JPH0570120B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to dry cleaning equipment that uses a solvent to wash clothes, etc., and in particular, to dry cleaning equipment that uses a solvent to wash clothes, etc., and particularly clothes that are worn inside a nuclear power plant and have radioactive materials attached. Regarding dry cleaning equipment for washing clothes.

[Summary of the invention]

This invention is a dry cleaning facility that is equipped with multiple dry cleaning machines and one distillation machine, and is used to wash clothes worn in nuclear power plants. By providing this, the distiller can be made smaller.

[Prior art and its problems]

Traditionally, clothes worn inside nuclear power plants were washed with water, but as large amounts of laundry waste containing radioactive materials are generated and the equipment has become large and complex, the amount of waste water has recently been reduced. A new dry cleaning method was introduced.

FIG. 2 shows the main equipment configuration of general dry cleaning equipment, and washing is performed as follows.
Items to be washed, such as clothes, are put into a washing drum 1, and the solvent stored in a solvent tank 2 is transferred to the washing drum 1 through a filter 4 by a pump 3. During washing, the washing drum is rotated and the solvent is continuously passed through a circulation system consisting of a pump and a filter. After washing is completed, the solvent is returned to the solvent tank, and the washing drum is rotated at high speed to remove residual solvent using centrifugal force. After that, the leaked items to be washed are dried in a drying system consisting of a fan 5, a lint filter 6, a condenser 7, and a heater 8. The cotton waste from the items to be washed is removed by the lint filter, and the solvent vapor is removed by the condenser. It is condensed and collected by Dirt in the object to be washed is mainly removed by a filter, but some of it remains in the solvent, so after washing for a certain period of time, the solvent is distilled by a distillation system consisting of a distiller 9 and a water separator 10. The purified solvent from which water has been separated is returned to the solvent tank 2 and reused.

Dry cleaning equipment for small-scale laundry is used as a single unit as shown in Figure 2, but in facilities such as nuclear power plants that handle a large amount of laundry and have multiple dry cleaning machines, If auxiliary equipment such as filter coolers and distillers are shared, it will be advantageous in the following aspects.

1. There are fewer components, making maintenance and management easier.

2. The space required per unit is reduced.

3 The main parts of the cleaning equipment have become smaller,
Work efficiency is improved because equipment can be brought closer together.

FIG. 3 shows an example in which the distiller 9 is shared by a plurality of dry cleaning machines. The washing process is carried out in the same manner as described in FIG. 2 and is as follows.
The solvent held in each dry cleaning machine is collected in a distiller 9, distilled, and then distributed to each dry cleaning machine solvent tank 2 via a water separator 10 by a pump 12 and piping 13. The solvent used for distillation contains water migrated from soap and clothing to enhance the cleaning effect, and sometimes water is added to the solvent to enhance the cleaning effect of water-soluble stains. If soap is present in the solvent, it will easily foam during distillation, and if the boiling points of the water and solvent are significantly different and the specific gravity of the solvent is greater than that of water (e.g., a soft solvent), the inside of the distiller will be in two phases. It separates and forms an aqueous layer with a high boiling point at the top, making bumping more likely.

Therefore, in order to prevent accidents caused by these abnormal phenomena, distillers are usually designed with a large horizontal cross-sectional area and a large diameter, approximately twice the maximum capacity for solvent. distiller is used. The amount of solvent used for distillation increases due to shared use, and the capacity of a single distiller also becomes very large. In addition, since solvents containing radioactive substances are distilled, special quality control is required during production, and the cost increases as the size increases, making the miniaturization of distillers a major issue.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the distiller of dry cleaning equipment for nuclear power plants, and to provide a dry cleaning equipment that has a smaller distiller and is easier to maintain and manage.

[Key points of the invention]

According to the present invention, the above object is achieved by providing a solvent receiving tank having a water separation function between the distiller and the solvent tank of a dry cleaning equipment equipped with a plurality of dry cleaning machines and one distiller, and disposing of the used solvent. This is achieved by receiving the water in a solvent receiving tank and separating it into water and solvent, and then distilling only the solvent in the distiller.

[Embodiments of the invention]

An embodiment of the present invention will be explained based on FIG. In Fig. 1, D ₁ , D ₂ , ..., _Dr indicate dry cleaning machines, and each dry cleaning machine has a washing drum 1 into which items to be washed are loaded and washed, and a solvent tank 2 storing cleaning solvent. , a circulation system consisting of a pump 3 that circulates the solvent, a film 4 that removes contaminants transferred into the solvent, a fan 5 that circulates hot air necessary for drying, and a lint filter that removes cotton waste contained in the hot air. 6. A hot air system consisting of a heater 8 that remains in the object to be washed and generates hot air; a distillation system that distills the solvent through a common distiller 9 and separates water from the solvent by a water separator 10; It is provided with a switching valve 11 which acts as a valve and switches between a circulation system and a distillation system, and a common solvent receiving tank 12 between the distiller 9 and the solvent tank 2.

In the dry cleaning equipment according to the present invention, the used solvent used to clean the items to be washed is collected in a solvent receiving tank 12, water is separated from the solvent, and then the solvent is entered into a distiller 9 and distilled. The distilled solvent is pumped into each solvent tank.
3 and pipe 14 for reuse.
In addition, in order to perform water separation continuously, the solvent receiving tank 12
A small water separator may be provided between the distiller 9 and the distiller 9.

The structure of the solvent receiving tank 12 has two outlet ports at different heights at the top, and the mixed liquid of water and solvent collected in the tank is drained upward due to the difference in specific gravity between the water and the solvent. Taking advantage of the fact that the heavy solvent accumulates below, take out the water from the outlet at the top of the tank.
The solvent is taken out from the outlet at the bottom of the tank.

[Field of application of the invention]

The present invention has described a dry cleaning device that distills and purifies contaminated solvent and reuses it using a distillation tank and a distillation device common to multiple dry cleaning machines, but in the case of an emulsion type dry cleaning device, a single machine However, it is applicable.

Emulsion type dry cleaning equipment is a method of washing items by adding 5 to 20% water to a solvent in order to compensate for the disadvantage of dry cleaning in that water-soluble stains cannot be removed. The equipment configuration is
It is the same as the one shown in Figure 3, but since the solvent contains a large amount of water, bumping is likely to occur, making it difficult to downsize the distiller, and the distiller's capacity is approximately twice the maximum storage capacity. ing.

When the present invention is applied to emulsion-type dry cleaning, a solvent receiving tank with a water separation function may be provided between the pump 3 and the distiller 9 shown in Fig. 3, and the combined capacity of the distiller and the solvent receiving tank may be It can also be made smaller than conventional distillers. In this case, compared to a dry cleaning machine, the amount of water present in the solvent is much larger and there is a greater risk of bumping, but this risk can be eliminated by providing a solvent receiving tank.

〔Effect of the invention〕

According to the present invention, by providing a solvent receiving tank with a water separation function between each dry cleaning machine and the distillation machine, it is possible to provide a small-sized distillation machine without the risk of foaming or bumping.

2. Because it is a small-sized distillation, there is very little wasted space, and the thermal efficiency is high, resulting in energy savings.

3 Conventional distillers have a capacity that is approximately twice the maximum capacity in order to eliminate the effects of foaming, bumping, etc. However, the capacity of the solvent receiving tank can be equal to the maximum capacity, and the distiller can also be used for distillation. Since the distiller only needs to be of a size commensurate with its capacity, the distiller can be made smaller than the conventional distiller even if both are combined, and the space can be narrowed down.

4. Equipment that is easily contaminated with radioactive materials is the distiller, and its miniaturization reduces the contaminated area and makes maintenance pipes easier.

As described above, by providing a common solvent receiving tank, space can be reduced and operation and maintenance can be streamlined.

[Brief explanation of the drawing]

Figure 1 is a system diagram of dry cleaning equipment for nuclear power plants according to an embodiment of the present invention, Figure 2 is a system diagram of a conventional dry cleaning machine, and Figure 3 is a system diagram of conventional dry cleaning equipment for nuclear power plants. be. 1...Washing drum, 2...Solvent tank, 3...
Pump, 4... Filter, 5... Fan, 6...
Lint filter, 7... Condenser, 8... Heater,
9... distiller, 10... water separator, 11... switching valve, 12... solvent receiver tank, 13... pump, 14...
…Piping.

Claims (1)

[Claims] 1. A washing drum that rotates with items to be washed, a circulation system that circulates and supplies solvent from a solvent tank to the washing drum, and a drying system that dries the washed items while circulating hot air through the washing drum. In addition to installing multiple dry cleaning machines consisting of
In a dry cleaning facility equipped with one distiller for distilling used solvent, a solvent receiving tank having a water separation function is provided between the distiller and the solvent tank, and the used solvent is received in the solvent receiving tank and water is removed. 1. A dry cleaning equipment for a nuclear power plant, characterized in that, after separating into a solvent and a solvent, only the solvent is distilled by the distiller.