One exceedingly good way of making any burner work,
independently of the currents caused by a revolving cylinder, is to
apply the flame inside the cylinder at the center, making the substances
to be heated to fall in a continuous stream through the flame. This
system is not applicable to fine powders or sticky substances, as it
necessitates the perforation of the cylinder, to allow of the escape of
products of combustion.
For this class of work, a very concentrated heat is not desirable, as a
rule, and a slit or a perforated burner is preferable. Of this class of
burner I have here a sample, which is not only new in its constructive
details, but has great and special advantages for many purposes. As
you see, it resembles a number of ordinary furnace bars, with this
difference, that each bar is a burner; in fact, it is an ordinary
furnace grate, which supplies its own fuel. With the usual day pressure
of gas=1 inch of water, this burner will, at its maximum power, consume
about 100 cubic feet of gas per hour per square foot of burner surface,
and as it can readily be made almost any form or size, its adaptability
for a great number of uses is evident.
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