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Page 9
The apparatus is easily and rapidly taken apart. It it is only
necessary to remove the nozzle, C, in order to partially clean it. It
would even seem that the cleaning might be done automatically by
occasionally reversing the flow of the steam and petroleum. However
efficacious such a method might prove, the apparatus as we have
described it can be very easily applied to any generator. Fig. 2
represents it as applied to the front of a furnace provided with two
doors. A metallic box, with two compartments, is placed on one side of
the furnace, and is provided with two stuffing boxes that are capable
of revolving around the steam and petroleum pipes. The latter thus
form the pivots of the hinge that allows of the play of the vaporizers
and piping.
[Illustration: FIG. 2--THE BURNER APPLIED TO THE FURNACE OF A BOILER.]
It was in this way that Mr. Dietrich arranged his apparatus in an
experiment made upon a stationary boiler belonging to a Mr. Corpet.
The experiment was satisfactory and led to the adoption of the
arrangement shown in Fig. 3. The fire bridge is constructed of
refractory bricks, and the majority of the grate bars are filled in
with brick. The few free bars permit of the firing of the boiler and
of access of air to the interior of the fire box. Under such
circumstances, the combustion is very regular, the furnace does not
roar, and the smoke-consuming qualities are perfect.
[Illustration: FIG. 3--APPLICATION OF THE BURNER TO A RETURN FLAME
BOILER.]
In the experiment on the Flamboyante, the boiler was provided with but
one apparatus, and the grate remained covered with a layer of ignited
coal that had been used for firing up in order to obtain the necessary
pressure of steam to set the vaporizer in operation. This ignited coal
appeared to very advantageously replace the refractory bricks, the
role of which it exactly fulfilled. It has been found well, moreover,
to break the flames by a few piles of bricks in the furnace, in order
to obtain as intimate a mixture as possible of the inflammable gases.
It is to be remarked that firing up in order to obtain the necessary
steam at first is a drawback that might be surmounted by using at the
beginning of the operation a very small auxiliary boiler. The main
furnace would then be fired by means of say a wad of cotton. But, in
current practice, if a grate and fire be retained, the firing will
perhaps be simpler.
With but one apparatus, the pressure in the Flamboyante's boiler rose
in a few minutes from 6 to 25 pounds, and about a quarter of an hour
after leaving the wharf the apparatus had been so regulated that there
was no sign of smoke. This property of the Dietrich burner proceeds
naturally from the use of a jet of steam to carry along the petroleum
and air necessary for combustion. It is, in fact, an Orvis smoke
consumer transformed, and applied in a special way.
It must be added that the regulating requires a certain amount of
practice and even a certain amount of time at every change in the
boat's running. So it is well to use two, and even three, apparatus,
of a size adapted to that of the boiler. The regulation of the furnace
temperature is then effected by extinguishing one or two, or even
three, of the apparatus, according as it is desired to slow up more or
less or to come to a standstill.
The oil used by Mr. De Dosme on his yacht comes from Comaille, near
Antun. The price of it is quite low, and, seeing the feeble
consumption (from 33 to 45 lb. for the yacht's boiler), it competes
advantageously with the coal that Mr. De Dosme was formerly obliged to
use.--_La Nature._
* * * * *
[Continued from SUPPLEMENT, No. 622, page 9935.]
THE CHANGE OF GAUGE OF SOUTHERN RAILROADS IN 1886.[1]
[Footnote 1: A paper read before the Western Society of Engineers,
June 7, 1887.]
By C.H. HUDSON.
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