Experiment system and method for tangential filtration of high pressure resistant flat reverse osmosis (RO) membrane

Abstract

The invention discloses an experiment system and an experiment method for tangential filtration of a high pressure resistant flat reverse osmosis (RO) membrane. The experiment system comprises a material feeding pot, a pressure pump, a flat RO membrane filtration device, a storage pot, a pressure gauge, an adjustment valve and a safety valve. The experiment method comprises the following steps of: (1) arranging an RO membrane between a top plate and a base plate, and fastening the top plate and the base plate together through bolts; (2) connecting equipment; (3) keeping the safety valve closed and the adjustment valve opened, and starting the high-pressure pump; (4) gradually turning down the opening degree of the adjustment valve, so that the liquid feeding pressure of the flat RO membrane filtration device is raised until material liquid flowing through the membrane flows out; and (5) finishing collecting the filtered material liquid, stopping the pump, and opening the adjustment valve and the safety valve to release pressure. The experiment system is feasible in a laboratory and can bear high pressure required by tangential filtration of the flat RO membrane so as to finish an RO filtration experiment; and according to the experiment method, the pollution situation of the membrane in each filtration stage can be observed conveniently, and researches on a pollution control technology is facilitated.

Description

technical field [0001] The present invention relates to a flat plate RO membrane filtration experimental device, in particular to an experimental system for high pressure resistant flat RO membrane tangential filtration, which is a feasible flat plate reverse osmosis (RO) membrane filtration system in the laboratory, and a Experimental method for performing reverse osmosis tangential filter media at high pressure. Background technique [0002] At present, most of the known RO membrane filtration devices use roll-type membrane modules. The roll-shaped RO membrane is selected and inserted into a cylindrical high-pressure resistant filter housing to form a roll-type membrane module. Because the coiled membrane module is sealed in the filter housing, it can only complete the separation and filtration of the medium, which is not conducive to studying and observing the membrane surface at any time to control the occurrence of membrane fouling. The membrane can only be taken out f...

AI Technical Summary

Problems solved by technology

First of all, the dead-end filtration technology has been eliminated by the application of engineering examples, and now tangential filtration is generally used to slow down the concentration polarization. If the dead-end filtration is used for scientific research, it does not conform to the actual situation; secondly, the existing flat-plate type Ultrafiltration and microfiltration filters are generally made of plastic, which can only be tested under low pressure (maximum 0.5Mpa), while reverse osmosis membrane filtration requires at least 1-2Mpa pressure conditions, such products are obviously under pressure lack of ability

[0004] In addition, the existing flat filter cannot freely change and adjust the filtration speed according to the pressure intensity, which brings a lot of inconvenience to the experiment and also affects the accuracy of the experiment

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