Port wall air jet for controlling combustion air
AssigneePPG Industries, Inc.
InventorEdward P. Savolskis
Life of this patent
Estimating the term…
Abstract
In a multiport combustion furnace having a plurality of firing ports in undivided communication with a common source of combustion gas or air, the invention provides a method and apparatus for selective control of combustion air flow into one or more of the ports. A small quantity of pressurized gas, e.g. air, is injected, e.g. by way of a flow control pipe in an individual port, generally along the flow path of combustion air through the port to alter the amount of combustion air flowing into the port for mixing with fuel. Combustion air is increased by injecting air cocurrent with the combustion air flow to induce additional flow into the port. Combustion air is decreased by injecting air countercurrent to the flow to impede flow through the port.
Claims11
A method of operating a regenerative furnace wherein combustion gas is preheated in a regenerator bed and then is passed to a plenum communicating along its length with a plurality of ports through which the combustion gas passes into the furnace, and fuel is combined with the combustion gas at the ports;
- the improvement comprising apportioning the flow of combustion gas among the plurality of ports by injecting a stream of gas into at least one of the ports so as to affect the portion of the combustion gas flowing therethrough.
Dependencies are inferred from the claim text.