Temperature changes in various stages of gas generation

I don’t know what result the original poster actually wants to achieve. However, its temperature changes can be understood from both the literal meaning and the meaning at various stages: before air is blown in, the temperature of the material layer inside the furnace is at its lowest; toward the end of the air-blowing process, this temperature reaches its highest value during the entire cycle, and the temperature inside the furnace gradually decreases as gas production proceeds ； During the blowing phase, due to the effect of the blowing air, the temperature in the ash bin is at its lowest level; whereas during the downward blowing phase, the temperature in the ash bin reaches its highest value throughout the entire cycle, as heat from the furnace is carried away ； During the blowing, upward blowing, secondary upward blowing, and cleaning phases, the gasifying agent enters from the bottom of the furnace; it first absorbs heat from the ash at the furnace bottom, causing the temperature there to drop, while the temperature rises as the gasifying agent carries away heat ； The temperature of the gasification layer inside the furnace moves upward or downward depending on the flow direction of the gasifying agent, but the overall temperature of the gasification layer decreases gradually during gas production ；