Kenneth L. Maloney, Ph.D., Inc.
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Flue Gas Recirculation (FGR)

Flue Gas Recirculation (FGR) is a combustion modification process for stoker-fired boilers that will increase boiler efficiency and steaming capacity, while at the same time reduce particulates, stack opacity and NOx emissions. Emissions of sulfur oxides (SOx) can also be controlled with FGR when limestone is added to the fuel in the form of a coal/limestone pellet.

Patent Number: 4,335,660

Stoker Gas Matrix Burner

Kenneth L. Maloney, PhD, Inc. holds the U.S. Patent Number 60/170,704 for the Stoker Gas Matrix Burner (SGMB) gas burner technology. SGMB is a cost effective way to convert existing stoker-fired boilers to natural gas, producer gas, coke oven gas or blast furnace gas. The burner simulates coal firing by keeping the flames low in the furnace without wall impingement. The SGMB burners are low heat release rate burners so that they have an inherently low NOx emission. Boiler efficiencies are improved with the use of the SGMB system because the furnace can fire at low excess air. The SGMB system is completely automatic, with one button start-up on the Burner Management System. SGMB systems can be easily installed in less than a day and removed just as fast for solid fuel firing on the grate. All existing coal firing equipment is left intact. The existing I.D. and F.D. fans are used with the SGMB system. Turn down ratios exceed 10:1.

Patent Number 60/170,704

Staged Air and Gas Burner (SAGB)

The SAGB system is covered under the SGMB Patent Letters. This burner system allows co-firing of gaseous fuels, as mentioned above, over the fuel bed of stoker fired furnaces. This burner allows a great deal of fuel flexibility with the use of any ratio of solid fuel on the grate to gas over the grate. The SAGB system is ideal for cold light off without the use of oil soaked rags and kindling timber. Gas co-firing has benefits of reduced emissions of NOx, SOx, CO, particulate and opacity. Rapid load response is a large benefit of the SAGB system. The gas burners respond to rapid load demands, while the solid fuel on the grate maintains a base load. Smoking during these load swings is thus avoided. SAGB turn down is greater than 10:1.

Recent Patents Developed By Kenneth L. Maloney, Ph.D., Inc.

NamePatent NumberPrinciple Author
Low Pressure Jet Burner with High Swirl Tip Ventilated Burner and Staging Modules for Low Nox and Low SOx Combustion60/914,956KL Maloney et al.
Co-Firing Gas Over Coal in a Stoker Boiler60/948,289KL Maloney et al.
Flue Gas Recirculation for Fluidized Bed Combustors60/945,144KL Maloney et al.
Traveling Thin Bed Absorption System60/945,155KL Maloney et al.
Traveling Grate Pyrolyzing Boiler60/898,488Kenneth L. Maloney & Jeffrey Maloney
Hot Cyclone Gassifier60/992,619 KL Maloney et al.
Copyright 2011
Kenneth L. Maloney, Ph.D., Inc.