Refractory Pit Burners

Refractory Pit Burners- How do they work?

A power source, either electric motor or diesel power unit, drives a fan which in turn creates an air curtain by forcing air through a plenum and nozzle. This high velocity air travels across the top of the pit in which a fire has been started.


The air curtain traps smoke/small particles and recirculates them to enhance combustion and reduce smoke. This large volume of air accelerates combustion and provide high pit temperatures between 1800°F and 2500°F. Underfire air (available only on refractory units) introduces air underneath air curtain to ensure complete combustion and to minimize opacity at start-up.

The refractory pit provides a safe combustion chamber. Specially designed refractory panels prevent excess heat from escaping. Refractory pits are ideal for use in areas with high water tables and sandy soil conditions or where opacity must be kept to a minimum. Upper-chamber refractory panels act as a heat sink, allowing more retention time in the burner to more effectively control opacity and any sparks. Expanded metal top screen (optional) controls sparks or floating debris from leaving the burner.



  • 97% volume reduction
  • Burns 3-15 tons per hour (depending on size of unit)
  • Pit burner is easily loaded with forklifts, dump bins, or front-end loaders.


From three-phase electric to diesel units, McPherson Systems offers multiple options to meet your above ground burning needs. Please call or email us to receive a personalized quote for one of these units.

Questions? Give us a call, we’re happy to assist.