Submersible flow electrode capacitive deionization device and method

Abstract

The device comprises an electrode module, and the electrode module comprises an anode plate and a cathode plate; the anode plate and the cathode plate are oppositely arranged, and the distance between the anode plate and the cathode plate is adjustable; each of the anode plate and the cathode plate comprises a shell and a current collector, and the current collectors are embedded in the side faces, close to adjacent polar plates, of the shells; the current collectors in the anode plate and the cathode plate are respectively connected with the positive electrode and the negative electrode of a power supply through wires; an electrode liquid flow channel and an ion exchange membrane tightly covering the electrode liquid flow channel are arranged on the side surface, close to the adjacent polar plates, of the current collector; and an electrode liquid flow inlet and an electrode liquid flow outlet are formed in the shell and the current collector. The device is simple in structure and convenient and fast to assemble, the blocking risk of the device caused by insoluble substances in a solution is effectively avoided, and the later operation and maintenance cost is saved.

Description

technical field [0001] The invention relates to the technical field of electrosorption, in particular to a submerged flow electrode capacitive deionization device and method. Background technique [0002] At present, the main desalination technologies at home and abroad include thermal distillation, chemical method, membrane method and electrochemical method, etc., except for chemical method, they are all physical separation methods. The chemical method is simple and efficient, but it needs to consume a lot of acid, alkali, etc. when regenerating salty sludge, which inevitably causes multi-stage pollution. The thermal distillation method needs to input a large amount of heat energy, its investment and operation costs are high, and its industry adaptability is narrow, so it is not suitable for decentralized and large-scale applications. Pressure-driven membrane filtration methods include nanofiltration, ultrafiltration, reverse osmosis, etc. The effluent quality is better, b...

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Problems solved by technology

However, the water flow cavity of the conventional FCDI device is a sealed structure, which is inconvenient to assemble, which will bring about maintenance and greatly increase the cost of use.

In addition, no matter seawater, brackish water and sewage desalination and metal resource recovery, or ion enrichment and separation in the food and hygiene industries, it is inevitable to face the insoluble matter in the solution, the water flow chamber and the conventional FCDI device The water delivery system faces the risk of clogging, affecting treatment efficiency

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