Treatment system for waste lead-acid storage battery electrolyte

Abstract

The invention discloses a treatment system for a waste lead-acid storage battery electrolyte. The system comprises a pressure filter for removing broken impurities and large particulate matters in theelectrolyte; the electrolyte is preheated through a preheater; the electrolyte enters triple-effect evaporation after being preheated by the preheater, and the concentration of an acid solution is increased to 50% from about 20% after the electrolyte is subjected to the triple-effect evaporation; the electrolyte enters a multiple-effect evaporator after being subjected to the triple-effect evaporation, and the concentration of the acid solution is increased to 70% from 50% after multiple-effect evaporation; after the electrolyte is subjected to the multiple-effect evaporation for increasing the concentration, a centrifugal machine performs centrifugal desalting; the treated electrolyte returns to a buffer tank again to carry out the next procedure of concentration increasing evaporation;acid becomes industrial sulfuric acid by increasing the acid concentration from 70+/-2% after being treated with a concentration increasing evaporator; and crystal substances separated twice through the centrifugal machine are conveyed to a crystal substance storage tank. The boiling point of the sulfuric acid in a negative pressure state is reduced, so that the steam energy consumption can be reduced and the production cost can be reduced; and meanwhile, the sulfuric acid can become the industrial acid by increasing the concentration from 20-50% through the multiple-effect evaporation, so that the utilization value of the sulfuric acid is improved.

Description

technical field [0001] The invention relates to the field of electrolyte treatment, in particular to a treatment system for the electrolyte of waste lead-acid batteries. Background technique [0002] my country has become the country with the largest production and use of lead-acid batteries in the world. The output of lead-acid batteries in my country accounts for 1 / 3 of the world's output, and at this stage, the annual scrap of lead-acid batteries in my country has reached more than 2 million tons. The electrolyte in lead-acid batteries accounts for about 20-25%. Most of the acid will be deposited during the dismantling process of waste lead-acid batteries. If it is not handled properly or dumped randomly, it will seriously pollute the soil and water sources, and directly endanger the human body. healthy. [0003] At the same time, because the concentration of the electrolyte is low, it has no direct use value; because of its harmfulness, it cannot be discharged at will....

AI Technical Summary

Problems solved by technology

[0004] Although the CN107670315A technology is a sulfuric acid concentration technology, it cannot guarantee the smooth operation of the system due to the many impurities and heavy metal ions contained in the

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