Evaporation technique for liquid sulfur trioxide

Abstract

The invention relates to an evaporation technique for liquid sulfur trioxide and belongs to the technical field of chemical industry production. The invention aims to provide an improvement of an evaporation technique for liquid sulfur trioxide, and the working procedure has the characteristics of reasonable technological process and safe production and can fully utilize waste heat of various tail gases. The technique of the invention has the technical scheme that the liquid sulfur trioxide flows through a first pipeline between a liquid sulfur trioxide storage tank and a sulfur trioxide evaporator and is quantitively conveyed to the upper part of the sulfur trioxide evaporator, so that the liquid sulfur trioxide flows down along with a filling material through a distributor in an evaporation mixer; dry gas conveyed through a second pipeline enters the lower part of the sulfur trioxide evaporator after being orderly pressurized and heated, so that the dry gas rises in the sulfur trioxide evaporator and meets the liquid sulfur trioxide in reverse directions, and the liquid sulfur trioxide is evaporated by heating and diluted into gas with certain concentration; and the produced sulfur trioxide gas flows in a cooler through a third pipeline to be cooled, and is absorbed by an absorption tower for later use.

Description

technical field [0001] The invention relates to an evaporation process of liquid sulfur trioxide, which belongs to the technical field of chemical production. Background technique [0002] In the field of industrial and civil surfactants, sulfur trioxide (SO 3 ) sulfonation technology is the basic production process for producing anionic surfactant sulfonated products and sulfated products. Its products are widely used in the preparation of detergents, toothpaste, cosmetics and other civilian products, and are also widely used in industrial fields such as oil extraction, mineral processing, metal cutting, pesticides, textiles, printing and dyeing, and leather. Traditional SO 3 Occurrence usually adopts the sulfur combustion method, that is, the sulfur combustion method is used to obtain SO 2 It is converted into sulfur trioxide by catalytic catalyst, and mixed with dry air to obtain a mixed gas of sulfur trioxide / air for sulfonation. This is roughly the same as the one-t...

AI Technical Summary

Problems solved by technology

[0004] Although the appeal process is simple and easy to implement, it has obvious disadvantages, and there is a certain degree of potential danger in the operation process: 100% gaseous SO stored in the pipeline and equipment from the sulfur trioxide storage tank to the gasifier in the device 3 will convert to a liquid and then to a solid, which can cause a blockage in the line

At the same time, equipment maintenance and cleaning work is difficult and dangerous

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