Improvements in Steam Generator Furnaces.
Year: 1893

page_text: Date of Application, 1st July, 1893
Complete Specification Left, 28th. Feb., 1894-Accepted, 23rd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Steam Generator Furnaces.
GEORGE VICTOR PRIESTLEY, Basinghall Street Chambers Boar Lane Leeds
Engineer do hereby declare the nature of this invention to be as follows :—
"
In the furnace of the boiler, in place of having one set or series of grate bars,
there are two series, one above the other, each having a crown for the flames to
play against, the two series being separated by a number of horizontal tubes, which
form a platform for the cinders from the upper series of bars, and at the same time
become the "
crown of the lower series.
"
The invention may be more fully described as follows-
This improvement may be applied to any class of boiler, having a furnace of
4 feet or so in diameter.
It is usual to have one series of grate bars upon which the fuel is burnt.
In lieu of this, I have 2 series of grate bars, of any suitable length, one above
the other, called the upper and the lower, and that in the same furnace opening or
flue. Each series will possess a pair of doors to itself.
"
"
crown of the boiler,
< crown "for the second
The "
crown of the upper series will be the furnace "
(with the water above), but it will be necessary to create a
series below, else the grate bars of the upper series would be burnt away by the
flames on the lower series.
To do this-I place a number of horizontal round water tubes attached to the
furnace sides, thro' which tubes the hot water inside the boiler will flow and
circulate.
6
It will be seen, that these tubes if placed close together, will form a platform for
the cinders of the upper series to fall upon, and at the same time, they become the
crown "of the second or under fire. The clinkers from the upper set of grate
bars, are not raked out on this platform, but fall over the extreme end of the bars
into the pit at the end of the bars, and are raked out on the lowest level of the
furnace Alue beneath the second series of bars, as is usually done in boilers, having
only one series of bars.
If there are movable bars on the lower series, the same attachments in front
can be made to move the upper bars at the same time, and without further
mechanism.
By this method, I obtain the grate bar area of 2 furnace grates into one boiler,
thus saving one boiler & its fittings, the cost of setting etc.
Dated this 30th day of June 1893.
GEORGE VICTOR PRIESTLEY.
COMPLETE SPECIFICATION.
Improvements in Steam Generator Furnaces.
GEORGE VICTOR PRIESTLEY Basinghall Street Chambers Boar Lane Leeds
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 particularly relates to steam generators which consume a low
class of fuel, such as town's refuse, dust and any kind of combustible rubbish, also
coal if thought desill

page_text: It is especially applicable to Livet's steam generator No. 11,47200 when used as a
refuse destructor and steam generator, and which it greatly enhances in utility and
heating power.
When a low class of rubbish is consumed, in order to obtain a satisfactory
amount of heat in the furnace, it is necessary to have as large a grate area as
possible.
To accomplish this, I place 2 series of grate bars in the furnace flue, a higher
and lower level, on which the refuse is burut.
"
"
It is necessary that the furnace flue is made of sufficient diameter to allow two
series of grate bars in, together with ample air space underneath to feed them with
oxygen. The "
of the upper
of the furnace flue will form the "
crown
grate bars, but it is necessary to create a "crown" for the second series below with
a suitable air space between for the upper grate bars.
crown
To do this, I place a horizontal water tube outside the boiler front, and which
spans the furnace front as per drawing Fig. 1, and which is filled with hot water
from the boiler; into this tube, at right angles, I place a number of smaller tubes
running parallel with the flue at a slightly inclined rise, and which at their opposite
ends merge into another cross tube, as shewn at 5' Fig. 2. These tubes are made
with couplings to, so that they can be replaced if necessary without disturbing the
cross tubes 5 and 5. The hot water from the boiler will then have a circulation
thro' these tubes which form the " crown of the lower series of grate bars. To
prevent the couplings of these tubes from being injured by the flames, I cover
the back end of them with a piece of sheet iron, which can be renewed when
necessary.
"
The cross tube 51 is firmly rivetted to the furnace flue and acts as a stay. To
prevent ashes from the upper grate bars from falling thro' between these tubes, I
place a sheet iron floor or plate on the top of them. Another method of forming
a false "crown," and somewhat simpler, is to put a tiled "crown" to the lower
series, and resting on flat angle iron spans or struts, until a sufficient area is
covered. The bottom series of bars can be made movable if necessary.
A pair of doors is provided for the upper grate bars, and also a balanced swing
door for the lower series, into which, smaller doors can be put if required.
In order that these improvements may be understood, reference is had to the
accompanying illustrative drawings in which Fig. 1 shews a front elevation, Fig. 2
a side elevation. In Fig. 1-1 is the boiler shell, 2 the inner shell or furnace flue,
3 the upper series of bars, 4 the doors accompanying same, 5 the outside horizontal
cross tube, into which the smaller tubes are fixed. 51 (Fig. 2) shews the opposite
cross tube, 6 the lower series of grate bars, and 7 the swing doors belonging to
same.
By this means, I obtain a large area of grate surface, the smaller "crown" tubes
absorbing the heat from the lower furnace, and circulating the water to the main
body of water inside the boiler.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is performed, I declare that what I claim is-
1. In a steam generator of the kind herein referred to, an upper and lower series
of grate bars, the " crown "of the lower series may be formed of inclined water
tubes, and may be fixed as shewn in Figs. 1 and 2, or a crown consisting of
firebrick tiles resting on angle iron struts or spans, may be used.
66
"
2. In a steam generator of the kind herein referred to, an upper and lower com-
plement of doors, which may be balanced horizontally, in order to open and shut
them with facility, also doors fixed on these balanced doors.
Dated this 27th day of February 1894.
GEORGE VICTOR PRIESTLEY.