JPS6023288Y2 - Denitration powder pulverization equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a denitrification product powdering device, for example, uranium,
The present invention relates to a denitrification product powdering device that pulverizes a solidified oxide cake formed by directly denitrifying a nitrate solution such as plutonium using a heating device such as a microwave heater, and efficiently transfers the solidified oxide cake to a container.

FIG. 1 shows an apparatus for obtaining a solidified oxide cake from a nitrate solution of nuclear material such as uranium or plutonium.

That is, the solidified oxide cake 3 is obtained by placing a nitrate solution of the nuclear material in a metal flat-bottomed dish 1 and heating it in a heating oven 2 using microwaves emitted from a magnetron 2a to remove the nitrate.

2 and 3 show an example of means for crushing the solidified oxide cake 3 into powder and transferring it to a container.

The solidified oxide cake 3 is taken out from the microwave heating oven 2 while still in the flat-bottomed dish 1, and as shown in FIG.
The solidified oxide cake 3 is pulverized to some extent by making a notch and then rotating it around.

Thereafter, as shown in FIG. 3, the powdered solidified oxide cake 3 in the flat bottom 1 is transferred to a funnel-shaped hopper 5 and placed in a container 6 provided at the bottom of the funnel-shaped hopper 5.

In this method of crushing the solidified oxide cake and transferring it to the powdering main cylinder, the solidified oxide cake 3 has a solid shape, but has the property of being easily powdered by a slight force, Solidified oxide cake 3 using spatula-like blade 4
When powdering the solidified oxide cake 3 or transferring the powdered solidified oxide cake 3 to the funnel-shaped hopper 5, the fine powder easily spills and scatters to the surroundings, resulting in leakage loss and contaminating the surroundings, resulting in nuclear material Since this is undesirable from the viewpoint of quantity control and radiation exposure measures for workers, some kind of improvement measure is required.

The present invention has been made to satisfy the above-mentioned needs, and the object is to provide a denitrification powdering device that can efficiently transfer a powdered solidified oxide cake to a container without scattering it.

Hereinafter, one embodiment of the apparatus according to the present invention will be described with reference to the drawings.

In FIGS. 4 and 5, reference numeral 10 denotes a pedestal, and the pedestal 10 is formed by standing a longitudinal support 12 and a short support 13 on a base 11.

A pair of shaft fixing bodies 15.15 are provided on the side walls of the conical powdering main body cylinder 14 attached to the pedestal 10, facing each other, and a rotating shaft 16 is provided on the outside of each of the shaft fixing bodies 15.
is attached and extends horizontally.

The powdering main body cylinder 16 is rotatably attached to the pedestal 10 by supporting a pair of rotating shafts 16 provided on the powdering main body cylinder 14 on the tops of the longitudinal struts 12 and short struts 13 of the pedestal 10. .

Further, an electric motor 17 is attached to the top of the short support 13, and a rotating shaft 16 supported by the short support 13 is connected to the electric motor 17, and the rotation of the electric motor 17 causes the powdering main body cylinder 14 to is reversed.

Further, a vibrator 18 is attached to the top of the longitudinal support 12 for applying vibration to the powdering main body cylinder 14 when the powdering main body cylinder 14 is reversed.

Both ends of the motor mounting rod 19 are fixed inside a pair of shaft fixing bodies 15.15 provided opposite to each other on the side walls of the powdering main body cylinder 14.

A motor attachment rod 19 is disposed inside the powdering main body cylinder 14, a rotary blade 20 is suspended from the center thereof, and an electric motor 21 is attached to the upper end of the blade 20.

Further, a collar edge 22 is provided at the bottom of the powdering main body cylinder 14, and a fixing plate 23 is attached to the collar edge 22.

The fixing plate 23 is attached by placing the metal flat-bottomed plate 25 containing the solidified oxide cake 24 on the fixing plate 23, then tightening the collar edge 22 and the peripheral edge of the fixing plate 23, and tightening the bolts 26. The collar edge 22 and the fixing plate 23 are integrally connected by tightening the peripheral edges.

At this time, the edge 2 of the flat bottom side 25 placed on the fixed plate 22
7 is pressed and fixed to the collar edge 22.

Furthermore, a powder discharge port 29 having a shutter 28 is provided at the tip of the powdering main body cylinder 14, and a container 30 is fitted into the powder discharge port 29.

In the denitrification product pulverization apparatus having such a configuration, the flat bottom tray 25 containing the solidified oxide cake 24 is secured by a fixing plate 22 and tightened by a collar provided at the bottom of the pulverization main body cylinder 14 with a bolt 26. When fixed to the edge 22, it is pushed and fixed to the collar edge 22.

At this time, the rotating blade 20 moves the solidified oxide cake 24
It is inserted inside.

Next, when the rotary blade 20 is rotated by the blade electric motor 21, the solidified oxide cake 24 in the flat-bottomed dish 25 is continuously scraped off and pulverized, changing from a solid state to a powder state.

A container 30 containing the powder of the solidified oxide cake 24 is attached to the powder discharge port 29 of the powdering main body cylinder 14, and with the container 30 attached, the powdering main body cylinder 14 is As shown in Figure 4, flip it 180 degrees.

Then, the shutter 28 of the powder outlet 29 is pulled open, and the powder of the solidified oxide cake 24 in the flat-bottomed dish 25 is dropped into the container 30.

At this time, the rotary blade 20 is rotated until all of the powder falls into the container 30, and the vibrator 18 gives slight vibrations to the powdering main cylinder 14 to completely remove the powder adhering to the inside of the powdering main cylinder 14. Drop into container 30.

As explained above, the denitrification product powdering apparatus of the present invention includes a pedestal having a pair of pillars, a reversible powdering body cylinder supported by the pair of pillars of the pedestal, and a bottom portion of the powdering body cylinder. a tray containing a solidified oxide cake of nuclear material, which is attached in a sealed state to a rotary blade; , and a container attached to the tip of the powdering main body cylinder, so that when the solidified oxide cake in the dish is crushed and powdered and the powdered solidified oxide cake is transferred to the container, The process from pulverizing the solidified oxide cake to transferring it is carried out in a closed space consisting of a dish, powdering body cylinder, and container, so that the powdered solidified oxide cake does not scatter or leak outside. , without contaminating the surrounding area, eliminating the loss of the amount of nuclear material, achieving sufficient control of the amount of nuclear material, and reducing the radiation exposure of the members of the project.

In addition, in the denitrification product powdering apparatus of the present invention, one of the supports of the pedestal is equipped with a pie break that vibrates the powderization main body cylinder when the powderization main body cylinder is reversed, so that the powderization is not carried out. When the solidified oxide cake is transferred to a container, a vibrator applies slight vibrations to the powdering main body cylinder, so that the powder adhering to the inside of the powdering main body cylinder can be completely dropped into the container.

Therefore, it is possible to easily and efficiently transfer the powdered solidified oxide cake.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a method of obtaining a solidified oxide cake in a flat-bottomed dish, Fig. 2 is an explanatory diagram showing a method of pulverizing a solidified oxide cake in a conventional flat-bottomed dish, and Fig. 3 is the same. An explanatory diagram showing a method of transferring the powdered solidified oxide cake in a flat-bottomed dish to a container, Fig. 4 is a partially cutaway front view of the denitrification product powdering device according to the present invention, and Fig. 5 shows the same denitrification product. FIG. 3 is a partially cutaway front view showing the powdering device in an inverted state. 10... Frame, 12... Longitudinal support, 1
3...Short support, 14...Powdering main cylinder, 18...Pie break, 20...
Rotating blade, 24... Solidified oxide cake,
25... Flat bottom plate, 30... Container.

Claims (1)

[Claims for Utility Model Registration] ■ A pedestal having a pair of supports, a reversible powdering body cylinder supported by a pair of supports of the pedestal, and a solid body attached to the bottom of the powdering body cylinder in a sealed state. a tray containing a solidified oxide cake; a rotating blade disposed inside the powdering main body cylinder for crushing and powdering the solidified oxide cake in the dish; and a rotating blade attached to the tip of the powdering main body cylinder. 1. A denitrification product pulverization device comprising: 2. The denitrification product as set forth in claim 1 of the utility model registration claim, wherein one of the supports of the mount is equipped with a vibrator that vibrates the powdering main body cylinder when the powdering main body cylinder is reversed. Powdering equipment.