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Recovery process of coking crude benzene dispersing gas and device thereof

A technology of coking crude benzene and releasing gas, which is applied in the field of coke oven gas purification, can solve the problems of sewage system paralysis and benzene gas cannot be removed, and achieve the effect of reducing production costs, reducing emissions, and good results

Active Publication Date: 2010-11-10
南京金瀚环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process only uses water washing and cooling spraying treatment for the residue, and relies on the adsorption characteristics to remove some impurities, but it cannot remove benzene gas, and produces a large amount of washing liquid, and the oily washing liquid will seriously cause the sewage system to be paralyzed.

Method used

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  • Recovery process of coking crude benzene dispersing gas and device thereof
  • Recovery process of coking crude benzene dispersing gas and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The coking crude benzene release gas recovery process of the present embodiment is carried out according to the following steps:

[0027] (1) Concentrate and recover the vented gas of each storage tank in the gas purification crude benzene recovery area of ​​the coking plant through the pipeline, and lead it into the scrubber through the pipeline, and the flow direction of the vented gas in the scrubber is from bottom to top;

[0028] (2) Use the washing oil after the lean oil cooler in the second stage of the crude benzene process of the coking plant as the absorption spray liquid, and spray it in the washing tower. The temperature of the washing oil is 25 ° C, and the spraying direction of the washing oil in the washing tower is from Spray from top to bottom to absorb benzene, naphthalene and other organic substances in the vented gas from each storage tank;

[0029] (3) The washing oil that has absorbed benzene, naphthalene and other organic matter flows to the botto...

Embodiment 2

[0034] The coking crude benzene release gas recovery process of the present embodiment is carried out according to the following steps:

[0035] (1) Concentrate and recover the vented gas of each storage tank in the gas purification crude benzene recovery area of ​​the coking plant through the pipeline, and lead it into the scrubber through the pipeline, and the flow direction of the vented gas in the scrubber is from bottom to top;

[0036] (2) Use the washing oil after the lean oil cooler in the second stage of the crude benzene process of the coking plant as the absorption spray liquid, and spray it in the washing tower. The temperature of the washing oil is 26 ° C, and the spraying direction of the washing oil in the washing tower is from Spray from top to bottom to absorb benzene, naphthalene and other organic substances in the vented gas from each storage tank;

[0037] (3) The washing oil that has absorbed benzene, naphthalene and other organic matter flows to the botto...

Embodiment 3

[0042] The coking crude benzene release gas recovery process of the present embodiment is carried out according to the following steps:

[0043] (1) Concentrate and recover the vented gas of each storage tank in the gas purification crude benzene recovery area of ​​the coking plant through the pipeline, and lead it into the scrubber through the pipeline, and the flow direction of the vented gas in the scrubber is from bottom to top;

[0044] (2) Use the washing oil after the lean oil cooler in the second stage of the crude benzene process of the coking plant as the absorption spray liquid, and spray it in the washing tower. The temperature of the washing oil is 28 ° C, and the spraying direction of the washing oil in the washing tower is from Spray from top to bottom to absorb benzene, naphthalene and other organic substances in the vented gas from each storage tank;

[0045] (3) The washing oil that has absorbed benzene, naphthalene and other organic matter flows to the botto...

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Abstract

The invention belongs to the technical field of coke oven gas purification, and in particular relates to the recovery process of coking crude benzene dispersing gas and a device thereof. The recovery process comprises the following steps: the dispersing gas in each storage tank in a crude benzene production area is intensively recovered through a pipeline and then introduced into a special washing tower; wash oil at the temperature of 25-28 DEG C is sprayed from the top of the washing tower so as to absorb benzene, naphthalene and other organic matters from the dispersing gas; the wash oil absorbing benzene, naphthalene and other organic matters flows automatically into the bottom of the tower and then enters a front pipe of a rich oil pump through a communicating pipe at the bottom of the tower to be mixed with rich oil; and finally the obtained mixed oil is treated in a debenzolization tower. The invention requires no operating cost, greatly reduces toxic waste gas generated in the existing coking crude benzene production area, and improves operating environment.

Description

technical field [0001] The invention belongs to the technical field of coke oven gas purification, in particular to a coking crude benzene gas recovery process and a device thereof. Background technique [0002] In the crude benzene recovery area of ​​the coking plant, due to process requirements, the discharge pipes of the light benzene storage tank, light benzene condensation cooler, residue tank and naphthalene oil tank are all designed to be directly discharged into the atmosphere, which on the one hand causes a lot of Exhaust gases containing benzene and naphthalene enter the atmosphere and pollute the environment. On the other hand, a large amount of high-value benzene and naphthalene are lost and resources are wasted. [0003] In view of the above two problems of gas release from the coking crude benzene storage tank, some coking plants are currently connected to the gas pipeline in front of the gas blower through pipelines, and use clean gas for pressure balance: Fir...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/18C07C15/06C07C15/24C07C7/06
Inventor 李少源孙宝东倪迎国
Owner 南京金瀚环保科技有限公司
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