Limiting the presence of the oxides of nitrogen in regenerative heating systems
AssigneesBritish Gas Corporation, Hotwork Developments Ltd.
InventorJames H. Goodfellow
Life of this patent
Estimating the term…
Abstract
The presence of the oxides of nitrogen in the exhaust gas leaving a regenerator is limited by injecting water or water vapour into the regenerator 1 during its firing phase and causing the water or water vapour to reach the combustion chamber 26 of the regenerator 1 by way its heat storage bed 11 which has been preheated during a previous heat collecting phase.
Claims7
A regenerator adapted to limit the amount of nitrogen oxides in exhaust gas from a regenerator by causing water vapor to enter a combustion chamber of the regenerator during a firing phase in a form in which the water vapor is entrained in preheated combustion air, the regenerator comprising a shaft housing a heat storage bed, and means for injecting water or water vapor into the combustion air at a point upstream of the preheated storage bed with respect to the direction of movement of the combustion air so that the water or water vapor reaches the combustion chamber by way of the heat storage bed.
A regenerator, comprising:
- a) a shaft which houses a heat storage bed and which, in use, is substantially upwardly directed,
- b) means for injecting water or water vapor onto a surface of the heat storage bed which is uppermost when the shaft is in a substantially upwardly directed position,
- c) an inlet for supplying water or water vapor to the injecting means, and
- d) an outlet for discharging from the regenerator water which has percolated through the bed, the outlet being disposed beneath that surface of the bed which is uppermost when the shaft is in the substantially upwardly directed position.
Dependencies are inferred from the claim text.