High-purity chlorine gas rectifying technology and equipment thereof

Abstract

The invention relates to a high-purity chlorine gas rectifying technology. The technology comprises the following steps: delivering industrial liquid chlorine to a vaporizer, and sending vaporized chlorine into a first distillation tower under the pressure of 1.2 Mpa until the liquid level of the first distillation tower reach 85%; boosting the pressure of the first distillation tower to 1.0 Mpa, condensing the vaporized chlorine by a first condenser, then sending into a first reflux tank, and delivering 60% residue in the first reflux tank to a second distillation tower; enabling the liquid level of the first reflux tank to be 30% to 40%, and boosting the pressure of the second distillation tower to be 1.8 Mpa; back flowing residue condensed by a second condenser in to the second distillation tower, then sending into a third distillation tower, controlling the liquid level of the second distillation tower to be 60% to 75% until the liquid level of the third distillation tower reaches 85%, and boosting the pressure of the third distillation tower to be 1.5 Mpa; condensing by a third condenser, then sending into a third reflux tank until the purity reaches 99.9999%, enabling the liquid level of the third reflux tank to reach 60%, enabling the purity of the liquid chlorine in the third reflux tank to be 99.9999%, and obtaining high-purity chlorine gas. Through the adoption of the method, raw material input and product output can be carried out stably and continually, the production capacity can be improved, energy consumption can be reduced through continuous rectification, the running is stable, and the operation is safe.

Description

technical field [0001] The invention relates to a rectification process, in particular to a high-purity chlorine gas rectification process and equipment thereof, belonging to the technical field of high-purity chlorine gas production. Background technique [0002] Chlorine gas is one of the main products of the chlor-alkali industry and is a strong oxidant and chlorinating agent. High-purity chlorine gas is a high-purity gas obtained by purifying industrial liquid chlorine. It is used as standard gas and calibration gas. In addition, its applications include microelectronics, optical fiber cables, high-temperature superconductivity, high-performance alloy smelting, and related industries and basic sciences. Research and other cutting-edge technology fields. [0003] For a long time, my country's high-purity chlorine has been dependent on imports. In the 1980s and 1990s, my country only had high-purity chlorine produced by adsorption purification method, and its purity could...

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Problems solved by technology

The high-purity chlorine gas produced by the adsorption method needs to prepare desiccant and adsorbent that are not corroded by chlorine gas and do not chemically react with chlorine, and the selection of appropriate drying, adsorption, regeneration and condensation process conditions is a subject with great technical difficulty and a lot of research content. , the adsorption method equipment is simple, has certain limitations, and cannot meet the requirements of high output

[0004] The separation process of high-purity chlorine produced by condensation method is simple and can remove O 2 , N 2 , CO 2 , CO, H 2 、CH 4 Such as low boiling point impurities, but it is difficult to remove trace water in chlorine gas, and the water content in raw material chlorine is very strict, otherwise it will block, corrode equipment and pipelines, etc.

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