Ladder water inflowing rolling membrane element of opening water producing runner

Abstract

The invention discloses a ladder water inflowing rolling membrane element of an opening water producing runner, which comprises a central tube, water inflowing partition nets, water producing partition nets and flat plate membranes, wherein each water producing partition net is mounted between each folded flat plate membrane; one edge of the inner side of the end face of each flat plate membrane and the side edge of the upper end face of each water producing partition net are sealed by sealants to form a water producing unit; the water producing units are placed on the water inflowing partition nets; the rolling is conducted by taking the central tube as an axle center, and the sealing is conducted to form rolling membranes; water producing collection sleeves and membrane end sealing sleeves are arranged at the two ends of the rolling membranes; and the rolling membranes are externally provided with membrane housings. The ladder water inflowing rolling membrane element has the characteristics of wide effective area, high recovery rate, large water producing amount and pollution resistance.

Description

technical field [0001] The invention relates to a roll-type membrane element, in particular to a step-inlet type roll-type membrane element with an open water production channel. Background technique [0002] At present, most of the membrane elements used in the existing well water and surface water reverse osmosis systems are coiled membrane elements. It has significant advantages in terms of requirements, investment and operating costs. The existing reverse osmosis membrane elements use plastic mesh as the water inlet channel partition, the purpose of which is to provide a path as close to turbulent flow as possible for the inlet water, so that the inlet water can fully flow between the coiled membranes parallel to the direction of the membrane elements, In the water production flow channel, plastic mesh is used as the water production channel, and the production water flows into the center pipe along the longitudinal direction perpendicular to the membrane element. Most...

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Problems solved by technology

On the other hand, since the water inlet direction of the traditional membrane element is parallel to the central pipe and flows through the water inlet channel, in order to achieve a high system recovery rate, it is often necessary to connect several branch membrane elements in series, which increases the initial stage of system establishment to a certain extent. The fixed investment, and with the increase of water production, the membrane elements located in the back stage face the risk of high fouling and high fouling due to the decrease of water flow, and for small systems containing only 1 or 2 membrane elements, it will cause A large amount of waste water is generated and wasted. At the same time, as the recovery rate increases, the flow rate of the feed water in the membrane element will decrease with the increase of the water passing through the membrane, which will increase the risk of fouling and fouling in the membrane element.

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