Rotary heating apparatus for puffing borax

专利名称：Rotary heating apparatus for puffing borax发明人：Godfrey B. D'Souza申请号：US05/621114申请日：19751009公开号：US040313A公开日：19770621

摘要：A rotary inclined tubular drier for puffing or expanding borax and a process forthe production of puffed or expanded borax beads of desired physical characteristics. Arotatable tube is mounted on bearing wheels and surrounded by a fixed, close-fitting,insulated tube having electrical heating elements running lengthwise attached to itsinside wall. The rotatable tube is fed continuously with granular borax feedstock by avibratory feeder from its higher end and the puffed borax is discharged into a dischargechute from the lower end of the tube. A counter current of dry air is maintained by asuction hood at the high end of the tube, and borax is prevented from adhering to theinterior of the tube by an adjustable, spring-loaded, internal scraper. The temperature ofthe drier is controlled by means of a pyrometer incorporated into a scraper support rodon the interior of the tube. Puffed borax beads of particularly desirable characteristicsfor detergent use are produced from sodium tetraborate pentahydrate by heating thedrier to 220°-450° F and adjusting the angle of incline and rate of rotation so as toprovide a 45-90 second residence time in the drier for the borax.

申请人：CANADA PACKERS LIMITED

代理机构：Bacon & Thomas

更多信息请下载全文后查看