公开(公告)号：US5647988A

公开(公告)日：1997-07-15

申请号：US349014

申请日：1994-12-02

申请人： Toshio Kawanishi ,  Shigeki Yokoyama ,  Katsuro Ishihara ,  Yoshihisa Narukami ,  Masahiko Shioyama ,  Mikiharu Tokushima ,  Toshiya Ozaki

发明人： Toshio Kawanishi ,  Shigeki Yokoyama ,  Katsuro Ishihara ,  Yoshihisa Narukami ,  Masahiko Shioyama ,  Mikiharu Tokushima ,  Toshiya Ozaki

IPC分类号： B01D29/11 ,  B01D65/02 ,  B01D65/06

CPC分类号： B01D65/02 ,  B01D29/114 ,  B01D2201/085 ,  B01D2321/04 ,  B01D2321/162 ,  B01D2321/164 ,  B01D2321/168

摘要： A method for back-washing a submerged-type ceramic membrane separation apparatus is provided in which filtrate once removed from the apparatus and a chemical agent are forcibly supplied to filtrate passages in ceramic membrane filters to wash the ceramic membrane filters with the filtrate and with the chemical agent, wherein the water washing and chemical washing are carried out at a predetermined frequency ratio and for a predetermined time period, or wherein the frequency and time period of the chemical washing are determined on the basis of a transmembrane pressure difference, suction pressure or filtrate flux observed during a filtering operation performed by the membrane separation apparatus. This method makes it possible to avoid an excessive chemical washing, and to reduce the amounts of water and chemical agent and the time required for the chemical washing.

摘要翻译： 本发明提供一种后置式浸没式陶瓷膜分离装置的方法，其中一次从设备中取出的滤液和一种化学试剂被强制供给到陶瓷膜过滤器中的滤液通道，以滤液和 化学试剂，其中水洗和化学洗涤以预定的频率比进行预定的时间，或者其中化学洗涤的频率和时间周期是基于跨膜压力差，吸入压力或 在膜分离装置进行的过滤操作中观察到的滤液通量。 该方法可以避免过度的化学洗涤，并减少水和化学剂的量以及化学洗涤所需的时间。