Electrolysis unit for efficiently recovering heavy metal ions

Abstract

The invention discloses an electrolysis unit for efficiently recovering heavy metal ions, which comprises an electrolytic cell, a cathode, a cathode anchor, an anode, an anion exchange membrane module, a deionization inlet pipe, an anolyte outlet pipe, a catholyte outlet, an extract (electrolyte) storage tank and a high pressure pump. The cell body takes the shape of a cylinder, and the bottom takes the shape of a taper and is provided with a metal powder storing hopper. The cathode and the anion exchange membrane module are distributed in a concentric circle; the anode is arranged in the center of the electrolytic cell and enclosed by the anion exchange membrane module, thus forming an anode chamber; the periphery of the anion exchange membrane module, and the cathode and the inner side of the electrolytic cell form a cathode chamber. The cathode is a multidimensional net structure consisting of stainless steel wires and is supported by the cathode anchor (a back washing system) consisting of PVC pipes. The whole device adopts an online detection device for controlling the treatment and discharging of liquid containing heavy metal and can realize the automation of the electrolytic process.

Description

technical field [0001] The present invention relates to an electrolytic recovery device for heavy metal ions, more precisely, relates to an electro-wet metallurgy device for recovering heavy metal ions and acetic acid / citric acid in the acetic acid / citric acid extract of municipal solid waste incinerator fly ash . Background technique [0002] The heavy metals in the fly ash of municipal solid waste incinerators are extremely harmful to the environment. Because the fly ash contains heavy metals such as lead, mercury, chromium, silver, cadmium, copper, manganese, tin, zinc, arsenic, etc., it is clearly designated as hazardous waste by the national standard (GB 18485-2001), and must be treated before final disposal. stabilization treatment. Heavy metals usually exist in the form of oxides. If not treated, they will enter the environment, enter the ecosystem with the ingestion of organisms, gather in the human food chain, and finally enter the human body, causing chronic poi...

AI Technical Summary

Problems solved by technology

However, the cathode of this type of electrolysis device is mostly a two-dimensional flat plate structure, and the metal electrolytic deposition area of ​​a single group of electrodes is small, resulting in low electrolysis efficiency and high energy consumption; while the electrolysis device composed of multiple sets of diaphragms and cathode and anode electrodes has a large tank volume. High manufacturing cost and complex operation and maintenance; generally, this type of device requires a high concentration of heavy metal ions in the wastewater, and the wastewater needs to be concentrated before electrolysis

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