Waste sulfuric acid regeneration and reuse equipment

Based on the solubility of ferrous sulfate in sulfuric acid solution and the non volatile nature of sulfuric acid, a steam indirect heating and negative pressure evaporation concentration process is adopted. The waste sulfuric acid solution is evaporated and concentrated to reach a certain concentration of sulfuric acid. The concentrated solution is cooled to precipitate ferrous sulfate in the form of crystals, and then solid-liquid separation is carried out to obtain ferrous sulfate crystals and regenerated sulfuric acid containing a small amount of ferrous sulfate.

Graphite purification mixed acid regeneration and reuse equipment

In the manufacturing process of high-purity graphite as a negative electrode material for batteries, a mixed acid composed of hydrochloric acid, nitric acid, and hydrofluoric acid is used for surface pickling to remove impurities from the graphite. As the pickling time increases, the concentration of various ions in the pickling solution also increases, while the acid concentration decreases and the cleaning effect decreases.

Quartz sand refining mixed acid regeneration and reuse equipment

Quartz sand is widely used in various chemical industries such as water treatment and new building materials. In addition to its main component silicon dioxide, quartz sand also contains iron oxide, clay, mica, and organic impurities. The surface of natural quartz ore generally has a layer of molten iron to form a film. Compared with some fine industries that have strict requirements for iron content, when using quartz sand in production, acid washing is necessary to reduce the iron content in quartz sand.

Glass thinning mixed acid regeneration and reuse equipment

During the process of glass thinning, high concentration fluorine-containing waste acid will be generated. Fluorinated waste acid contains HF, HSiF6, HC1, water-soluble fluorosilicates, water-soluble fluoroaluminates, water-soluble fluoroborate, and trace amounts of solid suspended solids.

Diluted hydrochloric acid concentration equipment (23% -31%)

This process uses negative pressure evaporation+salt desorption for concentration. The evaporation desorption process is based on the theory of salt effect, adopting the method of adding salt evaporation desorption. Inorganic salts are added to the dilute hydrochloric acid solution that needs to be evaporated to change the relative volatility of the components and disrupt the constant boiling composition of hydrochloric acid and water.

Diluted sulfuric acid concentration equipment

The waste sulfuric acid first enters the filtration system to remove impurities. After impurity removal, the dilute sulfuric acid enters the gas-liquid separator from the metering tank. After reaching a certain capacity, it enters the evaporator for steam heating. The gas evaporated through gas-liquid separation in the separator is condensed through the condenser and then enters the weak acid water collection tank. Due to the vacuum effect, it can prevent the material from adhering to the inner wall of the heating tube. After the waste sulfuric acid reaches the required concentration through evaporation, it is collected and enters the automatic acid preparation system. After concentration adjustment, it is prepared to the required concentration and reused for production.