Ozone producing system

Abstract

In an ozone producing electrolytic cell for producing ozone gas by water electrolysis, said anode compartment 1, said cathode compartment 2, said anode compartment frame 6, said anode 8, said ion exchange membrane 9, said cathode 10, said current collector 11, and said cathode compartment frame 12 constituting the electrolytic cell for ozone production 3 are all in the same shape of square or rectangular; and multiple numbers of grooves 13 are formed on the internal surfaces of said anode compartment frame 6 and said cathode compartment frame 12, thereby reducing current density to suppress load on the electrolytic cell for ozone production, even under a given current value supplied to the electrolytic cells for producing ozone.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an ozone producing system to produce ozone gas by means of water electrolysis in which the current density is kept smaller for a given electric current value applied to the electrolytic cell for ozone production, thus the load imposed on the electrolytic cell for ozone production being suppressed and the temperature in the electrolytic cell is kept lower in order to achieve ozone production at a higher efficiency and longer lives of structural members of the electrolytic cell for ozone production. [0003] 2. Description of the Related Art [0004] The method of producing ozone gas by means of water electrolysis is among those of publicly known technology, in which a conventional way has been the method by the electrolytic cell for ozone production with an anode supported with ozone generation catalyst on an electrically conductive porous material and a cathode supported with platinum ca...

AI Technical Summary

Benefits of technology

[0009] Then, the subject of the present invention to solve said problems is to provide an ozone producing system to generate ozone gas by water electrolysis wherein the shape of the electrolytic cells is discussed to enlarge electrolytic area through effective utilization of the volume shared by electrolytic cell for ozone production, so that ozone can be obtained at a high current efficiency under a small current density operation and lives of various structural members of the electrolytic cell for ozone production are prolonged; ozone is produced at a high efficiency in an economical space area; and ozone gas is generated at a high efficiency through uniform temperature within the electrolytic cell; and lives of various structural members of the electrolytic cell for ozone production are prolonged.

Problems solved by technology

The system described in JP 9-095791 A, however, has a weak point in that the size of the ozone producing system becomes large because the round shape of the electrolytic cell for ozone production presents a large volume in the ozone producing system to be installed.

On the other hand, if the electrolytic area is reduced, the cell must be operated at a higher current density to compensate for the reduced area, possibly leading to a lower current efficiency of ozone production or shorter lives of various structural members of the system.

In the system described in JP 11-315389 A, the temperature rise in the anode compartment can be suppressed and the temperature of the electrolytic cells can be reduced, but as no cathode cooling is applied, the temperature remains high, and then, lowering temperatures inside the electrolytic cells, especially at the interfaces between the ion exchange membrane and the anode and between the ion exchange membrane and the cathode, where electrolysis reaction is being performed, is not sufficient.

Because of these reasons, temperature distribution occurs within the electrolytic. cell; ozone gas concentration or current efficiency tend to be deteriorated due to degraded structural members with lapse of time; and frequent replacement of structural members is required to maintain satisfactory performance level, which are problematic to this system.

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