JPH07308501A - Detergent regenerating device and washing system - Google Patents

Abstract

PURPOSE:To continuously perform stable washing by efficiently separating a low b.p. soiling component and a high b.p. soiling component from a detergent, recovering a refined detergent (regenerated detergent), and also maintaining a cleaning power of the detergent constant. CONSTITUTION:A preheater 11, a flash tank 12, and a distiller 13 are combined, and a hydrocarbon based detergent containing soiling components is heated by the preheater 11 at a specified temp. 10 deg.C or more higher than the b.p. of water at operation vacuum of the flash tank 12 and also lower than the b.p. of the detergent, and it is delivered to the flash tank 12 to be evacuated and flashed, thus the low b.p. soiling component is evaporated and separated. Then the detergent having the low b.p. soiling component separated is transferred to the distiller 13 and is distilled, and the detergent is separated from the high b.p. soiling component to recover the detergent. Also in this washing device system, the detergent in a washing device A is conveyed to a detergent regenerating device B to be regenerated and also the regenerated detergent is returned to the washing device and the cleaning power of the detergent is kept constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent regenerating apparatus for regenerating a hydrocarbon type cleaning agent used for cleaning electronic parts, mechanical parts and the like, and a combination of the cleaning agent regenerating apparatus and the cleaning apparatus. The present invention relates to a cleaning device system.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
As an industrial cleaning agent for cleaning electronic parts and mechanical parts, a chlorofluorocarbon-based cleaning agent and a chlorine-based solvent such as trichloroethane have been used. However, these industrial cleaning agents have a problem that they cause destruction of the ozone layer, pollution of groundwater, and deterioration of working environment, and their use is being regulated.

Therefore, a method has been proposed in which a hydrocarbon-based cleaning agent is used as a cleaning agent other than a chlorofluorocarbon-based cleaning agent or a chlorine-based solvent such as trichloroethane.

By the way, the same applies to the case of cleaning with other cleaning agents, but when cleaning with a hydrocarbon-based cleaning agent, low-boiling point contaminants such as water in the cleaning agent,
Cleaning efficiency decreases as high boiling point contaminants such as processing oil accumulate.

Therefore, a method of distilling the cleaning agent has been proposed and implemented as a method of regenerating (purifying) the cleaning agent by separating these low boiling point contaminant components and high boiling point contaminant components.
It is not always easy to efficiently separate contaminants such as water and oil.

[0006] In particular, in the manufacturing process of the object to be cleaned, for example, when processing oil or the like which forms an emulsion with water is mixed in the cleaning agent, the water, which is a low boiling point contaminant component, is efficiently removed. There is a problem that it becomes difficult.

When a cleaning agent in which low-boiling-point contaminants have not been sufficiently removed is circulated in the distillation purification step, the cleaning efficiency in the cleaning step is reduced, and the significance of providing the cleaning agent purification step is impaired. There is a problem.

Further, when a substance containing chlorine such as chlorinated paraffin (for example, an extreme pressure agent used in the cutting process) is used in the process of manufacturing the object to be cleaned, the substance containing chlorine is decomposed. Chlorine compounds (a type of low-boiling point contaminants) may be generated due to this, but if a cleaning agent (regenerated cleaning agent) that does not sufficiently remove this chlorine compound is recycled, it will adhere to the surface of the object to be cleaned. As a result, the chlorine compound in the remaining cleaning agent corrodes the object to be cleaned.

The present invention solves the above problems by efficiently separating the low boiling point stain component and the high boiling point stain component from the hydrocarbon-based detergent containing the low boiling point stain component and the high boiling point stain component. , It is possible to maintain a constant cleanliness of the cleaning agent in the cleaning agent regeneration device and the cleaning device capable of recovering a sufficiently purified cleaning agent, and to perform continuous and stable cleaning. An object is to provide a cleaning device system.

[0010]

In order to achieve the above object, a cleaning agent regenerating apparatus of the present invention is a cleaning agent regenerating apparatus for regenerating a hydrocarbon type cleaning agent used in a cleaning step of an object to be cleaned. In the apparatus, a hydrocarbon-based detergent containing a low boiling point contaminant component such as water and a high boiling point contaminant component such as oil mixed in the cleaning step is higher than the boiling point of water at the operating vacuum degree of the following flash can by 10 ° C. or more, And a pre-heater for heating to a predetermined temperature lower than the boiling point of the cleaning agent, and a cleaning agent heated to a predetermined temperature in the pre-heating apparatus for flashing by exposing it to a vacuum to evaporate and separate low-boiling point contaminant components. And a distiller for distilling the cleaning agent from which the low-boiling-point soil component has been separated in the flash can to separate the cleaning agent and the high-boiling-point soil component.

In the present invention, the hydrocarbon-based cleaning agent is not limited to a cleaning agent composed of only a hydrocarbon-based material, and a cleaning agent in which an alcohol-based or aromatic-based material is added to the cleaning agent is also used. It is a concept that also includes.

Further, the distiller is characterized in that it is equipped with a thin film flow down type heating can and a droplet separator for separating droplets entrained in the evaporated cleaning agent vapor.

Further, the above-mentioned droplet separator is characterized by having a rectification function.

Further, the cleaning apparatus system of the present invention is a combination of a cleaning apparatus for cleaning an object to be cleaned with a hydrocarbon type cleaning agent and the cleaning agent regenerating apparatus of the present invention. The cleaning agent is sent to the cleaning agent regenerator at a predetermined ratio to regenerate the cleaning agent, and the regenerated cleaning agent is circulated to the cleaning apparatus to maintain the cleanliness of the cleaning agent in the cleaning apparatus constant. It is characterized by having done.

[0015]

In the cleaning agent regenerating apparatus of the present invention, the preheater contains the dirt component heated to a predetermined temperature which is higher than the boiling point of water at the operating vacuum degree of the flash can by 10 ° C. or more and lower than the boiling point of the cleaning agent. By supplying a hydrocarbon-based cleaning agent to a flash can and exposing it to a vacuum to flush the cleaning agent, low-boiling point contaminant components are efficiently evaporated and separated.

[0016] Then, the cleaning agent from which the low-boiling-point soil component has been separated in the flash can is introduced into a distiller and distilled, whereby a clean cleaning agent containing no high-boiling-point soil component is efficiently recovered as a fraction. A detergent containing a high content of high-boiling point contaminants is separated as a bottom residue.

Further, by using a thin-film flow down type heating can as the heating can of the above-mentioned distiller, it is possible to prevent the cleaning agent and dirt components (for example, chlorinated paraffin) from being affected by heat, and heat during heating. It is possible to efficiently prevent the occurrence of decomposition, and by installing a droplet separator to separate the droplets entrained in the evaporated cleaning agent vapor, it is possible to prevent the contamination of high boiling point contaminant components derived from the droplets into the fraction. It is possible to prevent and efficiently collect a clean cleaning agent.

Further, as the above-mentioned droplet separator, for example, a droplet separator having a rectification function, such as a droplet separator filled with a filler, is used to efficiently separate the cleaning agent and the high boiling point contaminant component. Therefore, the cleanliness of the regenerated cleaning agent can be further improved.

Further, in the cleaning apparatus system of the present invention, the cleaning apparatus for cleaning the object to be cleaned with the hydrocarbon type cleaning agent and the cleaning agent regenerating apparatus of the present invention are combined and used in the cleaning apparatus. The cleaning agent is sent to the cleaning agent regenerator at a predetermined rate to be regenerated,
By circulating the regenerated cleaning agent to the cleaning device,
The cleanliness of the cleaning agent in the cleaning device is kept constant.
Therefore, the object to be cleaned can be stably and efficiently cleaned.

[0020]

EXAMPLES Examples of the present invention will be shown below to describe the features thereof in more detail.

FIG. 1 is a diagram showing the structure of a cleaning apparatus system in which a cleaning agent regenerating apparatus and a cleaning apparatus according to an embodiment of the present invention are combined.

This cleaning device system is constructed by combining a cleaning device A and a cleaning agent regenerating device B.

In this embodiment, the cleaning apparatus A includes a cleaning tank 1 for cleaning an object to be cleaned, a circulation line 2 for circulating a cleaning agent in the cleaning tank 1, and a circulation inserted in the middle of the circulation line 2. It comprises a pump 3 and a replenishing tank 4 for containing a cleaning agent to be replenished. The circulation line 2
A liquid sending line 32 for sending the cleaning agent to the cleaning agent regenerating apparatus B is connected to. The configuration of the cleaning device is not limited to this, and various other configurations are possible.

On the other hand, the detergent regenerator B is a hydrocarbon containing a low boiling point contaminant component such as water mixed in the cleaning step and a high boiling point contaminant component such as oil extracted from the circulation line 2 of the cleaning device A. A preheater 11 for heating the system cleaning agent to a predetermined temperature, and a flash can 12 for exposing the cleaning agent heated to a predetermined temperature by the preheating apparatus 11 to a vacuum for flashing and evaporating and separating the low boiling point contaminant components. And a distiller 13 for distilling the cleaning agent from which the low-boiling-point soil component has been separated in the flash can 12 and separating the cleaning agent and the high-boiling-point soil component.
It is composed of and.

The preheater 11 also functions as a cushion tank for holding the contaminated cleaning agent,
By supplying steam to the coil 14 disposed inside, the cleaning agent can be heated to a predetermined temperature.

The flash can 12 is constructed so that a predetermined vacuum degree can be obtained by sucking the flash can 12 with a vacuum pump 15. Also, vacuum line 1
Bent condenser 1 on the front side of vacuum pump 15
7 is provided, and a low-boiling-point waste liquid line 2 for extracting the low-boiling-point waste liquid condensed in the vent condenser 17 is further provided.
In FIG. 8, a low boiling point waste liquid pot 29 for retaining condensed low boiling point waste liquid is arranged.

The distiller 13 is a thin film flow down type heating can 18,
It is configured to include a droplet separator 19 for separating droplets entrained in the evaporated cleaning agent vapor, and further, the evaporation can 20 below the heating can 18 and the cleaning agent in the evaporation can 20 are transferred to the heating can 18. A circulation supply line 21 for circulation supply and a circulation supply pump 22 arranged in the circulation supply line 21 are provided.

The droplet separator 19 is formed by filling the cylindrical portion 23 with the filling material 24 at a predetermined height, and by refluxing at a prescribed ratio, the number of theoretical plates in the droplet separator 19 is increased. Is constructed so that a rectification effect of about 5 stages can be obtained.

A condenser 25 for cooling and condensing the cleaning agent vapor that has passed through the droplet separator 19 is disposed downstream of the droplet separator 19.

Further, a distillate pump 27 is provided in the distillate line 26 for collecting the condensate (regeneration detergent) condensed in the condenser 25, and the regeneration detergent is the distillate. It is configured to be circulated to the replenishment tank 4 via the line 26.

Further, a high boiling point waste liquid line 30 for discharging a cleaning agent containing a high percentage of high boiling point stain components remaining inside is connected to the evaporator 20. The high boiling point waste liquid line 30 is connected to the high boiling point waste liquid line 30. A high-boiling-point waste liquid pot 31 for holding the high-boiling-point waste liquid is provided.

In the cleaning apparatus system configured as described above, the cleaning apparatus A cleans the object to be cleaned, and the cleaning agent used for cleaning continuously flows through the liquid delivery line 32 at a predetermined ratio. Preheater for cleaning agent regeneration device B
Sent to 1.

Then, the cleaning agent is heated to a predetermined temperature by the preheater 11. The heating temperature of the cleaning agent in the preheater 11 is higher than the boiling point of water in the operating vacuum degree of the flash can 12 by 10 ° C. or more from the viewpoint of efficiently evaporating low boiling point contaminant components such as water in the flash can 12. It is preferable to heat to a predetermined temperature lower than the boiling point of. Further, in the case where the detergent or dirt component (for example, chlorinated paraffin) is significantly decomposed within the above temperature range, it is heated to a temperature lower than the temperature at which the decomposition is remarkable to suppress the occurrence of thermal decomposition. Preferably. Further, the heating temperature in the preheater 11 is preferably 125 ° C. or lower if other conditions permit.

Then, the cleaning agent heated to a predetermined temperature by the preheater 11 is supplied to the flash can 12 and exposed to a predetermined vacuum for flashing, whereby the low boiling point contaminant components are efficiently evaporated and separated. To be done.

Further, the cleaning agent from which the low-boiling-point soil component has been separated in the flash can 12 is sent to the distiller 13 and distilled, and a clean cleaning agent containing no high-boiling-point soil component is recovered as a distillate. A cleaning liquid containing a high-boiling point stain component in a high content is separated as a bottom residue. In addition, in this embodiment, since the thin-film flow-down type heating can is used as the heating can 18 of the distiller 13, the thermal influence on the cleaning agent and the dirt component (for example, chlorinated paraffin) is suppressed, and the heat can be reduced. It is possible to efficiently prevent the generation of an undesirable substance due to the occurrence of decomposition or thermal decomposition. Further, since the droplet separator 19 for separating the droplets entrained in the evaporated cleaning agent vapor is provided, it is possible to prevent a high boiling point contaminant component derived from the droplets from being mixed into the distillate and to clean the cleaning agent. Can be efficiently collected.

Further, in this embodiment, since the droplet separator 19 is a droplet separator having a rectification effect, which is obtained by filling the filling material 24 to a predetermined height, the distiller 13 is used.
In the above, it becomes possible to more efficiently separate the cleaning agent and the high boiling point stain component, and it is possible to further improve the cleanliness of the regenerated cleaning agent.

Further, in the cleaning apparatus system of the above embodiment, the cleaning apparatus A for cleaning the object to be cleaned with the hydrocarbon type cleaning agent and the cleaning agent regenerating apparatus B are combined. The used cleaning agent is sent to the cleaning agent regenerating apparatus B at a predetermined ratio to be regenerated, and the regenerated cleaning agent is circulated to the cleaning apparatus A, thereby maintaining the cleanliness of the cleaning agent in the cleaning apparatus A constant. can do. Therefore, the object to be cleaned can be stably and efficiently cleaned.

Further, in the above-mentioned embodiment, the case where the thin film downflow type heating can is used as the heating can 18 of the distiller 13 has been described. However, in addition to the thin film downflow type heating can, a thin film rising type heating can, etc. Can also be used, and it is also possible to use other types of heating cans.

In the above embodiment, the case where the droplet separator 19 of the distiller 13 is a droplet separator in which the cylindrical portion 23 is filled with the filling material 24 at a predetermined height has been described. The configuration of the droplet separator is not limited to this, and it is possible to use a droplet separator having another configuration.

In the above-mentioned embodiment, the case where the droplet separator having the theoretical plate number of about 5 is used to obtain the rectification effect has been described, but when the height of the droplet separator is not restricted. It is also possible to further increase the height of the slag and obtain a greater rectification effect.

The invention of the present application is not limited to the above-mentioned embodiment, but the structures of the preheater and the flash can, the structure of the distiller, and the concrete structure of the heating can and the droplet separator constituting the distiller. Alternatively, with respect to the configuration of the cleaning device that constitutes the cleaning device system of the present invention, various applications and modifications can be made within the scope of the invention.

[0042]

As described above, according to the cleaning agent regenerating apparatus of the present invention, the hydrocarbon type cleaning agent is higher than the boiling point of water at the operating vacuum degree of the flash can by 10 ° C. or more and lower than the boiling point of the cleaning agent. The preheater that heats up to the temperature, the flash can that exposes the cleaning agent heated by the preheater to vacuum and separates the low boiling point contaminant components, and the cleaning agent that separates the low boiling point contaminant components is distilled. Since it is equipped with a distiller that separates the cleaning agent and the high-boiling-point stain components, it efficiently separates the low-boiling-point and high-boiling-point stain components from the hydrocarbon-based cleaning agent that contains the fouling components. Thus, it becomes possible to efficiently recover a sufficiently purified detergent.

Further, by using a thin film downflow type heating can and a droplet separator for separating the droplets entrained in the evaporated cleaning agent vapor as the distillation apparatus,
It is possible to efficiently prevent the thermal decomposition from occurring by suppressing the heat effect on the cleaning agent and dirt components, and also to prevent the contamination of the high boiling point dirt components derived from the droplets into the distillate fraction for cleaning. It is possible to efficiently collect various cleaning agents.

Further, by using a droplet separator having a rectification function, it is possible to more efficiently separate the detergent and the high-boiling-point contaminants, thereby further improving the cleanliness of the regenerated detergent. Can be made.

Further, since the cleaning apparatus system of the present invention combines the cleaning apparatus for cleaning the object to be cleaned with the hydrocarbon type cleaning agent and the cleaning agent regenerating apparatus of the present invention,
By circulating the cleaning agent regenerated in the cleaning agent recycling apparatus to the cleaning apparatus, it is possible to maintain the cleanliness level of the cleaning agent in the cleaning apparatus constant, and to wash the object to be washed stably and efficiently. Will be possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a cleaning apparatus system according to an embodiment of the present invention.

[Explanation of symbols]

 A cleaning device B cleaning agent regeneration device 1 cleaning tank 2 circulation line 3 circulation pump 4 replenishment tank 11 preheater 12 flash can 13 distiller 14 coil 15 vacuum pump 16 vacuum line 17 vent condenser 18 heating can 19 splash separator 20 evaporation can 21 Circulation Supply Line 22 Circulation Supply Pump 23 Cylindrical Part 24 Filler 25 Condenser 26 Distillate Line 27 Distillate Pump 28 Low Boiling Waste Liquid Line 29 Low Boiling Waste Liquid Pot 30 High Boiling Waste Liquid Line 31 High Boiling Waste Liquid Pot 32 Liquid Transfer line

Front Page Continuation (72) Inventor Yoichi Uematsu 2-1-2, Kisejijima, Amagasaki City, Hyogo Prefecture Kimura Kakoki Co., Ltd.

Claims (4)

[Claims] 1. A cleaning agent regenerating apparatus for regenerating a hydrocarbon-based cleaning agent used in a cleaning step of an object to be cleaned, comprising a low boiling point contaminant component such as water mixed in the cleaning step and a high boiling point such as an oil component. Use a hydrocarbon-based cleaning agent containing dirt components from the boiling point of water at the operating vacuum of the flash can below 10
A preheater that heats to a predetermined temperature higher than ℃ and lower than the boiling point of the cleaning agent, and the cleaning agent heated to a predetermined temperature in the preheating apparatus is exposed to vacuum to flash to evaporate low-boiling point contaminants. A cleaning agent regeneration device comprising: a flash can for separation and a distiller for distilling the cleaning agent from which the low boiling point soil component has been separated in the flash can to separate the cleaning agent and the high boiling point soil component. 2. The distiller comprises a thin film flow down type heating can,
The cleaning agent reclaiming apparatus according to claim 1, further comprising: a droplet separator for separating droplets entrained in the evaporated cleaning agent vapor. 3. The cleaning agent regenerating apparatus according to claim 2, wherein the droplet separator has a rectification function. 4. A cleaning device for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent and the cleaning agent reclaiming device according to claim 1 are combined, and the cleaning agent used in the cleaning device is mixed at a predetermined ratio. The cleaning agent is sent to the cleaning agent regenerating apparatus to regenerate the cleaning agent, and the regenerated cleaning agent is circulated to the cleaning apparatus to maintain the cleanliness of the cleaning agent in the cleaning apparatus constant. Cleaning equipment system.