CN204151263U - The recycling system of tail gas - Google Patents
The recycling system of tail gas Download PDFInfo
- Publication number
- CN204151263U CN204151263U CN201420479212.8U CN201420479212U CN204151263U CN 204151263 U CN204151263 U CN 204151263U CN 201420479212 U CN201420479212 U CN 201420479212U CN 204151263 U CN204151263 U CN 204151263U
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- CN
- China
- Prior art keywords
- tank
- recovery tower
- strainer
- xylol
- methyl acetate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a kind of recycling system of tail gas, it is characterized in that: it comprises return tank (1), described return tank (1) is connected with the fluid inlet of methyl acetate recovery tower (2) sidewall, the top of described methyl acetate recovery tower (2) is connected with surge tank (3) by pipeline, this surge tank (3) rear side is connected with the first strainer (4) by pipeline, the rear side of described first strainer (4) is connected with circulation acetic acid tank (5) by pipeline, ritalin is back in return tank (1) by return line (6) by described circulation acetic acid tank (5), the bottom of described methyl acetate recovery tower (2) is connected with p-Xylol recovery tower (8) by the second strainer (7), this p-Xylol recovery tower (8) is connected with dehydration tower (10) by the 3rd strainer (9).The recycling system of this tail gas can reduce acetic acid and p-Xylol consumption, significantly reduces production cost.
Description
Technical field
The utility model relates to a kind of recycling system of tail gas, to ritalin in tail gas and p-Xylol reclaims in producing for pure terephthalic acid.
Background technology
Containing more ritalin and p-Xylol in the tail gas that pure terephthalic acid's production process back warp oxidizing reaction produces, these ritalins and p-Xylol can be accumulated in return tank, cause tower voltage rise high, cause that to send the purity of ritalin in liquid lower simultaneously, make oxidation dehydration tower operational difficulty, and make the consumption of acetic acid and p-Xylol comparatively large, result in the raising of production cost.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and reduces acetic acid and p-Xylol consumption, reduce the recycling system of the tail gas of production cost.
The purpose of this utility model is achieved in that
The recycling system of the utility model tail gas, comprise return tank, described return tank is connected with the fluid inlet of methyl acetate recovery tower side wall, the top of described methyl acetate recovery tower is connected with surge tank by pipeline, the first strainer is connected with by pipeline on rear side of this surge tank, the rear side of described first strainer is connected with circulation acetic acid tank by pipeline, ritalin is back in return tank by return line by described circulation acetic acid tank, the bottom of described methyl acetate recovery tower is connected with p-Xylol recovery tower by the second strainer, this p-Xylol recovery tower is connected with dehydration tower by the 3rd strainer.
Compared with prior art, the beneficial effects of the utility model are:
Liquid in return tank passes in a recycling system and processes by the recycling system of this tail gas, by methyl acetate recovery tower and p-Xylol recovery tower, liquid is purified, liquid circulation can be made to flow, and be unlikely to accumulate in return tank, and the purity liquid of the ritalin making to enter in dehydration tower and p-Xylol is higher, optimize the operation of dehydration tower, also reduce the consumption of ritalin and p-Xylol, and then reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the recycling system of the utility model tail gas.
Wherein: return tank 1, methyl acetate recovery tower 2, surge tank 3, first strainer 4, circulation acetic acid tank 5, return line 6, second strainer 7, p-Xylol recovery tower 8, the 3rd strainer 9, dehydration tower 10.
Embodiment
See Fig. 1, the utility model relates to a kind of recycling system of tail gas, comprise return tank 1, described return tank 1 is connected with the fluid inlet of methyl acetate recovery tower 2 sidewall, the top of described methyl acetate recovery tower 2 is connected with surge tank 3 by pipeline, the first strainer 4 is connected with by pipeline on rear side of this surge tank 3, the rear side of described first strainer 4 is connected with circulation acetic acid tank 5 by pipeline, ritalin is back to continuation in return tank 1 by return line 6 and utilizes by described circulation acetic acid tank 5, the bottom of described methyl acetate recovery tower 2 is connected with p-Xylol recovery tower 8 by the second strainer 7, this p-Xylol recovery tower 8 is connected with dehydration tower 10 by the 3rd strainer 9, the ritalin making purity higher and p-Xylol enter in dehydration tower 10.
Liquid in return tank 1 passes in a recycling system and processes by the recycling system of this tail gas, purified by methyl acetate recovery tower 2 and p-Xylol recovery tower 8 pairs of liquid, liquid circulation can be made to flow, and be unlikely to accumulate in return tank 1, and the purity liquid of the ritalin making to enter in dehydration tower 10 and p-Xylol is higher, optimize the operation of dehydration tower 10, also reduce the consumption of ritalin and p-Xylol, and then reduce production cost.
Claims (1)
1. the recycling system of a tail gas, it is characterized in that: it comprises return tank (1), described return tank (1) is connected with the fluid inlet of methyl acetate recovery tower (2) sidewall, the top of described methyl acetate recovery tower (2) is connected with surge tank (3) by pipeline, this surge tank (3) rear side is connected with the first strainer (4) by pipeline, the rear side of described first strainer (4) is connected with circulation acetic acid tank (5) by pipeline, ritalin is back in return tank (1) by return line (6) by described circulation acetic acid tank (5), the bottom of described methyl acetate recovery tower (2) is connected with p-Xylol recovery tower (8) by the second strainer (7), this p-Xylol recovery tower (8) is connected with dehydration tower (10) by the 3rd strainer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479212.8U CN204151263U (en) | 2014-08-25 | 2014-08-25 | The recycling system of tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420479212.8U CN204151263U (en) | 2014-08-25 | 2014-08-25 | The recycling system of tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204151263U true CN204151263U (en) | 2015-02-11 |
Family
ID=52509397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420479212.8U Active CN204151263U (en) | 2014-08-25 | 2014-08-25 | The recycling system of tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204151263U (en) |
-
2014
- 2014-08-25 CN CN201420479212.8U patent/CN204151263U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |