Micro-net component with rotary mobile micro-net body distributed with shock absorption and continuous line-shaped backwash

Abstract

The invention relates to a micro-net component with a rotary mobile micro-net body distributed with shock absorption and continuous line-shaped backwash, comprising a micro-net box body and a backwashpipe. The micro-net component is characterized in that the micro-net box body consists of an upper sealing cover plate and a lower sealing cover plate, a left squirrel cage-shaped rolling cylinder and a right squirrel cage-shaped rolling cylinder, a cambered baffle and a plurality of water collecting pipes with convex wings and the micro-net body; the left rolling cylinder and the right rolling cylinder are arranged between the upper sealing cover plate and the lower sealing cover plate, and one of which is connected with a driving mechanism; the micro-net body winds the left and the right rolling cylinders to constitute a closed ring and is connected with the upper sealing cover plate and the lower sealing cover plate in a sealing and sliding manner; the rotation speed is 1-5m / H; the water collecting pipes which use the convex rings to push the micro-net body for even distribution, the cambered baffle which surrounds the inner diameter of one rolling cylinder and the backwash pipe which uses a water injection nozzle for pushing the micro-net body at the junction of the end of the micro-net body rolled into the rolling cylinder and the cambered baffle are vertically fixedly arranged between the upper sealing cover plate and the lower sealing cover plate; a scraper is arranged on the outside of the micro-net body; and an interference water outlet is arranged on the lower part of the rolling cylinder of the cambered baffle and below the cylinder. The micro-net component has the advantages of large film generation area, stable effluent water flux and water quality, small cavity of the box body and high yield.

Description

technical field [0001] The invention relates to a membrane module for membrane bioreactor technology in the field of sewage and wastewater treatment, in particular to a rotary membrane module with the synergistic effect of microbial bacteria micelles and micro-fine filter screens (commonly referred to as micro-screens in the industry) to achieve the effect of microfiltration solid-liquid separation. The moving micro-grid distributes vibration and continuously backwashes the micro-grid assembly. Background technique [0002] Membrane Bio Reactor (MBR for short) is a new type of water treatment device that combines sewage and wastewater biological treatment technology with membrane separation technology. The characteristics of low sludge volume have been widely used in the field of water treatment, especially in sewage and wastewater recycling projects. However, MBR has the disadvantages of high component cost, short service life, flux drop, clogging, deep membrane fouling an...

AI Technical Summary

Problems solved by technology

However, the technology is currently immature and is still in the research and development stage

Because the micro-grid components must be "immersed" in the mixed solution containing activated sludge to effectively "generate" the dynamic film, and "disturbed water flow" is a necessary condition for the formation of the mixed solution, the traditional submerged MBR cleverly uses the disturbed water flow Conditions, by adjusting the relative position of the water flow and the membrane surface, the "cross-flow" filtration method is used to shear and scour the pollutants attached to the membrane surface, which is very effective in inhibiting the rapid decrease of the flux and delaying the membrane fouling, but it is not effective for For active and flexible dynamic membranes that use pollutants for solid-liquid separation (pollution suppression or pollution control), no matter whether the disturbed water flow is in contact with the micro-network in the forward direction or in the opposite direction, the micro-network will be different. Amplitude and normal vibration of different frequencies; the amplitude and frequency of this irregular vibration vary widely, which has an adverse effect on the attachment and growth of the dynamic film on the micro-network: it reduces the adhesion of the film layer and grows unevenly , the thickness of the gel layer is different, and it is very easy to appear "holes" caused by the partial film layer falling off. The center of the film surface is difficult to form an effective gel layer due to the relatively high amplitude.

Therefore, the existing dynamic membrane technology has a poor interception effect on dissolved organic matter with a large molecular weight, and the effluent turbidity and the total number of bacteria fluctuate and are difficult to control at the level of traditional MBR.

Since the amplitude of vibration on the surface of the micro-grid gradually increases from the frame of the component to the center and is irregular, the larger the area, the higher the probability of "holes" appearing, and the harder it is to guarantee the water quality. Therefore, the area of ​​the micro-grid is also the dynamic membrane. The generation area is difficult to enlarge, and the membrane area of ​​a single module is limited

At the same time, due to the continuous thickening of the film layer, when the flux drops to the point where backwashing is necessary, a large amount of water or air-mixed water is required, which makes the backwashing equipment have large capacity, high energy consumption, and high equipment idle rate

After backwashing, due to the time required for dynamic membrane regeneration, a certain amount of interfering water without effective membrane filtration will be produced during this period, so there are problems such as intermittent water discharge and low water discharge rate, large cavity of the module, and waste of reactor volume. These technologies The bottleneck on the surface hinders the large-scale engineering application of dynamic membrane technology

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