Procedure for supplying combustion air and a furnace therefor
AssigneeMartin GmbH fur Umwelt- und Energietechnik
InventorJohannes J. E. Martin
Life of this patent
Estimating the term…
Abstract
The procedure for supplying combustion air during grate firings, in which the primary combustion air is introduced into the fuel, and secondary combustion air is introduced directly into the flow of exhaust gas, and in which, in addition, some of the exhaust gas is tapped off from the flow of exhaust gas and returned to the combustion process, includes the withdrawal of exhaust gas directly above the fuel in the area where there is a large quantity of unused primary air, and the delivery of this exhaust gas that has been tapped off to the combustion air, the quantity of which is reduced according to the quantity of exhaust gas that is mixed with it.
Claims13
A procedure for supplying combustion air in furnace grates, in which primary combustion air is introduced directly through the fuel and secondary combustion air is supplied directly into the flow of exhaust gas, and in which, in addition, some of the exhaust gas is tapped off from the exhaust gas flow and returned to the combustion process, wherein the exhaust gas is tapped off directly above the fuel in the area where there is a large part of unused primary air and returned to the combustion air, the quantity of which is reduced in accordance with the quantity of exhaust gas that is mixed with it.
A furnace for carrying out a procedure for supplying air to a combustion chamber, in which primary combustion air is introduced directly through a fuel to be consumed, secondary combustion air is supplied directly into a flow of exhaust gas, and a portion of the exhaust gas is channeled from the flow of exhaust gas and returned to the combustion chamber, the furnace comprising:
- a grate for holding the fuel, said grate permitting said primary combustion air to pass therethrough;
- a system for supplying primary combustion air through said grate and the fuel held thereon;
- nozzles that open out into said combustion chamber for providing secondary combustion air, said nozzles being positioned at a first position;
- an exhaust flue positioned above said nozzles for permitting said exhaust gas to escape from said combustion chamber;
- and,
- at least one exhaust line for channeling and returning a portion of said exhaust gas to said combustion chamber, said at least one exhaust line positioned below said first position with respect to said flow of exhaust gas.
Dependencies are inferred from the claim text.