Acid adding device for reducing electrolytic production reduction caused by hydrochloric acid leakage

Abstract

The invention provides an acid adding device for reducing electrolytic production reduction caused by hydrochloric acid leakage. The acid adding device comprises a hydrochloric acid pipeline, a pure water pipeline, a mixing pipeline and electrolytic cells; the hydrochloric acid pipeline is provided with a hydrochloric acid flowmeter and a flow regulating valve; the pure water pipeline is providedwith a flowmeter; the hydrochloric acid pipeline and the pure water pipeline are both connected with the mixing pipeline; the mixing pipeline is provided with a mixer; the tail end of the mixing pipeline is sequentially connected with a first-position electrolytic cell, a plurality of middle electrolytic cells and a final-position electrolytic cell; the acid adding device is further provided withan auxiliary mixing pipeline which is connected with the mixing pipeline in parallel, and the auxiliary mixing pipeline is connected with the final-position electrolytic cell, so that the auxiliary mixing pipeline is in butt joint with the tail end of the mixing pipeline; the auxiliary mixing pipeline is provided with an auxiliary mixer; and a hydrochloric acid main pipe between every two adjacentelectrolytic cells is provided with a manual valve. According to the invention, an annular hydrochloric acid pipeline is formed by the auxiliary mixing pipeline and the mixing pipeline, and when a certain point of the main pipe between two electrolytic cells is leaked, acid is added to the electrolytic cells from a front direction and a back direction to guarantee the production load, so that influence on the yield of the electrolytic cell is reduced.

Description

technical field [0001] The invention belongs to the process of adding hydrochloric acid to the anode of an electrolytic cell, and in particular relates to an annular acid adding device which reduces the influence of hydrochloric acid leakage on electrolysis output. Background technique [0002] At present, the addition of hydrochloric acid in the electrolysis process of caustic soda production is single and fixed. Due to the high corrosiveness of hydrochloric acid, the leakage of hydrochloric acid pipelines occurs frequently. If the hydrochloric acid main pipe between the electrolyzers leaks, it is necessary to adjust the load of all electrolyzers at the same time, stop adding acid to the electrolyzers, and create maintenance conditions for maintenance. The arrangement of this pipeline not only affects the output of caustic soda but also is unfavorable for the stable operation of the electrolyzer. Contents of the invention [0003] The invention aims to solve the problem ...

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Problems solved by technology

[0003] The invention aims to solve the problem that the leakage of hydrochloric acid pipeline affects the production load of the electrolytic cell, and provides a device that realizes the need for maintenance without affecting the production load of the electrolytic cell

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