Method for reducing chlorine loss in liquid chlorine unloading process

Abstract

The invention discloses a method for reducing the chlorine loss in a liquid chlorine unloading process. The method comprises the following steps of sequentially connecting a liquid chlorine tank car loaded with liquid chlorine with an unloading pipeline and a liquid chlorine storing tank, opening a gas valve of the liquid chlorine tank car, pressurizing a storage tank on the liquid chlorine tank car to ensure that the pressure of the storage tank of the tank car is higher than that of the liquid chlorine storing tank, opening a pressure relief pipeline valve between the liquid chlorine storing tank and a production network at the same time, opening a liquid valve of the liquid chlorine tank car and an inlet valve of the liquid chlorine storing tank and starting unloading till the unloading is completed. The method disclosed by the invention has the advantages that the liquid chlorine unloading safety is guaranteed and the chlorine produced in a pressure relief process of the storage tank in the liquid chlorine unloading process is also recovered, so that the consumption of large and medium raw and auxiliary materials in a production process is reduced and the production operating cost is reduced.

Description

technical field [0001] The invention relates to the technical field of chlorination, and more specifically relates to a method for reducing chlorine loss during liquid chlorine unloading. Background technique [0002] During the liquid chlorine unloading process, because the saturated vapor pressure of chlorine gas is 506.62kPa (10.3°C), but the ambient temperature is usually higher than 10.3°C, and the liquid chlorine will absorb heat during the liquid chlorine transportation and unloading process, so the unloading into the liquid chlorine The liquid chlorine temperature in the chlorine storage tank is usually higher than 10.3°C, which will cause part of the liquid chlorine to gasify to produce chlorine gas. Usually, the gasified chlorine gas is sent to a special tail gas treatment system through the pressure relief pipeline for treatment, such as using NaOH solution spray absorption for treatment, which not only has a greater safety risk, but also wastes chlorine gas, NaOH...

AI Technical Summary

Problems solved by technology

Usually, the gasified chlorine gas is sent to a special tail gas treatment system through the pressure relief pipeline for treatment, such as using NaOH solution spray absorption for treatment, which not only has a greater safety risk, but also wastes chlorine gas, NaOH solution and increases related running processing cost