Gasification furnace apparatus

Abstract

Provided is a gasification furnace apparatus equipped with a supply source of low-oxygen-concentration drying gas that does not require fuel. A coal pulverizer that produces pulverized coal by pulverizing coal, an air separator that separates air into oxygen gas and nitrogen gas, and a gasification furnace that produces product gas by introducing thereinto the pulverized coal and the oxygen gas, are included. By receiving a supply of excess nitrogen gas from the air separator, the air diluted with nitrogen is used as a source of low-oxygen-concentration gas for drying the pulverized coal, and an air heater that heats the source of low-oxygen-concentration gas to a temperature at which drying can be performed is provided.

1 . A gasification furnace apparatus comprising:
 a coal pulverizer that produces pulverized coal by pulverizing coal;   an air separator that separates air into oxygen gas and nitrogen gas; and   a gasification furnace into which the pulverized coal and the oxygen gas are introduced to produce product gas,   wherein, by receiving a supply of excess nitrogen gas from the air separator, the air diluted with nitrogen is used as a source of low-oxygen-concentration gas for drying the pulverized coal, and a heater that heats the source of low-oxygen-concentration gas to a temperature at which drying can be performed is provided.   
     
     
         2 . A gasification furnace apparatus according to  claim 1 , wherein the heater performs heat exchange between the vapor whose temperature is raised upon passing through the gasification furnace and the source of low-oxygen-concentration gas to achieve the temperature at which drying can be performed. 
     
     
         3 . A gasification furnace apparatus according to  claim 1 , wherein the heater is the gasification furnace, which raises the temperature of the excess nitrogen gas that passes therethrough.