Improvements in Steam Bollers.
Year: 1890

page_text: CUM LEIC
L
Improvements in Steam Bollers.
I, BURHANS VAN STEENBERGH, of the town of Goshen, County of Orange, and
State of New York, United States of America, Gas 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 steam generators, and more particularly to that class of
generators known as sectional steam boilers.
The object of the invention is to obtain and utilize a maximum of heat from a
minimum supply of fuel. By the peculiar construction and arrangement of my
furnace and the water tubes and steam drum therein I utilize the heat and economize
the fuel to the best advantage.
In carrying out my invention, for the construction of my improved steam boiler, I
provide a series of lateral rows of nearly upright but slightly inclined water tubes,.
having fire flue tubes passing through them, and each row of inclined tubes connecting
at top and bottom with horizontal water heads or tubes, the bottom water heads being
connected outside of the furnace with a common feed pipe, and the top water or steam
heads being connected with a common central steam drum arranged in the super-
heating flue, which connects the furnace with the chimney. The upright water tubes
are inclined from toward the front of the furnace at the top backward toward the
bottom and diagonally to the grate surface. I also provide the rear wall of the
furnace with an inwardly and upwardly inclined deflector projecting into the com-
bustion chamber, and above such deflector I arrange a horizontal partition projecting
from the front wall of the furnace above the inclined water tubes and below the steam
drum, and provide such partition with openings and dampers for controlling the
draught. I also provide an inclined bridge wall extending from the rear of the grate
to the rear wall of the furnace, and having an adjustable support by which the grate
bar surface may be increased or diminished as may be desired, according to the
quantity of steam demanded, or the kind of fuel to be used. By means of my
peculiar arrangement of the steam generating sections and the superheating steam
drum in connection with the inclined deflector, the horizontal partition and the
inclined bridge wail, the flame and heated products of combustion, are reverberated
and caused to pass from one side of the combustion chamber to the other in intimate
contact with the generating-sections or inclined tubes, and thence through the super-
heating flue in contact with the steam drum in the most efficient manner, thereby
securing economy of fuel and great rapidity in the generation of steam.
For the purpose of securing better action and a more uniform circulation of
water in all the sections of the boiler I provide a circulating pipe connecting
a horizontal rear water head at the bottom with one of the horizontal front
water and steam heads at the top. I also connect such circulating pipe and one
or more of the water heads at the bottom of the furnace by means of a valved pipe
with a mud drum located below the inclined bridge wall of the furnace, and such mud
drum is provided with a valved blow-off pipe for more conveniently cleaning the
boiler of dirt and sediment. I will now more particularly describe my invention in
connection with the accompanying drawings, in which,
Fig. 1 represents a vertical longitudinal section of a sectional steam boiler containing
my improvements.
Fig. 2 represents a vertical cross section of the same.
Fig. 3 represents an elevation in perspective, showing water circulation pipe and
connection to the mud drum.
on the furnace,
Fig. 4 also represents a perspective elevation showing the feed pipo
and the projecting end of the mud drum with its blow-off pipe and valve.
The furnace is preferably constructed with cast iron side and end walls made in

page_text: removable sections and bolted together; and such walls are lined with fire-brick and
ordinary red brick to retain the heat. Any suitable number of the sections of the
boiler may be readily removed for giving access to the interior of the furnace for
making repairs, and by means of the removable sections the furnace may be made
larger or smaller according to the size required. In the front wall C of the furnace
on a level with the grate is placed the fire door R, and below this is placed the ash
door S. The grate A is composed of bars resting at their rear ends upon a cross
piece g, which is secured by bolts h, h, to the sides i, i, of the case of the furnace,
and said sides i, i, are provided with horizontal slots j,j, so that said cross piece g,
may be secured farther from or nearer to the front wall of the furnace, by which
means the furnace may be adapted for a greater or less extent of grate surface. The
grate surface may also be reduced by covering the rear ends of the grate bars with
brick or tile to suit the consumption of fuel as desired. The inclined bridge D,
extends upward and backward from the grate to the rear wall of the furnace B.
The rear wall is provided some distance above bridge D with an inclined deflector E,
extending across the furnace and inclined inward and upward as shown so as to
project into the fire box or combustion chamber F. The fire box or combustion
chamber is provided at the top just above the upper horizontal water tubes with a
horizontal crown G composed of tile supported upon the cross bars H. This crown
or partition extends across the furnace from the front wall thereof back to near the
rear wall, leaving, however, a passage I, between it and the rear wall of the furnace.
It will be observed that the crown G is some distance above the inclined deflector,
projecting from the rear wall of the furnace, so that flame and hot products, which
are reverberated and caused to pass forward by the deflector are again caused to pass
backward through the furnace by such crown G. The products of combustion pass
through the large opening I into the top flue J, which is provided between the crown
and roof of the furnace, and which conducts said products forward to the chimney K
leading from the front end of said flue. Within the flue J is arranged centrally and
longitudinally the steam drum L. In the fire box or combustion chamber below the
crown G are arranged horizontal water tubes or heads M, each of which is provided
with a central upwardly extending neck and flange N which connects with corre
sponding flanged necks extending downward from the steam drum L. In the lower
part of the fire box are arranged horizontal water tubes O, corresponding with the
number of tubes M, and the upper and lower series of horizontal water tubes M
and are connected by the rows of upright water tubes P set at an equal distance
apart for the flame to pass between them. The horizontal water tubes M and O are
preferably made of cast steel, while the upright or inclined tubes P are preferably
made of wrought iron, and such wrought iron tubes are expanded into the openings
of the horizontal tubes so as to make perfectly tight joints. The horizontal water
tubes are provided with hubs having openings into which the tubes P are fitted.
The tubes are arranged parallel between the longitudinal vertical sides of the
furnace, but in the longitudinal direction of the furnace said tubes are arranged in an
inclined position, or diagonally to the grate as shown; each of said tubes P is provided
with a longitudinal flue tube Q, placed centrally therein and passing through the top
and bottom of water tubes M and O, being also expanded therein to form tight joints.
The water tubes O, have each a flange on the outside of the furnace through the side
of which they all pass as shown in Figures 2 and 4; and the feed water pipe T has
also corresponding flanges, so that said feed pipe is connected with each of the
tubes O, and each may be fed from said pipe T. The most forward water tube M
is also provided with an outside flange, to which the vertical tube U may be connected
at its upper part, the lower end of the same being connected with the feed pipe T.
To said pipe U, is attached the water glass gauge V, also the gauge cocks W, W, at
and above the water level, which, in this boiler, is at about the top of the tubes P.
As shown in figure 4 the outer ends of the water tubes M and O' are connected on
the outside of the furnace by inclined tubes P for securing better circulation of the
water. As shown in figure 3 a circulating water pipe k connects the forward
horizontal water tube M with the rear water tube O, and with the lower end of

page_text: pipe & connects pipe I, which is connected by pipe m, having valve n, with mud drum o.
This mud drum is arranged in the space at the rear of the grate and below the
inclined bridge D, and is provided at its opposite end with a blow-off pipe and valve p,
shown in figure 4. The steam drum L is provided at the top with a safety valve ✗,
from which extends pipe Y to conduct steam to the engine. The chimney K,
connecting with flue J, is furnished with one main damper d to regulate the draught
during the usual generation of steam. For the purpose of producing a rapid
combustion when a rapid generation of steam is required, or when the fire has
become too low, or when the fire requires to be kindled anew, I provide the furnace
with the damper a, a, arranged upon the crown G, which is provided with openings b, b,
directly above the grate and under the chimney to allow a direct draught to pass
into the chimney and cause rapid combustion of the fuel. Each of said dampers a, a
has a rod and handle e, projecting on the outside of the furnace, so that they may be
readily closed or opened.
In the furnace as constructed the grate surface may be varied from eight to twenty-
five square feet, suitable for rapid or slow generation of steam, according to the
purpose for which it is employed. This boiler has a heating surface of over seven
hundred square feet, of which about thirty feet are used for superheating surface, and
nearly all of the remainder is fire surface." It has an ample water face of thirty cubic
feet, and a steam face of fourteen cubic feet. Its constraction is simple and of small
expense, still it possesses great strength and durability, suitable for very high pressure.
By means of the steam drum arranged in the superheating flue the steam is well dried
and superheated.
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. In a sectional steam generator the combined water and flue tubes arranged in an
inclined position, as shown, and connected at the bottom and top with suitable water
and steam tubes, in combination with a circulating pipe, and valved discharge pipe
connected with water tubes at the bottom, and an inclined deflector at the rear of the
furnace, substantially as, and for the purpose, described.
2. In a sectional steam generator the combination of the inclined sections having
water and steam connections at the bottom and top, the circulating pipe, connected
with the sections at the bottom and top as described, the mud-drum, connected with
the said pipe and arranged below the inclined bridge wall D, the deflector E, and the
crown or partition G, substantially as, and for the purpose, described.
3. In a sectional steam generator the combination of the inclined water tubes
having internal flue tubes, the water pipe connections at the bottom of the inclined
water tubes, a steam super-heating drum connected with the tops of such tubes, the
water circulating pipe and the connecting mud drums arranged as described, the
inclined reverberatory deflector E and the crown or horizontal partition having
openings and controlling dampers and forming above it a super-heating chamber
containing the steam drum, all arranged substantially as, and for the purpose,
described.
4. In a sectional steam generator having steam generating sections, a water
circulating pipe and a mud drum connected as above described; the combination
and arrangement of the inclined bridge wall placed above the mud drum, the inclined
reverberatory deflector and the crown or horizontal partition by which the flame and
hot gases are made to follow a forward and then a backward direction or course
through the tubular sections in the manner shown and described.
5. In a sectional steam generator, having steam generating sections and a connected
mud drum arranged at the rear part of the furnace, the inclined bridge wall above
the mud drum, in combination with the adjustable vertical support for the grate bars
by which the grate surface may be increased or diminished as may be desired
according to the quantity of steam demanded or the kind of fuel to be used, all
arranged as described,

page_text: 6. In a sectional steam generator, the enclosing furnace having an inclined
bridge, D, an inclined deflector E, a crown G, provided with openings I and forming
the super-heating flue J, in combination with the tubular sections P, flue tubes Q,
the water tubes M and O, the steam drum. L, feed tube T, circulating pipe k and mud
drum 0, all arranged and operating as herein describeut.
Dated thie 25th day of Febrn 1890
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.