B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
354/21, 341/5
B01J 2/04 (2006.01) B01J 2/06 (2006.01) C05C 9/00 (2006.01) F26B 25/22 (2006.01) G05D 22/02 (2006.01)
Patent
CA 1206229
CONTROL SYSTEM FOR DRILLING TOWER ABSTRACT OF THE DISCLOSURE An apparatus and method for controlling moisture content of prilled products which are produced by air drying a spray of the liquid product, comprises a vessel for receiving a flow of air and a flow of the liquid product, a supply line for supplying air to the vessel and a supply line for supply- ing liquid product to the vessel. The product is advantage- ously a solution of urea. Moisture content is measured or inferred for the product flow, the input air and the air coming out of the vessel. An air flow controller is connected for controlling the flow of air into the vessel which control- ler is itself controlled by a circuit that calculates a desired air input flow rate for a selected moisture concentr- ation in the prilled urea product. -14-
436682
Babcock & Wilcox Company The
Ridout & Maybee Llp
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