Dust Intercepter for Water Gas Generators.
Year: 1898

page_text: Date of Application, 13th Apr., 1898
Complete Specification Left. 13th Jan., 1899-Accepted, 18th Feb., 1899
PROVISIONAL SPECIFICATION.
Dust Intercepter for Water Gas Generators.
I, SAMUEL CUTLER, Engineer, of Providence Iron Works, Millwall, in the
County of London, do hereby declare the nature of this invention to be as
follows:-
In the manufacture of carburetted water gas the air blast used during the
"blows" expels from the generating vessels a varying quantity of dust which
passing into the atmosphere at the superheater chimney may in populous neigh-
bourhoods be objectionable. By means of my invention this dust is intercepted,
precipitated in water and drawn off in the form of sludge at convenient intervals.
In carrying out my invention I surround the head of the superheater chimney
with a cowl of special form and place beneath the same a suitable catch tray
containing water. Within the annular chamber between the chimney and the
cowl I place a series of water or steam! sprays which may be
either continuously or intermittently active and may in the latter case
be controlled automatically by the slack valve gear so as to be active only during
the blows."
6.
By this means I produce a cloud of vapour which damps the dust and facilitates
its separation from the air and gaseous products of combustion in which it is
suspended causing it to be readily precipitated into the catch tray.
Alternately I use a cowl made by prolonging the chimney and forming it into
one or more ducts leading to the catch tray and I then place the water or steam
sprays within these ducts.
In some cases I may dispense with the sprayers and precipitate the dry dust
directly into the water contained in the catch tray but where possible I prefer
to use the damping process herein before described."
To permit the sludge to be withdrawn without draining out the water contained in
the catch tray I provide a series of two or more sluice valves or equivalent devices
with chambers or leeks between them and by closing the upper valve and open-
ing the lower one the sludge contained in the chamber or lock is readily dis-
charged, the valves being then again reversed until the lock is again filie with
sludge, when the operation is repeated.
Dust Intercepter for Water Gas Generators.
I, SAMUEL CUTLER, Engineer, of Providence Iron Works, Millwall, in the
County of London, do hereby declare the nature of this invention and in what
[Price 8d.l

page_text: manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:—
In the manufacture of carburetted water gas the air blast used during the
"blows" expels from the generating vessels a varying quantity of dust which
passing into the atmosphere at the superheater chimney may in populous neigh-
bourhoods be objectionable. By my invention this dust is intercepted
precipitated in water and drawn off in the form of sludge at convenient intervals.
In the accompanying sheet of illustrative drawings Fig. 1 is a vertical section
of a dust intercepter constructed according to this invention. Fig. 2 is a hori-
zontal section on the line 'A B Fig. 1, Fig. 3 is an elevation, and Fig. 4 is a plan
of the same.
The upper part or head a of the superheater chimney is surrounded by a
cowl b connected, through struts c, to and supported by an annular catch tray d
containing water and having a sloping bottom e, the said catch tray being itself
suspended from the chimney head by hooked rods f as shown.
Within the annular chamber h between the chimney and the cowl I place a
series of water or steam sprays i which may be either continuously or inter-
mittently active and may in the latter case be controlled automatically by the
stack valve" gear so as to be only active during "blows."
By this means I produce within the annular chamber h a cloud of vapour which
damps the dust and facilitates its separation from the air and gaseous products
of combustion, causing it to be readily precipitated into the catch tray d
The sludge automatically gravitates into a collecting box at the lowest part
of the catch tray d and is withdrawn at intervals through a tubular connection m
controlled by a sluice valve n as shown.
Alternatively I use a cowl made by prolonging the chimney and forming it into
one or more ducts leading to the catch tray and I then place the water and steam.
sprays within these ducts.
In some cases I may dispense with the sprayers and precipitate the dry dust
directly into the water contained in the catch tray but where possible I prefer
to use the damping process herein before described.
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 dust intercepter for water gas apparatus consisting of a cowl and a catch
tray to contain water, substantially as described.
2. A dust intercepter for water gas apparatus consisting of a cowl surround-
ing the chimney head, a catch tray to contain water and a series of steam sprays,
substantially as described.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.