SYSTEM FOR DRYING AND TORREFACTION
First Claim
1. An apparatus for the torrefaction of water-containing cellulosic material within an inert atmosphere, said apparatus comprising,a material processing chamber having a plurality of processing zones adapted for processing water containing cellulosic material,a plurality of material supports arranged within said processing zones for receiving cellulosic material cascading within said chamber,said material processing chamber having a first outlet for the discharge of steam generated from processing the cellulosic material within said processing zones, andat least one inlet for recycling at least a portion of said steam into said material processing chamber, whereby said steam at least partially provides an inert atmosphere within said material processing chamber.
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Accused Products
Abstract
An apparatus for torrefaction of water containing cellulosic materials is performed in an inert atmosphere. The cellulosic material is cascaded through the apparatus between a plurality of rotatable trays vertically stacked within multiple processing zones. Steam being generated from heating of the cellulosic material is recycled back to the apparatus to provide an inert atmosphere. The steam may be superheated in a heat exchanger. Exhaust from the torrefaction zone of the apparatus has some moisture and other volatiles removed prior to being reheated in a burner. The heated exhaust is used in the heat exchanger to superheat the recycled steam.
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Citations
7 Claims
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1. An apparatus for the torrefaction of water-containing cellulosic material within an inert atmosphere, said apparatus comprising,
a material processing chamber having a plurality of processing zones adapted for processing water containing cellulosic material, a plurality of material supports arranged within said processing zones for receiving cellulosic material cascading within said chamber, said material processing chamber having a first outlet for the discharge of steam generated from processing the cellulosic material within said processing zones, and at least one inlet for recycling at least a portion of said steam into said material processing chamber, whereby said steam at least partially provides an inert atmosphere within said material processing chamber.
Specification