JP2544519B2 - Solidifying material filling device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a solidification device for radioactive waste, and particularly to solidification suitable for preventing pipe clogging due to adhesion and sticking of the solidification material in a solidification material filling device. Material filling device.

[Conventional technology]

In the conventional cement solidification equipment using the outdrum mixing method (Research and development on radioactive waste treatment and disposal)
(Industrial Technology Publishing Co., Ltd., 1983, Techno Project Co., Ltd.), because the container was filled with cement from the mixer with piping, and the cement adhered to the filled piping, making it difficult to clean the filled piping. The pipe was clogged.

[Problems to be Solved by the Invention]

In the prior art, although the solidifying material was filled in the container along the straight-lined filling pipe, only a part of the filling pipe could be washed. For this reason,
The solidified material adhering to the pipe sometimes adhered inside the pipe and blocked the filled pipe.

An object of the present invention is to provide a solidifying material filling device capable of preventing contact of the solidifying material with the inner surface of the conduit in a region where the conduit for guiding the solidifying material cannot be washed.

[Means for solving the problem]

The above-mentioned object is attached to the bottom of the solidifying material kneading tank via a solidifying material sluice valve, is provided vertically below the bottom portion, and the solidifying material in the solidifying material kneading tank is filled with radioactive waste. A first pipe for injecting into the container, a throttle portion provided in the first pipe below the solidifying material sluice valve, and a lateral connection to the first pipe below the throttle. And a three-way valve provided at an intersection of the first pipeline and the second pipeline.

[Action]

Guide the solidifying material into a container filled with radioactive waste
The solidified material drops in the central portion of the first pipeline and reaches the inside of the container by the narrowed portion provided in the pipeline. For this reason,
The solidifying material is below the squeezing part, especially when the washing water does not flow
Below the intersection with the pipeline, it does not contact the inner surface of the first pipeline. The solidification material does not adhere to the inner surface of the first pipeline below the intersection with the second pipeline, and the first pipeline can be prevented from being blocked.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First
FIG. 1 is a system flow chart showing an outline of the solidifying material filling device, FIG. 2 is a cross-sectional view of a main part of the solidifying material filling device which best shows the features of the present invention, and FIG. It is sectional drawing showing a state.

In FIG. 1, the solidifying material sluice valve 20, the throttle portion 30, and the solidifying material filling vertically arranged on the downstream side of the solidifying material kneading tank 10 equipped with a stirrer 85 for kneading when filling the solidifying material. The pipe 40 and the wash water discharge pipe 60 constitute a solidifying material filling device. Further, the wash water discharge pipe 60 is connected to the wash water receiving tank 70, and the wash water passes through the wash water discharge three-way valve 80,
It is discharged to the wash water receiving tank 70.

As shown in FIG. 2, the throttle portion 30 has a double-tube structure, and a throttle tube 90 is incorporated therein, which restricts the flow path of the solidifying material, and the solidifying material is downstream of the narrowing tube 90. Side throttle 3
0, the three-way valve for flushing water 80, the three-way valve for flushing water 100, and the container 50 are filled without coming into contact with the wall surface of the solid material filling pipe 40.

As shown in FIG. 3, at the time of equipment cleaning, the cleaning water discharge three-way valve body 100 is switched to the cleaning water discharge pipe 60 side, and cleaning water is injected from the solidifying material kneader side to perform cleaning.
At this time, since the solidifying material is not attached to the solidifying material filling pipe 40, it is not necessary to wash the solidifying material filling pipe. Further, the wash water is transferred to the wash water receiving tank through the wash water discharge pipe 60 and stored therein.

FIG. 2 shows the state of the solidifying material filling device when the solidifying material is filled in the container 50 in which the radioactive waste is filled. The solidifying material sluice valve 20 is opened, and the solidifying material flows into the throttle portion 30. Here, the flow path of the solidifying material is limited to only the vicinity of the inner center of the solidifying material-filled pipe 40 by the throttle tube 90. Further, since the entire solidifying material filling device is configured in the vertical direction, the solidifying material is filled in the container 50 without contacting the wall surface on the downstream side of the throttle tube 90, so that the solidifying material of the solidifying material filling pipe 40 It is possible to prevent the occurrence of blockage due to adhesion and sticking of the.

FIG. 3 shows the state of the solidifying material filling device when the washing water is discharged after the operation of the solidifying material filling device is completed. To clean the equipment, close the solidifying material sluice valve 20 and use the three-way valve body for cleaning water discharge.
By switching 100 to the washing water discharge pipe 60 side, pouring the washing water into the solidifying material kneading tank 10 and starting the stirrer 85, the solidifying material kneading tank
After washing 10 is performed, the solidifying material sluice valve 20 is opened to discharge the washing water to the washing water receiving tank 70. Here, the cleaning of the solidifying material sluice valve 20 and the throttle pipe 90, which need to be washed by the solidifying material filling device, can be performed by washing water (running water) from the solidifying material kneading tank 10. Therefore, the solidifying material does not remain in the solidifying material filling device.
No clogging due to adhesion or sticking of solidified material occurs.

Although the outlet of the throttle tube 90 is horizontal in the above-mentioned embodiment, it may be inclined like the throttle tube 91 of FIG.

The shape of the throttle tube does not have to be a conical shape, but a hole is made in a flat plate like the throttle tube 92 in FIG. 5, and the periphery of the hole is directed downward to prevent sticking of the solidifying material to the wall surface. It may be something like.

As in the throttle pipe 93 of FIG. 6, a nozzle may be provided at the outlet of the throttle pipe to adjust the flow of the solidifying material.

A guide rod 95 is provided at the outlet of the throttle pipe as in the throttle pipe 94 of FIG.
Such a structure may be provided to adjust the flow of the solidifying material. FIG. 8 shows a detailed view of the throttle tube.

〔The invention's effect〕

According to the present invention, the solidifying material is below the narrowed portion, particularly below the intersection with the second pipe line through which the washing water does not flow.
Does not contact the inner surface of the first conduit. The solidification material does not adhere to the inner surface of the first pipeline below the intersection with the second pipeline, and the first pipeline can be prevented from being blocked.

[Brief description of drawings]

FIG. 1 is a system flow chart showing the outline of the solidifying material filling device,
FIG. 2 is a vertical cross-sectional view of the main part of the solidifying material filling device, FIG. 3 is a vertical cross-sectional view of the main part of the solidifying material filling device at the time of cleaning the device, and FIGS. 4 to 7 are solidifying materials in other examples. FIG. 8 is a longitudinal sectional view of the main part of the filling device, and FIG. 8 is an explanatory view of the throttle tube in FIG. 10 ... Solidifying material kneading tank, 20 ... Solidifying material sluice valve, 30 ... Throttling part, 40 ... Solidifying material filling pipe, 50 ... Container, 60 ... Wash water discharge pipe, 70 ... Wash water receiving tank , 80 …… 3-way valve for draining wash water, 85 …… agitator, 90 to 94 …… throttle pipe, 95 …… guide rod.

Front page continued (72) Inventor Norihide Toyama 3-2-1, Saiwaicho, Hitachi City, Ibaraki Hitachi Engineering Co., Ltd. (72) Inventor Yasuo Koshino 3-2-1, Saiwaicho, Hitachi City, Ibaraki Hitachi Engineering Incorporated (72) Inventor Ya Tanaka, 3-2-1, Saiwaicho, Hitachi, Ibaraki Hitachi Engineering Co., Ltd.

Claims (1)

(57) [Claims] 1. A solidifying material kneading tank having a stirring device inside,
A solidifying material filling device comprising means for supplying cleaning water to the solidifying material kneading tank, wherein the solidifying material kneading tank is attached to a bottom portion of the solidifying material kneading tank via a solidifying material sluice valve, and is provided vertically below the bottom portion. A first conduit for injecting the solidifying material in the solidifying material kneading tank into a container filled with radioactive waste; and a throttle portion provided in the first conduit below the solidifying material sluice valve. And a second pipeline that is laterally connected to the first pipeline below the narrowed portion and discharges the wash water, and is provided at an intersection of the first pipeline and the second pipeline. A solidifying material filling device comprising a three-way valve.