Two Treatment Methods of Waste Acid Treatment Equipment in Steel Pipe Plant
2020-08-14
Waste acid treatment equipment in steel pipe plantTwo ways of handling:
1. charged membrane method
The waste acid is recovered by the charged membrane method, and the whole equipment has a certain number of membranes to form structural units. The solution concentration on both sides of each structural unit membrane is different, and there is a certain concentration gradient, so that the solution on one side penetrates to the other side, that is, the waste acid penetrates to the water side. However, anion membranes are selectively permeable and do not allow every ion to pass through with equal opportunity.
First, the anionic membrane framework itself has a positive charge and has the property of attracting negatively charged hydrated ions and repelling positively charged hydrated ions in solution. Therefore, under the action of the concentration difference, the anions on the waste acid side are attracted and smoothly pass through the membrane pores. At the same time, according to the requirement of electrical neutrality, the positively charged ions will also be entrained.
Due to the small hydration radius of H, the charge is small; the hydrated ion radius of the metal salt is large and expensive, so H preferentially passes through the membrane, thereby separating the acid in the waste liquid. Due to the countercurrent operation, at the outlet of the waste liquid, although the acid concentration in the acid chamber is greatly reduced due to diffusion, it is still higher than the acid concentration in the introduced water. In addition, when the membrane is actually manufactured, the side group can be used to replace the control membrane, and the moisture and pore size can effectively separate the acid and salt.
2, oxidation method
Oxidation methods have been used for a long time,Waste acid treatment equipment in steel pipe plantThe principle is to oxidize and decompose the organic impurities in the waste sulfuric acid with an oxidizing agent under appropriate conditions, convert them into carbon dioxide, water, nitrogen oxides, etc., and separate them from the sulfuric acid, thereby purifying and recycling the waste sulfuric acid. Commonly used oxidants are hydrogen peroxide, nitric acid, hypochlorous acid, nitrate, ozone and so on.
Waste acid treatment equipment in steel pipe plantIt has a wide range of applications and is easy to operate; it has large processing power and high cost performance. It can be selected according to the water quantity and water quality requirements, and can be adjusted to avoid wasting funds. The equipment has a long service life and low maintenance rate; normal temperature regeneration, low energy consumption; the entire set of acid recovery equipment can achieve zero emissions.
If these waste acids are discharged directly into the environment without treatment, it will not only acidify the soil or water body, destroy the ecological environment, but also waste a lot of resources, so everyone must pay attention to the treatment of waste acids.
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