How is waste acid handled domestically?
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Now, waste acid is classified as hazardous waste. How is waste acid handled in China? Including waste hydrochloric acid and waste sulfuric acid.
At present, the fate of most waste acids is unknown.
A high-temperature pyrolysis regeneration process should be employed.
Different industries employ different approaches; the vast majority fail to address the issue of direct illegal discharge, or they transfer such pollutants into water bodies under the guise of water purifiers or reagents. Some companies use neutralization treatment, as well as processes such as MVR concentration and high-temperature pyrolysis for treatment.
Diffusion dialysis for concentration and purification, followed by evaporation
High-temperature cracking of spent sulfuric acid, followed by conversion and absorption to produce new acid for recycling
This post was last edited by txglyl on 2017-3-3 22:43. Acid production is carried out through high-temperature pyrolysis using a boiling furnace made from pyrite. Pyrolysis using a furnace for burning sulfur is also possible.
1: For the downstream process, the waste acid must first be pre-treated. 2: Hazardous waste treatment. 3. Pyrolysis of high-concentration waste acid. 4. Concentration of dilute sulfuric acid. 5. Exclusion, pulling out, delivery. 6. Digest it on your own; if digestion is problematic, stop production for rectification.
A lot of what is said is irresponsible; how could there be so much illegal discharge? Nowadays, the general public also has a strong awareness of environmental protection; go ahead and try spying on them! ! The treatment of waste acid depends on its concentration as well as the heavy metal components it contains; different processes are then used for treatment, primarily to remove the heavy metals followed by neutralization. The residue resulting from neutralization is treated as solid waste and further processed into gypsum, which can be used as an additive in cement. There are established processes for recovering arsenic and mercury from such waste. But who currently has a mature process for producing thallium?