JPS6032486B2 - Separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separation device for separating hot suction matter from a suction air flow path.

When separating the aspirate from the suction air flow path, the applicant has previously developed a device that separates the aspirate without breaking the negative pressure in the suction air flow path. A separation device is provided, which includes a liquid tank filled with water, which is passed through a chamber, and an inflator provided in a part where the liquid tank and the negative pressure chamber are connected.

In such a device, the centrifugal force of the inbella prevents water from flowing into the negative pressure chamber, and the aspirate is discharged from the negative pressure chamber into the liquid tank via the inbella. However, the above separation device had the following problems. The scum on the surface of the melt is sucked, water is sprayed onto the scum, and the scum is cooled and solidified.
The above separation device was used to separate scum and water from a suction airflow containing this solidified scum, injected water, and water vapor generated from this water. However, since the scum discharged into the liquid tank is at a high temperature, the water in the liquid tank reaches a high temperature of 90° to 95°C during continuous operation, and even higher temperature scum flows into this high-temperature water from the invera. Once released, it boils at the outlet of the invera and generates a large amount of steam. This steam causes the outlet of the invera to operate in a gas atmosphere, so that the centrifugal force of the invera does not work, and the high temperature water at the outlet of the invera flows back into the negative pressure chamber together with bubbles and steam. Moreover, the contact between this backflowing water and the high-temperature scum generates even more steam in the suction air flow path, and steam that exceeds the condensing capacity of the condensing device flows into the pipe line, causing a drop in negative pressure. This weakens the suction ability of scum from the moat surface. The present invention solves the above-mentioned conventional drawbacks, and aims to provide a separation device that can prevent the negative pressure in the negative pressure chamber from decreasing due to boiling caused by the high-temperature suction material.

In order to achieve the above object, the separation device of the present invention includes a negative pressure chamber conveyed to a suction device, a liquid tank conveyed to the negative pressure chamber,
An inbella arranged between the negative pressure chamber and the liquid tank and consisting of a rear shroud and a blade body provided on a surface of the rear shroud on the negative pressure chamber side, and a liquid that supplies cooling liquid to the inbella. The structure is composed of a child-synthesis device.

According to this configuration, the invera can be well cooled by the cooling liquid from the liquid supply device, and therefore, it is possible to reliably prevent the negative pressure in the negative pressure chamber from decreasing due to boiling caused by the high-temperature suction material. Hereinafter, an embodiment in which the present invention is applied to the separation of scum obtained by sucking scum on the surface of a molten metal will be described with reference to the drawings.

A negative pressure chamber 1 is maintained in a negative pressure state, and has a cylindrical side wall la, a funnel-shaped bottom wall lb, and a top coat lc covering the side wall la.

A suction device lotus port 2, which communicates with a suction device such as a vacuum pump, is closed in the side wall la. The upper wall lc is provided with a suction flow inlet 3 which is spaced apart from the scum on the surface of the molten metal and communicates with a suction head which injects water onto the suctioned scum. The bottom wall lb is continuous with a cylindrical discharge port 4, and the discharge port 4 closes below the water surface of the liquid tank 5 to form a communication portion 4a with the liquid tank 5 of the negative pressure chamber 1. An invera 6 is arranged in the lotus passage part 4a,
The impeller 6 is fixed to one end of a drive shaft 8 in a cylinder 7 that penetrates the side wall of the liquid tank 5, and is rotationally driven by a drive device via a pulley 9 at the other end of the drive shaft 8. The cylindrical body 7 is fixed to a support slope 101 on the side wall of the liquid tank 5, and the drive shaft 8 is rotatably supported by the cylindrical body 7 via a bearing.
The invera 6 includes a rear shroud 11 and a rear shroud 1.
The rear shroud 11 has a conical shape protruding toward the lotus passage portion 4a. The drive shaft 8 is fixed to the rear shroud 11. An annular plate 1 that covers the blade body 12 at a distance from the rear shroud 11 of the blade body 12 and the end on the reflection side.
3 is attached to the discharge port portion 4, and the annular plate 13 is provided with an annular slit 14 that closes at a radially intermediate portion of the inflator 6. An annular liquid supply chamber 15 is provided on the surface of the annular plate 13 opposite to the inflator 6 along the circumference of the discharge port 4. The liquid supply chamber 15 is filled with a cooling liquid (for example, cooling water). Liquid supply chamber 1
5 constitutes a liquid supply device together with the slit 14, and is connected to a liquid supply source via a pipe line. In addition, instead of providing the slits 14 in an annular shape as described above, the slits 14 may be provided at appropriate intervals in the longitudinal direction. Further, instead of providing the annular liquid supply chamber 15 as described above, the liquid supply device may be one in which a pipe line is directly connected to the slit 14. Next, the operation of the above configuration will be explained.

A suction airflow containing scum, water, and steam is sucked into the flow inlet 3
When the suction airflow flows into the negative pressure chamber 1, the suction airflow is decelerated due to the increase in the cross section of the flow path, so that only water vapor and air with a light specific gravity are suctioned into the suction device conveyance □2. The scum and water are separated from the suction airflow and fall to the discharge port 4, and due to the centrifugal action of the in-vera 6, the fallen scum and water are removed by the blades of the in-vera 1 without breaking the negative pressure in the negative pressure chamber 1. It passes between bodies 12 and is discharged into liquid tank 5. Liquid tank 5
The water inside is prevented from flowing into the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the vehicle.
During this time, the cooling liquid in the liquid supply V supply device 15 is discharged from the slit 14 into the invera 6, and the scum that has fallen into the discharge port 4 is cooled by the cooling liquid and then flows into the liquid tank 5. released. Therefore, even if the water in the liquid tank 5 becomes high temperature due to the scum discharged from the invera 6 during continuous operation, when the scum is discharged from the invera 6, it boils at the outlet of the invera 6 and the blade body 12. The occurrence of such problems is alleviated. Therefore, the invera 6 does not rotate in a gas atmosphere, and the centrifugal force of the invera 6 acts to prevent water, bubbles, water vapor, etc. from flowing back from the invera 6 into the negative pressure chamber 5. Therefore, there is no problem of boiling occurring in the negative pressure chamber 1 and lowering the suction force, and no backflow of scum occurs. As explained above, according to the present invention, since the liquid supply device that supplies the cooling liquid to the invera is provided, even if it is used to separate a high-temperature aspirate, the aspirate can be cooled from the liquid supply combination device. It can be cooled with liquid and discharged into a liquid tank.

This prevents boiling at the outlet of the inflator from lowering the negative pressure in the negative chamber.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view of a separation device, and FIG. 2 is an enlarged sectional view of the same portion. 1...Negative pressure chamber, 2...Suction device port, 3
...Suction distribution entrance, 4a...Communication ○,
5...Liquid tank, 6...Invera, 11...
...Rear shroud, 12...Blade body, 13...
...Annular plate, 14...Slit, 15...
...Liquid supply chamber. Figure 1 Figure 2

Claims (1)

[Claims] 1 A negative pressure chamber that communicates with the suction device, a liquid tank that communicates with the negative pressure chamber, a rear shroud and a surface of the rear shroud on the negative pressure chamber side that is arranged in the communication area between the negative pressure chamber and the liquid tank. 1. A separation device comprising: an impeller consisting of a blade body provided in the impeller; and a liquid supply device supplying a cooling liquid to the impeller.