Sand setting and collecting apparatus

Abstract

The invention belongs to the equipment that separates the deposing solid grains from liquid and collects them, and especially relates to collecting equipment of settled sands of sewage treatment. The invention comprises the jeer block moving along the aeration settling pit, which is characterized in that the jeer bloc is set the upper and the lower guide wheels connected by pedrails or chains, and the pedrails and chains have spade heads. The upper guide wheel has driving equipment, driving chain wheels or guide wheels. The spade-heads circle along the chains or pedrails to dig out the settled sands. Compared with the sand absorbing pump technology, the invention uses the spade-head to shovel sands, which is simple and reliable. The sands dig out has little water and needn't going into sand-water separator. The invention simplifies the technique, saves the equipment and energy; and it can synchronously operate with the floating slag scratching equipment on the jeer block. It is feasible and economical to alternate the present pump-absorbing jeer block.

Description

technical field [0001] The invention belongs to a device for separating and collecting precipitated solid particles from liquid, in particular to a device for collecting sand in sewage treatment. Background technique [0002] In the sewage treatment technology, the sand particles heavier than water are often settled by aeration or other methods, so that they sink into the grit chamber, and then sucked out from the grit chamber by means of centrifugal pump suction. The Chinese invention patent No. 85108394 discloses a grit collection device for sewage treatment equipment, which includes a truss car that can move along the aerated grit chamber, a centrifugal pump is suspended on the truss car, and the centrifugal pump can be submerged into the water to move the pond. The sand and water at the bottom are pumped out and transported to the sand-water separator on the truss truck through pipelines. The separated water flows back to the aeration gr...

AI Technical Summary

Problems solved by technology

[0003] The grit collection device of this structure has the following defects: 1. The operating cost is high and the work efficiency is low. Only 100 cubic meters of water can be used to obtain about 1 cubic meter of sand, which wastes about 99% of electric energy.

2. The maintenance cost is high, the equipment is seriously worn, and the pump casing and blades of the centrifugal pump need to be replaced frequently

3. The failure rate is high. Due to uneven sand settling, pump blockage often occurs, which affects normal operation.

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