Totally Enclosed Hood & Air System
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The closed PM hoods, encasing entire paper machines are designed to satisfy the demand of high dew point operation, thereby achieving an efficient, uniform and economical paper web drying.During the drying process a large quantity of moisture is evaporated from the paper web. This moisture is discharged to the atmosphere through Hood exhaust fans. Part of the heat carried along with the exhaust air is recovered in pre-heating the Hood Make-up air in Heat Recovery Units.The make-up air, thus pre-heated, is further heated in water-air and steam -air heat exchangers and introduced in the paper machine through various blow boxes via centrifugal supply air fan and ducting.
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