Gas Washer.
Year: 1894

page_text: Date of Application, 13th Sept., 18-4
Complete Specification Left, 6th June, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Gas Washer.
GEORGE PETTIGREW 58 St. Paul's Road Middlesbrough, Gas Engineer do
hereby declare the nature of this invention to be. as follows:-
The washer is made of cast iron or other suitable material, columnar or
vertical, & is made up of a series of shallow trays helical in form. The liquid to
wash the gas enters into the center circumvolution of the first tray at the top
of the "washer," & (there being any number of circumvolutions in each tray)
flows round each successive circumvolution from the center to the circumference,
down an overflow at the circumference, to the circumference of the second tray, &
round each successive circumvolution from the circumference to the center of 'the
second tray, down an overflow at the center, to the center of the third tray, & so
on through any number of trays. The gas to be washed enters the washer under
the bottom tray, passes up through spaces provided between the circumvolutions
into a serrated hood, which covers these spaces. The gas depresses the liquid
under the hoods passes through the serrations, & up through the liquid in the
tray, & through the spaces between the circumvolutions into the spaces under the
hoods in the next tray, & so on through any number of trays, then passes off
through a pipe at the top of the washer.
Dated this 12th day of September 1894.
GEORGE PETTIGREW 58 St. Paul's Road Middlesbrough Gas Engineer do
hereby declare 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:-
The washer is made of cast or wrought iron, or other suitable material, cylindrical
in form, & is made up of a series of shallow trays, the area of the bottoms of
which, are divided off, in the form of a helix, as shown in section Fig. 1. & in
plan Fig. 2. The number & diameter of the trays in the washer, being fixed, by
the quality & quantity of the gas required to be washed in a given time, (say per
hour). The water, or other liquid, by which the gas is to be washed, is let into the
washer at the top by the pipe A., to the centre of the helix, formed in the
top P. tray flowing round each circumvolution of the helix, from the centre to
the overflow pipe b. at the circumference, down this overflow, (the lower end of
which is sealed by the liquid), to the circumference of the next tray. The liquid
now flows round each circumvolution of the helix, from the circumference to the
centre overflow pipe G., down this overflow pipe to the centre of the helix in the
next tray, where the lower end of the overflow is sealed in the liquid, similar to b.,
and so on through any number of trays, the liquid passing off from the washer by
the overflow pipe d. The gas required to be washed is let into the washer at the
ונם....D

page_text: bottom, by the pipe E. the open end of which, is covered by a hood F., much
larger than itself. This hood is serrated round the circumference as shown, to a
depth less than the height of the overflow d. from the bottom of the washer, thus,
ensuring the serrations being always covered with liquid. The pressure of the
gas depresses the liquid under the hood F., passing out through the serrations, up
through the liquid; & through the openings c. in the helix, into the helical hood H.
covering the helix. The hood H. being serrated similar to F., to a depth less
than the height of the overflow b. The serrations are always covered with
liquid.
The gas depresses the liquid under the hood, passing out through the serrations,
up through the liquid, & through the openings c. into the hood H. of the next tray,
where the process of washing is repeated, and so on, through any number of trays,
the gas passing off from the washer by the pipe I. The depth of the helix in each
tray, being always more than the height of the overflow, ensures the liquid flowing
'round each circumvolution of the helix to the overflow. J. J. hand holes for
cleaning purposes.
Having now particularly described & ascertained the nature of my said inven-
tion, & in what manner the same is to be performed, I declare that what I
claim is.
1. The helical trays & hoods, forming the gas washer, herein substantially
described & shown on the accompanying drawing..
Dated this 5th day of June 1895.
GEORGE PETTIGREW.