Optimization pressure and on-line cleaning-membrane biological reactor (OPLC-MBR) dirt-resisting type plain membrane component system device

Abstract

The invention discloses an optimization pressure and on-line cleaning-membrane biological reactor (OPLC-MBR) dirt-resisting type plain membrane component system device. The device discharges water from an upper water outlet and a lower water outlet and has high membrane flux, so that the effective working time of a membrane is improved. The device comprises a plain membrane component, a water collection system and an aeration device, wherein an upper orifice and a lower orifice are formed in each membrane element of a plain membrane element A of the plain membrane component; the water collection system comprises a water collection main pipe 1, a cleaning agent feeding pipe 3, a cleaning agent backflow pipe 2, and an upper water collection pipe C2 and a lower water collection pipe C1 whichare arranged on each group of components; the upper orifice and the lower orifice of each membrane element are connected with the upper water collection pipe C2 and the lower water collection pipe C1respectively; a water collection slit and a water collection tank which are annularly penetrated are formed on the two sides of a clapboard of the plain membrane element A; a middle horizontal water gathering tank is formed between the water collection slit and the water collection tank; the upper water collection pipe C2 is connected with the water collection main pipe 1 and the cleaning agent feeding pipe 3 respectively; and the lower water collection pipe C1 is connected with the water collection main pipe 1 and the cleaning agent backflow pipe 2 respectively.

Description

technical field [0001] The invention relates to an anti-fouling membrane module system device, in particular to an OPLC-MBR anti-fouling flat sheet membrane module system device. Background technique [0002] With the development of social economy and the improvement of people's living standards, people have higher and higher requirements for the quality of water environment. At the same time, the development of modern science and technology and large-scale production have made the characteristic pollutants entering the water environment qualitatively and Huge changes have taken place in the quantity, making it difficult for traditional water treatment technologies to adapt to increasingly stringent sewage discharge standards and standardized management requirements. On the other hand, with the shortage of water resources and the crisis of energy, the national policy of water resource utilization and energy saving and emission reduction has become an important task of water ...

AI Technical Summary

Problems solved by technology

[0005] ①The distribution of resistance is different: since each membrane element has only one suction port, the water collection seam and groove on the diaphragm of the membrane element have a short distance near the suction port, and the resistance is small; far away from the suction port, the distance is long and the resistance is large; ②Uneven water collection: Due to the different distances between the water collection seams and grooves on the diaphragm of the membrane element and the suction port, the resistance is different, resulting in different membrane fluxes at each point of the membrane element and uneven water collection; ③Transmembrane pressure difference TMP Uneven distribution: Under the action of the suction force, a layer of sludge is formed on the surface of the membrane, which is the dynamic membrane. Due to the uneven distribution of the internal resistance of the membrane element, the distribution of the dynamic membrane is uneven, and the thickness is different, which makes the collapse Uneven distribution of membrane pressure difference TMP; ④ Uneven distribution of membrane surface pollution degree: Due to the small resistance near the suction port of the membrane element, large membrane collapse pressure difference, high membrane flux, and high concentration of pollutants, membrane pollution in this area The degree is higher than that in other places. When the membrane collapse pressure difference here reaches the set cleaning maximum value, the membrane collapse pressure difference in other parts is far smaller than this value, resulting in shortened cleaning cycle and insufficient performance of the membrane element; ⑤ Gravity perfusion of cleaning solution, dead-end static cleaning, poor effect Usually, when the membrane is cleaned online, the cleaning agent is poured through the suction port according to gravity, but the water in the membrane element cannot be removed, and the cleaning agent is dead-end static in the membrane element, resulting in The cleaning agent can only be diffused by the concentration difference, so the cleaning effect cannot be guaranteed

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