TUBULAR REACTION APPARATUS AND SLURRY TREATMENT USING THE SAME

PROBLEM TO BE SOLVED: To provide a tubular reaction apparatus which is capable of cleaning the inside of pipes without stopping the apparatus and is capable of improving a working rate. SOLUTION: This apparatus is provided with a preheating section II between a slurry supply section I and a hydrothermal reaction section III and is provided with a precooling section IV between the hydrothermal reaction section III and a cooling section V, respectively. The preheating section II and the precooling section IV have the transfer pipes 1 constituting plural routes in a partial range and have stop valves 13, 14, 15 and 16: 31, 32, 33 and 34 which are capable of putting at least one route into a non-transfer state at the time of selection under the transfer state of at least one route so that the pipe parts 11 and 12: 28 and 29 of the routes in the non-transfer state are cleanably opened.