Dehydrogenation process of hydrogen chloride synthesis gas

Abstract

The invention discloses a dehydrogenation process of hydrogen chloride synthesis gas, which relates to the technical field of synthesis gas dehydrogenation, and comprises the following steps: constructing a dehydrogenation device, dissolving hydrogen chloride in water in a synthesis gas separation tank, introducing hydrogen recovered in a hydrogen recovery tank and oxygen in an oxygen tank into a combustion device, introducing a hydrochloric acid solution into a desorption tower, and adding a catalyst, the method comprises the following steps: collecting reaction heat generated by hydrogen combustion reaction into a heating jacket, heating a desorption tower by using the heating jacket, cooling hydrogen chloride gas separated out from the desorption tower by using a cooler, performing primary dehydration by using a demister, and performing multi-stage dehydration on the hydrogen chloride gas subjected to primary dehydration by using an adsorption column; hydrogen chloride gas and hydrogen are separated by using the synthesis gas separation tank, and heat released by reaction of the separated hydrogen and oxygen is used as a heat source in a hydrogen chloride solution desorption process, so that reasonable utilization of resources can be effectively realized; and the product water generated by the reaction of the hydrogen and the oxygen can be used as the dissolving water when the hydrogen chloride dissolving gas is dissolved in the synthesis gas separation tank.

Description

technical field [0001] The invention relates to the technical field of dehydrogenation of synthesis gas, in particular to a dehydrogenation process of hydrogen chloride synthesis gas. Background technique [0002] Hydrogen chloride gas is an important basic raw material and product in the chemical industry. It is used in food processing, textiles, medicine, etc. [0003] It is widely used in the industry, especially in the chlor-alkali chemical industry. Among them, hydrogen chloride can be produced by the combustion reaction of chlorine and hydrogen. The reaction formula is: Cl2+H2=2HCl+Q. It can be seen from the reaction formula that chlorine and hydrogen react to produce hydrogen chloride according to the molar ratio of 1:1. In the actual production process Excessive chlorine gas is more harmful. In order to fully burn chlorine gas, the volume flow rate of hydrogen gas is generally 5% to 10% higher than that of chlorine gas. Under the control of such a chlorine-hydrogen ...

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Problems solved by technology

[0004] But when the hydrogen is excessive, the excess hydrogen cannot participate in the combustion reaction, the flame is unstable and white, and a white mist airflow is generated at the burner nozzle of the synthesis furnace, resulting in a decrease in the purity of hydrogen chloride. Therefore, the removal of hydrogen in the hydrogen chloride synthesis gas can improve The purity of hydrogen chloride, the existing dehydrogenation process consumes a lot of energy, and the process has poor recyclability

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