GASIFICATION FURNACE, GASIFICATION POWER PLANT, AND METHOD OF PREVENTING BLOCKAGE OF SLAG HOLE IN GASIFICATION FURNANCE

摘要

An object is to prevent blockage of a slag hole with char and slag, enabling stable operation of a gasification furnace. In a configuration in which a heat exchanger (20) is provided above a coal gasification portion (10), the diameters (D1, D3) of the slag hole (16) and the throat portion (17) are set to three times or more the pitch (ST) of rows of heat exchange tubes (21). By doing so, blockage of the slag hole (16) or the throat portion (17) with char and a sintered material (50) falling from the heat exchanger (20) is prevented, enabling stable operation of a coal gasification furnace (101).