CN103420778A - Five-level crude benzene distillation refining system - Google Patents
Five-level crude benzene distillation refining system Download PDFInfo
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- CN103420778A CN103420778A CN2012101631026A CN201210163102A CN103420778A CN 103420778 A CN103420778 A CN 103420778A CN 2012101631026 A CN2012101631026 A CN 2012101631026A CN 201210163102 A CN201210163102 A CN 201210163102A CN 103420778 A CN103420778 A CN 103420778A
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Abstract
The invention discloses a five-level crude benzene distillation refining system. The system is mainly composed of a two benzene separation tower, a primary distillation tower, a pickling tower, a benzene blowing tower, and a rectification tower. The system is advantaged by simple structure, low cost, and good distillation effect.
Description
Technical field
The present invention relates to crude benzene refining, specifically refer to crude benzol Pyatyi distillation refining system.
Background technology
Crude benzol is one of product in the raw gas that generates of pyrolysis of coal, in the coke-oven gas after deamination, contains benzene compounds, wherein take benzene content as main, is referred to as crude benzol.
From the coal-gas recovering crude benzol, the most frequently used method is the washing oil absorption process.For reaching 90%～96% the rate of recovery, employing multistage counter current absorption process.Absorption temperature is not higher than 20～25 ℃.
Coal gas after whole cold, containing crude benzol 25～40g/m3, enters the crude benzol absorption tower, sprays washing oil on tower, coal gas flows from top to bottom, coal gas and washing oil counter current contact, and washing oil absorbs crude benzol becomes rich benzene washing oil, rich oil is taken off the crude benzol of absorption, is called oil-poorly, oil-poorly absorbs crude benzol and becomes again rich oil washing the benzene tower.Rich oil is containing benzene 2～2.5%, oil-poor containing benzene 0.2～0.4%.The method that rich oil de-benzene is suitable is to adopt steam distillation.Rich oil is preheating to 135～140 ℃ and reenters debenzolizing tower, passes into water vapour at the bottom of tower, and wirking pressure is 0.5～0.6Mpa.Also can adopt diamond heating rich oil to 180 ℃ to reenter debenzolizing tower.
The crude benzol that production obtains, in the later stage, also need to be prepared as the Chemicals that various compositions differ, and for this reason, general crude benzol is made with extra care and produced, and the composition obtained is not high in concentration, and in component, impurity is more, and exquisite effect is bad.For this reason, we need to design the system that a kind of energy high-speed and high-efficiency carries out crude benzene refining production.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, cost is low, and production effect is good, and cut concentration is high, the crude benzol Pyatyi distillation refining system that impurity is less.
Implementation of the present invention is as follows: crude benzol Pyatyi distillation refining system mainly consists of the two benzene knockout towers, primary tower, pickling tower, benzene blowing tower, the rectifying tower that connect successively.
Described two benzene knockout towers comprise clumsy import, light benzene outlet, heavy benzol outlet, and described light benzene outlet is connected with primary tower.
Described primary tower comprises that starting fraction is from products export, starting fraction outlet, and described starting fraction outlet is connected with the pickling tower.
Described benzene blowing tower comprises discharge port, product outlet, and described discharge port is connected with rectifying tower.
Described rectifying tower also is connected with and heats up in a steamer tower end, and described rectifying tower comprises that refining benzene outlet for product, rectifying divide discharge port, and described rectifying divides discharge port and end to heat up in a steamer tower and is connected.
Heat up in a steamer described end tower comprise toluene dimethylbenzene discharge port and solvent oil feed inlet and outlet.
Based on foregoing, Production Flow Chart of the present invention is: the crude benzol material is added in the clumsy import at two benzene knockout towers, through the centrifugation of two benzene knockout towers, heavy benzol and light benzene is separated.The heavy benzol composition flows out from the heavy benzol outlet, and the light benzene composition extracts from the light benzene outlet.
Then the light benzene composition being transported to primary tower distills for the first time, distillation through primary tower is processed, can obtain fore-running product separation and starting fraction, the fore-running product separation is reclaimed from products export by starting fraction, and starting fraction is transported to the pickling tower through piping, carries out cleanup acid treatment.
Starting fraction after pickling is transported to benzene blowing tower again, carries out injection of separation, and the starting fraction after separation again is transported to rectifying tower and carries out the exquisiteness preparation.At the rectifying tower place, we will obtain the refining benzene product, and above-mentioned refining benzene product is reclaimed by the refining benzene outlet for product.
Simultaneously the composition after exquisite preparation is transported to that heating up in a steamer tower distills processing eventually.Finally isolate toluene the dimethylbenzene composition, and solvent oil.Toluene the dimethylbenzene composition by toluene the dimethylbenzene discharge port reclaimed, solvent oil is reclaimed by the solvent oil feed inlet and outlet.
Be accomplished the exquisiteness preparation of whole crude benzol with this.The present invention processes with five times, carries out fractionation by distillation.Effect compared with prior art.Composition after distillation is upper, and the concentration that the present invention obtains is higher, and impurity still less.
The invention has the advantages that: simple in structure, cost is low for this reason, and distilling effect is good.
The accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Embodiment mono-
As shown in Figure 1.
Crude benzol Pyatyi distillation refining system, mainly consist of the two benzene knockout towers, primary tower, pickling tower, benzene blowing tower, the rectifying tower that connect successively.
Two benzene knockout towers comprise clumsy import, light benzene outlet, heavy benzol outlet, and the light benzene outlet is connected with primary tower.
Primary tower comprises that starting fraction is from products export, starting fraction outlet, and the starting fraction outlet is connected with the pickling tower.
Benzene blowing tower comprises discharge port, product outlet, and discharge port is connected with rectifying tower.
Rectifying tower also is connected with and heats up in a steamer tower end, and rectifying tower comprises that refining benzene outlet for product, rectifying divide discharge port, and rectifying divides discharge port and end to heat up in a steamer tower and is connected.
Heat up in a steamer eventually tower comprise toluene dimethylbenzene discharge port and solvent oil feed inlet and outlet.
Based on foregoing, Production Flow Chart of the present invention is: the crude benzol material is added in the clumsy import at two benzene knockout towers, through the centrifugation of two benzene knockout towers, heavy benzol and light benzene is separated.The heavy benzol composition flows out from the heavy benzol outlet, and the light benzene composition extracts from the light benzene outlet.
Then the light benzene composition being transported to primary tower distills for the first time, distillation through primary tower is processed, can obtain fore-running product separation and starting fraction, the fore-running product separation is reclaimed from products export by starting fraction, and starting fraction is transported to the pickling tower through piping, carries out cleanup acid treatment.
Starting fraction after pickling is transported to benzene blowing tower again, carries out injection of separation, and the starting fraction after separation again is transported to rectifying tower and carries out the exquisiteness preparation.At the rectifying tower place, we will obtain the refining benzene product, and above-mentioned refining benzene product is reclaimed by the refining benzene outlet for product.
Simultaneously the composition after exquisite preparation is transported to that heating up in a steamer tower distills processing eventually.Finally isolate toluene the dimethylbenzene composition, and solvent oil.Toluene the dimethylbenzene composition by toluene the dimethylbenzene discharge port reclaimed, solvent oil is recycled by the solvent oil feed inlet and outlet.
Be accomplished the exquisiteness preparation of whole crude benzol with this.The present invention processes with five times, carries out fractionation by distillation.Effect compared with prior art.Composition after distillation is upper, and the concentration that the present invention obtains is higher, and impurity still less.
As above, can well realize the present invention.
Claims (6)
1. crude benzol Pyatyi distillation refining system, is characterized in that: mainly the two benzene knockout towers, primary tower, pickling tower, benzene blowing tower, the rectifying tower that connect successively, consist of.
2. crude benzol Pyatyi according to claim 1 is distilled refining system, it is characterized in that: described two benzene knockout towers comprise clumsy import, light benzene outlet, heavy benzol outlet, and described light benzene outlet is connected with primary tower.
3. crude benzol Pyatyi according to claim 1 is distilled refining system, it is characterized in that: described primary tower comprises that starting fraction is from products export, starting fraction outlet, and described starting fraction outlet is connected with the pickling tower.
4. crude benzol Pyatyi according to claim 1 is distilled refining system, and it is characterized in that: described benzene blowing tower comprises discharge port, product outlet, and described discharge port is connected with rectifying tower.
5. according to the described crude benzol Pyatyi distillation of any one in claim 1-4 refining system, it is characterized in that: described rectifying tower also is connected with and heats up in a steamer eventually tower, described rectifying tower comprises that refining benzene outlet for product, rectifying divide discharge port, and described rectifying divides discharge port and end to heat up in a steamer tower and is connected.
6. crude benzol Pyatyi according to claim 5 distillation refining system is characterized in that: heat up in a steamer described end tower comprise toluene dimethylbenzene discharge port and solvent oil feed inlet and outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101631026A CN103420778A (en) | 2012-05-24 | 2012-05-24 | Five-level crude benzene distillation refining system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101631026A CN103420778A (en) | 2012-05-24 | 2012-05-24 | Five-level crude benzene distillation refining system |
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| CN2012101631026A Pending CN103420778A (en) | 2012-05-24 | 2012-05-24 | Five-level crude benzene distillation refining system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001906A (en) * | 2007-01-08 | 2011-04-06 | 太原市侨友化工有限公司 | Coked crude benzene refining method |
| CN202554965U (en) * | 2012-05-24 | 2012-11-28 | 四川康源医疗设备有限公司 | Five-degree distillation refining system for crude benzol |
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2012
- 2012-05-24 CN CN2012101631026A patent/CN103420778A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001906A (en) * | 2007-01-08 | 2011-04-06 | 太原市侨友化工有限公司 | Coked crude benzene refining method |
| CN202554965U (en) * | 2012-05-24 | 2012-11-28 | 四川康源医疗设备有限公司 | Five-degree distillation refining system for crude benzol |
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Application publication date: 20131204 |