Automatic Massecuite Conditioning System

Western States - Automatic Massecuite Conditioning SystemPerformance Increase & Economic Benefits

  • Increase centrifugal throughput up to 35% by improving massecuite flow and crystal separation properties even at temperatures below 50°C
  • Reduce molasses purity rise by eliminating:
    • Crystal breakage caused by friction in filtering screens
    • Crystal dissolution caused by hot spots (heat exchanger water temperature is kept below 60°C)
    • Crystal dissolution caused by the use of water and/or steam by the centrifugal as it is minimized or eliminated altogether
  • Avoid higher than desired molasses temperature by reducing or eliminating steam used at the centrifugal
  • Provide constant and uniform feed stream to centrifugal as measured in brix and volume
  • Extend life of filtering screens due to the improved lubrication of massecuite

Typical Methods of Reducing Massecuite Viscosity

While the addition of final molasses to massecuite has been used before to reduce massecuite viscosity, the problem has always been the lack of thorough mixing due to differences in viscosity and flow properties. Another method employed involves the use of steam or water in heat exchangers or centrifugals, however its effectiveness is limited as hot spots and inadequate heat transfer in the former or very short contact time in the latter cause sucrose losses in final molasses and waste energy.

Solution

The Western States Massecuite Conditioning System combines a precisely brix controlled molasses stream with the massecuite. Because the molasses is partly saturated with sucrose, dissolution of the sugar crystals is negligible. The molasses and massecuite streams immediately enter a special mixer which gently blends them for a predetermined amount of time. The conditioned massecuite shows an immediate improvement in its flow properties and it is then fed to the centrifugal feed tank or manifold.

Control

Conditioned massecuite viscosity is controlled by monitoring the power usage of the mixer motor. The higher the power required by the motor to turn the mixer, the higher the viscosity and the more molasses are needed. This feedback is then used to adjust the amount of brix controlled molasses that is added to the massecuite until the desired viscosity is obtained.

System Components

  • PLC controller, readout, operator interface
  • Molasses dilution tank and mixer
  • Surfactant tank and pump (optional)
  • Transfer and metering pumps
  • Control valves
  • Temperature probes
  • Massecuite and molasses mixer/conveyor

Massecuite Conditioning Process

Western States - Massecuite Conditioning Process