JPS5837599A - Cleaner for clothing polluted by radioactivity - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for washing radioactively contaminated clothing.

Clothes worn in the radiation-controlled areas of nuclear power plants may be contaminated with radioactivity to some extent, so they should be managed all at once after being worn, and should be washed and reused. be done. Conventionally, these clothes have been washed by so-called dry cleaning, in which stains are removed using an organic solvent using a washing amount as shown in FIG.

That is, 1 is a washing drum in which worn clothes are stored and brought into contact with a solvent such as trichlorethylene to remove dirt. The solvent discharged from the cleaning drum 1 is sent to the filter 1 by the pump 2, and the insoluble substances contained in the solvent are separated and collected.
A portion of this solvent is returned to the washing drum I. Further, a part of the solvent that has passed through the filter 1 is sent to the distiller d to be distilled to remove dissolved substances, and then sent to the cooler 5 to be condensed. The condensed solvent is separated into gases by a separator 6, and then sent to a solvent storage tank 1 where it is stored, and then returned to the cleaning drum 1 by a pump 3.

Further, an exterior wall t is provided to surround the entire cleaning device, and is configured to shield radiation.

By the way, such a cleaning device has the advantage that laundry wastewater containing radioactive materials is not discharged, but on the other hand, since the solvent is circulated and reused, stains from clothes containing radioactive materials are mainly absorbed by the door inside the transit device 3. It is collected and deposited in the wood. and,
The P material on which radioactive substances have accumulated is replaced periodically, and the used P material is disposed of as radioactive waste.

By the way, the used P taken out from inside the filter 3
Since the material is impregnated with a considerable amount of solvent, the amount of radioactive waste increases by the amount of solvent impregnated. Moreover, this used P material is treated as solid radioactive waste, but in this case, the solvent impregnated with it must be removed and dried, and when the solvent is removed, radioactive materials are released along with the solvent. Since there is a possibility that substances may diffuse, special care must be taken to remove this solvent, making the process extremely troublesome.

Furthermore, since the amount of solvent contained in the used P material is considerable as described above, there is also the problem that the solvent is wasted and the efficiency of use of the solvent is reduced.

The present invention has been made based on the above circumstances, and its purpose is to
To provide a washing device for radioactively contaminated clothing, which has a small amount of material as radioactive waste, is easy to dispose of, and can improve the efficiency of solvent use.

The present invention will be explained below according to an embodiment shown in FIG. In the figure, 101 is a washing drum, and clothes worn in a radiation controlled area are stored in this washing drum 101. A solvent such as trichlorethylene is supplied into the cleaning drum xttx, and the solvent is configured to come into contact with clothing and remove stains therefrom. Then, the solvent discharged from the cleaning drum taX is passed through the pipe 104 to the transitor 10 by the pump ROS.
Sent to 1J. This filter (ei) is configured to pass through and collect insoluble/dissolvable substances suspended in the solvent, and regenerate this solvent. The passed-through solvent is transferred to piping 106゜111.
7 and is returned to the cleaning drum 101. Further, a part of the solvent filtered by this P filter 1'o5 is sent to distillation 1S110 via piping 109. The distiller 110 is configured to distill the solvent and remove dissolved substances. The solvent vapor discharged from the distiller 110 is sent to the cooler III and condensed. And this cooler Ill
The vapor of the solvent exiting the tank is separated by a separator 112 and stored in a solvent storage tank 111. Note that the separated solvent vapor is returned to the cooler 111. The solvent stored in the solvent storage tank Ill is configured to be delivered to the cleaning drum 101 again by a pump 114.

Further, such a cleaning device is provided with a P material drying mechanism, and the configuration of this P material drying mechanism will be described below. That is, the pipe 10 upstream of the above-mentioned transit 61os
4 and downstream piping 10g each have a switching valve mechanism 115.
, 116 are provided. Gas circulation pipes 11'1 are connected to these switching valve mechanisms 115 and 116, respectively. The switching valve mechanisms 115 and 116 are configured to selectively connect the filter 106 and the pipes 104 and 106, or the filter 105 and the circulation pipe 11F. When the switching valve mechanisms 115 and 116 are switched to connect the passer 105 and the circulation pipe 11'1, the filter 106 and the circulation pipe 117 form a closed loop pipe. It is configured. The circulation pipe 117 is filled with a gas such as air or an inert gas. And this circulation pipe 11F
includes a blower 11g, a cooler 1111 and a heater 120.
is provided. Then, the gas in the circulation pipe 11r is sent to the heater XZO by the blower 11g and heated, becomes a high-temperature gas, is supplied into the filter ZOj, and is impregnated into the P material in the filter 10S. The P material is dried by evaporating the solvent contained therein. The gas that has passed through the p-filter 10B is cooled by a cooler 119 to condense the solvent vapor contained in the gas, and the condensed solvent is sent into the solvent storage tank 113 by a pump 121. It is composed of

In one embodiment of the present invention configured as described above, a solvent is supplied into the cleaning drum 101, and the cleaning drum 101 is supplied with a solvent.
It comes into contact with the clothes stored inside and removes dirt from them. The insoluble/hardly soluble substances suspended in this solvent are filtered and collected by the filter 105, and the dissolved substances are collected by the distiller 105.
Collected at 10.

The material inside the filter 105 is replaced periodically, but before taking out the used P material, the following operation is performed. First, the switching valve mechanisms 715 and 116 are operated to connect the filter 105 and the circulation pipe 117/. Then, the blower 11g is operated to send the gas in the circulation pipe 117 to the heating@120 via the cooler XXS, and after heating this gas to a high temperature, it is sent into the filter 105. Therefore, the solvent impregnated in the furnace material in the filter 105 is heated and evaporated by this high temperature gas. Then, the gas containing the solvent vapor is sent to the cooler 11 via the air blower tsxg and cooled, and the solvent vapor is condensed and separated. The gas from which this solvent vapor was separated is then heated W
k120 and fed again into the filter xoi. Note that the solvent condensed in the cooler Zjj is sent into the solvent storage tank IIJ by the pump Ill. By the circulation of this gas, the solvent contained in the P material in the filter 105 is evaporated, and the P material is dried. After the drying of the P material is completed, the used P material is dumped out and replaced with new P material. Therefore, this filter 10
Since the used furnace material taken out from S has already been dried in the filter 10S, its amount as radioactive waste is small and it can be easily disposed of. Saitako's used P
Since the solvent contained in the material is evaporated and recovered in the filter 105, the solvent is not wasted, and the efficiency of use of the solvent is improved.

Note that the present invention is not limited to the above embodiment.

For example, the specific structure of the P material drying mechanism is not necessarily limited to the above-mentioned embodiment, but the point is that high temperature gas is sent into a filter to evaporate and recover the solvent impregnated in the material. , this P
Any material that dries the material is fine.

As mentioned above, the present invention allows high temperature gas to flow through the transient,
A one-material drying mechanism is provided that evaporates and recovers the solvent impregnated into the P material and dries the P material in a passing vessel.

Therefore, the used P material can be dried in the transient chamber, which reduces the amount of removed P material as radioactive waste, and facilitates its disposal.
The solvent impregnated in the material can be evaporated and recovered in the filter, which has great effects such as improving solvent usage efficiency◇

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional example. FIG. 2 is a schematic diagram of an embodiment of the present invention. 101...Washing drum, rag...filter, la
g...-material drying mechanism, 117... circulation pipe, 118...
...Blower, rlg...Cooler, 120...Heater.

Claims (1)

[Claims] A washing drum that stores radioactively contaminated clothing and removes dirt by contacting the clothing with a solvent, and separates and collects insoluble and poorly soluble substances contained in the solvent discharged from this washing drum. It is characterized by being equipped with a filter and an F material drying mechanism that sends high-temperature gas to the filter gatekeeper, evaporates and recovers the solvent impregnated in the P material in the filter, and dries the P material. Equipment for washing radioactively contaminated clothing.