Micro-net component with continuous mobile line-shaped backwash and distributed with shock absorption and application method thereof

Abstract

The invention relates to a micro-net component with continuous mobile line-shaped backwash and distributed with shock absorption and an application method thereof. The micro-net component comprises a rigid square enclosure frame and a box body which is formed by a micro-net body packaged on the two end surfaces of the enclosure frame. The micro-net component is characterized in that the micro-netbody is formed by overlapping a plurality of layers of micro-nets with different pore diameters; a backwash bracing plate, a backwash water supply pipe and a plurality of positioning water collectingpipes are arranged in the box body; the positioning water collecting pipes are parallel to a left enclosure plate and a right enclosure plate and fixed between an upper enclosure plate and a lower enclosure plate; the backwash bracing plate is a cavity plate body which crosses the micro-net body and is sleeved on the positioning water collecting pipes in a sliding fit way; the front and the back end surfaces thereof are arc surfaces with water spray slits for bracing the micro-net body; the backwash water supply pipe and the backwash bracing plate are vertically connected in a sealing manner and further connected with a driving mechanism; and when in use, 5 per mill-1 percent of one or more environmental mineral materials with the particle size of being lower than 200 meshes are added in waste water to be treated according to the weight ratio. The micro-net component has the advantages that the film generation area is large, the quality of outlet water is good and stable, the yield ishigh, the cost is low, and a power and control system is optimized and simplified.

Description

technical field [0001] The invention relates to a membrane module for a membrane bioreactor process in the field of sewage and wastewater treatment, in particular to a continuously moving linear backwashing and distributed vibration damping micro-grid module and an application method thereof. 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. MBR has a higher quality solid-liquid separation effect and a higher removal effect on organic matter, good effluent water quality, small footprint, low residual sludge, and high degree of automation. In the field of water treatment, especially in sewage and wastewater resources It has been widely used in chemical engineering. However, there are the following disadvantages and obstacles in the promotion process of MBR: (1) MBR adopts special microfiltration or ultrafiltration m...

AI Technical Summary

Problems solved by technology

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

[0004] The existing micro-network dynamic membrane technology basically relies on cross-flow filtration to control the dynamic membrane thickness to reduce membrane fouling and rely on intermittent backwash to update the dynamic membrane to ensure membrane flux, which is very effective for traditional MBR solid membrane modules to reduce pollution. However, it will have some adverse effects on active and flexible dynamic membranes that use pollutants for solid-liquid separation (fouling suppression or pollution control). Cross-flow exists while shearing and scouring the dynamic membrane surface. For the irregular normal vibration of the surface of the support carrier, that is, the micro-network, the frequency band of this irregular vibration is very wide, which makes the growth of the membrane layer impossible to be uniform, and the center of the membrane surface is difficult to form an effective gel layer due to the high amplitude of the membrane surface.

Therefore, the existing dynamic membrane has a poor interception effect on dissolved organic matter with a large molecular weight; the cross-flow shear scour and normal vibration can easily cause "loopholes" in the dynamic membrane layer, making the turbidity of the effluent and the total number of bacteria fluctuate And it is difficult to control the level of the traditional MBR; because the area of ​​the micro-network is directly proportional to the filtration flux, and the amplitude of the irregular vibration of the cross-flow on the surface of the support carrier gradually increases and becomes irregular from the surrounding frame to the center of the membrane surface, the more the membrane surface The larger the size, the higher the probability of "loopholes" and the more difficult it is to guarantee the water quality. Therefore, it is difficult to enlarge the surface area of ​​the micro-grid and the generation area of ​​the dynamic membrane. The smaller module membrane area and the amount of treated water limit the technology. Large-scale water treatment applications; during use, due to the thickening of the film layer and excessive dirt attached, the flux drops to the point where backwashing must be performed, because intermittent backwashing requires a large amount of water or air-mixed water, making backwashing Large equipment capacity, high resource consumption and energy consumption, and high equipment idle rate; after backwashing, a large amount of unfiltered interference water will be generated during dynamic membrane regeneration, making it difficult to increase the water yield

These technical bottlenecks make it difficult to realize engineering utilization of dynamic membrane technology

Images