Improvements in Steam Boilers and in Means for Heating the Water in same.
Year: 1898

page_text: Date of Application, 26th Mar., 1898
Complete Specification Left, 24th Dec., 1898-Accepted, 4th Feb., 1899
Improvements in Steam Boilers and in Means for Heating the Water
in same.
I, JAMES COURTHOPE PEACHE, of St. Albans, Creffired Road, Colchester, in the
County of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to improvements in steam boilers and in means
for heating the water in same and the objects of it are, to minimise the wear and!
tear of such boilers due to the action of furnace gases, and to simplify their con-
struction generally.
My invention consists chiefly in the means by which heat is transferred from the
source of heat to the water in the boiler to be evaporated.
In carrying out my invention I employ a closed pipe circuit, this pipe circuit is
filled with water or other suitable fluid. Part of this circuit passes through a fur-
"steam boiler," down through
nace, thence upwards and into the upper part of a
the water contained in this boiler, out again through the lower part of the boiler
and so back to the furnace. The fluid in this coil is heated in the furnace and
thus a circulation is set up in the system, the fluid giving up heat to the water in
the boiler as it traverses this part of the circuit. Any number of separate circuits
can be used in one boiler and furnace, and the pipe composing each circuit can be
coiled or otherwise arranged to give a large heating surface where it passes
through the furnace and also where it passes through the boiler.
The boiler can be made of a simple and strong form as it has not to be shaped
to receive furnace gases.
The closed pipe circuit may be filled with distilled water or with any fluid
which will not form a deposit in the pipe and thus will work without deposit of
scale in the part subject to the heat of the furnace.
Dated the 26th day of March 1898.
0 TICUT
BRTCTT
PHILLIPS & LEI
Agents for the Applicant.
Improvements in Steam Boilers and in Means for Heating the Water
in same.
I, JAMES COURTHOPE PEACHE, of St. Albans, Creffield Road, Colchester, in the
County of Essex, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The present invention relates to improvements in steam boilers and in means
·

page_text: for heating the water in same and the objects of it are to minimise the wear and
tear of such boilers due to the action of the furnace gases, to simplify their con-
struction and to minimise the attendance necessary for their working.
My invention consists chiefly in the means by which heat is transferred from the
furnace or other source of heat to the water in the boiler to be evaporated.
In carrying out my invention I employ a closed pipe circuit. This pipe circuit
is filled with water or any other suitable fluid. Part of the circuit passes through
a furnace or other source of heat, thence upward and into the upper part of a
steam boiler containing the water to be evaporated, down through the water con-
tained in this boiler, out again through the lower part of the boiler and thence
back again to the furnace or other source of heat.
The fluid in this closed pipe circuit is heated in the furnace and thus a circula-
tion is set up in the system, the heated fluid giving up its heat to the water con-
tained in the boiler as it traverses that part of the circuit.
Any number of separate circuits can be used in one boiler and furnace or
generator as the two combined may be conveniently designated and the pipe or
pipes composing each circuit can be coiled or otherwise arranged to give a large
heating surface where it passes through the furnace or traverses the source of
heat, and also a large surface where it passes through the water in the boiler.
The employment of this method of heating the water enables the boiler to be
made of a simple and strong form, as it has not to be specially shaped to receive
furnace gases.
The closed pipe circuit or circuits may be filled with distilled water or with any
fluid which will not form a deposit in the pipe or pipes and thus will work con-
tinuously without deposit of scale in the part subject to the heat of the furnace.
In order that my invention may be fully understood I have appended
hereto drawings illustrating it and will now proceed to describe it in detail with
reference to the said drawings, in which:
Figure 1 is a vertical sectional elevation of my generator having a closed pipe
circuit composed of two helically coiled pipes connected together-so as to form
one continuous pipe circuit.
Figure 2 is a vertical sectional elevation of the generator having a number of
independent closed pipe circuits for transmitting the heat from the furnace to
the water in the boiler.
Figure 3 is a plan view of Figure 2; the furnace being omitted for the sake of
clearness.
C
a is the furnace and b is the boiler, both of which may be conveniently and
advantageously constructed as shewn, but any other suitable form of either might
be substituted for these without departing from the essence of my invention
which lies in the means whereby the water in the boiler is heated without sub-
jecting the boiler to the distinctive action of the usual furnace gases; the pipe
or pipes constituting the closed circuit which as above stated is filled with dis-
tilled water or other suitable fluid. In Figure 1 this circuit, is composed of a
helically coiled pipe c fixed vertically as, shewn in the midst of the water in
the boiler, the lower end of this pipe c projecting out of the lower part of the
boiler and passing into the furnace a, where it is again coiled into a vertical
helix d and its upper extremity is brought out through the furnace wall and
carried up vertically and connected by means of a tee union to the upper extremity
of the coil c. The coal or other fuel is fed into this furnace through the top
opening d¹, the said fuel filling up the space below, above, in the middle of and
around the coil of pipe so that the fluid contained in the said closed circuit becomes
heated causing it to circulate in the direction indicated by the arrows. The
constant circulation of the highly heated fluid contained in the closed circuit and
the parting with some of its heat to the water in the boiler raises the temperature
of the said boiler water to the evaporation point and the resulting steam may be
⚫led away through the pipe c for any duty that may be required of it.

page_text: The arrangement shewn in Figures 2 and 3 illustrates by way of example a
convenient form of construction when independent pipe circuits are desirable.
a is the furnace, b the boiler, and c, c¹, c², c³, c, c, care each separate closed pipe
circuits. The arrangement of these pipes at the part within the furnace may con-
veniently and advantageously be such as to form fire bars for the fuel to rest upon
as shewn. The circuits here can be easily seen, and followed by the arrows and
will not need further description.
kk are plugs or caps on the top of the vertical extensions, to provide for filling
and letting out air etc., and the additional gage glass shewn on the boiler in
If
Figure 2 is provided to enable the said boiler to be worked at any level.
the water be allowed to fall to the level of the lower of these gage glasses, the
steam generated in the boiler will become more or less superheated by contact
with the part of pipe circuit above the level of the water.
Feed water is introduced into the boiler by a feed-pump or other ordinary
means.
The boilers are shewn fitted with an ordinary safety-valve f, gage glass g. and
man-hole h, and supported upon a stand i, but such (appliance and fitting form
no part of my invention and therefore their number may be substracted from or
added to at will, or according to requirements.
The system described above may be worked so as to keep the furnace going
constantly although steam may be taken from the boiler for a portion of the day
only. In this case after the day's use of steam is over the boiler would be
pumped up to its full level and the furnace being kept going the water would be
gradually heated up and steam raised until by the time the boiler was required
to give steam again there might be, say, a pressure of 250 lbs. per square inch..
During the working period the furnace would be kept going the water level
would gradually fall as the steam was used until at the end of the day's work the
water level would be much reduced and probably the pressure in the boiler would
also have fallen to say 100 lbs. or so. The cycle would then begin over again;
fresh water would be pumped in, the pressure of steam and temperature of water
in the boiler being thereby still further reduced etc.
Such a generator would require but little more attention than an ordinary
closed coil heating system and could be left for long periods without attendance
and without danger of destructive explosion.
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. A steam generator consisting of a separate boiler and furnace and one or more
closed pipe circuits containing water or any other suitable fluid part of which
circuit or circuits traverses the fuel in the furnace and part traverses the water
in the boiler, substantially as and for the purpose described and illustrated.
2. In a steam generator, the combination with a steam boiler and a furnace or
other source of heat, of one or more closed pipe circuits containing water or other
suitable fluid part of which circuit or circuits traverses the fuel in the furnace and
part traverses the water in the boiler, substantially as and for the purpose
described and set forth.
J
D
1
1000
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.