How to Protect Grates and Furnace Walls from Excessively High Temperatures When Incinerating High-calorific-value, Lightweight Solid Waste

When high-calorific, light solid waste is burned, furnace temperature tends to run high, so protecting the grate and walls requires material, structural, operating and process measures at the same time.

Refractory and insulation materials

The wall refractory layer uses high-alumina brick or silicon carbide composite as the lining to resist high-temperature molten slag; the grate is made of high-temperature alloy steel to raise strength and corrosion resistance at high temperature.

Structural design and cooling

The structure strengthens heat dissipation to lower the actual surface temperature of grate and walls. The combustion chamber uses a stepped grate with a rotating arch to promote material tumbling and avoid local piles overheating.

Temperature control and operation

Air volume is adjusted precisely during operation to avoid over-temperature; a waste heat boiler or steam generator is installed to recover surplus heat and draw it out of the furnace; furnace temperature and heated parts are monitored in real time and maintained promptly when abnormal.

Process adaptation

Raw material is pre-treated and feed is layered, using a multi-stage feed system so that calorific value and particle size entering the furnace are more uniform and local intense burning is reduced.