Process for recovering heavy metal ions in lead-acid storage battery sewage

Abstract

The invention discloses a recovery process of heavy metal ions in lead-acid storage battery sewage, and relates to the technical field of sewage treatment.The specific process comprises the following steps that sewage is guided into a treatment pond containing a heavy metal adsorbent for multi-stage sedimentation, and then sediment at the bottom of the pond is dried and ground into powder; and the wastewater is conveyed into a recovery tank of a high-voltage power supply through an air blower and can be settled in different areas under an electric field, so that the heavy metal ions in the wastewater are recovered. According to the invention, sewage is introduced into a treatment pool containing a heavy metal adsorbent for multistage sedimentation, then sediments at the bottom of the pool are dried and ground into powder, the powder is sent to a recovery tank of a high-voltage power supply through an air blower, and sedimentation in different areas is generated by utilizing the fact that charged substances and uncharged substances can move in different tracks under an electric field. Therefore, the heavy metal adsorbent adsorbing the heavy metal in the precipitate can be separated from other impurities, and the purpose of recycling the heavy metal is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a recovery process for heavy metal ions in lead-acid storage battery sewage. Background technique [0002] The application fields of lead-acid batteries are very wide, so they are widely welcomed. The most characteristic of lead-acid batteries is that they do not consume earth resources. This advantage is applied by all walks of life, and the market demand for lead-acid batteries continues to increase. However, the large-scale development of lead-acid batteries also causes certain environmental pollution. Therefore, higher requirements are put forward for the pollution prevention and control of the lead-acid battery industry. A large amount of production sewage is formed in lead-acid battery production enterprises, and the main pollutant in the sewage is lead. Lead, as a class of pollutant, is carcinogenic to many tissues and systems of the human body. The d...

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Problems solved by technology

The advantage of the precipitation method is that the equipment is simple and easy to operate, but the disadvantage is that it is not suitable for low-concentration wastewater; the advantage of the electrolysis method is that it has no secondary pollution and can realize the reuse of lead, but the disadvantage is that it consumes a lot of energy and costs; the advantage of the adsorption method is that the source of raw materials is wide , the disadvantage is that it is difficult to recycle; the advantages of the ion exchange method are small footprint, convenient management, no secondary pollution, and recyclable lead; the disadvantage is that the reaction cycle is long and the operating cost is high; the advantages of the membrane separation method are simple equipment, convenient operation and high efficiency Energy saving, the disadvantage is high cost, and the membrane is easily polluted and damaged; the advantage of biological method is that the construction and maintenance costs are low, but the disadvantage is that it occupies a large area, the treatment efficiency is unstable, and it is greatly affected by seasonal changes

Among the main lead-acid wastewater treatment methods currently used, the adsorption method, as a simple and easy-to-operate, low-cost treatment method, is widely applicable to small and medium-sized enterprises. biggest obstacle