JP2001162234A - Apparatus for boiling down contaminated washing liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a boiling-down apparatus performing the boiling-down work of a contaminated washing liquid to remove a contaminant without stopping the steam generating work in a stream generating tank and always supplying vapor of high purity from the vapor generating tank to efficiently and well perform the steam washing treatment of an object to be washed and the distillation/regeneration treatment of the washing liquid and capable of being arranged to an existing vapor generating tank. SOLUTION: A boiling-down container 34 is connected to a vapor generating tank communicating with a supply part of a washing liquid 21 and having a liquid control mechanism and a heating mechanism. This boiling-down container 34 can be evacuated by a pressure reducing mechanism. The boiling-down container 34 and the vapor generating tank are made possible to communicate with each other through an on-off valve 40 and a waste liquid discharging drain 41 is formed to the boiling-down container 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam cleaning apparatus for an object to be cleaned such as an electronic part, a mechanical part, and a medical device, a distillation and regeneration apparatus for a contaminated cleaning liquid, and other steam generators. The present invention relates to an apparatus for boiling down a contaminated cleaning liquid, capable of removing dirt components and continuously generating high-purity steam.

[0002]

2. Description of the Related Art Conventionally, fluorine-based, chlorine-based, hydrocarbon-based,
There has been an apparatus for vaporizing a cleaning liquid such as a silicone-based solvent or alcohol, and performing vapor cleaning of an object to be cleaned and distillation and regeneration of a contaminated cleaning liquid. In these apparatuses, when the dirt component of the cleaning liquid is accumulated to the limit by repeating each process, the cleaning liquid is boiled down to remove the dirt component. A series of steps of this conventional boil down work,
A description will be given of a steam cleaning apparatus that performs steam cleaning under atmospheric pressure.

As shown in FIG. 7, this steam cleaning apparatus includes a liquid supply controller (not shown) provided inside a steam cleaning tank (2) which can be closed with a lid (1). 3) cleaning solution
(4) can always be introduced. And steam cleaning tank
The cleaning solution (4) in (2) is heated with a heating element (5) and a temperature sensor (6).
Cleaning steam is generated by heating with a heating mechanism consisting of In addition, this cleaning steam is supplied to a steam cleaning tank (2).
After being condensed by a cooling mechanism (8) provided on the upper part of the tank, it is collected in a condensed liquid storage tank (10) provided outside.

[0004] The cleaning steam is condensed by coming into contact with the object to be cleaned (7) stored in the steam cleaning tank (2), thereby performing steam cleaning and processing adhered to the object to be cleaned (7). Oil and dirt particles are washed away. When the condensed liquid containing these dirt components falls, the cleaning liquid (4) filled in the steam cleaning tank (2) is contaminated. When the cleaning steam of the object to be cleaned (7) is repeated, the degree of contamination of the cleaning liquid (4) in the steam cleaning tank (2) gradually increases. It becomes difficult to do.

[0005] Therefore, when the contamination exceeds the limit, the cleaning operation of the object to be cleaned (7) is stopped, and the contaminated cleaning liquid (4) is continuously heated in the steam cleaning tank (2). I was working. The steam washing tank
In (2), a concentrate of the soil component remains. This concentrate was discharged from the steam washing tank (2) to the outside via the drain (11). Thereafter, a cleaning liquid (4) free from contamination is introduced into the steam cleaning tank (2) from the supply unit, and then heated by heating means to generate high-purity cleaning steam, thereby cleaning the object (7) to be cleaned. The steam cleaning process was restarted. Also, during the boil-down operation, steam is generated from the contaminated cleaning liquid (4).

[0006]

However, since the steam generated during the boil-down operation is low in purity and not suitable for precise steam cleaning, it has to be released into the atmosphere or collected by a condenser or the like. Cleaning work was interrupted. Also, after the boil-down operation, the waste liquid discharge operation and the steam cleaning tank (2)
A time for refilling the inside with the cleaning liquid (4) was required. Further, after filling with the cleaning liquid (4), cleaning steam could not be generated immediately, and it was necessary to heat for a certain period of time. During that time, the steam cleaning process could not be performed. In this way, the steam cleaning work was interrupted for the boil down operation,
It was inefficient because a lot of time was lost before resuming work.

[0007] A contaminated cleaning solution (4) under atmospheric pressure
When boil-down operation is carried out by heating to a high temperature, if the boil-down temperature is too high, there is a problem that when the boil-down temperature is too high, a thermal decomposition reaction occurs, toxic gas is generated, and environmental pollution is caused. Further, chlorine compounds are easily generated in the waste liquid after boiling. In such waste liquids containing a large amount of chlorine compounds, a large amount of dioxin is generated at the time of incineration treatment, which also causes a problem of environmental pollution. Therefore, the boiling temperature cannot be set too high,
The boil-down operation took time, and as a result, the restart of the steam cleaning operation was delayed, which was inefficient.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to perform a boil-down operation of a contaminated cleaning solution without interrupting a steam generation operation in a steam generation tank, and to efficiently remove a dirt component from the steam generation tank. It is assumed that. And it is possible to continuously supply high-purity cleaning steam in the steam generation tank,
It is intended to improve work efficiency. In addition, the cleaning liquid is efficiently recycled, resources can be saved, and at the same time, the generation of harmful substances due to the boiling operation is suppressed to prevent environmental pollution.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a heating mechanism is arranged in a steam generating tank provided with a liquid level control mechanism, which is in communication with a cleaning liquid supply section. The tank is connected to a boiler container that can depressurize the inside with a decompression mechanism, and this boiler container and the steam generation tank can be connected through an open / close valve, and a drain for discharging waste liquid is formed in the boiler container. It consists of

[0010] The boiled-down container may be arranged in a steam generating tank, and the contaminated cleaning liquid may be heated by a heating mechanism in the steam generating tank.

[0011] The boiled-down container may be formed by dividing the inside of the steam generating tank by dividing walls.

Further, the boiling container may not be disposed in the steam generating tank, but may be formed with a heating mechanism separately from the steam generating tank.

Further, the boiling container may be connected to a condenser capable of recovering steam generated during the boiling operation.

Further, the steam generation tank may be a steam cleaning tank for performing steam cleaning of an object to be cleaned in a steam generation section.

Further, the steam generation tank may be a distillation regeneration tank for performing distillation regeneration of the cleaning liquid in the steam generation section.

[0016]

The present invention is constructed as described above, and the cleaning liquid in the steam generating tank is heated by a heating mechanism to be vaporized. If the steam generation tank is, for example, a steam cleaning tank, the steam comes into contact with an object to be cleaned arranged in the tank and is condensed and liquefied. The condensed liquid is used to wash off dirt components such as processing oil and dirt particles attached to the object to be cleaned, thereby performing a steam cleaning process. And this dirt component falls into the cleaning liquid in a steam cleaning tank. On the other hand, with the decrease of the cleaning liquid in the steam generation tank, a cleaning liquid having no or little contamination is introduced from the supply unit into the steam generation tank by the liquid level control mechanism. Then, by repeating the steam cleaning process, the dirt component gradually flows into the steam generation tank.

If the steam generating tank is a cleaning and regenerating tank for cleaning liquid, a contaminated cleaning liquid that condenses and liquefies on the surface of the object to be cleaned and cleans the object to be cleaned is introduced into the distillation and regenerating tank. The contaminated cleaning liquid is vaporized in the steam generation tank, then condensed in a condenser or the like, and regenerated as a high-purity cleaning liquid. Further, the dirt component remains in the steam generation tank. Also in this case, the contaminated cleaning liquid is continuously introduced into the distillation regeneration tank from the supply unit.

As described above, if the cleaning liquid in the steam generating tank is contaminated with a dirt component, the purity of the cleaning steam generated in the tank is reduced. It is necessary to purify the cleaning liquid in the steam generation tank by using the boiling apparatus. To do so, first, an opening / closing valve between the steam generation tank and the boiling container is opened while the steam generation processing is being performed in the steam generation tank. By this valve opening, the contaminated cleaning liquid containing the dirt component in the steam generation tank,
Spills into boiling containers. Then, when a certain amount of the contaminated cleaning liquid is introduced into the boiling container, the open / close valve is closed and the pressure reducing mechanism is driven to reduce the pressure in the boiling container.

Under this reduced pressure, the contaminated cleaning liquid in the boiling container is heated. This heating may be performed by a heating mechanism provided in the boiling container, or a heating mechanism of a steam generating tank may be used. The heating and the reduced pressure act to contaminate the cleaning liquid in the boiled vessel efficiently. By discharging this steam from the boiling container to the outside, the boiling operation under reduced pressure is performed smoothly.

As described above, by transferring the contaminated cleaning liquid to the boiling container, a part of the contaminated components in the steam generating tank is removed. In addition, with the transfer of the contaminated cleaning liquid to the boiling container side and the reduction of the cleaning liquid due to the generation of steam, a new cleaning liquid is introduced from the cleaning liquid supply unit by the liquid level control mechanism in the steam generation tank, and the cleaning liquid in the steam generation tank Improve pollution degree. Therefore, it is possible to continuously generate high-purity steam in the steam generation tank.

This boiling operation can be performed repeatedly during the steam cleaning or distillation regeneration process without interrupting these processes. That is, when the amount of the dirt component in the cleaning liquid increases, the opening / closing valve is opened again to transfer the contaminated cleaning liquid in the steam generation tank to the boiling container, perform the boiling operation, and supply the supply unit into the steam generation tank. A new cleaning solution is introduced from.

[0022] By repeating the boiling operation, waste liquid in which the dirt component is concentrated remains in the boiling container.
If the amount of waste liquid increases, stop the boil-down operation,
Release the vacuum in the boiling container. Then, by opening the drain for discharging the waste liquid, the concentrate in the boiled container is discharged to the drain side, and later disposed of by a method such as incineration.

As described above, the washing operation is repeated, and the cleaning liquid is newly supplied from the supply unit, so that the contamination level of the cleaning liquid is suppressed to a low level in the steam generating tank, and the purity of the steam generated in the tank is good. Is kept. Using this high-purity steam, a steam cleaning process and a distillation regeneration process are precisely performed in the steam generation tank. In addition, since there is no need to interrupt the processing in the steam generation tank during the boil-down operation, it is possible to efficiently perform steam washing and distillation regeneration.

In the present invention, the boiling point of the cleaning liquid can be lowered because the boiling operation is performed under reduced pressure. Therefore, even if the difference between the boiling temperature and the boiling point is increased, the boiling can be performed at a temperature at which the chlorine-based organic solvent or the like does not cause thermal decomposition. As a result, vaporization of the contaminated cleaning liquid is promoted, so that efficient boil-down operation can be performed, and generation of harmful gas and harmful substances in waste liquid can be prevented. Also,
By the boiling operation at the low boiling point, the amount of the chlorine compound generated in the waste liquid is also reduced. Therefore, when waste liquid is incinerated, dioxin is hardly generated, and environmental pollution can be prevented.

The steam generating tank may be newly provided with a cooking device for the present invention. However, it is also possible to manufacture only the cooking device and install it in an existing steam generating tank. Therefore, low-cost introduction becomes possible. In this case, since the pressure reducing mechanism is connected to the boiling device itself, it can be installed in a steam generating tank having low pressure resistance used under atmospheric pressure. Of course, the boiling device can be installed in a steam generating tank which is used under reduced pressure and has excellent pressure resistance.

Further, the boiled-down container may be formed separately from the steam generation tank, and may be disposed in the steam generation tank for use. In such an apparatus, the cleaning liquid heated in the heating mechanism of the steam generation tank also heats the contaminated cleaning liquid in the boiling container, so that the cleaning operation of the contaminated cleaning liquid can be performed efficiently.

The boiled-down container may not be formed separately from the steam generating tank, but may be formed by dividing the inside of the steam generating tank by dividing walls. Also in this case, if the contaminated cleaning liquid inside the boiling container is heated using the heating mechanism of the steam generating tank, efficient boiling operation can be performed.

The boiled container may be provided outside the steam generating tank. In this case, by providing the heating mechanism in the boiling container separately from the heating mechanism of the steam generating tank, it is possible to efficiently boil the contaminated cleaning liquid.

If the generated cleaning liquid is harmless, such as water or alcohol, and the vapor is not reused, the vapor may be released to the atmosphere, but the vapor contains harmful substances. If there is a risk of being reused or if it is desired to reuse it as a cleaning solution, perform a recovery process without releasing it to the atmosphere. And the condenser for this vapor recovery may be connected to a boiling container. In this case, when steam is generated in the boiling container, the steam is sent to the condenser by the suction force of the pressure reducing mechanism. Then, the steam is cooled in the condenser and condensed and liquefied. This condensate has a higher purity than when it is boiled down under atmospheric pressure, but it may not be used for precise steam cleaning as it is. Can be reused as As described above, by efficiently collecting and reusing the cleaning liquid component by the condenser, it is possible to save resources of the cleaning liquid and the like.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is carried out in a steam cleaning tank for cleaning an object to be cleaned will be described below with reference to FIG. 1. (20) is a steam cleaning tank as a steam generating tank under atmospheric pressure. A conventionally known device that performs a steam cleaning process is used. This steam cleaning tank
(20) contains water, fluorine, chlorine, hydrocarbon,
Appropriate cleaning liquid such as silicone solvent or alcohol (2
1) is filled, and cleaning steam can be generated by a heating mechanism including a temperature sensor (22) and a heating element (23) such as a heating pipe. In addition, a cleaning unit (25) for storing the object to be cleaned (24) and performing a steam cleaning process is provided on the upper side of the steam cleaning tank (20), and a lid ( The object to be cleaned (24) can be taken in and out through an opening (27) that can be sealed at 26).

A cooling unit provided above the washing unit (25)
In (28), the continuously generated cleaning steam is cooled and condensed,
It can be transferred to a condensate storage tank (30) provided outside. The condensate storage tank (30) is provided with a liquid level sensor.
A liquid level control mechanism including a supply valve (31) and a supply valve (32) enables communication with the steam cleaning tank (20). The condensed liquid storage tank is controlled by the liquid level control mechanism.
The condensate in (30) is introduced into the steam cleaning tank (20), and the internal cleaning liquid (21) is maintained at a constant amount.

The steam cleaning tank formed as described above
Inside of (20), a boiled container (34) of the contaminated cleaning liquid (33)
The storage is arranged. The boiled container (34) is a pressure-resistant, airtight container, and the lower side is a cleaning solution for the steam cleaning tank (20).
(21), and the upper part is cleaned (2).
5). Also, in the boiled container (34),
Pressure reducing valve (35), vacuum pump (36), vacuum release valve
The decompression mechanism consisting of (37) is connected to enable decompression inside and release of decompression.

The pressure reducing valve (35) and the vacuum pump (3)
A condenser (38) through which cooling water flows is connected between the apparatus and (6), so that steam generated by the boiling operation can be condensed. The boiled container (34) can communicate with the steam cleaning tank (20) via an open / close valve (40), and is connected to a waste liquid collecting section (42) via a drain (41) for discharging waste liquid. ing.

In the cleaning apparatus constructed as described above, the cleaning liquid (21) is heated by the heating element (23) to clean the object (24) by steam cleaning. Supply steam. The opening (27) is provided in the cleaning section (25).
By arranging the object to be cleaned (24) through the, steam cleaning of the object to be cleaned (24) by cleaning steam is performed. That is, the cleaning vapor is condensed and liquefied on the surface of the object (24) to wash off the processing oil and dirt particles attached to the object (24). The condensate containing the dirt component flows into the cleaning liquid (21) of the steam cleaning tank (20).

Further, with the generation of cleaning steam, a steam cleaning tank
The washing liquid (21) in (20) decreases. Therefore, the liquid level sensor (31) of the liquid level control mechanism and the supply valve (32) are operated, and the cleaning liquid (21) is newly introduced from the condensed liquid storage tank (30) into the steam cleaning tank (20). It is possible to continuously generate cleaning steam.

By repeating the steam cleaning operation as described above, the concentration of the dirt component of the cleaning liquid (21) in the steam cleaning tank (20) increases. If this concentration is high, the purity of the cleaning steam becomes low, and there is a possibility that precise steam cleaning cannot be performed. Therefore, in order to maintain the purity of the cleaning steam, it is necessary to reduce the contamination components in the steam cleaning tank (20).

[0037] The steam cleaning tank (20) and the boil-down vessel are used for generating the cleaning steam in the steam cleaning tank (20).
The on / off valve (40) between the cleaning liquid (34) and the contaminated cleaning liquid (33) in the steam cleaning tank (20) is transferred to the boiling container (34). By this transfer, in the steam cleaning tank (20), the amount of dirt components in the inside decreases, and the liquid level control mechanism operates to introduce a new cleaning liquid (21) from the supply unit.
Accordingly, the degree of contamination in the steam cleaning tank (20) is reduced, and the purity of the cleaning steam generated in the tank can be kept good. And it becomes possible to continue the precise steam cleaning process of the to-be-cleaned object (24) with this high-purity cleaning steam.

On the other hand, on the boiled container (34) side, when a certain amount of the contaminated cleaning liquid (33) is introduced, the open / close valve (40) is closed. Then, by opening the pressure reducing valve (35) and driving the vacuum pump (36), the boiling container (3) is opened.
4) Reduce the pressure inside. By this reduced pressure, a boiled container (34)
The contaminated cleaning liquid (33) is vaporized. The lower part of the boiled container (34) is a cleaning solution for the steam cleaning tank (20).
Since the cleaning liquid (21) heated by the heating element (23) is also immersed in the (21), the contaminated cleaning liquid (33) in the boiling container (34) is also heated, and vaporization is promoted. Becomes

The steam thus generated is introduced into the condenser (38) by the suction force of the vacuum pump (36).
Then, it is cooled by the cooling water of the condenser (38) and collected as a condensed liquid. However, since the condensate has low purity, it can be introduced into the steam cleaning tank (20) to perform low-cleanness steam cleaning. It can be used for precise steam cleaning as a highly pure cleaning liquid (21). As a result of the boil-down operation, only the waste liquid in which the dirt component is concentrated remains in the boil-down container (34).

During the boil-down operation, the steam cleaning tank is also used.
In (20), since the steam cleaning operation is performed, the cleaning liquid
The dirt component flows into (21) one after another. Therefore, the boiling operation is performed again. In order to do this, the pressure reducing valve (35) is closed and the vacuum release valve (37) is opened to release the reduced pressure in the boiling container (34) once. Then, the open / close valve (40) is opened again, and the contaminated cleaning liquid (33) in the steam cleaning tank (20) is transferred to the boiling container (34). Alternatively, without releasing the reduced pressure in the boiling container (34), the on-off valve (40) is opened, and the contaminated cleaning liquid in the steam cleaning tank (20) is opened.
(33) may be sucked into the boiling container (34). Then, when the contaminated cleaning liquid (33) is introduced into the boiling container (34), the boiling operation is performed again. In this manner, the boiling operation can be repeatedly performed every time the cleaning liquid (21) in the steam cleaning tank (20) is contaminated.

If the amount of contaminants in the boiling container (34) reaches a limit while repeating the boiling operation, drainage is performed.
(41) is opened, and a waste liquid collecting section (42) for discharging waste liquid
Drain into. The waste liquid in the waste liquid recovery section (42) can be disposed of by incineration or the like. Then, by closing the drain (41), the boiled container is removed from the steam cleaning tank (20).
The contaminated cleaning liquid (33) is introduced into (34), and the boiling operation can be performed again.

As described above, by continuously performing the boiling operation in the boiling container (34), the degree of contamination of the cleaning liquid (21) in the steam cleaning tank (20) is kept low, and high-purity cleaning steam is constantly supplied. Can occur. In addition, since this boiling operation is not performed in the steam cleaning tank (20) but in the separately provided boiling container (34), there is no need to interrupt the steam generation operation in the steam cleaning tank (20). In addition, the steam cleaning can be performed efficiently.

Further, the boiling point is lowered under reduced pressure to reduce
The boil-down operation of (33) prevents thermal decomposition of chlorine-based organic solvents, etc., and prevents the generation of harmful gas, etc., and promotes vaporization, and efficiently uses the cleaning liquid (21) component in the condenser (38). Can be collected in a timely manner. As a result, the recycling rate of the cleaning liquid (21) is increased, and resource saving can be achieved. Also, since the content of chlorine compounds in the waste liquid is reduced, even if the waste liquid is incinerated, dioxin is hardly generated,
It is also possible to protect the environment.

Further, in the first embodiment, the boiling-down apparatus is installed in the steam cleaning tank (20) which performs the treatment under the atmospheric pressure. It is installed in a distillation regeneration tank (43) for performing the distillation regeneration in. Furthermore,
In the first embodiment, a boiled container (34) formed separately from the steam cleaning tank (20) is housed and arranged inside the steam cleaning tank (20). In the second embodiment, however, FIG. As shown in the figure, a boiled container (34) is formed by partitioning a central portion of the distillation regeneration tank (43) with a cylindrical dividing wall (44). Also, the third
In the embodiment, as shown in FIG. 3, the inside of the distillation regeneration tank (43) is divided into two by a plane dividing wall (44), so that one space is a boiled vessel (34). In addition, these reduced-pressure distillation and regeneration devices are provided in the existing distillation and regeneration tank (43) in a boiling container.
(34) may be provided, or the distillation regeneration tank (43) provided with the boiling container (34) may be newly manufactured for the present invention.

In both the second and third embodiments, the boiling container (34) and the distillation regeneration tank (43) are connected to the open / close valve (40).
Can be connected to each other, and as a pressure reducing mechanism,
The ejector device (45) is connected to 4). A condenser (38) is arranged between the ejector device (45) and the boiling container (34) via a pressure reducing valve (35). Then, the pressure in the boiling container (34) is reduced by the suction force of the pump (46) of the ejector device (45), and
The transfer of steam to (38) is enabled.

The processing in the vacuum distillation regenerating apparatus of the second and third embodiments as described above will be described. In the distillation regeneration tank (43),
A cleaning liquid (21) containing a dirt component is supplied from an appropriate supply unit by a liquid level adjusting mechanism. In addition, this distillation regeneration tank
The condensate condensed in the condenser (38) of the first embodiment can be supplied to (43), and the condensate having low purity can be distilled and regenerated to be reused for liquid washing or steam washing. it can.

Then, in the distillation regeneration tank (43), the electromagnetic valve A (47) and the electromagnetic valve B (48) are opened, and the inside of the distillation regeneration tank (43) is opened by an appropriate pressure reducing mechanism (not shown). Reduce pressure. Further, the cleaning liquid (21) in the distillation regeneration tank (43) is heated by the heating element (23) to generate regeneration steam. This regenerated steam is transferred to the steam cleaning tank (20) of the first embodiment via the electromagnetic valve A (47) and the electromagnetic valve B (48), and is used for steam cleaning as high-purity cleaning steam. Can do things.

In the present apparatus, the regenerated steam can be cooled and recovered as a condensate. That is, the electromagnetic valve C (50)
, The distillation regeneration tank (43) and the ejector device (45) are formed so as to be able to communicate with each other. Then, the electromagnetic valve B (48) is closed, and the electromagnetic valve A (47) and the electromagnetic valve C (50) are opened, so that the inside of the distillation regeneration tank (43) is suctioned by the ejector device (45). Is reduced, and the cleaning liquid (21) is vaporized. Then, the regenerated steam is transferred to the condenser (38) and condensed, and the condensed liquid is stored in the storage tank (5) of the ejector device (45).
Collected in 1).

Then, a distillation regeneration treatment as described above is performed,
When the degree of contamination of the cleaning liquid (21) in the distillation regeneration tank (43) increases, the open / close valve (40) is opened while the distillation regeneration is being performed. Then, the contaminated cleaning liquid (33) is introduced into the boiling container (34), and the boiling operation is performed as in the first embodiment. The steam generated by this boil-down operation is
It is transferred to the condenser (38) by the suction force of the ejector device (45), condensed, and stored in the storage tank (51) of the ejector device (45).
Is stored in The condensate in the storage tank (51) may be re-introduced into the distillation regeneration tank (43) to perform distillation regeneration.

During the boil-down operation, the open / close valve (40)
May be closed, and after completion, the valve may be opened again to re-introduce the contaminated cleaning liquid (33) into the boiling container (34) and restart the boiling operation. Alternatively, the opening and closing valve (40) is always opened, and the contaminated washing liquid (33) is constantly supplied to the boiling container (34) by the reduced pressure with the reduced amount due to the progress of the boiling operation, so that the boiling operation is continuously performed. May be performed. By repeating the boiling operation in the boiling container (34), the washing liquid in the distillation regeneration tank (43) is removed.
The contamination of (21) can be suppressed, and high-purity regenerated steam can always be obtained.

Further, in another different fourth embodiment, as shown in FIG. 4, a boiled down container (34) having a U-shaped cross section is accommodated in a distillation regeneration tank (43) which can be depressurized. The open lower end of the boiling container (34) is closely attached to the lower bottom wall of the distillation regeneration tank (43), and the lower bottom wall is shared so that the inside of the boiling container (34) can be hermetically sealed. The distillation regeneration tank (43) may be an existing one, or may be a newly manufactured one provided with a boiler. The distillation regeneration tank (43) is provided with a vacuum pump (36) of a pressure reducing mechanism.
Thus, the inside of the cleaning liquid (21) can be reduced in pressure, and the cleaning liquid (21) can be regenerated under reduced pressure. And a distillation regeneration tank (43)
The regenerated steam generated therein is transferred to the condenser (38) by the suction force of the vacuum pump (36), and is collected as a condensate by cooling.

Then, the boiled container (34) of the fourth embodiment.
By connecting to the pressure reducing mechanism of the distillation regeneration tank (43), the pressure in the boiling container (34) can be reduced. When performing the boil-down operation in the boil-down container (34), the opening and closing valve (40) is opened while the distillation and regeneration are being performed in the distillation and regeneration tank (43), and contamination of the distillation and regeneration tank (43) is performed. Cleaning solution (3
3) is introduced into the boiling container (34). Then, by opening the pressure reducing valve (35), the pressure in the boiling container (34) is reduced, and the boiling operation of the contaminated cleaning liquid (33) at a low boiling point is performed. The steam generated by this boiling operation is also transferred to the condenser (38) by the suction force of the vacuum pump (36) and condensed and liquefied.

As described above, in the fourth embodiment, the distillation regeneration tank
The vacuum pump (36) and the condenser (3) which are the pressure reducing mechanism of (43)
Since 8) can also be used as a pressure reducing mechanism and a steam recovery means of the boiling container (34), a distillation regeneration device having a boiling device can be manufactured at low cost.

In the first to fourth embodiments, the boiled container (34) is provided with the distillation regeneration tank (43) or the steam cleaning tank (2).
0) or are formed by dividing these insides. In another different fifth embodiment, as shown in FIG. 5, the boiled vessel (34) is placed in the distillation regeneration tank (43). It is located outside. The boiled container (34) is provided with a heating mechanism such as a steam coil separately from the distillation regeneration tank (43).
(52) is provided inside. Further, the distillation regeneration tank (43) and the boiling container (34) can be communicated with each other via an extra-fine pipe (53) provided with an opening / closing valve (40). Further, the distillation regeneration tank (43) can be communicated with the boiling container (34) via the pressure reducing valve (35).

Then, the distillation regeneration tank (4) of the fifth embodiment
In 3), the regenerated steam can be supplied to the steam cleaning tank (20), and the regenerated steam can be cooled and recovered. To supply the regenerated steam, the electromagnetic valve A (47) and the electromagnetic valve B (48) are opened, and the pressure in the distillation regeneration tank (43) is reduced by an appropriate pressure reducing mechanism (not shown). By heating the cleaning liquid (21) under this reduced pressure, regeneration steam is generated. The regenerated steam is supplied to the electromagnetic valve A
(47) and the steam cleaning tank (2) via the electromagnetic valve B (48).
0) and can be used for steam cleaning.

To cool and recover the regenerated steam, the electromagnetic valve B (48) is closed, the electromagnetic valve A (47) and the electromagnetic valve C (50) are opened, and the electromagnetic valve C (50) is opened. The pressure inside the distillation regeneration tank (43) is reduced by the vacuum pump (36) provided on the side. Then, the regenerated steam generated in the tank is transferred to the condenser (38) by the suction force of the vacuum pump (36).
In the condenser (38), the regenerated steam is cooled and collected as a condensate.

On the other hand, on the boiling container (34) side, during the distillation and regeneration of the washing liquid (21), the vacuum release valve (37) is closed, and the pressure reducing valve (35) and the open / close valve (40) are opened. As a result, an appropriate pressure reducing mechanism on the side of the steam cleaning tank (20) or the suction force of the vacuum pump (36) acts, and the boiled container (34)
The pressure inside is also reduced. Due to this reduced pressure, the contaminated cleaning liquid (33) in the distillation regeneration tank (43) gradually flows into the boiled-down vessel (34) via the extra-fine pipe (53).

The boiled container (3) of the fifth embodiment
To perform the boiling operation in 4), the on-off valve (40) is closed to stop the inflow of the contaminated cleaning liquid (33). Next, by heating with the heating mechanism (52) of the boiling container (34),
Vaporization of the contaminated cleaning liquid (33) is performed under reduced pressure. This vapor flows into the distillation regeneration tank (43) via the pressure reducing valve (35). Then, when the boiling operation is completed, the opening and closing valve (40) is opened, and the contaminated cleaning liquid (33) is newly introduced into the boiling container (34), whereby the boiling operation can be repeatedly performed.

Alternatively, the open / close valve (40) is always opened,
The contaminated washing liquid (3) is stored in the boiled container (34) via the extra-fine pipe (53) by the amount reduced by the progress of the boil-down operation.
3) may be always supplied. In this way, the boiling operation in the boiling container (34) can be performed continuously without interruption. In addition, since the extra-fine pipe (53) is used, the contaminated cleaning liquid (33) rarely flows back to the distillation regeneration tank (43), and if the extra-fine pipe (53) is provided with a check valve. In addition, the backflow of the contaminated cleaning liquid (33) can be reliably prevented.

When the amount of the dirt component in the boiled container (34) reaches the limit, the waste liquid is removed. To do that,
The pressure reducing valve (35) and the opening / closing valve (40) are closed, and the vacuum release valve (37) is opened.
Release the pressure reduction in 4). Next, the drain (41) is opened, and the waste liquid in the boiled container (34) is discharged to the waste liquid collecting section (42). Thus, also in the fifth embodiment, the distillation regeneration tank (4)
The decompression mechanism of 3) can be used also as the boiling container (34).

In the fourth and fifth embodiments, the pressure reduction mechanism is also used for the boiling container (34) and the distillation regeneration tank (43), but in another different sixth embodiment, FIG. As shown in the figure, separately from the boiling container (34), a distillation regeneration tank (43)
Is connected to a vacuum pump (36), a decompression valve (35), a vacuum release valve (37), and a condenser (38) to enable regeneration under reduced pressure distillation.

In the first to sixth embodiments, the condenser (38) for recovering steam is connected to the boiling container (34). However, it is not always necessary to connect the condenser (38). .
That is, a cleaning liquid for performing a boiling operation in a boiling container (34).
If (21) does not generate water, alcohols, or other harmful vapors, continuously generated vapors can be released from the boiling container (34) into the atmosphere.

[0063]

As described above, the present invention is constructed as described above, so that it is possible to prevent a rise in the degree of contamination of the cleaning liquid in the steam generating tank and to always generate high-purity steam. Also,
Since the boiling operation for removing the dirt component of the cleaning liquid is not performed in the steam generating tank but separately in the boiling container, it is not necessary to stop the steam generating operation in the distillation regeneration tank. In addition, every time the cleaning liquid in the steam generation tank becomes dirty, the boil-down operation can be repeated without interrupting the operation of the steam generation tank. Therefore, the steam cleaning process and the distillation regeneration process can be efficiently performed with high-purity steam.

In addition, since the boiling point is reduced under reduced pressure and the contaminated cleaning liquid is boiled down, vaporization can be performed in a short time, and the working efficiency is improved. When the contaminated cleaning liquid is a chlorine-based organic solvent or the like, thermal decomposition can be prevented, generation of harmful components in the vapor can be suppressed, and the concentration of chlorine compounds in the waste liquid can be reduced. Further, the generation of dioxin during the boil-down operation or the waste liquid incineration treatment can be suppressed, and environmental pollution can be prevented. Further, such a boiling apparatus can be formed with a simple structure and inexpensive parts. In addition, since a boiling device can be installed in an existing steam cleaning tank, low-cost introduction becomes possible. In addition, by recovering the steam generated by the boiling operation with a condenser, the cleaning liquid can be effectively recycled, and resource saving can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment in which a boiling-down apparatus of the present invention is installed in a steam cleaning tank.

FIG. 2 is a sectional view showing a second embodiment in which the boiling device is installed in a distillation regeneration tank.

FIG. 3 is a sectional view showing a third embodiment.

FIG. 4 is a sectional view showing a fourth embodiment.

FIG. 5 is a sectional view showing a fifth embodiment.

FIG. 6 is a sectional view showing a sixth embodiment.

FIG. 7 is a sectional view showing a conventional steam cleaning tank.

[Explanation of symbols]

 Reference Signs List 20 steam cleaning tank 21 cleaning liquid 24 object to be cleaned 33 contaminated cleaning liquid 34 boiling container 38 condenser 40 opening / closing valve 41 drain 43 distillation / regeneration tank 44 partition wall 52 heating mechanism

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[Procedure amendment]

[Submission date] March 23, 2001 (2001.3.2)
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Boiler for contaminated cleaning liquid

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam cleaning apparatus for an object to be cleaned such as an electronic part, a mechanical part, and a medical device, a distillation and regeneration apparatus for a contaminated cleaning liquid, and other steam generators. The present invention relates to an apparatus for boiling down a contaminated cleaning liquid, capable of removing dirt components and continuously generating high-purity steam.

[0002]

2. Description of the Related Art Conventionally, fluorine-based, chlorine-based, hydrocarbon-based,
There has been an apparatus for vaporizing a cleaning liquid such as a silicone-based solvent or alcohol, and performing vapor cleaning of an object to be cleaned and distillation and regeneration of a contaminated cleaning liquid. In these apparatuses, when the dirt component of the cleaning liquid is accumulated to the limit by repeating each process, the cleaning liquid is boiled down to remove the dirt component. A series of steps of this conventional boil down work,
A description will be given of a steam cleaning apparatus that performs steam cleaning under atmospheric pressure.

As shown in FIG. 5, this steam cleaning apparatus comprises a steam cleaning tank (2) which can be closed with a lid (1), and a liquid level control (not shown) provided from an externally provided supply unit (not shown). 3) cleaning solution
(4) can always be introduced. And steam cleaning tank
The cleaning solution (4) in (2) is heated with a heating element (5) and a temperature sensor (6).
Cleaning steam is generated by heating with a heating mechanism consisting of In addition, this cleaning steam is supplied to a steam cleaning tank (2).
After being condensed by a cooling mechanism (8) provided on the upper part of the tank, it is collected in a condensed liquid storage tank (10) provided outside.

[0004] The cleaning steam is condensed by coming into contact with the object to be cleaned (7) stored in the steam cleaning tank (2), thereby performing steam cleaning and processing adhered to the object to be cleaned (7). Oil and dirt particles are washed away. When the condensed liquid containing these dirt components falls, the cleaning liquid (4) filled in the steam cleaning tank (2) is contaminated. When the cleaning steam of the object to be cleaned (7) is repeated, the degree of contamination of the cleaning liquid (4) in the steam cleaning tank (2) gradually increases. It becomes difficult to do.

[0005] Therefore, when the contamination exceeds the limit, the cleaning operation of the object to be cleaned (7) is stopped, and the contaminated cleaning liquid (4) is continuously heated in the steam cleaning tank (2). I was working. The steam washing tank
In (2), a concentrate of the soil component remains. This concentrate was discharged from the steam washing tank (2) to the outside via the drain (11). Thereafter, a cleaning liquid (4) free from contamination is introduced into the steam cleaning tank (2) from the supply unit, and then heated by heating means to generate high-purity cleaning steam, thereby cleaning the object (7) to be cleaned. The steam cleaning process was restarted. Also, during the boil-down operation, steam is generated from the contaminated cleaning liquid (4).

[0006]

However, since the steam generated during the boil-down operation is low in purity and not suitable for precise steam cleaning, it has to be released into the atmosphere or collected by a condenser or the like. Cleaning work was interrupted. Also, after the boil-down operation, the waste liquid discharge operation and the steam cleaning tank (2)
A time for refilling the inside with the cleaning liquid (4) was required. Further, after filling with the cleaning liquid (4), cleaning steam could not be generated immediately, and it was necessary to heat for a certain period of time. During that time, the steam cleaning process could not be performed. In this way, the steam cleaning work was interrupted for the boil down operation,
It was inefficient because a lot of time was lost before resuming work.

[0007] A contaminated cleaning solution (4) under atmospheric pressure
When boil-down operation is carried out by heating to a high temperature, if the boil-down temperature is too high, there is a problem that when the boil-down temperature is too high, a thermal decomposition reaction occurs, toxic gas is generated, and environmental pollution is caused. Further, chlorine compounds are easily generated in the waste liquid after boiling. In such waste liquids containing a large amount of chlorine compounds, a large amount of dioxin is generated at the time of incineration treatment, which also causes a problem of environmental pollution. Therefore, the boiling temperature cannot be set too high,
The boil-down operation took time, and as a result, the restart of the steam cleaning operation was delayed, which was inefficient.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to perform a boil-down operation of a contaminated cleaning solution without interrupting a steam generation operation in a steam generation tank, and to efficiently remove a dirt component from the steam generation tank. It is assumed that. And it is possible to continuously supply high-purity cleaning steam in the steam generation tank,
It is intended to improve work efficiency. In addition, the cleaning liquid is efficiently recycled, resources can be saved, and at the same time, the generation of harmful substances due to the boiling operation is suppressed to prevent environmental pollution.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a heating mechanism is arranged in a steam generating tank provided with a liquid level control mechanism, which is in communication with a cleaning liquid supply section. In the tank , a boil-down container that can depressurize the inside with a decompression mechanism is arranged, and
The contaminated washing liquid inside the vessel can be heated, and the boiled container and the steam generating tank can be communicated via an open / close valve, and a drain for discharging waste liquid is formed in the boiled container.

[0010] The boiling container may be connected to a condenser capable of recovering steam generated during the boiling operation.

[0011] The steam generation tank may be a steam cleaning tank for performing steam cleaning of an object to be cleaned in a steam generation section.

Further, the steam generation tank may be a distillation regeneration tank for regenerating the cleaning liquid by distillation in the steam generation section.

[0013]

The present invention is constructed as described above, and the cleaning liquid in the steam generating tank is heated by a heating mechanism to be vaporized. If the steam generation tank is, for example, a steam cleaning tank, the steam comes into contact with an object to be cleaned arranged in the tank and is condensed and liquefied. The condensed liquid is used to wash off dirt components such as processing oil and dirt particles attached to the object to be cleaned, thereby performing a steam cleaning process. And this dirt component falls into the cleaning liquid in a steam cleaning tank. On the other hand, with the decrease of the cleaning liquid in the steam generation tank, a cleaning liquid having no or little contamination is introduced from the supply unit into the steam generation tank by the liquid level control mechanism. Then, by repeating the steam cleaning process, the dirt component gradually flows into the steam generation tank.

If the steam generating tank is a cleaning liquid distillation / regenerating tank, a contaminated cleaning liquid which is condensed and liquefied on the surface of the object to be cleaned and cleaned the object to be cleaned is introduced into the distillation / regenerating tank. The contaminated cleaning liquid is vaporized in the steam generation tank, then condensed in a condenser or the like, and regenerated as a high-purity cleaning liquid. Further, the dirt component remains in the steam generation tank. Also in this case, the contaminated cleaning liquid is continuously introduced into the distillation regeneration tank from the supply unit.

As described above, if the cleaning liquid in the steam generation tank is contaminated with a dirt component, the purity of the cleaning steam generated in the tank is reduced. It is necessary to purify the cleaning liquid in the steam generation tank by using the boiling apparatus. To do so, first, an opening / closing valve between the steam generation tank and the boiling container is opened while the steam generation processing is being performed in the steam generation tank. By this valve opening, the contaminated cleaning liquid containing the dirt component in the steam generation tank,
Spills into boiling containers. Then, when a certain amount of the contaminated cleaning liquid is introduced into the boiling container, the open / close valve is closed and the pressure reducing mechanism is driven to reduce the pressure in the boiling container.

In this reduced pressure state, the contaminated cleaning liquid in the boiling container is heated. This heating may be performed by a heating mechanism provided in the boiling container, or a heating mechanism of a steam generating tank may be used. The heating and the reduced pressure act to contaminate the cleaning liquid in the boiled vessel efficiently. By discharging this steam from the boiling container to the outside, the boiling operation under reduced pressure is performed smoothly.

As described above, by transferring the contaminated cleaning liquid to the boiling container, a part of the contaminated components in the steam generating tank is removed. In addition, with the transfer of the contaminated cleaning liquid to the boiling container side and the reduction of the cleaning liquid due to the generation of steam, a new cleaning liquid is introduced from the cleaning liquid supply unit by the liquid level control mechanism in the steam generation tank, and the cleaning liquid in the steam generation tank Improve pollution degree. Therefore, it is possible to continuously generate high-purity steam in the steam generation tank.

This boiling operation can be performed repeatedly without interrupting these processes during the steam cleaning or distillation regeneration process. That is, when the amount of the dirt component in the cleaning liquid increases, the opening / closing valve is opened again to transfer the contaminated cleaning liquid in the steam generation tank to the boiling container, perform the boiling operation, and supply the supply unit into the steam generation tank. A new cleaning solution is introduced from.

[0019] By repeating the boiling operation, waste liquid in which dirt components are concentrated remains in the boiling container.
If the amount of waste liquid increases, stop the boil-down operation,
Release the vacuum in the boiling container. Then, by opening the drain for discharging the waste liquid, the concentrate in the boiled container is discharged to the drain side, and later disposed of by a method such as incineration.

As described above, the washing operation is repeated, and the cleaning liquid is newly supplied from the supply unit, so that the degree of contamination of the cleaning liquid is suppressed to a low level in the steam generation tank, and the purity of the steam generated in the tank is good. Is kept. Using this high-purity steam, a steam cleaning process and a distillation regeneration process are precisely performed in the steam generation tank. In addition, since there is no need to interrupt the processing in the steam generation tank during the boil-down operation, it is possible to efficiently perform steam washing and distillation regeneration.

Further, in the present invention, the boiling point of the cleaning liquid can be lowered because the boil-down operation is performed under reduced pressure. Therefore, even if the difference between the boiling temperature and the boiling point is increased, the boiling can be performed at a temperature at which the chlorine-based organic solvent or the like does not cause thermal decomposition. As a result, vaporization of the contaminated cleaning liquid is promoted, so that efficient boil-down operation can be performed, and generation of harmful gas and harmful substances in waste liquid can be prevented. Also,
By the boiling operation at the low boiling point, the amount of the chlorine compound generated in the waste liquid is also reduced. Therefore, when waste liquid is incinerated, dioxin is hardly generated, and environmental pollution can be prevented.

The steam generation tank may be newly manufactured for use in the present invention with a product provided with a boiling device, but it is also possible to manufacture only the boiling device and install it in an existing steam generation tank. Therefore, low-cost introduction becomes possible. In this case, since the pressure reducing mechanism is connected to the boiling device itself, it can be installed in a steam generating tank having low pressure resistance used under atmospheric pressure. Of course, the boiling device can be installed in a steam generating tank which is used under reduced pressure and has excellent pressure resistance.

Further, the boiling container may be formed separately from the steam generating tank, and may be arranged and used in the steam generating tank. In such an apparatus, the cleaning liquid heated in the heating mechanism of the steam generation tank also heats the contaminated cleaning liquid in the boiling container, so that the cleaning operation of the contaminated cleaning liquid can be performed efficiently.

If the generated cleaning liquid is harmless, such as water or alcohol, and if the vapor is not reused, the vapor may be released to the atmosphere, but the vapor contains harmful substances. If there is a risk of being reused or if it is desired to reuse it as a cleaning solution, perform a recovery process without releasing it to the atmosphere. And the condenser for this vapor recovery may be connected to a boiling container. In this case, when steam is generated in the boiling container, the steam is sent to the condenser by the suction force of the pressure reducing mechanism. Then, the steam is cooled in the condenser and condensed and liquefied. This condensate has a higher purity than when it is boiled down under atmospheric pressure, but it may not be used for precise steam cleaning as it is. Can be reused as As described above, by efficiently collecting and reusing the cleaning liquid component by the condenser, it is possible to save resources of the cleaning liquid and the like.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is carried out in a steam cleaning tank for cleaning an object to be cleaned will be described below with reference to FIG. 1. (20) is a steam cleaning tank as a steam generating tank under atmospheric pressure. A conventionally known device that performs a steam cleaning process is used. This steam cleaning tank
(20) contains water, fluorine, chlorine, hydrocarbon,
Appropriate cleaning liquid such as silicone solvent or alcohol (2
1) is filled, and cleaning steam can be generated by a heating mechanism including a temperature sensor (22) and a heating element (23) such as a heating pipe. In addition, a cleaning unit (25) for storing the object to be cleaned (24) and performing a steam cleaning process is provided on the upper side of the steam cleaning tank (20), and a lid ( The object to be cleaned (24) can be taken in and out through an opening (27) that can be sealed at 26).

Also, a cooling unit provided above the washing unit (25)
In (28), the continuously generated cleaning steam is cooled and condensed,
It can be transferred to a condensate storage tank (30) provided outside. The condensate storage tank (30) is provided with a liquid level sensor.
A liquid level control mechanism including a supply valve (31) and a supply valve (32) enables communication with the steam cleaning tank (20). The condensed liquid storage tank is controlled by the liquid level control mechanism.
The condensate in (30) is introduced into the steam cleaning tank (20), and the internal cleaning liquid (21) is maintained at a constant amount.

The steam cleaning tank formed as described above
Inside of (20), a boiled container (34) of the contaminated cleaning liquid (33)
The storage is arranged. The boiled container (34) is a pressure-resistant, airtight container, and the lower side is a cleaning solution for the steam cleaning tank (20).
(21), and the upper part is cleaned (2).
5). Also, in the boiled container (34),
Pressure reducing valve (35), vacuum pump (36), vacuum release valve
The decompression mechanism consisting of (37) is connected to enable decompression inside and release of decompression.

Further, the pressure reducing valve (35) and the vacuum pump (3)
A condenser (38) through which cooling water flows is connected between the apparatus and (6), so that steam generated by the boiling operation can be condensed. The boiled container (34) can communicate with the steam cleaning tank (20) via an open / close valve (40), and is connected to a waste liquid collecting section (42) via a drain (41) for discharging waste liquid. ing.

In the cleaning apparatus constructed as described above, the cleaning liquid (21) is heated by the heating element (23) and the cleaning unit (25) is cleaned in the cleaning section (25). Supply steam. The opening (27) is provided in the cleaning section (25).
By arranging the object to be cleaned (24) through the, steam cleaning of the object to be cleaned (24) by the cleaning steam is performed. That is, the cleaning vapor is condensed and liquefied on the surface of the object (24) to wash off the processing oil and dirt particles attached to the object (24). The condensate containing the dirt component flows into the cleaning liquid (21) of the steam cleaning tank (20).

Further, with the generation of cleaning steam, a steam cleaning tank
The washing liquid (21) in (20) decreases. Therefore, the liquid level sensor (31) of the liquid level control mechanism and the supply valve (32) are operated, and the cleaning liquid (21) is newly introduced from the condensed liquid storage tank (30) into the steam cleaning tank (20). It is possible to continuously generate cleaning steam.

By repeating the steam cleaning operation as described above, the concentration of the dirt component of the cleaning liquid (21) in the steam cleaning tank (20) increases. If this concentration is high, the purity of the cleaning steam becomes low, and there is a possibility that precise steam cleaning cannot be performed. Therefore, in order to maintain the purity of the cleaning steam, it is necessary to reduce the contamination components in the steam cleaning tank (20).

[0032] The steam cleaning tank (20) and the boil-down container can be used while the cleaning steam is being generated in the steam cleaning tank (20).
The on / off valve (40) between the cleaning liquid (34) and the contaminated cleaning liquid (33) in the steam cleaning tank (20) is transferred to the boiling container (34). By this transfer, in the steam cleaning tank (20), the amount of dirt components in the inside decreases, and the liquid level control mechanism operates to introduce a new cleaning liquid (21) from the supply unit.
Accordingly, the degree of contamination in the steam cleaning tank (20) is reduced, and the purity of the cleaning steam generated in the tank can be kept good. And it becomes possible to continue the precise steam cleaning process of the to-be-cleaned object (24) with this high-purity cleaning steam.

On the other hand, on the boiled container (34) side, when a certain amount of the contaminated cleaning liquid (33) is introduced, the open / close valve (40) is closed. Then, by opening the pressure reducing valve (35) and driving the vacuum pump (36), the boiling container (3) is opened.
4) Reduce the pressure inside. By this reduced pressure, a boiled container (34)
The contaminated cleaning liquid (33) is vaporized. The lower part of the boiled container (34) is a cleaning solution for the steam cleaning tank (20).
Since the cleaning liquid (21) heated by the heating element (23) is also immersed in the (21), the contaminated cleaning liquid (33) in the boiling container (34) is also heated, and vaporization is promoted. Becomes

The steam thus generated is introduced into the condenser (38) by the suction force of the vacuum pump (36).
Then, it is cooled by the cooling water of the condenser (38) and collected as a condensed liquid. However, since the condensate has low purity, it can be introduced into the steam cleaning tank (20) to perform low-cleanness steam cleaning. It can be used for precise steam cleaning as a highly pure cleaning liquid (21). As a result of the boil-down operation, only the waste liquid in which the dirt component is concentrated remains in the boil-down container (34).

During the boil-down operation, the steam cleaning tank is also used.
In (20), since the steam cleaning operation is performed, the cleaning liquid
The dirt component flows into (21) one after another. Therefore, the boiling operation is performed again. In order to do this, the pressure reducing valve (35) is closed and the vacuum release valve (37) is opened to release the reduced pressure in the boiling container (34) once. Then, the open / close valve (40) is opened again, and the contaminated cleaning liquid (33) in the steam cleaning tank (20) is transferred to the boiling container (34). Alternatively, without releasing the reduced pressure in the boiling container (34), the on-off valve (40) is opened, and the contaminated cleaning liquid in the steam cleaning tank (20) is opened.
(33) may be sucked into the boiling container (34). Then, when the contaminated cleaning liquid (33) is introduced into the boiling container (34), the boiling operation is performed again. In this manner, the boiling operation can be repeatedly performed every time the cleaning liquid (21) in the steam cleaning tank (20) is contaminated.

If the amount of contaminants in the boiling container (34) reaches a limit while repeating the boiling operation, drainage is performed.
(41) is opened, and a waste liquid collecting section (42) for discharging waste liquid
Drain into. The waste liquid in the waste liquid recovery section (42) can be disposed of by incineration or the like. Then, by closing the drain (41), the boiled container is removed from the steam cleaning tank (20).
The contaminated cleaning liquid (33) is introduced into (34), and the boiling operation can be performed again.

As described above, the degree of contamination of the cleaning solution (21) in the steam cleaning tank (20) is kept low by continuously performing the boiling operation in the boiling container (34), so that high-purity cleaning steam is constantly supplied. Can occur. In addition, since this boiling operation is not performed in the steam cleaning tank (20) but in the separately provided boiling container (34), there is no need to interrupt the steam generation operation in the steam cleaning tank (20). In addition, the steam cleaning can be performed efficiently.

Also, the boiling point is reduced under reduced pressure to reduce
The boil-down operation of (33) prevents thermal decomposition of chlorine-based organic solvents, etc., and prevents the generation of harmful gases, and promotes vaporization. Can be collected in a timely manner. As a result, the recycling rate of the cleaning liquid (21) is increased, and resource saving can be achieved. Also, since the content of chlorine compounds in the waste liquid is reduced, even if the waste liquid is incinerated, dioxin is hardly generated,
It is also possible to protect the environment.

In the first embodiment, the boiling-down apparatus is installed in the steam cleaning tank (20) for performing the treatment under the atmospheric pressure. It is installed in a distillation regeneration tank (43) for performing the distillation regeneration in. Furthermore,
In the first embodiment, a boiled container (34) formed separately from the steam cleaning tank (20) is housed and arranged inside the steam cleaning tank (20). In the second embodiment, however, FIG. As shown in the figure, a boiled container (34) is formed by partitioning a central portion of the distillation regeneration tank (43) with a cylindrical dividing wall (44) . In addition , these vacuum distillation regeneration apparatuses may be provided with a boiling container (34) in the existing distillation regeneration tank (43) or a distillation regeneration tank (43) provided with the boiling container (34) for the present invention. May be newly manufactured.

In the second embodiment, the boiled container (3
4) and the distillation regeneration tank (43) can be communicated by an opening / closing valve (40), and an ejector device (45) is connected to the boiling container (34) as a pressure reducing mechanism. A pressure reducing valve (35) is provided between the ejector device (45) and the boiling container (34).
The condenser (38) is arranged via the. Then, the suction force of the pump (46) of the ejector device (45) reduces the pressure in the boiling container (34) and enables the transfer of steam to the condenser (38).

[0041] To explain the process of vacuum distillation reproducing apparatus of the second real施例such as described above. In the distillation regeneration tank (43), a cleaning liquid (21) containing a dirt component is supplied from an appropriate supply unit by a liquid level adjusting mechanism. In addition, this distillation regeneration tank (43)
The condensed liquid condensed by the condenser (38) of the first embodiment can be supplied to the first embodiment, and the condensed liquid having a low purity can be regenerated by distillation and reused for liquid washing or steam washing.

In the distillation regeneration tank (43), the electromagnetic valve A (47) and the electromagnetic valve B (48) are opened, and the interior of the distillation regeneration tank (43) is opened by an appropriate pressure reducing mechanism (not shown). Reduce pressure. Further, the cleaning liquid (21) in the distillation regeneration tank (43) is heated by the heating element (23) to generate regeneration steam. This regenerated steam is transferred to the steam cleaning tank (20) of the first embodiment via the electromagnetic valve A (47) and the electromagnetic valve B (48), and is used for steam cleaning as high-purity cleaning steam. Can do things.

In the present apparatus, the regenerated steam can be cooled and recovered as a condensate. That is, the electromagnetic valve C (50)
, The distillation regeneration tank (43) and the ejector device (45) are formed so as to be able to communicate with each other. Then, the electromagnetic valve B (48) is closed, and the electromagnetic valve A (47) and the electromagnetic valve C (50) are opened, so that the inside of the distillation regeneration tank (43) is suctioned by the ejector device (45). Is reduced, and the cleaning liquid (21) is vaporized. Then, the regenerated steam is transferred to the condenser (38) and condensed, and the condensed liquid is stored in the storage tank (5) of the ejector device (45).
Collected in 1).

Then, the distillation regeneration treatment as described above is performed,
When the degree of contamination of the cleaning liquid (21) in the distillation regeneration tank (43) increases, the open / close valve (40) is opened while the distillation regeneration is being performed. Then, the contaminated cleaning liquid (33) is introduced into the boiling container (34), and the boiling operation is performed as in the first embodiment. The steam generated by this boil-down operation is
It is transferred to the condenser (38) by the suction force of the ejector device (45), condensed, and stored in the storage tank (51) of the ejector device (45).
Is stored in The condensate in the storage tank (51) may be re-introduced into the distillation regeneration tank (43) to perform distillation regeneration.

During the boil-down operation, the open / close valve (40)
May be closed, and after completion, the valve may be opened again to re-introduce the contaminated cleaning liquid (33) into the boiling container (34) and restart the boiling operation. Alternatively, the opening and closing valve (40) is always opened, and the contaminated washing liquid (33) is constantly supplied to the boiling container (34) by the reduced pressure with the reduced amount due to the progress of the boiling operation, so that the boiling operation is continuously performed. May be performed. By repeating the boiling operation in the boiling container (34), the washing liquid in the distillation regeneration tank (43) is removed.
The contamination of (21) can be suppressed, and high-purity regenerated steam can always be obtained.

Further, in another different third embodiment, as shown in FIG. 4, a boiled down container (34) having a U-shaped cross section is housed in a distillation regeneration tank (43) which can be decompressed. The open lower end of the boiling container (34) is closely attached to the lower bottom wall of the distillation regeneration tank (43), and the lower bottom wall is shared so that the inside of the boiling container (34) can be hermetically sealed. The distillation regeneration tank (43) may be an existing one, or may be a newly manufactured one provided with a boiler. The distillation regeneration tank (43) is provided with a vacuum pump (36) of a pressure reducing mechanism.
Thus, the inside of the cleaning liquid (21) can be reduced in pressure, and the cleaning liquid (21) can be regenerated under reduced pressure. And a distillation regeneration tank (43)
The regenerated steam generated therein is transferred to the condenser (38) by the suction force of the vacuum pump (36), and is collected as a condensate by cooling.

[0047] and, boiled down container of the third real施例(34)
By connecting to the pressure reducing mechanism of the distillation regeneration tank (43), the pressure in the boiling container (34) can be reduced. When performing the boil-down operation in the boil-down container (34), the opening and closing valve (40) is opened while the distillation and regeneration are being performed in the distillation and regeneration tank (43), and contamination of the distillation and regeneration tank (43) is performed. Cleaning solution (3
3) is introduced into the boiling container (34). Then, by opening the pressure reducing valve (35), the pressure in the boiling container (34) is reduced, and the boiling operation of the contaminated cleaning liquid (33) at a low boiling point is performed. The steam generated by this boiling operation is also transferred to the condenser (38) by the suction force of the vacuum pump (36) and condensed and liquefied.

[0048] As mentioned above, in the third real施例, distillation regeneration tank
The vacuum pump (36) and the condenser (3) which are the pressure reducing mechanism of (43)
Since 8) can also be used as a pressure reducing mechanism and a steam recovery means of the boiling container (34), a distillation regeneration device having a boiling device can be manufactured at low cost.

[0049] Further, in another different fourth real施例, as shown <br/> 4, boiled down separately from the container (34), distillation regeneration tank
A vacuum pump (36), a pressure reducing valve (35), a vacuum release valve (37), and a condenser (38) are connected to (43) to enable regeneration under reduced pressure.

In the first to fourth embodiments, the condenser (38) for recovering steam is connected to the boiling container (34), but it is not always necessary to connect the condenser (38). .
That is, a cleaning liquid for performing a boiling operation in a boiling container (34).
If (21) does not generate water, alcohols, or other harmful vapors, continuously generated vapors can be released from the boiling container (34) into the atmosphere.

[0051]

As described above, the present invention is constructed as described above, so that it is possible to prevent a rise in the degree of contamination of the cleaning liquid in the steam generating tank and to always generate high-purity steam. Also,
Since the boiling operation for removing the dirt component of the cleaning liquid is not performed in the steam generating tank but separately in the boiling container, it is not necessary to stop the steam generating operation in the distillation regeneration tank. In addition, every time the cleaning liquid in the steam generation tank becomes dirty, the boil-down operation can be repeated without interrupting the operation of the steam generation tank. Therefore, the steam cleaning process and the distillation regeneration process can be efficiently performed with high-purity steam.

In addition, since the boiling point is reduced under reduced pressure and the contaminated cleaning solution is boiled down, vaporization can be performed in a short time, and the working efficiency is improved. When the contaminated cleaning liquid is a chlorine-based organic solvent or the like, thermal decomposition can be prevented, generation of harmful components in the vapor can be suppressed, and the concentration of chlorine compounds in the waste liquid can be reduced. Further, the generation of dioxin during the boil-down operation or the waste liquid incineration treatment can be suppressed, and environmental pollution can be prevented. Further, such a boiling apparatus can be formed with a simple structure and inexpensive parts. In addition, since a boiling device can be installed in an existing steam cleaning tank, low-cost introduction becomes possible. In addition, by recovering the steam generated by the boiling operation with a condenser, the cleaning liquid can be effectively recycled, and resource saving can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment in which a boiling-down apparatus of the present invention is installed in a steam cleaning tank.

FIG. 2 is a sectional view showing a second embodiment in which the boiling device is installed in a distillation regeneration tank.

FIG. 3 is a sectional view showing a third embodiment.

FIG. 4 is a sectional view showing a fourth embodiment.

FIG. 5 is a sectional view showing a conventional steam cleaning tank.

[Description of Signs] 20 Steam cleaning tank 21 Cleaning liquid 24 Object to be cleaned 33 Contaminated cleaning liquid 34 Boiler vessel 38 Condenser 40 Open / close valve 41 Drain 43 Distillation regeneration tank 44 Dividing wall 52 Heating mechanism

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

Claims (7)

[Claims] 1. A heating mechanism is disposed in a steam generation tank provided with a liquid level control mechanism, which is in communication with a cleaning liquid supply unit, and a boiler vessel capable of depressurizing the inside by a decompression mechanism is connected to the steam generation tank. A contaminated washing liquid boiler, characterized in that the boiled container and the steam generating tank can be communicated through an opening / closing valve, and a drain for discharging waste liquid is formed in the boiled container. 2. The boiling container is placed in a steam generating tank,
The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the contaminated cleaning liquid is heated by a heating mechanism in the steam generation tank. 3. The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the boiling down vessel is formed by dividing the inside of a steam generating tank by a dividing wall. 4. The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the boiling down vessel is not provided in the steam generating vessel, but is provided with a heating mechanism separately from the steam generating vessel. 5. The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the boiling vessel is connected to a condenser capable of recovering steam generated during the boiling operation. 6. The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the steam generation tank is a steam cleaning tank for performing steam cleaning of an object to be cleaned in a steam generation section. 7. The apparatus for boiling down a contaminated cleaning liquid according to claim 1, wherein the steam generation tank is a distillation regeneration tank for regenerating a cleaning liquid by distillation in a steam generation section.