Hydrochloric acid concentration and regeneration equipment

Abstract

The invention relates to the technical field of hydrochloric acid concentration and regeneration, in particular to hydrochloric acid concentration and regeneration equipment which comprises a tank body, a feeding pipe, a mounting frame, a supporting frame and a discharging pipe, a sealing cover is movably mounted on the top wall of the feeding pipe, a valve is arranged on the discharging pipe, and a distillation box is fixedly mounted at the upper end in the tank body; a plurality of infrared heaters are uniformly and fixedly connected to the inner side wall of the distillation box, a heating inner container is fixedly mounted in the distillation box, and a stirring mechanism for accelerating separation of hydrochloric acid and impurities is arranged in the heating inner container. Waste hydrochloric acid is stirred through the stirring mechanism, so that the waste hydrochloric acid can be uniformly heated, evaporation of the waste hydrochloric acid is accelerated to form water vapor and hydrogen chloride gas, and ferrous chloride mixed in hydrochloric acid can form ferrous chloride crystals to be separated from hydrochloric acid; the stirring frame can scrape off ferrous chloride crystals on the inner side wall of the heating inner container in the rotating process, the situation that the ferrous chloride crystals are adsorbed on the heating inner container to affect the heat conduction effect can be avoided, and the distillation efficiency can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of hydrochloric acid concentration and regeneration, in particular to hydrochloric acid concentration and regeneration equipment. Background technique [0002] In the cold-rolling pickling factory, when using hydrochloric acid to pickle the steel plate, the iron oxide on the surface of the plate is washed off by hydrochloric acid to form ferrous chloride or ferric chloride is dissolved in the pickling solution. As the pickling process proceeds, the acid The concentration of ferrous chloride in the washing solution will increase, and the concentration of free HCl will decrease accordingly. In order to maintain the concentration of free HCl in the pickling solution and remove the increased ferrous chloride in the acid solution, the commonly used technology is to The waste acid liquid is quantitatively sent to the waste hydrochloric acid regeneration device to regenerate free acid and return to the pickling uni...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, although waste hydrochloric acid treatment equipment can recycle hydrochloric acid, there are still the following disadvantages: after recycling waste hydrochloric acid to obtain by-product iron oxide, ferrous chloride may still be mixed in the hydrochloric acid, thus causing waste hydrochloric acid treatment. Incomplete, failed to further effectively utilize waste hydrochloric acid

Images