Efficient backwashing-free filtering clarification tank

Abstract

The invention discloses an efficient backwashing-free filtering clarification tank, and belongs to the technical field of water treatment suspended solid precipitation. According to the structure, the efficient backwashing-free filtering clarification tank is generally of a cylindrical structure, an inner cylinder is taken as a reaction chamber, a middle cylinder is taken as a guide chamber, an outer cylinder is taken as a clarification chamber, and suspended filtering devices which consist of non-metallic filtering materials with filtering functions and stirrers with filtering material stirring and washing functions are arranged inside the reaction chamber. The filtering materials consist of smooth flat granules, the stirrers are operated in a non-continuous mode, and the stirring time and the intermittent time can be set up after the water quality characteristics are tested and confirmed. Honeycomb-shaped inclined tubes are mounted inside the clarification chamber, so that the clarification effect can be improved; as compressed air washing devices are mounted at the upper ends of the inclined tubes, the inclined tubes can be periodically washed; compressed air nozzles are arranged in a single-row moveable manner, the inclined tubes can be washed row by row.

Description

Technical field: [0001] The invention relates to a filter and clarification device for sewage treatment. Background technique: [0002] At present, in water treatment projects, the clarification equipment used for water treatment mainly includes: mechanical acceleration clarifier, suspension clarifier and water conservancy circulation clarifier. Manual Volume 3 - Urban Water Supply, Chapter 7, Section 7.3 Clarification). Their clarification principles are: the mechanical acceleration clarifier is through the action of mechanical stirring, so that the sludge in the first reaction chamber is refluxed and reacts with the raw water after dosing, and continues to react in the second reaction chamber to form larger flocs. particles, and then enter the clarification chamber through the diversion chamber for sedimentation and separation; the suspension clarifier is a sludge suspension contact separation clarifier. The raw water to which the coagulant is added first passes through ...

AI Technical Summary

Problems solved by technology

The mechanical filter uses the contact and retention effect of the particle filter material on the suspended impurities in the water to treat the raw water. The advantage is that the treatment effect is good and the effluent water quality is high. Large amount of washing water

The problems existing in the mechanically stirred clarifier are firstly that the structure is complex, the construction is difficult and the construction cost is high; the second is that the mud content in the circulating sludge is difficult to achieve stable control, which makes the effluent water quality unstable

The problem of the suspension clarifier is that the suspension layer is unstable when the flow rate increases, and the adaptability to the change of the treated water volume is poor; the volume of sludge discharge is large, the scale of sludge discharge water treatment is large, the construction cost is high, and the treatment cost is high

The problem with the water conservancy circulation clarifier is that the negative pressure generated at the bottom of the tank by the jet of raw water sucks the reflux sludge several times larger than the raw water into the throat, so the pressure requirement on the raw water is higher than that of other types of clarifiers, making the raw water high power consumption

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