Heavy metal zero discharge treatment system, heavy metal wastewater recovery and treatment zero discharge equipment. Heavy metal wastewater mainly comes from the wastewater discharged by enterprises such as mining, smelting, electrolysis, electroplating, pesticides, pharmaceuticals, paints, and pigments. If chemical wastewater is not treated, it will seriously pollute the environment. The types, contents and existence forms of heavy metals in the medium vary with different production enterprises. The removal of heavy metals is quite important in wastewater treatment.
Since heavy metals cannot be decomposed or destroyed, but only their existence locations can be transferred and their physical and chemical forms can be transformed, the effect of waste gas treatment can be achieved, and the purpose of removing heavy metals can be reached. For instance, in the process of waste gas treatment and wastewater treatment in Tong 'an, after chemical precipitation treatment, the heavy metals in the wastewater change from dissolved ionic forms to insoluble compounds and precipitate down, transferring from the water to the sludge. After ion exchange treatment, heavy metal ions in the wastewater are transferred to the ion exchange resin. After regeneration, they are transferred from the ion exchange resin to the waste liquid. After years of efforts, Xi 'an Huanke Water Treatment Co., Ltd. has successfully developed a stainless steel pipe pickling acid-containing wastewater reuse treatment equipment. The working principle is as follows: By taking advantage of the acid resistance characteristics of ion exchange resin, the waste acid in the waste liquid is adsorbed on the resin, and other metal salts pass through smoothly. Then, pure water is used to desorb the resin to recover the acid. Ion exchange resins are used to adsorb strong acids, remove metal salts from solutions, and separate free acids and heavy metal ions. In the later stage, the sewage purification device can achieve zero discharge, significantly reducing the cost of wastewater discharge.
Features of this equipment: It has a wide range of applications and is easy to operate. It has a large processing capacity and high cost performance (compared with membrane acid recovery equipment), and can be selected according to water quality and quantity requirements. The high adjustability avoids waste of funds. The equipment has a long service life and a low maintenance rate. Regeneration at room temperature with low energy consumption; Both ，，，， and the mixed acid can be purified and recovered. The concentration of purified and recovered acid is high, and the recycling and utilization reduce the production cost. The separation of acids and metal salts is conducive to the recovery of metal salts. After being treated by purification and recovery equipment, the waste pickling solution can achieve zero discharge of wastewater. Cleaning and chemical production, energy conservation and emission reduction, green and environmentally friendly equipment. The processing capacity of individual equipment is 5- 30 m ³ /d. The external dimensions are 1000×2000×1200mm. The acid recovery rate is 85- 90%, and the entire set of acid recovery equipment can achieve zero discharge. Scope of application: Hydrometallurgy, acid production, electroplating, automobile manufacturing and other mechanical processing industries.
