1. Coal drying and preheating area;

       2. Coal carbonization, pyrolysis and coking areas;

       3. Reduction reaction zone;

       4. Oxidation reaction zone, providing heat for semi-coke and coke;

       5. Gasification agent preheating and ash cooling area. The above five distinctions are divided into two stages. Section A——The gasification section also becomes the lower section. Section B——Pyrolysis and carbonization produces semi-coke and coke sections, which are also called upper sections. The gasification level, gasification layer thickness and gasification layer temperature of the two-stage furnace.

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