| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separation membrane element capable of maintaining stable separation performance over a long term by preventing a deposit of turbid matter or the like from being unevenly distributed to the upstream side. <P>SOLUTION: The separation membrane element comprises: a separation membrane (1); and a fluid collection pipe (10) which is disposed in parallel with the flow direction (FD) of supply fluid to be supplied to the separation membrane (1) and causes permeation fluid of permeating the separation membrane (1) to flow thereinto, wherein, on the fluid collection pipe (10), pore parts (10a) which communicate the outside of the pipe with the inside of the pipe and serve as flow-in ports of the permeation fluid are disposed, and the proportion of opening surfaces of the pore parts (10a) to the outer circumferential surface of the fluid collection pipe (10) increases toward the downstream side from the upstream side of the flow direction (FD) of the supply fluid. <P>COPYRIGHT: (C)2011,JPO&INPIT |
