Selection of pumps for pickling wastewater

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Pickling wastewater is wastewater produced when steel plants or electroplating plants use acids such as sulfuric acid, nitric acid, hydrochloric acid, and HF to remove oxides from metal surfaces. The pH value is generally below 1.5 (free acid 0.5-2%), which is strongly acidic. Because iron oxide scale or other impurities are produced during the pickling process, the pickling wastewater contains a certain amount of particles with varying sizes. This requires the pump to be acid-resistant and wear-resistant. A fluoroplastic self-priming pump is used. However, this type of pump can only transport media with physical properties similar to water. It has a short service life when transporting wastewater containing particles. The mechanical seal is prone to leakage, and the lift generally does not exceed 30m. Therefore, you can choose an acid-resistant ceramic mortar pump. This pump is made of chemical ceramics with excellent wear resistance and is protected by external cast iron armor. The impeller material is mainly UHPE engineering plastics and chemical ceramics. Impellers of other materials can also be used according to user needs. The shaft seal includes dynamic seals, mechanical seals, etc. It has the characteristics of corrosion resistance, wear resistance, easy maintenance, reliable application, long life, and good economy. It is suitable for transporting various corrosive media containing a large amount of solid particles except HF and concentrated alkali liquid.