Improvements applicable in connection with Steam Boiler and other Furnaces.
Year: 1895

page_text: Date of Application, 20th Feb., 1895
Complete Specification Left, 16th Nov., 1895-Accepted, 21st Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements applicable in connection with Steam Boiler and
other Furnaces.
I, JAMES HOWDEN, of 8, Scotland Street, in the County of Glasgow, North
Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say :-
My said invention comprises improved means of dealing with the used fire gases
of steam boiler and other furnaces in order to remove therefrom smoke or
carbonaceous particles and soluble constituents.
In connection with steam boilers of a common marine type the means I employ
is to be used in combination with forced draught; and in carrying out my invention
according to one modification in the case of a single boiler, I construct a casing at
any convenient side of the uptake or funnel, with lower and upper openings into
the funnel; a damper or valve being placed in the funnel between the two openings.
Immediately above the lower opening into the funnel and close thereto I place one or
more perforated pipes supplied with water under pressure these pipes being arranged
to throw one or more sheets of spray into the casing. In a preferable arrangement
one sheet of spray is thrown horizontally or nearly so directly across from the funnel
to the other side of the casing, another sheet of spray being directed more or less
downwards. The fire gases pass through the spray and become washed and
purified, the pressure they have due to the forced draught, enabling them to
sufficiently overcome any retarding effect of the spray.
The casing extends below the lower opening in the funnel and the water and
what the water absorbs from the fire gases collect in the lower part, passing off
through a perforated diaphragm below which there are trays for collecting the
solid matters. These trays which as well as the perforated diaphragm are made
removable for being emptied, are made with raised edge rims over which the water
overflows into a discharge pipe.
In an arrangement in which two or more boilers are in connection with a single
funnel the sheets of spray may be directed downwards and with more or less
inclination at the openings into the bottom of the funnel, the bottom of the flues
being sufficiently inclined downwards to cause the water to drain into the separating
trays.
In the case of land boilers, or of furnaces used as destructors or for other
purposes it will generally be convenient to apply the sheets of spray in a horizontal
Hue leading to the chimney the spray pipe or pipes being at the top of the horizontal
flue and the sprays being directed downwards so that the fire gases may pass
horizontally across them.
Dated this Nineteenth day of February 1895.
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements applicable in connection with Steam Boiler and
other Furnaces.
I, JAMES HOWDEN, of 8, Scotland Street, in the County of Glasgow, North-
Britain, 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, that is to say :-
My said invention comprises improved means of dealing with the used fire gases
of steam boiler and other furnaces in order to remove therefrom smoke or
carbonaceous particles and soluble constituents.
Apparatus as made according to my invention is shown on an accompanying
sheet of explanatory drawings, Figures, 1, 2, 3 and 4, thereof being vertical sections
of varied modifications. In these drawings the same reference letters are used to
mark the same or like parts wherever they are repeated.
In connection with steam boilers of a common marine type the means I employ
is to be used in combination with forced draught; and in carrying out my invention
according to the modifications shown in Figures, 1, and 2, of the drawings, in the
case of a single boiler, I construct a casing, A, at any convenient side of the
uptake or funnel, B, with a lower opening, C, and an upper opening, D, into
the funnel, a damper or valve, E, being placed in the funnel between the two
openings. Immediately above the lower opening, C, into the funnel, B, and close
thereto (as shown in Figure, 1) or at the top of the upper opening, D, (as shown
in Figure, 2) I place one or it might be more perforated pipes, G, supplied with
water under pressure, these pipes being arranged to throw one or more sheets or
closely disposed rows of jets of water into the casing, A. In the modification shown
in Figure, 1, one sheet of water, H, is thrown horizontally or nearly so directly
across from the funnel, B, to the other side of the casing, A, another sheet of
water, J, being directed more or less downwards. Or the perforated pipe, G, may
be placed at the top of the upper opening, D, so as to direct the water down past
both openings, D, C. The fire gases pass through the water, H, J, and become
washed and purified, the pressure they have due to the forced draught, enabling
them to sufficiently overcome any retarding effect of the water.
The casing, A, extends below the lower opening, C, in the funnel, B, and the
water and what the water absorbs from the fire. gases collect in the lower part
passing off through a perforated diaphragm, K, below which there is a tray, L,
for collecting the solid matters. This tray, L, which as well as the perforated
diaphragm, K, is made removable for being emptied, is made with a raised edge
rim, M, over which the water flows into a discharge pipe, N.
In an arrangement in which two or more boilers are in connection with a single
funnel, B, the sheets of water, H, J, may be directed downwards and with more or
less inclination at the openings into the bottom of the funnel, the bottoms, P, of the
flues being sufficiently inclined downwards to cause the water to drain into the
separating trays, L, of which in this case there are two.
In the case of land boilers, or of furnaces used as destructors or for other
purposes it will generally be convenient to apply the sheets of water, H, J, in a
horizontal flue, Q, Figure, 4, leading to the chimney the spray pipe or pipes, G,
being at the top of the horizontal flue and the water being directed downwards so
that the fire gases may pass horizontally across them.
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
Annlving in connection with steam boiler or other furnaces annaratus for

page_text: causing the fire gases to pass through sheets or closely disposed rows of jets of
water the said apparatus being substantially such as is herein before described with
reference to Figures, 1, 2, and 3, of the accompanying drawings.
2. The modification of the apparatus hereinbefore described with reference to.
5 Figure, 4, of the accompanying drawings.
Dated this Fifteenth day of November 1895
EDMUND HUNT,
Applicant's Agent..