Absorbent of naphthaline in coke oven gas and preparation method thereof

Abstract

The invention discloses an absorbent of naphthaline in coke oven gas and a preparation method thereof, which can economically and efficiently remove the naphthaline in the coke oven gas. The absorbent of the naphthaline in the coke oven gas has the following physical characteristics: the condensation point is minus 20 DEG C to minus 55 DEG C; the naphthaline solubility is 12.76 to 15.04 percent; the movement viscosity is 3.344 to 1.877 mm<2> / s; and the density is 0.88g / cm<3>. The chemical composition is the mixed alcohol, renewable oil, dispersing agent and surface active agent. The preparation method comprises the following steps of sequentially placing the mixed alcohol, the renewable oil, the dispersing agent and the surface active agent in a container to be stirred and mixed under the temperature of minus 30 DEG C and 40 DEG C, and discharging the mixture after being uniformly mixed to obtain the absorbent of the naphthaline in the coke oven gas. The absorbent is abundant in raw material resource and environment-friendly and clean; the naphthaline solubility of the absorbent is 50 percent higher than that of the diesel; the solution after the naphthaline is removed is recycled; and original naphthaline removing equipment is unnecessary to change, the absorbent can be directly mixed with the diesel to use and also can be used independently, and no technological restriction exists.

Description

technical field [0001] The invention relates to an absorbent for naphthalene in coke oven gas and a preparation method thereof. Background technique [0002] As we all know, the gas used in industrial production and people's daily life is coke oven gas produced by coking plants, which must be purified before it can be supplied to end users. Since unpurified coke oven gas contains a large number of impurities, naphthalene is the most abundant substance among these impurities. The naphthalene entrained in the gas will be precipitated from the gas as a solid and deposited on the gas pipeline or on the valve with the change of the gas temperature, flow velocity and flow rate, resulting in a smaller effective area of ​​the delivery pipe, an increase in the resistance of the gas delivery, and a decrease in the delivery volume , In severe cases, the pipeline will be blocked or the valve will fail to cause gas cut-off and stop production. Therefore, the removal of naphthalene is a...

AI Technical Summary

Problems solved by technology

At present, the solvent commonly used in the fine naphthalene removal process is diesel oil. The disadvantages of diesel oil solvent are: petroleum resources are limited, and the diesel oil after dissolving naphthalene cannot be regenerated due to the difficulty of separating naphthalene, resulting in waste of resources; diesel oil has limited ability to dissolve naphthalene, so it can be used as a gas purifier The efficiency of naphthalene removal is low, and the cost of naphthalene removal is relatively high

However, the naphthalene content in the gas is still 80g / m3 after naphthalene removal by this process 3 , so washing oil is generally used for initial naphthalene removal of coke oven gas, but not for naphthalene content less than 50-100mg / m 3 denaphthalene

Images