Recycling is the output of the waste acid after the acid workshop is produced, and the acid concentration is low

2 thoughts on “Recycling is the output of the waste acid after the acid workshop is produced, and the acid concentration is low”

  1. In industrial production, waste acids are produced in the process of nitrification, esterization, sulfide, alkylated, catalytic and gas drying of organic matter, or produce in the process of titanium pink production, steel pickling and gas drying. my country has strict requirements for the treatment of waste acids, and there are different emission standards and punishment specifications across the country. Most of them are pH = 7 (ie neutral) as waste acid emissions standards. However, it has to be noticed that there is still a possibility of industrial waste acids that reach national and regional emission standards even after neutralization of acid -base and alkali. Therefore, technologies such as device distillation (post -treatment) and acid activists (online treatment) have a vital impact on the treatment of waste acid.

    The industrial waste acids have the following characteristics:

    1) Wide sources and decentralized industry, except for titanium pink, aromatics nitrification, dyes, petroleum processing, and steel pickles There are also dozens of other chemical products produced in the production of waste sulfuric acid;

    2) The total amount of waste sulfuric acid is large, but the amount of waste sulfuric acid produced by a single enterprise is not large, and the amount of waste sulfuric acid is higher than that of the amount of waste sulfur. There are fewer companies above 5 KT/A, and many companies have only a few hundred tons of waste sulfuric acid each year;

  2. Metals use a large amount of waste acid during the surface treatment. When the metal in the acid liquid reaches a certain concentration, the acid liquid needs to be reorganized and replaced because the treatment effect does not meet the process requirements. In this process, a large amount of waste acid liquid is produced. These waste acid liquids contain higher concentration acids and metals, causing certain threats to the environment, and need to be treated. The method of recycling and regeneration of waste acid washing solution is: heating and evaporation method, special resin exchange method and diffusion and diaphragm. kind. The heating and evaporation method has not matched with the rise of energy prices, and it is no longer in accordance with the development of science and technology. With the development of science and technology, the development of resin exchange method and diffusion and interpretation membrane method. The diffusion and interfering method has been commodized in Germany. Some domestic manufacturers are trying in a small number of domestic manufacturers. The maximum processing capacity of this equipment is 5m3/d. Due to small processing volume, short membrane life, easy aging and damaging, and excessive cost -effectiveness, restricting industry restrictions in the industry. Production and use. Resin intersection
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    The exchange method is to purify the waste acid washing fluid through the purification and recycling equipment, the acidion is blocked and adsorbed by the fillers, the metal ions penetrate the filler layer with the liquid, the acid is separated from the metal impurities, the amount of penetrating liquid is used, etc. The sour root of the water rinse, the regenerative acid that is roughly equal to the concentration of the waste acid washing solution can be used.

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