Central baffle, pressurized hollow fiber separation membrane module comprising same, and method for washing same

Abstract

The present invention relates to the structure of a pressurized hollow fiber separation membrane module, and a method for washing the same. In particular, a central baffle of a cylindrical shape having a hollow is installed inside the pressurized hollow fiber separation membrane module, wherein the central baffle comprises: an air zone including, on the outer periphery thereof, at least one back washing hole which is regularly or irregularly formed in a penetrating manner; and a water zone including at least one back washing hole which is regularly or irregularly formed in a penetrating manner. The central baffle is installed in the center of the pressurized hollow fiber separation membrane module on the same axis as a concentration part so as to allow concentrated water and cleaning air to uniformly flow in all directions of a housing and to improve an increase of the pressure and linear velocity or a stagnating phenomenon, or the like, which may occur in the conventional modules, thereby increasing the effect of physical washing and decreasing contamination of the separation membrane.

Description

technical field [0001] The present invention relates to a structure of a pressure-type hollow fiber membrane module and a cleaning method thereof, more specifically, to a cylindrical central baffle, which has a hollow part in the membrane module, including an air zone, and At least one backwash hole passing therethrough in an orderly or disorderly manner on the periphery, and a water zone having at least one backwash hole passing therethrough in an orderly or disorderly manner on the periphery of the water region, and a pressure-type hollow Fiber membrane module, wherein the central baffle is installed on the same axis at the center of the pressure type module as the concentration part, so that the concentrated water and clean air flow uniformly in all directions of the housing and prevent A phenomenon in which pressure and line speed increase or remain stagnant, which occurs in conventional modules, improves mechanical cleaning and reduces membrane fouling. In addition, the ...

AI Technical Summary

Problems solved by technology

[0009] However, according to the related art, the membrane module with the baffle structure is only designed for the even distribution of the influent water or firmly fixing the isolation membrane or preventing the formation of pollutants, and there are technical limitations in solving the following problems: In the hollow fiber During the operation of the module, the hollow fiber membrane tends to be in one direction, and the internal pressure and line speed are uneven, and when the backwashing process and the air flushing process are performed under the condition that the membrane module is polluted, the pressure applied to the hollow fiber membrane The pressure or pressure around the concentrating part increases, and as a result, the membrane is cut or stretched and bottlenecking (congestion) of the concentrated water occurs

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