Method for purifying coke oven gas and recycling desulfurated liquid waste by virtue of vacuum potassium carbonate method

A technology of vacuum potassium carbonate and coke oven gas, which is applied in combustible gas purification, combustible gas purification/transformation, removal of gas pollutants, etc., can solve the problems of resource waste and water quality deterioration, and achieve the effect of improving water quality deterioration

Inactive Publication Date: 2015-09-30
JIANGSU LIANFENG ENERGY EQUIP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a coke oven gas purification method supporting vacuum carbonate desulfurization, so

Method used

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Embodiment Construction

[0028] In this embodiment, a preferred coke oven gas purification and vacuum potassium carbonate desulfurization waste liquid recycling method is provided, which mainly includes the following steps and process conditions:

[0029] 1) Pass the unpurified raw gas into the primary cooler and spray it with ammonia water to cool down;

[0030] 2) The coke oven gas from the primary cooler is passed into the electric tar catcher to remove the tar mist;

[0031] 3) The coke oven gas coming out of the electric tar catcher is fed into the blower to raise the temperature;

[0032] 4), the coke oven gas coming out from the blower is passed into the pickling tower for deammonification;

[0033] 5) The coke oven gas coming out of the pickling tower is passed into the final cooling tower for cooling;

[0034] 6), the coke oven gas coming out from the final cooling tower is passed into the naphthalene washing tower to remove naphthalene with absorbent;

[0035] 7) The coke oven gas from th...

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Abstract

The invention relates to a method for purifying coke oven gas by removing sulfur by virtue of a vacuum carbonate method. According to the method, purified coke oven gas enters a desulfuration and decyanation system and is subjected to desulfuration and decyanation processes by virtue of the vacuum carbonate method; liquid waste which is subjected to desulfuration and decyanation is recycled, so that the phenomena of deterioration of water quality and wasting of resources are effectively improved.

Description

technical field [0001] The invention relates to a purification method of coke oven gas, in particular to a purification method of coke oven gas matched with vacuum carbonate desulfurization. Background technique [0002] As a by-product of coking, coke oven gas is widely used in power generation projects in the metallurgical industry due to its high calorific value. Vacuum potassium carbonate desulfurization is a wet desulfurization process, which is widely used in domestic coking plants because of its high desulfurization efficiency. This process uses potassium carbonate solution to directly absorb acid gases such as H2S and HCN in coke oven gas, and then uses NaOH solution to wash the gas twice to make the H2S content in the gas meet the requirements. The gas desulfurization tower is divided into two sections, the lower potassium carbonate absorption section and the upper sodium hydroxide alkali washing section. The coal gas first flows through the absorption section fro...

Claims

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Application Information

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IPC IPC(8): C10K1/00C10K1/04C10K1/08C10K1/10C10K1/16C01C3/12
CPCC10K1/002C01C3/12C10K1/00C10K1/004C10K1/006C10K1/04C10K1/085C10K1/101C10K1/105C10K1/12C10K1/16
Inventor 张刘瑜李敬李占春
Owner JIANGSU LIANFENG ENERGY EQUIP
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