JPS6028549B2 - Continuous centrifugal concentrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous centrifugal concentrator that can continuously separate stock solutions containing solids such as sludge generated from chemical plants, sewage treatment facilities, etc. into concentrated solids and clear water. It is something.

When processing a stock solution containing solids, it is necessary to separate the solids from clear water, i.e. solid-liquid, and an important issue at this time is how to concentrate the solids and efficiently separate the solid-liquid. Become.

Therefore, in conventional centrifugal concentrators, solid-liquid separation is performed by charging the stock solution into a vertical rotary cylinder whose upper end forms a closed section with an overflow weir and whose lower end is bottomed. In this method, centrifugal force is applied to the stock solution put into the cylinder to concentrate and deposit the solids on the periphery of the cylinder, while the clear water from which the solids have been separated is discharged overflowing from the upper end to separate the solids and liquids. It is something to do. However, in this case, the solids cannot be automatically discharged from the cylinder, so after stopping the supply of the stock solution, the rotation is slowed down and a skim pipe is inserted into the cylinder to suction it and the solids are discharged from the cylinder. was. As described above, conventional centrifugal concentrators operate in batches, with the process of supplying the stock solution and concentrating the solids at high speed, and the process of slowing down or stopping the rotation to discharge the solids, resulting in poor efficiency and unstable operation. It lacked sex. In view of the above points, in order to improve the efficiency of the device and stabilize the operation, the present invention is designed so that the solids in the cylinder can be discharged even during the undiluted liquid supply, so that solids can be continuously solidified. It is designed to allow liquid separation.

Embodiments of the present invention will be described in detail below based on the drawings.

In the drawings, reference numeral 1 indicates the outside of the cylindrical body, which is rotated with its axis in the vertical direction. The stock solution is subjected to centrifugal force within this outer cylindrical body 1 to separate solid and liquid. The bottom of the outer cylindrical body 1 forms a slanted circumferential wall la, which is formed so that the solid material A can easily slide upward. Outer cylinder body 1
End plates 2 and 3 are provided at both upper and lower ends of the board, and each end plate 2 and 3 is provided with an opening 4.5 in the center. A stock solution supply pipe 6 and a solid material withdrawal pipe 7 are inserted from the upper end opening 4.
Concentrated solid material A is discharged together with supply of the stock solution. Further, the lower end entrance portion 5 serves as an overflow weir for discharging the separated liquid. A circular guide plate 8 with a boss is provided below the tip of the undiluted solution supply joint tube 6 so as to rotate together with the outer cylinder, and the undiluted solution is received by this guide plate 8 and centrifugal force is applied to the outer cylindrical body. 1
is evenly distributed towards the inner wall of the Outer cylinder body 1 and guide plate 8
An inner cylindrical body 9 whose friction is enlarged toward the lower end opening 4 is provided between the cylindrical body 9 and the outer cylindrical body 1 so as to rotate together with the outer cylindrical body 1. The tube body 1 is formed in such a manner that it prevents the undiluted solution from being disturbed, and also allows solid matter to easily slide along the oblique peripheral wall of the inner tube body 9 and move to the bottom circumferential wall la of the outer tube body 1. 10 is a casing of the outer cylindrical body 1.

Since the present invention has the above-described configuration, the stock solution supplied from the stock solution supply V supply pipe 6 is evenly delivered toward the inner cylinder body 9 by the guide plate 8. The inner cylindrical body 9 handles the solid matter A without disturbing the flow of the undiluted solution in the outer cylindrical body 1 when supplying the undiluted solution.
Disturbance of the layers is prevented, and the solid matter in the inner cylinder 9 is moved toward the oblique peripheral wall la of the outer cylinder 1. Therefore, the residence time of the solids in the outer cylinder body 1 becomes longer, sufficient concentration is obtained, the solids slide on the oblique peripheral wall la of the outer cylinder body 1, migrate to the upper end of the outer segment body 1, and are transferred to the solid substance drawing pipe 7. It is sucked and discharged outside the outer cylinder body 1. On the other hand, the separated liquid from which solids have been separated is drained from the lower end opening 5 and discharged from the apparatus through the discharge port 11. Therefore, solid-liquid separation can be carried out continuously because it is hardly affected by disturbance of the stock solution when solids are discharged. The present invention is carried out as described above, and the stock solution is once received by the guide plate and supplied to the inner cylinder, and the solid material is transferred to the bottom of the outer cylinder by the inner cylinder. This prevents disturbance of the concentrated solids layer when the raw solution is supplied, and the solids are discharged from the upper end, and the separated liquid is discharged from the lower end, so the solids are sufficiently concentrated.On the other hand, the separated liquid is discharged when the solids are discharged. Since it is not affected by the effects of water, it is possible to perform solid-liquid separation with a high concentration rate continuously, improving the efficiency of the device and stabilizing the operation.

[Brief explanation of the drawing]

The drawings are cross-sectional views showing embodiments of the present invention. 1... Outer cylinder body, 2, 3... End plate, 4,
5... Opening part, 6... Stock solution supply connection tube,
7... Solid material drawing pipe, 8... Guide plate, 9.
...Inner cylindrical body.

Claims (1)

[Claims] 1. An outer cylindrical body having end plates with an opening formed in the center at both ends in the axial direction is provided so as to be rotatable around the axis with its axis in the vertical direction, and a concentric outer cylindrical body is provided on the radially inner side of the outer cylindrical body. An inner cylindrical body whose diameter is enlarged toward the lower end in the form of a shape, a stock solution supply pipe and a solid material withdrawal pipe arranged at the upper end opening, and a guide for sending the stock solution toward the inner cylinder body below the tip of the stock solution supply pipe. A continuous centrifugal concentrator characterized by the provision of a plate.