JP2002066498A - Cleaning method for container and member containing organic chlorine compound pcb oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new cleaning method which makes containers and members containing PCB, i.e., organic chlorine compounds, harmless and is simple, economical, and capable of treating in a short time. SOLUTION: An apparatus is used which comprises tank A, tank B, a vacuum pump, tank C, and an ultrasonic apparatus, an electrostatic induction apparatus, and an electric heater installed at the bottom of tank A. An object to be treated, i.e., a container or member containing a PCB oil, is opened and is put into tank A. While the object is being heated at 60-80 deg.C by the electric heater, the PCB oil is sucked from tank A into tank B with the vacuum pump, and the valve of tank B is opened to send the oil into tank C and simultaneously a carbon dioxide gas is injected into tank A. Then, an ultrasonic wave is applied to clean the object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the cleaning of containers and parts containing PCB oil, and the use of organic chlorine compounds (PCB oil).
And cleaning treatment of the contents.

[0002]

2. Description of the Related Art There is no washing of containers and components containing PCB oil, and even if there is, the solvent is washed by a high-pressure pump, but only by a high-pressure pump jet device. Although the surface can be cleaned, it is not possible to clean the core of PCB oil-filled containers, members and other dirt in the gaps, insulating paper, ceramic, iron, aluminum and the like.

[0003] In the past, there was an era when fluorocarbon gas was used for cleaning dirt on general equipment, but since fluorocarbons were regarded as a global environmental pollutant and were banned from use, commercially available nitrogen gas and pure carbon dioxide were used. Gas is used.

In the case of a transformer, for example, in the case of a transformer, a varnish in which a varnish having a different internal structure is infiltrated into paper or cloth and a varnish itself are placed in a container or a member containing a PCB. There is also a varnish transformer, which is a case, iron, copper wire, magnet, gasket,
Insulation paper (kraft paper and adhesive paper, cloth, wood, daclaire), etc. are included, making it difficult to treat. Currently, PCB oil in containers is extracted and the liquid is detoxified. There are no containers or parts.

[0005]

[Problems to be Solved by the Invention] PC of organochlorine compound
B is a compound of polychlorinated biphenyl (hereinafter referred to as PC
PCB is a chemically safe substance, is widely used worldwide for its non-combustibility, and is used for electrical insulation and as a heat medium. Transformers, transformers, condensers, heat exchangers, safety devices, pressure-sensitive It has been widely used in copiers and the like. 70-80% of it has been used for electrical insulation and heat transfer. In Japan, the Kanemi Yusho incident occurred in the 1968 fiscal year, and PCBs are harmful to humans and are designated as environmental pollutants.

[0006] In recent years, various studies have been conducted in various fields due to a long storage time, which has become a social problem due to powder loss and illegal dumping of containers. PCB oil has been proven to be harmless for liquids, but there is no treatment for containers and materials. In liquid processing, the present inventors have also demonstrated and received evaluations of national processing standards.

[0007]

Means for Solving the Problems There is a method for treating the liquid of the PCB, but there is no container, and a high-pressure pump is used for the alkali,
Even if the catalyst and water are added and the washing process is performed, when the container is not completely washed, drainage occurs, soil is contaminated,
In addition, PCB oil is a vaporizable substance, so if it is extracted or washed in the atmosphere at 1 atmosphere, dioxin is generated, which causes new secondary pollution, which is inconvenient. In addition, the technique of cleaning members is a means for solving the problem that has been found to be a difficult social problem.

It is an object of the present invention to provide a new processing method which is simple, economical and has a short processing time.

The present invention is a method for detoxifying containers and members containing PCBs of organochlorine compounds. In the present invention, first, a tank (hereinafter, referred to as an A tank) for storing a PCB and components in the A tank, an ultrasonic device and an electrostatic induction device are installed at a lower portion and a bottom portion of the A tank, and a vacuum pump is added. The tank for receiving the oil sent from A is constituted by a B tank (hereinafter referred to as B tank), a tank for storing oil flowing from A to B safely (hereinafter referred to as C tank), and the like. Tanks A and B are pressure vessels, and tank C is a normal pressure tank.

The non-processed material in the A tank is maintained at a temperature of 50 to 80 ° C. and carried out in an anoxic tank to obtain a non-processed material.
It will be a device that absorbs 9% oil, and it is a safe washing process method that does not cause dioxin or fire due to the sealed type. This is a safe and reliable PCB container and a method for cleaning members, in which oil flowing from tanks A and B via a vacuum pump is transferred to a C tank by opening a B tank valve.

[0011] The container containing the PCB and the components
It is physically difficult to clean and wipe off the PCB oil in the gap of the equipment completely harmless, and it is not a conventional technology. Therefore, in the present invention, the non-processed material in the container is
The oil flowing into tanks A and B is temporarily stored in tank C. The subsequent liquid PCB is disclosed in Japanese Patent Publication No. 2948.
No. 581 detoxification process,

[0012] A container containing a container and members in A tank,
In the tank, calcium hydroxide, methylene chloride, kurtene, water, and a mixed solution were heated as a solvent in a tank at a temperature of 50 to 80 ° C., while an ultrasonic device installed in the lower bottom of the tank A and a static liquid were added to the tank. Turn on the power to the inductor.

[0013] As the evacuation of the vacuum vessel progresses, the number of gas molecules in the vessel decreases, and the number of molecules colliding with the surface of the solid placed in the vessel also decreases significantly. It is possible to delay contamination and chemical changes of the surface by foreign molecules.For example, in the semiconductor device industry, which has recently developed rapidly, by performing processing in a vacuum for the production of a device using a semiconductor surface, Stabilizes device performance. In this way, operations that are impossible in the atmosphere can be performed in a vacuum, and vacuum technology is applied to the basics of electronics as necessary,
It is applied to the processing of containers and components contained in PCB containers. Currently, the level of vacuum we can freely obtain on the ground is on the order of a satellite orbit at an altitude of 1000 km. As a result, altitudes have been experimentally obtained at a vacuum level, for example, between the earth and the moon. Space laboratories that make satellite and space shuttle on-board equipment on the ground are called space chambers, which are also important vacuum equipment.

The ultrasonic and electrostatic induction devices installed at the bottom of the tank A have been able to wash the insides of precision-machined parts and sintered metals of complicated shapes such as automobiles and precision parts and watches related to chemistry. And machine parts were cleaned and assembled as products. Being able to wash it afterwards leads to significant cost reductions, and in the case of sintered metal, it is also used to knead metal powder. In addition, plasticizers and oils can be extracted and degreased. In addition, the present researcher applies the fact that the work of extracting the insulating material of the electrode from the battery is actually used, and also applies the ultrasonic wave to the present invention,
Attaching ultrasonic and electrostatic induction (Shine Electronics) to the bottom of the A tank, which generates dirt in containers and members, especially oils, and generates sudden fine bubbles, adsorbing on metals, insulating paper, and ceramics. It was found that the oil was drained and pulled out.

In the present invention, chlorofluorocarbon should be considered for cleaning the container containing the PCB and components, but chlorofluorocarbon has been banned from use due to substances that pollute the global environment. Can not be used due to the substance and can prevent the global environment. I thought about using carbon dioxide for cleaning. For the purpose and purpose of carbon dioxide gas, adding carbon dioxide gas during the production of precision parts can reduce the manufacturing cost, and also allows cleaning inside the structure. Instead of using sonic waves and carbon dioxide as carbon dioxide, safer carbon dioxide is used because it has been used for a long time. Therefore, it has been found that carbon dioxide is applied and used for the non-cleaning object of the present invention. Further, the effect can be further improved by injecting carbon dioxide into a special pressure vessel containing a cleaning object and adding a pneumatic device of 100 atm for cleaning. In addition, as described in 0014, the inventors have found that the dirt is peeled off by ultrasonic waves and an electrostatic induction device, and the oil component (PCB oil) is dissolved by carbon dioxide gas. Furthermore, in the present invention, it is not dissolved by the surfactant due to circulation. He also discovered that the substance could be wrapped and pulled out.

In the present invention, a catalyst is used for cleaning as a substitute for the chlorofluorocarbon cleaning in the present invention, so that carbon monoxide is generated. It has been found that a gaseous substance obtained by decomposing PCB is neutralized with an alkali, adsorbed on activated carbon and slaked lime, and then carbon dioxide discharged to the atmosphere is washed and concentrated, and used for the container cleaning agent of the present invention.

It has also been found that after the cleaning gas body, the cleaning material is transferred to a discharge cylinder to separate the liquid from the waste and carbon dioxide, and the carbon dioxide is collected in a recovery cylinder and reused.

[0018]

DETAILED DESCRIPTION OF THE INVENTION PCBs of organochlorine compounds have been used in heat exchangers because they are chemically stable, but in recent years it has been confirmed that the substance is harmful. As a method of processing the components, that is, extracting the adsorbed oil and dirt inside the container, put the non-processed material in the A tank, set the temperature to 50 to 80 ° C., and press the pressure of the vacuum pump.
The oil from the unprocessed material stored in the A tank and the oil in the B tank were temporarily stored in the C tank at normal pressure.

The waste liquid containing PCB is subjected to detoxification treatment from Japanese Patent Publication No. 2948581.
Patent Publication No. 1999-207299
Patent Publication No. 1999206911

The ultrasonic and electrostatic induction devices are attached to the lower side of the empty tank where there is no oil, the solvent liquid is put into the A tank, and the ultrasonic and electrostatic induction power supply is started. While the carbon dioxide gas is being put into the A tank, the cleaning liquid is flown into the B tank, and the waste liquid (cleaning liquid) is sent to the C tank.

[0021]

[Examples] As a result of performing high-pressure treatment using the apparatus and equipment described above, examples are shown below.

In this example, a hole was first drilled in the upper part of the condenser. To the A tank where the ultrasonic electrostatic induction device was attached to the lower bottom of the A tank, the temperature was kept at 70 ° C from the electric heater containing the condenser while maintaining the temperature.
The B tank was provided, and 99% of the liquid oil could be withdrawn by the vacuum pump pressure, sent to the B tank and stored, and then transferred to the C tank at normal pressure and stored.

The solvent, sodium hydroxide, and water were put into the container A tank of the condenser from which the oil had been removed, and the power switches of the ultrasonic and electrostatic induction devices installed therein were turned on and started to open. There, instead of chlorofluorocarbon as the cleaning medium,
When the tank was put into the tank A and the washing was opened, the sudden bubbles and dirt of the ultrasonic and electrostatic induction devices were peeled off, and the carbon dioxide gas was removed.
Atmospheric pressure was sent in, and the oil component was dissolved with carbon dioxide gas. The condenser dirt was removed efficiently, and the cleaning liquid in tank A was sent to tanks B and C by vacuum pump pressure, and stored in tank C. The PCB-containing waste liquid is subsequently disclosed in Patent Publication 29
No. 48581, it was detoxified.

[0024]

According to the present invention, as described above, by applying heat to a non-processed object with an ultrasonic wave and an electrostatic induction device while heating the PCB container and members, small dirt is removed by fine bubbles, and carbon dioxide is also added. After dissolving the oil and placing the liquid material by vacuum pump pressure in the C tank, wipe the transformer surface with absorbent cotton after washing, wash with alcohol, and heat and analyze. I was able to confirm that there was no such thing. Therefore, it can greatly contribute to the cleaning treatment of PCB containers and members, which has been a social problem for many years.

[Brief description of the drawings]

FIG. A tank (high pressure tank) 2. Ultrasonic device and electrostatic induction device Carbon dioxide inlet 4. 4. Piping lines (a, b, c, d) B tank 6. Vacuum pump 7. C tank 8. Valve 9. Carbon dioxide gas outlet

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C07B 35/06 C07C 25/18 37/06 B09B 3/00 304Z C07C 25/18 ZAB F-term (Reference) 3B201 AA33 BB05 BB82 BB83 4D004 AA21 AA22 AB06 AC05 CA22 CA35 CA40 CA44 CA47 CA50 CB04 CB05 CB32 CB44 CB50 CC01 CC03 CC04 CC09 CC11 CC15 DA02 DA03 DA06 DA07 4H006 AA05 AC13 AC26 BC10 BC11 BE10 BE11 EA22

Claims (5)

[Claims] 1. An A tank and a B tank, a vacuum pump, a carbon dioxide gas, and a structure in which an ultrasonic wave, an electrostatic induction device, and an electric heater are added to the bottom of the A tank. . The non-processed material in the A tank is heated to a temperature of 60 to 80 ° C. by an electric heater, and the non-processed material is pressure-fed from the A tank to the B tank using a vacuum pressure pump and stored in the B tank. Tanks A and B are pressure-resistant tanks, C is a normal pressure tank, and the untreated material of tank B is opened in valve C and stored in tank C. A method for cleaning a container, a member, and the like containing an organic chlorine compound PCB, wherein an electric inductor is installed and carbon dioxide gas is supplied to the A tank. 2. A method for washing containers and members, wherein sodium hydroxide, methylene chloride, curten of the present flour and water are added as catalysts, and heating and high pressure treatment are performed.
Container containing PCB and cleaning method for members. 3. The main purpose of improving the cleaning effect of the container is to generate abrupt fine bubbles by adding ultrasonic waves. Further, it is characterized in that the dirt is peeled off by applying vibration to the electrostatic induction device.
A method for cleaning containers and members. 4. As a substitute for a cleaning technique in place of chlorofluorocarbon for cleaning the container, PCB is made high-temperature and high-pressure, organic substances are made inorganic in claim 2, and a gas generated when decomposed is neutralized with alkali, and activated carbon is removed. A cleaning method characterized by using a bubble of carbon gas and pure carbon dioxide gas discharged into the atmosphere after adsorption on slaked lime to remove oily substances in gaps. 5. The method according to claim 1, wherein the PCB, the container,
A cleaning method comprising cleaning members.