provements in and relating to Fuel Economisers for Heating- Boiler Feed Water.
Year: 1894

page_text: Date of Application, 11th July, 1894-Accepted, 11th Aug., 1894
COMPLETE SPECIALUATION
Improvements in and relating to Fuel Economisers for Heating-
Boiler Feed Water.
I THOMAS SYKES of 358 Stockport Road 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 :—
My invention relates to that class of fuel economisers in which the feed water is.
passed through vertical pipes exposed to the heat of the flue gases and has for its
object an improvement in the circulation of the feed water therein so as more
perfectly to heat the same.
In order that my said invention may be better understood and more ensily
carried into effect I have hereunto annexed a sheet of drawings wherein I have
shown so much of a fuel economiser as is necessary to illustrate the nature of my
said invention. In the drawings Fig. 1 is a vertical sectional view of the
application of my said invention to one pipe of a fuel economiser of ordinary
construction; Fig. 2 is a sectional view in plan through the liue G H in Fig. 1;
and Fig. 3 is a similar view to Fig. 2 showing a modification of my invention.
I am aware that an attempt has been made to improve the circulation within an
economiser by the introduction of a pipe of smaller diameter within the pipe.
ordinarily employed. In the previous attempt however the direction of the flow of
the feed water was changed from that ordinarily used and the construction adopted.
necessitated the use of boxes divided at the top and bottom. The feed water
entered first the upper division of the top box and then passed downward through
the inner pipe to the lower division of the bottom box from which it passed into
the upper division of the same box and was thus enabled to enter and ascend in the
outer pipe and be delivered into the lower division of the top box. Both ends of
the inner pipe were fully open. Thus the feed water flowed in two different
directions one downwards through the inner pipe and the other upwards through.
the space between the inner and outer pipes. This double direction of flow
obtained in the manner and by the aid of the special construction as described was
the essential feature of the previous attempt to improve the circulation of the feed
water through an economiser by the introduction of inner pipes of smaller diameter
into the vertical pipes of ordinary size.
In my invention I do not change the construction of the top and bottom boxes
nor the point at which the feed water enters which is as usual at the bottom box.
Instead of endeavouring to obtain a double direction of flow of the feed water my
invention has for its object the preservation of the usual direction of flow and
results in the better heating of the feed water in its passage.
In carrying my said invention into effect I introduce within each of the vertical
pipes A contained in the economiser and fixed in the bottom box E and top box F
pipe B of smaller diameter which can conveniently be retained in position within
the pipe A by distance pieces C. The pipe B is suspended by brackets D in the
manner shown but it may be held in its true vertical position in other ways as will
be readily understood. I close as shown in Figs. 1 and 2 the upper end of the
pipe B or it may be provided with a small hole or aperture as at K in Fig. 3 so as
to be partially closed. In this way the whole or the greater part of the feed
water entering the bottom box E is compelled to pass through the contracted
space J in rising into the top box F. I am thus enabled to heat the water more
rapidly and to a higher temperature.

page_text: 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
The combination with each of the vertical pipes of a fuel economiser of an inner
pipe closed or partially closed at its upper end and applied in the manner and for
the purpose substantially as described and illustrated.
Dated this 11th day of July 1894.
THOMAS SYKES.