Double water collection type flat sheet membrane element and support plate thereof

Abstract

The invention provides a support plate for a flat sheet membrane element. The support plate comprises a rectangular main body and two water collection pipes, wherein the two water collection pipes are respectively fixed on the left side and the right side of the rectangular main body; ten to twelve first longitudinal flow guide grooves and two first transverse flow guide grooves are formed in the front surface of the rectangular main body; the two first transverse flow guide grooves are respectively positioned at the upper end and the lower end of the ten to twelve first longitudinal flow guide grooves and are respectively communicated with the ten to twelve first longitudinal flow guide grooves. According to the double water collection type flat sheet membrane element and the support plate thereof, flow guide passages are utilized for running through the longitudinal flow guide grooves and the transverse flow guide grooves in the two surfaces of the support plate, so that water can smoothly flows in the flow guide grooves during water collection, and the subjected resistance is greatly reduced when the water comes out, so that the transmembrane pressure of the system is reduced, the operation consumption of the system can be greatly reduced during suction and drainage, and the water production efficiency is also improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a double water-collecting flat membrane element and a supporting plate thereof, which are used as core elements in MBR membrane bioreactors. Background technique [0002] Membrane bioreactor (MBR), as a practical sewage advanced treatment technology, has obvious technical advantages compared with traditional biochemical technology, and has a broad market and development space. MBR is a new type of water treatment technology that combines membrane separation unit and biological treatment unit. It replaces the secondary settling tank at the end of traditional biological treatment technology with membrane modules, maintains high active sludge concentration in the bioreactor, and improves biological treatment. load, thereby reducing the footprint of the sewage treatment facility, and reducing the amount of excess sludge by keeping the sludge load low. [0003] The flat ...

AI Technical Summary

Problems solved by technology

The large flat membrane element is positioned on the side (inserted into the U-shaped groove) to maintain the required spacing of the components (usually 7~8mm). For such a large plane, even such a thick plastic support plate is only positioned on both sides of the width. Deformation and warping will inevitably occur in actual use. Deformation and warping will cause the distance between two adjacent membrane elements to change at the warped position, especially if the distance becomes smaller, it will cause uneven air and water flushing between the membrane elements, resulting in mud accumulation. In turn, the membrane surface is clogged and the effluent flux is reduced.

Although theoretically, the disadvantage of warping and deformation can be overcome by increasing the thickness of the support plate, because it accounts for a relatively high cost of construction, increasing the thickness will cause a large increase in cost, which will affect the promotion and application of membrane bioreactors; secondly, the increase in the thickness of the support plate, It will also reduce the effective filtration area per unit volume (the number of pieces of the same component thickness will be reduced), and the weight will increase

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