Solid-liquid separation device

Abstract

The invention provides a solid-liquid separation device which comprises a settling water tank, the top of the settling water tank is provided with a liquid inlet, and a liquid outlet is arranged at one side close to the top of the settling water tank, of the settling water tank; the bottom of the settling water tank is provided with a silt deposit groove, the side wall of the settling water tank gradually shrinks towards the silt deposit groove and is connected with the top of the silt deposit groove, and the silt deposit groove is communicated with the settling water tank; the area of a top opening of the silt deposit groove accounts for 1 / 10-1 / 5 of the area of a top opening of the settling water tank; and the bottom of the silt deposit groove is provided with a helical conveyor, and an included angle b between the helical conveyor and the horizontal plane is less than 90 degrees. Through setting the silt deposit groove into the solid-liquid separation device provided by the invention and combining with the intermittent operation mode of the helical conveyor, luting is formed, through the luting, one the one hand, the moisture content of output silt is reduced, on the other hand,the disturbance of the rotation of the helical conveyor on an adsorption liquid is inhibited, thereby avoiding the occurrence of phenomenon that dust particles float upwards and flow out of the settling water tank along with supernatant liquor because of the disturbance caused by the helical conveyor.

Description

technical field [0001] The invention relates to a solid-liquid separation device, in particular to a solid-liquid separation device using a sedimentation method. Background technique [0002] Wet dust removal refers to the use of water or other liquids in contact with dust-containing gas to absorb impurities in the gas. During the above-mentioned treatment process, when dust particles meet sprayed water droplets, water films or wet devices, wetting, Coagulation, diffusion and sedimentation, etc., are separated from the gas to achieve the purpose of purifying the gas. Wet dust removal has the advantages of low investment, simple operation, small footprint, simultaneous purification of harmful gases, cooling and humidification of dusty gases, etc. It is especially suitable for the purification of high temperature, high humidity and explosive dangerous gases. However, since wet dust removal uses water or other liquids as purification materials, a large amount of muddy sewage w...

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Problems solved by technology

[0004] In this technology, the screw conveyor is exposed at the bottom of the settling chamber, and the space of the screw conveyor exposed to the settling chamber is also relatively large, so that when the spiral blades of the screw conveyor rotate rapidly, the The disturbance caused by the adsorption liquid causes the dust particles that have settled to the top of the screw conveyor to float up again, thereby greatly reducing the settling and separation efficiency of the solid-liquid separation device. The above problems are especially obvious for fine solids with a particle size below 75 μm

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