Sand and stone screening device having wastewater treatment function

Abstract

The invention discloses a sand and stone screening device having the wastewater treatment function. The sand and stone screening device comprises a sand containing hopper, a conveying device, a multi-level sand filtering device, a sand piling room, a drainage ditch, a wastewater recycling pool and a sand washing device. The inner wall of each roller is provided with spiral vanes, the moving path of sand and stone is effectively lengthened, and full screening of the sand and stone is promoted. The distances among the spiral vanes are reasonably arranged according to the particle sizes of the sand and stone, and the screening effect is guaranteed. The ground of the sand piling room is provided with water tanks, the buffer effect is achieved for the falling sand and stone, and the ground is protected. By means of detachable partition plates, the capacity of each compartment is reasonably adjusted according to the sand and stone screening condition, and the space utilization rate is guaranteed. Wastewater is collected and purified through the wastewater recycling pool. A square filter plate and a step-shaped filter plate are matched to be used, and the purification effect is improved.

Description

technical field [0001] The invention belongs to the technical field of building material processing equipment, and in particular relates to a gravel screening device with sewage treatment function. Background technique [0002] With the development of the construction industry. The demand for sand used in the domestic construction industry has increased. The construction industry uses a large amount of sand materials, and has different demands for sand materials of different particle sizes. Therefore, the sand material needs a sand screening process before it is used. The purpose is to separate the coarse sand from the fine sand. The method is inefficient and labor-intensive; on the other hand, the sand often contains mud and other harmful impurities, such as saline and alkali, which can corrode steel bars and affect the life of the building. Therefore, the mud and harmful impurities in the sand need to be cleaned . [0003] Chinese Patent No. CN201810048245.X discloses a...

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Problems solved by technology

[0005] Due to the limited working length of the currently used sand screening device, one screening cannot fully separate the sand and gravel with large and small particle sizes, and repeated screening operations are required, and the work efficiency is low; due to the irregular shape of the sand and gravel, the surface is relatively sharp , the impact with the ground during the stacking process will easily cause damage to the ground; the space for storing building materials at the construction site is limited, and the currently used sand screening device cannot reasonably plan the sand stacking space, which is likely to cause space waste or insufficient space; most The sand screening device cannot accurately screen the sand and gravel into multiple particle size segments, but can only simply screen the large and small sand and gravel; the existing sand screening device uses water to wash the sand and gravel at the same time during the sand screening process. Larger volume, lower water utilization

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