| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a slag tap structure having a simple structure and a slag tap structure having a simple structure capable of performing stable long-term continuous operation without blockage due to adhesion in the gasification furnace and the reaction part of the gasification furnace and beyond. To provide a gasifier used. SOLUTION: The gasification furnace 7 comprises a gasification furnace pressure vessel 15 in which a refractory material 11 is lined on a water cooling wall 12, a gasification chamber 22, and upper and lower reaction zones 8 and 9. In addition, the slit-intermediate round slag tap 17 having no cough is attached to the coal burner 5 of the lower reaction zone 9 inside the gasification chamber 22 inside the gasification furnace 7. It is installed in the central portion of the slag tap portion 25 below. In the upper reaction zone 8 of the gasification chamber 22, active chars are generated, and in the lower reaction zone 9, the temperature is maintained above the temperature at which the ash content in coal melts. Upper and lower reaction zones 8, 9 on gasifier Coal burners 5 and 6 are installed in the upper stage, and the active char in the upper reaction zone 8 is supplied to the high temperature zone in the lower stage along with the swirling downward flow, and after reacting with carbon dioxide and water vapor, the ash content is reduced. Becomes a molten slag state. |