IMPROVEMENTS IN EVAPORATING AND DRYING Apparatus, especIALLY APPLICABLE TO THE TREATMENT OF LIQUID SEWAGE
Year: 1881

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the Firm
of J. Brandt & G. W. v. Nawrocki, Patent Solicitor and Civil Engineer,
of 124, Leipzigerstrasse, Berlin, Germany, for an Invention of "IMPROVEMENTS
IN EVAPORATING AND DRYING Apparatus, especIALLY APPLICABLE TO THE
TREATMENT OF LIQUID SEWAGE." A communication from Julius Swiecianowski
and Stanislaus Adamczewski, both of Warschau, Poland, in the Empire of
Russia.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 25th June
1881.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the Firm of J. Brandt
& G. W. v. Nawrocki, Patent Solicitor and Civil Engineer, of 124, Leipziger-
strasse, Berlin, Germany. "IMPROVEMENTS IN EVAPORATING AND DRYING APPARATUS,
ESPECIALLY APPLICABLE TO THE TREATMENT OF LIQUID SEWAGE." (A commu-
nication from Julius Swiecianowski and Stanislaus Adamczewski, both of Warschau,
Poland, in the Empire of Russia.)
This apparatus is so arranged that the heat from the fuel is utilized as much as
possible, and consists in a number of evaporating pans which are arranged in an
oven on each side of a central bridge like structure, each pair having a fire grate;
there are also two drying rooms divided into chambers corresponding in number
with that of the pans.
The space under each pan is by a tongue or wall divided in two flues or spaces,
one of which contains the grate and the other contains pipe systems, say two,
which serve for the heating of air, and is also by a flue connected with the firing
space under the adjoining pan, and by another flue with a main smoke flue or flues
leading to a chimney or condenser; there are dampers to all these flues.
Heated air is by means of flues leading to the one set of the aforesaid pipe
systems and by flues above the pans, and by other flues leading to the other set of

page_text: the pipe systems and flues leading from them, conducted to the drying rooms which
are arranged outside the rows of pans. There are also flues direct from the hot air
supply flue to the drying chambers. The air charged with the moisture in the
latter and in the spaces above the pans is by flues conveyed to collecting flues
leading to the chimney.
The drying rooms are constructed with a stair-like floor, the air passing through
spaces left between each two steps. The roof may be of glass.
The mode of operation is as follows:-Supposing there are 64 pans, the one
numbered 1 being, say the ninth from the end, and all the pans from No. 1 to
No. 60 being filled with liquid which is being evaporated, all the dampers between
the spaces below the pans are then open except those between 64 and 1, and
between 60 and 61, and all the dampers for the flues leading therefrom to the
chimney flues being shut except the one from 60. When firing under pan 1 the
gaseous products of combustion will pass from under all the pans 1 to 60 in
succession, and will from 60 pass into the flue leading to the chimney.
When the material in pan 1 is sufficiently dry the operator advances a stage and
exposes the pan 2 to its direct fire while the contents of pan 1 are put in the
corresponding bay or compartment of the drying room for further drying.
This apparatus is especially applicable to the evaporating and drying of sewage,
the flues from above and below the pans carrying the gases into the drying
chambers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office on the
24th December 1881.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the Firm of J. Brandt and
G. W. v. Nawrocki, Patent Solicitor and Civil Engineer, of 124, Leipziger-
strasse, Berlin, Germany. "IMPROVEMENTS IN EVAPORATING AND DRYING
APPARATUS, ESPECIALLY APPLICABLE TO THE TREATMENT OF LIQUID SEWAGE."
(A communication from Julius Swiecianowski and Stanislaus Adamczewski, both
of Warschau, Poland, in the Empire of Russia.)
This apparatus is so arranged that the heat from the fuel is utilized as much as
possible, and consists in a number of evaporating pans which are arranged in an
oven on each side of a central bridge-like structure, each pan having a fire-grate;
there are also two drying rooms divided into chambers corresponding in number
with that of the pans.
On the accompanying Sheet of Drawings, Figure 1 is a sectional plan of such an
apparatus; and Figure 2 is a transverse section; and Figure 3, a part sectional
plan, both drawn to a larger scale than that of Figure 1; in this case there are
64 evaporating pans P which are carefully set in brickwork in two rows, one on
each side of a bridge or platform R.
The space under each pan P is by a tongue or wall divided in two flues or
spaces A and B, one of which A contains the grate and the other B contains pipe
systems, say two such v and which serve for the heating of air, and is also by a
flue connected with the firing space A under the adjoining pan, and by another
flue with a main smoke flue or flues leading to a chimney or condenser; there
are dampers x and y to all these flues.
Heated air is by means of flues a, b, leading to the one set of the aforesaid
pipe systems and by flues c, d, leading from them conducted to the spaces above
the pans, and heated air is also by other fiues e, f, leading to the other set of the
pipe systems and by flues g, h, leading from them conducted to the drying rooms T
which are arranged outside the rows of pans. There are also flues l, m, leading
directly from the hot air supply flue to the drying chamber T. The air charged
with the moisture in the latter and in the spaces above the pans is by flues o, P, Q,
and s conveyed to collecting flues 7 leading to the chimney.
The drying rooms are constructed with a stair-like floor, the air passing through
spaces left between each two steps 2, as indicated by arrows in Figure 3. The roof
may be of glass.
The mode of operation is as follows:-Supposing there are 64 pans, the one
numbered 1 being, say the ninth from the end, and all the pans from No. 1 to
No. 60 being filled with liquid which is being evaporated, all the dampers x
between the spaces below the pans are then open, except those between 64 and 1,
and between 60 and 61, and all the dampers y for the flues leading therefrom to
the chimney flues being shut except the one from 60. When firing under pan 1
the gaseous products of combustion will pass under all the pans 1 to 60, in
suceession, as indicated by the arrows in Figure 1, and will from 60 by the flue i
pass into the flue K leading to the chimney D.
When the material in pan 1 is sufficiently dry the operator advances a stage and
exposes the pan 2 to its direct fire, while the contents of pan 1 are put in the
corresponding bay or compartment of the drying room T for further drying.
This apparatus is especially applicable to the evaporating and drying of sewage,
the flues o, p, q, s, and r from above and below the pans carrying the gases into
the drying chambers.

page_text: And having thus described the nature of this Invention, and in what manner the
same is carried into effect, as communicated to me, I declare that I claim,-
First. In an evaporating apparatus, the arranging of the evaporating pans P and
their fire-places in two parallel rows, all the fire places being connected with each
other and with a common smoke flue K, so that by the application of dampers
andy a large number of the pans may be heated by the products of combustion
from one fire-place, as set forth.
Second. In an evaporating apparatus, the arrangement of the flues a, b, c, and d,
and e, f, g, and h, and the pipe systems and t, and the flues m and n for heating
the air for the pans and drying rooms, in combination or not with the exit flues o,
2, 9, and s leading to the flues r, as set forth.
Third. The stair-shaped drying rooms T for the boiled down materials arranged
in combination with the evaporating pans, as set forth.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal, this Nineteenth day of December, in
the year of our Lord One thousand eight hundred and eighty-one.
GERARD WENZESLAUS VON NAWROCKI. (L.S.)