NEW CONCEPTS IN SPRAYING DISPERSANTS FROM BOATS
ABSTRACT A new approach to applying chemical dispersants from boats has been developed. The equipment has a greater swath width and, thus, greater coverage rates than existing technology. Coverage rates of 2½ square miles per day per boat are likely and four or more square miles per day is possible. The method utilizes high speed fans which create a focused air stream with maximum velocities of 90 miles per hour. Dispersant is injected into and propelled by the air stream. With the air stream acting as a carrier for the dispersant, the spraying of smaller volumes of concentrate dispersant or dilute dispersant over a wide swath width is made possible. The focused air stream and dispersant impacts the water surface in approximately a straight line. The water surface is gently agitated by the air stream and liquid impact. A dispersant fan sprayer has been built and tested statically on land and demonstrated offshore on a supply vessel while spraying water. Design parameters include fan size, air stream velocity, expected swath width, and concentrate (low volume) versus dilute (large volume) spraying.