Improvements in Apparatus for Washing and Scrubbing Gas.
Year: 1897

page_text: Date of Application, 28th Oct., 1897
Complete Snorifination Inft 25th
Lucky 1900
Ancontred
24th Cont 4000
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Washing and Scrubbing Gas.
We, KIRKHAM, HULETT & CHANDLER, LIMITED, Gas Apparatus Manufacturers,
and SIDNEY HERSEY, Engineer, all of 3 and 4, Palace Chambers, Bridge Street,
in the City of Westminster, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in what are known as washer-scrubbers
for washing and purifying gas.
In such apparatus as hitherto constructed, it has been found that as the gas
passes through the apparatus and the extraction of the ammonia takes place, the
temperature of the gas increases as it passes from bay to bay up to about the
middle of the machine and as a result the extraction of the final trace of ammonia
becomes more difficult thereby rendering necessary a larger number of bays than
would be required if the temperature of the gas were kept lower.
The object of our invention is to obviate the said objection and also to diminish
or prevent the deposit of napthaline from the gas at the outlet end of the
apparatus.
In carrying out our invention we employ a washer-scrubber of the ordinary
construction, but so arrange one or more of the bays that the washing liquor is
bye-passed, and the said bay or bays is or are provided with a number of tubes
through which the water for washing the gas is passed before entering the inlet
to the apparatus whereby the said water becomes more or less heated by the
partially washed gas passing over the said tubes, so that the gas passing out of
the apparatus meets this partially heated water, instead of cold water as hitherto,
whereby the deposit of napthaline is diminished or entirely prevented, and as the
temperature of the gas is diminished by passing over the said tubes, the extraction
of the final traces of ammonia is facilitated.
200
1007
Improvements in Apparatus for Washing and Scrubbing Gas.
We, KIRKHAM, HULETT & CHANDLER, LIMITED, Gas Apparatus Manufacturers.
and SIDNEY HERSEY, Engineer, all of 3 and 4, Palace Chambers, Bridge Street,
in the City of Westminster, do hereby declare the nature of this invention
Price Rd

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This invention relates to improvements in what are known as
for washing and purifying gas.
"washer-scrubbers"
In such apparatus as hitherto constructed, it has been found that as "the gas
passes through the apparatus and the extraction of the ammonia takes place, the
temperature of the gas increases as it passes from bay to bay up to about the
middle of the machine and as a result the extraction of the final trace of ammonia
becomes more difficult thereby rendering necessary a larger number of bays than
would be required if the temperature of the gas were kept lower.
The object of our invention is to obviate the said objection and also to diminish
or prevent the deposit of naphthaline from the gas at the outlet end of the
apparatus.
H
In carrying out our invention we employ a washer-scrubber of the ordinary
construction, but so arrange one or more of the bays that the washing liquor is
bye-passed, and the said bay or bays is or are provided with a number of tubes
through which the water for washing the gas is passed before entering the inlet
to the apparatus.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawing, in which:-
Figure 1 is a sectional side elevation of a washer-scrubber having our improve-
ments applied to it; and,
Figure 2 is an end view shewing the interior of one of our gas cooling or
condensing chambers.
a, a¹, a² are the bays containing the rotary scrubbing surfaces in the usual
manner and b is a bay wherein the rotary scrubbing surfaces are dispensed with
and around which the liquor flowing from one washing bay to another washing
bay flows through a bye-pass pipe c. The said chamber b which is practically dry
contains a series of, transverse tubes d, which tubes communicate at the ends
with boxes e, e divided by partitions f, f in such a manner that the water which
ultimately reaches the washing bays enters the tubes d, d through the pipe g. and
flows through them in the direction of the arrows in Figure 2, the water as it
leaves the uppermost tube passing through the pipe to the last of the series of
bays through which the gas passes as it leaves the apparatus.
The condensing bay b communicates with the washing bays through the pipes
or channels i, i so arranged that the gas which enters at the lower end of the
said condensing bay escapes at the upper end thereof.
With the arrangement hereinbefore described the gas after having passed
through one or more of the washing bays enters the condensing bay b where owing
to its contact with the tubes d, which are kept cool through the water flowing
through them, its temperature is considerably reduced whereby the extraction of
the final traces of ammonia by further washing is facilitated. The cooled gas
escaping from the top of the condensing bay again passes through one or more of
the washing bays.
In an apparatus provided with two or more of our condensing bays the gas
will be alternately washed and cooled.
The water which flows through the tubes d, d is obviously more or less heated
and this heated water flows into the bay in which the last washing of the gas
takes place before it leaves the apparatus.
Owing to the contact of the gas with this partially heated water instead of with
cooled water as hitherto the deposit of naphthaline is diminished or entirely
prevented.
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 for washing and scrubbing was wherein there is
9 series of

page_text: bays through which the gas successively passes, the provision of means for cooling
the gas as it leaves one washing bay and before it enters the next washing bay,
substantially as, and for the purpose, described.
2. In an apparatus for washing and scrubbing gas the arrangement of con-
densing bays through which the gas passes after it leaves one washing bay and
before it enters another washing bay, substantially as described and illustrated.
3. In an apparatus for washing, and scrubbing gas wherein a condensing bay,
having water cooled surfaces within it, is arranged between two washing bays,
passing the water which becomes more or less heated in the condensing bay into
a bay or bays at that end of the apparatus from which the gas issues, substantially
as, and for the purpose, described.
4. In apparatus for washing and scrubbing gas, wherein the gas is cooled by
contact with condensing surfaces kept cool by water, passing the water as it leaves
the condensing surfaces into the last bay or bays through which the gas passes,
substantially as, and for the purpose, described.
5. The manufacture and use of the improved apparatus for washing and
scrubbing gas, hereinbefore described and illustrated in the accompanying
drawing.
3 1
1 T..1.. 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.