How to switch between coal types with high and low ash fusion points in the operation of a gasifier?

When there is a change in coal type, the workshop should issue a formal notice in advance and record it in the shift handover log. Analysts pay attention to changes in ash melting point, moisture, ash content, slurry concentration, particle size, viscosity, turbidity of the ash water, and the residual carbon content in the slag samples, and provide timely feedback to the operators ； The control room staff monitor the slag port pressure difference, furnace temperature, and syngas composition ； The on-site staff carefully inspected the temperature of the gasification furnace walls, the condition of the slag samples, and the operation of the bag filter. The personnel on site and those in the control room need to work together to understand the operation of the entire system. During periods when the type of coal used changes, the control room staff should regularly check the trend charts of indicators such as furnace temperature, slag outlet pressure difference, and syngas composition, in order to understand how the furnace conditions are evolving during that time. They should then ask the personnel on site about the conditions of the slag samples and wall temperatures, and compare these with the furnace temperature, slag outlet pressure difference, and syngas composition data, in order to determine the most suitable furnace operating conditions.

Another thing to take into account is the approximate time when coal with a high ash fusion point will enter the furnace, and temperature raising should be carried out in advance.