Continuous sulfur adding device and continuous sulfur adding process for thionyl chloride rectification systems

Abstract

The invention provides a continuous sulfur adding device and a continuous sulfur adding process for thionyl chloride rectification systems. The continuous sulfur adding device comprises a sulfur melting and liquid sulfur delivering system, a rectification system and a liquid sulfur blending reflux system. The sulfur melting and liquid sulfur delivering system comprises a sulfur melting tank and aliquid sulfur buffer tank which are communicated with each other; the rectification system comprises a first rectification tower; the liquid sulfur blending reflux system comprises a reflux tank; theliquid sulfur buffer tank is communicated with the reflux tank, and the reflux tank is communicated with a tower top of the first rectification tower. The continuous sulfur adding device and the continuous sulfur adding process have the advantages that the continuous sulfur adding process is easy to control, low in equipment investment and convenient to popularize, the sulfur dichloride and chlorine conversion rate can be effectively increased, rectification and separation effects can be enhanced, operational risks of staffs can be reduced to a great extent, and workload on the staffs can be relieved to a great extent.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering processes, and in particular relates to a continuous sulfur addition device and process for a sulfur oxychloride rectification system. Background technique [0002] The first rectification tower in the rectification system of thionyl chloride is a heavy component removal tower, and the main separation task is to remove the heavy component sulfur monochloride in the crude thionyl chloride. At the same time, it is necessary to set a sulfur passer (or sulfur pass section) at the top of the tower, and add solid sulfur into the passurizer to convert the light components of sulfur dichloride and chlorine into the heavy components of sulfur monochloride that are easy to separate. With the continuous consumption of solid sulfur in the oversulfurizer, the conversion rate of sulfur dichloride and chlorine will gradually decrease, and there will be uneven distribution of sulfur, causing the gas ...

AI Technical Summary

Problems solved by technology

With the continuous consumption of solid sulfur in the oversulfurizer, the conversion rate of sulfur dichloride and chlorine will gradually decrease, and there will be uneven distribution of sulfur, causing the gas phase at the top of the tower to drift in the oversulfurizer. The above problems will lead to The impurity content in the distillate exceeds the standard, which affects the separation effect, so it is necessary to replenish solid sulfur regularly

[0003] The above-mentioned intermittent sulfur addition system has the following problems: (1) The pressure of the rectification system will be destroyed when the solid sulfur is regularly replenished, and the rectification tower needs a period of time to re-establish the gas-liquid balance, which seriously affects the production efficiency; (2) The sulfur input port is located at the first The upper part of a rectification tower needs to be manually hoisted and transported to the position of the discharge port. The operator is in a high-altitude working environment, and there is a potential risk of lifting injury and falling from a high place; (3) It is necessary to regularly observe the sulfur consumption in the sulfur filter and replenish it in time , the workload of workers' inspection and operation is heavy

Images