Self-absorbing water and self-generating water treatment device and method based on sandwich structure electrode

Abstract

The invention provides a self-absorption and self-generating water treatment device and method based on a sandwich structure electrode, comprising: a sandwich structure electrode, a water inlet tank and a water production tank; A double anode-single anode structure composed of a negative electrode, a separator material and an air positive electrode; the separator material is in contact with the air positive electrode and the film negative electrode on both sides respectively, the two ends of the separator material are exposed outside the contact surface, and the two layers of the separator material exposed at one end are used for It is placed in the water of the water inlet tank, and the exposed two-layer separator material at the other end is connected to the water production tank; the separator material is a porous film material with a thickness of less than or equal to 1mm, which is absorbent and non-conductive; the film negative electrode and an air positive electrode pass through wires respectively. It is connected to the electrical equipment and is used to supply power to the electrical equipment. The device has low internal resistance, high power generation and completely self-powered technology without external power.

Description

technical field [0001] The present invention relates to the technical fields of metal-air batteries and water treatment, in particular to a self-absorption and self-generating water treatment device and method based on a sandwich structure electrode. Background technique [0002] In recent years, sustainable water purification technology based on self-power supply has become a research hotspot in the field of water pollution control. How to realize wastewater treatment while generating electricity and recovering valuable substances is the goal of the joint efforts of researchers. In the prior art, in wastewater treatment, the inflow and outflow of wastewater need to be driven by a power supply device such as a peristaltic pump, which makes the advantages of a completely self-powered water treatment device more significant. Patent CN201911135030.2 studies a water treatment and recovery device based on metal-air battery and its method, and builds a water treatment method base...

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Problems solved by technology

Patent CN201911135030.2 studies the water treatment and recovery device and method based on metal-air batteries, and constructs a water treatment method based on metal-air batteries. Although it can realize synchronous wastewater treatment and power generation, it cannot achieve the purpose of complete self-power supply; the patent CN201911287298.8 has developed water treatment devices and methods based on iron-air batteries, but most of them also require an external power source to achieve efficient circulation and replenishment of wastewater; and based on the water treatment device based on metal-air batteries proposed in existing patents The electrode spacing of the positive and negative electrodes is generally at least at the cm level or even higher. Usually, the power generation efficiency of metal-air batteries is restricted by the internal resistance of the battery. Therefore, a larger electrode spacing will inevitably increase the internal resistance of the battery and reduce the power and efficiency of power generation.

At the same time, the power production efficiency of the battery is also restricted by the negative electrode power per unit mass. How to increase the power production per unit negative electrode mass has also become a bottleneck in the existing technology.

For the anode material with a thickness of cm, although it can provide more theoretical power generation capacity, due to the passivation problem during its use, the material inside the anode cannot be further utilized

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