Air and water vapor as gasification agents are blown into the furnace from the bottom of the furnace, and at 1100-1200 ℃, they undergo a redox reaction with the semi-coke coal entering the gasification section to form carbon monoxide and hydrogen as the main components. of gas.
The gas runs upwards in two parts, one of which moves up about 4 meters through the lower gas interlayer channel, and indirectly transfers its heat to the coal seam through the refractory material to assist the completion of the dry distillation and drying process, ensuring that the coal can be fully carried out during the falling process. Drying and dry distillation, and then this part of the gas is exported from the lower gas outlet, which is called the lower gas; and the other part of the gas goes up into the dry distillation section in the gas generation charge layer, and directly contacts with the slowly moving gasification coal. The heat is directly transferred to the coal for gasification, and the process of dry distillation and drying described above is carried out.
This part of the upward gas and the dry distillation gas produced in the dry distillation process are exported from the upper gas outlet together to form the upper gas.
