Tubular micro-filtration membrane production equipment

Abstract

The invention discloses tubular micro-filtration membrane production equipment which comprises an ingredient storage tank and a membrane storage tank connected with the ingredient storage tank, and also comprises a nitrogen cylinder connected with the ingredient storage tank through a first valve, wherein the nitrogen cylinder is connected with the membrane storage tank through a tenth valve; a sintering tube device is arranged in the rear of the membrane storage tank; a discharging tank is connected to the sintering tube device; a vacuum pump is connected to the discharging tank; the sintering tube device is respectively connected with the upper and lower ends of the sintering tube device through a fifth valve and a sixth valve; a fourth valve is connected to the ingredient storage tank; and a seventh valve and an eighth valve are respectively led out of the fourth valve and are connected with the upper and lower ends of the sintering tube device. According to the equipment, when polyvinylidene fluoride tubular micro-filtration membranes are produced, membrane fluid can permeate into pores of the whole wall thickness of the supporting tube, and the membrane fluid is tightly combined with the whole body of the porous supporting tube. Because microfiltration membranes are formed on the wall thickness of the whole membrane tube from interior to exterior, the phenomena of wear, peeling and perforations are avoided.

Description

technical field [0001] The invention belongs to the technical field of polymer separation membranes, and in particular relates to equipment for preparing polyvinylidene fluoride tubular microfiltration membranes by a dynamic method. Background technique [0002] In order to alleviate the shortage of water resources, it is the most economical and effective way to treat the wastewater on site and reuse it. In order to maximize the reuse of purified water, the commonly used technology is that the wastewater is first treated conventionally, and then treated by tubular microfiltration membranes and multi-stage reverse osmosis membranes. Depending on the quality of raw water, the reuse rate of purified water can generally reach 85-95%, effectively alleviating the contradiction of water shortage. [0003] Tubular microfiltration membranes commonly used in recycling processes are usually prepared by sintering high-molecular polyethylene into a tube (the tube wall is a porous struct...

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Problems solved by technology

[0004] This kind of tubular microfiltration membrane, because only a very thin film layer is scraped on the inner wall surface of the tube, during the water treatment operation and chemical cleaning process, due to the impact of water flow and the corrosion of chemical agents, this film is easy to wear , perforation, and peeling problems, causing wastewater to pass directly without membrane interception and filtration (commonly known as "short circuit" phenomenon), which affects the quality of produced water

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