Sour tar deodorization method

Abstract

The invention discloses a method for removing odour of acid tar. The method comprises a step of stirring and mixing uniformly slaked lime and acid tar in a stainless steel reaction tank, in which the weight ratio of the slaked lime and the acid tar is 1:8-1:10; a step of pumping gas after reaction into a washing tower by using a blower, and discharging the gas after coal tar washing oil absorption; a step of allowing the acid tar and the slaked lime after reaction to stand for 0.4-0.6h to solidify the acid tar; and a step of smashing the solidified acid tar into particles having a particle size less than 3mm by using a hammer crusher, and sending the particles back to a coal blending belt to be re-blended. According to the method, the powder-form slaked lime is added into the acid tar as a solidifying and deodorizing agent, and therefore bad odor of the acid tar is removed and the acid tar is solidified. After being smashed, the solidified acid tar can be easily re-blended into coking coal and used for coking, and therefore problems, of the acid tar, comprising corrosion to equipment, belt adhesion, re-blending difficulty, and environment pollution are solved. The method provided by the invention is suitable for popularization and application in coking industry.

Description

technical field [0001] The invention relates to a deodorization method, in particular to a sour tar deodorization method. Background technique [0002] Acid tar produced in the production process of ammonium sulfate and refined benzene units in the coking plant is a kind of pollutant, which seriously pollutes the environment and has plagued the coking plant for a long time. There are usually two treatment methods. One treatment method is to mix acid tar back into coking coal for coking treatment. Because acid tar not only has an unpleasant smell, but also has strong acidity and is easy to corrode equipment. It has a high viscosity and often sticks to the belt. Moreover, there is also the problem of difficult back-mixing operation, and most coking plants no longer use this method. Another treatment method is to directly carry out deep burial treatment of acid tar, which will cause great pollution to the environment and groundwater sources. Contents of the invention [000...

AI Technical Summary

Problems solved by technology

There are usually two treatment methods. One treatment method is to mix acid tar back into coking coal for coking treatment. Because acid tar not only has an unpleasant smell, but also has strong acidity and is easy to corrode equipment. It has a high viscosity and often sticks to the belt. Moreover, there is also the problem of difficult back-mixing operation, and most coking plants no longer use this method

Another treatment method is to directly bury the acid tar, which will cause great pollution to the environment and groundwater sources.