公开(公告)号：US5946818A

公开(公告)日：1999-09-07

申请号：US652578

申请日：1996-09-23

申请人： Hamish Baxter ,  Andrew Nicolson Carruthers ,  Hans-Peter Elkjaer ,  Bryan Hiscox ,  Jens Fenger ,  Benny E. Raahauge ,  Jose Gil Fernandez Pulpeiro

发明人： Hamish Baxter ,  Andrew Nicolson Carruthers ,  Hans-Peter Elkjaer ,  Bryan Hiscox ,  Jens Fenger ,  Benny E. Raahauge ,  Jose Gil Fernandez Pulpeiro

IPC分类号： F26B3/12 ,  F26B17/10 ,  F26B7/00

CPC分类号： F26B3/12 ,  F26B17/102

摘要： A method and apparatus are disclosed for continuously drying, preferably with agglomeration and/or coating and sizing, and separating a solid product from a liquid feed material, especially bauxite slurry which passes through a very sticky phase during drying, without significant encrustation of the equipment used. The method comprises: spraying a liquid bearing solid material upwardly into a drying zone, feeding a drying gas into the drying zone from below The spraying liquid in substantially parallel flow, removing the mixture of the drying gas and entrained dried particles from the drying zone, separating the entrained dried particles from their mixture with the drying gas, returning the separated dried particles to the drying zone, and collecting the dried particles, characterized by arranging for the formation of a slower moving boundary layer within the feeding of the drying gas, through which boundary layer dried particles are allowed lo fall under gravity to be collected, and by collecting the dried particles continuously from below the spraying liquid.

摘要翻译： PCT No.PCT / GB94 / 02594 Sec。 371日期1996年9月23日 102（e）1996年9月23日PCT PCT 1994年11月25日PCT公布。 WO95 / 15470 PCT出版物 日期：1995年6月8日公开了用于连续干燥，优选具有附聚和/或涂层和施胶的方法和装置，并且将固体产物与液体进料材料，特别是在干燥期间通过非常粘相的铝土矿浆料分离，没有 所用设备的重大结算。 该方法包括：将液体承载的固体材料向上喷入干燥区，从下面将干燥气体从喷射液体基本上平行流入，从干燥区除去干燥气体和夹带的干燥颗粒的混合物， 将干燥后的干燥颗粒与干燥气体分离，将分离出的干燥颗粒返回到干燥区域，并收集干燥的颗粒，其特征在于，在干燥气体供给期间设置形成较慢的活动边界层，通过 允许边界层干燥的颗粒在重力作用下被收集，并通过从喷射液体的下方连续收集干燥的颗粒。

公开(公告)号：US06217622B1

公开(公告)日：2001-04-17

申请号：US09178022

申请日：1998-10-22

申请人： Bryan Hiscox

发明人： Bryan Hiscox

IPC分类号： B01D900

CPC分类号： C01F7/144

摘要： A method of forming and classifying a precipitate containing large, coarse and fine particles from a super-saturated precipitating mother slurry, e.g. sodium aluminate from the Bayer process. The method comprises separating the precipitating mother slurry into a plurality of separate streams, introducing each stream into a vessel provided with an agitated lower zone and a quiescent upper zone to form the precipitate, with the large and coarse particles remaining as a slurry in the agitated lower zone and the fine particles migrating to the quiescent zone, removing product slurry from the lower agitated zone, and removing spent liquor containing the fine particles from the quiescent upper zone. The invention also provides apparatus for carrying out the method. The combined precipitation and partial classification (separation of fine particles) makes it possible to deal with high solids charges increasingly encountered in industrial processes.

摘要翻译： 一种从超饱和沉淀母液中形成和分级含有大，粗和细颗粒的沉淀物的方法， 来自拜耳法的铝酸钠。 该方法包括将沉淀的母液分离成多个分开的流，将每个流引入设有搅拌的下部区域和静止的上部区域的容器中以形成沉淀物，其中大颗粒和粗颗粒作为搅拌的浆液中的浆料 下部区域和移动到静止区的细颗粒，从下部搅拌区域除去产物浆料，并从静止上部区域除去含有细颗粒的废液。 本发明还提供了用于执行该方法的装置。 组合沉淀和部分分级（细颗粒分离）使得可以处理工业过程中越来越多遇到的高固体含量。