Purification and recovery method of coking exhaust gas

A recovery method and waste gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of substandard discharge and high operating costs, and achieve the effect of long service life

Pending Publication Date: 2019-03-15
铜陵泰富特种材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of substandard emissions and high operating costs in the prior art in the VOC treatment process of coking plants, and adopts a method for purifying and recovering coking waste gas with a fixed bed of hydrophobic molecular sieve. The method has safe and stable operation, Advantages of low operating costs

Method used

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  • Purification and recovery method of coking exhaust gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a. Coking exhaust gas enters the buffer tank, coarsely filters dust, viscous organic matter and moisture to form stream Ⅰ;

[0037] b. Stream I enters an adsorption tower in the adsorption device combination a. The adsorption device combination a includes 2 adsorption towers, and each adsorption tower is filled with mordenite molecular sieve adsorbent A to absorb hydrogen sulfide, ammonia, hydrogen cyanide and other Acid gas, forming stream II;

[0038] c. Stream II enters the adsorption device combination b, which contains 2 adsorption towers, and each adsorption tower is filled with ZSM-5 molecular sieve adsorbent B to adsorb tar, naphthalene, benzene series, polycyclic and heterocyclic Aromatic hydrocarbons and organic sulfur form stream III;

[0039] d. Logistics Ⅲ up-to-standard discharge;

[0040] e. When the adsorption towers in the adsorption device combinations a and b are saturated, each switch to other adsorption towers in the group for adsorption, and the ...

Embodiment 2

[0048] a. Coking exhaust gas enters the buffer tank, coarsely filters dust, viscous organic matter and moisture to form stream Ⅰ;

[0049] b. Stream I enters an adsorption tower in the adsorption device combination a. The adsorption device combination a includes 2 adsorption towers, and each adsorption tower is filled with molecular sieve adsorbent A to absorb hydrogen sulfide, ammonia gas, hydrogen cyanide and other acidic gas, forming stream II;

[0050] c. Stream II enters the adsorption device combination b, which includes 2 adsorption towers, and each adsorption tower is filled with molecular sieve adsorbent B to adsorb tar, naphthalene, benzene series, polycyclic and heterocyclic aromatic hydrocarbons and organic Sulfur, forming stream III;

[0051] d. Logistics Ⅲ up-to-standard discharge;

[0052] e. When the adsorption towers in the adsorption device combinations a and b are saturated, each switch to other adsorption towers in the group for adsorption, and the satura...

Embodiment 3

[0060] a. Coking exhaust gas enters the buffer tank, coarsely filters dust, viscous organic matter and moisture to form stream Ⅰ;

[0061] b. Stream I enters an adsorption tower in the adsorption device combination a. The adsorption device combination a contains at least 3 adsorption towers, and each adsorption tower is filled with molecular sieve adsorbent A to absorb hydrogen sulfide, ammonia, hydrogen cyanide and other Acid gas, forming stream II;

[0062] c. Stream II enters the adsorption device combination b, which contains at least 3 adsorption towers, and each adsorption tower is filled with molecular sieve adsorbent B to adsorb tar, naphthalene, benzene series, polycyclic and heterocyclic aromatic hydrocarbons and Organic sulfur, forming stream III;

[0063] d. Logistics Ⅲ up-to-standard discharge;

[0064] e. When the adsorption towers in the adsorption device combinations a and b are saturated, each switch to other adsorption towers in the group for adsorption, an...

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Abstract

The invention relates to a purification method of coking exhaust gas. The invention mainly aims at solving the technical problems of single adsorption types of coking exhaust gas adsorbed by activatedcarbon, no high temperature resistance and excessive exhaust gas emission in the prior art. The problems are well solved by adopting the technical scheme that the purification method comprises the following steps: the coking exhaust gas enters a buffer tank, is coarsely filtered and then enters a two-stage adsorption device for absorbing hydrogen sulfide, ammonia gas, hydrogen cyanide and other acidic gases in the coking exhaust gas, tar, naphthalene, benzene series, polycyclic aromatic hydrocarbon, heterocyclic aromatic hydrocarbon and organic sulfur; purified gas is exhausted; an adsorptiontower with saturated adsorption enters a regeneration program; the regenerated and condensed gas enters a cooler; cooled liquid enters a liquid storage tank for collection. The purification method can be used in the purification and recovery of the coking exhaust gas.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, in particular to a method for purifying and recovering coking waste gas. Background technique [0002] With the rapid development of the iron and steel industry, the coking industry has made great progress, but the environmental pollution is also becoming more and more serious. As the country proposes policies such as capacity reduction and structural adjustment, environmental protection will be one of the rigid targets for the coking industry. Among the various environmental protection issues in the coking industry, the pollution of waste gas from the coking industry is particularly prominent. There are many kinds of coking waste gas pollutants, generally including inorganic waste gas and organic waste gas. Inorganic waste gas is mainly hydrogen sulfide, ammonia gas, and hydrogen cyanide. Aromatics, etc. Inorganic waste gas mainly comes from coke oven gas, release from ammonium su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02B01D53/00B01D46/00
CPCB01D46/00B01D53/002B01D53/02B01D2257/304B01D2257/306B01D2257/406B01D2257/7027
Inventor 孙广亿虞文胜周稳华马广伟叶青保李腾姣
Owner 铜陵泰富特种材料有限公司
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