Liquid immersion pit type water electrolytic cell

Abstract

The invention discloses a liquid immersion pit type water electrolytic cell, which mainly comprises a double-electrode frame [1], a catalyst electrode net and a diaphragm [2], an anode frame [3], a cathode frame [4], a cell top and isolation [5], a cell bottom [6], an inner lining [7], a lightweight shell [8], a craft connecting tube [9], a connecting wire row [10], a de-oxygenating area and a connecting tube [11], a de-hydrogenating area and a connecting tube [12], a landfill chamber [13], granular filling material [14], a landfill chamber cover [15], a pressure release safety chamber cover [16], a pressure release safety chamber [17], etc. The device has the full-closed or semi-closed lightweight shell (can be reinforced by the landfill manner), a built-in electrolytic cell filter pressing group is electrified and works when being immersed in the electrolyte, hydrogen and oxygen generated in the electrolytic cells of all the units escape upwards from the two ends of the cells naturally along the respective air outlet, and then the hydrogen and oxygen escape out of the electrolytic cells along the hydrogen connecting tube or the oxygen connecting tube through the de-hydrogenating area or the de-oxygenating area. The electrolytic cell has the advantages of low cost, adapting to operation in any pressure and being safety and reliable; the electrolytic cell discards the traditional sealing manner of blocking, adopts dredging, namely the electrolytic cell immersion manner, the hydrogen and oxygen can go through or be discharged directly without a NaOH solution circulating pump, and the full-closed or semi-closed (glass steel) lightweight shell can bear high pressure operation on site in the landfill manner.

Description

technical field [0001] The invention relates to a water electrolysis technology for decomposing water into hydrogen and oxygen, in particular to a water electrolysis cell. Background technique [0002] The unit device that uses electric energy to decompose an electrolyte solution into other substances is called an electrolytic cell, and the combination of electrolytic cells is called an electrolytic cell, and the combination of water electrolytic cells is called a water electrolytic cell. Measures such as thin electrolytic cells, large-area catalytic electrodes, reduction of air bubbles (operating under pressure) and retention volume in the cell (forced circulation) are often used to improve electrolysis efficiency. The common device is a thin electrolytic cell with forced circulation of lye (pump). It is a medium-pressure water electrolyzer (1.6MPa, 3.2MPa, etc.) of a pressure filter group. [0003] The structure of the filter press group does not need to supply power to t...

AI Technical Summary

Problems solved by technology

[0007] According to Faraday's law of electrolysis, the electrolysis process of substances is related to the decomposition voltage and DC power, but not to the pressure; according to the information, there are alkaline water electrolysis devices with high voltage operation (20MPa) in foreign countries, such as Curry Whell device using unipolar The cylindrical electrolytic cell has large internal resistance and wiring resistance, and high energy consumption; the principle of the CJB device is essentially a medium pressure device plus a pressure vessel, and pure water is filled in the gap, which can be transmitted through the force of pure water to eliminate The pressure difference inside and outside the pool is used to improve the seal. The disadvantage is that the cost of expensive high-pressure vessels is increased. In addition, the system requires forced circulation of lye (pump), which is a weak link.

[0008] The conclusion drawn from this is that in theory, water electrolysis can be directly operated at high pressure, and there are also small-scale operation examples; but from the perspective of existing technologies, high-pressure operation cannot be realized according to the existing medium-pressure water electrolyzer manufacturing process , while the Curry-wheel type can be applied in special occasions regardless of cost. CJB has technical rationality, but there are many economic and technical problems, and it lacks market competitiveness.

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