Continuous type supercritical water oxidation system capable of being stably operated for long period

The invention provides a continuous type supercritical water oxidation system capable of being stably operated for a long period. The continuous type supercritical water oxidation system is composed of subsystems including a feeding system, an oxygen feeding system, a pre-heating system, a main reactor, a salt discharging system, a cooling and separation system, a safety system, a control system and the like. A pre-heater and a cooler are arranged to ensure that the whole system can be stably operated under the temperature and condition of supercritical water. Before materials enter the reactor, the materials are subjected to heat exchange with reacted hot fluid in the pre-heater and the temperature stress of materials of high-temperature and high-pressure equipment is reduced; a reactionproduct flows through a shell pass of the pre-heater and is slowly cooled, so that the removal rate of organic matters is easy to improve. The reaction product cooled by the pre-heater and salt-containing wastewater discharge