Industrial Developments

Low NOx Burner

CGRI has developed a novel low NOx burner utilizing direct fuel and air injection into the combustion chamber. An auxiliary low capacity burner/pilot is incorporated to maintain safe start-up and stable combustion. The burner maintains good combustion and low Ox (less than 20 ppm normalized to 3% O2) with high degrees of combustion pre-heat (1200 degrees F) without external flue gas recirculation. The detailed characterization of the fluid dynamics and chemical reactions in the near burner zone are the subject of a study by the Center for Advanced Gas Combustion Technologies (CAGCT) at Queen's University. Further work is continuing at CAGCT to investigate the potential of the CGRI Low NOx Burner as an Oxy-fuel burner. The burner is ideally suited to high temperature process applications where the waste heat can be recovered to preheat the incoming combustion air, thereby improving process efficiency, yet retaining low pollutant emissions. The CGRI Low NOx Burner is available for license.


Scrap Metal Preheater
Scrap Metal PreheaterCGRI developed a bucket style scrap metal preheater sized for loads of approximately 500 to 700 pounds of scrap to accomodate smaller scale induction melting furnaces. This equipment, licensed to R. J. Cyr Company Inc., features high efficiency with short preheating times of 5 to 9 minutes per load. A high dilution burner provides a minimal thermal gradient across the scrap metal for a nominal preheat of around 1000 degrees F (538 degrees C).

The preheater design utilizes a closed system at negative pressure so that any leakage is inward to the system and not outward to the foundry environment.

R.J. Cyr Company Inc. fabricated a pre-production version of the preheater and field tested it at Standard Induction Castings, a local foundry. The pre-production preheater utilized a space-saving 4 station turntable design achieving near-continuous production and included an afterburner. Tests showed a 17% reduction in batch heating time meaning increased throughput and reduced electrical consumption. Post-afterburner emissions were tested by an independent laboratory with excellent results. The pre-production preheater is still in operation at the foundry having well surpassed 50,000 charges. The foundry has realized significant benefits from the increased production capacity as well as from the reduced smoke, fumes and slatter on the furnace deck.

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