Pharmaceutical spray drying can be improved by using the patented Delta T MC Sensing and Control Technology that is based on the first-principles-derived dryer control model, MC = K1(ΔT)p – (K2/Sq), where moisture (MC) is related to the temperature drop (ΔT) of hot air following contact with the wet product being dried and (S) is the production rate or evaporative load. This model solved the two main problems with current MC sensing and control: lack of an accurate, reliable “inside-the-dryer” MC sensor, and lack of a precise algorithm for maintaining the target MC in spite of evaporative load changes. According to the company, the technology replaces ineffective, commonly-used control methods, such as the Exhaust Temperature and Feed Rate methods, and is equal in performance to MPC at 1/6 the cost and 1/10 the training time, thus paying out in 3 to 4 months.
Drying Technology, Inc., Silsbee, TX 77656. www.moisturecontrols.com or call 409-385-6422