K-Patents SeedMaster 2 - Manual (Page 8)

2 SUGAR CRYSTALLIZATION IN BRIEF 8
8
Supersaturation
SEEDING POINT
Density
Level
Motor power
Draw in Concentrate Graining Boiling Boiling Discharge
up
Fig. 2.2
Full seeding is the advanced mode of seeding. In ideal case there are no new crystals formed during
seeding: the full required crystal crop is supplied during seeding in the form of well prepared slurry. It is
assumed that only crystal growth and no nucleation will take place during the complete length of
crystallization (during a strike in batch pans), that is the number of crystals in the end product is in ideal case
equal to the one of the seeding material.
Besides using slurry, full seeding can be implemented by using the right amount of crystal footing (magma),
too. It follows from the above that in case of full seeding and during the complete crystallization
supersaturation must not exceed its limit value. This requirement may result in somewhat longer times of
crystallization than accustomed, but will result in better sugar quality.
Supersaturation
Density
Level
Motor power
SEEDING POINT
Draw in Concentrate Graining Boiling Boiling Discharge
up
Fig.2.3
Fig. 2.3 shows some of the trends typical of full seeding.