Synthetic air assembly for oxy-fuel fired furnaces
AssigneeFrazier-Simplex, Inc.
InventorsRonald D. Argent, Christopher J. Hoyle, Gordon Dickinson, Trevor Ward, George R. Mattocks
Life of this patent
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Abstract
A method and assembly is provided for modifying a regenerative or a recuperative furnace system having air-fuel burners for use with synthetic air. A portion of the exhaust gases from the furnace is recycled and mixed with oxygen gas to form synthetic air. The synthetic air is then used to support combustion in the furnace. A cassette regenerative oxy-fuel cross-fired furnace system is also provided. The cassette regenerative furnace system utilizes synthetic air containing a mixture of recycled exhaust gases and oxygen in combination with cassette regenerators.
Claims13
A method of modifying a regenerative furnace system having a flue passageway and air/fuel burners for use with synthetic air, comprising the steps of:
- forming a first by-pass opening and a second by-pass opening in the flue passageway;
- dividing exhaust gases from the furnace system into a first exhaust gas portion and a second exhaust gas portion;
- directing the first exhaust gas portion through the first by-pass opening into a synthetic air assembly;
- mixing oxygen with the first exhaust gas portion to form synthetic air;
- and
- directing the synthetic air through the second by-pass opening to support combustion at the furnace system burners.
A synthetic air assembly for a regenerative furnace system having a first reversal valve and a flue passageway, comprising:
- a first by-pass opening in the flue passageway;
- a second by-pass opening in the flue passageway;
- a second reversal valve in flow communication with the first and second by-pass openings;
- a mixing assembly in flow communication with the second reversal valve;
- and
- an oxygen source in flow communication with the mixing assembly.
A synthetic air assembly for a regenerative furnace system having a first reversal valve and a flue passageway, the assembly comprising:
- a first by-pass opening in the flue passageway;
- a second reversal valve;
- a first conduit extending between the first by-pass opening and the second reversal valve;
- a first isolation valve located in the first conduit;
- a mixing assembly;
- a second conduit extending between the second reversal valve and the mixing assembly;
- an oxygen source;
- an oxygen conduit extending between the oxygen source and the mixing assembly;
- a third conduit extending between the mixing assembly and the second reversal valve;
- a second by-pass opening in the flue passageway;
- a fourth conduit extending between the second reversal valve and the second by-pass opening;
- and
- a second isolation valve located in the fourth conduit.
Dependencies are inferred from the claim text.