n2 driven tangential flow ultrafiltration device

Abstract

The invention discloses a N2-driven tangential flow ultrafiltration device, which comprises a nitrogen pressure bottle, a second original barrel and a first original barrel, the top of the nitrogen pressure bottle is fixedly installed with a gas outlet main pipe, and the front side of the gas outlet main pipe is A pressure reducing valve is fixedly installed. The N2-driven tangential flow ultrafiltration device can realize full nitrogen protection when enriching trace colloids in large volumes of water, thereby isolating the atmosphere and maintaining an inert atmosphere, so that the colloids and other easily oxidizable components in the water are not easy to change their properties or forms. This makes the analysis of colloids and other components after enrichment more accurate. At the same time, all structures in contact with the sample are lined with polytetrafluoroethylene to reduce the adsorption loss of colloids on the tube wall, and the first original barrel and the second The shape of the inner barrel of the original barrel is conical, which can make the residual stock solution less, thereby preventing the adsorption loss of colloids and easily adsorbed elements on the pipe wall and device wall.

Description

technical field [0001] The invention relates to the field of environmental science, in particular to an N2 driven tangential flow ultrafiltration device. Background technique [0002] The presence of trace colloids plays a non-negligible role in the migration of radionuclides. Under normal circumstances, only by separating and enriching microcolloids to a certain concentration can the above-mentioned related research work be carried out smoothly. The properties of colloids are extremely unstable, and conventional techniques such as filtration and precipitation are difficult to achieve the enrichment of trace colloids. At present, tangential flow ultrafiltration related technologies have been developed in the world, which can realize the separation and enrichment of microcolloids under tangential flow fields, and avoid the clogging of filter membranes and the perforation under high pressure. However, the current tangential flow ultrafiltration technology has disadvantages s...

AI Technical Summary

Problems solved by technology

However, the current tangential flow ultrafiltration technology has disadvantages such as not being portable, colloids are easy to contact with air and denatured, and cannot meet the requirements of stable and efficient enrichment of trace colloids in field sites

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