SLAG TAP STRUCTURE AND GASIFICATION APPARATUS USING THE SLAG TAP

摘要

PROBLEM TO BE SOLVED: To obtain a slag tap structure having a simple structure, capable of carrying out stable continuous operation for a long time without causing clogging due to attachment of deposition to the interior of a gasification furnace and the part after a gasification furnace reacting part and provide a gasification apparatus using the slag tap. SOLUTION: The gasification furnace 7 is lined with a fire-resistant material 11 onto the water-cooling wall of its pressure container 15 and has upper and lower stage reaction zones 8 and 9 in its gasification chamber 22. The slag tap 17 having a round type shape in the intermediate of a slit part, without dam is installed in the center part of slag tap part 25 in the lower part of a coal burner 5 of the lower stage reaction zone 9 in the gasification chamber 22 in the lower part of the gasification furnace 7. Active chair is produced in the upper stage reaction zone 8 of the gasification chamber 22 and ash in coal is kept at a melting temperature or above in the lower stage reaction zone 9. Coal burners 5 and 6 are installed in the lower stage reaction zones 8 and 9 of the gasification furnace and the active char is fed together with rotating and lowering flow to a lower-stage high temperature zone in the upper stage reaction zone 8 and reacted with carbon dioxide, steam and then the ash is kept in melted slag state.