IMPROVEMENTS IN APPARATUS FOR PURIFYING GASES AND CONDENSING FUMES OR VAPORS."
Year: 1882

page_text: LETTERS PATENT to William Sychar Reed Jackson, of Llansamlet, in the
County of Glamorgan, for an Invention of "IMPROVEMENTS IN APPARATUS
FOR PURIFYING GASES AND CONDENSING FUMES OR VAPORS."
PROVISIONAL SPECIFICATION left by the said William Sychar Reed
Jackson at the Office of the Commissioners of Patents on the 6th February
1882.
WILLIAM SYCHAR REED JACKSON of Llansamlet in the County of Glamorgan.
"IMPROVEMENTS IN APPARATUS FOR PURIFYING CASES AND CONDENSING FUMES
OR VAPORS."
My Invention consists in an improved condensing apparatus suitable for the
purification of gases and for the separation of particles of metallic or other
substances or compounds contained in vapours, gases or fumes proceeding from
furnaces, retorts, melting-pots, cupolas or other fire-places.
It is specially adapted for arresting the particles of lead and zinc compounds
contained in the fume proceeding from furnaces in which substances containing
these metals are being smelted.
In my condensing apparatus the gases or vapours, instead of being driven or
drawn through interstices or perforations, or through a liquid perpendicularly, are
caused to pass under a level or slightly inclined shelf, either with or without
grooves, corrugations or the like, which shelf is so placed in contact with a surface
of water or other liquid, that the gases pass in thin films or waves between the
shelf and the water or other liquid. The gases proceeding from the furnace or
other source may be driven or drawn under the shelf by means of a fan or blower
placed between the condenser and the furnace, as is usually done with other wet
fumo condensers; but I prefer drawing the gas under the shelf by suction, by
means of an exhausting fan or other suitable suction apparatus, placed in communi-
cation with an air-tight chamber which receives the gases after issuing from under
the shelf.
The friction which thus takes place between the particles contained in the fume
or gases and the wet surface of the shelf, and the constant washing of the shelf
by the liquid, cause the separation of the particles of metallic compounds. If
insoluble, these particles (or slime) subside to the bottom of the tank; or the muddy
liquor may be conveyed continuously into an adjacent reservoir for settling, and
fresh water supplied to the condenser.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Sychar Reed Jackson in the Great Seal Patent Office
on the 4th August 1882.
.
WILLIAM SYCHAR REED JACKSON of Llansamlet in the County of Glamorgan.
"IMPROVEMENTS IN APPARATUS FOR PURIFYING GASES AND CONDENSING FUMES 5
OR VAPORS."
My Invention consists in an improved condensing apparatus suitable for the
separation of particles of metallic or other substances or compounds contained in
various gases or fumes proceeding from furnaces retorts melting pots cupolas or
other fire places and is specially adapted for arresting the particles of lead and 1
zinc compounds contained in the fume proceeding from furnaces in which substances
containing those metals are being smelted,
In my condensing apparatus the gases or vapours instead of being driven or
drawn through interstices or perforations or through a column of liquid (as is done
in other wet fume condensers) are caused to pass under a level or slightly inclined 1
shelf either with or without grooves corrugations or the like the lower surface of
which shelf is so placed in contact with water or other liquor that the guses pass,
in thin films between the water or other liquor and the shelf.
The friction which thus takes place between the particles contained in the fume
and the wet surface of the shelf and the constant washing of the shelf by the s
-liquid cause the separation of the particles of metallic compounds. If insoluble
these particles or slime subside to the bottom-of-the-tank-;-or_the_muddy liquor
may be withdrawn continuously from one side of the condenser into an adjacent
reservoir for settling and fresh water or other liquor be supplied continuously at
the other side.
The accompanying Drawing represents such a condenser well suited for collecting
the metallic fumes referred to. It consists of a substantial wooden watertight
tank, about eight feet square, and three feet six inches deep; a a a is the shelf,
fixed horizontally and level, about two feet six inches from the top of the tank.
The shelf may be made of wood. Two stout partitions b, b and c c are placed
equi-distant (about two feet) from the sides of the tank and reach from the top
to the sides of the shelf to which they are securely fastened. The shelf may be
about four feet breadth (which is the distance through which the gases pass) and
eight feet in length, being fastened securely to the sides of the tank. The breadth
of the shelf may however be considerably less than I have stated above; with a
moderate supply of the gases, a shelf of two feet breadth will suffice for effective
condensation.
The portions of the tank d and e are covered so as to make two air tight com-
partments; fis the inlet for the gases and g the outlet. Water or other liquid is
admitted through the pipe h to about 2 inches above the lower surface of the
shelf; is a swivel overflow pipe by which the height of the water may be
adjusted and the contents withdrawn.
The gases proceeding from the furnaces may be driven under the shelf by means
of a fan or blower placed between the condenser and the furnaces as is usually done
with other wet fume condensers; but I prefer drawing the gas by suction under the
shelf by means of an exhausting fan or other well known suction apparatus placed
in communication with the air tight exit chamber.
The cooling of the furnace gases before entering the condenser is necessary to
some extent when these gases are very hot, which may be done either by passage
through iron pipes exposed to the air or over a surface of water; but there is no

page_text: necessity to cool below 350° Fahrenheit; in fact a moderate heat is desirable, as
the formation of steam and its subsequent condensation assists the separation of
the metallic particles. The compartment which receives the gases should be
protected by a lining of iron plates.
Having thus particularly described my said Invention I desire to state that I
do not confine myself to the precise details here described but what I claim as
novel is-
The arrangement of apparatus for effecting the separation from furnace gases
of particles of metals or metallic compounds or other substances by causing such
gases to pass under a level or slightly inclined shelf exposed to water or other
liquid substantially as herein described.
In witness whereof I the said William Sychar Reed Jackson have hereunto
set my hand and seal this Second day of August in the year of our Lord
One thousand eight hundred and eighty two.
JUN
2
45
TAGANT