IMPROVEMENTS IN APPARATUS AND PROCEEDINGS FOR PURIFYING AND FILTERING OF WATERS be as follows:
Year: 1885

page_text: I, LOUIS SCHRÖTER of Guben in the German Empire, Civil Engineer and
Manufacturer, do hereby declare the nature of said invention for "IMPROVEMENTS
IN APPARATUS AND PROCEEDINGS FOR PURIFYING AND FILTERING OF WATERS
be as follows:-
"
to
This invention relates to improvements in the method of and means for purifying
and supplying water to steam boilers.
For this purpose I construct a metal casing to the bottom and in the centre of
which is fixed a pipe reaching to nearly the top of the casing and connected at its
lower end with the pipe leading from the feed pump of the boiler; its upper end is
open. Around its upper part are arranged a series of perforated plates and beneath
these latter is a grating upon which coke or other suitable filtering substance
is placed. Between the grating and the lowermost of the series of perforated
plates is fixed a pipe or cylinder concentric to and larger in diameter than the
central fixed pipe so as to form a passage between the central pipe and the outer
one surrounding it. The upper part of the casing is in communication with the
steam space of the boiler and at a point lower down but above the grating it is in
communication with the water space of the same, through pipes fitted with self
acting valves in the manner hereinafter described.
When water is forced by the feed pump into the fixed central pipe it passes out
at the top of the same, falls on to the series of perforated plates arranged in the
steam space, thence passing downwards through the passage formed between the
two concentric pipes. Here by reason of its augmented temperature the particles
which go to form scale or incrustation become deposited at the bottom of the casing
whence they are blown out as occasion may require. The water now at the bottom
of the casing passes upwards through the filtering substance and flows automatically
into the boiler.
In order to be able to have access to the apparatus independent of the working
of the boiler all the connecting pipes are provided with cocks or stop valves.
In connection with this apparatus I apply a novel process for removing earthy
acids and gypsum from water intended for use in steam boilers. This is done by
Price 8d71

page_text: connecting a chemical pump with the feed water passage and supplying thereto a
small quantity of soda or other suitable chemical in the form of a watery solution.
The solution on being heated precipitates the gypsum and other foreign matters.
In this way a special clarifying tank and the use of hydrate of lime in the usual
manner is dispensed with.
The exterior surface of the casing is cooled down for the purpose of obtaining a
decrease of pressure within the same, from which it results that the feed water is
in some measure drawn into the apparatus through the fixed central pipe by
suction. The feed water in passing out of the apparatus, to the boiler to be fed
automatically, operates a float which is connected to and sets in motion a lever,
this latter being also connected to a valve in the pipe leading from the steam space
of the boiler to the casing. When the purified water rises above the filtering
substance the float also rises and controls through the lever, the valve, in such
manner that the exit of feed water and the entrance of fresh steam is automatically
regulated.
The constmuation of the annanotur men be variously modified

page_text: Filtering of Waters.
I, LOUIS SCHRÖTER of Guben in the German Empire, Civil Engineer and
Manufacturer, do hereby declare the nature of said invention for "IMPROVEMENTS
IN APPARATUS AND PROCEEDINGS FOR PURIFYING AND FILTERING OF WATERS
"
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 the method of and means for purifying
and circulating water of steam boilers.
For this purpose I construct an apparatus such as is represented in the accom-
panying drawing, Fig. 1 being a sectional elevation, and Fig. 2 a plan thereof. It
consists of a metal casing A to the bottom and in the centre of which is fixed a
pipe a reaching to nearly the top of the casing and underneath the casing is
attached a pipe a¹ the other end of which is in communication with the water
space of the boiler or boilers the water of which it is desired to purify & circulate.
The water is caused to pass from the boiler or boilers in the manner hereinafter
described through the pipe a¹ into the pipe a in which it rises and overflows the
edge b when the particles which go to form scale or incrustration become deposited
at the bottom of the casing whence it may be removed by blowing out or in any
other suitable way as occasion may require. The purified water passes out through
the aperture B back into the boiler or boilers. The circulation of the boiler water
through the apparatus is caused by the condensation of steam from the boiler or
boilers in combination with the action of the float F and steam valve C.-E is a
lever one end of which may turn on a fixed point D and the other end is raised or
lowered by the action of the float F assisted by the counterweight G and lever g.
By the action of the lever E brought about by the rising or falling, as the case may
be, of the water within the apparatus the steam valve C in communication with
the steam space of the boiler or boilers is either opened or shut. When it is shut
a condensation of steam takes place within the apparatus and causes a decrease of
pressure therein from which it results that the boiler water is drawn into the
apparatus through the pipes a, a, until it rises sufficiently to relieve the lever E
and allow of its being lifted by the counterweight G and lever g thereby opening
the steam valve C. In this way an equality of pressure is formed within the
apparatus and the water level falls until it reaches the aperture B or any other
determined level. The return operation then takes place and so on continuously.
Check valves are fitted to the inlet and outlet water passages.
Instead of the circulation of the water being effected automatically by conden-
sation the same result may be attained by the use of a pump.
I prefer to discard that portion of my invention which is described in my
provisional specification as relating to the employment of perforated plates, outer
pipe concentric with the central pipe a, grating and filtering substance. I also
prefer to discard that portion relating to a process for removing earthy acid and
gypsum from water.

page_text: Having thus 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. The process for effecting a constant circulation of boiler water between a
steam boiler or steam boilers and a separate apparatus in communication with
the same for the purpose of purifying the water substantially as described and
illustrated.
2. The arrangement and construction of float and mechanism for utilising the
action of the same in combination with a steam valve for the purpose of obtaining
an automatic circulation of the water of a steam boiler or of steam boilers substau-
tially as described and illustrated.