The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1914-12-04


advance of the year r,as The invention
of the Macsschaert Groove roller and
of number Of others which have fol.
lowed this general idea The average
extraction in Hawaii has increased one
and a half per cent due to the general
adoption Of the Maesschaert system.
This is q clear gain Of over 5000 tons
OF sugar in ono year
Hawaiian extraction j. still below
the average practise IN Fiji and Aus.
tialia, he said. They use maeeration
iaths and more water, sometimes as
high az volume for volume with the
ipice. Mr.. Norris said that improve
nent in mill feeding is desirable and
would increase the capacity Of the
mills.
j. r. NOR said that with the Maess-
rhaert roll doing such good work Ia
bcttering the extraction and decreasing
the moisture of the bagasse the min
engineers should reverse their mill
practise. "Accelerate the speed Of tho
fret mill, he said, ~ and slow up the
last two sets. The last ron hash 4
enough work to do now unless we run
II slower and keep the bagasse under
pressure for a longer period
John Scott said chat it has been his
Practise this year since installing the
Maesschaert system. lie has reduced
the speed Of the last set from ffty.
four 10 thirty-two revolutions and has
averaged 07.63 extraetion.for the entire
crop. Cane to feed 10 tho best adyan,
tago, ought to be shredded or finely
chopped, he said f
Juice Qualification
Mr.. Norris quoted from his report OF
the claiifcation OF juices, q A new sys
ten Of delivering juice into settling
tanks is being tried in several fac
tories along the lilo coast. The Juice
from the heaters passes first into the
top Of a tan cylindrical tank, from
which II flows out Of the bottom and
in through the bottoms of the settling
tanks. In this way air and other gases
t,are eliminated in The Distributing tank
and the muddy juice flows into the set.
ling tanks with as little disturbance
As possible. This Stimulates, in way
the old method of settling in tanks usee
for both heating and settlipg.t
Evaporation and Pro-Heating
] The adoption cf auxiliary heatin;
lqnd evaporation. FIRST applied during
the 1912 season BY tho Hawaiian Aeri
cultural Company, is being gradually
extended 70 other factories, Mr.. Norris
said. There Is. OF course, nothing new
In the sugar industry in the use Of pre-
heaters, bat il is new TO these Islands
Irc.heating the clarified mice before
IL enters the evaporator increases the
capacity Of eveDorators In two ways. IN
Is usual 10 bnild evaporators with the
same amount of heating surface IN
each coll, SO that under average condi.
tons the cells are OF equal capacity
Wheneyer the juice enters the FIRST eel
below the boiling point q certain
amount Of the heating surface in that
cell is required to bring il up to the
tempersture NJ which It will boil under
the pressure in the cell.
This means a. reduction in the avail.
able heating surface, not only in the
drst cell but to the same extent in the
pther cells also. II for any reason
only half the heating surface is used
in the first cell of an evanorator, made
lup Of cells Of equal capacity. then only
h9lf the heating surface in all the other
cells is made use of. The juice entering
the evaporator, unless pre- heated. is al.
Why's more or less below the boiling
point.
A pre- heater win, therefore, increase
the capacity OF an evaporation by max
irR all Of the heating surface Of sfhe
1 FIRST cell available. There Is, besides
this a further inerease In evapotatiou,
throuch pre.hoating when the juice Is
saired ebova tho point at which II will
boil under the pressure in the first cell
/ IN this case whom released into the first
cell paFt Of the juice win eyaporate
gentarenuslv.
4 The Fdvnntuge derived from pre- eva.
npratiHr whero the vapors are used for
ipiee heating and in vacuum pans
comes from the extension Of the prin,
,tPJs ~ inuItinle effect evaporation "a
Other process than thin juice evapora,
lion.
I Willism Pullar said that pre.evapora
tien has increased his output ten tom
! of siiEaY nor aav.
Rcsnerv Prnblsnls
I, FsA Podenboim 90 tho Crockett Re
Srer" on rave an interesting account
lof tle reGn;ne rrceese and OF refinery
o"r''"r 10 said that besides snei
qreHltnfai inuNnities as watehes
knives, bolts and units, the relners had
. f. . t. ,