IMPROVED PROCESS AND APPARATUS FOR PURIFYING WATER USED IN STEAM BOILERS
Year: 1884

page_text: I, DUGALD CLERK, of 48 Wellington Street, Glasgow, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of my said invention for
IMPROVED PROCESS AND APPARATUS FOR PURIFYING WATER USED IN STEAM
BOILERS to be as follows:-
54
My said Invention has for its object the purification of the water used in steam
boilers and comprises a process which is specially suitable for dealing with water
containing lime or its compounds or similar matters which become precipitated or
thrown out of solution when the water is heated or evaporated and which by
forming incrustation or scale give great trouble and diminish the efficiency of the
boiler.
My Invention consists in making the water of the boiler circulate continuously
through a filter connected to the boiler by pipes, so that as the earthy matters
become precipitated as the evaporation goes on they are carried by the circulating
current to the filter and by it prevented from returning to the boiler. The water
is made to circulate through the filter by a pump to which the piping is connected;
and the pipe leading the water from the boiler is connected thereto near the
bottom whilst the pipe leading the filtered water back to the boiler is connected
thereto near the water surface and at a part as far as conveniently possible from
the other pipe. The feed water is supplied by a pipe connected to the circulating
system at such a part that it has to pass through the filter before entering the
boiler. Any suitable kind of filter may be used but I prefer to use an improved
kind which forms the subject of another Application for Letters Patent of tho
same date as the present Application.
EDMUND HUNT,
Applicant's Agent.

page_text: STEAM
I, DUGALD CLERK, of 48 Wellington Street, Glasgow, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of my said invention for
"IMPROVED PROCESS AND APPARATUS FOR PURIFYING WATER USED IN
BOILERS " and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, that is to say :-
My said Invention has for its object the purification of the water used in steam
boilers and comprises a process which is specially suitable for dealing with water
containing lime or its compounds or similar matters which becomo precipitated or
thrown out of solution when the water is heated or evaporated and which by
forming incrustation or scale give great trouble and diminish the efficiency of the
boiler.
My Invention consists in making the water of the boiler circulate continuously
through a filter connected to the boiler by pipes, so that as the carthy matters
become precipitated as the evaporation goes on they are carried by the circulating
current to the filter and by it prevented from returning to the boiler. The water
is made to circulate through the filter by a pump to which the piping is connected;
and the pipe leading the water from the boiler is connected thereto near the
bottom whilst the pipe leading the filtered water back to the boiler is connected
thereto near the water surface and at a part as far as conveniently possible from
the other pipe. The feed water is supplied by a pipe connected to the circulating
system at such a part that it has to pass through the filter before entering the
boiler. Any suitable kind of filter may be used but I prefer to use an improved
kind which forms the subject of another application for Letters Patent of the same
date as the present Application.
On the accompanying sheet of explanatory drawings figure 1 is an end elevation
and figure, 2, is a plan showing apparatus for carrying out my Invention as
applied to a pair of horizontal cylindrical boilers, 3, of a common type. Branch
pipes, 4, connected to the lower parts of the boilers at one end lead tho water to
a main pipe, 5, which is connected to a steam pump, 6; and from this pump the
water is forced through a pipe, 7, into the filter, 8. From the filter, S, the water
returns by the main pipe, 9, and branches, 10, to the steam boilers, 3, the branch
pipes, 10, communicating with the boilers at their upper parts and near the ends
opposite to those at which the pipes, 4, are connected. The filter, S, of which
the exterior only is shown, is of the kind described in my Patent Specification
No 10814 of 1884, but any other suitablo kind may be used. The feed water for
the boilers is by preference made to pass through the filter, 8, on its way to the
boiler, a branch connection, 11, being provided on the filter inlet pipe, 7, for the
attachment of the feed-water pipe.

page_text: 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
The improved process and combination of apparatus for purifying water used
in steam boilers substantially as hereinbefore described.