Graded and continuous production device and technique of hydrochloric acid

Abstract

The invention discloses a graded and continuous production device of hydrochloric acid, which comprises a No. 1 gas-liquid separator, a No. 1 washing circulation groove, a No. 2 gas-liquid separator, a No. 2 washing circulation groove, a No. 1 hydrochloric acid storage tank, a No. 2 hydrochloric acid storage tank, an intermediate groove and an absorption tower, wherein the No. 1 gas-liquid separator is connected with the No.1 washing circulation groove, the No.1 washing circulation groove is connected with the No.2 washing circulation groove, and the No.2 washing circulation groove is connected with the No.1 hydrochloric acid storage tank; the No.2 washing circulation groove is also connected with the No.2 gas-liquid separator, the No.2 gas-liquid separator is connected with the intermediate groove, and the intermediate groove is connected with the absorption tower; the No.2 hydrochloric acid storage tank is connected with the No.2 gas-liquid separator; and the No.1 gas-liquid separator is also connected with the intermediate groove. The invention also discloses a technique of producing hydrochloric acid by the device. The graded and continuous production device of hydrochloric acid disclosed by the invention has the advantages of fully recycling high-sulfur diluted hydrochloric acid and systematically concentrating the same so as to guarantee the concentration effect by high-sulfur absorption as well as increasing the production of low-sulfur hydrochloric acid to the utmost.

Description

technical field [0001] The invention relates to a hydrochloric acid graded continuous production device and process. Background technique [0002] At present, in the production of domestic phosphate and compound fertilizer enterprises, in order to optimize the use of hydrogen chloride gas, most enterprises not only produce by-product hydrochloric acid, but also further use hydrogen chloride gas to produce chlorosulfonic acid; hydrochloric acid in the tail washing of chlorosulfonic acid production contains sulfate radicals High and low concentration, which cannot meet the concentration requirements of industrial hydrochloric acid. If an absorption device is added to the chlorosulfonic acid tail washing system to concentrate hydrochloric acid, the production cost will be increased, and the output of hydrochloric acid will be low; another kind of intermittent low-sulfur hydrochloric acid 1. In the production of high-sulfur hydrochloric acid, because the device system needs to b...

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Problems solved by technology

[0002] At present, in the production of domestic phosphate and compound fertilizer enterprises, in order to optimize the use of hydrogen chloride gas, most enterprises not only produce by-product hydrochloric acid, but also further use hydrogen chloride gas to produce chlorosulfonic acid; hydrochloric acid in the tail washing of chlorosulfonic acid production contains sulfate radicals High and low concentration, which cannot meet the concentration requirements of industrial hydrochloric acid. If an absorption device is added to the chlorosulfonic acid tail washing system to concentrate hydrochloric acid, the production cost will be increased, and the output of hydrochloric acid will be low; another kind of intermittent low-sulfur hydrochloric acid 1. Production of high-sulfur hydrochloric acid. Due to the need to replace the device system when producing low-sulfur hydrochloric acid, the output of low-sulfur hydrochloric acid is low and the production is uneconomical.

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