| 摘要 |
PCT No. PCT/JP83/00423 Sec. 371 Date Jul. 20, 1984 Sec. 102(e) Date Jul. 20, 1984 PCT Filed Nov. 30, 1983 PCT Pub. No. WO84/02085 PCT Pub. Date Jun. 7, 1984.A tubular module employed for the separation, purification, concentration, etc., of a solution has a plurality of porous support tubes each containing semipermeable membranes which are arranged parallel in a plurality of stages, and which are fixed at both ends thereof by heads containing return bends so as to connect the porous support tubes into zigzags, and are also tightly fastened together by the centers of the heads by means of a single stay bolt. This tubular membrane module is characterized in that the end of the stay bolt does not extend through the head which is remote from the bolt, but ends within that head, and the return bends within the center of the head are bored so as to be further out than the end of the stay bolt to provide communication between the central tubes, so that the solution in the porous support tubes can be easily removed with no partial vacuum generated therein. |
