Integrity detecting device for hollow fiber membrane component

Abstract

The invention discloses an integrity detecting device for a hollow fiber membrane component. The integrity detecting device comprises a reactor, an aerating device and a water pump, wherein two pairs of platinum wire probes are arranged on a water feeding pipe connected with the water pump, and two circuits are connected onto a 5V power supply in parallel; each pair of platinum wire probes and one fixed resistor are connected onto the circuits in series, each resistor is also connected with a fixed capacitor in parallel, the two ends of each fixed resistor are connected with an acquisition card by guide lines, the acquisition cards acquire voltages at the two ends of the fixed resistors, are connected with a computer by data lines and judge the integrity of the hollow fiber membrane component according to the change of on-line-displayed voltages. The integrity detecting device disclosed by the invention has the advantages that according to the electric principle, the change of the voltages of the two ends of the fixed resistors is acquired by utilizing the data acquisition devices, and the integrity of the membrane component is judged according to the change rule of voltage signals; continuous on-line detection can be realized, not only is the sensitivity relatively high and is the operation stable, but also the economy is relatively good.

Description

technical field [0001] The invention belongs to the technical field of membrane filtration treatment, and relates to a detection technology device utilizing electrical principles. Background technique [0002] Ultrafiltration membrane modules are increasingly used in water treatment. This technology can not only remove colloidal particles in water well, but also effectively shield pathogenic microorganisms in water. However, once the hollow fiber membrane module is damaged during operation, the consequences will be very serious, especially in the treatment of drinking water, which can not only lead to acute and chronic poisoning, but also may lead to the occurrence of epidemic diseases. Therefore, how to timely and effectively detect the damage of the membrane and ensure the integrity of the membrane is particularly important for drinking water safety and sewage discharge standards. [0003] Since the birth of membrane water treatment, it has been accompanied by the researc...

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Problems solved by technology

[0003] Since the birth of membrane water treatment, it has been accompanied by the research of membrane integrity detection methods. At present, the membrane integrity detection methods mainly include direct and indirect integrity detection methods. Due to the cumbersome steps of the direct detection method, it is not easy to implement in operation, and it is difficult to Online detection, so indirect detection is widely adopted by professionals and recommended by domestic and foreign authoritative organizations in practical applications

[0004] Indirect detection refers to reflecting the integrity of the membrane by detecting the water quality of the filtered water, mainly including turbidity detection and particle counting method, etc. The turbidity mainly depends on the wavelength of light and particle size, shape and composition, and cannot reflect small changes in water quality , and is easily affected by air bubbles in water; the particle counting detection method is not suitable for dead-end filtration, because the air bubbles formed during backwashing can easily affect the detection results

In addition, Wang Songlin, a scholar at Huazhong University of Science and Technology, used magnetic nanoparticles as markers to determine the integrity of each membrane module by measuring the magnetic susceptibility of the permeate of the ultrafiltration membrane module; Korean scholar Soo Hoon Choi used fluorescent particles as markers. Through fluorescence image analysis, the quality of effluent particles can be estimated, and the integrity of membrane modules can be judged. All the above methods have certain limitations in practical application. The development of fast, accurate, sensitive, continuous and simple online detection methods for membrane integrity is currently It has become one of the focal issues in the precise application of ultrafiltration membrane technology

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