Hydraulic Mains Used in the Manufacture of Coal Gas.
Year: 1886

page_text: Hydraulic Mains Used in the Manufacture of Coal Gas.
I. JOHN DILLAMORE of Two Gates near Tamworth in the County of Warwick
Manager of Works do hereby declare the nature of this Invention to be as follows:―
My invention has for its object the rapid removal of the tar produced in the manu-
facture of coal gas from the hydraulic main in which it is first deposited the removal
of the tar being effected while it is still hot. This I effect by an apparatus constructed
essentially as follows:-
A short distance below the ordinary hydraulic main I fix a secondary hydraulic
main the said secondary main being parallel to the ordinary or principal hydraulic
main and of less diameter. The said secondary main is connected to the principal
hydraulic main by means of several short vertical pipes having valves or stopcocks.
A closed receiver preferably having the figure of a vertical cylinder the top of
which is below the level of the secondary main is connected with both the principal and
secondary hydraulic mains by pipes opening respectively into the ends of the said
mains and the top of the closed receiver. The pipe connecting the principal main
with the receiver opens into the main at such a height that sufficient ammoniacal
liquor is retained in the main to seal the several delivery pipes. The pipes connecting
the two mains with the receiver are provided with valves. In the working of the
apparatus the receiver is filled with ammoniacal liquor or with water supplied through
a third pipe having a stop cock the said third pipe opening into the top of the receiver.
As the tar and ammoniacal liquor are deposited in the principal hydraulic main the
tar from its greater density forms the lower stratum and passes by the vertical con-
necting pipes into the secondary main and from thence into the receiver. The
ammoniacal liquor or other liquid in the receiver is displaced by the tar and passes
into the principal hydraulic main from which when its level becomes higher than is:

page_text: required for sealing the delivery pipes in the main it passes into a seal pot and from
thence into a storage well. This outflow of the ammoniacal liquor takes place at the
end of the hydraulic main opposite that connected with the receiver.
The tar is allowed to accumulate in the receiver until it is nearly filled a pipe having
a stopcock opening into the receiver near its top giving the means of ascertaining
when the tar has reached that height. When the receiver is nearly full of tar the
communications between the two mains and the receiver are closed by means of their
valves and the valve of a pipe connecting the bottom of the receiver with the tar
storage well is opened and the tar in the receiver passes into the storage well.
The receiver is then refilled with ammoniacal liquor or water and the collection of
the tar again proceeds in the manner described.
W. T. WHITEMAN,
Agent for the Applicant.
A New or Improved Apparatus for Removing Tar from the
Hydraulic Mains Used in the Manufacture of Coal Gas.
I JOHN DILLAMORE of Two Gates near Tamworth in the County of Warwick,
Manager of Works do hereby declare the nature of my Invention and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement :-
My invention has for its object the rapid removal of the tar produced in the manu-
facture of coal gas from the hydraulic main in which it is first deposited, the removal
of the tar being effected while it is still hot. This I effect by an apparatus constructed
essentially as follows:-
A short distance below the ordinary hydraulic main I fix a secondary main the said
secondary main being parallel to the ordinary or principal hydraulic main and of less
diameter. The said secondary main is connected to the ordinary hydraulic main by
means of several short vertical pipes having valves or stopcocks.
A closed receiver preferably having the figure of a vertical cylinder, the top of
which is below the level of the secondary main, is connected with both the principal
and secondary mains described by pipes opening respectively into the ends of the said
mains and the top of the closed receiver. The pipe connecting the ordinary hydraulic
main with the receiver opens into the said main at such a height that sufficient
ammoniacal liquor is retained in the main to seal the several dip pipes in the said
main. The pipes connecting the two mains with the receiver are provided with valves.

page_text: In the working of the apparatus the receiver is filled with ammoniacal liquor or
with water supplied through a third pipe having a stop cock, the said third pipe
opening into the top of the receiver. As the tar and ammoniacal liquor are deposited
in the principal hydraulic main the tar from its greater density forms the lower
stratum' and passes by the vertical connecting pipes into the secondary or tar main and
from thence into the receiver. The ammoniacal liquor or other liquid in the receiver
is displaced by the tar and passes into the principal hydraulic main from which when
its level becomes higher than is required for sealing the dip pipes in the main it passes
into a seal pot and from thence into a storage well. This outflow of the ammoniacal
liquor takes place at the end of the hydraulic main opposite that connected with the
receiver. The tar is allowed to accumulate in the receiver until it is nearly filled a
pipe having a stopcock opening into the receiver near its top giving the means of
ascertaining when the tar has reached that height. When the receiver is nearly full
of tar the communications between the two mains and the receiver are closed by
means of their valves and the valve of a pipe connecting the bottom of the receiver
with the tar storage well is opened and the tar in the receiver passes into the storage
well.
The receiver is then refilled with ammoniacal liquor or water and the collection of
the tar again proceeds in the manner described.
The accompanying Drawing represents in front elevation, partly in section, my new
or improved apparatus for recovering tar from the hydraulic mains used in the manu-
facture of gas.
b
a is the hydraulic main into which the tar and ammoniacal liquor are delivered
by the dip pipes a³, a and b is the secondary or tar main situated below and parallel
with the hydraulic main a. The said tar main b is connected to the hydraulic main a
by the short vertical pipes c, c each pipe being provided with a valve or stopcock d;
e is the closed receiver in which the liquid tar from the tar main & passes, the top of the
said receiver e being situated below the level of the said main bas represented. The
receiver e before the tar is received in is filled with ammoniacal liquor by the pipe
at fand the level of the liquor in the said receiver is indicated by the vertical pipe or
gauge g which also acts as an air vent pipe. The hydraulic main a is also in com-
munication with the tar receiver e by the pipe h provided with the valve or stopcock i
the displaced ammoniacal liquor from the said receiver e passing by the said pipe
the hydraulic main a. The height of the said pipe with respect to the hydraulic
main a is such that the ammoniacal liquor forced into the said main acts as a seal to
the bottom of the dip pipes a², a opening into the said main. The level of the tar
in the receiver e is indicated by the passing of the tar through the overflow pipe k
which is provided with a stopcock.
to
In the bottom of the tar receiver e is a pipe provided with a stopcock m the said
pipe opening into the storage tar well.
Opening into the end of the hydraulic main a opposite that at which the tar
receiver e is situated is a vertical pipe n provided with a seal regulating valve p. The
said pipe n descends to the seal pot q into which pot the ammoniacal liquor passes
from the hydraulic main a. The seal pot y communicates by the tube or pipe ŕ with
the storage well.
I will now describe the working of the apparatus. The tar receiver e having been
filled with ammoniacal liquor by the pipe fat its top the stopcock of the pipe h and
the stopcock b² of the tar main b as well as the stop cocks d, d in the pipes c, c are
opened. As the tar and ammoniacal liquor are deposited in the hydraulic main a the
tar from its greater density forms the lower stratum and passes by the vertical con-
necting pipes c, c into the tar main band from: thence into the receiver e.
The tar thus passed into the receiver e displaces the ammoniacal liquor in the said
receiver e which liquor rises through the pipe h into the hydraulic main a from which
when its level becomes higher than is required for sealing the dip pipes a², a² in the
said main a it passes by the pipe n into the seal pot q and from thence through the
pipe into the storage well. When the tar in the receiver has risen to the level of

page_text: the overflow pipe k, which can be ascertained by opening the stopcock in the said
pipe, it is emptied of its contents in the following manner.
The stopcock in the tar main b is closed and also the stopcock i in the pipe h and
the stopcock or valve m as well as that in the pipe k are opened and the whole of the
tar flows out of the receiver by the pipe into the storage well. The valve or stop
cock m and that in the pipe k being closed the receiver e is again filled with
ammoniacal liquor through the pipe at f, the height of the liquor in the receiver being
ascertained by means of the vertical air pipe or gauge 9 and the valves and i being
again opened the operations described are repeated until the receiver e is again filled
with tar.
Instead of filling the tar receiver e with ammoniacal liquor after each time it has
been emptied of the tar the said receiver may be filled with water or other liquid.
Having now particularly described and ascertained the nature of my invention and
the manner in which the same is to be performed I declare that what I claim is :-
:-
In apparatus for removing tar from the hydraulic mains used in the manufacture
of coal gas, the combination with the hydraulic main of the secondary or tar main b
and its connecting pipes c, c and the tar receiver e, the said hydraulic and tar mains
being connected with the tar receiver and the hydraulic main with the seal pot into.
which seal pot the ammoniacal liquor or other liquid passes when its level has become
higher than is required for sealing the dip pipes in the said hydraulic main, the several
parts being arranged and working substantially as and for the purposes herein before
described and illustrated in the accompanying Drawing.