Integrated control system for induced draft combustion
First Claim
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1. A system for controlling the fuel to air ratio in an induced draft combustion chamber comprising in combination:
- a combustion chamber;
a gas fuel burner in said combustion chamber;
means for supplying fuel to said combustion chamber fuel burner;
means for inducing a flow of air in said combustion chamber to support combustion of said fuel;
a control pilot chamber;
a gas fuel burner in said control pilot chambermeans for supplying fuel to said control pilot burner;
means for establishing a proportional ratio between the quantity of fuel fed to the combustion chamber burner and the quantity of fuel fed to said control pilot burner;
means coupling said control pilot chamber to said means for inducing a flow of air so that a quantity of air drawn through said control pilot chamber is proportional to the quantity of air drawn through said combustion chamber; and
means for controlling the fuel to air ratio in said control pilot chamber.
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Abstract
An integrated, closed loop system for controlling the fuel to air ratio in an induced draft combustion chamber which has a control pilot through which a draft is induced so that the fuel to air ratio in the control pilot chamber has a predetermined ratio to the fuel to air ratio in the primary combustion chamber.
65 Citations
6 Claims
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1. A system for controlling the fuel to air ratio in an induced draft combustion chamber comprising in combination:
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a combustion chamber; a gas fuel burner in said combustion chamber; means for supplying fuel to said combustion chamber fuel burner; means for inducing a flow of air in said combustion chamber to support combustion of said fuel; a control pilot chamber; a gas fuel burner in said control pilot chamber means for supplying fuel to said control pilot burner; means for establishing a proportional ratio between the quantity of fuel fed to the combustion chamber burner and the quantity of fuel fed to said control pilot burner; means coupling said control pilot chamber to said means for inducing a flow of air so that a quantity of air drawn through said control pilot chamber is proportional to the quantity of air drawn through said combustion chamber; and means for controlling the fuel to air ratio in said control pilot chamber. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification