Improvements in Feed Water Heating Apparatus.
Year: 1897

page_text: Date of Application, 25th Oct., 1897-Accepted, 4th Dec., 1897
Improvements in Feed Water Heating Apparatus.
We, ELIHU KING JONES, Mill Man, and THOMAS NEWTON WILSON, Machinist, both
of Fulton, County of Multnomah, Oregon, U.S.A., do hereby declare the nature
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 class of feed water heaters in which the water is forced
through hollow grate bars on its way to the boiler.
In the accompanying drawing Fig. 1 is a vertical section of a boiler furnace and a
side view of the boiler provided with the apparatus of the invention. Fig. 2 a
perspective view of the grate. Fig. 3 an enlarged vertical longitudinal section of the
main grate bar and the mud drum or separator attached thereto on line 3-3 of Fig. 2
looking in the direction of the arrow. Fig. 4 a section on line 4-4 of Fig. 3.
Fig. 5 an enlarged central sectional view of the mud druin or separator. Fig. 6 a
horizontal section of the main hollow grate bar on line 6-6 of Fig. 5. Fig. 7
a horizontal section of the separator on line 7-7 of Fig. 5. Fig. 8 a sectional view
shewing two of the hollow arms attached to a grate tube, one being in section and
the other in elevation. Figs. 9 and 10 are views of details.
.
A is a tubular boiler the back end of which is, by a large water circulating pipe B
having a stop cock b and check valve 21 (Figs. 5, 7), connected with a vertical mud
drum or separator C which is located in the bridge wall D and attached to the under
side of the rear hollow main bar
of the grate which is also partly embedded in the
front side of the bridge wall.
A feed pump (not shewn) is connected with the drum or separator C at c² (Fig. 5)
and the feed water passes thence into and through the hollow grate and then through
the small pipes G to the boiler A.
The chief parts of the grate are the large hollow main bar E arranged in, and
flush with the front side of the bridge wall D; the angular dead plate El at the
front end of the grate; a series of hollow tubes or main grate bars E2 and a series
of hollow or tubular arins E3. The tubes E3 of one section alternate with those of the
next adjacent section.
The main cast iron tube E is partitioned horizontally at e to form the passages 1, 2,
each of which has as many side openings as there are hollow bars E2 attached to the
bar E. The tubes E2 have also a partition e¹ forming two passages 3, 4. They are
secured to the main tube E by bolts or screws passing through the flange at the ends
of the tubes E2 which take against flat surfaces as shewn. The front ends of the
tubes E2 rest upon the ledge of the dead plate E'. The tubular bars E³ (Fig. 8).
screw into threaded sockets formed in the sides of bars E2. Each bar E3 has a
central horizontal division plate or partition 6 of somewhat less length than the bar
so that a space is left at the outer end of the latter for the passage of water from
the bottom passage 31 to the upper one 4¹. In the inner end of each arm is a hollow
cylindrical head E' having a slot 7 (Fig. 10) on one side to receive the partition 6
and on the other a nozzle or central tubular projection 9 that fits closely in a socket
formed in the side of bar E and communicating with the upper passage 4 of the
The head E has a transverse partition 10 (Figs. 9, 10) corresponding to
and in alignment with the partition 6 and forming practically a continuation of
same.
Price Rd77

page_text: the latter. The heads E
corresponding notches 12
rotation of the heads.
are provided externally with lateral lugs 11 fitting
(Fig. 9) in the tubular bar E³ and serve to prevent
The small pipes G (Figs. 1, 2, 3, 4) attached to the upper side of the main grate
bar E extend upward and connect with a common head H located near the top of the
rear end of the boiler and having the form of a horizontal tube. From it extend
the pipes L through the end of the boiler and are provided with stop cocks or
valves 13.
The body of the mud drum or separator C is taper at its bottom end where a
blow off pipe F having a stop cock or valve f (Fig. 1) is attached. The separator is
bolted to and suspended from the under side of the main grate bar E. A central
partition 14 (Fig. 5) extends downward to the extent of about half the height
of the separator and is provided with two openings 15, 16, with hinged pendent
check valves 17, 18, opening in opposite directions. An inclined partition 19 joins
the lower end of the partition 14 with the side of the separator. These partitions
divide the separator into two compartments c², c³. A perforated plate or screen 20 is
arranged in an inclined position to cover the upper valve opening 15. The pipe
leading to the pump (not shewn) is attached below the partition 14, and the mouth
of pipe B is provided with a hinged check valve 21 (Fig. 5).
It is obvious that if the valve b of pipe B is closed and valve 13 of pipe I opened,
water entering the separator C from the pump pipe will pass, as indicated by the
single head arrows, through the perforated screen plate 20 and past the valve 17 into
the lower passage 1 of grate bar E and passing thence through the bars E² and E3
will return heated to the upper passage 2 and, through pipe G, head H and pipes I
into the boiler. In this the valves 17, 18, respectively open and close automatically.
The screen 20 serves to strain the water passing through it and the foreign matters
collect in the lower end of the separator. Some scale or the like is also deposited in
the pocket or compartment c and collects on the inclined partition 19 on which it
slides down to the valve opening 16.
Upon opening the cock 13 of pipe I and valves b and ƒ of pipes B and F, water
will discharge from the boiler through the separator C and pipe F as indicated by
double headed arrows. In this the valve 17 closes and valve 18 opens automatically,
and the scale or sediment in the pocket c² is blown through opening 16 into the
compartment 3 of the separator whence it passes to pipe F.
When the valve f of blow off pipe F is closed and valves b and 13 of pipes B and I
are opened, water will pass from the boiler through pipe B, separator C, grate, and
pipes G, I, so that steam may be generated quickly and largely. In this the check
valve b in the separator C comes into action.
It will be seen that a practically equal distribution and circulation of water in all
parts of the grate are assured, and since normally all the water from the pump passes
through the grate before entering the boiler it is delivered to the latter highly heated
or partly converted into steam. The arrangement is such that the circulation is
upward and the water enters and leaves the hottest part of the grate. The bars E,
E2, E³, being provided with longitudinal partitions are practically converted into
double tubes whereby material and space is economised.
Having now particularly described and ascertained the nature of our said
Invention and an what manner the same is to be performed, we declare that what we
claim is :-
1. The combination with a steam boiler of feed water heating apparatus composed
of a main grate bar having parallel longitudinal passages, a series of minor grate bars
having like passages and joined to the main grate bar, whereby the respective passages
communicate and a series of transverse bars connecting the main grate bar with the
upper part of the boiler, and a pipe connecting the lower portion of the boiler with
the grate, substantially as described and shewn.
2. The combination with a steam boiler of a feed water heating apparatus composed
of a main grate bar having separated longitudinal passages, a mud drum or separator

page_text: connected with the lower passage of the same and having a blow off attachment, a
series of minor grate bars having parallel longitudinal passages communicating with
the respective passages of said main grate bar, pipes leading from the upper portion
of the latter into the upper part of the boiler and a pipe leading from the lower part
of the boiler to the separator, substantially as described and shewn.
3. In a feed water heating apparatus, the combination with a series of grate bars
having longitudinal passages, of a series of transverse bars or arms having a partition
that is separated from the free end of the bar, whereby the latter is provided with
upper and lower passages communicating respectively with the upper and lower
passages of said series of grate bars, substantially as described and shewn.
4. In combination with the parts specified in claim 3 a hollow apertured head
arranged in the inner end of each transverse bar or arm and serving as a support for
the partition which divides the bar or arm longitudinally, substantially as described
and shewn.
5. In a feed water heating apparatus the combination with the hollow grate bar, '
of a mud drum or separator and pendent from the latter, and having an annular
partition that divides its chamber and is provided with openings and automatic
check valves sealing in opposite directions, substantially as described and shewn.
6. In a feed water heating apparatus the combination with the boiler, hollow grate
and pipes G connecting the grate with the boiler, of the pipe B and separator C
having an apertured and valved partition, and pump and blow off pipes provided
with valves, substantially as described and shewn.
7. The general arrangement and combination of parts constituting the feed water
heating apparatus substantially as described and shewn.
Dated this 25th day of October 1907
THOMAS R. SHILLITO,
89 Chancery Lane, London W.C. Agent for the Applicants.
THOMAS R. SHILLITO,
89 Chancery Lane, London W.C. Agent for the Applicants.