The role of waste acid treatment equipment in steel pipe plant
2020-11-02
Waste acid is far more harmful to groundwater than ordinary chemical wastewater. When it penetrates into the ground, it will also react with carbonates, sulfites and sulfides in rocks and soil to produce harmful gases, such as hydrogen sulfide. These harmful gases are discharged into the air and pollute the atmosphere. Therefore, China has strict requirements for the treatment of waste acid, and different penalties and discharge standards have been formulated throughout the country.
Waste acid treatment equipment in steel pipe plantThe metal resources in the phosphating solution are fully recovered, the process is more reasonable, there is no secondary pollution, and the economic benefit is high. However, there are many problems in the comprehensive utilization process of domestic waste phosphating solution, such as metal resources can not be recycled, secondary hazardous waste, heavy metal pollution residues in products, etc.
Waste acid treatment equipment in steel pipe plantWaste acids in the surface treatment industry contain a large number of resources such as copper, nickel and cobalt. Many domestic enterprises use chemical conversion methods to prepare copper, basic copper carbonate, basic nickel carbonate, nickel and oxidation. Nickel, cobalt oxide and cobalt oxalate products; At the same time, the waste acid solution that meets the standard can be used for the acid leaching treatment of industrial sludge containing copper (nickel) sludge, and can also be used to prepare corresponding chemicals.
Acid and alkali wastewater is highly corrosive and requires proper treatment to be discharged.Waste acid treatment equipment in steel pipe plantThe general method of treating acid and alkali wastewater is: high concentration acid and alkali wastewater. Plating plants and mines, etc. contain various harmful substances or heavy metal salts. The mass fraction of acid varies greatly, with low values less than 1% and high values greater than 10%.
Alkaline wastewater mainly comes from various production plants, etc., and some of them contain organic alkali or inorganic alkali. on the one hand,Waste acid treatment equipment in steel pipe plantThe resulting sodium chloride acts as a strong dielectric, disrupting the ionization equilibrium of the emulsion and having a demulsification effect. On the other hand, it increases the density of the aqueous phase, reduces the dissolution or suspension of organic matter in the aqueous phase, and improves the separation effect.
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