Diffusion element with boundary zone treatment
    15.
    发明授权
    Diffusion element with boundary zone treatment 失效
    具有边界区处理的扩散元件

    公开(公告)号:US4261932A

    公开(公告)日:1981-04-14

    申请号:US952862

    申请日:1978-10-19

    Abstract: Gas diffusion elements, formed of a body of solid particles which have been shaped, pressed and rendered coherent by bonding or sintering in a compacted form having pores, and having an enhanced apparent volumetric compression ratio in a central zone and in a boundary zone thereof, are disclosed. Such elements have a generally horizontal portion including an upper gas discharge surface having a bubble release pressure in water, by a test disclosed herein, in the range of about 2 to about 20 inches of water. Among the preferred embodiments is an element whose gas discharge surface has the property that its coefficient of variation is not greater than about 0.25, based on the values of bubble release pressure at a plurality of points over said surface. Such elements may provide improved gas, e.g. oxygen, transfer efficiency, and therefore hold promise of improving the efficiency and economics of gas transfer processes, such as for instance treatment of sewage or other wastewater with air, oxygen and/or ozone.

    Abstract translation: 由固体颗粒体形成的气体扩散元件,其通过以具有孔的压实形式的结合或烧结而成形,压制并变得相干,并且在中心区域及其边界区域具有增强的表观体积压缩比, 被披露。 这种元件具有大致水平的部分,包括在水中具有气泡释放压力的上部气体排出表面,通过本文公开的测试,在约2至约20英寸水的范围内。 在优选实施方案中,基于在所述表面上的多个点处的气泡释放压力的值,其气体排放表面具有其变异系数不大于约0.25的性质。 这样的元件可以提供改进的气体,例如 氧气,转移效率,因此有希望提高气体转移过程的效率和经济性,例如用空气,氧气和/或臭氧处理污水或其他废水。

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