萤石-硫酸法制备无水氟化氢工艺中硫的脱除浅析

Analysis of Sulfur Removal in the Preparation of Anhydrous Hydrogen Fluoride by Fluorite Sulfuric Acid Method

现国内外普遍采用萤石—硫酸法工艺制备无水氟化氢。该工艺过程中会有硫蒸气产生,并且随着系统中温度的降低,硫蒸气会凝结集聚成固体形态,不断黏着在输送管道和生产设备中,引起输送管道和生产设备内壁发生严重的腐蚀反应,同时沉积的固体硫还会堵塞管道、设备,造成生产安全事故的发生,隐患很大。重点分析介绍萤石—硫酸法制备无水氟化氢工艺流程中硫元素的来源、硫单质产生的原因以及生产过程中硫单质的脱除问题。

The fluorite sulfuric acid process is widely used both domestically and internationally to prepare anhydrous hydrogen fluoride.During this process,sulfur vapor will be generated,and as the temperature in the system decreases,the sulfur vapor will condense and accumulate into a solid form,continuously sticking to the conveying pipelines and production equipment,causing serious corrosion reactions on the inner walls of the conveying pipelines and production equipment.At the same time,the deposited solid sulfur will also block the pipelines and equipment,causing production safety accidents and posing great hidden dangers.This article focuses on analyzing and introducing the sources of sulfur elements,the causes of sulfur elemental production,and the removal of sulfur elemental in the production process of anhydrous hydrogen fluoride prepared by fluorite sulfuric acid method.