JPH0618562Y2 - Solid-liquid separation device using vortex flow - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid separation device for capturing suspended substances contained in sewage, industrial wastewater, etc. by means of a vortex flow generated.

[0002]

2. Description of the Related Art Heretofore, as a solid-liquid separation of a suspended substance contained in water to be treated, a slant plate method has been widely used in which fine particles are mainly separated by gravity settling.

[0003]

[Problems to be solved by the invention] In this case, since the fine particles are lightweight, the settling time becomes long only by the gravity settling action.
Further, there is a drawback that the separation volume becomes large.

[0004]

[Means for Solving the Problems] Therefore, in order to eliminate these drawbacks, the inventor et al. Installed a block made of a hollow body in the separation tank and provided with water passage holes on the upper and lower surfaces, and The present invention proposes a solid-liquid separation device by means of a vortex, which is characterized in that a flow obstruction means is constituted by stacking them in communication.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. Conventionally, as shown in FIG. 4, a vortex flow b generated by a plurality of fins a, which are arranged at appropriate intervals, is used in a plane substantially orthogonal to the water flow, in addition to the action of gravity, A forced and dynamic solid-liquid separation means has been proposed, which uses the action of fluid drag force or inertial force as a propulsion force. This invention provides a solid-liquid separation device which further develops the separation phenomenon by the vortex flow b. The purpose is to

As one embodiment of the present invention, FIG. 1 shows a mixed water having a fine flocks formed by injecting a flocculant 2 into water to be treated 1 containing a suspended substance and rapidly stirring in a mixing tank 3. Is introduced into the separation tank 5 through the pipe line 4, a laminar flow state is obtained through the flow straightening plate 6 having a large number of small holes formed in one surface, and solid-liquid separation is performed in the flow obstruction means 7 by a vortex phenomenon. , The process of flowing out from the outflow passage 8 is shown.

As shown in the embodiment of the present invention shown in FIGS. 2 and 3, in the aforementioned separation tank 5, blocks 10 each having a hollow body and having water passage holes 9 at the top and bottom are stacked vertically and horizontally to obstruct the flow. Means 7 are configured. In the example of FIG. 2 made of a regular cube and the example of FIG. 3 made of a hexagonal prism, both of the water passage holes 9 are formed.
Communicate with each other between the upper and lower blocks.

Regarding the mixed water that has passed through the water passage hole 9, the water passage hole 8 is determined by the amount of the mixed water, the diameter of the water passage hole 9 and the pitch.
And the vortex flow generated by the voids in the blocks 10 separates and traps suspended matter in each block 10. Furthermore, in the case of a cohesive suspension, the contact with the already deposited suspension also facilitates the capture of fine particles.

With respect to the inflow direction of the mixed water, the same eddy current phenomenon may occur even in the upward flow or the downward flow.

It should be noted that the shape of the water passage hole 8 may be any shape such as a circular shape or a rectangular shape so long as it produces a swirl with respect to the passing flow.
The shape is not limited. Also, the number of water passage holes in one block is not limited.

Regarding the washing, the suspended matter is removed and the suspended solids deposited in the block 10 are flowed down in the reverse direction with the effluent water after the separation or separate washing water, so that the concentrated flocs are successively removed. Is easily removed from the water passage hole 9, passes through the straightening plate 6 downward, and is then discharged from the discharge passage 11 (shown in FIG. 1).

If this invention is used in the previous stage of the existing sand filtration tank, the load of the sand filtration tank can be greatly reduced, and it also acts as a buffering function against the fluctuation of the turbidity of the water to be treated. Can last longer.

[0013]

As described above, the present invention is an excellent separation device for fine particles due to forced separation of fine particles by a completely new vortex and in addition to promotion of capture by contact with deposited fine particles. Also, the blocking of the device has the effect of facilitating inspection and maintenance.

[Brief description of drawings]

FIG. 1 is a processing system diagram showing this invention.

FIG. 2 is a perspective view of a flow inhibiting means having a hollow cubic shape that can be used.

FIG. 3 is a perspective view showing a similar flow inhibiting means for a hollow hexagonal prism.

FIG. 4 is a schematic vertical sectional view showing separation by a conventional vortex flow.

[Explanation of symbols]

 1 Water to be treated 2 Flocculant 3 Mixing tank 4 Pipe line 5 Separation tank 6 Rectifier plate 7 Flow obstruction means 8 Outflow path 9 Water passage hole 10 Block 11 Discharge path

Claims (1)

[Scope of utility model registration request] 1. A separation tank is made of a hollow body and water is passed through the upper and lower surfaces.
Insert the block with holes into the water passage holes of the upper and lower blocks.
By connecting and stacking up,
A solid-liquid separation device using a vortex flow.