Translation 2783

^.le res?âüal
a gla,ss ti, inci.ota; it is poured off into scttlinU--tani:s.
-oart is tre.nsferred to super-decanters for further - :processing.
°t e oi l-separator i s a vertical tank, consisting of a cylindrical
Oi.l-se]parators are of several types
body and •'pr;o spherical bulges.
art of its
l'he principal part of an oil-separator is the stean--dome.
The end. of the cylinder may be
cylinder lies within the oil-sepa.rator.
drawn out into a cone and may terminate in tne middle or upper part of
the oil-senarat.or.
r
acuia.-^i-^•
r^aratuses. '.rIie essence of this me thod 237
Jb_ta.i _oil ; r: v ^ ^v..
is the removal of moisture frorn previously-shicedded raw material (sub--
cutaneous blubber, and partly peritone?,,rR; in a vacuum at a relatively
loW temperature.
The line of va.cuu_-i--apT)aratuses contaiï.s the following machines.
The raw meaterial is finely cut in a disc-shredder or a multiûisc
blubber-cu'u Ler . 'raithin the steel tank of tfie disc-shredder is mounted
a roller with a cast-steel disc, on vhich there are two (so:::etir,_es more)
lamellar knives.
In addition, a fixed ^^nife is attached to the lower
-nart of the tank. As the roller rotates the contained raw raaterial is
machine,
cut into small l)J.eces, which are passeCt out into a
In a multidisc blubber-cutter rows of disc-icnives are mounted
on two rollers. The rollers rotate in opposite directions at different
speeds.
The pieces of blubber pass fro:.i that machine -co the sausagemeat
machine for shredding.
The sausage-meat machine consists of a cast-iron tank, within
which a cast-iron screw (worm) rotates. The entering mass is passed into
a cutting :rechanism, so much end-thrust beii!g created that the pieces
of blubber are forced. tnrougii a fi-xed disc-knife and ai:e finely chopped
by a rotating cross-shaped knife. Ther_ the chopped mass passes through
a fixed screen with apertures 18-20 mm in diameter. The blubber is
further shredded by a moving.cross-shaped knife, and then passes through
a screen with apertures 8-10 mm in dia.meter.
The finely-shredded mass then enters a heater-tank, whi.ch may
be constructed in various ways. it is usually a metal vat witil•,•ralls
7 mm thick, i;*itn a steam-jacket. The mass is passed on by a stirring
E
cevice ••mour.ted in the tank, shal:ec. liice two racks arrangod cross-wise.
;
e ca.,,a.city of the heater-tank is 21 . 35 cubic metres.