Solid-liquid separator

Abstract

A solid-liquid separator that separates raw water containing suspended solids into suspended solids (solid) and treated water (liquid) in easy and a short time is provided. A solid-liquid separator includes a separation tub, an inflow pipe configured to rotate raw water which flowed from the outlet of the inflow pipe in the separation tub, a froth discharge pipe configured to discharge the suspended solids surfaced in the separation tub and a treated water discharge pipe configured to discharge treated water by which the suspended solids were removed from raw water from the separation tub.

1 . A solid-liquid separator for separating raw water containing suspended solids into suspended solids and treated water, the solid-liquid separator comprising:
 a separation tub having an outer wall and a bottom;   an inflow pipe having an outlet, the outlet of the inflow pipe being positioned outside of the center of the separation tub to rotate raw water which flowed in the separation tub from the outlet of the inflow pipe to the separation tub;   a froth discharge pipe having an inlet, the inlet of the froth discharge pipe being positioned near a surface of raw water in the separation tub to discharge the suspended solids surfaced in the separation tub; and   a treated water discharge pipe having an inlet, the inlet of treated water discharge pipe being positioned in the separation tub to discharge treated water in which the suspended solids were removed from raw water.   
     
     
         2 . The solid-liquid separator according to  claim 1 , further comprising a sludge discharge pipe having an inlet, the inlet of the sludge discharge pipe being positioned at the bottom of the separation tub to discharge the suspended solids precipitated in the separation tub. 
     
     
         3 . The solid-liquid separator according to  claim 1 , further comprising a fine air bubbles generator generating fine air bubbles of size adhering to the suspended solids with specific gravity smaller than that of water, and the fine air bubbles generator supplying the fine air bubbles to raw water. 
     
     
         4 . The solid-liquid separator according to any one of  claims 1  to  3 , further comprising:
 a pump for giving pressure to a part of raw water acquired from the separation tub or treated water discharged from the treated water discharge pipe for accelerating a rotation of raw water in the separation tub, and   a pipe for supplying raw water or treated water pressured by the pump to the separation tub.   
     
     
         5 . The solid-liquid separator according to  claim 3 , wherein the fine air bubbles include mixed gas of air and at least one of carbon dioxide or ozone. 
     
     
         6 . The solid-liquid separator according to  claim 2 , further comprising a magnetic flux generator provided outside of the separation tub, the magnetic flux generator being configured to generate magnetic force at the controlled timing and to move in the vertical direction along the outer wall of the separation tub. 
     
     
         7 . The solid-liquid separator according to  claim 6 , further comprising a magnetite carrier feeder for supplying magnetite carriers for absorbing the suspended solids to raw water. 
     
     
         8 . The solid-liquid separator according to  claim 7 , further comprising a magnetite carrier collect subsystem for collecting the magnetite carriers from the sludge containing the magnetite carrier discharged from the sludge discharge pipe. 
     
     
         9 . The solid-liquid separator according to  claim 7 , further comprising a flocculant feeder for supplying the flocculant to be drawn to the magnetic force to raw water. 
     
     
         10 . The solid-liquid separator according to  claim 1 , further comprising a conveying pump for supplying raw water to the inflow pipe. 
     
     
         11 . The solid-liquid separator according to  claim 1 , further comprising a cover board of umbrella shape provided between the inlet of the froth discharge pipe and the inlet of treated water discharge pipe. 
     
     
         12 . The solid-liquid separator according to  claim 1 , further comprising a froth collector provided at the inlet of the froth discharge pipe. 
     
     
         13 . The solid-liquid separator according to  claim 2 , further comprising a sludge collector provided at the inlet of the sludge discharge pipe. 
     
     
         14 . The solid-liquid separator according to  claim 11 , further comprising stir wings provided between the froth drain pipe and the cover board. 
     
     
         15 . The solid-liquid separator according to  claim 1 , wherein the suspended solids includes a sold with specific gravity smaller than that of water. 
     
     
         16 . The solid-liquid separator according to  claim 2 , wherein the suspended solids includes a solid with specific gravity larger than that of water. 
     
     
         17 . The solid-liquid separator according to any one of  claims 1  to  3 , further comprising:
 an acceleration water piping for applying pressure to a part of raw water acquired form the separation tub and supplying the part of raw water pressurized to the separation tub so as to accelerate a rotation of raw water in the separation tub.   
     
     
         18 . The solid-liquid separator according to any one of  claims 1  to  3 , further comprising:
 an acceleration water piping for applying pressure to treated water discharged from treated water discharge pipe and supplying treated water pressurized to the separation tub so as to accelerate the rotation of raw water in the separation tub.   
     
     
         19 . The solid-liquid separator according to  claim 17 , wherein the acceleration water piping includes a pump applies pressure to the part of raw water acquired from the separation tub. 
     
     
         20 . The solid-liquid separator according to any one of  claim 18 , wherein the velocity acceleration water piping includes a pump applies pressure to treated water discharged from treated water discharge pipe.