JPH08246172A - Cleaning agent regeneration device and cleaning device system - Google Patents

Abstract

(57) [Summary] [Purpose] Efficiently separates water-soluble stain components, low-boiling-point stain components, and high-boiling-point stain components caused by flux from the detergent to obtain a purified detergent (regenerated detergent). to recover. [Structure] A preheater 11, a flash can 12, a distiller 13, and a water-soluble soil component separating means using ion exchange fibers for separating water-soluble soil components in a cleaning agent distilled and separated in the distiller 13. 10 is combined, and the cleaning agent containing the dirt component is heated to a predetermined temperature in the preheater 11 and flashed in the flash can 12 to evaporate and separate the low boiling point dirt component, and then the low boiling point dirt component is separated. After the cleaning agent is sent to the distiller 13 and distilled to separate the cleaning agent and the high-boiling-point soil component, the water-soluble soil component separation means 10 using ion-exchange fiber separates the water-soluble soil component to regenerate and wash. Collect the agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent reclaiming apparatus and a cleaning agent reclaiming apparatus for reclaiming a hydrocarbon type cleaning agent used for cleaning electronic parts and machine parts to which flux for soldering is attached. The present invention relates to a cleaning device system that is a combination of an agent recycling device and a cleaning device.

[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 chlorine-based solvent such as a CFC-based cleaning agent or trichloroethane.

By the way, when cleaning an object to be cleaned such as flux used in a soldering process by using a hydrocarbon type cleaning agent, usually, a cleaning method in which animal and vegetable oils and fats are added to the hydrocarbon type cleaning agent is used. Agent, chain alcohol solvent,
A cleaning agent to which an aromatic compound-based solvent or the like is added (hereinafter, these cleaning agents are simply referred to as "hydrocarbon-based cleaning agent") is used.

When the hydrocarbon-based cleaning agent is used to clean an object to be cleaned to which flux for soldering is attached, the cleaning agent has a low boiling point contaminant such as water and a high boiling point such as processing oil. Dirt component, rosin which is a component of flux, organic amine, hydrochloric acid (HCl), hydrogen bromide (HBr)
And other organic acids such as acetic acid, formic acid, and oxalic acid generated by decomposition of the cleaning agent, and organic compounds generated by the reaction of these organic acids with metal components such as Cu in the cleaning agent. A metal salt of acid or the like is accumulated in the cleaning agent as a stain component. Further, when these dirt components are accumulated in the cleaning agent, there is a problem that the cleaning efficiency is lowered, and there is a problem that a metal salt of an organic acid or the like accelerates the decomposition of the cleaning agent.

[0006] Therefore, these stain components (low boiling point stain component, high boiling point stain component, flux-derived stain component,
Separation of metal salts of organic acids, etc. to regenerate the cleaning agent (purification)
As a method of doing so, a method of distilling a detergent has been proposed and implemented.

[0007] However, it is not always easy to efficiently separate contaminants such as water and oil, especially when, for example, a processing oil that forms an emulsion with water is mixed in the cleaning agent. However, it is difficult to efficiently remove water, which is a low boiling point stain component.

Further, since HCl, HBr, etc., which are contaminants due to the flux, are distilled out together with the cleaning agent in the distillation step, it is difficult to separate them. And HC
When the regenerated cleaning agent mixed with 1 or HBr is circulated and used, there is a problem that the cleaning agent containing HCl or HBr adheres to the surface of the cleaned object and corrodes the cleaned object.

The present invention solves the above-mentioned problems and efficiently separates the dirt component from the hydrocarbon-based cleaning agent used for cleaning the object to be cleaned to which flux or the like has adhered and sufficiently purifies it. A cleaning agent system capable of recovering the cleaned cleaning agent and a cleaning apparatus system capable of maintaining a constant cleanliness of the cleaning agent in the cleaning apparatus and performing stable cleaning continuously. The purpose is to provide.

[0010]

In order to achieve the above object, the cleaning agent regenerating apparatus of the present invention regenerates the hydrocarbon type cleaning agent used for cleaning the object to be cleaned to which flux or the like is attached. In the cleaning agent reclaiming device, the preheater that heats the cleaning agent used in the cleaning step to a predetermined temperature and the cleaning agent that has been heated to a predetermined temperature in the preheating apparatus are flashed by exposing them to a vacuum to remove low boiling point contaminants. A flash can for evaporating and separating the components, a distiller for distilling the cleaning agent in which the low boiling point soil component has been separated in the flash can, and a separation of the cleaning agent and the high boiling point soil component, and a distillation separation in the distiller. And a water-soluble soil component separating means using ion-exchange fibers for separating water-soluble soil components in the cleaning agent.

Further, the cleaning apparatus system of the present invention is used in the above cleaning apparatus by combining a cleaning apparatus for cleaning an object to be cleaned with flux etc. with a hydrocarbon type cleaning agent and the above cleaning agent regenerating apparatus. The cleaning agent is introduced into the cleaning agent regenerating apparatus 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. The feature is that it is maintained.

[0012]

In the detergent regenerating apparatus of the present invention, the detergent containing the dirt component is heated to a predetermined temperature in the preheater,
By supplying this to a flash can, exposing it to a vacuum, and flashing it, the low-boiling point stain components are efficiently evaporated,
To be separated.

Further, 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. For example, a cleaning agent containing a high-boiling point stain component such as rosin at a high content is separated as a bottom residue.

Then, the cleaning agent from which the low boiling point soil component and the high boiling point soil component have been removed as described above is brought into contact with the ion-exchange fiber in the water soluble soil component separating means, whereby the water solubility in the detergent is increased. Dirt components (eg HCl or H
Br or organic acids such as acetic acid, formic acid, oxalic acid, and metal salts of these organic acids) are efficiently separated. Since the ion exchange fiber has a large surface area and the like, it has a characteristic that the ion exchange rate is higher than that of a normal ion exchange resin, and it is possible to efficiently perform ion exchange.

Therefore, it becomes possible to efficiently remove various stain components such as the low-boiling-point stain component, the high-boiling-point stain component, and the stain component due to the flux to collect a clean cleaning agent.

Further, in the cleaning device system of the present invention, the cleaning device for cleaning the object to be cleaned to which flux or the like adheres with a hydrocarbon-based cleaning agent and the cleaning agent regenerating device of the present invention are combined. The cleaning agent used in the cleaning device is sent to the cleaning agent regenerating device at a predetermined ratio to be regenerated, and the regenerated cleaning agent is circulated to the cleaning device to clean the cleaning agent in the cleaning device. The degree is kept constant. Therefore, the object to be cleaned can be stably and efficiently cleaned.

[0017]

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.

The cleaning device system of this embodiment is a cleaning device system for cleaning electronic components to which flux has been adhered, which is used in, for example, a soldering process, and the cleaning devices A and cleaning devices A are used. It is configured by combining a cleaning agent regenerating apparatus B for regenerating the agent.

In this embodiment, the cleaning apparatus A includes a cleaning tank 1 for cleaning a substance to be cleaned with flux, a circulation line 2 for circulating a cleaning agent in the cleaning tank 1, and a circulation line 2 in the middle thereof. It comprises a circulating pump 3 inserted and a replenishing tank 4 for containing a cleaning agent to be replenished. The circulation line 2 is connected to a liquid sending line 32 for sending the cleaning agent to the cleaning agent 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 has a low boiling point contaminant component such as water and a high boiling point contaminant component extracted from the circulation line 2 of the above cleaning apparatus A, and a rosin and an organic substance caused by flux. Dirt components such as amine, HCl, and HBr, organic acids such as acetic acid, formic acid, and oxalic acid generated by decomposition of the cleaning agent, and these organic acids react with metal components such as Cu in the cleaning agent. A preheater 11 for heating a hydrocarbon-based cleaning agent containing a metal salt of an organic acid or the like as a stain component to a predetermined temperature, and a cleaning agent heated to a predetermined temperature by the preheater 11 are exposed to vacuum to be flushed, A flash can 12 that evaporates and separates low-boiling point soil components, and a distiller 1 that distills the cleaning agent from which low-boiling point soil components have been separated in the flash can 12 and separates the cleaning agent and high-boiling point soil components. When it is configured to include a water-soluble soil components separating means 10 for separating the water soluble soil components in distilled separated detergent in the distiller 13.

The water-soluble dirt component separating means 10 is
For example, as shown in FIG. 2, an ion exchange fiber (in this example, a weak acid type ion exchange fiber "N- manufactured by Toyobo Co., Ltd."
20 "(trade name) is formed into a cylindrical shape by arranging the ion exchange fiber structure 10a in the case 10b, and the cleaning agent is applied from the outside of the ion exchange fiber structure 10a. It is configured such that the water-soluble soil component in the cleaning agent is brought into contact with the ion exchange fiber structure 10a and separated by being passed through the inside. The configuration of the water-soluble soil component separating means 10 is not limited to this, and various configurations capable of reliably contacting the ion exchange fiber and the cleaning agent can be used.
The cleaning agent may be configured to pass from the inside to the outside of the ion exchange fiber structure 10a, and other configurations are possible.

Further, the preheater 11 is constructed so that the cleaning agent can be heated to a predetermined temperature by supplying steam to the coil 14 arranged inside.

Further, the flash can 12 is constructed so that a predetermined vacuum degree can be obtained by sucking with the vacuum pump 15. In addition, a vent condenser 17 is disposed on the vacuum line 16 in front of the vacuum pump 15, and a low boiling waste liquid line 28 for extracting the low boiling waste liquid condensed by the vent condenser 17 is further provided. A low boiling point waste liquid pot 29 for retaining the boiling point waste liquid is provided.

Further, the distiller 13 is a thin-film downflow type heating can 18, a droplet separator 19 for separating droplets accompanying the evaporated cleaning agent vapor, and an evaporation can disposed below the heating can 18. 20, a circulation supply line 21 for circulating and supplying the cleaning agent in the evaporator 20 to the heating can 18, a circulation supply line 21
And a circulation supply pump 22 and the like disposed in the.

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 droplet separator 19 has a theoretical plate number. 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 sending the condensate condensed in the condenser 25 (the cleaning agent from which the high boiling point soil components have been separated) to the water-soluble soil component separating means 10. It is arranged.

Further, a high boiling point waste liquid line 30 for discharging a cleaning agent containing a high proportion of high boiling point contaminants 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 device system configured as described above, the cleaning device A cleans the object to be cleaned to which the flux has adhered, and the cleaning agent used for cleaning passes through the liquid delivery line 32 at a predetermined ratio. Is continuously supplied to the preheater 11 of the cleaning agent regeneration device B, and is heated to a predetermined temperature. 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, and it is usually more preferable to heat to a temperature 20 to 40 ° C. higher than the boiling point of water in the operating vacuum degree of the flash can 12. Further, in the case where the detergent and the dirt component are remarkably decomposed within the above temperature range, it is preferable to suppress the thermal decomposition by heating to a temperature lower than the temperature at which the decomposition is remarkably increased. The heating temperature in the preheater 11 is
If other conditions permit, the temperature is preferably 125 ° C. or lower.

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

The cleaning agent from which the low-boiling-point stain component has been separated in the flash can 12 is sent to the distiller 13 and distilled, so that the high-boiling-point stain component such as rosin remains in the pot (the high-boiling-point stain component is in a high proportion). It is separated as a cleaning agent). 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 is suppressed, and the thermal decomposition or the thermal decomposition may occur. It is possible to efficiently prevent the generation of an undesirable substance. Further, since the droplet separator 19 for separating the droplets entrained in the evaporated cleaning agent vapor is provided, it is possible to prevent the high boiling point contaminant component derived from the droplets from being mixed in the fraction.

Then, the cleaning agent from which the high-boiling-point soil components have been separated by the distiller 13 is sent to the water-soluble soil component separating means 10 and comes into contact with the tubular ion-exchange fiber structure 10a made of ion-exchange fibers. As a result, water-soluble stain components (HCl and HBr caused by flux, organic acids such as acetic acid, formic acid and oxalic acid generated by decomposition of the cleaning agent, and these organic acids and metal components such as Cu in the cleaning agent) The metal salt of an organic acid produced by the reaction) is adsorbed on the ion exchange fiber and separated from the detergent. In the water-soluble stain component separation step, usually 99% or more of the water-soluble stain component is separated.

As described above, in the cleaning apparatus system of this embodiment, as the finishing treatment after the flash evaporation and distillation, the water-soluble soil component separating means 10 using the ion-exchange fiber is used. (HCI and HBr caused by flux, organic acids such as acetic acid, formic acid, and oxalic acid generated by decomposition of the cleaning agent, and organic acids generated by reaction between these organic acids and metal components such as Cu in the cleaning agent. Since it is designed to adsorb and separate metal salts of acids, etc., it is possible to regenerate the cleaning agent used to clean the object to be cleaned with flux etc., and efficiently collect a clean cleaning agent. .

In the above examples, the case where N-20 manufactured by Toyobo Co., Ltd. was used as the ion exchange fiber was explained, but the ion exchange fiber usable in the present invention is not limited to this. HCl,
Various ion exchange fibers capable of adsorbing and separating HBr and other water-soluble stain components can be used.

Further, in the above embodiment, the case where the water-soluble soil component separating means 10 using the ion-exchange fiber was placed after the flash evaporation and distillation steps was explained, but in some cases, before the flash evaporation and distillation steps. It is also possible to place it at the same time, or both before and after the flash evaporation and distillation steps.

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 and used in the cleaning apparatus A. The cleaning agent thus produced 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 to maintain the cleanliness of the cleaning agent in the cleaning apparatus A constant. be able to. 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 specific structure of the water-soluble dirt component separating means, the structure of the preheater or the flash can, the structure of the distiller,
Regarding a specific structure such as a heating can or a droplet separator that constitutes the distiller, or a configuration of a cleaning device that constitutes the cleaning device system of the present invention, within the scope of the gist of the invention,
It is possible to add various applications and modifications.

[0042]

As described above, the cleaning agent regeneration device of the present invention flushes the preheater for heating the cleaning agent to a predetermined temperature and the cleaning agent heated to a predetermined temperature in the preheater to have a low boiling point. A flash can that evaporates and separates the dirt components, a distiller that distills the cleaning agent from which the low boiling point dirt components have been separated in the flash can and separates the cleaning agent and the high boiling point dirt components, and a distillation device that distills and separates Since it is provided with a water-soluble soil component separating means using ion-exchange fiber for separating water-soluble soil components in the cleaning agent, it was used for cleaning an object to be cleaned with flux etc. It becomes possible to efficiently separate the low boiling point stain component, the high boiling point stain component, the water-soluble stain component, etc. from the detergent, and to efficiently recover the sufficiently purified detergent.

In the cleaning device system of the present invention, the cleaning device for cleaning the adherend to be cleaned such as flux with a hydrocarbon-based cleaning agent and the above-mentioned cleaning agent regenerating apparatus are combined, so that cleaning is performed. By circulating the cleaning agent regenerated in the agent recycling apparatus to the cleaning apparatus, it is possible to maintain the cleanliness of the cleaning agent in the cleaning apparatus constant, and to stably and efficiently wash the object to be cleaned. It 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.

FIG. 2 is a cross-sectional view schematically showing the structure of a water-soluble soil component separating means used in the detergent regenerating apparatus according to one 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 10 water-soluble dirt component separating means 10a ion exchange fiber structure 10b case 11 preheater 12 flash can 13 distiller 14 coil 15 vacuum pump 16 Vacuum line 17 Bent 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 point Waste liquid pot 30 High boiling waste liquid line 31 High boiling waste liquid pot 32 Liquid sending line

Claims (2)

[Claims] 1. A cleaning agent regenerator for regenerating a hydrocarbon-based cleaning agent used for cleaning an object to be cleaned to which flux or the like is attached, wherein the cleaning agent used in the cleaning step is heated to a predetermined temperature. Preheater, a flash can that exposes the cleaning agent heated to a predetermined temperature in the preheater to a vacuum, and flashes it to evaporate and separate low-boiling point stain components, and a low-boiling point stain component that separates in the flash can. The distilled cleaning agent is distilled to separate the cleaning agent and the high-boiling-point stain components, and the water-soluble stain component in the cleaning agent separated by distillation in the above-mentioned distiller is separated by using an ion-exchange fiber-based aqueous solution. A cleaning agent reclaiming device comprising: a soiling component separating means. 2. A cleaning device for cleaning an object to be cleaned, to which flux or the like has adhered, with a hydrocarbon-based cleaning agent, and the cleaning agent regenerating device according to claim 1 in combination, whereby the cleaning agent used in the cleaning device is predetermined. The cleaning agent is guided to the cleaning agent regenerating apparatus at a ratio of 5 to regenerate the cleaning agent, and the regenerated cleaning agent is circulated to the cleaning apparatus so that the cleanliness of the cleaning agent in the cleaning apparatus is maintained constant. A cleaning device system characterized by the above.