Gravity concentration device

Abstract

The invention discloses a gravity concentration device which comprises a primary settling area, a secondary settling area and a water inlet pipe, wherein an included angle alpha between the lower side wall of the primary settling area and the horizontal plane is more than 0 degree and less than or equal to 90 degrees; the top of the secondary settling area is connected with the bottom of the primary settling area; an included angle beta between the upper side wall of the secondary settling area and the horizontal plane is more than 90 degrees; a mud pipe 6 is arranged at the bottom of the secondary settling area; the area of the top opening of the secondary settling area is not larger than 1 / 2 of the maximum sectional area of the primary settling area; and an included angle delta between the lower side wall of the secondary settling area and the horizontal plane is more than 0 degree and less than 180 degrees. According to the device disclosed by the invention, the influence of vortex in the primary settling area on a flow field in the secondary settling area can be eliminated, vortex formed in the secondary settling area is effectively avoided, and the settling efficiency of solid particles is improved; and moreover, the sludge does not overflow out of the secondary settling area, and the system operation is stable.

Description

technical field [0001] The invention relates to a gravity concentrating device, in particular to a device for concentrating liquid by gravity settling. Background technique [0002] The current gravity sedimentation devices mainly include flat flow sedimentation tanks, vertical flow sedimentation tanks and radial flow sedimentation tanks, etc. These sedimentation devices have low sedimentation efficiency, poor sewage separation effect, strong bottom disturbance during sludge discharge, and system instability. And other issues. [0003] In the prior art, the Chinese patent document CN102078712A discloses a solid-liquid separation device. A mud seal is formed by setting a sedimentation tank at the lower part of the sedimentation tank and combining the intermittent working mode of the screw conveyor at the bottom of the sedimentation tank. On the one hand, the mud seal reduces the water content of the mud, on the other hand, it prevents the disturbance of the adsorption liquid...

AI Technical Summary

Problems solved by technology

In this technology, the angle between the sedimentation tank and the horizontal plane is 90°, resulting in a relatively small volume of the sedimentation tank, so that when dealing with high-turbidity liquids, solid particles can easily overflow the sedimentation tank, and in the Under the action of gravity and friction, it is closely attached to the bottom of the settling water tank. During actual use, the above-mentioned adhesion layer does not drop with the intermittent operation of the screw conveyor, which seriously affects the stability of the solid separation device

In addition, when the water inflow suddenly increases, there will be pulse flow or turbulent flow in the sedimentation tank, and the suspended solids cannot be effectively settled, which will affect the sedimentation effect

Images