To provide a treating method for preventing bad conditions such as lowering of heat transfer by occurrence of inorganic salt precipitation, blocking of a fluid flow passage, and loss of catalytic activity, and to provide a treating apparatus for executing the treating method in a process for manufacturing fuel gas composed essentially of hydrogen, methane and the like by treating organic materials such as sewage sludge and biomass containing inorganic salts with supercritical water.
Before performing decomposition and gasification of organic materials with supercritical water in a reactor, slurry obtained by suspending organic materials to be treated in water and grinding particles are maintained in a floating fluidized state in a pretreatment vessel, are heated to the supercritical state of water, deposits attached to a vessel wall or the like are exfoliated and removed by the grinding particles, and further inorganic salt depositing as a solid particulate is separated and removed. A processing method for performing gasification treatment of fluid to be treated after removing the inorganic salt, is included.
MIKAMI NAOTO
OGAWA ETSURO
OSAKA GAS CO LTD
Kozo Sasa
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