Year: 1888

page_text: Date of Application, 25th May, 1888
RE
Complete Specification Left, 28th Jan., 1889
Complete Specification Accepted, 2nd Mar., 1889
We, SAMUEL CHANDLER, Senior, SAMUEL CHANDLER Junior and JOSIAH CHANDLER
all of Central Works, Kennington Oval, in the county of Surrey, Gas Engineers,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in washing and scrubbing gas and in the
scrubbing devices used therefor.
In carrying out a part of our invention we cause liquor from the last or fonlest-
bay of a washer-scrubber to be carried back to a bay or to bays through which the
liquor has already passed whereby we thoroughly extract the ammonia and increase
the strength of the ammoniacal liquor and more effectually purify the gas from other
impurities.
For this purpose we provide the revolving scrubbing devices or the shaft of the
washer-scrubber with suitable arrangements for raising the water or liquor in the
foulest bay, and discharging it into a gutter or pipe by which it is conveyed to
the adjoining bay or bays, and as the level of the liquor is higher in this gutter or
pipe than in the adjoining bay, a circulation of the liquor is thus kept up and it is
worked over and over again whereby the strength of the liquor is increased, and a
larger quantity of the impurities is removed from the gas than by the system
hitherto in use.
Our improvements in scrubbing devices used for providing wetted surfaces in
washer-scrubbers, consist in providing scrubbing devices which shall be simple,-
effective light and economical, and adapted to rotate in the usual manner in the
water or liquor contained in the bays or receptacles of a washer-scrubber.
In carrying out the second part of our invention we provide side plates in the
form of segments of a circle which plates have slots formed in them. A pair of
these plates are connected together at a distance apart so as to form a kind of cage,
and into the slots we place the scrubbing material. We have found that wood in the
form of ordinary plasterers laths gives good results, (but we do not confine ourselves

page_text: to wood) and the laths being cut somewhat longer than. the width of the cages the
ends project through the slots so that a good. hearing is obtained. We find it
advantageous to arrange the slots in the plates so that one layer of the laths. comes
over the spaces between the laths of the layer below.
It will be understood that these layers of scrubbing material may be inade a fixture
in hundles but in that event they would not be so easily or conveniently removed or
replaced as in the manner first mentioned.
A number of these segments are connected together so as to form as it were a
wheel, and a number of such wheels are caused to rotate with the shaft of the scrubber
in the bays or tanks in the usual manner.
By our improved construction of scrubbing devices it will be obvious that the gas
as it travels through the scrubber is split and broken up in a very advantageous
manner, and a zig-zag course is given to it whereby the gas is brought into very
intimate contact with the wetted surfaces and is subjected to a very effectual combing,
which is very advantageous for the extraction of the tar.
Our improved devices require relatively but little motive power and the wear and
tear is considerably reduced.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicants.

page_text: Our invention, in so far as it relates to scrubbing devices used for providing
wetted surfaces in washer-scrubbers, consists in providing scrubbing devices as herein-
after more particularly described which shall be simple, effective, light and economical,
and adapted to rotate in the bays or receptacles of a washer-scrubber.
To enable our invention to be fully understood we will describe how it can be
carried into practice by reference to the accompanying drawings, in which,
Figure 1 is a side elevation of a gas washer-scrubber constructed according to our
invention.
Figure 2 is a plan (partly in section) of the same, and
Figure 3 is a vertical section on the line A, B. of Figure 1.
Figure 4 is a detached end view, drawn to an enlarged scale, of one of the sections
of our improved scrubbing devices, and
Figure 5 is a section of the same on the line C. D of Figure 4.
Figure 6 is a transverse vertical section of part of a wheel formed by our
scrubbing devices, and,
Figure 7 is a side elevation of the same, partly in section, on the line E, F of
Figure 6.
Figures 8, 9, 10 and 11 are corresponding views to those shown in Figures 4,
5, 6 and 7 illustrating a modification of the arrangement of the scrubbing devices.
a is the body or casing of the apparatus which is divided into bays or chambers
containing water or other suitable liquid (the level of the liquid in the said chambers
being successively lower from one end to the other of the casing); b is a shaft
mounted in the casing for carrying revolving scrubbing devices adapted to he
maintained in a wet condition by passing through the water or other liquid in the
chambers, and c, c, c, c¹ are the gas inlets and outlets respectively. All the said parts
are of well known construction being substantially the same as described in the
Specification of patent No. 4928, dated 29th December 1877, and therefore need no
further description.
d is one of the scrubbing devices mounted on the shaft b and constructed as hercin-
after described; e, e are buckets secured to the side of the scrubbing device in the
chamber containing the liquid at the lowest level, fis a trongh upon the inner side of
the casing a adjacent to the said buckets and g is a pipe extending from the said trough
to all the other chambers so that as the liquid is raised by the buckets and discharged
into the trough it will flow into the several chambers. h, h are cocks by means of
which the liquid can be shut off from any chamber or chambers as desired.
The surfaces of the scrubbing devices d are advantageously composed of wood
bars i, i.in the form of plasterers laths, although bars or laths of any other suitable
material may be employed.-These bars are carried between side plates j, j ), of
preferably segmental shape, which plates j, j are slotted to receive them, as shewn
in Figures 4 and 5, the slots being advantageously arranged so that the laths of one
layer come opposite to the spaces between the laths of the next layer and vice
versa.
The segmental sections thus formed are secured to a wheel k between discs 1, l' as
shown in Figures 6 and 7, so that they will rotate with the central shaft b.
We sometimes modify the construction of the sections, as shown in Figures 8 and 9,
by dispensing with the side plates j,,,j. In such case transverse laths m, m, are
placed between the layers of laths i, to inaintain them at proper distances apart, the
ends of the sections being bound with hoop iron to hold the laths in their proper
relative positions. These sections are secured to a central wheel between side plates of
the kind herein before described by means of bars n, and bolts n', as shown in
Figures.10 and 11, but they may be secured by any other desirable means.
By our improved construction of scrubbing devices it will be obvious that the gas
as it travels through the scrubber is split and broken up in a more advantageous
manner and a more zigzag course is given to it than hitherto whereby it is brought
into very intimate contact with the wetted surfaces of the scrubbing devices and is
subjected to a very effectual combing, which greatly facilitates the extraction of th
tar and other impurities.

page_text: Our improved apparatus requires relatively but little power for driving it and the
wear and tear is inconsiderable.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
(1) In apparatus of the kind herein before described for washing and scrubbing
gas, the combination of one or more buckets or its or their equivalent or equivalents
with a trough into which the said bucket or buckets is or are adapted to discharge,
the said trough being suitably connected by a pipe or channel with one or more
of the bays or chambers of the apparatus, substantially as and for the purpose,
herein before-described.
(2) In apparatus for washing and scrubbing gas comprising a number of bays or
chambers as set forth, a series of scrubbing devices each of which is essentially
constructed of a number of sections built up of bars or laths carried between suitable
side plates and dises or discs alone whereby as the scrubbing devices rotate a large
area of wetted surface is provided and whereby a very zigzag course is given to the
gas in passing through the apparatus, the gas being thereby thoroughly broken or split
up and brought into very intimate contact with the said wetted surfaces substantially
as described.
(3) The manufacture and use of the hereinbefore described scrubbing devices,
illustrated in Figures 4 and 5, and 8 and 9 of the accompanying drawings.
(4) The improved apparatus for washing and scrubbing gas, hereinbefore described
and illustrated in Figures 1, 2 and 3 of the accompanying drawings.
Dated the 20th of Tann1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicants.