CN218636970U

CN218636970U - A back end tail gas treatment ammonia recovery system for synthesizing o chlorobenzene nitrile

Info

Publication number: CN218636970U
Application number: CN202222871462.3U
Authority: CN
Inventors: 许伟文; 倪丹平
Original assignee: Anhui Hengsheng Chemical Co ltd
Current assignee: Anhui Hengsheng Chemical Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-17
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to an ortho-chlorobenzonitrile synthesis technical field discloses a back end tail gas treatment ammonia recovery system for synthesizing ortho-chlorobenzonitrile, and it includes that one-level spray column, second grade spray column, one-level spray cooler, second grade spray cooler, one-level spray recovery jar and second grade spray recovery jar, one-level spray column and second grade spray column include that shaft, waste gas discharge pipe, fluid-discharge tube and shower, the inside of shaft is from last to being fixed with first mesh baffle, second mesh baffle, third mesh baffle and fourth mesh baffle down, is connected with two on the shower and sprays branch. The utility model discloses a filler is clearly drawn the mouth and can be taken out filler, and the rotating electrical machines can drive vertical scraper blade and rotate on the top of second mesh baffle and fourth mesh baffle to can promote the filler removal on second mesh baffle and fourth mesh baffle top, make filler can remove to be close to the filler and clearly draw the position of mouth, thereby can be convenient clearly draw filler.

Description

A back end tail gas treatment ammonia recovery system for synthesizing o chlorobenzene nitrile

Technical Field

The utility model relates to an adjacent chlorobenzene nitrile synthesis technical field especially relates to a back end tail gas treatment ammonia recovery system for synthesizing adjacent chlorobenzene nitrile.

Background

The molecular formula of the o-chlorobenzonitrile is as follows: c ₇ H ₄ ClN is an important organic synthesis intermediate, is mainly used for synthesizing an intermediate 2-cyano-4-nitroaniline, is used for synthesizing a new antimalarial drug, namely nitroquine, and various anti-inflammatory and bactericidal drugs in the medical industry, and is used for preparing non-peptide angiotensin and the like. It can also be used for preparing important carbon steel corrosion inhibitors and the like.

Contain more ammonia in the back end tail gas among the o-chlorobenzonitrile synthesis technology, can not directly discharge, the ammonia that needs in to the tail gas absorbs the processing, generally absorb the ammonia through the spray column among the prior art, spray column among the prior art mainly adopts stainless steel orifice plate filler, this kind of filler has the great problem of volume, unable convenient installation and change are washd, and because there is solid impurity in the used ammonia absorption liquid repeatedly, solid impurity can plug up the shower head, thereby influence the spraying effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a back end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile has solved the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a back end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile, includes one-level spray column, second grade spray column, one-level spray cooler, second grade spray cooler, one-level sprays recovery tank and second grade and sprays recovery tank, one-level spray column and second grade spray column include that body of the tower, waste gas discharge pipe, fluid-discharge tube and shower, the inside of body of the tower is from last to being fixed with first mesh baffle, second mesh baffle, third mesh baffle and fourth mesh baffle down, are connected with two on the shower and spray branch, and one of them sprays branch and extends to the inside top of first mesh baffle of body of the tower, and another sprays branch and extends to between the inside second mesh baffle of body of the tower and the third mesh baffle, and spray and branch and install the spray thrower, and the inside pivot of installing vertical setting through the support rotation that rotates of body of the tower, and the pivot is driven through the rotating electrical machines, and vertical scraper blade is installed in the outside of pivot, is equipped with filler interpolation mouth and filler clearly draws the mouth on the lateral wall of body of the tower.

Preferably, the rotating motor is fixed on the outer wall of the tower body, an output shaft of the rotating motor extends into the tower body and is fixed with a driving bevel gear, a driven bevel gear is fixed at the bottom end of the rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

Preferably, the second mesh partition plate and the fourth mesh partition plate are used for supporting filler, two vertical scrapers are arranged, one vertical scraper is located between the first mesh partition plate and the second mesh partition plate, and the other vertical scraper is located between the third mesh partition plate and the fourth mesh partition plate.

Preferably, the waste gas discharge pipe is fixed at the top end of the tower body, and the waste gas discharge pipe is fixed at the position, close to the bottom end, of the side wall of the tower body.

Preferably, the bottom end liquid discharge pipes of the primary spray tower and the secondary spray tower are respectively and correspondingly communicated with the primary spray recovery tank and the secondary spray recovery tank.

Preferably, the outer side of the rotating shaft is further fixed with two dredging brushes which are respectively and correspondingly positioned below the two sprayers, and the top ends of the dredging brushes are in contact with the bottom ends of the sprayers.

The utility model has the advantages that:

1. the filler is a spherical filler made of polypropylene, the filler can be taken out through the filler clearing port, the rotating motor can rotate from the outside of the tower body and the rotating shaft, and when the rotating shaft rotates, the rotating motor can drive the vertical scraper to rotate at the top ends of the second mesh partition plate and the fourth mesh partition plate, so that the filler at the top ends of the second mesh partition plate and the fourth mesh partition plate can be pushed to move, the filler can move to a position close to the filler clearing port, and the filler can be conveniently cleared;

2. when the rotating shaft rotates, the dredging brush can be driven to move relative to the sprayer, so that the sprayer is scrubbed, and the sprayer can be dredged.

Drawings

FIG. 1 is a flow chart of a rear section tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile provided by the utility model.

FIG. 2 is a detailed tower diagram of a rear-end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile.

FIG. 3 is a detail view inside the tower body of the rear-end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile provided by the utility model.

FIG. 4 is a detail view inside the tower body of the rear section tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile provided by the utility model.

Fig. 5 is an enlarged schematic view of the position a in fig. 4 of a rear-end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile provided by the utility model.

Reference numbers in the figures: 1. a first stage spray tower; 2. a secondary spray tower; 3. a primary spray cooler; 4. a secondary spray cooler; 5. a primary spray recovery tank; 6. a secondary spray recovery tank; 7. a tower body; 8. an exhaust gas inlet pipe; 9. an exhaust gas discharge pipe; 10. a spray pipe; 11. a liquid discharge pipe; 12. spraying branches; 13. a sprayer; 14. a first mesh baffle; 15. a second mesh baffle; 16. filling a clearing opening; 17. a third mesh baffle; 18. a fourth mesh partition; 19. a rotating shaft; 20. a driven bevel gear; 21. a rotating electric machine; 22. a drive bevel gear; 23. a vertical squeegee; 24. dredging brushes; 25. a filler addition port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-5, a rear-end tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile comprises a first-stage spray tower 1, a second-stage spray tower 2, a first-stage spray cooler 3, a second-stage spray cooler 4, a first-stage spray recovery tank 5 and a second-stage spray recovery tank 6, wherein the first-stage spray tower 1 and the second-stage spray tower 2 comprise a tower body 7, a waste gas discharge pipe 8, a waste gas discharge pipe 9, a liquid discharge pipe 11 and a spray pipe 10, a first mesh partition 14, a second mesh partition 15, a third mesh partition 17 and a fourth mesh partition 18 are fixed in the tower body 7 from top to bottom, the spray pipe 10 is connected with two spray branches 12, one spray branch 12 extends to the upper part of the first mesh partition 14 in the tower body 7, the other spray branch 12 extends to the position between the second mesh partition 15 and the third mesh partition 17 in the tower body 7, a sprayer 13 is arranged on the spray branch 12, the tower body 7 is internally provided with a vertically arranged rotating shaft 19 in a rotating manner through a support, the rotating shaft 19 is driven by a rotating motor 21, the outer side of the rotating shaft 19 is provided with a vertical scraper 23, the side wall of the tower body 7 is provided with a filler adding port 25 and a filler cleaning port 16, the filler adding port 25 is used for adding filler to the inside of the tower body 7, a second mesh partition plate 15 and a fourth mesh partition plate 18 are used for supporting the filler, the filler is polypropylene spherical filler, the filler has large specific surface area and void ratio, the contact rate between waste gas and spray liquid can be improved, the ammonia absorption effect is improved, the filler can be taken out through the filler cleaning port 16, so that the filler is convenient to replace, ammonia-containing waste gas enters the tower body 7 through a waste gas discharging pipe 8 during work, the ammonia-containing waste gas moves from top to bottom, absorption liquid enters the tower body 7 through a spray pipe 10, the absorption liquid moves from top to bottom, the absorption liquid and the ammonia-containing waste gas can absorb ammonia in the waste gas, the waste gas discharge pipe 9 is fixed at the top end of the tower body 7, the waste gas discharge pipe 8 is fixed at the position, close to the bottom end, of the side wall of the tower body 7, the waste gas is finally discharged through the waste gas discharge pipe 9, and the absorption liquid is finally discharged through the liquid discharge pipe 11.

Wherein, rotating electrical machines 21 fixes on the outer wall of body of the tower 7, and rotating electrical machines 21's output shaft extends to the inside of body of the tower 7 and is fixed with drive bevel gear 22, and the bottom mounting of pivot 19 has driven bevel gear 20, and drive bevel gear 22 meshes with driven bevel gear 20, can drive bevel gear 22 through rotating electrical machines 21 and rotate, and then drive pivot 19 through drive bevel gear 22 and driven bevel gear 20 meshing and rotate, and rotating electrical machines 21 can follow the outside of body of the tower 7 and pivot 19 rotates.

Wherein, vertical scraper blade 23 is equipped with two, and one of them vertical scraper blade 23 is located between first mesh baffle 14 and the second mesh baffle 15, and another vertical scraper blade 23 is located between third mesh baffle 17 and the fourth mesh baffle 18, can drive vertical scraper blade 23 when pivot 19 rotates and rotate on the top of second mesh baffle 15 and fourth mesh baffle 18 to can promote the filler removal on second mesh baffle 15 and the fourth mesh baffle 18 top, make the filler can remove to the position that is close to filler clearly draw mouthful 16, thereby can convenient clearly draw the filler.

Wherein, the liquid-discharge tube 11 of the bottom ends of the first-level spray tower 1 and the second-level spray tower 2 is respectively communicated with the first-level spray recovery tank 5 and the second-level spray recovery tank 6, the absorption liquid flowing out of the bottom ends of the first-level spray tower 1 and the second-level spray tower 2 can flow back to the first-level spray recovery tank 5 and the second-level spray recovery tank 6 for recycling, and then is pumped out by the water pump to be reused after being cooled by the first-level spray cooler 3 and the second-level spray cooler 4, and finally, the saturated ammonia is pumped to the ammonia still.

In order to prevent impurities in the absorption liquid used circularly from blocking the spraying holes of the sprayer 13, two dredging brushes 24 are further fixed on the outer side of the rotating shaft 19, the two dredging brushes 24 are respectively and correspondingly located below the two sprayers 13, the top ends of the dredging brushes 24 are in contact with the bottom ends of the sprayers 13, and when the rotating shaft 19 rotates, the dredging brushes 24 can be driven to move relative to the sprayers 13, so that the sprayers 13 are scrubbed, and the sprayers 13 can be dredged.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A rear-section tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile comprises a first-stage spray tower (1), a second-stage spray tower (2), a first-stage spray cooler (3), a second-stage spray cooler (4), a first-stage spray recovery tank (5) and a second-stage spray recovery tank (6), and is characterized in that the first-stage spray tower (1) and the second-stage spray tower (2) comprise a tower body (7), a waste gas discharge pipe (8), a waste gas discharge pipe (9), a liquid discharge pipe (11) and a spray pipe (10), a first mesh partition plate (14), a second mesh partition plate (15), a third mesh partition plate (17) and a fourth partition plate (18) are fixed in the tower body (7) from top to bottom, the spray pipe (10) is connected with two spray branches (12), one of the spray branches (12) extends to the upper part of the first mesh partition plate (14) in the tower body (7), the other spray branch (12) extends to the second partition plate (15) and the third partition plate (17) in the tower body (7), a rotating shaft (19) is arranged between the spray tower body (7), and a rotating shaft (19) is provided with a rotating motor (19), the side wall of the tower body (7) is provided with a filler adding port (25) and a filler cleaning port (16).

2. The ammonia recovery system for the post-stage tail gas treatment for the synthesis of o-chlorobenzonitrile according to claim 1, wherein the rotating motor (21) is fixed on the outer wall of the tower body (7), the output shaft of the rotating motor (21) extends to the inside of the tower body (7) and is fixed with a driving bevel gear (22), the bottom end of the rotating shaft (19) is fixed with a driven bevel gear (20), and the driving bevel gear (22) is meshed with the driven bevel gear (20).

3. The ammonia recovery system for the post-treatment of tail gas in the synthesis of o-chlorobenzonitrile according to claim 1, wherein the second mesh partition (15) and the fourth mesh partition (18) are used for supporting the packing, and the number of the vertical scrapers (23) is two, wherein one vertical scraper (23) is located between the first mesh partition (14) and the second mesh partition (15), and the other vertical scraper (23) is located between the third mesh partition (17) and the fourth mesh partition (18).

4. The post-stage tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile according to claim 1, wherein the waste gas discharge pipe (9) is fixed at the top end of the tower body (7), and the waste gas discharge pipe (8) is fixed at the position close to the bottom end of the side wall of the tower body (7).

5. The post-stage tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile according to claim 1, wherein the bottom liquid discharge pipes (11) of the primary spray tower (1) and the secondary spray tower (2) are respectively communicated with the primary spray recovery tank (5) and the secondary spray recovery tank (6).

6. The rear-section tail gas treatment ammonia recovery system for synthesizing o-chlorobenzonitrile according to claim 1, wherein two dredging brushes (24) are further fixed on the outer side of the rotating shaft (19), the two dredging brushes (24) are respectively and correspondingly positioned below the two sprayers (13), and the top ends of the dredging brushes (24) are in contact with the bottom ends of the sprayers (13).