The Ottawa free trader. [volume] (Ottawa, Ill.) 1843-1916, 1876-04-15


Il will be seen that il Is soluble in two and
one.hali parts of water at 60 deg ana In one
part at 2l2, cold being produced during so
luton. According to the mode OF employ.
ment ammonia is refrigrant, laxative or
duratlc, and on account of its rcirigrant pro.
pensites 1t is used in the manufacture OF ice.
| The Aqua Ammonia" or water strongly
/ impregnated with ammonia gas, Is nrst put
into retCrt, and heated by means OF steam
coil The gas then leaves the water, passes
through d series Of coils which are surround
ed by a constant stream of river water, which
! is being condensed.
The gas produces a pressure of 200 BIS to
the square inch, and under this pressure it is
louitcd. 1t will be observed that it is only
LIQUID in the first place under pressure,
and passed through An exceedingly small
opening, which expands II series of large
pipes, and In this expansion it requires an
Immense amount of heat, which 1t receives
from everything surrounding it-but ofpart OF
which 1t was robbed by the cold water when
Condensing.
Where the expansion takes place are four
large tanks-dvldeI into four apartments,
each apartment containing several hundred
coils of pipe, outside Of which is salt water.
The gas absorbs the heat from this salt wa
ter, thereby reducing it to about twelve de-
grees below zero.
There are put into each of these tanks OF
salt water GIG tin cans, and each can holds
about twenty lbs Of condensed or distilled
water. These cans are about twenty inches
long, ten wide, and three IN thickness; one
of which is drawn out every minute or SO,
containing solid slab of ice.
Slab after slab are placed upon each other
until block of any size required is made,
and frozen solid as they are piled up by dash
ing cup of water on them as they are layed
on; for convenience of building they are
made into blocks of 100 Tbs each.
After the ammonia gas has absorbed
sufficient heat u bring 1t back to its original
state, it returns by another pipe into large
cylinder, where it meets once more the water
il was taken FROM and this water having been
cooled by passing through pipes surrounded
BY "rver water" water in its original state)
absorbs the gas, and by means Of d pump
goes back into the retort or boiler from
whence it started; and in this way goes
through the same process over and over again,
and consequently there is no loss of Ammonia
In order to give better explanation, will
illustrate in this wayne will suppose
A, TO be retort in which ammonia is
heated.
b, gas pipe to condenslng tank.
C, condensing tank with pipes surrounded
by river water.
d, receiver Of liquid gas.
f, consealpg tank with pipes surrounded
by salt water In which the moulds are put.
F, vase Of INSCRIPTIONS with coils Of pipe in
which river water runs to cool ammonia.
G, pump.
II, exchanger, where the ammonia being
cold is heated by passing through the coils.
|, pipe from each to boilers.
X, pipe where the poor ammonia is taken
from the boilers.
IL, u CoOlcl'
r, where il meets the gas-absorbs it ant
returns through G., Che pump ii, (the ex
change,) l, (the pipe from boiler to A, (tht
retort or where it started from heated)
AS soon as the ammonia is heated the ga'
passes from A, Uhe retort or heater to B, c
condensing tank thence to Z, (congealinl
; tank with pipes surrounded by salt watc
with the moulds) to +, vase of ABSORPTION
; with coils of pipe and river water to cool thu
ammonla).
This makes the clearest ice, as only dis
titled water is used, condensed from the wa
tiers of the "rolilng Mississippi
This ice is delivered to consumers at tiftcer
dollars per ton (three quarters of cent PEE
pound. J. ID. HAMMOND.