SU1282858A1 - Drainage system for membrane element - Google Patents

Description

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The invention relates to a device for smallpox (, the introduction of membrane processes of microfiltration, ultrafiltration and reverse osmosis, in particular to devices with nlose membrane elements.

The purpose of the invention is to improve the performance of the membrane element by reducing the hydraulic resistance of the drainage device.

FIG. 1 shows a membrane element, a cut; in fig. 2 shows section A-A in FIG. one; in fig. 3 - drainage device, cross section; in fig. 4 is a section BB in FIG. 3; in fig. 5-7 - profiles of the edges of the drainage device, examples of execution.

The membrane element consists of a cover 1 and a bottom 2 reinforced with steel plates 3. A drainage device 4 with a membrane 5 mounted on it and a sealed replacement ring 6 is clamped between the cover and the bottom. The element is tightened and sealed with screws 7.

There are fittings 8 and 9 in the lid for entry and exit of the initial solution, and in the bottom - a clamp 10 for the output of permeate.

The drainage device is a plate made of plastic (fluoroplastic), on one side of which parallel grooves II are made, the ribs 12 between which have a shaped profile. Along the length of the grooves there are recesses 13 with a cross section exceeding the cross section of the grooves. On the other side

plates are made of transverse channels 14 communicating with the grooves at their intersections.

The profile of the cross section of the ribs and grooves is chosen from the conditions for ensuring the maximum value of the non-inverse surface of the membrane. The profile of FIG. 5 gives the minimum supported surface, but the presence of a sharp edge affects the strength of the membrane, since the specific pressure on the support is very large.

To carry out the process, the initial fluid under pressure is fed through the nozzle 8 to the membrane 5. The thin polymer membrane 5 does not fall down due to the small size of the spigot of the fins 12 and has a reliable operation for a long time, having a low specific pressure in the plane of contact with the penetration device 4 Acron the membrane 5, the purified liquid passes through the grooves 11 with recesses 13. From the grooves, the liquid flows into the channels 14, and through the nozzle 10 the product flows out of the membrane element.

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If necessary, the flow of fluid and air bleed using the second shtutser 9 on the cover I.

Thus, the implementation of grooves along the length of the grooves significantly reduces the hydraulic resistance of the flow of purified liquid, which increases the performance of the membrane element.

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Claims (1)

DRAINAGE DEVICE OF THE MEMBRANE ELEMENT, made in the form of a plate, on one side of which parallel grooves are made, the ribs between which have a curved profile, and on the other side there are transverse channels communicating with the grooves, characterized in that, in order to increase the productivity of the membrane element by reducing the hydraulic resistance of the drainage device, recesses are made along the length of the grooves, the cross section of which is not less than the cross section of the grooves. ί282858