JPS63252519A - Rotary disc type separation device - Google Patents

Abstract

PURPOSE:To make the structure of a whole device compact, reduce the investment cost and retain a high filtering efficiency by providing a liquid feed means on a rotary disc or a rotating shaft inside the caseing of the device. CONSTITUTION:A liquid feed means of provided on a rotary disc or a rotating shaft inside the casing of a device. For example, a plurality of rotating discs 1 mounted on a rotating shaft 2 are constituted respectively of rotary disc- shaped filter elements, and infiltrate permeating the filtering section is discharged as shown by an arrow mark (a) through the hollow section inside the rotating shaft 2. Further, a plurality of chambers 7 are divided with partition walls 6 inside casing 5, while an impeller 4 as a liquid feed means is mounted on the rotating shaft section located in a flow channel 9 narrowed by the partition wall 6. As a result, the structure of the whole device is made compact to reduce the investment cost, and a high filtering efficiency can be retained.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a rotating disk type separation device.

(Prior art) In recent years, a solid-liquid separation method has been developed in which the liquid to be treated is passed parallel to the surface of the filter medium, a shearing force is generated between the surface of the filter medium and the liquid to be treated, and the liquid to be treated is concentrated by filtration. For example, rDe
salination, 35 (1980) No. 115
~128 pages” (Netherlands, Elsevier Sc.
ientific Publishing Co.)
proposed as described in .

Various types of rotating disk type separation devices have been known as separation devices that utilize shearing force between the filtration surface and the liquid to be treated. (Japanese Patent Application Laid-open No. 61-25607,
-138505, Japanese Patent Application Laid-Open No. 61-181503), the filtration element and the disc are installed alternately, one of them is fixed, and the other is rotated, thereby creating a gap between the turbulent flow of the liquid to be treated and the filtration element. Types that generate shearing force (``
Current status and issues of dynamic filters,” Chemical Equipment, 198
June 5th issue, pp. 72-77; Jitsukai Sho 61-15900
No. 3) etc. are known.

(Problems to be Solved by the Invention) However, in the conventional rotating disk type separator, a pump is installed outside the device as a liquid feeding means to pressurize and feed the liquid to be treated from outside the device into the device. ing. When pumping a large amount of liquid to the separation device under increased pressure, the pump becomes large and
Additionally, since large-diameter pipes are used for the piping between the pump and the separator, there are problems with the large filling volume of the liquid to be treated, including the internal space of the separator, and the problem of high equipment costs. Not only that, but the liquid to be processed, which becomes highly viscous due to separation and concentration, is pumped into the separator equipped with a large number of discs, resulting in a pressure distribution within the separator, making it difficult to maintain the optimum pressure. As a result, there is a problem that the filtration efficiency decreases.

(Means for Solving the Problems) According to the present invention, as shown in FIG. It is characterized in that the liquid feeding means 4 is installed on the rotating disk 1 and/or the rotating shaft 2 and is provided inside the device outer casing 5.

According to the present invention, it is preferable to provide liquid feeding means between the plurality of rotating disks and/or on each rotating disk.

As the liquid feeding means, a known suitable means such as an impeller or a screw can be provided on the rotating shaft, and feeding blades can be provided on the surface or outer peripheral surface of the rotating disk.

(Function) According to the present invention, by installing the liquid feeding means 4 on the rotating disk 1 or the rotating shaft 2 and providing it in the separation device, the liquid to be treated is transferred into the separating device by the rotation of the rotating shaft 2. be drawn in. This eliminates the need to provide a liquid feeding means such as a pump outside the apparatus, and the filling volume of the liquid to be treated can be reduced. Furthermore, by providing the liquid feeding means 4 on each rotating disk 1 or on the rotating shaft 2 between each rotating disk 1, even if the number of rotating disks 1 increases, the pressure distribution within the separation device can be maintained. The optimum pressure can be maintained and high filtration efficiency can be maintained.

(Embodiment) FIG. 1 shows a first embodiment of the present invention. In the rotating disk type separator shown in FIG. 1, a plurality of rotating disks 1 mounted on a rotating shaft 2 are each composed of a disk-shaped filter element. Each disc-shaped filter element rotates together with the rotating shaft 2, and the hollow rotating shaft 1 is arranged so that the filtrate that has passed through a part of the filter is discharged as shown by arrow a through the hollow interior of the rotating shaft 2. Connection is fixed.

A plurality of chambers 7 are provided inside the vertical cylindrical outer box 5 of the separation device, separated by a partition wall 6 .

A rotating shaft 2 extends vertically inside the outer casing 5, and its both ends are penetrated through the outer casing end wall 5a, and are rotatably supported in the outer casing end 5a by suitable seals and bearings 8 in a fluid-tight manner. A motor 3 is connected to the upper end of the rotating shaft 2 so as to drive it.

A rotating disk 1 constituted by a disk-shaped filter element connected and fixed on a rotating shaft 2 is positioned to be rotated in each chamber 7, and a rotating disk 1 is positioned in a flow path 9 narrowed by a partition wall 6. An impeller 4 is installed on the shaft as a liquid feeding means.
is attached, and as the rotating shaft 2 rotates, the liquid to be treated is fed from the inlet 10 of the outer casing 5 as shown by the arrow C, and the filter medium surface 11 of the disc-shaped filter element is rotated as shown by the arrow C. The filtrate is separated and the concentrated concentrate flows through the outlet 12 as shown by arrow d.
Sent from

FIG. 2 shows another embodiment of the present invention, in which the same parts as shown in FIG. 1 are denoted by the same reference numerals.

In the example shown in FIG. 2, a plurality of annular filter elements 15 are attached to the inner circumferential wall 16a of the double wall 16 of the outer casing 5 at vertically spaced positions, and each annular filter element 15 is attached to a portion of its filter. It is connected and fixed to the inner circumferential surface 16a of the double wall 16 so that the filtrate that has passed through the double wall 16 is discharged as shown by arrow a through the inside of the double wall 16.

FIG. 3 shows an example in which a spiral blade 21 is attached to the outer periphery of the rotating shaft 2 as a liquid feeding means to form a feed screw.

FIG. 4 shows an example in which inclined blades 22 are attached to the outer circumferential surface 1a of the rotating disk 1 as liquid feeding means.

FIG. 5 shows an example in which an impeller 23 is provided on the surface of the rotating disk 10 as a liquid feeding means.

(Effects of the Invention) According to the present invention, there is no need to provide a liquid feeding pressure boosting means such as a horn on the outside of the outer case of the separation device, the structure of the entire device becomes compact, equipment costs can be reduced, and the The filling volume is reduced, eliminating the occurrence of pressure distribution within the device,
It is possible to maintain the optimum pressure and maintain high filtration efficiency.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing one embodiment of a rotating disk type separation device according to the present invention, Fig. 2 is a schematic diagram showing another embodiment of the invention, and Figs.
The figures are schematic diagrams showing various embodiments of the liquid feeding means. 1... Rotating disk 2... Rotating shaft 3... Motor 4.21.22.23... Liquid feeding means 5.
...Outer box 6...Partition wall 7...Room diagram 1

Claims (1)

[Claims] 1. In a rotating disk type separation device in which a rotating shaft to which a rotating disk configured by a disk-shaped filter element or a disk arranged between fixed filter elements is attached is driven by a motor, the liquid feeding means is A rotating disk type separation device, characterized in that it is installed on the rotating disk and/or the rotating shaft 2 and provided inside a device outer casing.