| 摘要 |
<p>Liqs. are purified by using a membrane pack through which filtrate permeates but which holds back the sepd. material. The membrane elements consist of two porous filter leaves placed either side of a spacer, with membranes on their surface. To form an easily handled pack, the spacer in the middle should be of a more rigid material than the filter material. This spacer has a series of radial channels to encourage liq. flow. Each of the filter leaves has a large number of areas impregnated with an adhesive. This bonds together the support in the middle with two membranes either side. The device is usedin centrifugal type membrane separators for purifying liqs. It provides a thin membrane pack which is economic to produce and reliable to operate in a high speed rotating sep. purifier. It overcomes the problems encountered in sealing a number of such units together to form a pack.</p> |
