Ash Hopper Refractories for Boilers

Refractory technology for the power industry has changed with the evolution of new demands for power and economic and environmental concerns. A wide variety of materials are available for use in industrial boilers, package boilers, cyclone boilers, waste-to-energy units, CFB's, ash hoppers and others.

Boilers

A boiler is a device used to burn fuel such as coal to superheat water to create steam. Shown below is a basic schematic of a boiler and its various parts.

Schematic of a boiler.

Ash Hopper Refractories

Ash hopper service includes a number of conditions, which can be detrimental to a refractory lining. Refractories used in this service must show good resistance to a variety of destructive conditions.

• Airborne particulate generated during combustion can cause severely abrasive conditions.
• Slag can fall into the hopper in large chunks called "clinker". The impact of this clinker upon the refractory can be quite severe.
• In the case of wet-bottom ash hoppers, the splash generated by falling clinker can introduce severe thermal shock.
• Products installed in ash hoppers can be cast, gunned or sprayed.

This information has been sourced, reviewed and adapted from materials provided by ANH Refractories Europe.

For more information on this source please visit ANH Refractories Europe.