Improvements in and connected with Fuel Economisers for Heating Feed-water for Steam Boilers.
Year: 1892

page_text: Date of Application, 23rd July, 1892
Complete Specification Left, 10th Apr., 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in and connected with Fuel Economisers for Heating
Feed-water for Steam Boilers.
I, EDWIN TOPHAM, of 110 Thomas Street, Miles Platting, Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention relates to the construction and arrangement of that type of
fuel economisers employed with steam generators in which the feed water is
passed through a series of vertical pipes exposed to the heated gases issuing from
the generator flues or furnaces.
In such economisers, the pipes are commonly arranged in parallel rows, each row
being connected with top and bottom boxes respectively.
According to my improvements I connect two of the parallel rows of vertical
pipes with one top box, and with one bottom box, respectively, and thus form the
economiser in twin sections instead of in single sections as hitherto. I may arrange
the pipes in the rows as at present, in lines at right angles with the rows, but I
prefer to arrange them diagonally, so that the pipes in one row are in line with the
spaces in the next row. They may be fitted into branches or pockets cast with
the bottom boxes, and into suitable openings formed in the top boxes, caps being
fitted and secured above these openings to permit access to the insides of the
vertical pipes.
This construction and arrangement, enables the economiser to be erected with
about one half the number of joints in the connecting and circulating pipes which.
are at present required; prevents to a great extent, or wholly, the accumulation of
soot and dust above the bottom boxes and around the bottom of the pipes; promotes
a quicker movement of the cool water in the bottom boxes and thus reduces the
difference of temperature between them and the upper parts of the pipes and
prevents the deposition of mud and scale to a great extent; offers less obstruction
to the passage of the gases; and reduces the total cost of installation.
Dated this 21st day of July A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and connected with Fuel Economisers for Heating
Feed-water for Steam Boilers.
I, EDWIN TOPHAм, of 110 Thomas Street, Miles Platting, Manchester, 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 relates to the construction and arrangement of that type of fuel
economisers employed with steam generators in which the feed water is passed
through a series of vertical pipes exposed to the heated gases issuing from the
generator flues or furnaces.
In such economisers, the pipes are commonly arranged in parallel rows, each row
being connected with top and bottom boxes respectively.
According to my improvements, I connect two of the parallel rows of vertical
pipes with one top box, and with one bottom box respectively, and thus form the
economiser in twin sections instead of in single sections as hitherto. may arrange
D17

page_text: the pipes in the rows as at present, in lines at right angles with the rows, but I
prefer to arrange them diagonally so that the pipes in one row are in line with the
spaces in the next row. They may be fitted with branches or pockets cast with
the bottom boxes and into suitable openings formed in the top boxes, caps being
fitted and secured above these openings to permit access to the insides of the
vertical pipes.
I will more particularly describe my said invention with reference to the
accompanying drawings in which
Figure 1 represents a front view;
Figure 2 an end view of two sections; and
Figure 3 a sectional plan taken along the line -y Figure 2.
Figure 4 is a vertical transverse section through a twin section, drawn to an
enlarged scale, the middle portions of the vertical pipes being broken away.
Figure 5 is a partial plan of a twin section.
In each of the figures in which the respective parts are represented, A A are
the vertical pipes, B is the top box, and C the bottom box. Each section of the
economiser constructed according to this invention consists of two rows of vertical
pipes A, one top box B, and one bottom box C. The pipes A A are arranged in
parallel planes either one behind the other or as shewn by Figure 3, and by
preference with each pipe of the second row behind an opening or space in the
front row, and they are fitted into their boxes in the ordinary well known manner.
The bottom boxes C are formed with open topped side pockets D D for the
reception of the bottoms of the vertical pipes, an equal or suitable number of these
pockets being arranged on each side. At each end they are also provided with
necks E E, which may be flanged at their outer ends and have projecting ribs F F
cast upon them. The necks are built into the side walls G and the ribs prevent
any possible rotation of the boxes. One of the necks E of each bottom box is
connected to the water supply, and the other may be either closed or connected to
a blow-off pipe. This connection is best effected on each side by short lengths of
pipe H H having two side branches J J. (These branches on the outlet side are
omitted from the drawings, but (if used) resemble those on the inlet side.) The
bottoms of the boxes are preferably cast with a slight dip or fall from the inlet to
the outlet side, to facilitate the blowing off or removal of mud or sediment. It will
be understood that the outlets (when used) are normally closed whilst the apparatus
is at work.
The top boxes B L are constructed with pockets K on their under sides for the
reception of the two rows of pipes, corresponding with the similar pockets formed
on the bottom box, and the upper faces of these boxes are provided in the usual or
any suitable manner with covered openings L L through which the pipes may be
inserted and removed and through which access is obtained to the interior of the
pipes when required. The top box is also provided with the usual branch M. by
means of which the heated water is led off from the economiser through pipes to
which the branch is connected.
This construction and arrangement enables the economiser to be erected with
about one half of the number of joints in the connecting and circulating pipes which
are at present required; prevents to a great extent or wholly the accumulation
of soot and dust above the bottom boxes and around the bottom of the pipes ;
promotes a quicker movement of the cool water in the bottom boxes and thus
reduces the difference of temperature between them and the upper parts of the
pipes and prevents the deposition of mud and scale to a great extent; offers
less obstruction to the passage of the gases; and reduces the total cost of
installation.
It also provides greater spaces between the bottom boxes and consequently a
greater heating effect. As a result, the condensation of the condensible portions
of the hot gases (or the effect known as sweating") is avoided.
The pipe scrapers and other, accessories are constructed and arranged in the
usual or in any suitable manner.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. In a fuel economiser of the type set forth, the combination and arrangement
with a single top box and a single bottom box of two rows of vertical pipes,
the boxes and pipes thus constituting a twin section, substantially as and for
the purpose hereinbefore described and as illustrated by the accompanying
drawings.
2. In a fuel economiser of the type set forth, a bottom box having on each side
a row of open topped pockets for the reception of the lower ends of two rows
of vertical pipes, constructed and arranged substantially as herein before described
and as illustrated by the accompanying drawings.
3. In a fuel economiser of the type set forth a top box having two rows of
openings for the reception of the upper ends of two rows of vertical pipes,
constructed and arranged substantially as hereinbefore described and as illustrated
by the accompanying drawings.
Dated this 6th day of Anril A D 1802
WILLIAM E. HEYS,
Agent for the Applicant.