JPH0655150A - Washing unit and washing apparatus using the same - Google Patents

Abstract

(57) [Summary] [Purpose] To maintain a hydrocarbon-based cleaning agent in a state of having a predetermined cleaning effect and to perform continuous and stable cleaning without replacing the entire hydrocarbon-based cleaning agent. In addition to the above, a cleaning unit capable of constructing a cleaning system corresponding to various cleaning conditions and a cleaning apparatus using the cleaning unit are obtained. The cleaning unit of the present invention comprises a cleaning tank 1 for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent, and a hydrocarbon-based cleaning agent containing a low-boiling point stain component and a high-boiling point stain component to distill a low-boiling point First distiller 2 for separating dirt components by distillation
And a second distiller 3 for distilling and separating the hydrocarbon-based detergent by distilling and separating the low-boiling-point contaminants in the first distiller 2, and the second distiller 3. The hydrocarbon-based cleaning agent separated in the distiller 3 is circulated and supplied to the cleaning tank 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device used for cleaning various parts and products such as electronic parts and mechanical parts, and more specifically, it is used when cleaning is performed using a hydrocarbon-based cleaning agent. The present invention relates to a cleaning unit and a cleaning device using the cleaning unit.

[0002]

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

Therefore, a method using a CFC-based cleaning agent or a cleaning agent other than a chlorine-based solvent such as trichloroethane (for example, a hydrocarbon-based cleaning agent) has been proposed, but when the cleaning agent becomes dirty, cleaning is performed. Since the effect decreases, the cleaning agent in the cleaning device needs to be updated at a predetermined pitch, and the cleaning device must be stopped when the cleaning agent is replaced, which is a problem of inefficiency.

Further, for example, when the used cleaning agent extracted from the cleaning apparatus is regenerated by using a regenerating apparatus provided at another place and is returned to the cleaning apparatus for reuse, the used cleaning agent is extracted. However, there is a problem in that it is not only complicated, but also costs are increased, because steps such as transportation, and installation in a cleaning device are required.

On the other hand, it is not preferable to dispose of the contaminated cleaning liquid, not only in terms of cost but also in waste of resources.

The present invention solves the above-mentioned problems, and keeps the hydrocarbon-based cleaning agent in a clean state having a predetermined cleaning effect without replacing the entire hydrocarbon-based cleaning agent. An object of the present invention is to provide a cleaning unit capable of continuously and stably cleaning and constructing a cleaning system corresponding to various cleaning conditions, and a cleaning apparatus using the cleaning unit. And

[0007]

In order to achieve the above object, a cleaning unit of the present invention is a cleaning apparatus for cleaning an object to be cleaned using a hydrocarbon-based cleaning agent, and the object to be cleaned is hydrocarbon-based cleaning. A cleaning tank for cleaning with a cleaning agent, a first distiller for distilling and separating a low boiling point contaminant component by distilling a hydrocarbon cleaning agent containing a low boiling point contaminant component and a high boiling point contaminant component mixed in the cleaning step, In the first distiller, the hydrocarbon detergent containing the high-boiling-point stain component obtained by distilling off the low-boiling-point stain component is distilled, and the hydrocarbon-based detergent is distilled off.
And a hydrocarbon-based cleaning agent separated in the second distillation apparatus is circulated and supplied to the cleaning tank.

Further, the cleaning apparatus of the present invention is characterized in that the above-mentioned cleaning units are connected (arranged) in a plurality of stages in series and the objects to be cleaned are sequentially sent to the subsequent cleaning unit for multi-stage cleaning. .

Further, in the cleaning apparatus of the present invention, the above-mentioned cleaning apparatus is further provided with a dryer for cleaning the objects to be cleaned utilizing waste heat such as the first and second distillers of the cleaning units at each stage. It is characterized by having done.

[0010]

In the cleaning unit of the present invention, the object to be cleaned is cleaned with the hydrocarbon-based cleaning agent in the cleaning tank. On the other hand, the hydrocarbon-based cleaning agent in the cleaning tank is distilled in the first distiller, and the low boiling point contaminant component mixed in the cleaning step is separated (removed) by distillation. Further, the hydrocarbon-based cleaning agent (including the high-boiling-point contaminant component) from which the low-boiling-point contaminant component has been removed in the first distiller is distilled in the second distiller, and the hydrocarbon-based detergent is separated as a fraction. It is collected and circulated and supplied to the cleaning tank. The high boiling point pollutant remaining in the second distiller is discharged out of the system as needed.

Therefore, the low boiling point (dirt) component and the high boiling point (dirt) component in the hydrocarbon type cleaning agent are separated and removed in one cleaning unit, so that the dirty hydrocarbon type cleaning agent is removed from the system. It is no longer necessary to extract and regenerate the cleaning object, and the hydrocarbon cleaning agent in the cleaning tank can always be kept in a state of having a predetermined cleaning ability to reliably clean the object to be cleaned.

Further, in the cleaning apparatus of the present invention, the object to be cleaned is sequentially sent to the subsequent cleaning unit and cleaned at each stage (multi-stage cleaning). Therefore, for example, rough cleaning for removing terrible dirt, It becomes possible to clean the object to be cleaned in stages, such as medium cleaning and further fine cleaning for finishing. Therefore, it becomes possible to perform cleaning under conditions that match the condition of the object to be cleaned and the target degree of cleaning.
The cleaning efficiency can be improved.

Further, in the cleaning apparatus of the present invention,
Since the waste heat of the first and second distillers of the cleaning unit of each stage is used in the dryer for drying the object to be cleaned after cleaning, the amount of heat energy used in the drying process is reduced. As a result, it is possible to save energy in the cleaning device as a whole.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a cleaning unit according to an embodiment of the present invention.

The cleaning unit 20 of this embodiment comprises a cleaning tank 1 for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent, and a low boiling point contaminant component and a high boiling point contaminant component mixed from the object to be cleaned in the cleaning step. A first distiller 2 for distilling and separating a low boiling point soil component by distilling a hydrocarbon-based detergent containing
And a second distiller 3 for distilling and separating the low-boiling-point stain component in the distiller 2 and distilling the hydrocarbon-containing detergent containing the high-boiling-point stain component, and distilling and separating the hydrocarbon-based detergent. There is.

The cleaning tank 1 has an upper portion having a heating heater 4 for heating a hydrocarbon-based cleaning agent to a predetermined temperature, a temperature controller 11, an evaporated gas cooling coil 7, and a hydrocarbon-based cleaning agent partition plate 16. It is an open container, and can control the temperature of the hydrocarbon-based cleaning agent, cool the evaporated gas, and partition the hydrocarbon-based cleaning agent used for cleaning.

The first distiller 2 has a heating heater 5,
A sealed atmospheric pressure container having a temperature controller 12, a hydrocarbon-based detergent overflow plate 17, and a discharge pipe 31 for discharging high-boiling-point contaminants from the bottom. It is configured so as to receive the system cleaning agent to regulate the liquid level of the cleaning tank 1 and to distill and separate the low boiling point contaminant components mixed in in the cleaning step.

Further, the second distiller 3 has a heating heater 6, a temperature alarm controller 13, a liquid level alarm device 14, an evaporative gas cooling coil 8, a regenerant liquid circulation line 18, and a high boiling point contaminant component outside the system. A closed atmospheric pressure vessel equipped with a discharge pipe 32 for withdrawing, from a hydrocarbon-based detergent containing a high boiling point contaminant component overflowing from the first distiller 2 for separating low boiling point contaminant components,
The hydrocarbon-based cleaning agent is separated by distillation, and the condensate (regeneration liquid) is circulated and supplied to the cleaning tank 1 through the regeneration liquid circulation line 18, and the high-boiling point contaminants are collected at the bottom thereof, for example, a temperature alarm set value, Alternatively, at the liquid level alarm set value, the internal high boiling point contaminant component (including the contaminant liquid) is discharged to the outside of the system, or a new hydrocarbon type detergent is replenished from the hydrocarbon type detergent storage tank 10. Has been done.

Further, the vaporized gas above the cleaning tank 1, the vaporized gas above the first distiller 2 and the non-condensed gas above the second distiller 3 are discharged outside the system by an exhaust blower 9.

Further, the evaporated gas cooling coil 7 of the first distiller 2 and the evaporated gas cooling coil 8 of the second distiller 3 are
Cooling water is supplied. The supply of the cooling water is adjusted and supplied by the condensate temperature controller 15 so that the condensate has a predetermined temperature. Then, the cooling water (warm waste water) that has undergone heat exchange in the evaporated gas cooling coil 7 of the first distiller and the evaporative gas cooling coil 8 of the second distiller 3 is dried by a dryer (21) described later.
a, 21b), waste heat is recovered, and then drained.

Next, the operation of the cleaning unit configured as described above will be described.

First, a container 3 containing a material to be cleaned and made of a material through which a cleaning liquid such as a wire mesh or punching metal passes.
0 is immersed in the hydrocarbon-based cleaning agent in the cleaning tank 1 for cleaning. At this time, rock the container as necessary,
Apply ultrasonic vibration. In this cleaning step, the low boiling point stain component and the high boiling point stain component adhering to the object to be cleaned are transferred into the hydrocarbon-based cleaning agent. The hydrocarbon detergent mixed with the low-boiling point stain component and the high-boiling point stain component moves to the first distiller 2 and is heated by the warming heater 5 to separate the low-boiling point stain component by distillation. The evaporated low-boiling-point contaminants exchange heat with the cooling water passing through the evaporated gas cooling coil 7, and are then discharged from the exhaust blower 9 to the outside of the system.

The hydrocarbon cleaning agent (including the high boiling point contaminants) from which the low boiling point contaminants have been removed moves over the overflow plate 17 to the second distiller 3 and is heated by the heating heater 6. Thus, the hydrocarbon detergent is separated by distillation. Then, the separated hydrocarbon-based cleaning agent (regenerated liquid) is circulated and supplied to the cleaning tank 1 through the regenerated liquid circulation line 18. Further, the high-boiling-point contaminants accumulated at the bottom of the second distiller 3 are discharged from the discharge pipe 32 under a predetermined condition such as a temperature alarm set value.
Is discharged to the outside of the system. When the liquid level of the second distiller 3 becomes equal to or lower than the liquid level alarm set value, a new hydrocarbon-based cleaning agent is replenished from the hydrocarbon-based cleaning agent storage tank 10. In addition,
In FIG. 1, 33 is a vent line.

As described above, according to the cleaning unit 20 of this embodiment, a low boiling point (dirt) component and a high boiling point (dirt) in the hydrocarbon-based cleaning agent are contained in one cleaning unit.
Since the components are separated and removed, the hydrocarbon cleaning agent in the cleaning tank is always kept in a state with a predetermined cleaning ability without extracting the dirty hydrocarbon cleaning agent out of the system for regeneration. Thus, the object to be cleaned can be surely cleaned.

FIG. 2 is a diagram showing a cleaning apparatus according to an embodiment of the present invention, which is constructed by using the cleaning unit 20 described above. This cleaning device includes three cleaning units 2
0a, 20b, 20c and two dryers 21a, 21b
Is equipped with.

That is, in this cleaning apparatus, the first-stage cleaning unit 20a for rough cleaning, the second-stage cleaning unit 20b for intermediate cleaning, and the third-stage cleaning unit 20c for precise cleaning are connected in series. Connected (placed). Also,
The first-stage dryer 21a and the second-stage dryer 21b are also connected (arranged) in series.

The dryers 21a and 21b are provided with heating coils 22a and 22b and dry gas supply ports 23a and 2 respectively.
The cleaning unit 20 is an opener having 3b.
The object to be cleaned that has been sufficiently cleaned via a, 20b, and 20c is configured to be air-dried.

The dryers 21a and 21b are constructed so as to utilize the waste heat of the cleaning units 20a, 20b and 20c, and the evaporated gas cooling coil 7 of the first distiller 2 and the second distiller are used. The warm waste water discharged from the evaporative gas cooling coil 8 of No. 3 is heated by the heating coil 22 of the dryers 21a and 21b.
a, 22b to supply the cleaning unit 20
Waste heat of a, 20b, 20c is recovered in the dryers 21a, 21b.

In the drying step, first, the object to be cleaned after cleaning is put in the first-stage dryer 21a and heated to a predetermined temperature by the heating coil 22a, while the lower dry gas supply port 23a is provided. To provide drying gas (usually, but not limited to air). Further, the object to be cleaned is transferred to the second-stage dryer 21b, and is sufficiently dried by supplying the dry gas from the lower dry gas supply port 23b while being heated to a predetermined temperature by the heating coil 22b. . The object to be washed thus dried is collected as a part or a product and sent to the next step depending on its use.

In the above embodiment, the case where the cleaning units are connected in series (arranged) in three stages has been described.
The required cleaning efficiency can be obtained by connecting (arranging) two to six stages in series. However, there is no particular restriction on the number of connection (arrangement) stages, and it is possible to select an appropriate number of stages in consideration of the use of the object to be cleaned, the degree of contamination, the contents of subsequent processing steps, and other conditions.

In the above embodiment, the case where two dryers are connected (arranged) in series has been described, but normally, by connecting (arranging) 1 to 3 stages in series, the object to be cleaned can be sufficiently treated. Can be dried. However, the number of stages is not particularly limited, and more dryers can be arranged in series, and the dryers can be connected (arranged) in parallel.

There are no particular restrictions on the type of hydrocarbon-based cleaning agent used in the cleaning apparatus of the present invention, and various hydrocarbon-based cleaning agents can be used. Next, the results of a cleaning experiment conducted using the cleaning apparatus according to the above-mentioned example will be shown.

[Experimental Example 1] A precision part made of aluminum which has been press-worked has a length of 200 mm, a width of 150 mm and a height of 10.
It was filled in a 0 mm square cage and used as a hydrocarbon-based cleaner, Exxon Corp., ACTREL (registered trademark), and the results are shown in Table 1.
Washing was performed under the conditions shown in.

[0034]

[Table 1]

The degreasing rate of the cleaned precision parts is 99.99.
%Met.

[Experimental Example 2] A machined iron part was filled in a cylindrical cage having a diameter of 200 mm and a length of 150 mm, and Acton (registered trademark) manufactured by Exxon Co. was used as a hydrocarbon cleaning agent. Washing was performed under the conditions shown in 2.

[0037]

[Table 2]

The degreasing rate of the washed iron parts is 99.97.
%Met.

In the above embodiments, the case where the hydrocarbon-based cleaning agent is used as the cleaning agent has been described as an example. However, the cleaning unit of the present invention and the cleaning device using the cleaning unit are not limited to hydrocarbon-based cleaning. It can be applied to the case of using an organic or inorganic cleaning agent other than the cleaning agent, and in that case, the same effect as that of the above-described embodiment can be obtained.

[0040]

As described above, in the cleaning unit of the present invention, a cleaning tank for cleaning an object to be cleaned with a hydrocarbon-based cleaning agent and a hydrocarbon-based cleaning agent are distilled to separate low-boiling-point contaminants by distillation. A first distiller and a second distillation for distilling and separating the hydrocarbon detergent containing a high-boiling-point stain component obtained by distilling and separating the low-boiling-point stain component in the first distiller. Since the hydrocarbon-based cleaning agent separated in the second distiller is circulated and supplied to the cleaning tank, in one cleaning unit,
It is no longer necessary to separate and remove low-boiling point (dirt) components and high-boiling point (dirt) components in hydrocarbon-based cleaning agents and to remove dirty hydrocarbon-based cleaning agents from the system to regenerate them. It becomes possible to reliably clean the object to be cleaned by always keeping the hydrocarbon-based cleaning agent of (3) in a state having a predetermined cleaning ability.

Further, in the cleaning apparatus of the present invention, the cleaning units are connected (arranged) in a plurality of stages in series, and the cleaning target is subjected to multi-stage cleaning in the cleaning units of each stage. It becomes possible to perform cleaning under conditions that match the target cleaning efficiency and the cleaning effect can be improved.

Further, according to the cleaning apparatus, which uses the waste heat of the first and second distillers of the cleaning unit of each stage and has a dryer for drying the object to be cleaned after cleaning, It is possible to reduce the amount of heat energy used in the drying process and save energy in the cleaning device as a whole.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a schematic configuration of a cleaning apparatus according to an embodiment of the present invention.

[Explanation of symbols]

1 Cleaning Tank 2 First Distiller 3 Second Distiller 20 (20a, 20b, 20c) Cleaning Units 21a, 21b Dryer 30 Container for Accommodating Cleaning Object

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Saito 2-1, 2 Kisederajima, Amagasaki City, Hyogo Prefecture Kimura Kakoki Co., Ltd. (72) Koji Akita 2-1-2, Kisejijima, Amagasaki, Hyogo Kimura Kakoki Co., Ltd.

Claims (3)

[Claims] 1. A cleaning apparatus for cleaning an object to be cleaned using a hydrocarbon-based cleaning agent, a cleaning tank for cleaning the object to be cleaned with a hydrocarbon-based cleaning agent, and a low boiling point contaminant component and a high contaminant mixed in the cleaning step. A first distiller for distilling and separating a low boiling point stain component by distilling a hydrocarbon detergent containing a boiling point stain component, and a high boiling point stain component obtained by distilling and separating a low boiling point stain component in the first distiller. Distilling hydrocarbon cleaners,
A second distiller for distilling and separating a hydrocarbon-based cleaning agent is provided, and the hydrocarbon-based cleaning agent separated in the second distiller is circulated and supplied to the cleaning tank. Cleaning unit. 2. A cleaning apparatus, wherein the cleaning units according to claim 1 are connected (arranged) in series in a plurality of stages, and the objects to be cleaned are sequentially sent to a cleaning unit in a subsequent stage for multi-stage cleaning. 3. The cleaning apparatus according to claim 2, further comprising a dryer for cleaning the object to be cleaned using waste heat such as the first and second distillers of the cleaning units of each stage. And cleaning equipment.