Abstract
For the entrained flow coal gasifier, char in the product gas deposit on the heat exchanger tube though the ash is in the state of solid phase, and the thermal inhibition is caused in the heat exchanger of the gasifier. It is understood that there are remarkably differences among the char kinds. Therefore, it is required to be predicted the influence which the char kind and the operation condition give to the heat transfer performance of heat exchanger in order to achieve the performance and the stable operation of IGCC. In this study, first of all, the particle size and the specific surface area of eight char which had been obtained by the 2T/d process development unit were measured, and the form change of char according to the progress of the reaction was clarified. And the char deposition tests around the horizontal circular tube were executed and char deposition mechanism was discussed.
