IMPROVEMENTS IN APPARATUS FOR PURIFYING COAL GAS
Year: 1884

page_text: I WILLIAM THOMAS WALKER of Bishops Wood Road Highgate in the County
of Middlesex Engineer do hereby declare the nature of said Invention for
IMPROVEMENTS IN APPARATUS FOR PURIFYING COAL GAS" to be as follows:-
:-
This Invention relates to improvements in apparatus for purifying coal gas and
has for its object to render scrubbers more effective in cleansing the gases from
impurities than are scrubbers as at present arranged.
According to the said Invention the lower portion of the scrubber is filled with
thin planks or boards of oak or other hard wood preferably of a thickness of
about one eighth of an inch the said oak or other hard wood being of a strength
greater than that of deal or pine which would require to be of much greater
thickness to give the requisite strength and stability-The said thin planks or boards
of oak or other hard wood are set on edge preferably about three eighths of an
inch apart first one layer in one direction then another layer in the other direction
and so on until the requisite portion of the interior of the scrubber has been filled-
This arrangement of thin planks of oak or other hard wood gives a greatly
increased surface for the contact of the gases-The upper part of the scrubber is
then filled in with coke-The topmost portion of the body or main part of the
scrubber is of enlarged diameter and an annular seal cup is formed inside the
enlarged part to act as a liquid seal in which the inverted edge of a perforated
dash plate rotates above the coke-This rotating Dash plate is perforated and
being of greater diameter than that of the interior main body of the scrubber, the
water is distributed thoroughly over the entire area of the scrubber and it's
contents-The portion of the water that finds its way beyond the edges of the
Dash plate is received into the Seal Cup and thence overflows down the sides of
the scrubber Above the Dash Plate are the water distributing arms which will be
rotated in the opposite direction to the direction of the Dash Plate-In order to
utilize to the utmost the water passing through and from the dash plate for the
purification of the gases the outlet for the Gases from the scrubber is made above
the said dash p'ate so that the gases are compelled to pass through the perforations
of the said dash plate and come into contact with the water as it passes thereto
therethrough and therefrom.
We prefer to employ a washer in the lowermost part of the scrubber for
extracting the tar which may be in the gas when it first enters the apparatus.
Diabad shi 001 Jan Tom1001
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said William Thomas Walker.

page_text: I, WILLIAM THOMAS WALKER of Bishopswood Road, Highgate in the County
of Middlesex, Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN APPARATUS FOR PURIFYING COAL GAS" 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 apparatus for purifying Coal Gas and
has for its object to render scrubbers more effective in cleansing the Gases from
impurities than are scrubbers as at present arranged.
According to the said Invention the lower portion of the scrubber is filled with
thin planks or boards of Oak or other hard wood preferably of a thickness of about
one eighth of an inch the said oak or other hard wood being of a strength greater
than that of deal or pine which would require to be of much greater thickness
to give the requisite strength and stability. The said thin planks or boards of
oak or other hard wood are set on edge preferably about three eighths of an inch
apart first one layer in one direction then another layer in the other direction and
so on until the requisite portion of the interior of the scrubber has been filled-
This arrangement of thin planks of oak or other hard wood gives a greatly
increased surface for the contact of the gases-The upper part of the scrubber is
then filled in with coke-The topmost portion of the body or main part of the
scrubber is of enlarged diameter and an annular seal cup is formed inside the
enlarged part to act as a liquid seal in which the inverted edge of a perforated
dash plate rotates above the coke-This rotating dash plate is perforated and being
of greater diameter than that of the interior main body of the scrubber the water
is distributed thoroughly over the entire area of the scrubber and its contents―
.The portion of the water that finds its way beyond the edges of the dash plate is
received into the annular seal cup and thence overflows down the sides of the
scrubbers-Above the dash plate are the water distributing arms which will be
rotated in the opposite direction to the direction of the dash plate-In order to
utilize to the utmost the water passing through and from the dash plate for the
purification of the gases the outlet for the gases from the scrubber is made above
the said dash plate so that the gases are compelled to pass through the perforations
of the said dash plate and come into contact with the water as it passes thereto
therethrough and therefrom.
We prefer to employ a washer in the lowermost part of the scrubber for
extracting the tar which may be in the gas when it first enters the apparatus.
And in order that the said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the annexed sheet of drawings the same letters of reference indicating corresponding
parts in both the figures.
Figure 1 of the accompanying drawings represents a scrubber constructed or
arranged according to my Invention.
Figure 2 shews the upper portion of the scrubber drawn to a larger scale.
The portion of the scrubber at A is filled with thin planks or boards of oak or
other hard wood preferably of a thickness of about one eighth of an inch the said
oak or other hard wood being of a strength greater than that of deal or pine which
would require to be of much greater thickness to give the requisite strength and
stability The said planks or boards of oak or other hard wood are set on edge
preferably about three eighths of an inch apart, first one layer (the layers a) in one
direction, then another layer (the layers a²) in the other direction, and so on until
the requisite portion of the interior of the scrubber has been filled-This arrange-
anent of thin planks of oak or other hard wood gives a greatly increased surface
for the contact of the gases-The part of the scrubber at B is then filled in with

page_text: coke or equivalent material-The topmost portion C of the body or main part of
the scrubber is of enlarged diameter and an annular seal cup c is formed inside the
enlarged part to act as a liquid seal in which the inverted edge d of a perforated or
reticulated dash plate D rotates above the coke This dash plate is capable of being
rotated and being of greater diameter than that of the interior main body of the
scrubber (at B A) the water is distributed thoroughly over the entire area of the
scrubber and its contents-The portion of the water that finds its way beyond
the edges of the dash plate D is received into the seal cup c and thence overflows
down the sides of the scrubber-Above the dash plate is or are the water
distributing arm or arms (as at E) which will be rotated in the opposite direction
to the direction of rotation of the dash plate D.
In order to utilize to the utmost the water passing through and from the dash
plate for the purification of the gases the outlet pipe F for the gases from the
scrubber is made at f above the said dash plate D so that the Gases before they
can reach the said outlet are compelled to pass through the perforations of the said
dash plate and come into contact with the water as it passes therethrough and
therefrom. is a hood or cover for protecting the gas outlet from the water from
the distributing arms.
I prefer to employ a washer as at G in the lowermost part of the scrubber for
extracting the tar which may be in the gas when it first enters the apparatus.
It will be evident that the planks or boards may be in the part B and the coke
in the part A of the scrubber if desired, and it will also be evident that I do not
necessarily confine myself to the materials named for the thin planks or boards
as other materials having the requisite strength can be used such for example as
thin metal plates.
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 scrubber for purifying coal gas, provided at one portion with thin boards,
planks or plates, arranged as hereinbefore described, and at another portion with
coke or equivalent material, whether or not a washer be used, in the lowermost
portion of the scrubber substantially as herein before described.
2nd In scrubbers for purifying coal gas an upper part of a diameter larger than
the interior of the main body of the scrubber, and formed with a seal cup in which
rotates the edge of a perforated a reticulated dash plate of larger diameter than
that of the interior of the main body of the scrubber, substantially as and for the
purpose hereinbefore described and illustrated in the accompanying drawings.
3rd In scrubbers for purifying coal gas, an upper part of a diameter larger than
the interior of the main body of the scrubber, and formed with a seal cup in which
rotates the edge of a perforated or reticulated dash plate of larger diameter than
that of the interior of the main body of the scrubber, the outlet for the gas from
the scrubber being made above the dash plate, all substantially as and for the
purposes hereinbefore described and illustrated in the accompanying drawings.
4th In scrubbers for purifying coal gas arranging the outlet for the gas from the
scrubber, above the perforated dash plate or other water spreader, so that the gas
has to pass the said spreader or plate before it reaches the said outlet substantially
as herein before described.
Dated th
3
1
1004