Improved Joint or Connection for Use with Pipes in Sulphuric Acid Making Apparatus.
Year: 1896

page_text: Date of Application, 5th Mar., 1896
Complete Specification Left, 5th Jan., 1897-Accepted, 13th Feb., 1897
PROVISIONAL SPECIFICATION.
Improved Joint or Connection for Use with Pipes in Sulphuric Acid
Making Apparatus.
I, PATRICK DUGGAN 25 Pier Road Rosherville Kent, Chemical Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved joint or connection for use with pipes in
sulphuric acid making apparatus and the same is carried out as follows:
The end of the pipe is provided with a loose sleeve or short pipe having a lead
covering upon the edge of same which enters the said chamber or tower thus
reducing the corrosion of same.
A hollow collar or chamber is provided which surrounds said pipe at its junction
with the acid chamber or tower, and a circulation of cold water is provided so as to
maintain the end of the pipe at as low a temperature as possible so as to prevent
corrosion.
By removing or sliding the short pipe or sleeve the whole pipe can be readily
removed much more readily than when the pipe is formed in one piece or length.
This pipe is of course used to connect the chambers or towers.
1
SM 1900
E. EATON,
Agent for Applicant.
Improved Joint or Connection for Use with Pipes in Sulphuric Acid
Making Apparatus.
1, PATRICK DUGGAN, of 25 Pier Road, Rosherville, in the County of Kent,
Chemical 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 :-
This invention relates to an improved joint or connection for use with pipes in
sulphuric acid-making apparatus; and the same is illustrated in the accompanying
sheet of drawings, in which
Figure 1 represents a vertical sectional elevation of a pipe connection constructed
in accordance with my invention,
Figure 2 a sectional elevation taken on line X-X of Figure 1 looking from
right to left in that figure and
Figure 3 a similar sectional elevation with the cover-plate, marked J in Figures 1
and 2, removed.
A represents the brick stack leading the gas away from the pyrites kilns or
sulphur ovens, not shown in the drawings. B one of the side walls of the acid
tower. C the pipe, made of cast iron, an alloy of autimony and lead, fire-clay or

page_text: any other suitable material, for conducting the gas from the stack A to the tower.
The end of the pipe C which enters the acid tower is preferably surrounded with a
hollow water-tight chamber or jacket D, through which water may be circulated
by means of the inlet and outlet pipes E, F, in order to prevent melting of the lead
sheathing G of the acid tower and which lead sheathing is worked out to a flange H
surrounding the water jacket D and kept in place by an iron strap I. The open
outer end of the watertight jacket D is closed by the cover-plate J, made in halves
and bolted to the end of the said jacket, and the water inlet and outlet pipes E, F,
may be conveniently connected to the said cover as shown. In some cases the
-circulation of water through the jacket D may be dispensed with and the outer end
of the jacket be left open, that is to say without the cover plate J, in order that
atmospheric air may be free to circulate through the jacket to keep the outer wall
thereof cool to ensure that the lead sheathing in contact therewith shall not be
melted.
Heretofore it has been customary, so far as I aware, to make and arrange the
pipe C in such manner that one end thereof is built into the side of the stack A;
and the consequence is that when it becomes necessary to renew the pipe, part of
the stack has to be pulled down, which entails the stoppage of the kilns or ovens,
and involves much inconvenience and loss of time. In order to obviate these
inconveniences I make the end of the pipe that enters the acid tower as a separate
piece and connect it to the stack by means of a removeable intermediate length of
pipe K and a dome L, or other suitable connection, with the top of the stack A.
By removing the intermediate length of pipe K room is left to draw out the end of
the pipe C from the side wall B of the said tower and to put in a new one, without
disturbing the dome L or other connections; and the operation can be performed
in a few hours whereas under the old arrangements several days are required.
The above described arrangements for facilitating the renewal of the end of the
pipe C are applicable whether the said end of the pipe is provided with a water or
air jacket D or not, and whether the said end enters an acid tower, as shown in the
drawing, or a lead acid chamber.
The water or air jacket D may extend to the end of the pipe C as shown in
Figure 1, or it may be kept short of the end so as to protect and keep cool only the
part where the lead sheathing G comes in contact with it.
Having now particularly described and ascertained the nature of the said inven
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. In a pipe connecting the stack leading the gas from the pyrites kiln or
sulphur oven to the acid tower or chamber in sulphuric acid-making apparatus,
constructing the end of such pipe that enters the acid tower or chamber with a
hollow jacket through or in which water or air is allowed to circulate, substantially
as described, and for the purpose specified.
Second. In a pipe connecting the stack leading the gas from the pyrites kiln or
sulphur oven to the acid tower or chamber in sulphuric acid-making apparatus,
constructing such pipe with a removable intermediate piece, substantially as
described, and for the purpose specified.
Third. The improved joint or connection for use with pipes in sulphuric-acid
making apparatus, constructed and applied substantially as described.
Dated this 4th day of Januari 18.
Dated this 4th day of Januar
P. DUGGAN,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent.
P. DUGGAN,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent.