Hollow fiber nanofiltration membrane subassembly

Abstract

The invention belongs to the technical field of membrane subassembly, and more specifically relates to a hollow fiber nanofiltration membrane subassembly. The hollow fiber nanofiltration membrane subassembly comprises a membrane shell, a membrane filament unit which is arranged in gas liquid channels and is used for filtering, guide plates used for separating the gas liquid channel, and fixed layers which are arranged on the two ends of the membrane shell via resin casting; the guide plates are provided with guide holes used for passing of gas and liquid; the upper side and the lower side of the membrane shell are provided with a gas liquid inlet and a gas liquid outlet respectively; the left end and the right end of the hollow fiber nanofiltration membrane subassembly are provided with gas liquid discharging openings. According to the hollow fiber nanofiltration membrane subassembly, the guide plates are arranged in the membrane shell so as to divide the membrane shell into a plurality of gas liquid channels, so that flow body sectional area is reduced at a certain flow amount, flow body flow speed on the surface of a filter membrane element is increased, the concentration of a medium to be filtered on the micro surface of the filter element is reduced greatly, and filtering speed and efficiency are increased greatly.

Description

technical field [0001] The invention belongs to the technical field of membrane modules, and in particular relates to a hollow fiber nanofiltration membrane module. Background technique [0002] Membrane separation technology is a new type of high-efficiency and precise separation technology. It has the advantages of high-efficiency separation, simple equipment, energy saving, normal temperature operation, and no pollution. It is widely used in many industries in the industrial field. Compared with the traditional separation technology, it has the advantages of energy saving, high efficiency and high quality. [0003] However, due to the existence of the concentration polarization problem in the actual use process, the separation accuracy and separation rate of the membrane system are seriously affected. In order to reduce the influence of the concentration polarization, the liquid flow rate is generally increased, intermittent operation, unsteady liquid supply or multi-stag...

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Problems solved by technology

[0004] However, the existing technology for reducing concentration polarization has the following disadvantages: simply increasing the liquid supply speed will significantly increase energy consumption, and intermittent operation will significantly reduce operating efficiency, and non-steady state liquid supply or multi-stage series connection requires more comp

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