An Improved Steam-generator.
Year: 1890

page_text: Date of Application, 26th Apr., 1890-Accepted, 1st Nov., 1890
COMPLETE SPECIFICATION.
An Improved Steam-generator.
I, GUSTAV DÜRR, of Ratinger, near Düsseldorf, in the Kingdom of Prussia, German
Empire, 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 :—
The present invention consists of an improved steam-generator of the water-tube
type; its object being to provide a steain-generator having an increased area of
heating surface, an improved circulation, and in which the consumption of fuel is
economized.
In the accompanying drawings,
Fig. 1 is a longitudinal section and
Fig. 2 a plan of a steam-generator constructed in accordance with the present
improvements.
Figs. 3 and 4 are views shewing a modified form.
Fig. 5 is a cross section corresponding with Figs. 1 and 2.
In Fig. 1, two groups a a of water-tubes are arranged beneath two water-drums A
and B. Each group of water-tubes is fixed independently. Chambers b b serve to
effect communication between the several water-tubes in each of the groups a a. The
left-hand group a of water-tubes is connected with the drum A by the tube c and with
the drum B by the tube h; the right-hand group a being connected with the drum A
by the tube g and with the drum B by the tube d.
The water circulates in the usual manner from the left-hand group a of water-tubes
to the drum A, and through the tube d from the right-hand group a of water-tubes to
the drum B. Water flows back through the two tubes g and h. The feed is admitted
through the pipes i i. The water fed into the drum B together with the water flowing
from the right-hand group a of water-tubes by way of the tube d into the drum B
flows through the tube into the left-hand group a of water-tubes. The water flowing
from the left-hand group a of water-tubes into the drum A by way of the tube c flows
into the right-hand group a of water-tubes through the tube g, meeting on its way
the feed-water entering through the pipe i. Steam generated in the left-hand group a
of water-tubes passes into the drum A through the tube c and thence through the
tube c into the steam-drum C; steam generated in the right-hand group a passing
through the tube d into the drum B and thence through the tube into the steam-
drum C. The direction of circulation is indicated by arrow-heads on solid and broken
lines.
The construction shewn in Figs. 3 and 4 is substantially the same as that shown
in Figs. 1 and 2, with the exception that the water-tubes are inclined in the opposite
directions; the firing being done beneath instead of on the sides of the generator.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
A steam-generator in which two separately-fired groups of water-tubes communicate
with water and steam-drums in such a manner that the water circulates backwards
and forwards between the two groups of water-tubes.
Dated the 26th day of April 1890.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Agent for the Applicant.