Electric desalting, dewatering and deslagging method for coal tar

Abstract

The invention discloses an electric desalting, dewatering and deslagging method for coal tar, which is suitable for deep desalting, dewatering and impurity-removing treatment of high-temperature coal tar, medium-temperature coal tar and low-temperature coal tar. The method comprises the following steps: adding a sodium carbonate solution with the concentration of 5%-10% into the coal tar, increasing the temperature to 100-120 DEG C to form a stable sodium salt, filtering the coal tar twice, enabling the particle size of mechanical impurities to be not more than 15 mu m, heating the coal tar to 110 DEG C-150 DEG C and injecting water accounting for 5%-10% of the total weight of the coal tar, wherein the water is of softened water or purified water with the pH value of 5-11; and adding an emulsion breaking agent accounting for 0-100 mu g / g of the total weight of the coal tar, mixing, and then performing desalting, dewatering and deslagging in a high-voltage electric field to get the purified coal tar meeting the follow-up processing requirements.

Description

technical field [0001] The invention belongs to the technical field of pretreatment of coal tar deep processing, in particular to a method for electric desalination, dehydration and slag removal of coal tar, which can be widely used in coal tar pretreatment of coal chemical enterprises and other enterprises. technical background [0002] At present, the proven crude oil is about 1150 billion barrels. Although this is an increase of 10% compared with the estimated figure of the previous two years, based on the current mining speed, the oil reserves on the earth are only enough to meet the needs of the world's oil consumption for 41 years. The shortage of oil resources has become a constraint on my country's economic development. one of the key factors. However, coal reserves are very abundant, so coal-to-oil is a way to solve vehicle fuel oil products. The main technologies of coal-to-oil include direct liquefaction of coal and indirect liquefaction of coal, etc., but these t...

AI Technical Summary

Problems solved by technology

Although this is an increase of 10% compared with the estimated figure of the previous two years, based on the current mining speed, the oil reserves on the earth are only enough to meet the needs of the world's oil consumption for 41 years. The shortage of oil resources has become a constraint on my country's economic development. one of the key factors

However, the storage of coal is very abundant, so coal-to-oil is a way to solve the problem of vehicle fuel oil. The main technologies of coal-to-oil include direct liquefaction of coal and indirect liquefaction of coal, etc., but these technologies are costly. technical complexity