JP2725147B2 - Cleaning agent regeneration device and cleaning device system - Google Patents

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-based 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 apparatus system comprising:

[0002]

2. Description of the Related Art
As an industrial cleaning agent for cleaning electronic parts and mechanical parts, a chlorofluorocarbon-based solvent such as a fluorocarbon-based cleaning agent or trichloroethane has been used. However, these industrial detergents have a problem of causing destruction of the ozone layer, pollution of groundwater, and deterioration of the working environment, and their use is being regulated.

For this reason, there has been proposed a method of performing cleaning using a hydrocarbon-based cleaning agent as a cleaning agent other than a chlorine-based solvent such as a chlorofluorocarbon-based cleaning agent or trichloroethane.

[0004] By the way, the same applies to the case where cleaning is performed using another cleaning agent. However, when cleaning is performed using a hydrocarbon-based cleaning agent, low-boiling dirt components such as moisture and the like are contained in the cleaning agent.
As the high-boiling dirt components such as processing oil accumulate, the cleaning efficiency decreases.

Therefore, a method of distilling a detergent has been proposed and implemented as a method of separating (refining) the detergent by separating these low- and high-boiling dirt components.
It is not always easy to efficiently separate dirt components such as water and oil.

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

[0007] If a cleaning agent from which low-boiling-point dirt components are not sufficiently removed in the distillation purification step is circulated and used, the cleaning efficiency in the cleaning step is reduced, and the significance of providing the cleaning agent purification step is lost. There is a problem.

Further, when a chlorine-containing substance such as chlorinated paraffin (for example, an extreme pressure agent used in the cutting step) is used in the manufacturing process of the object to be cleaned, the decomposition of the chlorine-containing substance is performed. May produce chlorine compounds (a kind of low-boiling dirt component). However, if a cleaning agent that does not sufficiently remove the chlorine compound (recycled cleaning agent) is used in circulation, it will adhere to the surface of the object to be cleaned. There is a problem that the object to be cleaned is corroded by the chlorine compound in the cleaning agent remaining as a result.

The present invention solves the above-mentioned problems, and efficiently separates low-boiling dirt components and high-boiling dirt components from hydrocarbon-based cleaning agents containing low-boiling dirt components and high-boiling dirt components. It is possible to maintain a constant degree of cleanliness of the cleaning agent in the cleaning agent regenerating device and the cleaning device capable of recovering a sufficiently purified cleaning agent, and to continuously perform stable cleaning. It is an object to provide a cleaning device system.

[0010]

In order to achieve the above object, a cleaning agent regenerating apparatus according to the present invention comprises a cleaning agent regenerating apparatus for regenerating a hydrocarbon-based cleaning agent used in a cleaning process of an object to be cleaned. In the apparatus, a hydrocarbon-based cleaning agent containing a low-boiling dirt component such as water and a high-boiling dirt component such as oil mixed in the cleaning step is higher than the boiling point of water by 10 ° C. or more at the operating vacuum of the flash can below, A preheater for heating to a predetermined temperature lower than the boiling point of the cleaning agent, and a flash can for exposing and vacuuming the cleaning agent heated to a predetermined temperature in the preheater to evaporate and separate low-boiling dirt components. And a thin-film falling-type heating can, and the evaporated cleaning agent
A droplet separator for separating droplets accompanying steam is provided.
Ete becomes, it is characterized in that distilling the detergent separation of the low boiling polluting components in the flash can comprises a distiller for separating the cleaning agent and high-boiling soil components.

In the present invention, the hydrocarbon-based cleaning agent is not limited to a cleaning agent composed of only a hydrocarbon-based substance, but may be a cleaning agent to which an alcohol-based or aromatic-based substance is added. It is a concept that also includes

Further , the cleaning agent regenerating apparatus of the present invention is characterized in that the droplet separator has a rectification function.

Further, the cleaning apparatus system of the present invention combines a cleaning apparatus for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent and the cleaning agent regeneration apparatus of the present invention, and uses the cleaning apparatus used in the cleaning apparatus. agent, the thin at a predetermined ratio
The cleaning agent is regenerated by sending the cleaning agent to the cleaning agent regenerating device equipped with a film falling-type heating can, and the regenerated cleaning agent is circulated to the cleaning device to keep the cleaning degree of the cleaning agent constant in the cleaning device. It is characterized by maintaining it.

[0014]

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

In addition, the cleaning agent from which the low-boiling-point dirt components have been separated in the flash can is introduced into a still to be distilled, so that a clean detergent containing no high-boiling-point dirt components can be efficiently recovered as a fraction. A cleaning agent containing a high boiling point component at a high content is separated as a bottom residue.

Further, since a thin-film falling-type heating can is used as the heating can of the above-mentioned still, a cleaning agent and a dirt component (for example, chlorinated paraffin) are thermally affected.
By suppressing, with the occurrence of thermal decomposition during heating can be prevented efficiently, by providing a splash separator for separating the splash accompanying the evaporated cleaning agent vapor, high boiling derived splash It becomes possible to prevent the contamination of the dirt component into the fraction and efficiently collect a clean detergent.

Further, by using a device having a rectification function, such as a droplet separator filled with a filler, as the above-mentioned droplet separator, the cleaning agent and the high-boiling-point soil component can be more efficiently removed. Separation is possible, and the cleanliness of the regenerated cleaning agent can be further improved.

In the cleaning apparatus system of the present invention, the cleaning apparatus for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent is combined with the cleaning agent regenerating apparatus of the present invention. The cleaning agent is sent at a predetermined ratio to a cleaning agent regenerating apparatus including a thin film falling-type heating can and a droplet separator, and is subjected to thermal decomposition and high boiling derived from droplets.
The cleanliness of the cleaning agent in the cleaning device is kept constant by recycling the cleaning agent at a predetermined ratio while efficiently regenerating the cleaning agent while suppressing the contamination of the dirt component into the fraction. Is maintained. Therefore, the object to be cleaned can be stably and efficiently cleaned.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, and features thereof will be described in more detail.

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

This cleaning device system is constituted by combining a cleaning device A and a cleaning agent regeneration device B.

In this embodiment, a 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 line inserted in the circulation line 2. It is provided with a pump 3 and a replenishing tank 4 for storing a cleaning agent to be replenished. In addition, circulation line 2
Is connected to a liquid sending line 32 for sending the detergent to the detergent regenerating apparatus B. The configuration of the cleaning device is not limited to this, and various other configurations are possible.

On the other hand, the cleaning agent regenerating apparatus B comprises a hydrocarbon containing low-boiling dirt components such as water and high-boiling dirt components such as oil, which are extracted from the circulation line 2 of the above-mentioned cleaning device A and mixed in the cleaning step. A preheater 11 for heating the cleaning agent of the system to a predetermined temperature, a flash can 12 for exposing the cleaning agent heated to a predetermined temperature by the preheater 11 to vacuum and flashing, and evaporating and separating low-boiling dirt components. And a distillation device 13 for distilling the cleaning agent from which the low-boiling dirt component has been separated in the flash can 12 to separate the cleaning agent and the high-boiling dirt component.
And is provided with.

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

The flash can 12 is provided with the vacuum pump 1
It is configured such that a predetermined degree of vacuum can be obtained by suctioning the sample with the pressure 5. The vacuum line 16
However, a vent condenser 17 is provided in front of the vacuum pump 15.
And a low-boiling-point waste liquid line 28 for extracting the low-boiling-point waste liquid condensed in the vent condenser 17.
Is provided with a low boiling point waste liquid pot 29 for retaining the condensed low boiling point waste liquid.

The still 13 has a thin-film falling-type heating can 18,
The apparatus is provided with a droplet separator 19 for separating the droplets accompanying the evaporated cleaning agent vapor. Further, the evaporating container 20 below the heating can 18 and the cleaning agent in the evaporating container 20 are supplied to the heating can 18. A circulation supply line 21 for circulating supply and a circulation supply pump 22 provided in the circulation supply line 21 are provided.

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

Further, a condenser 25 for cooling and condensing the cleaning agent vapor that has passed through the droplet separator 19 is provided downstream of the droplet separator 19.

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

The evaporator 20 is connected to a high-boiling waste liquid line 30 for discharging a cleaning agent containing a high proportion of high-boiling dirt components remaining therein. The high-boiling waste liquid line 30 is connected to the high-boiling waste liquid line 30. A high-boiling-point waste liquid pot 31 for holding high-boiling-point waste liquid is provided.

In the cleaning system configured as described above, the cleaning object A is used to clean the object to be cleaned, and the cleaning agent used for cleaning is continuously supplied at a predetermined rate via the liquid sending line 32. Preheater 1 of cleaning agent regeneration device B
Sent to 1.

The cleaning agent is heated by the preheater 11 to a predetermined temperature. The heating temperature of the cleaning agent in the preheater 11 is higher than the boiling point of water at the operating vacuum of the flash can 12 by 10 ° C. or more, from the viewpoint of efficiently evaporating low-boiling dirt components such as water in the flash can 12. Is preferably heated to a predetermined temperature lower than the boiling point. Further, in the case where the decomposition of a cleaning agent or a stain component (for example, chlorinated paraffin) becomes remarkable in the above temperature range, the temperature is reduced to a temperature lower than the temperature at which the decomposition becomes remarkable, thereby suppressing the occurrence of thermal decomposition. Is preferred. Further, the heating temperature in the preheater 11 is preferably set to 125 ° C. or lower if other conditions allow.

Then, the cleaning agent heated to a predetermined temperature by the preheater 11 is supplied to a flash can 12, which is exposed to a predetermined vacuum and flashes, so that low-boiling dirt components are efficiently evaporated and separated. Is done.

The cleaning agent from which the low-boiling dirt components have been separated in the flash can 12 is sent to the still 13 and distilled, and a clean cleaning agent containing no high-boiling dirt components is recovered as a fraction. A washing liquid containing a high-boiling-point dirt component at a high content is separated as a residue. Furthermore , since a thin-film falling-type heating can is used as the heating can 18 of the still 13, the thermal influence on the cleaning agent and the dirt component (for example, chlorinated paraffin) is suppressed, and the thermal decomposition and the thermal decomposition are prevented. Generation of undesired substances due to generation can be efficiently prevented. Further, since the droplet separator 19 for separating the droplets accompanying the vaporized cleaning agent vapor is provided, it is possible to prevent the high boiling point dirt components derived from the droplets from being mixed into the fraction and to provide a clean cleaning agent. Can be efficiently collected.

Further, in this embodiment, since the droplet separator 19 having a rectifying effect obtained by filling the filler 24 at a predetermined height is used as the droplet separator 19, the distillation device 13 is used.
In the above, it becomes possible to more efficiently separate the detergent and the high-boiling-point stain component, and the cleanliness of the regenerated detergent can be further improved.

In the cleaning apparatus system of the above embodiment, the cleaning apparatus A for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent and the cleaning agent regenerating apparatus B are combined. The used cleaning agent is sent to the cleaning agent regenerating device B at a predetermined ratio to be regenerated, and the regenerated cleaning agent is circulated to the cleaning device A to maintain the cleanliness of the cleaning agent in the cleaning device A at a constant level. can do. Therefore, the object to be cleaned can be stably and efficiently cleaned.

Further, in the above embodiment, the case where the droplet separator 19 in which the cylindrical portion 23 is filled with the filler 24 by a predetermined height is used as the droplet separator 19 of the still 13 has been described. The configuration of the droplet separator is not limited to this, and a droplet separator having another configuration can be used.

In the above embodiment, a case was described in which a droplet separator having a theoretical plate number of about 5 was used so as to obtain an effect of rectification. Can be configured to have a greater height to obtain a greater rectification effect.

The present invention is not limited to the above embodiments, but includes structures such as a preheater and a flash can, a structure of a still, and a specific structure of a heating can and a droplet separator constituting the still. Alternatively, various applications and modifications can be made within the scope of the invention with respect to the configuration of the cleaning apparatus constituting the cleaning apparatus system of the present invention.

[0040]

As described above, the cleaning agent regenerating apparatus of the present invention uses a hydrocarbon-based cleaning agent at a predetermined temperature higher than the boiling point of water by 10 ° C. or higher and lower than the boiling point of the cleaning agent at the operating vacuum of the flash can. Preheater to heat to the temperature of the preheater, flash can to separate the low boiling point dirt components by exposing the cleaning agent heated by the preheater to vacuum and flash, thin film
Dropping-type heating cans and droplets accompanying vaporized cleaning agent vapor
And a splash separator for separating it, because it is composed and a distiller in which the lower boiling point soil components to separate the detergent and distilled detergent separated and higher boiling soil components , from a hydrocarbon-based cleaning agent containing soil components by efficiently separating low-boiling soil components and high boiling soil components and becomes fully purified detergent can be efficiently recovered
In both cases, as a still, a thin-film falling type heating can and an evaporator
Separation to separate the droplets entrained in the cleaning agent vapor
Since a distilling device equipped with a dispenser is used, cleaning
To prevent thermal decomposition efficiently
And high boiling point fouling caused by droplets
Prevents cleaning components from being mixed into fractions
It becomes possible to collect well.

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

[0042] The cleaning system of the present invention, a cleaning device for cleaning the object to be cleaned with a hydrocarbon-based cleaning agent, and a detergent reproducing apparatus of the present invention are combined,
The cleaning agent used in the cleaning device
Regeneration of cleaning agent with membrane falling heating can and droplet separator
It is sent to the equipment, and it has a high boiling point
Is efficiently regenerated while suppressing the mixing of
In both cases , the regenerated cleaning agent is circulated to the cleaning device at a predetermined rate, and thus the cleanliness of the cleaning agent in the cleaning device is improved.
There is maintained constant, it is possible to wash stably and efficiently the object to be cleaned.

[Brief description of the drawings]

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

[Explanation of symbols]

 Reference Signs List A cleaning device B cleaning agent regenerating device 1 cleaning tank 2 circulation line 3 circulation pump 4 replenishment tank 11 preheater 12 flash can 13 evaporator 14 coil 15 vacuum pump 16 vacuum line 17 vent condenser 18 heating can 19 droplet separator 20 evaporator DESCRIPTION OF SYMBOLS 21 Circulation supply line 22 Circulation supply pump 23 Cylindrical part 24 Filler 25 Condenser 26 Distillate line 27 Distillate pump 28 Low boiling point waste liquid line 29 Low boiling point waste liquid pot 30 High boiling point waste liquid line 31 High boiling point waste liquid pot 32 Liquid sending line

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoichi Uematsu 2-1-2, Kuse-Terashima, Amagasaki-shi, Hyogo Kimura Kakoki Co., Ltd. (56) References JP-A-6-57468 (JP, A)

Claims (3)

(57) [Claims] 1. A cleaning agent regenerating apparatus for regenerating a hydrocarbon-based cleaning agent used in a cleaning process of an object to be cleaned, comprising: a low-boiling dirt component such as water and a high boiling point such as oil mixed in the cleaning process. A hydrocarbon-based cleaning agent containing a dirt component was added to the flash can at a temperature of 10 ° C.
A preheater that heats to a predetermined temperature higher than or equal to ℃ and lower than the boiling point of the cleaning agent, and the cleaning agent heated to a predetermined temperature in the preheater is subjected to vacuum and flashed to evaporate low boiling point dirt components. Separated flash cans, thin-film heating cans, and entrained cleaning vapors
A droplet separator for separating droplets, and a distillation device for distilling a cleaning agent from which low-boiling dirt components have been separated in the flash can and separating the cleaning agent and high-boiling dirt components. A cleaning agent regenerating device characterized by the above-mentioned. 2. The cleaning agent regenerating apparatus according to claim 1, wherein the droplet separator constituting the distiller has a rectification function. 3. A cleaning device for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent, and the cleaning agent regenerating device according to claim 1 or 2 , wherein the cleaning agent used in the cleaning device is provided in a predetermined manner. The cleaning agent is regenerated by sending the cleaning agent to the cleaning agent regenerating device equipped with a thin-film falling-type heating can at a ratio, and the regenerated cleaning agent is circulated to the cleaning device to thereby clean the cleaning agent in the cleaning device. A cleaning device system characterized by maintaining a constant.