What is the impact of gasification coal slagging on gasifiers

Gasification coal, gasification agent and high temperature are essential conditions for gasifiers to carry out gasification reactions. The quality of gasification coal will have a certain impact on the operation of gasifiers and gas production effects. The standards for measuring the quality of gasification coal include reactivity, adhesion, slagging, thermal stability, crushing strength and wear resistance, particle size composition, volatile content, as well as coal moisture, ash, sulfur, ash characteristics, etc. What impact can gasification coal slagging have on gasifiers?
The ability of minerals in raw coal to transform into slag due to the softening and melting of ash during gasification and combustion is called slagging. The slagging of coal is related to the chemical composition, ash melting properties and ash content of coal ash. Generally speaking, the lower the ash melting temperature, the more serious the slagging.
For fixed bed gasifiers, large pieces of slagging will destroy the uniform air permeability in the furnace. In severe cases, the grate cannot discharge slag smoothly, and manual slag removal is required, or even the furnace is forced to stop. In addition, the slag wraps the ungasified raw materials, which increases the carbon content of the discharged slag. For fluidized bed gasifiers, even a small amount of slagging will destroy the normal fluidization condition; in addition, the high temperature in the secondary air zone at the top of the furnace will cause the slag to block the gas outlet pipe.
It can be seen that the slagging of the raw coal has a great impact on the production and operation of the gasifier. When selecting gasification coal, please select qualified gasification coal according to the standards provided by the manufacturer. This will not only have a good gas production effect, but also be conducive to the long-term operation of the gasifier.