| abstract |
In this gasification system 10, there are provided differential pressure measurement units 34a-34c, 35a, 35b for measuring the differential pressure between the inlets and outlets of a heat exchanger 31, a heater 32, and a gasification reactor 33. When measurement results from these differential pressure measurement units 34a-34c, 35a, 35b are elevated above a reference value based on the differential pressure in the absence of adhesion of tar, etc., viscous fluid adhering to pipe inner wall surfaces of the heat exchanger 31, heater 32, and gasification reactor 33 is decomposed and removed by replacing the slurry circulating within the gasification system 10 with pure water and then injecting aqueous hydrogen peroxide (oxidizing agent) from an injection device 50 via a pump 51 into the location where the above elevated measurement result was found, the injection taking place for a prescribed time, in a prescribed amount, or until the differential pressure falls to the reference value. This makes it possible to preempt blockage of the pipe flow path and/or a decrease in the heat transfer rate caused by clogging by the viscous fluid, as well as to reduce equipment costs by increasing the continuous operating time to thereby raise the equipment utilization rate. |