IMPROVEMENTS IN THE MANUFACTURE OF SUGAR IN CONNECTION WITH THE SO-CALLED EXTRACTORS, AND IN APPARATUS THEREFOR."
Year: 1876

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of J. Brandt,
and G. W. v. Nawrocki, of Berlin, in the German Empire, for the Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF SUGAR IN CONNECTION WITH THE
SO-CALLED EXTRACTORS, AND IN APPARATUS THEREFOR." A communication
from Ernst Körting, of Hanover, in the German Empire.
Sealed the 11th May 1877, and dated the 15th November 1876.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 15th November
1876.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. v. Naw-
rocki, of Berlin, in the German Empire. IMPROVEMENTS IN THE MANUFACTURE
OF SUGAR IN CONNECTION WITH THE SO-CALLED EXTRACTORS, AND IN APPARATUS
THEREFOR." (A communication from Ernst Körting, of Hanover, in the German
Empire.)
This Invention refers to a novel method of and apparatus for imparting a small
quantity of fluid to the sugar in the extractors during the centrifugal action of the
same, for the purpose of rinsing the syrup off the chrystals and carry it away. In
order effectually to accomplish this the fluid must come into the sugar as evenly as
possible, and in such a small quantity that it does not dissolve the chrystals. For
this purpose a cloud of fog formed of steam and atmospheric air is produced outside
the extractor, and is by pipe led to the extractor. The best and simplest way of
mixing the air and steam is by using the latter as the driving power for the former,
forcing it by means of a steam jet into the receiver where the greatest water drops
settle.
Steam is let into a conical steam jet pipe from a steam supply pipe; from the jet
pipe the steam enters into the open mixing chamber or bell-mouth shaped opening
of a blow pipe, where the steain and the air commingle, and which terminates in a
cloud collecting chamber; the air is supplied to a casing surrounding this part by a
throttle or other stop valve in a pipe coming from a chamber for filtering the air if
dirty.

page_text: The casing may be supplied with return steam or fresh steam by a pipe fitted
with throttle or other stop valve. The steam-jet pipe may be adjustable by means
of a screwed cone valve stem working therein, as is well known. The jet pipe may
terminate directly in the bell mouth of the blow pipe, or into one or more suction
cones or cylinders first, as is well known; the blow pipe may be straight or conical.
The moist air arriving in the cloud-collecting chamber gets there into a state of rest
and deposits the large water drops, which drain off below by a pipe. The cloud
passes off at the upper part of the chamber by a pipe continued up into a pipe from
which branch pipes lead to the extractors; the branch pipes are by preference
movable by means of hose pipe, or in the form of a telescope with stuffing box or
water lute; near the termination, at the extractor, there is an outlet for condensed
water, and also a throttle or other stop valve, in order to prevent the entry of the
cloud when the extractor in question is to be shut off.
The air if dirty is filtered in the aforesaid air chamber; water is let into it by a
pipe with rose or similar spreading appliance, which causes it to fall against a
perforated filter cone surface. The air has to pass through the latter and through
the stream from the spreader before it comes to the top, where it is taken off to the
jet apparatus. The water falls into a funnel-and-outlet pipe, and finally passes off
through the aforesaid drain pipe. The air may however be filtered in any other or
well known manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Gerard Wenzeslaus vou Nawrocki in the Great Seal Patent Office on
the 15th May 1877.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. v. Naw-
rocki, of Berlin, in the German Empire. "IMPROVEMENTS IN THE MANUFACTURE
OF SUGAR IN CONNECTION WITH THE SO-CALLED EXTRACTORS, AND IN APPARATUS
THEREFOR." A communication from Erust Körting, of Hanover, in the German
Empire.
This Invention refers to a novel method of and apparatus for imparting a small
quantity of liquid to the sugar in the extractor during the centrifugal action, for
the purpose of rinsing the syrup off the crystals and carry it away. In order
effectually to accomplish this the liquid must come to the sugar as evenly as possible,
and in such a small quantity that it does not dissolve the crystals. For this purpose
a cloud or fog formed of steam and atmospheric air is produced outside the extractor,
and is by pipe led to the extractor. The steam and the air are forced into a
receiver, where they intermingle, and the cloud thus formed has time there to
deposit any large water drops which may have been formed. The best and simplest
way of mixing the air and steam is by using the latter as the driving power for the
former, forcing it by means of a steam jet into the receiver where the greatest water
drops settle.
The humidity of the cloud may be varied by regulation of the steam admission
aud air admission; also by letting waste steam into the receiver or into the suction
space of the apparatus.
The regulation of the various steam and air inlets may be done by cocks, stop
valves, or throttle valves. To prevent all water drops from getting into the extractor
it is convenient to arrange an outlet for the condensed water immediately above
the opening of the branch pipe into the extractor.
If the air be dirty it is best to purify it first before the cloud formation; this may
be conveniently done by sucking or pressing it through wetted filter or sieve
appliance, or by passing it through loose and by preference wetted layers of textile
fabrics.
The accompanying Drawing illustrates the mode in which this Invention is or
inay be carried into effect, Figure 1 being a side elevation partly in section and

page_text: Figure 2 a plan of an apparatus for producing the aforesaid cloud and for letting
same into the extractors.
Steam is let into a conical steam jet pipe or nozzle a from a steam supply pipe b
from the steam nozzle; the steam enters into an open mixing chamber or bell-
mouth shaped opening of a blow pipe d, where the steam and the air commingle,
and which terminates in a cloud-collecting chamber e; the air is supplied to a
casing t surrounding this part by a throttle or other stop valve in a pipe coming
from a chamber 8 for filtering the air if dirty. The casing may be supplied with
waste steam or fresh steam by a pipe k fitted with throttle or other stop valve p.
The steam nozzle a may be adjustable by means of a conical spindle working
therein, as is well known, as applied to injectors, and as here shown. The jet pipe
may terminate directly in the bell mouth of the blow pipe, or into one or more
suction cones or cylinders first, as is here shewn, in dotted lines. The blow pipe d
may be straight or conical. The moist air arriving in the cloud-collecting chamber e
gets there into a state of comparative rest and deposits the large water drops, which
drain off below by a pipe . The cloud passes off at the upper part of the chamber
by a pipe u continued up into a pipe l, from which branch pipes z lead to the
extractors n; the branch pipes are by preference movable by means of hose pipe,
or in the form of a telescope with stuffing box or water lute, as here shewn; near
the termination, at the extractor, there is an outlet m for condensed water, and also
a throttle or other stop valve v, in order to prevent the entry of the cloud when
the extractor in question is to be shut off.
The air if dirty is filtered in the aforesaid air chambers; water is let into it by
a pipe with rose h or other spreading appliance, which causes it to fall against a
perforated filter cone surface f. The air entering through the openings o has to
pass through the wetted cone surface fand through the stream from the spreader
before it comes to the top, where it is taken off to the jet apparatus. The water
falls into a funnel and outlet pipe g, and finally passes off through the aforesaid
drain pipe
The air may however be filtered in any other or well known manner.
And having thus fully described the nature of this Invention, I declare that I
claim,―
Firstly. The method here described of rinsing the sugar crystals in the extractors,
namely, by means of a cloud or fog, consisting of air and steam artificially produced
outside the extractors, and previously when required, passed through a collecting or
water-settling chamber.
Secondly. The production of the fog or cloud by means of steam-jet appliance,
for the purpose set forth.
Thirdly. The application of a chamber for collecting the cloud and for allowing
the larger water particles to settle therein, for the purpose set forth.
Fourthly. The filtering of the air to be used in the production of the cloud or
fog by means of water spray and sieves, or other filtering appliance.
Fifthly. The arrangement of parts for producing and applying the fog or cloud,
as hercin described with reference to the Drawing.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have hereunto
set my hand and seal, this Eleventh day of May, in the year of our Lord
One thousand eight hundred and.seventy-seven.
GERARD WENZESLAUS v. NAWROCKI, (L.S.)