Laminated hollow fiber membrane element with equal membrane wire spacing and production method thereof

Abstract

The invention provides a laminated hollow fiber membrane element with equal membrane wire spacing. The laminated hollow fiber membrane element comprises a pair of diaphragm boxes (4) and a laminated diaphragm (1), each layer of single membrane of the laminated membrane (1) comprises an equidistant membrane filament arrangement body and elastic bodies arranged at the two ends of the equidistant membrane filament arrangement body in the length direction. The elastic bodies comprise the first elastic body (2) and the second elastic body (3), the first elastic body (2) is located at the near end of the second elastic body (3), and the covering width L4 of the second elastic body (3) in the length direction of the equidistant membrane filament arrangement body is larger than the covering widthL3 of the first elastic body (2) in the length direction of the equidistant membrane filament arrangement body. When the laminated diaphragm (1) is arranged in the diaphragm boxes (4), the first elastic body (2) is at least partially exposed outside the diaphragm boxes (4). According to the membrane element, the cross phenomenon among the membrane filaments is reduced so that mud accumulation andhair accumulation are effectively slowed down, the stability of the running flux of the membrane element is improved and the root damage condition of the membrane filaments is reduced.

Description

【Technical field】 [0001] The invention relates to a hollow fiber membrane element, especially a laminated hollow fiber membrane element with equal membrane filament spacing, and also relates to a production method of the membrane element. 【Background technique】 [0002] Membrane separation technology is the most promising clean treatment process for the water pollution treatment industry today, and it is the most promising and fastest-growing water treatment process. The curtain membrane is the most widely used in the MBR process. In the actual operation of the curtain membrane, due to factors such as serious crossing between the membrane filaments and uneven jitter control, the membrane jitter effect is poor and other factors often lead to hair, fibers, and dirt at the root of the membrane element. The accumulation of mud, etc., as well as the long-term friction of aeration and vibration lead to serious damage to the membrane layer of the root membrane, which makes more tha...

AI Technical Summary

Problems solved by technology

[0008] In addition, the present invention expects to overcome the capillary action between the potting resin and the membrane filaments caused by factors such as the small and uneven gap between the membrane filaments and the crossing of the membrane filaments in the production process of the curtain membrane through the improvement of the membrane element structure, thereby making the potting The rubber climbs upward along the membrane filament, so as to avoid the decrease of the usable area of ​​the membrane filament caused by the glue climbing phenomenon, and avoid the problem of stress concentration at the junction of the membrane filament and the climbing glue, which will cause damage to the root of the membrane filament, thereby prolonging the service life of the membrane

Images