An Improved Washer or Scrubber for Purifying Gas.
Year: 1898

page_text: Date of Application, 19th Aug., 1898
Complete Crocifiosting Loft 40th Mov 1000 Accented 5th July 1800
PROVISIONAL SPECIFICATION.
An Improved Washer or Scrubber for Purifying Gas.
We, ARTHUR EDWARD NIELD YEADON and SAMUEL NIELD YEADON, both
Engineers, of 4, Albion Place, Leeds, in the County of York, do hereby declaro
the nature of this invention to be as follows:-
Our invention consists in the use or application of a horizontal cylinder,
revolving on outside bearing rollers, fitted with a suitable stationary mouth-
piece at each end; and having attached within the said cylinder a central tube
and a continuous gas-tight spiral screw with perforated division plates fixed in
the same; the space in the said divisions being filled with wood balls, grids, or
other analogous appliances for finely dividing the water, and thus securing. by
means of the adoption of this spiral form, a largely increased cubic area for
containing the balls or grids and free passage of the gas, and consequently
securing that a larger proportionate quantity of gas can be passed through the
increased area of washing surface and become freed from the ammonia and other
gaseous impurities.
In the following description we shall use the term "wood balls' as also includ-
ing the use of wood grids or any other analogous materials which may be filled
into the divisions of the spiral screw, suitable for presenting a large area of wet
surface to the gas in passing through.
Inside the revolving cylinder and running nearly the whole length of it we
have a central tube closed at one or both ends. Between the outside circum-
ference of this tube and the internal surface of the cylinder we fix the continuous
spiral screw which also runs nearly the whole length of the cylinder. Both edges
of this spiral screw are fitted with angle iron or other suitable arrangement for
securely fixing it to the cylinder and tube and both edges throughout its entire
length are made gas-tight. The tube is thus carried by the cylinder to which it
is attached by the spiral screw and the whole revolve together.
The ends of the cylinder can be rounded off to a smaller diameter, and made
suitable for revolving in a fixed stationary mouthpiece at each end, such mouth-
piece being fitted with adjustable gland to keep the cylinder ends gas-tight, one
of these mouthpieces being for the inlet of the gas, and the opposite one for
the outlet of the same. The edges of the spiral screw being gas-tight the gas is
made to follow the spiral space formed by the screw in passing through the
cylinder.
In different parts of this spiral screw we fix any number of perforated division
plates through which the gas has to pass, these plates being fixed at suitable
distances, thus dividing the area contained in the spiral screw into a series of
chambers. Each of these chambers is filled in with wood balls, the dividing plates
preventing the balls from working through the cylinder as it revolves.
In any part of the (gas) outlet mouthpiece we insert a pipe for the inlet of the.
water into the cylinder. At the bottom of the opposité (gas) inlet mouthpiece

page_text: we fix a sealed outlet pipe for the escape of the ammoniacal liquor or foul water
after it has passed through the cylinder. We also fixed coiled pipes or other
suitable arrangement at this end, by means of which as the cylinder revolves, the
ammoniacal liquor or foul water is raised from the bottom of the cylinder and
delivered automatically through its smaller end and mouthpiece into the sealed
outlet pipe.
At the back of each perforated division plate and close to the internal surface
of the cylinder we fix a bucket for raising the water lying at the bottom of the
cylinder, and pouring it over the wood balls so as to keep their surfaces con-
stantly wet and dripping. If required, these buckets can form part of the divi-
sion plate itself. We can also fix other buckets perforated or solid, to the internal
surface of the cylinder between the division plates the number, size, shape, and
perforations of these buckets are adjusted so as to keep the balls thoroughly and
constantly wet, and also to carry the water continuously forward through the
spiral screw.
On the outside of the cylinder we have two or more bearing rings turned so
as. to revolve truly on suitable bearing rollers underneath. One or both of theso
rings can be made of a A shape and the bearing rollers to suit, so as to pre-
vent the cylinder from working endwise. We also fix any suitable geared wheel
on the outside of the cylinder for the purpose of communicating the necessary
revolving motion to it.
The pure water is admitted to the cylinder at the opposite end to that whereby
the gas enters. If advisable we can also arrange a connection to the middle of
the central tube by means of which ammoniacal or other liquor can be admitted.
there from the outside to assist in the washing of the gas.
It will thus be seen that in our invention no area of washing space is lost as is the
case in other rotating washers where nearly half of the drum is immersed in water.
and where space is also lost between the drums themselves; but that with the
exception of the area occupied by the small central tube the whole of the internal
cubic area of the cylinder is utilised for the purpose of containing the wood balls.
and free passage of the gas, thus requiring proportionately less length and
diameter for our washer than for ordinary rotating washers in which only about
one third of the space can be effectively utilised for the passage of the gas; whilst
on account of the gas having to pass regularly and continuously through the
space formed by the spiral screw it is more evenly diffused and brought into con-
tact with the wet surfaces of the balls. Also that by dispensing with any
internal shaft, drums, and other frictional working parts our washer is much
simpler, less liable to get out of order, can be more easily repaired when required,
and needs less motive driving power; whilst the effective washing of the gas is
thus secured by a washer of much less diameter and length and consequently
cost, than with ordinary ones.
Our invention is designed therefore to reduce first cost, space required, and
motive power, and we propose to carry it out substantially as above described.
Dated this Eighteenth day of August 1898.
We, ARTHUR EDWARD NIELD YEADON and SAMUEL NIELD YEADON, both
Engineers, of 4, Albion Place, Leeds, in the County of York, do hereby declare 5

page_text: 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:-
Our invention consists in the use or application of a horizontal cylinder, revolv-s
ing on outside bearing rollers, fitted with a suitable stationary mouthpiece at,
each end; and having attached within the said cylinder a central tube and a.
continuous gas-tight spiral screw with perforated division plates fixed in the
same; the space in the said divisions being filled with wood balls, grids, or other;
analogous appliances for finely dividing the water, and thus securing by means
of the adoption of this spiral form, a largely increased cubic area for containing,
the balls or grids and free passage of the gas, and consequently securing that.
a larger proportionate quantity of gas can be passed through the increased area
of washing surface and become freed from the ammonia and other gaseous
inipurities.
"
In the following description we shall use the term "wood balls
as also
including the use of wood grids or any other analogous materials which may be
filled into the divisions of the spiral screw, suitable for presenting a large area
of wet surface to the gas in passing through.
In the accompanying drawing illustrating our washer, Fig. 1 shows the longi-
tudinal section, Fig. 2 shows it in plan, Fig. 3 is a transverse section showing
the division plates, wood balls, and buckets, and Fig. 4 a section showing dis-
charging vanes for the ammoniacal liquor or foul water.
Inside the revolving cylinder A and running nearly its entire length we have.
a central tube B, closed at one or both ends. Between the outside circumference
of this tube and the internal surface of the cylinder we fix the continuous spiral
screw CC which also runs nearly the whole length of the cylinder. Both edges.
of this spiral screw are fitted with angle iron or other suitable arrangement for,
securely fixing it to the cylinder and tube and both edges throughout their
entire length are made gas-tight. The tube is thus carried by the cylinder to
which it is attached by the spiral screw and the whole revolve together.
The ends of the cylinder are rounded off to a smaller diameter as at D, D',
and made suitable for revolving in stationary mouthpieces E, E, at each end.
These mouthpieces are fitted with adjustable glands to keep the cylinder ends
gas-tight, one of the mouthpieces E being for the inlet and E for the outlet of
the gas. The edges of the spiral screw being gas-tight the gas is made to follow
the spiral space formed by the screw, in passing through the cylinder.
In different parts of this spiral screw, and at suitable distances, we fix any
number of perforated division plates F through which the gas has to pass.
These plates being fixed at suitable distances, divide the cubic area contained in
the spiral screw into a series of chambers each of which is filled in with wood
balls, the dividing plates preventing the balls working through the cylinder as
it revolves.
In any part of the mouthpiece E we insert a pipe P for the inlet of the water
into the cylinder. At the bottom of the inlet mouthpiece E we fix a sealed
outlet pipe Pending in the cistern P³ for the escape of the ammoniacal liquor
or foul water after it has passed through the cylinder. The cylinder end Dis
fitted with spiral or coil pipes d, by means of which as the cylinder revolves,
the ammoniacal liquor or foul water is raised from the bottom of the cylinder
and delivered automatically through the small end and the sealed pipe P¹.
At the back of each of the perforated division plates, and close to the, internal
surface of the cylinder we fix a bucket G for raising the water lying at the
bottom of the cylinder, and pouring it over the wood balls so as to keep their
surfaces constantly wet and dripping carrying the water forward with the. next
division of the screw. If required, these buckets can form part of the division
plate itself. Other auxiliary buckets, as at G2, perforated or solid, can be fixed
to the internal surface of the cylinder between the division plates, to pour the
water on the balls; the number, size shape, and perforation of these buckets
'

page_text: being adjusted to keep the balls thoroughly and constantly wet, and to carry the
water continuously forward through the spiral screw.
On the outside of the cylinder there are bearing rings A2 and A³, turned so as
to revolve truly on the bearing rollers R underneath. One of these rings, as
at A2 is made of A shape, with the bearing rollers shaped to suit so as to prevent
the cylinder working endwise.. We also fix on the circumference of the cylinder
a toothed wheel W, driven by any suitable gearing, for communicating the
revolving motion.
The pure water is admitted to the cylinder through the pipe P, and after going
through the cylinder, escapes by the sealed outlet pipe P2. The gas entering
at H meets the water, and, after passing through the cylinder, escapes at the
outlet-pipe H2. If found advisable, an inlet-pipe connection can be arranged to.
the centre or any other part of the central tube, as at B² and B3, from any outside
cistern, by means of which ammoniacal or other liquor can be admitted there into
the screw space to assist in the washing of the gas."
It will thus be seen that in our invention no area of washing space is lost as
is the case with those rotating washers where nearly one half of each drum is
always immersed in water, in addition to the loss of space outside and between
the drums themselves; but that with the exception of the area occupied by the
small central tube, the whole of the internal cubic area of the cylinder is utilised
for the purpose of containing the wood balls and free passage of the gas, thus
requiring proportionately much less length and diameter than with other rotating
washers; and that, in addition, by the gas flowing regularly and continuously
through the space formed by the spiral screw, it is more evenly diffused and
brought into contact with the wet surfaces of the balls. Also, that by dispensing
with the ordinary internal shaft, complicated drums, and other frictional surfaces,
our washer is much simpler, less liable to get out of order, more easily repaired,
and requires less motive power; whilst the effective washing of the gas is thus
secured by a washer of much less diameter and length thus securing greater
efficiency, with a considerable saving in first cost, motive power, and repairs.
Our invention is designed therefore to reduce first cost, space required, and
motive power.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. The use or application of a revolving horizontal cylinder with outside
bearing rollers and fitted with gas tight end boxes or mouthpieces, for washing
or scrubbing gas with water or other liquids.
2. The use of the above fitted with an internal central tube and a continuous
spiral screw attached to the same for working the purifying liquid continuously
and automatically through the cylinder.
3. The use of the above combined with suitable fixed perforated division plates
for retaining the wood balls, grids, or other materials in position for washing
or scrubbing the gas.
4. The use of the above combined with suitable internal buckets for automatic-
ally raising the liquid from the bottom of the cylinder and pouring it over the
wood balls or grids.
5. The use of the above combined with spiral vanes or channels at the dis-
charging end of the cylinder, for raising the foul liquid from the bottom of the
cylinder and delivering it into the central discharging outlet.
Dated this 17th day of May 1899.
ARTHUR EDWARD NIELD. YEADON.
SAMUEL NIELD YEADON.