Chemical oxygen demand detection method and equipment based on supercritical water oxidization

The invention discloses a new method for measuring chemical oxygen demand of organic pollutants. The method organically combines supercritical water oxidization technique with oxygen content in situ measurement technique, and calculates oxygen quantity consumed in supercritical water oxidization treatment of the organic pollutants, so as to accurately obtain the chemical oxygen demand of the pollutant; the involved devices mainly include a supercritical water oxidization device and an oxygen content in situ measurement device; the supercritical water oxidization device quickly carries out deep oxidative degradation on the organic pollutants to produce carbon dioxide, water, nitrogen and other inorganic components by mainly utilizing special characteristics presented by water in the supercritical state; the oxygen content in situ measurement device is mainly used for obtaining the oxygen content data in the system before and after the supercritical water oxidization treatment of the organic pollutants in situ and can conveniently obtain the chemical oxygen demand of the pollutant by calculating the difference; and the method is complete and quick in oxidization, wide in treatment objects, high in accuracy and free from secondary pollution.