Improvements in Steam Generators.
Year: 1892

page_text: Date of Application, 2nd Mar., 1892-Accepted, 2nd Apr., 1892
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
1, MAX SEIPP, of 12, Neue Schönhauserstrasse, Berlin, in the German Empire,
Civil Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
This invention relates to steam generators of the type wherein the heating
surface is to a great extent arranged on the water-tube' system. In steam
generators of this class as ordinarily constructed, the incandescent gases proceeding
from the furnace pass upwards and downwards between the heating tubes; and
in consequence of being too rapidly cooled, more or less combustible matter passes
away without being consumed, thick smoke and soot resulting. Consequently,
generators of this class can only be advantageously used with short-flamed coal,
anthracite or coke, and yield, per unit of heating surface, less steam than many
boilers in which the flames have freer play.
A steam generator constructed according to my improved method is illustrated
in the accompanying drawings; whereof
Fig. 1 is a longitudinal vertical section,
Fig. 2 a transverse vertical section on the lines -x, y—y (Fig. 1), and
Fig. 3 a horizontal section on the line - (Fig. 1).
The present construction of generator is more particularly intended for use with
fuel burning with a long flame, complete combustion of the gases taking place
in the large combustion chamber A, the heating tubes D being so distributed along
the walls of the same that the hot gases are not compelled to pass between them:
the greater portion of the heat conveyed by the gases being imparted to the tubes
by radiation, before the gases escape from the combustion chamber and pass
amongst the feed-pipes C arranged behind the walls and towards the roof of the
said chamber. It further results from this system of working, that the temperature
of the feed-water is raised to that of the generator or nearly so, and the greater
part of the impurities contained therein solidified and deposited before the water
enters into circulation and reaches the steam-generating surfaces.
The feed-pipes are arranged in two separate systems, so that either one or the
other set can be removed and cleaned without stopping or interfering with the
effective working of the generator.
The drum E has a large steam-space and communicates by means of lateral
enlargements e el and two water-chambers d d with the front or upper extremities
of the two sets of inclined heating tubes D D'. The opposite end of the steam
and water drum E is in communication, by means of a down pipe e², with the water-
drum e, to which two water-chambers are connected. To these water-
chambers, the rear or lower extremities of the two sets of inclined heating tubes D D'
are respectively attached, and receive their supply therefrom.
Behind the fire-brick walls B of the combustion-chamber are two sets of feed-
pipes C, each fitted with stop-valves and independently connected with the
generative portion of the boiler, so that either set may be shut off at will. These
pipes may be horizontal, vertical or inclined.
f
The steam, after leaving the steam-dome E may be led through pipes
arranged in the upper part of the brickwork chamber, and thus be dried or
superheated.
If, owing to proximity of the generator to dwellings or for other reasons, it be
deemed preferable, the steam- and water-drum E may consist of a group of tubes
and may be placed above the roof of the combustion-chamber, whilst the heating
tubes are arranged along the walls on either side as before described, or along the

page_text: side walls and beneath the roof; the incandescent gases not circulating amongst
and between the tubes according to the usual practice, but burning freely in
the combustion-cliamber and ultimately bathing the pipes containing the fresh feed-
water.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
:-
1. The improved steam generator constructed and operating substantially as
described with reference to the accompanying drawings.
2. In a steam generator wherein the heating surface or a large portion thereof is
arranged on the water-tube' system, placing the heating tubes on either side of a
combustion chamber extending approximately their entire length, substantially as
herein described; the said tubes deriving heat by radiation instead of by intimate
contact with the incandescent gases.
3. In a steam generator, the combination, with the combustion-chamber A and
the groups of water-tubes D D' arranged on either side thereof, of the feed-water
heating tubes C C, enclosed in chambers formed outside the walls of the com-
bustion-chamber and through which the heated gases ultimately pass, bathing the
said heating tubes, substantially as and for the purpose set forth.
Dated this 1st day of March 1892.
G. G. M. HARDINGHAM,
191, Fleet Street, London, EC.C., Chartered Patent Agent.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.