liquid pipeline; 32 - alkali liquid spray head;

[0017] 41 - clean water pipeline; 42 - clean water spray head;

[0018] 51 - support ring; 52 - demisting wire mesh;

[0019] 61 - vertical cylinder; 62 - ring plate; 63 - outlet; 64 - baffle plate; 65 - vertical baffle;

[0020] 71 - hollow rotating shaft; 72 - L-shaped wall cleaning scraper; 73 - transmission chain; 74 - driving motor;

[0021] The following will be described in detail with reference to the embodiments of the present utility model with reference to the drawings. Specific Embodiments

[0022] The principles and features of the present utility model will be described below with reference to the drawings. The examples given are only used to explain the present utility model and are not used to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the drawings. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0025] The following further describes this utility model in conjunction with the accompanying drawings and embodiments:

[0026] As Figure 1 shown, an alkali scrubbing tower for treating tail gas of sulfonation reaction includes a tower body 1, an inverted distributed air inlet device 2, an alkali scrubbing spray device 3, a clean water washing device 4, a wire mesh demisting device 5, a baffle liquid removal device 6, a rotary wall cleaning device 7, an exhaust port 8, a liquid discharge port 9 and a side discharge port 10.

[0027] An inverted distributed air inlet device 2, an alkali scrubbing spray device 3, a clean water washing device 4 and a wire mesh demisting device 5 are successively arranged in the tower body 1 from bottom to top. Baffle liquid removal devices 6 are arranged between the alkali scrubbing spray device 3 and the clean water washing device 4 and between the clean water washing device 4 and the wire mesh demisting device 5. A rotary wall cleaning device 7 is arranged at the bottom inside the tower body 1. An exhaust port 8 is arranged at the top of the tower body 1. A liquid discharge port 9 is arranged at the bottom of the tower body 1. A side discharge port 10 is arranged on the side wall of the tower body 1 corresponding to the lower end of each baffle liquid removal device 6.

[0028] The inverted distributed air inlet device 2 includes a vertical air inlet main pipe 21 installed at the central position of the bottom of the tower body 1. The top of the vertical air inlet main pipe 21 is connected to a horizontal gas pipeline 22. A plurality of umbrella-shaped distributed air heads 23 are evenly distributed on the top of the horizontal gas pipeline 22. A plurality of inclined downward air distribution holes 24 are arranged on the bottom side wall of the umbrella-shaped distributed air heads 23.

[0029] The inverted distributed air inlet device 2 can distribute the incoming gas so that it is discharged downward, prolonging the contact time of the gas with the alkali liquid and also preventing the liquid from flowing into the gas pipeline.

[0030] On the bottom side wall of the umbrella-shaped gas distribution head 23, a thin wire mesh 25 is covered outside the gas distribution hole 24. The thin wire mesh 25 can form a smaller gas volume, which is better for the neutralization reaction.

[0031] The alkali cleaning spray device 3 includes an alkali solution pipeline 31 , and a plurality of alkali solution spray heads 32 are provided at the bottom of the alkali solution pipeline 31 .

[0032] The clean water washing device 4 includes a clean water pipe 41 , and a plurality of clean water spray heads 42 are provided at the bottom of the clean water pipe 41 .

[0033] The wire mesh demisting device 5 comprises a support ring 51 provided on the inner wall of the tower body 1, and a demisting wire mesh 52 is mounted on the support ring 51. The demisting wire mesh 52 can demist the exhaust gas to avoid entrainment.

[0034] The baffled liquid removal device 6 includes a vertical cylinder 61 disposed within the tower body 1. A downward-sloping annular plate 62 is disposed between the bottom of the vertical cylinder 61 and the inner wall of the tower body 1. An outlet 63 is disposed at the upper end of the side wall of the vertical cylinder 61. Several downward-sloping baffles 64 are staggered from top to bottom along the inner wall of the vertical cylinder 61. Several vertical baffles 65 are disposed at the bottom of the annular plate 62.

[0035] The deflection and liquid removal device 6 can block both the alkali solution and the clean water, forming a first-level liquid removal process to avoid entrainment.

[0036] The rotary wall cleaning device 7 includes a hollow rotating shaft 71 arranged in the middle position of the bottom of the tower body 1. The vertical air intake manifold 21 passes through the hollow rotating shaft 71. An L-shaped wall cleaning scraper 72 is provided on the side wall of the hollow rotating shaft 71 extending into the tower body 1. The L-shaped wall cleaning scraper 72 is arranged to fit the inner wall and bottom wall of the tower body 1. The outer wall of the hollow rotating shaft 71 exposed from the bottom of the tower body 1 is connected to the drive motor 74 through a transmission chain 73.

[0037] The L-shaped wall cleaning scraper 72 of the rotary wall cleaning device 7 can scrape the tower wall cleaned with alkali solution to prevent the granular product from sticking to the wall.

[0038] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An alkali scrubbing tower for treating the tail gas of a sulfonation reaction, characterized in that, It includes a tower body (1), in which a reverse distributed air inlet device (2), an alkali washing spray device (3), a fresh water washing device (4) and a wire mesh demisting device (5) are successively arranged from bottom to top. A baffle liquid removal device (6) is arranged between the alkali washing spray device (3) and the fresh water washing device (4), and between the fresh water washing device (4) and the wire mesh demisting device (5). A rotary wall cleaning device (7) is arranged at the bottom inside the tower body (1), an exhaust port (8) is arranged at the top of the tower body (1), a liquid discharge port (9) is arranged at the bottom of the tower body (1), and a side discharge port (10) is arranged on the side wall of the tower body (1) corresponding to the lower end of each baffle liquid removal device (6).

2. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 1, characterized in that, The reverse distributed air inlet device (2) includes a vertical air inlet main pipe (21) installed at the center position of the bottom of the tower body (1). The top of the vertical air inlet main pipe (21) is connected with a horizontal gas pipeline (22), and a plurality of umbrella-shaped distributed air heads (23) are evenly distributed on the top of the horizontal gas pipeline (22). A plurality of inclined downward air distribution holes (24) are arranged on the bottom side wall of the umbrella-shaped distributed air heads (23).

3. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 2, wherein, A refined wire mesh (25) is covered outside the air distribution holes (24) on the bottom side wall of the umbrella-shaped distributed air heads (23).

4. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 3, wherein, The alkali washing spray device (3) includes an alkali liquid pipeline (31), and a plurality of alkali liquid spray heads (32) are arranged at the bottom of the alkali liquid pipeline (31).

5. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 4, characterized in that, The fresh water washing device (4) includes a fresh water pipeline (41), and a plurality of fresh water spray heads (42) are arranged at the bottom of the fresh water pipeline (41).

6. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 5, characterized in that, The wire mesh demisting device (5) includes a support ring (51) arranged on the inner wall of the tower body (1), and a demisting wire mesh (52) is installed on the support ring (51).

7. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 6, characterized in that, The baffle liquid removal device (6) includes a vertical cylinder (61) arranged inside the tower body (1). An inclined downward ring plate (62) is arranged between the bottom of the vertical cylinder (61) and the inner wall of the tower body (1). An inclined downward outlet (63) is arranged at the upper end of the side wall of the vertical cylinder (61), and a plurality of inclined downward baffle plates (64) are alternately arranged on the inner wall of the vertical cylinder (61) from top to bottom.

8. An alkali scrubbing tower for treating tail gas of sulfonation reaction according to claim 7, characterized in that, A plurality of vertical baffle plates (65) are arranged at the bottom of the ring plate (62).

9. The caustic scrubber for treating the tail gas of the sulfonation reaction according to claim 8, characterized in that, The rotary wall cleaning device (7) includes a hollow rotating shaft (71) arranged at the middle position of the bottom of the tower body (1). The vertical air inlet main pipe (21) passes through the hollow rotating shaft (71). An L-shaped wall cleaning scraper (72) is arranged on the side wall of the hollow rotating shaft (71) extending into the tower body (1). The L-shaped wall cleaning scraper (72) is arranged in contact with the inner wall and the bottom wall of the tower body (1). The outer wall of the hollow rotating shaft (71) exposed at the bottom of the tower body (1) is connected with a driving motor (74) through a transmission chain (73).

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