Water molecule is decomposed easily to hydrogen and oxygen under the mild condition, i. e., under room temperature and 1 atm by electrolysis. Nevertheless thus obtained hydrogen and oxygen react vigorously and release much heat. Therefore we can get high temperature heat by combining electrolysis and combustion of hydrogen and oxygen. The idea has been proposed hitherto in Japan and also in the foreign counties, but only IS Plan got to produce the system, i. e., the aqua gas generator commercially in Japan. Here we shows the outline and the feature of the system. By the combustion of hydrogen and oxygen, the temperature of the flame gets to about 2000°C. Therefore, by means of the high temperature flame, it is easy to melt metals and also plastics to cut down or reform the surface of the materials. Such high temperature heat is also applied to decompose harmful organic chlorine compounds. Disposed waste materials are generally burned in the furnace but emission of hazard compounds are serious problems. The aqua gas generator solved the problems.
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