JPS5837598A - 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.

In general, clothing worn in the radiation-controlled areas of nuclear power plants may be contaminated with radioactivity to some extent, so once worn, they are managed all at once, washed, and reused. Conventionally, these clothes have been washed using a so-called dry cleaning method in which stains are removed using an organic solvent using a washing device as shown in FIG. That is, reference numeral 1 denotes a washing drum in which worn clothes are stored and brought into contact with a solvent such as tricumylethylene to remove dirt.

The solvent discharged from the cleaning drum 1 is sent to the filter 1 by the pump Z#c, and the insoluble OII-soluble substances contained in this solvent are separated and collected. It is returned to drum l. A part of the solvent that has passed through the filter 1 is sent to a distiller 4 where it is distilled to remove dissolved substances, and then sent to a cooler 5 where it is condensed. The condensed solvent is separated into gas by a separator C, and then sent to a solvent storage unit 1 where it is stored, and then returned to the cleaning drum 1 by a pump I. Further, an exterior wall t is provided to surround the entire cleaning device, and is configured to shield radiation. By the way, such a washing device has the advantage that laundry wastewater containing radioactive substances is not discharged, but on the other hand, since the solvent is circulated and reused, dirt from clothes containing radioactive substances is mainly collected in the filter s. accumulate. By the way, it is necessary to periodically replace the P material inside the filter 1. However, as mentioned above, the P material in the filter 3 collects and accumulates dirt containing radioactive substances, so the replacement of the P material must be carried out under strict control. The work efficiency of this P material replacement work is low and requires a long time. For this reason, the operation of this cleaning device must be stopped while the P material is being replaced, resulting in a problem that the operating rate is significantly reduced.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide a washing device for radioactively contaminated clothing that can improve the operating rate.

The present invention will be explained below according to an embodiment shown in FIG. In the figure, 1o1 is a washing drum, and clothes worn in a radiation controlled area are stored in this washing drum 101. A trichlorethylene-based solvent is supplied into the cleaning drum 101, and this solvent is configured to come into contact with clothing and remove stains therefrom.

The solvent discharged from the cleaning drum 101 is sent by a pump 103 via a pipe 104 to a plurality of, for example, three, transitors 105m, 1Dib, and 101c. And these overloaders 10#a, 1alib,
The xolc is configured to temporarily collect insoluble and dissolvable ψ substances suspended in the solvent and regenerate this solvent. And these over-containers 106a.

The solvent that has passed through 101rb and 105G is returned to the cleaning drum 161 via piping 106°JOF. And these filters 105m,
1011b, IOICs are connected in parallel with each other. And 101 m of these vessels.

A switching valve mechanism 11& is provided in the upstream piping 1114 and the downstream piping 10- of ROLB and TOSC, respectively.

111 is provided. And these switching valve mechanisms 11
6. ll'l is the filter 105a.

The inflow of solvent into 105b, 105G and the outflow of solvent from these sieves 105m, 10Sb, 105c are selectively closed, and an optional filter 105a.

The structure is such that 10Sb and IJ5G can be separated and excluded from the solvent flow path. Also, these −
A portion of the solvent filtered by the filters ZO5a, r05b, and 105c is sent to the steamer 110 via piping 109. The distiller 110 is configured to distill the solvent and remove dissolved substances. The solvent vapor discharged from this distiller 110 is then transferred to a cooler Il.
It is sent to l and condensed. Then, it is returned to this cooler 1.11 cooler 111. And this solvent storage tank 1
The solvent stored in pipe 11 is pumped to pipe 1 by pump 114.
15 to be returned to the cleaning drum 101 again.

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 and dissolvable substances suspended in this solvent are filtered through a filter.

The substances temporarily collected by xesb and xaic and dissolved are collected by distiller 110. Under normal conditions, the switching valve mechanisms 116 and 111 are operated to
I1. Flow the solvent through 105b and 105C. And these filters 105a.

When replacing part of the tasb and xoic, operate the switching valve mechanisms rxi and xxy,

105b, 1011G, e.g.
The flow of the solvent to the filter 105m is immediately cut off, and the filter 105m is separated and excluded from the solvent flow path.

Furthermore, since there are three of these filters 10s1, 1e5b, 105C, even if one of the filters 105& is separated, the solvent filtration can be continued with only the remaining 241M filtration 9101b, 105c. , there is no need to stop this cleaning equipment. Then, in this state, the P material of the filter 105m is replaced. When the P material of this filter 10SR has been replaced, the switching valve mechanism 116.11';r
is operated to allow the solvent to flow through the filter Xoss, while blocking the flow of the solvent to the next filter 105b to separate this filter 105b and replace the door material. and,
In this way, the filters 105a, 105b, I
Replace the P material of D5c. Therefore, the 105m, 10Sb, 10Sb, 10V
Since the P material can be replaced in step 5c, the operating rate of this cleaning device can be greatly improved.

Note that the present invention is not limited to the above-described embodiment; for example, the number of pass-through devices is not limited to three, but may be two or four or more.

As described above, the present invention provides a plurality of filtration devices arranged in parallel to separate and collect insoluble and poorly soluble substances in a solvent, and selectively blocks the flow of the solvent to these filtration devices to remove any filtration. It is equipped with a switching valve mechanism that separates the container from the solvent flow path. Therefore, it is possible to selectively separate these strainers from the solvent flow path and replace the furnace materials of the strainers one by one without stopping the cleaning apparatus.

Therefore, even if it takes a long time to replace the P material, the cleaning device can continue to be operated during this time, and the operating rate of the cleaning device can be greatly improved, which has great effects.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a conventional example. FIG. 2 is a schematic diagram of an embodiment of the present invention. 10 f-, washing drum, 105a, 1σgb. talc...f' passer 116. Ilr...Switching valve mechanism, 116...Distiller.

Claims (1)

[Claims] A cleaning drum that accommodates radioactively contaminated clothing and removes stains by bringing a solvent into contact with the clothing; and a solvent that is provided apart from the cleaning drum and is contained in the solvent discharged from the cleaning drum. The method includes a plurality of transitors connected in parallel to separate and collect insoluble and dissolvable substances, and a switching valve mechanism that selectively closes the flow of solvent to the plurality of transitors. Features: A washing device for radioactively contaminated clothing.