JPS581977B2 - Centrifugal "filtration" device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel centrifugal filtration device for filtering and separating solid particles from a liquid mixture containing solid particles such as muddy water or chemicals.

In general, filter presses are often used to filter and separate solid particles from mixed liquids.

However, in the case of this filter press, it was a batch type, the installation area was large, the initial cost was high, and there were problems with productivity.

Therefore, various centrifugal filtration devices capable of continuous filtration have been developed, but they have problems such as high initial cost and poor filtration efficiency (removal efficiency).

In view of the above, it is an object of the present invention to provide a centrifugal filtration device that is capable of continuous filtration, has low initial and operating costs, and has good filtration efficiency.

The gist of the present invention is to provide a centrifugal lacrimation device equipped with a furnace shell having a peripheral wall as an astringent surface, which rotates at high speed about a horizontal line along the bottom diameter and at a low speed about a center line. , the mixture is poured onto the diameter of the bottom of the spastic torso perpendicular to the axis of high-speed rotation, and a centrifugal warming effect is produced at that part, and the bottom of the spastic torso is placed along the axis of high-speed rotation. The mud is discharged from the furnace shell at both ends of the diameter.

Hereinafter, one embodiment of the present invention will be described based on illustrated examples.

FIG. 1 is a partially cutaway front sectional view of a centrifugal filtration device of the present invention, and FIG. 2 is a partially cutaway plan view thereof.

The first rotating shaft (high-speed rotating body) 1 as shown in FIG.
, supported by 6. It is installed horizontally.

Fixed shafts 99 are protruded above and below the band plate portion γ at the intermediate portion of the first rotating shaft 1 so as to be perpendicular to the axis, thereby forming a high-speed rotating body.

The center position of the furnace shell 12, 12 is fixed on the fixed shafts 9, 9 via the roller bearings 11, 11.
3 is fitted, and the filter cylinders 12, 12 are rotatably attached.

At this time, the filter cylinder may be provided only on one side. This filtration cylinder 12 has a filtration surface on a peripheral wall 15 and is tapered in diameter toward the upper opening.

In the example shown, it has a flat truncated semispherical shape with an upward opening.

Note that the bottom portion 14 does not necessarily have to be circular and may be an even regular polymorph.

A large number of small holes 16 are formed in the peripheral wall 15 of the filtration drum 12, and a filter cloth 1γ is attached to the inner peripheral surface so as to be replaceable.

Also. A dog bevel gear 18.
18 has been formed.

Note that, if necessary, a wire mesh with a small mesh may be used instead of the tear cloth 1γ.

A second rotary shaft (rotary drive body) 19 is rotatably supported on the left pipe portion 2 of the first rotary shaft 1 via a bush 2, and the large bevel gear is attached to the right end (on the filtration barrel side) A small bevel gear 21 is formed perpendicularly to the axis of 18 and capable of meshing.

This small bevel gear 21 is prevented from interfering with the first rotating shaft 1 by a rectangular notch 8 provided in the band plate portion 7.

In addition, pulleys 2 2 and 2 3 are attached to the left ends of the first rotation shaft 1 and the second rotation shaft 19, respectively.
A pulley 26 attached to the drive shaft 25 of the motor 24,
27.

On the other hand, a liquid introduction pipe 28 for introducing the mixed liquid is inserted into the pipe portion 3 on the right side of the first rotating shaft 1, and its tip is sealed with a shaft sealing member 29.

A liquid input tube 30 for inputting the mixed liquid with a bifurcated tip is protrudingly provided above and below the pipe portion 3, and the liquid input tube 30 has its tip connected to the front and back of the axial center of the filtration barrel 12, that is, The diameter of the filtration drum bottom 14 perpendicular to the axis of the first rotating shaft 1 (hereinafter referred to as "
It is possible to introduce the mixed liquid onto both ends of A (abbreviated as “orthogonal diameter”) through the upper opening.

Note that the liquid injection site may be only on one end of the orthogonal diameter A.

Next, the manner in which the centrifugal filtration device having the above configuration is used will be explained.

first. When the motor 24 is driven, the first rotating shaft 1 rotates at high speed via the pulleys 26 and 22, and the pulley
The second rotating shaft 19 also rotates via 2 7 and 2 3 .

At this time, if the mixed liquid is muddy water. 1st and 2nd rotating shaft 1 1
The rotation speed of 9 is. for example. 1000 rpm, 80 respectively
Set it to 0 rpm.

thus. The filtration cylinders 12 12 are rotated at high speed in the vertical direction, and the rotational force of the second rotating shaft 19 is transmitted from the small bevel gear 21 to the large bevel gear 21, so that each filtration cylinder 12
12 are horizontally rotated at low speed in mutually opposite directions.

At this time. The ratio of high speed rotation to low speed rotation is 100:10 ~
Set to 1.

On the other hand, the mixed liquid that has passed through the liquid introduction pipe 28 and the liquid input pipe 30. It is placed on both ends of the orthogonal diameter A.

At this time, the pair of lacrimal cylinders 12, 12 are rotating at high speed in the vertical direction, but the radius of rotation on the orthogonal diameter A becomes maximum, and the maximum centrifugal force acts on that part.

Also. As you move toward both sides, the vertical radius of rotation becomes smaller, so the centrifugal force becomes smaller. Both left and right ends B
, B', centrifugal force hardly acts.

Therefore. Centrifugal filtration action. Peripheral wall 15 near orthogonal diameter A
The filtrate is mainly discharged from the filter wall around the area.

In addition, even if the filtration cylinder 12 is turned downward in this area, the diameter of the filtration cylinder is reduced toward the upper opening and is subjected to the action of centrifugal force, so that the filtration clumps will not adhere to the inner circumferential surface of the peripheral wall and fall off. .

On the other hand, since the filter cylinders 12, 12 are horizontally rotating at low speed in opposite directions, the peripheral wall portions on the orthogonal diameter A of each filter cylinder 12, 12. It sequentially moves to the ends (on the diameter of the bottom part 14 of the punching trunk along the axis of the first rotating shaft 1) B and B'.

Therefore, as the filter barrel 12 rotates horizontally, the filter lumps formed on the inner circumferential surface of the peripheral wall at the perpendicular diameter A move sequentially to the ends B and B' where the centrifugal force is smaller, and the filter lumps in these areas The adhesion to the inner surface of the peripheral wall due to centrifugal force is lost and it falls.

In this way, the filter cake adhering to the inner circumferential surface of the peripheral wall of the filtration drum 12 is continuously discharged from the filtration drum 12 at a position separate from the filtrate.

In the above embodiment, the case where the bottom of the filtration drum 12 is circular is taken as an example, but if the bottom is a regular polygon, the filtration drum 12
It is desirable to intermittently rotate horizontally by an angle corresponding to the number of angles.

The centrifugal filtration device of the present invention has the above configuration,
Continuous operation is possible. In addition, since the structure is simple, the initial and operating costs are low, and since filtration is performed at the location where centrifugal force is the greatest, dewatering efficiency is also good.

for example. Compared to a filter press with the same capacity, the initial cost is about 1/10, and the water content when fine sand is recovered from muddy water is 45 to 50% with a filter press.
%, but with the device of this invention, it became 10 to 15%.

[Brief explanation of the drawing]

The figures show an example of the centrifugal filtration apparatus of the present invention, in which FIG. 1 is a partially cutaway front sectional view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a perspective view of the first rotating shaft. 1...First rotating shaft (high speed rotating body), 9...
... Fixed shaft, 12 ... Filtration cylinder, 14 ...
bottom. 15...peripheral wall, 16...small hole,
17...filter cloth, 18...large bevel gear,
19... Second rotating shaft (rotary drive body), 21...
...Small bevel gear, 28 ...Liquid introduction pipe, 30
・・・・・・Liquid input pipe.

Claims (1)

[Claims] 1. A filtration cylinder 12 whose bottom part is circular or even-numbered regular polygon, has a filtration surface on the peripheral wall 15, and whose diameter decreases toward the upper opening. High-speed rotating body 1 installed horizontally along its bottom diameter
It is rotatably attached to the front door overbody 12.
is connected to a rotary drive body 19 separate from the high-speed rotary body 1 so as to be able to rotate continuously or intermittently around the bottom center at a bottom speed independently of the high-speed rotary body 1, and further includes a front high-speed rotary body 1
A liquid injection pipe 30, which rotates integrally with the high-speed rotary body 1, is disposed on the diametrical end of the bottom of the door box, which is perpendicular to the axis of the door. Centrifugal filtration equipment.