Method, system and apparatus for firing control
First Claim
1. A method of controlling the air to fuel ratio in a burner comprising a venturi assembly, the method comprising:
- admixing air and a fuel in a venturi assembly, the venturi assembly having;
an outer venture surface;
an upstream air inlet,a converging portion with a primary injection fuel inlet,a throat portion downstream from the converging portion,a diverging portion downstream from the throat portion,an outlet, anda secondary gas inlet disposed on the outer venture surface and downstream from the converging portion and upstream from the outlet,the admixing comprising;
introducing fuel into the primary injection fuel inlet,receiving air through the air inlet by inspiration, andfeeding a gas through the secondary gas inlet,wherein the flow rate and content of the gas fed through the secondary gas inlet being selected to result in a desired air to fuel ratio through the outlet.
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Accused Products
Abstract
Disclosed herein is a method of controlling the air to fuel ratio in a burner containing a venturi assembly. The venturi includes an air inlet, a primary fuel inlet with a converging section, a throat portion downstream from the converging section, a diverging section downstream from the throat portion, an outlet, and a secondary gas inlet disposed downstream from the converging section and upstream from the outlet. The method comprises introducing fuel into the fuel inlet, receiving air through the air inlet by inspiration, and feeding a gas through the secondary gas inlet, the flow rate and content of the gas fed through the secondary gas inlet being selected to result in a desired air to fuel ratio through the outlet. A method of firing a heater, a burner, a furnace and firing control systems also are disclosed.
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Citations
21 Claims
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1. A method of controlling the air to fuel ratio in a burner comprising a venturi assembly, the method comprising:
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admixing air and a fuel in a venturi assembly, the venturi assembly having;
an outer venture surface;an upstream air inlet, a converging portion with a primary injection fuel inlet, a throat portion downstream from the converging portion, a diverging portion downstream from the throat portion, an outlet, and a secondary gas inlet disposed on the outer venture surface and downstream from the converging portion and upstream from the outlet, the admixing comprising; introducing fuel into the primary injection fuel inlet, receiving air through the air inlet by inspiration, and feeding a gas through the secondary gas inlet, wherein the flow rate and content of the gas fed through the secondary gas inlet being selected to result in a desired air to fuel ratio through the outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of firing a heater having at least one burner comprising a venturi assembly, the method comprising
admixing air and fuel in a venturi assembly, the venturi assembly having: - and outer venture surface;
an upstream air inlet, a converging portion with a primary injection fuel inlet, a throat portion downstream from the converging portion, a diverging portion downstream from the throat portion, an outlet, and a secondary gas inlet disposed on the outer venture surface and downstream from the converging portion and upstream from the outlet, the admixing comprising; introducing fuel into the primary injection fuel inlet, the fuel inspirating air into the air inlet, and feeding a gas through the secondary gas inlet, wherein a mixture of air and fuel in a selected air to fuel ratio exits the venturi assembly through the outlet. - View Dependent Claims (17, 18, 19, 20, 21)
- and outer venture surface;
Specification