JPH04281829A - Rotary disk type separating device - Google Patents

Abstract

PURPOSE:To simplify assembly and to allow the easy exchange of parts as well by adopting the constitution consisting in stacking liquid separating units consisting of disk-shaped inorg. flat plate membranes as filter elements and rotors. CONSTITUTION:The rotors 7-1 to 7-3 are disk-shaped and are fixed to a revolving shaft 6. An upper cap 1, the rotor 7-1, the liquid separating unit 3-1, the rotor 7-2, the liquid separating unit 3-2, the rotor 7-3, and a lower cap 2 are stacked in this order from above around this revolving shaft 6. The lower cap 2 and the upper cap 1 are fixed by means of bolts 9. An inflow path 11 for a liquid to be treated and a bearing 15 of the revolving shaft are provided on the upper cap 1. An outflow path 12 for the liquid to be treated and a hole 16 in which the revolving shaft passes liquidtightly are provided on the lower cap 2. The inorg. flat plate membranes 21 of the liquid separating units 3-1, 3-2 are constituted by providing a dense active layer 33 of a small pore size on, for example, one surface of a supporting layer 22 consisting of coarse ceramics having large pore sizes. Filtrate flow passages 13-1, 13-2 are provided in the membrane supporting plates 24.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating disk separation device configured to separate a filtrate from a liquid to be treated by passing the liquid through a disk-shaped inorganic flat plate membrane.

0002

[Prior Art] Traditionally, rotation has been used to separate the liquid to be treated into solid and liquid by flowing the liquid to be treated parallel to the surface of the filter medium and filtering by creating a shear force between the surface of the filter medium and the liquid to be treated. Disk type separators are known. In this device, a rotatable disk consisting of a disk-shaped filter element or a disk arranged between fixed filter elements is provided in a cylindrical outer case, and the liquid to be treated is attached to the disk-shaped filter. The filtrate is separated from the liquid to be treated through the filtrate.

0003

[Problems to be Solved by the Invention] However, in the rotating disk type separation device having the above-mentioned configuration, a plurality of disk-shaped filter elements, disks, and furthermore, a rotating shaft are arranged in order in a deep outer case. As a result, assembly was difficult. In addition, if some of the parts that make up the device, such as a disc-shaped filter element, are damaged during actual use, it is not possible to replace only the damaged parts; all parts must be removed from the outer case and the damaged parts must be replaced. There was a problem in that it had to be reassembled after being replaced, which was time-consuming.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a rotating disk type separation device having a structure that is easy to assemble and allows easy replacement of parts.

[0005]

[Means for Solving the Problems] The rotating disk type separator of the present invention fixes a disk-shaped inorganic flat membrane having an active layer to a membrane support plate in a liquid-tight manner, and a liquid to be treated is separated by the inorganic flat membrane. a filtrate passageway for taking out the filtrate after solid-liquid separation;
and a liquid separation unit having a liquid to be treated flow path leading from the front surface to the back side, and a top lid having a liquid to be treated inflow path or a discharge path for the liquid to be treated, or a bottom lid having a liquid to be treated inflow path. A plurality of solid-liquid separation chambers are formed between the solid-liquid separation chambers by liquid-tightly stacking the solid-liquid separation chambers between the solid-liquid separation chambers, and a rotor with a rotating shaft fixed at the center of the rotor is provided within the solid-liquid separation chamber. It is something.

[0006]

[Operation] In the above-mentioned configuration, the device can be configured by stacking the rotor and the liquid separation unit containing the inorganic flat plate membrane that forms the disc-shaped filter element, which eliminates the need to place them in the outer case in order as in the conventional case. Therefore, assembly and maintenance of damaged parts can be easily performed. In other words, when assembling, the device can be constructed by simply stacking the liquid separation unit and rotor alternately and then fixing them from above and below with the upper and lower covers, and when performing maintenance on damaged areas, the upper and lower covers can be removed. Maintenance can be performed by replacing only that part.

[0007] Furthermore, the active layer of the inorganic flat plate membrane for separating the liquid to be treated may be provided on only one side of the flat plate or on both sides. When provided on one side, it is preferable to configure a liquid separation unit by supporting two inorganic flat membranes at a certain interval so that the active layer is in contact with the liquid to be treated on both sides of the membrane support plate, and also provided on both sides. In this case, it is preferable to configure the membrane separation unit by supporting the inorganic flat membrane itself. Furthermore, by providing an inflow path and an outflow path for the liquid to be treated in each of the plurality of liquid separation chambers, it is possible to prevent the concentration of the liquid to be treated from changing from the upstream side to the downstream side. This is preferable because the membrane loads on the upstream and downstream sides can be made uniform.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram schematically showing the construction of an example of a rotating disk type separation apparatus of the present invention. In the example shown in Figure 1,
An example is shown in which disc-shaped liquid separation units 3-1 and 3-2 are disposed between a disc-shaped upper lid 1 and a lower lid 2. That is, centering around a rotating shaft 6 whose one end is connected to a drive mechanism 5 outside the device, from above the upper lid 1, a disk-shaped rotor 7-1 fixed to the rotating shaft 6, a liquid separation unit 3-1, and a rotating shaft 6. A disc-shaped rotor 7-2 fixed to the liquid separation unit 3-2,
With the disk-shaped rotor 7-3 fixed to the rotating shaft 6 and the lower lid 2 stacked in this order, bolts 9 are inserted from the upper lid 1 through a plurality of taps 8 cut on the same circumference of the lower lid 2. They are meshed and fixed to constitute the rotating disk type separation device of the present invention.

In addition to the holes through which the bolts 9 pass, the upper lid 1 is provided with a liquid inlet passage 11 serving as an inlet for the liquid to be treated, and a bearing 15 for the rotating shaft 6 is provided in the center. In addition to the tap 8, the lower lid 2 is provided with a to-be-treated liquid outflow path 12 that serves as an outlet for the to-be-treated liquid, and is provided with a through hole 16 in the center through which the rotating shaft 6 penetrates in a liquid-tight manner.

FIG. 2 is a diagram showing in detail the structure of an example of the liquid separation unit of the present invention. In this embodiment, the inorganic flat membranes 21 (21-1, 21-2) are constructed by providing a dense active layer 23 with a small pore size on one side of a support layer 22 made of ceramics with a large pore size and roughness. In the liquid separation unit shown in FIG. 2, a disk-shaped inorganic flat membrane 21 having the above-described structure
-1 and 21-2 are fixed at a constant interval to a disk-shaped membrane support plate 24 so that the active layer 23 is in contact with the liquid to be treated, and the inner end through which the rotating shaft 6 passes is provided with the liquid to be treated. The presser plate 2 is placed so that the
5 is set. Further, an O-ring 26 is provided on the circumference near the outer peripheral end of the membrane support plate 24 in order to seal the membrane support plate 24 with the upper and lower intermediate plates when stacked. Furthermore, filtrate channels 13 (13-1, 13-2) are provided within the membrane support plate 24. Note that the disc-shaped rotor 7 is preferably provided close to the inorganic flat membrane 21, so that the filtration surface is constantly refreshed.

FIGS. 3(a) and 3(b) are diagrams each showing the structure of an example of the rotor of the present invention. As the rotor of the present invention, a simple disc-shaped rotor as described above can be used satisfactorily, but as shown in FIG. Alternatively, a rotor 35 provided with a spiral convex portion 34 as shown in FIG. 3(b) is preferable because it increases the efficiency of stirring the liquid to be treated. In addition, if the rotor 36 has a cross-sectional shape in which the distance from the inorganic flat plate membrane 21 narrows as it approaches the center, or in other words, the thickness of the cross-section decreases as it approaches the tip, then the This is preferable because the stirring efficiency increases. Furthermore, in the above-described embodiment, in order to fix each member liquid-tightly between the upper cover and the lower cover, bolts were fixed by drilling holes inside each member and passing them through the holes, but the upper cover 1 and the lower cover It is also possible to provide a flange portion on 2, drill a plurality of holes in each of the flange portions, and fix with bolts and nuts. In this case, instead of the flange part, a plate material may be placed on the outside of each of the upper cover 1 and the lower cover 2 and fixed by having the same effect as the flange part.

In the rotating disk type separation apparatus of the present invention having the above-described structure, after the liquid to be treated is introduced into the apparatus from the liquid to be treated inflow path 11, the solid-liquid separation chambers 18 (18-1, 18-2, 18
In -3), the filtrate that has passed through the inorganic flat plate membrane 21 can be taken out of the apparatus from the filtrate channels 13-1 to 13-2, and the unfiltered liquid to be treated is discharged from the apparatus from the liquid to be treated outflow path 12. Thereby, the separation operation of the liquid to be processed can be completed.

FIG. 4 is a diagram schematically showing the structure of another example of the rotating disk type separation device of the present invention. In the embodiment shown in FIG. 4, the same members as those in the embodiment shown in FIG. The difference between the embodiment shown in FIG. 4 and the example shown in FIG. 1 is that, as shown in FIG. 2, an inorganic flat membrane 21 is coated on both sides of a supporting layer 22 made of coarse ceramics with large pores. It is constructed by providing a dense active layer 23 with a small pore diameter, and this inorganic flat membrane 21 is fixed to a single membrane support plate 24 to constitute a liquid separation unit. Note that the end face of the inner circumference of the inorganic flat plate membrane 21 is treated with a glaze to form a glaze layer to seal it. Furthermore, in order to fix the inorganic flat plate membrane 21 to the membrane support plate 24, the membrane support plate 24 is divided into two in the vertical or horizontal direction, the position where the inorganic flat plate membrane 21 is inserted is ground, and the inorganic flat plate is placed in the processed position. This can be achieved by inserting the membrane 21 and integrating the two-part membrane support plate 24. Furthermore, the difference from FIG. 1 is that intermediate frames 4-1, 4-2, 4-3 are provided between the upper lid 1, liquid separation units 3-1, 3-2, and lower lid 2. In the apparatus having the structure shown in FIG. 4, the structures of the inorganic flat membrane and the liquid separation unit can be simplified.

In the example shown in FIG. 1, the upper lid 1 or the lower lid 2 is provided with the liquid to be treated inflow passage 11 or the liquid to be treated outflow passage 12, but each of the solid-liquid separation chambers is provided with a liquid treatment liquid inflow passage and a liquid treatment liquid outflow passage. A processing liquid outflow path may be provided. In such a device, the concentrated liquid can be taken out from each of the solid-liquid separation chambers 18, so it is possible to prevent the concentration of the liquid to be processed from changing from the upstream side to the downstream side, and the concentration of the liquid to be treated can be prevented from changing from the upstream side to the downstream side. The membrane load on the downstream side can be made uniform. In the above embodiment, only liquid separation units are stacked, but the volume of the solid-liquid separation chamber 18 may be increased or stirring blades may be inserted. Thereby, the residence time can be adjusted, and high processing efficiency can be obtained depending on the type and properties of the liquid to be processed.

The present invention is not limited to the above-described embodiments, but can be modified and modified in many ways. for example,
In the above-mentioned embodiment, the inorganic flat plate membrane serving as a filter was fixed, and the rotor for stirring the liquid to be treated was fixed to the rotating shaft and rotated, but the unitization, which is a characteristic part of the present invention, can be maintained as is. Alternatively, the inorganic flat plate membrane may be fixed to a rotating shaft and the filtrate may be taken out to the outside via the rotating shaft.

[0016]

Effects of the Invention As is clear from the above explanation, according to the rotating disk type separator of the present invention, the device can be constructed by stacking a liquid separation unit containing an inorganic flat plate membrane and a rotor, and is different from the conventional one. Since it is not necessary to put the parts into the outer case in order as shown in the figure, assembly and maintenance of damaged parts can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the configuration of an example of a rotating disk type separation device of the present invention.

FIG. 2 is a diagram showing a detailed configuration of an example of a liquid separation unit of the rotating disk type separator of the present invention.

FIG. 3(a) is a diagram showing the configuration of an example of the rotor of the rotating disk type separation device of the present invention, and (b) is a diagram showing the configuration of another example of the rotor of the rotating disk type separation device of the present invention. It is a diagram.

FIG. 4 is a diagram schematically showing the configuration of another example of the rotating disk type separation device of the present invention.

[Explanation of symbols]

1 Top lid 2 Lower lid 3-1, 3-2 Liquid separation unit 6 Rotation axis 7-1, 7-2, 7-3 Rotor 11 Processed liquid inflow path 12 Processed liquid outflow path 13 Filtrate flow path 14 Processed liquid flow path 18 Solid-liquid separation chamber 21 Filtrate flow path 22 Support layer 23 Processed liquid flow path

Claims (1)

[Claims] Claim 1: A disk-shaped inorganic flat membrane (21) having an active layer (23) is liquid-tightly fixed to a membrane support plate (24), and the inorganic flat membrane (21) converts the liquid to be treated into a solid-liquid state. A liquid separation unit (3) having a filtrate passage (13) for taking out the separated filtrate to the outside and a liquid to be treated flow path (14) communicating from the front surface to the back side is connected to the liquid to be treated inflow path (11).
or an upper lid (1) having a liquid to be treated discharge passage (12) and a liquid to be treated (12), or a liquid to be treated inflow passage (11);
) by laminating it liquid-tightly between the lower lid and the lower lid.
A plurality of solid-liquid separation chambers (18) are formed between the solid-liquid separation chambers (18), and a rotor (7) having a rotating shaft (6) fixed to the center of the rotor is provided within the solid-liquid separation chamber (18). Rotating disk type separation device.