JPS61146332A - Guiding part of wet cake - Google Patents

Abstract

PURPOSE:To remove a wet cake sticking to a filter cloth by providing a roller having a deformed sectional shape which contacts with the external side of the inside wall surface of an endless belt constituting the part of the inside wall surface of a main body being rotated simultaneously. CONSTITUTION:The wet cake rising upward by sticking to a filter cloth 16 is beaten down successively from the surface of a filter cloth 16 vibrating at the neighborhood of a roller 19 to fall into an opening part at the bottom end of the main body 15 of a guiding part. the filter cloth 16 is formed freely rotatably so as to construct the inside wall surface of a wall part 23 at a side where the wet cake of the main body 15 of the guiding part is charged, and a roller 19 having a sectional shape like a triangular cam which gives vibration to the filter cloth is provided to the inside wall surface at the top part of the filter cloth 16. By such a constitution, the wet cake rising upward together with the filter cloth 16 by sticking to the filter cloth 16 is beaten down mechanically successively from above the filter cloth 16 at the top part of the filter cloth 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wet cake guide used in a process for treating a wet cake consisting of a liquid and insoluble solid particles.

[Conventional technology]

For example, when producing uranium dioxide powder, which is a raw material for power reactor fuel, first solid uranium hexafluoride (UP
・) is heated, and this UF・ is brought into contact with pure water to hydrolyze it, and then aqueous ammonia is added thereto to form a precipitate of ammonium deuterate (DU). Next, the slurry containing the human DU precipitate is supplied via a pipe 4 onto a filter cloth 3 rotatably stretched between the drive drum 1 and the tail drum 2, as shown in FIG. do. Then, the slurry 5 supplied onto the filter cloth 3 is dehydrated from the filter cloth 3 through a drain pipe 7 having a large number of pores 6, and becomes a wet cake 8 with a moisture content of 30% to 40%. . Next, the wet cake 8 is scraped from the upper blade of the filter cloth 3 by a scraper 9 and thrown into the wet cake guide section 10.
The above guide l.

The dryer 11, which is the next step, is guided through the interior of the dryer 11.

Then, the wet cake 8 is dried! The DU powder obtained by drying and pulverizing in 1Al1 is further roasted and reduced to obtain the above-mentioned uranium dioxide powder.

By the way, conventionally, in the process of treating the wet cake as described above, the guide part 10 for guiding the wet cake 8 into the dryer 11 has been made of upper and lower ends made of stainless steel or the like as shown in FIG. A rectangular cylinder with 12 and 13 openings is used.

[Problem that the invention seeks to solve]

However, the conventional wet cake guide section 10 has a problem in that the upper 4d wet cake 8 tends to adhere to the inner wall surface 14 of the guide section 10. For this purpose, for example, using a loincloth or the like with a flat plate attached to the tip, the inner wall surface 1
4. It is troublesome to frequently have to remove the wet cake by scraping off the wet cake attached to the guide part 10 or by applying vibration from the outer periphery of the guide part 10 with a wooden hammer or the like. . Also, during the removal process, a large amount of wet cake adhering to the inner wall surface 14 of the guide section 10 falls into the dryer 11 at once, which prevents uniform drying in the dryer. There was also the drawback that efficiency deteriorated.

[Purpose of the invention]

This invention was made in view of the above circumstances, and it is possible to mechanically remove the wet cake layered on the inner wall surface as appropriate, thereby saving labor in the removal work, and also making it possible to transfer the wet cake to the next machine. The object of the present invention is to provide a wet cake guide that can stably flow the wet cake.

[Structure of the invention]

The wet cake guide of the present invention is provided with an endless band that forms a part of the inner wall surface of the guide body and is rotationally driven in a cylindrical guide body with both upper and lower ends open. A roller with an irregular cross section is provided, which is in contact with the inner wall surface of the roller on the outside thereof and is rotationally driven.

〔Example〕

FIGS. 1 and 2 show an example of the wet cake guide section of the present invention.

In FIGS. 1 and 2, this guide section includes a cylindrical guide section main body 15, a filter cloth (endless band) 16 provided within this guide section main body 15, and a rotating shaft that rotatably holds this filter 416. It is generally composed of a drive section 17 and a roller 19 connected to the rotation drive section 17 and driven to rotate.

The guide main body 15 is made of stainless steel or the like and has a thin, substantially rectangular cylindrical shape, and is disposed at both open ends 1tst, facing upward and downward. Above the guide body 15! Two openings 20 are formed to gradually widen upward, and an a/r weight rectangular flow path 21 is formed inside the openings 20 . Of the wide 5 & 22.23 portions of the guide body 15, the wall portion 23 facing the inflow direction of the wet cake indicated by the two-dot chain arrow in Fig. 41 has the inner W23 along its longitudinal direction. An opening 24 is formed by cutting out the same width. Further, a rectangular frame 25 is integrally formed on the peripheral edge of the opening 24 and projects outward from the opening 24, and a flange 26 is formed at the tip of the frame 25. Then, on the upper dd flange part 26, an i body 27 made of transparent synthetic 1rB resin such as acrylic is attached to the bolt 2.
8... and nuts 29..., the layers are detachably attached. As a result, the opening 24 surrounded by the frame 25 is fanned out, and a shallow box-shaped recess 30 formed by the frame 25 and the attachment body 27 is formed in the wall 23 of the guide main body 15. ing. The filter cloth 16, the rotating ff1m section 17, and the roller 19 are incorporated into the recess 30.

The rotation drive i17 further includes a drive roller 32 that is formed integrally with the drive shaft 31 and has a length somewhat shorter than the width of the recess 30, and a support shaft 33 that is loosely inserted into the drive roller 32, which is rotatable. It consists of a driven roller 34 of equal length. The drive roller 32 is disposed horizontally above the recess 30, and is rotatably supported by bearings 35, 35 attached to the frame 25 at both i and Il of the drive shaft 31. One end 36 of the drive wh-shaft 31 is connected to an electric motor (not shown). The follower roller 34 is arranged at the lower part of the recess m30 so as to be parallel to the drive roller 32. Both 4ifli of the support shaft 33 loosely inserted into the driven roller 34 are pushed into a sleeve 37° 37 which is provided so as to be movable in the vertical direction with respect to the frame portion 25, and are integrally and movably supported. ing. Also, the upper part 41 of the screw $38.38 is fixed to the lower part of both shoulders of the support shaft 33.
The lower parts of the threaded rods 38, 38 pass through the fixing member 439.39t horizontally fixed to the frame body 25 and protrude downward. Further, a nut 40.40 is screwed into the lower four parts of the screws 44!38.38, so that when the upper d-pitch holding shaft 33 is rotated, the sleeve 37.3
7 and can move vertically with respect to the guide body 15. The filter cloth 16 is stretched between the drive roll 32 and the driven roll 34.

The filter cloth 16 is made of synthetic fiber with a smooth surface, and has a width slightly shorter than the drive roller 32. The filter 16 is wound in an endless band between the drive roll 32 and the driven roll 34 so as to form part of the inner wall surface of the wall fi122. Here, the above filter 16
is tensioned between the driving roll 32 and the driven roll 34 under some tensile force as the nut 40° 40 is rotated and the support @ 33 is moved downward. Further, the roller 19 is provided above the filter cloth 16.

Upper 6d roller 19 is 11? It is a rod-shaped member with a triangular cam-shaped surface, and its length is slightly longer than the width of the cloth 16. This roller 19 is inserted into the upper part between the upper two self-driving rollers 8 and the driven rollers 32, 34+1jj6 (stretched filter cloth 16), and the above-mentioned kalh driving and driven rollers 32
, 34. The roller 19 is a bearing attached to the frame 25 so as to come into contact with Ifi (the surface facing the outside of the guide body 15) on the opposite side to the surface facing the t/ItNI 2111 of 5; [6. 43, 43 so as to be rotatable. Further, a belt base 44 is fixed to one end of the roller 19, and this belt base 44 and one end 3 of the drive shaft 31 are connected to each other.
A belt pulley 45 fixed to 6 is delayed by a belt 46. As a result, the roller 19 is rotated by 1 g in accordance with the rotation of the drive shaft 31 at a single rotation speed faster than the drive shaft 31.

In the wet cake guide section consisting of the above 14 components, the wet cake is introduced into the flow path 21 from the upper end opening 20, and in parallel, the "4-movement motor (not shown) is operated, and the drive shaft 3
1 in the direction of the arrow in FIG. Then, the above filter cloth 1
6 rotates via a drive roller 32 in a direction in which the surface facing the flow path 21 rises.

As a result, the wet cake sent into the flow path 21 and attached to the filter cloth 16 rises above the filter cloth 16. Meanwhile, in parallel with this, the rotation of the drive #@31 causes the roller 19 to rotate at a high rotational speed via the belt 46, and sequentially impacts the filter cloth 16 with three protrusions formed on its outer periphery. Add to this and vibrate it.

As a result, the wet cake that adheres to the filter cloth 16 and rises is successively knocked off from the vibrating filter cloth 16 in the vicinity of the roller 19 and falls to the lower end opening of the guide main body 15. go.

According to the wet cake guide section, the filter cloth 16
The wall portion 2 of the guide body 15 on the side where the wet cake is introduced
The filter cloth 16 is provided with a triangular cam-shaped roller 19t on the upper inner wall surface of the filter cloth 16 to vibrate the filter cloth 16. Cartoon cakes that adhere to the filter cloth 16 and rise together with the filter cloth 16 can be carefully knocked off from above the filter cloth 16 one after another at the upper part of the filter cloth 16. As a result, this type of inefficient removal work, which conventionally required labor, can be reduced to a large scale. In addition, since a large amount of the removed wet cake does not flow out at once to the next process, the flow to the next process can be made uniform and work efficiency in the next process can be improved. can. Furthermore, by providing a roller 19 with a triangular cam-shaped cross section on the filter 16 to constantly give perturbation to the filter cloth 16, it is possible to prevent the wet cake from adhering to the filter cloth 16, thereby further enhancing the removal effect. be able to.

In the above embodiment, the filter cloth 16 is attached to the guide body 1.
Although it is provided only on the wall portion 23 @ of No. 5, it is not limited thereto, and if it is also provided on the side of the wall portion 22 facing T in addition, an even more excellent effect can be obtained. In addition, in the above explanation, the filter cloth 16't is rotated in a continuous manner, but the invention is not limited thereto. Furthermore, the rotation direction of the filter cloth 16 and the mounting position of the roller 19 are not limited to those described above. A roller 19 may be disposed on the lower inner wall surface of the filter cloth 16, or a large number of rollers 19 may be disposed along the vertical direction on the inner wall surface of the filter cloth 16 regardless of the rotating direction of the filter 416. The cross-sectional shape of the roller 19 should also be changed as appropriate depending on the length and material of the filter cloth 16.

〔Effect of the invention〕

As explained above, the wet cake guide part of the present invention has an endless band which forms part of the inner wall surface of the guide part body and is rotationally driven, inside the cylindrical guide part body with both upper and lower ends open. A roller f having an irregular cross section is provided, and is in contact with the inner wall surface of the endless band on the outside thereof and is rotationally driven. Therefore, according to this guide part, the wet cake adhering to the filter cloth can be continuously and mechanically removed by the roller, so that it is possible to significantly save labor in this type of removing confectionery.

Moreover, this makes it possible to make the flow of the wet mill cake uniform to the next process, thereby realizing uniformity of the millet crop in the next process, and therefore efficiency.

[Brief explanation of drawings]

Figures 1 and 2 are of this invention! Figure 1 is a schematic side view taken in cross section, Figure 2 is a sectional view taken from Figure 1, and Figures 3 and 44 are the conventional one. Fig. 3 is a schematic diagram of the wet cake treatment process in which the guide part is used, and Fig. 4 shows the guide part.
The figure is a perspective view of the guide section. 15... Guide body, 16... Filter cloth (
Endless band), 17...Rotational drive S% 19...
... Roller % 20 ... upper end opening, 21 ...
...Flow path, 22.23... Wall part. Figure 1 Hue Figure 2

Claims (1)

[Claims] a wet cake guide section that guides the wet cake introduced from the opening on the upper end side and flows out from the opening on the lower end side, the guide section main body having a cylindrical shape with both upper and lower ends open;
An endless band that forms part of the inner wall surface of the guide body and is rotationally driven; and a roller having an irregular cross section that contacts the inner wall surface of the endless band on the outside and is rotationally driven. A wet cake guide section characterized by: