External pressure-type hollow fiber membrane module with antipollution structure and cleaning system

Abstract

The invention discloses an external pressure-type hollow fiber membrane module with antipollution structure and a system and a method for cleaning, the external pressure-type hollow fiber membrane module comprises a water producing pipe, a raw water pipe, a central water distribution pipe, a central water distribution hole, a U-shaped membrane fiber, a membrane casing, an aeration device, a gas intake pipe, a concentrated water pipe and a pollutant-enriched region, wherein the U-shaped membrane fiber is vertically cast at an upper end of the membrane casing in the shape of hanging naturally, an lower end of a U-shaped membrane module is provided with a gas distribution system, below which the pollutant-enriched region is arranged. The external pressure-type hollow fiber membrane module has the advantages: 1, membrane pollution can be effectively controlled so as to maintain the membrane at higher flux and cleaning can be performed timely during pollution to rapidly recover membrane flux; 2, the possibility of fiber breakage can be reduced due to non-tensioned membrane fiber and adequate shake of aeration; and 3, the V-shaped pollutant-enriched region without any component is arranged below the aeration device, thus no resistance is applied to the lower portion of the membrane fiber during washing and the washing water can speed up the discharging of pollutants.

Description

technical field [0001] The invention relates to an external pressure hollow fiber membrane module with an anti-pollution structure, a cleaning system and a method, and belongs to the field of water treatment system manufacturing. Background technique [0002] Authorized announcement number NC1199717C, title "A type of hollow fiber membrane module with external pressure that can be flushed with air", relates to the structural design and use method of a hollow fiber membrane module. The main technical feature of the present invention is that a special air flushing part is arranged in the middle of the membrane filaments at the bottom of the membrane module; Reasonably standardize the trajectory of gas and water and the flow state of two-phase flow, and at the same time make the membrane module work in the subcritical flux operating area under the selected operating conditions. Its disadvantages: First, due to the unscientific connection between the U-shaped membrane filament ...

AI Technical Summary

Problems solved by technology

Its disadvantages: First, due to the unscientific connection between the U-shaped membrane filament and the membrane shell, the membrane vibration generated during air shock will have a greater impact on the membrane filament at the bonding point, and its absolute lateral movement will cause the filament to break; The second is that when the U-shaped membrane is cast, because the membrane is in a tight state, when the aeration is fully shaken, the probability of breaking the wire is very high

Images