Automatic on line detecting device of hollow fiber separating membrane

Abstract

The invention relates to an automatic on-line detection device for hollow fiber separation membranes used for sewage treatment and reuse in various fields. The pressure sensor used for detection is fixed above the separation membrane module and connected with a PLC programmable controller by wires to separate There is an air inlet and an air inlet valve next to the water outlet on the top of the membrane module, and the air with a certain pressure is injected into the separation membrane until the water in the separation membrane is drained, and the sensor is used to transmit the signal to the PLC controller. The pressure difference obtained by subtracting the pressure measured at different times can detect the integrity of the separation membrane in time. When the pressure difference is less than 1kPa ~ 5kPa, it means that a small part of the separation membrane is damaged, but within the allowable range, when the pressure difference is greater than When the pressure exceeds 5kPa, the separation membrane module should be replaced immediately. The advantages are timely, accurate and reliable detection, reduced labor intensity, high efficiency and low cost.

Description

Technical field: [0001] The invention belongs to a detection device for filtration in various fields of sewage treatment and reuse, in particular to an automatic online detection device for a hollow fiber separation membrane. Background technique: [0002] With the increasing shortage of water resources, sewage treatment and reuse technology is being vigorously developed, and hollow fiber separation membranes are being widely used in the water treatment industry. Usually, a separation membrane module contains thousands to tens of thousands of membranes, each membrane The quality of the separation membrane module will directly affect the filtration effect and filtration quality. Currently, a water quality detector is installed on the separation membrane module, or a sampling port is left on the separation membrane module, and the instrument or sampling is used for manual detection. When the water quality does not meet the specified requirements, that is, the water quality is ...

AI Technical Summary

Problems solved by technology

[0002] With the increasing shortage of water resources, sewage treatment and reuse technology is being vigorously developed, and hollow fiber separation membranes are being widely used in the water treatment industry. Usually, a separation membrane module contains thousands to tens of thousands of membranes, each membrane The quality of the separation membrane module will directly affect the filtration effect and filtration quality. Currently, a water quality detector is installed on the separation membrane module, or a sampling port is left on the separation membrane module, and the instrument or sampling is used for manual detection. When the water quality does not meet the specified requirements, that is, the water quality is poor, it means that the separation membrane is broken. Because the detection is manually controlled and the timing cannot be guaranteed, it is extremely inaccurate. At the same time, it is also limited by the accuracy and quality of the instrument. High labor intensity, seriously affecting the water quality after treatment, and short service life of the separation membrane

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