Improvements in or relating to "Fuel Economisers," or Apparatus for Heating the Feedwater for Steam Boilers.
Year: 1896

page_text: Date of Application, 14th May, 1896-
Complete Specification Left, 12th Feb., 1897-Accepted, 1st May, 1897
Improvements in or relating to "Fuel Economisers," or Apparatus
for Heating the Feedwater for Steam Boilers.
I, DAVID RUSHWORTH, of 92 Manchester Old Road, Heaton Chapel, near
Stockport, in the County of Lancaster, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention has reference to the apparatus for heating feed water for steam
boilers by means of the waste heat from the furnace, commonly called "fuel
economisers."
scrapers,"
In this apparatus it is customary to provide appliances, termed "
which traverse the pipes for the purpose of removing any soot or the like
deposited thereon, the soot as it is removed falling into the soot chamber
below.
The removal of this soot from the soot chamber has hitherto mostly been
indifferently and negligently performed by manual labour, resulting in the
unsatisfactory working of the economiser and frequently necessitating repairs and
renewal of the parts owing to corrosion.
The object of this invention is to provide mechanism or appliances for
mechanically and effectually extracting the soot from the soot chamber, and also
assist in promoting a more thorough removal of the same from the pipes and other
parts of the economiser.
The invention consists essentially in the application to the economiser of a fan or
blower of any suitable construction or design, for producing a strong current to
withdraw or extract the soot at intervals as may be desired.
In carrying out the invention the soot chamber of the economiser will preferably
be constructed with inwardly sloping or inclined sides, and with the bottom inclined
downwards towards the delivery end, or in the direction of the exterior of the
economiser. At the delivery end of the soot chamber a pipe trunk or the like,
with gradually constricted orifice or opening if preferred, passing through the wall
of the economiser will establish communication between the soot chamber and the
exterior. This pipe or trunk on the outside will preferably be constructed with a
flat ged opening to which the inlet branch of a fan or blower of any suitable
construction or design will be coupled up or attached. The fan or blower will be
provided with an arın or branch attached to the outlet for delivering the soot into
a pit or the like from which it may be removed by hand or elevator, conveyer or
in any other convenient manner. This delivery branch will be provided with an
air-tight cover or valve to prevent the entrance therethrough of cold air to the
economiser. The soot chamber or other part of the economiser will also be
provided with one or more suitable inlet valves pipes or openings to regulate the
admission of air when the fan or blower is running.
It will of course be obvious that the soot chamber instead of being constructed
as above described may be otherwise arranged. For instance it might be
constructed with an inclined trunk or pipe provided with a number of flanged
inlets to which inlets inclined or sloping plates or deflectors would conduct the
soot; or each inlet might communicate by means of a short arm or branch with the
adjacent one or with a commou delivery pipe or trunk coupled up with the blower
or fan

page_text: In large economisers two or more fans or blowers may be employed and the soot
chamber inclined in each direction from the centre, being provided at the centre
with a swivelling damper or valve to effectively direct the current through the
economiser.
The blower or fan may be driven from a pulley on the shaft provided for
driving the scrapers or motion may be imparted to it in any other suitable or
convenient manner.
D 10.1 1
1000
DAVID RUSHWORTH.
Improvements in or relating to "Fuel Economisers," or Apparatus
for Heating the Feedwater for Steam Boilers.
I, DAVID RUSHWORTH of 92 Manchester Old Road Heaton Chapel, near
Stockport, in the County of Lancaster, 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 has reference to the apparatus for heating the feed water of
steam boilers by means of the waste heat from the furnace commonly called "fuel
economisers."
In this apparatus it is customary to provide appliances, termed "scrapers
which traverse the pipes for the purpose of removing any soot or the like
deposited thereon, the soot as it is removed falling into the soot chamber
below.
The removal of this soot from the soot chamber has hitherto mostly been
indifferently and negligently performed by manual labour, resulting in the
unsatisfactory working of the economiser and frequently necessitating repairs and
renewal of the parts owing to corrosion.
The object of this invention is to provide mechanism or appliances for
mechanically and effectually extracting the soot from the soot chamber, and also
assist in promoting a more thorough removal of the same from the pipes and other
parts of the economiser.
The invention consists essentially in the application to the economiser of a fau
or blower of any suitable construction or design, for producing a strong current
to withdraw or extract the soot at intervals as may be desired.
On the accompanying drawings, in which sufficient of a fuel economiser is shown
to illustrate same and wherein
Fig. 1. is a lougitudinal elevation partly in section and Fig. 2. a cross section of
a fuel economiser showing my invention applied thereto.
Figs. 3. 4. aud 5 are longitudinal views (partly in section) of the lower parts of
"economisers" showing other modifications or arrangements of my invention
applied thereto.
In carrying out the invention the soot chamber a of the economiser will
preferably be constructed with inwardly sloping or inclined sides, and with the
bottom inclined downwards towards the delivery end b as shown, or in the direction
of the exterior of the economiser. At the delivery end of the soot chamber a pipe
or trunk c or the like, with gradually constricted orifice or opening if preferred,
passing through the wall of the economiser will establish communication between
the soot chamber a and the exterior. This pipe or trunk on the outside will
preferably be constructed with a flanged opening d to which the inlet branch of a
ian or blower e of any suitable construction or design will be coupled up or
attached.

page_text: The fan or blower will be provided with an arm or branch f. attached to the
outlet for delivering the soot into a pit g or the like from which it may be removed
by hand or elevator, conveyor or in any other convenient manner. This delivery
branch will be provided with an air tight cover or valve h to prevent the entrance
therethrough of cold air to the economiser, when the apparatus is not at work.
The soot chamber or other part of the economiser will also be provided with one
or more suitable inlet valves, pipes, or openings, i to regulate the admission of air
when the fan or blower is running.
It will of course be obvious that the soot chamber instead of being constructed
as above described may be otherwise arranged. For instance it might be constructed
with an incline trunk or pipe as shown in Fig. 4. provided with a number of flanged
inlets j to which inlets, inclined, or sloping plates or deflectors k would conduct the
soot; or each inlet might communicate by means of a short arm or branch with.
the adjacent one or with a common delivery pipe or trunk coupled up with the-
blower or fan as shown in Fig. 5.
In large economisers two or more fans or blowers may be employed and the soot
chamber inclined in each direction from the centre as shown in Fig. 3. of the
drawings, being provided at the centre with a swivelling damper or valve m to
effectively direct the current through the economiser.
The blower or fan may be driven from a pulley n on the shaft provided for
driving the scrapers, or motion may be imparted to it in any other suitable or
convenient manner.
It will be evident that this arrangement of fan or blower can also be effectively
applied to superheaters and the like, fixed in the flues on the principle of
economisers and whether provided with scrapers and scraper mechanism or not.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I.
claim is
1. The use and employment of a fan or blower applied to or connected with a
soot chamber of a fuel economiser for the purpose of withdrawing or forcing the
soot therefrom through a suitable arrangement of pipes, connected and operating
substantially as and for the purpose hereinbefore described and illustrated in the
accompanying drawings.
11 Jan of Wahmuar 1897
DAVID RUSHWORTH.