CN210885874U - A device that is arranged in 2-ethylanthraquinone cyclization spent acid crude recovery processing - Google Patents
A device that is arranged in 2-ethylanthraquinone cyclization spent acid crude recovery processing Download PDFInfo
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- CN210885874U CN210885874U CN201921468170.7U CN201921468170U CN210885874U CN 210885874 U CN210885874 U CN 210885874U CN 201921468170 U CN201921468170 U CN 201921468170U CN 210885874 U CN210885874 U CN 210885874U
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- toluene
- waste acid
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Abstract
The utility model provides a device for crude recovery processing in 2-ethylanthraquinone cyclization spent acid, it is including spent acid surge tank, spent acid surge tank and spent acid charge pump access connection, spent acid charge pump is connected with the feed inlet on toluene extraction tower upper portion, toluene extraction tower lower part exit linkage to spent acid basin, toluene extraction tower top export is connected with the feed inlet of alkaline cleaning treatment tower lower part one side, alkaline cleaning treatment tower top export and toluene stills top access connection, toluene stills top export is connected with the condenser, condenser and toluene storage tank access connection, toluene storage tank export and toluene charge pump access connection, toluene charge pump exit linkage to toluene extraction tower lower part feed inlet, the alkali lye storage tank passes through the lye pump and is connected with the alkaline cleaning treatment tower. The scheme has the advantages of simple structure, simple and convenient operation process and good process safety.
Description
Technical Field
The utility model relates to the technical field of clean production and 'three wastes' treatment process, in particular to a device for recovering and treating crude products in 2-ethyl anthraquinone cyclization waste acid.
Background
2- (4' -ethylbenzoyl) benzoic acid is dehydrated and closed-loop-closed by fuming sulfuric acid to produce 2-ethyl anthraquinone crude product, the 2-ethyl anthraquinone crude product is dissolved in concentrated sulfuric acid and needs to be hydrolyzed, diluted and separated out, the 2-ethyl anthraquinone crude product separated out by water separation is in a molten state and needs to be stirred, cooled and crystallized to form solid particles, and thus the crude product can be conveniently separated. However, a certain amount of coarse fine particles can be generated in the stirring, cooling and crystallizing processes, and during the separation process, the coarse fine particles can penetrate through the filter cloth and enter the cyclized waste acid, and a small amount of coarse particles are leaked out due to the damaged filter cloth or brought into the cyclized waste acid during the cleaning of the filter cloth, so that the yield of the coarse particles is reduced, and precipitates in the cyclized waste acid are increased, so that pipelines and pumps are blocked during the conveying of the cyclized waste acid, and the normal conveying is affected. In addition, the increase of the precipitate of the cyclized waste acid brings great influence to the treatment of the cyclized waste acid, limits the application range of the comprehensive utilization of the cyclized waste acid, seriously influences the sales volume of the treatment of the cyclized waste acid, and restricts the normal production of 2-ethylanthraquinone enterprises. The total amount of precipitates in the cyclized waste acid is reduced by improving the process technology, the treatment requirement of the cyclized waste acid is facilitated, the application range of comprehensive utilization of the cyclized waste acid is expanded, and the problem of treatment of the cyclized waste acid is solved. By analyzing precipitates in the cyclized waste acid, the anthraquinone sulfonate which is mainly a side reaction anthraquinone sulfonate generated by fine particle crude products and closed loop reaction in the separation process is determined, the anthraquinone sulfonate can be dissolved in dilute sulfuric acid at high temperature, the solubility is reduced after cooling, the anthraquinone sulfonate is changed into fine particles to be precipitated, and the precipitates are fine, are easy to block filter cloth holes and are not suitable for filtering in a suction filtration cylinder and separation in a centrifugal machine. In addition, because the anthraquinone sulfonate has complex components and low recovery value, the anthraquinone sulfonate is mainly used for recovering fine particle crude products which are easily dissolved in solvents such as toluene and the like, and can be recovered by an extraction method. Because the cyclized waste acid has large amount, the amount of the cyclized waste acid containing the recycled crude product is not large, and more anthraquinone sulfonate is brought out during extraction, the recycled crude product has a lot of impurities, and subsequent refining and purification are influenced. A set of equipment suitable for continuous extraction and purification is designed according to the characteristics of the recovered crude product, so that the problems in the extraction process are solved.
Disclosure of Invention
The utility model aims to provide a device that is used for among 2-ethylanthraquinone cyclization waste acid crude recovery processing rational in infrastructure, the security is good, operation process is simple and convenient.
In order to achieve the above object, the present invention provides a technical solution: a device for recovering and treating crude products in 2-ethylanthraquinone cyclization waste acid comprises a waste acid adjusting tank, a waste acid feed pump, a toluene extraction tower, an alkaline washing treatment tower, an alkaline pump, an alkaline storage tank, a toluene distillation kettle, a condenser, a toluene storage tank, a toluene feed pump and a toluene flow meter, wherein the waste acid adjusting tank is connected with an inlet of the waste acid feed pump, the waste acid feed pump is connected with a feed inlet at the upper part of the toluene extraction tower, an outlet at the lower part of the toluene extraction tower is connected with the waste acid storage tank, an outlet at the top of the toluene extraction tower is connected with a feed inlet at one side of the lower part of the alkaline washing treatment tower, an outlet at the top of the alkaline washing treatment tower is connected with an inlet at the top of the toluene distillation kettle, an outlet at the top of the toluene distillation kettle is connected with the condenser, the condenser is, the alkali liquor storage tank is connected with the alkali washing treatment tower through an alkali liquor pump.
And a toluene flow meter is connected at the outlet of the toluene feeding pump.
And the outlet of the waste acid feeding pump is connected with a waste acid flowmeter.
By adopting the above technical scheme, the utility model, utilize the characteristic that extraction phase density is little, insoluble, easy come-up, constantly disperse and contact in the tower internal packing, make the acidic material in the extraction phase react with alkali lye, reach the purpose that deacidification falls miscellaneous. And (3) the extract phase after the acid removal treatment enters a toluene distillation kettle, the extract phase is heated and distilled, a condenser is cooled, the distilled and recovered toluene enters a toluene storage tank for next recovery and extraction, the toluene extract phase is evaporated to be a molten crude product, and the molten crude product is put into a crude product for tabletting to obtain a recovered crude product.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings, and the preferred embodiment of the present invention is: referring to the attached drawing 1, the device for recovering and treating the crude product in the 2-ethylanthraquinone cyclization waste acid comprises a waste acid adjusting tank 1, a waste acid feed pump 2, a waste acid flow meter 3, a toluene extraction tower 4, an alkaline washing treatment tower 5, an alkaline pump 6, an alkaline storage tank 7, a toluene distillation kettle 8, a condenser 9, a toluene storage tank 10, a toluene feed pump 11 and a toluene flow meter 12, and is characterized in that: the method comprises the steps of putting cyclized waste acid into a waste acid adjusting tank 1, adjusting the specific gravity to 1.3-1.4 by using rinsing wastewater, then pumping the cyclized waste acid into a feed inlet at the upper part of a toluene extraction tower 3 by using a waste acid feed pump 2, pumping toluene into a feed inlet at the lower part of the toluene extraction tower 3 from a toluene storage tank 10 by using an extracting agent toluene feed pump 11, performing reverse extraction by using the characteristics that cyclized waste acid and toluene are different in specific gravity and are not dissolved mutually, enabling two liquid-phase materials to flow up and down in the extraction tower, enabling fine 2-ethyl anthraquinone particles in the cyclized waste acid to be dissolved in the toluene through continuous dispersion and contact of fillers in the tower, enabling the cyclized waste acid to be discharged from the upper part of the extraction tower along with upward floating of an extraction phase to enter an alkaline washing treatment. The cyclized waste acid inlet pipe is arranged at the upper part of the toluene extraction tower, and the waste acid discharge port after extraction is 50cm lower than the cyclized waste acid inlet pipe, so that the cyclized waste acid content in the toluene extraction tower is ensured to be more than half. A certain amount of alkali liquor is pumped into the alkali washing treatment tower from an alkali liquor storage tank 7 by an alkali liquor pump 6 in advance, an extract phase passing through the extraction tower enters from the lower part of the alkali washing treatment tower, and the acidic substances in the extract phase react with the alkali liquor by continuously dispersing and contacting in a filler in the tower by utilizing the characteristics of small specific gravity, insolubility and easiness in floating of the extract phase, so that the purposes of removing acid and reducing impurities are achieved. And (3) the extract phase after the acid removal treatment enters a toluene distillation kettle 8, the extract phase is heated and distilled, a condenser 9 is cooled, the toluene recovered by distillation enters a toluene storage tank 10 for the next recovery and extraction, the toluene extract phase is evaporated to be a molten crude product, and the molten crude product is put into a crude product for tabletting to obtain the recovered crude product.
Based on the device, the cyclized waste acid inlet pipe is arranged at the upper part of the toluene extraction tower, and the waste acid discharge outlet after extraction is 50cm lower than the cyclized waste acid inlet pipe. Ensuring that the cyclized waste acid amount in the toluene extraction tower reaches more than half.
Based on above-mentioned device, the circulation spent acid passes through spent acid flowmeter (3) before entering toluene extraction tower, and the toluene ring passes through toluene flowmeter (12) before entering toluene extraction tower, should be according to the extraction condition suitable adjustment in the operation process, spent acid volume: toluene amount = 1: 10 to 30.
Based on the device, the device for recovering the toluene by distilling the extract phase can be designed to be a batch type or a continuous type, and is mainly determined according to the generation condition of the cyclized waste acid and the use condition of the toluene.
Based on the device, an online PH value monitor is arranged in the alkaline washing treatment tower 5, and the alkaline washing treatment effect is controlled in time. When the pH value is lower than the control value of 10, the alkali liquor should be replaced in time, and the concentration of the alkali liquor is 10-15%.
The embodiment has the advantages of simple structure, simple and convenient operation process and good process safety.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. A device that is arranged in 2-ethylanthraquinone cyclization spent acid crude recovery to handle, it is including spent acid adjusting tank (1), spent acid charge pump (2), toluene extraction tower (3), alkali wash treating tower (5), lye pump (6), alkali lye storage tank (7), toluene distillation still (8), condenser (9), toluene storage tank (10), toluene charge pump (11), toluene flowmeter (12), its characterized in that: waste acid adjusting tank (1) is connected with waste acid feed pump (2) inlet, waste acid feed pump (2) is connected with the feed inlet on toluene extraction tower (3) upper portion, toluene extraction tower (3) lower part exit linkage to waste acid basin, toluene extraction tower (3) top export is connected with the feed inlet of alkali wash treatment tower (5) lower part one side, alkali wash treatment tower (5) top export and toluene distillation cauldron (8) top entry linkage, toluene distillation cauldron (8) top export is connected with condenser (9), condenser (9) and toluene storage tank (10) entry linkage, toluene storage tank (10) export and toluene feed pump (11) entry linkage, toluene feed pump (11) exit linkage is on toluene extraction tower (3) lower part feed inlet, alkali lye storage tank (7) are connected with alkali wash treatment tower (5) through alkali lye pump (6).
2. The device for recovering and treating the crude product in the 2-ethylanthraquinone cyclization waste acid as claimed in claim 1, is characterized in that: the outlet of the toluene feeding pump (11) is connected with a toluene flow meter (12).
3. The device for recovering and treating the crude product in the 2-ethylanthraquinone cyclization waste acid as claimed in claim 1, is characterized in that: the outlet of the waste acid feed pump (2) is connected with a waste acid flowmeter (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921468170.7U CN210885874U (en) | 2019-09-05 | 2019-09-05 | A device that is arranged in 2-ethylanthraquinone cyclization spent acid crude recovery processing |
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| CN201921468170.7U CN210885874U (en) | 2019-09-05 | 2019-09-05 | A device that is arranged in 2-ethylanthraquinone cyclization spent acid crude recovery processing |
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| CN210885874U true CN210885874U (en) | 2020-06-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956146A (en) * | 2021-11-22 | 2022-01-21 | 浙江金科日化原料有限公司 | Environment-friendly 2-ethyl anthraquinone production process |
| CN114471429A (en) * | 2022-01-26 | 2022-05-13 | 重庆毂运科技有限公司 | Refining kettle for producing 2-ethyl anthraquinone and refining process of 2-ethyl anthraquinone |
-
2019
- 2019-09-05 CN CN201921468170.7U patent/CN210885874U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956146A (en) * | 2021-11-22 | 2022-01-21 | 浙江金科日化原料有限公司 | Environment-friendly 2-ethyl anthraquinone production process |
| CN113956146B (en) * | 2021-11-22 | 2023-11-24 | 浙江金科日化新材料股份有限公司 | 2-ethyl anthraquinone production process |
| CN114471429A (en) * | 2022-01-26 | 2022-05-13 | 重庆毂运科技有限公司 | Refining kettle for producing 2-ethyl anthraquinone and refining process of 2-ethyl anthraquinone |
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Effective date of registration: 20210204 Address after: 312000 Shangyu Economic and Technological Development Zone, Hangzhou Bay, Shaoxing City, Zhejiang Province Patentee after: ZHEJIANG JINKE HOUSEHOLD CHEMICAL MATERIALS Co.,Ltd. Address before: 313000 Jieshan, Longmen Qiao Zhuang, Chongzhao village, Hefu Town, Nanxun District, Huzhou City, Zhejiang Province Patentee before: HUZHOU JICHANG CHEMICAL Co.,Ltd. |
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Address after: 312000 Shangyu Economic and Technological Development Zone, Hangzhou Bay, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Jinke Daily Chemical New Materials Co.,Ltd. Address before: 312000 Shangyu Economic and Technological Development Zone, Hangzhou Bay, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG JINKE HOUSEHOLD CHEMICAL MATERIALS Co.,Ltd. |