Highly efficient swirling desanding apparatus for sludge

Abstract

The invention relates to a highly efficient swirling mud-sand separation processing apparatus for sludge. The apparatus which comprises a cylinder shell, an iron fence, a conical body, a cylinder bottom support frame, a tangential mud inlet, a mud inlet tube, a sand outlet, a flow deflector, a mud outlet tube, a mud outlet and fixing points is characterized in that: the lower part of the cylindershell is connected with the upper part of the conical body; the flow deflector is fixed in the middle chamber of the cylindrical shell; the mud inlet is positioned in a tangential direction of the side wall of the cylindrical shell; and the mud outlet tube horizontally stretches out of the middle part of the cylindrical shell, and is arranged slightly higher than the mud inlet. The mud-sand separation processing apparatus which utilizes the screw type sludge flow deflector additionally arranged in the cylindrical shell allows the retention time of the sludge in the mud-sand swirling separation processing apparatus to be increased and the highly efficient mud-sand separation to be reinforced. The mud-sand swirling separation processing apparatus which allows the function unification of swirling desanding and settlement desanding to be realized and sands in the sludge to be filtered out in the swirling and settlement process allows the subsequent processing of the sludge to be easy. Themud-sand separation processing apparatus of the invention has the advantages of simple structure of a whole system, small occupied land, convenience in working, low power and high efficiency.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a device for cyclone sand removal treatment of liquid sludge in urban sewage treatment plants. Background technique [0002] A certain amount of sand particles are often entrained in the sewage of urban sewage treatment plants. If these sand particles are not effectively removed, it may accelerate the wear and tear of sludge pumps, dehydration machinery and other equipment. In sewage treatment plants with sludge anaerobic treatment facilities , will lead to a decrease in the effective volume of the digester and affect the normal operation of the anaerobic digestion facility. In order to effectively remove the sand particles in the influent sewage of sewage treatment plants, at present, urban sewage treatment plants are equipped with grilles and grit chambers to carry out sand removal pretreatment for sewage. However, after the sewage is pretreated in the grit c...

AI Technical Summary

Problems solved by technology

However, after the sewage is pretreated in the grit chamber, although the sand particles in it can be greatly reduced, some sand particles will inevitably enter the next step sewage treatment unit, and this point is not stable for the influent flow, It is especially prominent in treatment plants where the water is combined sewage and the cyclone type grit chamber is used.

The adverse effects brought about by the high sand content of sludge have brought troubles to the normal operation of many urban sewage treatment plants in our country.

However, judging from the current situation, there are no literature and patent reports on sludge removal treatment at home and abroad.

Due to the high viscosity of sludge and the coercion effect of sludge on sand particles, it is difficult for the existing sewage desanding facilities to achieve a good desanding effect, and this has been confirmed by the experiment of Bailonggang Water Purification Plant

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