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发明公开
CN1117270A 过滤方法 失效 - 权利终止 转让 许可

过滤方法
摘要：
对浆料进行过滤和洗涤处理，以分离母液和固体。过滤洗涤过程在壳室(101)中进行。壳室中封闭有惰性气体气氛，气氛也穿过滤饼并可被循环，经处理后，可除去污染物。为避免滤饼因在壳室(101)内存在夹带污染物蒸汽的气体而被再污染，气体在滤饼在可移动过滤介质(100)上运动方向的下游位置(152a，166)处引入壳室(101)中，这样建立污染物浓度梯度，由此最纯净的滤饼与污染物含量最低的气体接触。
摘要（英）：

PCT No. PCT/GB94/00132 Sec. 371 Date Jul. 20, 1995 Sec. 102(e) Date Jul. 20, 1995 PCT Filed Jan. 24, 1994 PCT Pub. No. WO94/17892 PCT Pub. Date Aug. 18, 1994A slurry is subjected to a filtration and washing process in order to separate the liquor from the solids. The filtration and washing process is carried out in a housing (101) enclosing an inert gaseous atmosphere which also passes through the filter cake and may be recycled, after treatment, to remove contaminants therefrom. To prevent recontamination of the filter cake as a result of the recycled gas entraining contaminant vapors within the housing (101), the gas is introduced into the housing (101) at a downstream location (152a, 166) relative to the direction of travel of the filter cake on a movable filter medium (100) and in such a way as to develop a contaminant concentration gradient whereby the cleanest cake is contacted by gas having the lowest contaminant level.

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