Introduction To The Zoning Of Fuel Layer In Gas Furnace

Introduction To The Zoning Of Fuel Layer In Gas Furnace
The gasification reaction of solid fuel is divided into five layers according to the characteristics of the production process in the gas furnace, namely: 1. the drying layer; 2. Dry distillation layer; 3. Reduction layer (gasification layer); 4. Oxidation layer (gasification layer); 5. Ash layer/ash layer.
The drying layer is at the top of the fuel layer, the fuel contacts with cold coal, and the water in the fuel can evaporate;
The retorting layer is below the drying layer. As the temperature conditions are similar to those of the retorting furnace, the fuel will be cold decomposed, and volatile matter and other retorting products will be released into coke. The coke will be transferred from the retorting layer to the gasification layer for cold chemical reaction;
The main area of the gasification process in the gasifier, where carbon and gasifier in the fuel react violently. In view of different reaction conditions, the gasification layer can also be divided into oxidation layer and reduction layer.
Reduction layer The reduction layer is the area where the main combustible gas is generated. Carbon dioxide acts with the burning cold carbon to conduct a cooling absorption chemical reaction to produce combustible carbon monoxide; Water vapor reacts with the burning cold carbon to generate combustible carbon monoxide and hydrogen, and absorbs a large amount of cold.
The oxide layer carbon is oxidized to carbon dioxide and carbon monoxide by the oxygen in the gasifying agent, and a large amount of cold energy is released. The cold capacity required for the cold chemical reaction of gas is maintained by this. The temperature of oxidation layer is generally maintained at 1100~1250 ℃, which depends on the melting point of raw coal ash.
Ash layer The ash layer formed by the furnace slag after gasification can pre cool and evenly distribute the gasification agent entering from the furnace bottom, and play a role in protecting the furnace bar and ash tray. The height of different zones in the fuel layer varies with the type and nature of fuel, and the gasification agent and conditions used. Moreover, there is no obvious boundary between the regional layers, which are often interlaced.