Evaluation device and evaluation method for flattening resistance of hollow fiber membrane filaments

Abstract

The invention provides an evaluation device and evaluation method for flattening resistance of hollow fiber membrane filaments. The evaluation device comprises end sockets, end covers, a cylinder, a sealing head and a pressure sensor, the end covers are fixedly installed at the two ends of the cylinder, the end sockets are fixedly installed at the ends, away from the cylinder, of the end covers, and a plurality of through holes are formed in the end covers in an array mode; the through holes are communicated with the seal heads and the cylinder body, the sealing heads are embedded into the through holes, water outlet holes are formed in the sealing heads in the length direction, the two ends of a hollow fiber membrane filament to be detected are embedded into the water outlet holes of the sealing heads located at the two ends of the cylinder body respectively, a water inlet is formed in the cylinder body, a water outlet is formed in one seal head, the pressure sensor is installed in the sealing head water outlet hole in the sealing head provided with the water outlet, the sealing head end provided with the pressure sensor is located on the outer side of the water outlet, the evaluation method adopts a step-by-step pressurization mode to conduct pressure detection evaluation, and therefore manual evaluation is replaced, and the evaluation accuracy and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of hollow fiber membrane performance detection, in particular to a hollow fiber membrane anti-crush performance evaluation device and evaluation method. Background technique [0002] Hollow fiber ultrafiltration membranes and microfiltration membranes have been widely used in various water treatment fields. According to the operation mode, they are divided into internal pressure operation and external pressure operation. At present, the degree of localization of hollow fiber ultrafiltration membranes and microfiltration membranes is very high, but the quality of the products is also uneven. Relevant departments have issued a series of industry standards and national standards, which provide technical support for standardizing the development of the industry and ensuring product quality. However, unfortunately, there are no requirements and evaluation methods for the flattening resistance of hollow fiber memb...

AI Technical Summary

Problems solved by technology

At present, the degree of localization of hollow fiber ultrafiltration membranes and microfiltration membranes is very high, but the quality of the products is also uneven. Relevant departments have issued a series of industry standards and national standards, providing technical support for standardizing the development of the industry and ensuring product quality. However, unfortunately, there are no requirements and evaluation methods for the flattening resistance of hollow fiber membranes in the existing standards

[0003] However, in the actual operation of the membrane module, the flattening resistance of the hollow fiber membrane is a very important parameter, which is directly related to the water yield, the quality of the effluent and the service life of the membrane module. The structural strength of the hollow fiber membrane is determined by Its own material and microstructure determine that under the action of water pressure, the membrane filaments may be deformed due to pressure, and the cylindrical cavity is compressed after the cavity is compressed, which in turn leads to a decline in the water treatment capacity of the membrane filaments, some serious It may even directly cause the rupture of the membrane filaments, resulting in the failure of the normal use of the membrane module

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