Concentrating evaporators – Spray type – Gaseous current
Patent
1984-01-10
1986-02-04
Bascomb, Wilbur
Concentrating evaporators
Spray type
Gaseous current
159 44, 159 472, 159 481, 34 34, 34 54, 364500, 564 73, B01D 114, B01D 118, B01D 342
Patent
active
045684170
ABSTRACT:
An apparatus and method for controlling the 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 (10), a supply line for supplying air to the vessel (14) and a supply line for supplying liquid product to the vessel (16). The product is advantageously 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 (24) is connected for controlling the flow of air (14) into the vessel (10) which controller is itself controlled by a circuit that calculates the required air input flow rate for a desired moisture concent in the prilled product.
REFERENCES:
patent: 2671968 (1954-03-01), Criner
patent: 2842193 (1958-07-01), Ballestra
patent: 3128159 (1964-04-01), De Francisci
patent: 3130225 (1964-04-01), Friend
patent: 3186102 (1965-06-01), Brociner et al.
patent: 3188783 (1965-06-01), Savage
patent: 3525162 (1970-08-01), Brewer et al.
patent: 4003137 (1977-01-01), Bjorn et al.
patent: 4386471 (1983-06-01), Bowrey et al.
patent: 4424072 (1984-01-01), Lerner
Bascomb Wilbur
Edwards Robert J.
Matas Vytas R.
The Babcock & Wilcox Company
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