Patent ID: 8821726
Filing Date: 2014-09-02
Classification: B01D,C02F,Y02W

Abstract:
1. A submerged membrane separator comprising: a casing opened at a top; a plurality of flat membrane cartridges arrayed at intervals in the casing; and an air diffuser provided below the membrane cartridges, wherein the membrane cartridges are arrayed without contacting adjacent membrane cartridges, the membrane cartridges are movably held in an up-down direction in the casing while having a space in the up-down direction between an upper end of the membrane cartridge and the casing, a lifting suppressing member for restricting a lifting amount of the membrane cartridges to be smaller than the space in the up-down direction is provided in the casing, the membrane cartridges are supported by the lifting suppressing member and can be lifted individually by an upward flow generated by diffused air from the air diffuser, the lifting amount of the membrane cartridges is restricted by the lifting suppressing member to be larger than zero and smaller than the space in the up-down direction, and when the air diffusion by the air diffuser is stopped, the weight of the lifted membrane cartridges causes the membrane cartridges to move downward such that the space in the up-down direction is formed between the upper end of the membrane cartridge and the casing.