External spiral multipage reverse osmosis membrane

Abstract

The invention discloses a spiral multipage reverse osmosis membrane which is short in runner, low in resistance, high in flowing speed, high in water yield and high in membrane utilization rate. The spiral multipage reverse osmosis membrane comprises a center pipe (1), at least two membrane bags (2) and outer end water collection pipes (3), wherein the quantity of the outer end water collection pipes (3) is consistent with that of the membrane bags (2); a plurality of water inlets (4) are formed in the side surface of the outer end water collection pipes (3); the inner ends of the membrane bags (2) are fixed on the center pipe; the respective membrane bags (2) are tightly wound in the same direction in sequence along the center pipe (1), thus forming a cylinder consisting of a plurality of layers of membrane bags; the outer ends of the membrane bags (2) cover the outer end water collection pipes (3) inside, and raw water enters the membrane bags (2) through reverse osmosis, and is collected into the outer end water collection pipes (3) through the water inlets (4); pure water is discharged from the end parts of the outer end water collection pipes (3); and the pure water in the membrane bags (2) flows spirally from the center to the outer side. The spiral multipage reverse osmosis membrane can be widely applied to the field of clean water.

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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