AISHCHEM-AS 908 is a polymeric formulation designed for the prevention of scale formation in the multiple-effect evaporators. As the clear juice through various stages of evaporation to finally become a high brix syrup, the progressively higher concentrations of Calcium, Sulphates, Silicates etc. precipitate out of the system and form scales which reduce the heat transfer.
AISHCHEM-AS 908 effectively keeps these ions in solution and well dispersed, so that their tendency to deposit on the tube walls becomes much less, there by improving the heat transfer efficiency which will lead to longer runs between cleanings.
HOW IT WORKS
Most scale builds up on the tube surface in a similar way. Initially all the salts are soluble in the juice. However, there is a limit to the solubility of these salts at certain temperature and certain Brix Concentrations. When these limits are exceeded, the salt deposits on the surface of the tube leading to scale formation.
|Appearance||Clear, Light liquid|
|Chemical Nature||Blend of Poly acrylate|
|Specific Gravity||1.0 – 1.15|
|PH||7.0 + 0.2|
|FDA status||Approved CFR No. 175.5|
DOSAGE & FEEDING
AISHCHEM-AS 908 should be diluted upto 1:10 times with good quality water and fed into the evaporator system using dosing pumps. Dosage points will have to be decided depending upon the scale characteristics and mill operation conditions. Typically the normal dosage points are into clear juice and between the II,III & IV bodies.
Based on the JUICE quality (CaCO3) normally dosage varies from 15 –20 ppm. If the silica or sulphate contents in juice are more, then dosage may need to increase to suit the system.
STORAGE & HANDLING
The product is safe and harmless and permitted for direct food additive usage. Store in cool place.
Aishchem – AS 908 is packed in 250 Kgs net (260 Kgs gross) HMHDPE Drums.
The product is harmful if swallowed. If swallowed, immediate action requires drinking milk and inducing vomiting followed by medical attention. Workmen handing the product should wear gloves & goggles.