Method of firing coal boiler to produce secondary fuel gas
OwnerJoseph F. Gieckinventor
Life of this patent
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Abstract
A method of firing coal-powered boilers to produce both heat to operate the boiler at its full rated capacity, and also to produce a usable fuel gas generally equal in heat content to the heat consumed in the boiler to produce steam, said method consisting of burning pulverized coal in the presence of varying proportions of steam and oxygen. The boiler is over-fired with coal, but with an undersupply of oxygen, in order that the total available heat content of the coal is divided between heat released by the incomplete combustion thereof, which may be sufficient to operate the boiler at full steam capacity, and heat content contained in combustible flue gases, which may be utilized for many different purposes.
Claims5
A method of firing a coal-fired boiler as used in the production of steam comprising:
- a. introducing coal in pulverized form into the firebox of said boiler in an amount greater than would be required to enable said boiler to produce steam at its rated capacity if an amount of oxygen were introduced sufficient to produce full combustion of said coal, and
- b. introducing oxygen into said firebox, and burning said coal in the presence thereof, in quantities insufficient to produce full combustion of said coal, whereby the proportion of the total heat content of said coal released as heat by the resulting partial combustion of said coal is reduced, and the gaseous products of said partial combustion contain quantities of carbon monoxide which are combustible and may be utilized as fuel gas, and selecting proper coal-oxygen proportions, such that the amount of heat released by said partial combustion is sufficient to enable the boiler to produce steam at its rated capacity while still producing gases containing useful quantities of combustible carbon monoxide.
Dependencies are inferred from the claim text.