JP3130231B2 - Filtration and drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a filtration / drying apparatus used for filtering a stock solution or the like and further washing and drying cakes and the like, which are solids after the filtration.

[0002]

2. Description of the Related Art Conventionally, as a filtration and drying device for filtering a slurry-like stock solution inside and drying and discharging a solid cake containing water and the like remaining after the filtration, drying after filtration is performed by the main body of the device. And drying by hot air, drying by vacuum drying, drying by hot air, and the like.

[0003] For example, as a method of drying by heating from the outer surface of the apparatus main body, after a stock solution is introduced into a sealed filter chamber inside the filtration and drying apparatus main body, the filter chamber is pressurized or provided at the lower part of the filter chamber. After filtering by vacuum suction from the lower side of the filter medium, spreading was performed to remove cracks generated on the upper surface of the cake by stirring blades, making the filtration effective, and the filtrate passed through the filter medium from the outlet. Discharging, further washing the cake while rotating the stirring blade,
Then, while stirring the solid cake by a stirring blade formed to be vertically movable, a filter chamber is heated from the outer surface of the filter / dryer main body, and the cake is discharged from the filter / dryer main body as dry powder. I was

[Problems to be solved by the invention]

[0004] In such a filtration and drying apparatus, FIG.
As shown in the figure, the filter medium 32 is
It is mounted on a perforated plate 34 provided above 33. Therefore, when the cake 36 on the filter medium 32 is dried by heating by the heating means 35 provided on the outer peripheral surface and the lower surface of the filtration / drying device main body 31, the porous plate 34 and the porous plate 34 and the filtration / drying device main body 31 are dried. Since heat is transmitted to the filter medium 32 via the space 37 between the lower lid 33 and the heat transfer to the filter medium 32 is poor, the cake 36 on the filter medium 32 cannot be efficiently dried as a result. A point had arisen.

The present invention has been made to solve such a problem, and has a good heat conductivity to a cake.
An object of the present invention is to provide a filtration and drying apparatus that can efficiently dry a cake.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a means for solving the problem is that a filter medium 3 is provided inside a filtration and drying apparatus main body 1. In a filtration / drying apparatus provided with a heating means 7 for heating the inside of the filtration / drying apparatus main body 1 on the outer surface side of the filtration / drying apparatus main body 1, the filtration / drying apparatus main body 1 heated by the heating means 7 is provided. On the inner surface of the lower lid 2, the filter medium 3 is provided so as to come into contact therewith, and on the outer surface of the lower lid, a heating means 7 is provided. In addition, a filtrate outlet 8 is formed in the lower lid 2, In addition, a radial groove 12 formed on an inclined surface that becomes lower toward the filtrate outlet 8 and communicated with the filtrate outlet 8 is formed on the upper surface of the lower lid 2.

[0007]

[Function] That is, as described above, the filter medium 3 is a filter drying device.
1 is provided on the upper surface of the lower lid 2 and the heating means 7 is provided on the outer surface of the lower lid 2. Thus, heat is directly transmitted from the lower lid 2 heated to the filter medium 3, and the filter medium 3 itself is heated. Can efficiently heat the cake that is in contact with the filter medium 3 as a heat transfer surface, and can dry the cake quickly and satisfactorily.

Further, since the filter medium 3 is directly attached to the upper surface of the lower lid 2 of the filter / dryer main body 1, the filter medium 3 is supported by the lower lid 2 of the filter / dryer main body 1, and the strength of the filter medium 3 is increased. There is no possibility that the filter medium 3 is deformed or damaged even when the filtration is performed by pressurizing or vacuum suction from the lower surface of the filter medium 3.

A groove communicating with the filtrate discharge port 8.
12 and 13 are formed in the lower lid portion 2 so that the grooves 12 and 13 are formed.
Thereby, the filtrate is easily discharged from the filtrate discharge port 8 to the outside of the filter / drying apparatus main body 1.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, the structure of a filtration and drying apparatus as one embodiment will be described. Reference numeral 1 shown in FIG. 1 denotes a filtration / drying device main body having a bell-shaped housing. A rotary shaft 5 having a bellows 6 fitted on the outer periphery thereof is rotationally driven by a driving means 4 in the center of the main body of the filtration / drying device 1. Arranged vertically
The rotary shaft 5 is configured to be able to move up and down by a lifting device 14, and a stirring blade 10 is attached to the tip of the rotating shaft 5. Further, an outlet 9 for discharging the cake that has been filtered and dried is formed below the filtering and drying apparatus main body 1.

Reference numeral 2 denotes a lower lid for closing the lower opening of the filtration / drying apparatus main body 1. On the upper surface side of the lower lid 2, a concentric groove 13 as shown in FIGS. And a radial groove having a bottom surface formed on an inclined surface which communicates with a portion intersecting with the concentric groove portion 13 and becomes lower toward the filtrate discharge port 8 formed in the center portion of the lower lid portion 2. 12 are formed.

Reference numeral 3 denotes a filter medium attached to the upper surface of the lower lid 2 of the filter / drying apparatus main body 1 as shown in FIG. 4 so as to come into contact with portions other than the grooves 12 and 13. ,
Usually, a sintered metal, a wire mesh or a sintered wire mesh is used.

A metal material such as a sintered metal, a wire mesh or a sintered wire mesh is suitable as a filter material because the heat transfer is good and the effect of the present invention that the cake can be dried well and quickly can be further enhanced. .

Reference numeral 7 denotes a heating jacket attached to the outer periphery of the side wall and the bottom outer surface of the filtration / drying apparatus main body 1. When heating and drying the cake 15 inside the filtration / drying apparatus main body 1, the heating jacket is provided on the inner side of the heating jacket 7. Heating medium such as steam 11
Is used as a heating means for heating the inside of the filtration / drying apparatus main body 1 using the side and bottom surfaces of the filtration / drying apparatus main body 1 as heat transfer portions.

A cover plate 16 shown in FIGS. 2 to 5 is mounted above the filtrate discharge port 8 by a support 17 so as to be flush with the upper surface of the lower cover 2. Surrounding gap
The filtrate flowing through the grooves 12 and 13 from 18 flows into the filtrate outlet 8.

Next, a case where the undiluted solution is filtered and dried by the filtration and drying apparatus having the above configuration will be described.

First, a slurry-like stock solution is introduced into the filtration / drying apparatus main body 1 from a stock solution introduction port (Cez in the drawing).

Then, the inside of the filtration / drying apparatus main body 1 is pressurized, or a vacuum is applied from below the filter medium 3 to filter the undiluted solution. The filtrate that has passed through the filter medium 3 passes through the concentric grooves 13 and the radial grooves 12 and is discharged out of the filtration / drying apparatus main body 1 from a filtrate discharge port 8 formed at the center of the lower lid 2. At this time, since the bottom surface of the radial groove 12 is inclined so as to become lower toward the filtrate outlet 8, the filtrate flowing into the groove 12 easily flows toward the filtrate outlet 8 to be discharged.

Next, a heating medium 11 such as steam is introduced into the heating jacket 7 in order to dry the cake 15 which has been solidified by removing a certain amount of water by filtration. Is heated from the side and the bottom, and at the same time, the stirring blade 10 is rotated and moved up and down to make the cake.
Stir 15

At this time, as shown in FIG. 5, the heat from the heating medium 11 heats the inside of the filter / dryer main body 1 using the side surface of the filter / dryer main body 1 and the lower lid 3 as heat transfer portions. Since the filter medium 3 is disposed in direct contact with the lid 2 and the filter medium 3 is a metal wire mesh having high thermal conductivity, the upper surface of the filter medium 3 also effectively heats the cake 15 as a heat transfer surface. Can be dried.

Further, since the filter medium 3 is provided on the lower cover 2 of the main body 1 of the filter and drying apparatus, and the upper surface of the filter medium 3 is used as a heat transfer surface, the cake is more heated than the side of the filter and dryer. Fifteen
The heating from the bottom portion of the filtration and drying apparatus having a large area in contact with can be effectively used, the drying time can be further reduced, and the drying can be performed efficiently.

The cake thus filtered and dried
15 is discharged from the outlet 9 to the outside of the filtration and drying apparatus main body 1 in a state where water is removed.

In the above embodiment, the filter medium 3 is formed from a wire mesh made of a sintered metal. However, the material of the filter medium 3 is not limited to this, but may be any other metal, cloth, synthetic resin, or the like. Filter medium 3 consisting of However, if the filter medium is made of a material having a high heat conductivity, the cake can be more effectively heated and dried as a heat transfer surface.
It is desirable to use a material having high heat conductivity such as metal as the filter medium.

In the above embodiment, the radial groove 13 on the bottom surface is formed so as to become lower toward the filtrate outlet 8. However, the bottom surface of such a groove may be formed, and the concentric grooves 12 and It is not a condition to form a groove having a shape like the radial groove 13, and it is not a condition to form such a groove.

In addition, the filtration / drying apparatus main body 1, the stirring blade 10,
The structure of the rotating shaft 5 and the like is not limited to the above embodiment, and the design can be arbitrarily changed.

[0026]

As described above, in the filtration and drying apparatus of the present invention, heat is efficiently transmitted to the filter medium, and the filter medium itself can directly heat and dry the cake as a heat transfer surface.
The drying operation can be performed in a short time, and the drying of the cake can be performed satisfactorily because there are many heated surfaces. Therefore, the filtration and drying operation can be performed economically, and the moisture content of the discharged powder can be reduced to improve the quality of the powder.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a filtration and drying apparatus as one embodiment.

FIG. 2 is a front view of a lower lid.

FIG. 3 is an enlarged sectional view taken along line XX of FIG. 2;

FIG. 4 is an enlarged sectional view of a main part of the filtration / drying apparatus.

FIG. 5 is an enlarged sectional view of a main part when the cake is dried.

FIG. 6 is a schematic sectional view showing a conventional filtration and drying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration-drying apparatus main body 2 Lower lid part 3 Filter material 7 Heating jacket (heating means) 8 Filtrate discharge port 12,13 Groove part

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 29/00-29/96 B01D 35/00-35/34

Claims (1)

(57) [Claims] 1. A filter medium (3) inside a filter / drying device main body (1).
A heating means (7) for heating the inside of the filtration / drying apparatus main body (1) is provided on the outer surface side of the filtration / drying apparatus main body (1).
In the filtration drying apparatus provided with, the heating means (7)
(2)
The filter medium (3) is provided so as to be in contact with the inner surface of the lower cover, and a heating means (7) is provided on the outer surface of the lower cover. Further, the filtrate outlet (8) is provided in the lower cover (2). And a radial groove (12) formed on an inclined surface which becomes lower toward the filtrate outlet (8) and communicated with the filtrate outlet (8).
Is formed on the upper surface of the lower lid (2).