Method of retaining sulfur in ash during coal combustion

Details Method of retaining sulfur in ash during coal combustion Method of retaining sulfur in ash during coal combustion

1990-09-04

1991-08-27

Favors, Edward G.

Furnaces

Process

Burning pulverized fuel

110260, 110266, 431284, F22D 100

Patent

active

050424041

ABSTRACT:
An improved method for burning carbonaceous material containing sulfur to reduce emissions of SO.sub.2 is disclosed wherein the carbonaceous material is projected into a furnace as one or more streams and each stream is continuously ignited with a volatile fuel such as natural gas, oil, liquefied petroleum gas or naptha. The volatile fuel is supplied separately from the carbonaceous material and is directed into each stream of the carbonaceous material as it enters the furnace so as to cause the material to be enveloped in a reducing atmosphere during its volatilization. In consequence, at least a portion of the sulfur contained in the carbonaceous material is retained within the ash slag in its reduced or sulfide form.

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"Coal Fired Precombustors for Simultaneous NO.sub.x, SO.sub.x, and Particulate Control" G. C. England, J. F. La Fond and R. Payne, EPA/EPRI Stationary Source NO.sub.x Symposium, Boston, May, 1985.

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