Case Studies · Power Generation

Mass-Burn Boiler High Emissivity Coating: Maintenance Cycle Extended from Quarterly to Semi-Annual

Sloped-grate mass-burn boiler·Waste-to-energy facility

A mass-burn waste-to-energy facility had slag buildup, incomplete combustion, hot spots, and thermal shock in its combustion chamber. Emisshield on the wall refractories and throat arch improved heat recovery and solid-waste combustion, reduced hot spots and slag adhesion, extended refractory life, and moved the maintenance cycle from quarterly to semi-annual.

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Maintenance quarterly to semi-annual
: Slag adhesion significantly reduced

The Challenge

Slag, hot spots, and thermal shock were consuming refractory and limiting throughput.

What Was Applied

Emisshield on the wall refractories and throat arch of the sloped-grate boiler.

Why It Worked

A high emissivity chamber spreads radiant energy across the grate and walls, which completes combustion, removes the concentrations that create hot spots, and presents a surface slag does not wet. See Production Increase, run length.

Summary of Results

Metric	Before	After
Heat recovery	Baseline	Improved
Combustion of solid waste	Incomplete	Improved
Hot spots	Present	Reduced
Slag adhesion	Significant	Significantly reduced
Maintenance cycle	Quarterly	Semi-annual
Throughput	Baseline	Improved

Next step

Operating the Same Asset?

Refractory campaigns cut short by slag? Send us the boiler data and maintenance history. We project the result from comparable documented installations.

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