Full-automatic microfiltration membrane aperture distribution tester as well as automatic measuring method and application thereof

Abstract

The invention discloses a full-automatic microfiltration membrane aperture distribution tester as well as an automatic measuring method and application thereof. The full-automatic microfiltration membrane aperture distribution tester comprises a gas supply cylinder, a gas buffer tank and a test membrane cell for fixing and sealing a microfiltration membrane, wherein the gas supply cylinder, the gas accumulator tank and the test membrane cell are successively connected via a pipeline. The full-automatic microfiltration membrane aperture distribution tester is characterized in that a motor-driven flow regulating valve is arranged between the gas supply cylinder and the gas buffer tank; the gas buffer tank is provided with a pressure probe; an outlet on the microfiltration membrane penetration side of the test membrane cell is provided with a gas flow probe; the signal output end of the pressure probe and the signal output end of the gas flow probe are connected with a data acquisition module for collecting pressure and flow signals in real time; the signals are transmitted by the communication module and a computer controller; the signal output end of the computer controller is connected with the signal input end of the motor-driven flow regulating valve; and the motor-driven flow regulating valve is under real-time feedback control. According to the full-automatic microfiltration membrane aperture distribution tester, the measuring condition can be automatically controlled in real time, measuring data is collected, data is processed in real time, and the assessment requirement on the performance of various sieve-pore filtration membranes can be satisfied.

Description

technical field [0001] The invention relates to a membrane pore size measuring instrument, in particular to an automatic microfiltration membrane pore size distribution measuring instrument and its automatic measuring method and application. Background technique [0002] The filtration pore size of the microfiltration membrane is generally 0.01-10 microns. It is an important type of sieve selective filtration membrane. It has the advantages of large flux and low pressure requirement on the upstream side. It is widely used in chemical industry, medicine, food, water treatment, environmental protection, It is widely used in the electronics industry and other industries. Its separation performance is mainly affected by the pore characteristic parameters of the membrane, such as the average pore size and pore size distribution. The pore size distribution of the membrane is narrow, and there are many through holes in the membrane within the narrow pore size range, and the flux is...

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Problems solved by technology

[0003] The Chinese Utility Model Patent Membrane Pore Size Tester (application number 01273986.3, authorized announcement number CN 2508242Y) discloses a membrane pore size tester based on the bubble point-flow rate method to measure the membrane pore size, including sequentially connected gas supply cylinders, pressure balance The tank, test tank and flowmeter have the advantages of simple structure and convenient use, but the membrane pore size analyzer needs to manually control the measurement conditions, and at the same time need to manually collect measurement data such as pressure and flow for the calculation of parameters such as average pore size, and there are errors Large, inconvenient operation and other disadvantages

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