Rotary membrane separation device and application thereof

Abstract

The invention relates to a rotary membrane separation device and an application thereof. The two ends of a hallow shaft are fixed on the bracket; the hollow shaft is sheathed with a revolving drum the two ends of which support on the hollow shaft in a revolving and free manner; the chamber of the revolving drum is communicated with the cavity of the hollow shaft through the communication hole on the hollow shaft; the excircle of the revolving drum is provided with a collecting pipe along the axial direction; a communication opening is arranged at the joint of the collecting pipe and the revolving drum; the chamber of the collecting pipe is communicated with the chamber of the revolving drum through the communication opening; the collecting pipe is provided with a filtering membrane component the two side surfaces of which are stuck with filtering membrane materials; the effluent opening at the bottom part of the filtering membrane component is communicated with the collecting pipe; the filtering membrane component chamber constitutes a channel with the cavity of the hollow shaft via the collecting pipe chamber and the revolving drum chamber; one port of the hollow shaft is connected with a suction pump and the other end is connected with a standby conduit; one end surface of the revolving drum is fixedly provided with a transmission gear which is driven by a motor. The device can conveniently realize the separation of particulate matters, colloid, microorganisms and molecular mixtures in water or other solvent medium.

Description

technical field [0001] The invention relates to a rotary membrane separation device and its application, belonging to the technical field of water treatment and industrial separation. Background technique [0002] The fluid utilizes the filtration characteristics of the membrane material to achieve the separation of solid-liquid or molecules of different sizes, and intercept impurities in water or other fluid media through the membrane pores. There are many kinds of membranes made of various natural or synthetic materials, showing various characteristics in physical, chemical and biological properties. According to the size of the particulate matter in the raw liquid intercepted by the membrane, the membrane pores are divided into microfiltration membrane, ultrafiltration membrane, nanofiltration membrane and reverse osmosis membrane from coarse to fine. Membrane separation process as driving force. In order to facilitate assembly and industrial operation, improve membrane...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used assembly forms of membrane separation equipment are: plate and frame type, spiral wound type, circular tube type, hollow fiber type and capillary tube type. The first two adopt flat membrane, and the latter three adopt tubular membrane. A form of membrane module, the shape is similar to the ordinary plate and frame filter press, the production and assembly are simple, but the sealing is more complicated, the pressure loss is large, the packing density is small, and the operation, cleaning, maintenance and replacement of its large modules are more difficult

The production and processing of the spiral wound type is complicated, it is easy to be blocked during the operation, and it is difficult to replace when it is partially damaged, especially not suitable for the situation of large processing capacity.

The circular tube type is composed of a membrane and a support body of the membrane. There are two operating modes: internal pressure type and external pressure type. Liquid can control turbulent flow, not easy to clog, small pressure loss, but low packing density, suitable for manufacturing small equipment

The hollow fiber type and the capillary type are to install the fiber bundles in the collection pipe, and the two ends of the pipe are bonded with resin, and there are water inlet and outlet pipes and backwash nozzles, which are characterized by high packing density and relatively low cost, but are sensitive to clogging , the fouling and concentration polarization on the membrane surface have a great influence on the separation performance of the membrane

[0004] Due to the obvious concentration polarization phenomenon in the membrane filtration process, impurities in the filtrate can easily form a gel layer on the membrane surface, resulting in a decrease in membrane flux and an increase in operating pressure.

The solution to this problem includes air flow disturbance, backwashing, regular cleaning, etc., which brings a lot of inconvenience to the membrane separation operation and limits the popularization and application of membrane technology.

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