How should the particle size be controlled when using a single-stage gas generator?
Because in the process of converting coal into gas in a single-stage gasifier, a mixture of air and water vapor is required as a gasification agent. In order for the gasification agent to flow smoothly in the coal seam, we must use lump-shaped coal and ensure appropriate particle size. The less coal dust, the better.
Generally speaking, the larger the single-stage gas generator model, the larger the required coal particle size, which is approximately within the range of 20-80mm. The particle size of coal used for gasification is uneven and the proportion of coal dust in it is too high, which causesSingle stage gas generatorThe main reasons are the chaotic gasification level and poor economic efficiency of gas stations.
The particle size of the gasified fuel entering the furnace is uneven, resulting in uneven gasification agent flow rates, resulting in different coal gasification speeds, resulting in chaos in the oxidation layer and reduction layer, affecting gas production and gas quality.
The increase in coal particle size will reduce the resistance of the material layer and increase the flow rate of the gasification agent, causing the fire layer to move upward. In severe cases, the central tube will be burned out. On the contrary, if the particle size of the coal is very small or coal dust is entrained, the resistance of the material layer will increase and the gasification intensity will decrease, causing the gasification conditions to be destroyed and the temperature of the oxide layer to drop. The coal will be taken out during the ash removal before it is fully gasified, resulting in unburned carbon blocks in the slag, an increase in the carbon content of the ash, and a decrease in gas production and gas quality.