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A Device for Accurately Measuring Microflux of a Filter Membrane

An accurate measurement and membrane technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of inability to accurately measure small fluxes, and achieve the effect of simple structure, reliable results and accurate measurement.

Inactive Publication Date: 2017-01-11
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device for accurately measuring the tiny flux of the filter membrane, thereby solving the defect that the prior art cannot accurately measure the tiny flux

Method used

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  • A Device for Accurately Measuring Microflux of a Filter Membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After completing the above preparatory work, record the liquid level height in the capillary 6 at this time, then turn on the air pump, apply a working pressure not greater than one standard atmospheric pressure on the top of the capillary 6, after a certain period of time, record the liquid level in the capillary 6 at this time The difference between the height of the liquid level and the two is the flux of the filter membrane 3 during this period, and then divided by the working time to obtain the flux of the filter membrane 3 per unit time.

Embodiment 2

[0032] This embodiment is roughly the same as the working embodiment 1, except that the flux of the filter membrane 3 per unit time under different working pressures can be calculated by adjusting the pressure through the regulating valve as required.

Embodiment 3

[0034] After completing the above preparatory work, there is no need to record the height of the liquid level in the capillary 6 at this time, as long as it is ensured that the height of the liquid level is above the two photoelectric sensors, then the air pump is turned on, and no more than a standard pressure is applied to the top of the capillary 6. Atmospheric working pressure, when the liquid level in the capillary 6 successively flows through the positions where the two photoelectric sensors are located, the photoelectric sensors record the current time and calculate the time difference. Since the position of the sensor is relatively fixed, the flux of the filter membrane 3 is constant, and then divided by the time difference to obtain the flux of the filter membrane 3 per unit time.

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Abstract

The invention provides a device for accurately measuring micro flux of a filter membrane. The device comprises an upper cup body and a lower cup body which are mutually fastened and provide a closed inner cavity, wherein a filter membrane which horizontally extends is sandwiched between the upper cup body and the lower cup body; a liquid inlet is formed in the upper cup body; and a liquid outlet is formed in the lower cup body. The device also comprises a capillary tube which is connected with the top of the upper cup body and vertically extends at a part above the top, wherein a pipeline of the capillary tube is communicated with the space between the upper cup body and the filter membrane. The capillary tube with scales is connected to the upper cup body of an ultrafiltration cup, and micro volume change of to-be-tested liquid before and after filtering can be directly read, so that the micro flux of the filter membrane is accurately measured, the influence of volatilization of the filtered solution on the measurement result in the test process in the prior art is eliminated, data are reliable, the whole device is simple in structure, accurate to measure, reliable in result and high in operability, and research and development of the micro-flux filter membrane can be promoted.

Description

technical field [0001] The invention relates to the field of accurate measurement of the flux of a filter membrane, in particular to a device for accurately measuring the tiny flux of a filter membrane. Background technique [0002] Membrane separation technology has been widely used in food, medicine, biology, chemical industry, energy, processing, electronics, etc. It has produced huge economic and social benefits, and has become one of the most important means in today's separation science. The flux of the filter membrane is an important index to evaluate the performance of the filter membrane. It can effectively reflect the processing capacity of the filter membrane per unit time, so it must be accurately measured during the development and use of the filter membrane. With the development of membrane technology, the pores in the filter membrane are getting smaller and smaller, which can effectively separate the suspended particles, macromolecules and ions in the solutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/10
Inventor 杨海军侯铮迟胡钧
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI