JPH05154308A - Precipitate separator - Google Patents

Abstract

PURPOSE:To provide a precipitate separator enhanced in the separation treatment capacity of a precipitate and not generating the clogging of a precipitate discharge port. CONSTITUTION:At least the lower part of a separation tank 11 is formed into an inverted conical shape and a precipitate discharge port 16 is provided to the lower end of the separation tank and a supernatant liquid emitting port 21 is provided to the upper end part of said tank. A vortex generator 13 is provided in the vicinity of the upper end part of the tank and a supply port 12 of a liquid to be treated is provided to the intermediate part between the vortex generator and a discharge port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating a precipitate used for separating a precipitate dispersed or suspended in a liquid to be treated, for example, as a waste liquid treatment or water treatment in a factory.

[0002]

2. Description of the Related Art Heretofore, a precipitation separation device has been mainly used in this type of device. Precipitation separators exclusively use the function of natural precipitation due to the specific gravity of the precipitates.In order to ensure separation, a separation wall that separates the supernatant from the precipitates is provided in the separation tank, and An aggregator is added. Further, since it is known that the precipitates collide with each other by collision and increase the specific gravity, a means of providing a collision wall for the precipitates in the separation tank is adopted.

Japanese Examined Patent Publication No. 49-46822 is a typical example thereof, in which a conical upper wall 2 and a lower wall 3 are joined together to form an abacus ball-shaped tank body. 1, the upper wall 2 is provided with a plurality of inner walls 4, 4 and 4 formed in a similar shape to the upper wall 2 at intervals so that flow-down passages 5, 5 and 5 for the liquid to be treated are provided.

According to this, the inner wall 4 and the lower wall 3 serve as collision walls, and while the liquid to be treated descends in the downflow paths 5, 5, 5, the precipitate collides with the inner wall 4 or other precipitates. It collides with objects and collects in a pseudo manner to increase the specific gravity.

The innermost inner wall 4 serves as a separating wall, and the inner surface thereof serves as an ascending path 6 for the supernatant liquid to the discharge port 7. The supernatant liquid is separated from the precipitate, and the descended precipitate is collected at the lower end. ,
It is usually discharged from the discharge pipe 8 and a pump is connected to the discharge pipe 8 for discharging.

[0006]

According to the conventional settling separator as described above, since the precipitate should not be lifted up together with the supernatant liquid to the ascending path 6 at the lower end of the descending path 5, the descending path is prevented. It was necessary to slowly drop the liquid to be treated in No. 5, and there was a limit to the supply amount of the liquid to be treated, that is, the separation and treatment capacity of the precipitate.

At the lower end, since the liquid to be treated is in a quiescent state where it hardly flows, solid precipitates collected at the lower end are bound to each other and solidify to form a bridge, so that the lower end is discharged. There was a problem that the outlet was clogged and the precipitate could not be discharged, causing a trouble.

The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a depositing device which has a large ability of separating and treating deposits and does not clog the outlet of the deposits.

[0009]

In order to achieve the above object, the present invention forms an inverted conical shape at least below the upper end portion of a separation tank, and has a sediment discharge port at the lower end of the separation tank. , The supernatant liquid discharge port is provided at the upper end, the vortex generator centered at the center is provided near the upper end of the tank, and the liquid to be treated is provided at an intermediate portion between the vortex generator and the discharge port. A supply port was provided to constitute a precipitate separating device.

[0010]

According to the above construction, when a vortex is generated in the liquid to be treated in the separation tank by the vortex flow generating device, at least the lower part of the separation tank has an inverted conical shape. At the same time as the substance falls due to being swirled in the vortex, it is pushed out so as to be sucked into the discharge port, and the supernatant liquid is discharged from the discharge port.

Since the supply port for the liquid to be treated is provided in the intermediate portion between the vortex generator at the upper end of the separation tank and the discharge port at the lower end, the liquid to be treated is supplied from the supply port into the separation tank. Then, it immediately receives the descending action, does not reach the height of the vortex generator, and the separation is performed below the vortex generator.
The liquid to be treated does not float to the discharge port while being mixed with the precipitate.

The vortex generator and the supply port are set at such an interval that the precipitate does not float upward.

By the principle of the cyclone, the precipitate collects under the separation tank, but the precipitate does not form a bridge due to the stirring action of the vortex. Then, not only the precipitates collide with each other, but also collide with the peripheral wall of the separation tank, and as a result of quasi-collection and increase in specific gravity, the separation action of the cyclone increases
The precipitate is sucked into the discharge port as a form that is easily discharged.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment, in which the precipitate separating device is in the form of a cyclone, and is vortexed into the liquid to be treated supplied from the supply port 12 to the separation tank 11. The eddy current generator 13 for causing

The separation tank 11 comprises a lower wall 15 and an upper wall 1.
In order to operate the cyclone principle, the lower wall 15 is formed as an inverted conical peripheral wall, and the discharge pipe 17 of the precipitate is connected to the discharge port 16 at the lower end. Further, the upper wall 17 is formed in a conical shape, and a cylindrical body 19 is projectingly provided on the upper end of the conical shape.
A discharge port 21 for the supernatant is provided in the. And the upper wall 1
7 and the lower wall 15 are connected to each other by bolting to form a piece.

The supply port 12 is provided by opening the front end of an introduction pipe 23 for the liquid to be treated, and its position is above the discharge port 16 so that the liquid to be treated is not discharged untreated. In addition, it is below the vortex generator 13 so that the precipitate does not float up.

The introduction pipe 23 is penetrated through the side portion of the discharge pipe 17 and is bent inside to pass through the center of the discharge pipe 17,
It is erected at the center of the separation tank 11. However, it may penetrate under the discharge pipe 17.

A valve 25 and a suction pump 27 are connected to the discharge pipe 17, and the liquid to be treated is sent to the introduction pipe 23 by a pump. 29 is a valve.

In the vortex generator 13, a nozzle 31 for jetting water is penetrated through the lower wall 15. The nozzle 31 is oriented slightly inward with respect to the tangential direction of the circle of the lower wall 15. There is. Air may be ejected instead of water.

When water is ejected from the nozzle 31, a vortex centering on the center of the separation tank 11 is generated in the liquid to be treated due to the momentum, and since the separation tank 11 has an inverted conical shape, the vortex is generated as it goes downward. As the force increases, the precipitates collide with each other or with the lower wall 15 to quasi-assemble and increase the specific gravity to gather at the lower end, and the swirl extends into the discharge pipe 17 without forming a bridge. Along with the action of the pump 27, it is sucked into the discharge port 16. The suctioned precipitate is discharged from the discharge pipe 17
It is sent to the sludge storage tank and finally put on a dehydrator for processing.

In the separation tank 11, a suction action occurs in the central portion, but a levitation action occurs in the peripheral portion, but since water is jetted from the nozzle 31 in the peripheral portion of the separation tank 11, there exists. In, so to speak, there is a curtain of water. Therefore, the vortex generator 1
Below 3, the precipitate is prevented from being rolled up, and thus the swirl generator 13 by ejecting water from the nozzle 31 has an extremely large precipitate separation capability. Then, the supernatant liquid is diluted and discharged from the discharge port 21, and the treated water is sent to the discharge water tank.

FIG. 3 shows another embodiment. In the separation tank 11, the lower half is formed in an inverted conical shape, the upper half is formed in a cylindrical shape, and the lower end of the cylindrical portion is formed. A vortex generator 13 is provided, and a discharge port 21 is provided at the upper end. Also,
The introduction pipe 23 is inserted from above and the supply port 12 is opened at the lower end thereof.

[0024]

As described above, according to the present invention, there are the following excellent effects.

1) The separation treatment of the precipitate is forced to settle by the principle of cyclone, rather than by spontaneous fall due to the specific gravity of the precipitate, and the collision of the precipitates with each other and the peripheral wall of the separation tank Separation capacity is very large, because the cyclone principle is promoted along with the increase in specific gravity due to collisions.

2) Due to the principle of the cyclone, not only the discharge action is exerted on the discharge port but also the bridge phenomenon in which the precipitate is solidified by the stirring action of the vortex generator is eliminated, so that the discharge port is not clogged and the precipitate is Trouble that cannot be discharged can be prevented.

3) It is not necessary to provide a partition wall in the separation tank, and the structure can be simple and the cost can be reduced.

In the case where the eddy current generating device is constructed by projecting the nozzle for ejecting water from the peripheral wall of the separation tank in a substantially circumferential direction (Claim 2), a water curtain is formed at the peripheral portion of the separation tank. By being able to prevent the floating of the precipitate, the separation ability is particularly increased.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a precipitate separation device as viewed from the front.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view showing another embodiment.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 11 Separation tank 12 Supply port 13 Vortex generator 16 Discharge port 21 Discharge port 31 Nozzle

Claims (2)

[Claims] 1. A separation tank is formed in an inverted conical shape at least below the upper end thereof, and a discharge port for deposits is provided at the lower end of the separation tank, and a supernatant liquid discharge port is provided at the upper end.
A vortex generator centering on the center of the tank is provided near the upper end of the tank, and a supply port for the liquid to be treated is provided at an intermediate portion between the vortex generator and the discharge port. .. 2. Separation of precipitate according to claim 1, wherein the vortex flow generating device is constituted by projecting a nozzle for ejecting water from the peripheral wall of the separation tank in a substantially circumferential direction. apparatus.