JP3078621B2 - Multi-function filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional filter capable of performing two or more functions of stirring, washing, drying, discharging, crystallization, and filtering with a single machine.

[0002]

2. Description of the Related Art Conventionally, stirring, washing, drying, discharging, crystallization,
Multifunctional filters having more than one function in filtration are used. In this multi-function filter, various processes can be processed by a single machine, so that contamination and oxidative deterioration due to sample transfer can be prevented, product quality can be improved, and manufacturing processes and equipment can be simplified. There is a big feature.

[0003]

In recent years, there has been an increasing demand for applying the above-mentioned multifunctional filter to various fields, and particularly in a fine chemical plant, there has been an increasing demand for using the multifunctional filter. . However, if a conventional multi-function filter is used as it is in a fine chemical plant, the conventional multi-function filter is usually made of metal such as stainless steel. Is inferior,
Further, there is a problem that mixing of metal ions is inevitable.

[0004] In order to solve this problem, it is conceivable to apply Teflon lining to all members constituting the multifunctional filter. However, in the case of vacuum treatment, peeling may occur during drying after treatment, or slurry or powder may be removed. There was a problem that abrasion due to was large. It is also conceivable to apply glass lining to all the components that make up the multifunctional filter.However, it is difficult to produce sharp corners, so that the cake layer cannot be scraped off and there is a risk of abrasion during powder agitation. There was a problem. Further, it is conceivable that all the members are made of ceramics, but it is impossible to manufacture them, or it is expensive and practically impossible.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a multifunctional filter which is excellent in corrosion resistance and abrasion resistance and does not contain metal ions.

[0006]

According to the present invention, there is provided a multifunctional filter comprising: (a) a container portion; and (b) a filter cloth disposed on a spacer provided on a bottom plate at the bottom of the container portion. A filtration unit provided with a ceramic porous body, (c) an impeller shaft rotated and moved up and down by a driving unit provided outside the container unit, an impeller arm attached to the plurality of impeller shafts, and an impeller arm attached to the impeller arm. At least one
And a stirrer unit consisting of individual rakes.
In a multifunctional filter having two or more functions of drying, discharging, crystallizing, and filtering, a glass lining is provided on an inner surface of the container, an impeller shaft and an impeller arm of the stirring blade, and a bottom plate surface of the filter. The rake of the stirring blade part is made of ceramics,
When the method of mounting the ceramic rake connects the direction of the impeller arm and the outer end of the cake scraping surface of each rake, the angle between the impeller arm direction and the cake scraping surface of each rake is defined by the cake side surface. For removal,
It is characterized in that it is configured so that it becomes larger as it goes from inside to outside, and in the case of taking out the cake at the center, it becomes smaller as it goes from inside to outside.

[0007]

In the above-described configuration, among the members of the multifunctional filter, predetermined members are glass-lined, and since the predetermined members are made of ceramics, all the members are Teflon-lined or glass-lined. And the above-mentioned problem when all the members are made of ceramics is eliminated, high corrosion resistance,
A multifunctional filter having abrasion resistance and free of metal ions can be obtained.

[0008]

FIG. 1 is a view showing the overall structure of a multifunctional filter according to the present invention. FIG. 1 (a) is a front view showing a partial cross section, FIG. 1 (b) is a side view thereof, FIG. 1 (c) shows a plan view thereof. In the example shown in FIG. 1, reference numeral 1 denotes a container portion made of a metal can made of stainless steel or the like, and a slurry supply port 2 and an inspection window 3 are provided at the upper center of the container portion 1. A discharge port 4 for discharging the treated slurry or the like from the inside of the container 1 to the outside is provided on a side surface of the container 1, and a heating jacket 5 used for drying is provided.
Is provided. Further, a nozzle 6 for supplying cleaning water into the container 1 is provided in the container 1.

At the bottom of the container 1, a filtration unit 11 is provided in a liquid-tight manner. In the present embodiment, the filtration unit 11 includes a bottom plate 12.
The filter cloth 14 is provided on the upper side via a spacer 13. The bottom plate 12 is provided with a pin hole 12a through which a pin for fixing the spacer 13 and the filter cloth 14 is fixed, and a flange 12b is provided in the peripheral portion thereof. Is configured to be able to be discharged from the filtrate discharge port 12d to the outside through a filtrate passage 12c formed between the liquid discharge port 12c and the liquid discharge path 12c. It is preferable to use a Teflon spacer as the spacer 13 because better performance can be obtained in terms of corrosion resistance. Furthermore, in the present embodiment, the spacer 13 and the filter cloth 14 are arranged on the bottom plate 12 to constitute the filtration unit 11, but a porous ceramic plate may be used instead of the spacer 13 and the filter cloth 14.

A stirring blade 21 is provided in a liquid-tight manner at an upper portion of the container 1 and through the opening 1a. In this embodiment, the impeller 21 is provided with an impeller shaft 22 provided in the opening 1a in a liquid-tight and rotatable manner, and two impeller arms 23 provided at right angles to the end of the impeller shaft 22 in the container 1. -1, 23-2, a plurality of rakes 24 attached to the impeller arms 23-1, 23-2, and a drive unit 2 provided on the upper part of the container unit 1 of the impeller shaft 22 for rotating and raising and lowering the impeller shaft.
5. Although not shown in FIG. 1, a Teflon bellows may be provided on the outer peripheral portion of the impeller shaft 22 in the container portion 1. In the present embodiment, the rake 24 having a predetermined shape is attached to the impeller arms 23-1 and 23-2 by a predetermined method. The details will be described later. The impeller shaft 22 and the impeller arms 23-1 and 23-2 are generally mounted at a right angle, but the angle of downward or upward with respect to the impeller shaft while maintaining the balance accompanying the rotation of the impeller arm. It is also possible to fix it by holding it.

What is important in the present invention is the selection of each member constituting the above-described multifunctional filter, and the present invention can be achieved by limiting the selection. That is, in the embodiment shown in FIG. 1, not only the entire inner surface of the container portion 1, that is, the inner surface of the can body but also the opening 1 a, the slurry supply port 2, the inner surface of the inspection window 3, and the outer peripheral surface of the impeller shaft 22 of the stirring blade portion 21. Glass lining is applied to the entirety, the entire outer peripheral surfaces of the impeller arms 23-1, 23-2, and the entire surface of the bottom plate 12 of the filtration unit 11, and the impeller arms 23-1, 23-1,
It is important that the rake 24 attached to 23-2 is made of ceramics. As a method of glass lining, a conventionally known method can be used, and for example, a glass lining method by thermal spray coating disclosed in JP-A-62-44566 can be suitably used.

In the multifunctional filter having the above-described configuration,
Each function of stirring, filtering, washing, drying, discharging and crystallization can be achieved by a single filter. Hereinafter, each function of the multifunctional filter having the above-described configuration will be briefly described with reference to FIGS. First, the stirring function is shown in FIG.
As shown in (a), the slurry supply port 23 is
This is achieved by supplying the slurry via the controller, driving the drive unit 25 to rotate the impeller arms 23-1 and 23-2, and rotating or raising and lowering the rake 24 having a special shape. As shown in FIG. 2 (b), the filtering function is achieved by passing the slurry in the container unit 1 through the filtering unit 11 by gravity or by pressurizing the inside. At this time, it is not necessary to rotate the impeller arms 23-1 and 23-2, but if a dense cake layer is likely to be formed near the surface of the filter cloth 14 of the filtration unit 11, the impeller arms 23-1 and 23-2 are moved. The cake may be scraped off with the rake 24 by rotating the rake 24.

As shown in FIG. 2 (c), the dewatering function is performed by rotating the impeller arms 23-1 and 23-2 in the container portion 1 with the bottom surface of the rake 24 in contact with the slurry surface. This is achieved by squeezing the slurry using the R-shaped portion of the rake 24 by gradually lowering it. As shown in FIG. 2D, the drying function is achieved by circulating hot air through the jacket 5 through the cake on the filtering unit 11 in the container unit 1 or by reducing the pressure in the container unit 1. . Fig. 2
As shown in (e), impeller arms 23-1, 23
2 is rotated to move the cake in the container portion 1 to the outer peripheral portion by the rake 24, and is taken out from the outlet 4 to the outside. By changing the method of attaching the rake 24 to the impeller arms 23-1, 23-2, it is possible to collect the cake at the center of the container part 1, in which case a discharge port is provided at the center of the container part 1. Just take the cake out.

FIG. 3 is a diagram showing the configuration of another example of the multifunctional filter of the present invention. In the example illustrated in FIG. 3, the same members as those in the example illustrated in FIG. The example shown in FIG. 3 differs from the example shown in FIG. 1 in that the impeller shaft 22 is not glass-lined, but instead has one end for covering the entire impeller shaft 22 existing in the container part 1. 1 opening 1a
Are fixed by a mechanical seal structure and the other ends are impeller arms 23-1, 2-1, 2 of the impeller shaft 22.
The point is that a Teflon bellow 31 fixed to a base connected to 3-2 is provided to maintain the corrosion resistance of the impeller shaft 22. Here, the necessity of the Teflon bellows 31 is that when adjusting the height of the rake 24, the Teflon bellows 3
This is because 1 must expand and contract. In the example shown in FIG. 3, the impeller shaft 22 need not be provided with a glass lining, but it goes without saying that the presence of the glass lining can further improve the corrosion resistance.

FIG. 4 shows the shape of the rake 24 used in the multifunctional filter of the present invention. FIG. 4 (a) is a plan view and FIG. 4 (b) is a front view. The rake 24 used in the multifunctional filter of the present invention includes a bottom surface 41 and a boss portion 42.
And the impeller arm 23 embedded in the boss portion 42
A rake mounting portion 46 comprising a metal shaft 43 used for mounting on -1 and 23-2, and a cake scraping surface 44 rising in an L-shape at an acute angle with respect to the bottom surface 41.
And a cake leveling surface 45 that rises in an R shape with respect to the bottom surface 41 on the side opposite to the cake scraping surface 44 with respect to the bottom surface 41. It is preferable that the upper end surface 44a of the cake scraping surface 44 and the upper end surface 45a of the cake smoothing surface 45 be inclined as shown in FIG. 4 because the flow of the cake is improved. Further, the cake leveling surface 45 may be formed of a surface facing in two directions as shown in FIG. The ceramics constituting the rake 24 include partially stabilized zirconia, alumina,
Silicon carbide, silicon nitride, aluminum nitride, or the like can be used.

The thickness of the bottom where the cake leveling surface 45 is present is preferably 5 to 50 mm, and the boss 42 is preferably tapered from the base to the upper end. When the nut at the upper end of the metal shaft 43 embedded in the boss portion 42 is screwed to the impeller arms 23-1, 23-2, the cake scraping surface 44 and the cake leveling surface 45 have a predetermined shape. It is necessary to adjust in advance so as to face the direction. The shape of the cake 24 is not limited to the shape shown in FIG. 4, and other shapes can be suitably used. FIG. 5A to FIG.
It is shown in (c). As shown in FIGS. 5A to 5C, in each case, if the predetermined cake scraping surface 44, the cake leveling surface 45, and the rake attaching portion 46 exist, the rake 24 of the present invention can be obtained. it can.

A rake 2 made of ceramics having the structure described above.
According to No. 4, the weight and cost can be reduced, and the powder hardly remains on the upper surface. Therefore, the powder can be easily washed away by the cleaning spray. In addition, since the cake scraping surface 44 rises in an L-shape with respect to the bottom surface, a spiral flow is generated at the time of stirring, and the effect of stirring is increased. Furthermore, since ceramics are used, it is possible to obtain an integrally molded product with a complicated shape, and because the weight on the impeller arm is small, the glass lining applied to the surface of the impeller arm due to bending can be removed. Less likely to happen. Furthermore, when the combination of the boss portion 42 and the metal shaft 43 is used as the rake attachment portion 46, the strength can be increased, and the wall thickness of the scraping surface can be reduced.

FIGS. 6 and 7 are views showing a method of attaching the rake 24 to the impeller arms 23-1 and 23-2 in the multifunctional filter according to the present invention. FIG. Numeral 7 shows the case where the cake is taken out from the center. First, in both the case of taking out the cake side shown in FIG. 6 and the case of taking out the center shown in FIG. 7, FIG.
As shown in (a), a plurality of rakes 2 are provided for impeller arms 23-1 and 23-2 having angles different from each other by 90 °.
4, the mounting angle is made different depending on the mounting position, and it is screwed and detachably arranged.

That is, in the case of taking out the cake side surface shown in FIG. 6, the rotation center of the impeller arm and the outer end portion 44a of the cake scraping surface 44 are connected as shown in FIG. The angle θ between the connecting straight line and the cake scraping surface 44 is set such that the angle θ gradually increases from the inside to the outside rake 24.
Note that in the example shown in FIG.
No. 4 does not necessarily follow the above-described rules because it is necessary to arrange the part 44b inside the cake scraping surface 44 so as to coincide with the center of the container part 1 so that the cake does not remain in the center part. . Note that the cake scraping surface 44 may be constituted by a curve. In this case, a straight line connecting the ends of the curve serves as a reference when determining θ. Also,
In the case of taking out the cake at the center shown in FIG. 7, unlike the case of taking out the cake side shown in FIG. 6 described above, as shown in FIG. It is attached so that it gradually gets smaller as you go outside. Further, in any of the examples, in the rotation locus of the plurality of rakes 24 attached, the inner end portion 44c of the cake scraping surface 44 of the outer rake 24 and the outer end portion of the inner rake 24 scraping surface 44 of the rake 24. 44b
Need to be arranged so as to have an overlap of 1 mm or more, preferably about 1/5 of the length of the scraping surface 44 of the rake 24.

6A and FIG.
(A) Impeller arms 23-1, 23 in medium rotation direction a
-2, the scraping surface 4 of the rake 24 is rotated.
By the function of 4, the cake can be suitably moved to the outer periphery in the case of taking out the cake side face shown in FIG. 6, and the cake can be moved to the center part in the case of taking out the cake center shown in FIG. On the other hand, at the time of filtration, by rotating the impeller arms 23-1 and 23-2 in the rotation direction b and gradually lowering them, the cake surface is flattened by the R-shaped cake leveling surface 45, and the cake surface is flattened. Can be held down.

According to the rake mounting method of the present invention described above, it is possible to improve the powder discharge performance and, as a result, to reduce the number of rakes. Can be made less likely to form a bridge. Further, since the present invention can be achieved only by changing the mounting angle of the rake without changing the shape of the angle rake, the rake shape can be shared and the cost can be reduced.

The present invention is not limited to the above-described embodiment, but can be variously modified and changed. For example, in the above-described embodiment, each member constituting the multifunctional filter, such as a rake and a method of attaching the rake, has been described in detail. However, this is an example, and each member is limited as described in the present invention. If glass lining or ceramics is used, it goes without saying that any of the conventionally known structures can be used.

[0023]

As is apparent from the above description, according to the present invention, among the members constituting the multifunctional filter, the inner surface of the container, the impeller shaft and the impeller arm of the stirring blade, and the filter In addition to applying glass lining to the bottom plate surface and making the rake of the stirring blade part of ceramic, the above-mentioned case where all members are Teflon-lined or glass-lined and all members are made of ceramic There is no problem, and a multifunctional filter having high corrosion resistance and abrasion resistance and free of metal ions can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing the overall configuration of a multifunctional filter of the present invention.

FIG. 2 is a diagram for explaining each function of a niece's multifunction filter.

FIG. 3 is a diagram showing the configuration of another example of the multifunctional filter of the present invention.

FIG. 4 is a diagram showing an example of a rake shape used in the multifunctional filter of the present invention.

FIG. 5 is a view showing another example of a rake shape used in the multifunctional filter of the present invention.

FIG. 6 is a diagram showing an example of a rake attaching method in the multi-function filter of the present invention.

FIG. 7 is a view showing another example of a rake attaching method in the multifunctional filter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container part 2 Slurry supply port 3 Inspection window 4 Discharge port 5 Heating jacket 6 Nozzle 11 Filtration part 12 Bottom plate 13 Spacer 14 Filter cloth 21 Stirring blade part 22 Impeller shaft 23-1, 23-2 Impeller arm 24 Rake 25 Drive part

──────────────────────────────────────────────────続 き Continuation of the front page Examiner Kenichi Mori (56) References JP-A-63-80813 (JP, A) JP-A-62-1416 (JP, A) JP-A-56-60615 (JP, A) JP-A-62-110712 (JP, A) JP-A-5-76708 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 35/00 B01D 29/01

Claims (5)

(57) [Claims] (A) a container portion; and (b) a filter portion provided on a bottom plate at the bottom of the container portion, wherein a filter cloth is disposed on a spacer or a ceramic porous body is disposed, c) an impeller shaft that is rotated and moved up and down by a drive unit provided outside the container unit, an impeller arm attached to the plurality of impeller shafts, and a stirring blade unit composed of at least one rake attached to the impeller arm. Prepared, stirred,
Washing, drying, discharging, crystallization, in a multi-function filter having two or more functions of filtration, the inner surface of the container, the impeller shaft and impeller arm of the stirring blade portion, and the bottom plate surface of the filtration unit glass-lined <br/> facilities, constitutes the rake of the stirring blade unit of ceramics then
In both cases, the method of mounting the ceramic rake is
-The direction of the arm and the outer edge of the cake scraping surface of each rake
Section, the direction of the impeller arm and the
The angle between the cake scraping surface and the cake side
So that it grows from inside to outside,
If the cake is taken out from the center, go from inside to outside.
A multifunctional filter characterized by having a small size . 2. The multifunctional filter according to claim 1, wherein a Teflon bellow is provided on an outer peripheral portion of the impeller shaft. 3. The multifunctional filter according to claim 1, wherein the spacer of the filter section is made of Teflon. 4. A ceramic rake of the stirring blade portion includes a bottom surface, a rake mounting portion used for mounting to the impeller arm, and a cake scraping surface rising in an L-shape at an acute angle with respect to the bottom surface. The multifunctional filter according to any one of claims 1 to 3, further comprising a cake smoothing surface rising in an R shape with respect to the bottom surface on a side opposite to the cake scraping surface with respect to the bottom surface. 5. The multifunctional filter according to claim 1, wherein a ceramic rake of the stirring blade is screwed to the impeller arm.