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Negative-pressure debenzylation device and negative-pressure debenzolization method

A technology for removing benzene and negative pressure, applied in chemical instruments and methods, hydrocarbons, organic chemistry, etc., can solve the problems of high production consumption, low quality, low recovery rate, etc., and achieve the effect of easy separation and condensation

Active Publication Date: 2015-12-16
SHANDONG TIEXIONG XINSHA ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a negative pressure benzene removal device and a benzene removal method, which overcomes the shortcomings of the prior art such as low quality of recovered products, low recovery rate and large production consumption, greatly improves the efficiency of benzene removal, and improves factory environment

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  • Negative-pressure debenzylation device and negative-pressure debenzolization method

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Embodiment Construction

[0023] The present invention will be further described below in combination with specific embodiments.

[0024] A negative pressure benzene removal device, comprising a final cooler 1, a benzene washing tower 2, a benzene removal tower 3, a tube furnace 4, a crude benzene condensation cooler 5, an oil-water separator 6, a crude benzene reflux tank 7, and a crude benzene intermediate Tank 8, control separator 9, lean-rich oil heat exchanger 10, new oil washing tank 11, lean oil tank 12, first-stage lean-oil cooler 13, second-stage lean-oil cooler 14, regenerator 15, slag discharge tank 16, second-stage lean oil cooler A rich oil pump 17, a benzene benzene return pump 18, a lean oil pump 19, a semi-rich oil pump 20, a second rich oil pump 21, a mist trap tower 22, a vacuum pump 23, a vacuum tank 24, and a vacuum pump circulation tank 25;

[0025] The final cooler 1 is connected with a circulating water upper water channel, a circulating water return channel, a cooling water uppe...

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Abstract

The invention discloses a negative-pressure debenzylation device and a negative-pressure debenzolization method. The negative-pressure debenzolization device comprises a final cooler (1), benzol washers (2), a debenzylation tower (3), a tube furnace (4), a crude benzol condensation cooler (5), a rich and poor oil heat exchanger (10), a regenerator (15), a vacuum tank (24), a mist trap tower (22), vacuum pumps (23), a vacuum pump circulating water channel (25) and the like. According to the negative-pressure debenzylation device and the negative-pressure debenzolization method disclosed by the invention, a negative-pressure environment helping to improve the relative volatility of light benzol during oil washing and reduce the mixed vapor escaping from the tower top is created, so that the separation and condensation of the light benzol are facilitated; the vacuum tank, the mist trap tower, the two vacuum pumps (23) and the vacuum pump circulating water channel are arranged in sequence at a position where the crude benzol condensation cooler is connected so as to ensure the negative pressure requirements of part of important systems, therefore the defects that the quality of recovered products is lower, the recovery rate is low and the production consumption is higher in the prior art are overcome, the debenzylation efficiency is greatly increased, and the factory environment is improved.

Description

technical field [0001] The invention belongs to the field of removal and recovery of benzene contained in coke oven gas in a gas purification system, and in particular relates to a negative pressure debenzene device and a benzene removal method. Background technique [0002] Most of the existing oil-rich debenzene processes are the normal-pressure steam distillation method of heating oil-rich oil through a tube furnace. After the gas is cooled to 24-26°C by the final cooling tower, it passes through two benzene washing towers in turn. The washing oil contains about 2% benzene, which is called rich oil, and the rich oil is called lean oil after debenzene removal by the debenzene device, and is recycled. At present, there are two main problems in the atmospheric pressure debenzene process: one is that the crude benzene vapor distilled during atmospheric distillation has a high boiling point temperature, and the benzene group hydrocarbons in the rich oil cannot be completely di...

Claims

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Application Information

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IPC IPC(8): C10K1/18C10K1/00C07C15/04C07C7/00
Inventor 宁俊凡吴盛海魏允华吴延锐程方张立志杨启昌撒玉虎
Owner SHANDONG TIEXIONG XINSHA ENERGY CO LTD
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