Outer spiral multi-page reverse osmosis membrane

Abstract

The invention discloses a spiral multi-page reverse osmosis membrane with short flow channel, small resistance, fast flow velocity, large water production and high diaphragm utilization rate. The invention comprises a central pipe (1), at least two film bags (2), and outer end water collection pipes (3) with the same number as the film bags (2), and the side of the outer end water collection pipes (3) is provided with Several water inlets (4), the inner ends of the film bags (2) are fixed on the central tube (1), and each of the film bags (2) are tightly wound in the same direction along the central tube (1) , forming a cylinder composed of multi-layer film bag layers, the outer end of the film bag (2) wraps the outer water collection pipe (3) inside, and the raw water enters the film bag (2) through reverse osmosis, and collected into the outer water collection pipe (3) through the water inlet (4), and then the pure water is discharged through the end of the outer water collection pipe (3), and the pure water in the membrane bag (2) Water flows spirally from the center to the outside. The invention can be widely used in the field of water purification.

Description

technical field [0001] The invention relates to a reverse osmosis membrane component. Background technique [0002] Reverse osmosis membrane components are commonly used components in water purifiers. In order to save space and facilitate installation and use, traditional reverse osmosis membrane components adopt the method of spirally winding a single membrane bag along the central water production pipe, and finally form a cylindrical shape composed of multiple layers of tight membrane bags, and the central pipe is used as a water collection pipe , the multi-layer pure water of the membrane bag is collected into the water collection pipe in the center of the element, that is, the direction of the pure water flow channel is in the form of an inner spiral, the flow channel is long, the resistance of the pure water flow channel is large, the flow rate of pure water is slow, and the reverse osmosis membrane The effective reverse osmosis of the components is reduced, resulting ...

AI Technical Summary

Problems solved by technology

like Figure 1 ~ Figure 3 As shown, this multi-membrane bag reverse osmosis membrane component mainly includes a central water collection pipe 10 and a plurality of membrane bags 20. The side of the central water collection pipe 10 is provided with several rows of water inlets 40 corresponding to each membrane bag 20. The central water collection pipe The inside of 10 is provided with a partition 50 near one end. Its principle is similar to the traditional one, except that one film bag is changed into multiple film bags, which reduces the length of a single flow channel and reduces part of the flow channel resistance, but still uses The central pipe is used as a water collection pipe, so there are still inherent defects of traditional reverse osmosis membrane components. The purified water flows into the central water collection pipe 10 through the guide cloth of each membrane bag 20, that is, water is collected from the periphery to the center, and pure water only flows from the One end of the central water collection pipe 10 flows out. Since the purified water of the multi-membrane bag is concentrated in one central water production pipe, the resistance of the purified water flow increases, the flow speed slows down, and the pressure inside the membrane bag increases.

The water production of reverse osmosis membrane is greatly affected by the reverse osmosis membrane. The increase of the pressure in the membrane bag causes the effective reverse osmosis pressure to decrease, resulting in a decrease in the total water production of the membrane element and a decrease in the utilization rate of the membrane.

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