GLYCERINE RECOVERY
	Multiple effect system for better steam economy
	Evaporation can be carried out in a single effect, though uneconomically. With every additional effect, steam is saved on a reducing scale. Hence, optimum number of effects is selected which ensures desired rate of return on the investment made.
	Feed Preheating System
	When the feed is at a temperature less than that of the effect, significant part of the steam is wasted in raising the sensible heat of the feed. Feed preheating by using bleed vapors from the effects will considerably increase the steam economy. Such increase in steam economy is quite significant in forward feed system.
Liquor Feeding Arrangement For Maximum Efficiency Under Given Process Conditions
Liquor feed arrangement can be selected in Backward, Forward, Mixed or Parallel fashion, depending on the process conditions, to ensure maximum plant efficiency. The steam economy can be augmented by employing Feed Preheating System whenever necessary.
Condensate Flash Recovery System
Since the effects of the evaporation plant are operating at decreasing pressure, It is possible to flash the condensate from the effects successively at lower pressure and utilize the flash vapors to effect more evaporation, thus reducing the live steam requirement. The saving in live steam becomes more significant with increase in the number of effects.
Crystal Growth & Removal
Sometimes, evaporation is accompanied by crystallization, e.g. concentration of diaphragm cell caustic liquor, glycerine lye, sodium dichromate liquor etc. In such cases, a suitable scheme is provided to avoid precipitation in the heat exchanger tubes, allow crystal growth in the evaporators or setting tanks and separate the fully grown crystals in suitable filters.