FURNACE HEAT EXCHANGER
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United States of America Patent
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Issued Date -
Jun 11, 2009
app pub date -
Dec 2, 2008
filing date -
Dec 5, 2007
priority date (Note) -
Abandoned
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Abstract
. The combustion gases produced by the premix burner are mixed with secondary air flows entering the system in this dilution zone, whereby diluted combustion gases are obtained. These diluted combustion gases will then enter the heat exchangers via the distributor. The combustion gases, having a temperature of about 1600° C. are diluted with the secondary air flows to a temperature of about 600° C. The premix burner is surrounded by a shield, which prevents a direct cooling of the flames on the burner membrane. When flames are cooled by an air flow, CO levels rise because complete combustion of the combustible air/gas mixture is prevented. In the system of the invention a complete combustion of the combustible air/gas mixture is achieved and the right temperature of gases is delivered to the heat exchangers, without creation of undesirable combustion products since cooling of the flames is avoided.
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