| 摘要 |
<p>The objective of the present invention is to provide a reduced-height water-treatment membrane module unit having increased membrane surface area capable of being compactly installed. Inside an outer cylinder are accommodated a water-collecting tube and a plurality of envelope-shaped membranes wrapped around the outer periphery of the water-collecting tube. A plurality of spiral membrane modules (2) constituting a flow channel for raw water are arranged in parallel between adjacent envelope-shaped membranes. The parallel spiral membrane modules (2) are arranged as a set. Two sets (2A, 2B) of the spiral membrane modules (2) are provided. A manifold connected to the entry side or the exit side of the raw-water flow channel at one end side of the spiral membrane modules (2) of each set (2A, 2B) is a common manifold (4) common to the sets. The spiral membrane modules (2) of the sets (2A, 2B) are connected on the surface opposing the common manifold (4), and a manifold (3, 3) specific to each of the sets is connected to the other end side of the spiral membrane module (2) of the sets (2A, 2B).</p> |
