Application:
A converting mill producing a range of specialty coated printing and copier papers, required a steam injection heater for cooking cationic starch slurry, up to 35% solids. The heater serves a dual function. First, water is pre-heated to 140°F and blended with starch powder. Then the starch slurry is pumped back through the heater at a rate of 40 GPM and cooked at 200°F. Depending on the recipe, post dilution is used to obtain final consistency.
Process Conditions:
Slurry and Water Flow Rate: 40 GPM Inlet Temperature: 50°F Final Cook Temperature: 200°F Steam Pressure: 65 PSIG Water Pressure: 50 PSIG Required Steam Flow: 2,580 lb/hr
Solution:
A Pick Model 6X25-3BX Heater was selected for this application. Its generous flow-through design imposes negligible pressure drop on the slurry. It provides thorough cooking at a precisely controlled temperature. The low velocity design minimizes mechanical shear of the starch granules, an important factor for most cationic starches.
Features and Benefits:
• Low Pressure Drop • Precise Temperature Control • Low Mechanical Shear • Compact Design • Non-Plugging
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