The present invention relates to a double-seal
electrolysis unit and a high-pressure
electrolytic cell formed by the double-seal
electrolysis unit, belonging to the technical field of pressure electrolytic cells. The
electrolysis unit is composed of a pair of
electrode plates, an annular seal abutting the side surfaces of the
electrode plates, and an electrolytic diaphragm sandwiched between the opposite sides of the pair of
electrode plates, which are pressed against each other. The annular seal is divided into an inner ring seal and an outer ring seal. The inner ring seal is provided on both the front and back sides of the electrode plates, and an outer ring seal is provided between the opposite sides of the pair of electrode plates. A convex ring is formed on the outer side of the inner ring seal. The convex ring of the inner ring seal abuts one side of the electrolytic diaphragm to form a first wire seal and abuts the other side of the electrolytic diaphragm to form a second wire seal. The outer ring seal forms a radial limit relative to the electrode plates. Thus, the plane seal between the electrolytic diaphragm and the electrode plates is converted into a wire seal. The high-pressure
electrolytic cell formed by the electrolysis unit can realize high-pressure hydrogenation to
oxygen production.