Simple and efficient integrated coagulation clarification tank and working method

Abstract

The invention relates to a simple and efficient integrated coagulation clarification tank and a working method thereof. The existing mechanical stirring clarification tank has the defects of complex structure, large operation and maintenance workload, higher investment and the like. The simple and efficient integrated coagulation clarification tank comprises a clarification tank, a clarification tank partition wall (7) is mounted in the clarification tank and divides the clarification tank into an inner area and an outer area, the inner area is a flocculation area (18), the outer area is a separation area (19), a water inlet pipe (5) is mounted at the top of the clarification tank, a pipeline mixer (9) is mounted on the right side of the water inlet pipe, and a flocculant dosing device (10) is mounted between the pipeline mixer and an electric control valve (11). A first-stage stirrer A (8) and a group of second-stage stirrers B (13) are sequentially arranged in the flocculation area from top to bottom, a mud scraper (16) is arranged below the clarification tank, a group of stirrers C (17) are respectively arranged at the top ends of bridge arms of the mud scraper, and a transmission shaft (16) is vertically arranged in the middle of the mud scraper. The invention is used for the simple and efficient integrated coagulation clarification tank.

Description

technical field [0001] The invention relates to the technical field of water, waste water, sewage or sludge treatment, in particular to a simple and efficient integrated coagulation clarification tank and a working method. Background technique [0002] The clarifier is a solid-liquid separation equipment widely used in the field of water treatment. According to the working principle, the clarifier can be divided into a sludge separation type and a sludge filter type. The sludge separation type clarifier includes a mechanical stirring clarifier and a hydraulic circulation clarifier. The sludge filtration clarifier includes a suspension clarifier and a pulse clarifier. The sludge in the sludge separation clarifier circulates the sludge in the clarifier through hydraulic or mechanical action, and the fine impurities in the raw water are in contact with the sludge. After being adsorbed and flocculated, solid-liquid separation is carried out through precipitation to obtain recycl...

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Problems solved by technology

[0003] Among the separation clarifiers, the mechanical agitation clarifier is the most widely used. It has the characteristics of large processing capacity, good separation effect and strong adaptability, but its structure is more complicated, the workload of operation and maintenance is large, and the investment is higher. It is suitable for the water quality of fine suspended solids, but sometimes the sludge will be washed to the clear water area by the water flow, and it has higher requirements for coagulation, and its stability is not as good as that of the separation clarifier

[0004] The mechanical agitation clarifier in the prior art is mainly composed of an annular water distribution tank, a first flocculation chamber, a second flocculation chamber, a separation chamber, a stirring impeller, and a sump. The gap between the water distribution tank and the conical cylinder flows into the first flocculation chamber evenly. The flocculant can be added into the water distribution tank or the first flocculation chamber. Under the action of the stirring equipment, the raw water is fully flocculated in the first flocculation chamber. The formed flocs enter the second flocculation chamber under the lifting action of the stirring impeller to form larger flocs, and then enter the separation chamber for solid-liquid separation, and the separated clarified water overflows into the upper sump for collection. Discharge, part of the sedimented sludge enters the first flocculation chamber through the return gap of the tank wall to participate in adsorption and flocculation again, and the other part is discharged after being collected by the sludge hopper. The mechanical agitation clarifier has the disadvantages of complex structure and high investment.

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