JP2001091693A - Processing device for radioactive washing wastewater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with setting of a filter to dispense with periodic replacement of a filter member or troublesome work such as cleaning, and to efficiently process waste liquid, in a processing device for radioactive washing wastewater processing the wastewater after cleaning and washing an object contaminated with radioactive substance, such as a body or clothes of a worker who worked in a radiation control area. SOLUTION: In this processing device, washing wastewater is sprinkled onto a surface of a rotating heated body 1 supplied with a heating medium 5 inside it by a sprinkler 10 to forcibly grow scale on the surface of the rotating heated body 1. Steam 6 evaporated on the surface of the rotating heated body 1 except the extracted scale is condensed into distilled water. The forcibly grown scale is scraped away from the surface of the rotating heated body 1 by a scraping member 2 and is collected. Thus, desired processing of the washing wastewater is executed. Accordingly, the processing of the radioactive washing wastewater is properly executed with a simple structure without the need to set a filter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating radioactive washing wastewater which cleans those contaminated with radioactive materials, such as the body and clothes of workers working in a radiation control area, and treats the washed wastewater. It is.

[0002]

2. Description of the Related Art An outline of a conventionally used apparatus for treating radioactive wastewater will be described with reference to FIG.

[0003] Washing wastewater containing radioactive substances is subjected to evaporative treatment. When the washing wastewater is supplied to an evaporative treatment apparatus, a filter 0 placed in front of the washing wastewater is used to remove solids and organic components.
In step 1, sludge and the like are removed.

[0004] Effluent from which solids and organic components have been removed to some extent is supplied to a portion constituted by communicatively connecting an evaporator 02, a heater 03, and a circulation pump 04.

[0005] That is, the waste liquid supplied from the filter 01 to the evaporator 02 is sent to the heater 03 by the circulation pump 04 and then forms a circulation path returning to the evaporator 02 again. The waste liquid is evaporated by passing the inside of the heat transfer tube 09 and heating the surroundings with the heating steam 05 supplied from the outside.

[0006] The vapor evaporated in this manner is circulated to the evaporator 02, taken out of the evaporator 02 as vapor 06, reaches the condenser 07 via the rectification column 010, is cooled by the cooling water CCW, and is distilled water 08 It is taken out as outside.

[0007] A part of the distilled water 08 is supplied to the rectification column 010 by a distilled water pump 011 and sent to a distilled water cooler 012 to be further cooled. Reference numeral 013 denotes a vent condenser for cooling and condensing the vapor separated by the condenser 07 for drain separation.

[0008]

As described above, in the conventional apparatus, in order to prevent the oil and the like contained in the washing drainage from adhering to the inner surface of the heat transfer tube 09 of the heater 03 as a scale, the performance is lowered. A filter 01 is installed upstream of the apparatus to remove adhering components.
By installing the filter 01 in this way, there is a problem that complicated operations such as periodic replacement and cleaning of the filter member of the filter 01 occur.

If the use of the filter 01 is withdrawn in order to avoid such a complicated operation, it is inevitable that the heat transfer tube 09 adheres to the scale as described above. If the scale adheres to the inner surface of the device, it is necessary to open the device and perform a scale removing operation, and the like, and the like.

[0010] The present invention eliminates such problems in the conventional apparatus for treating radioactive washing wastewater, eliminates the need for installing a filter, and eliminates the need for complicated work such as regular replacement or cleaning of a filter member, thereby improving efficiency. SUMMARY OF THE INVENTION It is an object of the present invention to provide a radioactive washing wastewater treatment apparatus which is adapted to perform wastewater treatment.

[0011]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems. As a first means, a rotary heating body into which a heating medium is supplied, and a rotary heating body having a surface provided on the rotary heating body. A spraying device for sprinkling the washing wastewater, a scraping member arranged so as to be able to contact the surface of the rotary heating body and scraping scale condensed on the surface of the rotary heating body, a condensing device for steam evaporating on the rotary heating body surface, It is an object of the present invention to provide an apparatus for treating radioactive washing wastewater, comprising a device for collecting scales scraped off by a scraping member.

In other words, according to the first means, a scale is forcibly generated on the surface of the rotary heating body by sprinkling the washing drainage on the surface of the rotary heating body with the spraying device, and the scale component is removed. By condensing the vapor extracted and evaporated from the surface of the rotary heating element to obtain distilled water, the scale forcibly generated as described above is scraped off from the surface of the rotary heating element by the scraping member and collected. It treats washing wastewater, eliminates the need for filter installation, eliminates the hassle and time required for maintenance work such as filter replacement and cleaning, and performs appropriate radioactive washing wastewater treatment with a simple configuration. It is like that.

Further, the present invention provides, as a second means, the first means.
In the above-mentioned means, the rotary heating body is constituted by a hollow disk or a drum.

That is, according to the second means, a hollow disk or a hollow drum is used as a heating rotator for forcibly generating scale by sprinkling washing water,
Since the heating medium is supplied to the hollow portion of the disk or the drum, the scale is effectively condensed on the surface of the disk or the drum, and the scale is effectively removed in cooperation with the scraping member. In addition, a disc or a drum is selected according to the layout of the equipment, the equipment space, and the like, so that appropriate treatment of the radioactive washing drainage is performed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. FIG. 1 schematically illustrates the entire configuration of a radioactive washing wastewater treatment apparatus according to the present embodiment.

Reference numeral 1 denotes a disk, which is rotatable by a drive unit (not shown). The inside of the disk is hollow, and a heating steam 5 is supplied from an appropriate steam source provided outside. ing.

A scraping blade 2, which is a scraping member, is disposed in close proximity to the surface of the disk 1 so as to be in contact with the surface. Is provided.

Reference numeral 3 denotes a circulating tank for temporarily storing the radioactive washing wastewater and for storing the washing wastewater dropped from the surface of the disk 1 without condensing the scale or evaporating the water. The circulation pump 4 constitutes a path for supplying the spraying device 10.

Above the disk 1, there is provided a device for collecting and receiving the vapor evaporating on the surface of the disk 1. Downstream of the device, the steam 6 collected in the device is condensed to produce distilled water 8. A gain capacitor 7 is provided.

Reference numeral 9 denotes a product tank, which is a scraping blade 2
And is provided for receiving a scale scraped from the surface of the disk 1 by the scraping blade 2.

In the present embodiment constructed as described above, the surface of the disk 1 heated by the heating steam 5 and rotated by a drive unit (not shown) is placed on the surface of the Is sprinkled from the spraying device 10.

The washing wastewater is evaporated and dried on the rotating disk 1, and the scale is condensed on the surface of the disk 1. The scale is scraped off by the scraping blade 2 and collected in the product tank 9. The scale can be removed from the surface of the disk 1, that is, the heat transfer surface.

On the other hand, the vapor component sprinkled from the spraying device 10 onto the surface of the disk 1 and evaporated on the surface of the disk 1 is collected by an appropriate device and converted into vapor 6 as a condenser 7.
, And is taken out as distilled water 8 which is condensed and purified in the condenser 7.

As described above, according to the present embodiment, the scale is forcibly generated by sprinkling the washing drainage containing organic matter such as oil on the surface of the disk 1 forming the open heat transfer surface. Scraping and removing the scale,
Further, if scale remains on the heat transfer surface, it may be washed, so there is no need to remove organic matter such as oil prior to this treatment.

The removal of the scale by scraping is a very appropriate means, and the removal of the scale proceeds without fail.
The heat transfer performance is not significantly reduced due to the adhesion of scale to the heat transfer surface, and since the heat transfer surface can be formed as an open type, cleaning is very important when removing residual scale attached to the heat transfer surface. It is easy to do.

Unlike the conventional apparatus described with reference to FIG. 3, it is not necessary to install a filter for performing pre-treatment, and there is no need for the periodic replacement of the filter member in the filter apparatus or the complicated work related to maintenance management such as cleaning. Thus, it is possible to obtain a radioactive washing wastewater treatment apparatus capable of efficiently treating wastewater.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. FIG. 2 schematically illustrates the entire configuration of the radioactive wastewater treatment apparatus according to the present embodiment.

In order to avoid redundant description, the same parts as those in the first embodiment described above are denoted by the same reference numerals in the drawings, and redundant description will be omitted as much as possible. The points specific to the form will be mainly described.

That is, in the present embodiment, a hollow drum 11 is employed in place of the disk in the first embodiment, and the heating steam 5 is supplied into the hollow drum 11 so that the circumference of the drum 11 is changed. The scale is forcibly generated from the washing wastewater by using the surface as a heating surface, and vapor is evaporated.

Since the heating area of the drum 11 is relatively large as compared with that of the disk, it is suitable as a device having a large processing capacity. Because there is a difference in
It can be appropriately selected according to the layout of the entire apparatus including other related devices.

The remaining structure, operation, and effects are all the same as those of the first embodiment, so that the description relating to the first embodiment will be fully referred to and redundant description will be omitted. .

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

[0033]

As described above, according to the first aspect of the present invention, a rotary heating body to which a heating medium is supplied, a spraying device for sprinkling washing drainage on the surface of the rotary heating body, and a rotary heating body A scraping member that is disposed so as to be in contact with the surface of the body and scrapes scale condensed on the surface of the rotary heating body, a condensing device for vapor evaporating on the surface of the rotary heating body, and a scale that is scraped by the scraping member. Since the treatment device for the radioactive washing wastewater is configured with a collecting device, the washing wastewater is sprinkled with a spraying device on the surface of the rotating heating body to forcibly generate scale on the surface of the rotating heating body, Also,
The same scale is extracted and the vapor evaporated on the surface of the rotary heating element is condensed to obtain distilled water, and the scale forcibly generated as described above is scraped off from the surface of the rotary heating element by the scraping member and collected. By doing so, the intended cleaning and drainage treatment is performed, and there is no need to install a filter, and there is no need for a lot of time and labor required for maintenance work such as filter replacement and cleaning. It was able to treat radioactive washing wastewater.

According to a second aspect of the present invention, in the first aspect of the present invention, the rotary heating element employs a hollow disk or drum to constitute a radioactive washing wastewater treatment apparatus. Therefore, a heating medium is supplied to the hollow disk or the hollow portion of the hollow drum adopted as a heating rotator for spraying the washing wastewater to forcibly generate the scale, and the scale is applied to the surface of the disk or the drum. Forcibly condensed, effectively removes scale in cooperation with the scraping member, and selects a disk or drum according to the layout of the equipment, equipment space, etc., and appropriately treats radioactive wastewater Can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing an entire configuration of a radioactive laundry drainage treatment apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory view schematically showing an entire configuration of a radioactive laundry drainage treatment apparatus according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an outline of a conventional apparatus for treating radioactive washing wastewater.

[Explanation of symbols]

 01 Filter 02 Evaporator 03 Heater 04 Circulation Pump 05 Heated Steam 06 Steam 07 Condenser 08 Distilled Water 09 Heat Transfer Tube 010 Rectification Tower 011 Distilled Water Pump 012 Distilled Water Cooler 013 Vent Condenser 1 Disk 2 Sharpening Blade 3 Circulation Tank 4 Circulation Pump 5 Heated steam 6 Steam 7 Condenser 8 Distilled water 9 Product tank 10 Sprayer 11 Drum

Claims (2)

[Claims] 1. A rotating heating body into which a heating medium is supplied, a spraying device for sprinkling laundry drainage on a surface of the rotating heating body, and a spraying device arranged to be in contact with the surface of the rotating heating body, A scraping member for scraping the condensed scale, a condensing device for vapor evaporating on the surface of the rotary heating body, and a collecting device for the scale scraped off by the scraping member. Processing equipment. 2. The apparatus according to claim 1, wherein the rotary heating element is formed of a hollow disk or a drum.