Double-membrane-chamber membrane capacitance desalination device with continuous water production capacity

Abstract

The invention discloses a double-membrane-chamber membrane capacitance desalination device with continuous water production capacity. According to of the structure of the device, a double-membrane-chamber membrane capacitance assembly is provided with two membrane chambers, graphite electrodes, an activated carbon fiber cloth, a cation exchange membrane, an anion exchange membrane and the like. Araw water tank is connected with a water inlet pump, an outlet of the water inlet pump is connected with the two membrane chambers of the double-membrane-chamber membrane capacitance assembly separately, and treated water enters a water outlet converter to be divided into purified water and concentrated water. The water outlet converter is provided with two water outlets, and the purified water isdischarged from the fresh water outlet; the concentrated water is discharged from the concentrated water outlet and returns to the raw water tank. The water outlet converter is provided with a signalline connected with a time relay, a time signal is transmitted to an electrode transfer device, and the electrode transfer device controls the conversion of positive and negative polarities of the two graphite electrodes. The system combines an ion concentration polarization technology with a membrane capacitance desalination technology, the desalination process of the fresh water chamber and theregeneration process of the concentrated water chamber can be synchronously achieved, and then continuous water outflow can be achieved. Electric energy released in the regeneration process of the concentrated water chamber can be recycled in situ, and the energy-saving purpose is effectively achieved.

Description

technical field [0001] The invention belongs to water treatment technology, in particular to a desalination device for treating salt water. Background technique [0002] With the development of industry and rural urbanization, the crisis of fresh water resources is becoming more and more serious. On the one hand, the reserves of fresh water resources available to human beings are decreasing; on the other hand, a large amount of water resources are polluted due to human reasons, so seawater desalination has become an important way to solve the current shortage of fresh water resources. Water desalination technology and the development of corresponding high-efficiency desalination devices have become the focus of domestic and foreign water treatment professionals. At present, the typical processes of water desalination technology include: ion exchange, multi-stage flash evaporation (MSF), multi-effect distillation (MED), reverse osmosis (RO), etc. Although the above desalinat...

AI Technical Summary

Problems solved by technology

Although membrane capacitance desalination technology has many advantages, after the electrodes on both sides are saturated with ion adsorption, a regeneration process is required, resulting in intermittent water discharge from the process, which greatly limits the application of this process in practical engineering.

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