JP2001113092A - Dry cleaning petroleum solvent reclaiming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry cleaning petroleum solvent reclaiming device capable of sufficiently reducing the quantity of industrial waste without using a cartridge type filter, reducing disposal cost and dissolving cost increase caused by the use of throwaway cartridge, by a large margin. SOLUTION: This dry cleaning petroleum solvent reclaiming device has a filter 20 receiving and filtering a solvent from the washing machine body 10 side; a vacuum heating distiller 30 for leading in filtered residue in the filter 20 together with the solvent and distilling it by vacuum heating; a heat exchanging liquefier 40 for liquefying the solvent gasified by the vacuum heating distiller 30: a conveying decompression pump 50 for evacuating the vacuum heating distiller 30, leading steam generated in the vacuum heating distiller 30, to the heat exchanging liquefier 40 and suction-conveying the liquefied solvent; a moisture separator 60 for separating and removing moisture from a reclaimed solvent and returning it to the washing machine body 10 side; and an air intake regulating means 35 for regulating the degree of vacuum of the vacuum heating distiller 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petroleum dry cleaning solvent regenerating apparatus for regenerating a dry cleaning solvent, particularly a petroleum dry cleaning solvent.

[0002]

2. Description of the Related Art Commercial cleaning machines are generally classified into two types, a laundry system and a dry cleaning system. Dry cleaning is divided into two systems, a system using a synthetic solvent and a system using a petroleum solvent. break up. When a synthetic solvent is used, there is no flammability and good detergency, but the synthetic solvent is expensive. Care must be taken because some of the synthetic solvents are toxic. On the other hand, when a petroleum-based solvent is used, the solvent is relatively inexpensive, but there is a risk of ignition. In the case of a cleaning device using the synthetic solvent, since the solvent is expensive, a washer,
It is often a relatively large-scale, comprehensive facility that incorporates a filter, a tank, a pump, a distiller, and the like into a single large unit. On the other hand, in the case of petroleum-based cleaning devices, a relatively small-sized device having a combination of a washer and a solvent tank and a cartridge-type filter is now mainstream, because the solvent is relatively inexpensive. However, in a petroleum-based cleaning device combining the above-mentioned cartridge type filter, dirt coming out of the object to be washed is continuously filtered, decolorized, deoxidized, etc. by a cartridge type filter, and when the filter effect is reduced, the cartridge is removed. Since the cartridge is configured to be replaced, there is a problem that the difference in the degree of solvent contamination and the difference in the degree of solvent oxidation become extremely large before and after replacement of the cartridge. If you frequently change cartridges to mitigate the problem,
There is a problem that the cost required for the cartridge is extremely high. Furthermore, since the cartridge type filter is disposable, it is necessary to dispose of the cartridge type filter itself with dirt and solvent, which increases the volume of waste and raises the problem of industrial waste. There was a bulky problem. In order to extend the life of the cartridge-type filter, a combination of a distiller and the like has been provided, but in any case, the combined distiller has a very small capacity and only extends the life of the filter. The auxiliary evaporator is only an auxiliary one, and the auxiliary evaporator is disposed in the middle of a solvent circulation path for a washing operation formed between the washer and the cartridge type filter, and removes solvent dirt during the washing operation. It was just something to remove with the filter.

Accordingly, the present applicant has filed a Japanese Patent Application No. 11-1087.
In No. 60, the problem in the conventional dry cleaning using a petroleum-based solvent is solved, and the amount of industrial waste can be sufficiently reduced without using a cartridge type filter, thereby reducing the disposal cost. In addition, the cost increase due to the use of the disposable cartridge can be largely eliminated, and the filter medium used for the filter can be recycled many times over a long period of time. A petroleum-based dry cleaning solvent regenerating apparatus that can perform stable cleaning in a good solvent state at all times. However, the regenerating apparatus for petroleum-based dry cleaning solvents according to Japanese Patent Application No. 11-108760 has a configuration in which the reduced pressure of the vacuum heating distillation apparatus and the transfer of the steam generated there are performed by one transfer / reducing pump. There has been a problem that it is difficult to balance the adjustment of the reduced pressure with the combined use of the reduced-pressure pump and the transfer capability. That is, if the pressure is reduced by the operation of the combined use vacuum pump, bumping occurs in the vacuum heating distillation apparatus, and the load applied to the combined use vacuum pump becomes large, causing noise, increasing power consumption, and reducing the pump life. Occurs. Further, if the capacity of the transfer and pressure reducing pump is reduced during the operation, there is a possibility that the transfer capacity may be reduced and a problem may occur such that it is impossible to cope with the amount of generated steam.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned problems in the conventional dry cleaning using a petroleum-based solvent, eliminates the use of a cartridge-type filter, thereby sufficiently reducing the amount of industrial waste. As a result, the cost of disposal can be reduced, the cost increase due to the use of disposable cartridges can be largely eliminated, and the filter medium used in the filter can be recycled many times over a long period of time. It is an object of the present invention to provide an apparatus for regenerating a petroleum-based dry cleaning solvent which can perform the cleaning sufficiently well and frequently, and can always stably perform cleaning in a good solvent state. In addition, when regenerating petroleum-based dry-cleaning solvents using a vacuum-heated evaporator and a concomitant vacuum pump, a good and smooth petroleum-based solvent can be obtained by balancing the degree of decompression and the conveyance capacity of the vacuum-heated evaporator. An object of the present invention is to provide a petroleum-based dry cleaning solvent regenerating apparatus capable of regenerating a dry cleaning solvent and preventing a noise and a shortened life or an increased running cost of a combined use vacuum pump.

[0005]

In order to achieve the above object, the present invention provides an apparatus for regenerating a petroleum-based dry-cleaning solvent in dry cleaning using a petroleum-based dry-cleaning solvent, wherein the apparatus is at least used. A vacuum heating evaporator for receiving the petroleum-based dry cleaning solvent; and a combined vacuum pump for drawing the vacuum heating evaporator to a reduced pressure state and sucking and conveying the vapor generated by the vacuum heating evaporator, The first feature is that the still is provided with air intake adjusting means for adjusting the degree of vacuum of the vacuum heating still. Further, the petroleum-based dry cleaning solvent regenerating apparatus of the present invention is the petroleum-based dry cleaning solvent regenerating apparatus in dry cleaning using a petroleum-based dry cleaning solvent, and receives the solvent sent from the washing machine main body side. A filter for filtering the solution, a filter residue accumulated in the filter during the solvent regeneration operation, and a vacuum heat distillation device for introducing and vacuum-distilling the residue together with the solvent; A heat exchange liquefier that introduces the solvent, heat exchanges and cools and liquefies the solvent, and pulls the vacuum heat distiller to a reduced pressure state and guides the vapor generated by the vacuum heat distiller to the heat exchange liquefier. A transfer / pressure reducing pump for sucking and transferring the liquefied solvent, a water separator for separating and removing water contained in the regenerated solvent and returning the water to the washing machine main body side; That it has an air intake adjusting means for adjusting the degree of vacuum heat distiller has a second feature. The petroleum-based dry cleaning solvent regeneration device of the present invention,
In addition to the second feature, the filter further comprises a tank for receiving at least the solvent, a number of filter cloth type disc filters mounted in alignment with a rotating shaft in the tank, and And a rotating shaft driving means for rotating and driving the filter cloth to remove the filter residue adhering to the filter cloth type disc filter. Further, the petroleum-based dry cleaning solvent regenerating apparatus of the present invention, in addition to the second or third feature,
On a single base, a filter, a vacuum heating evaporator, a heat exchange liquefier, a combined use vacuum pump, a water separator, and piping between them are arranged in a three-dimensional arrangement to form a unit. This is the fourth feature.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by describing embodiments of the present invention with reference to the drawings.
FIG. 1 is an overall piping configuration diagram illustrating an embodiment of a petroleum-based dry cleaning solvent regenerating apparatus according to the present invention, FIG. 2 is a detailed view of a filter, FIG. 3 is a front view showing a three-dimensional configuration of the apparatus,
FIG. 4 is a side view showing a three-dimensional configuration of the device.

In FIG. 1, the apparatus for regenerating a petroleum dry-cleaning solvent of the present invention is used in combination with a washing machine main body 10. The washing machine main body 10 is generally provided with a washer 11 for actually washing the laundry and a solvent tank 12 serving as a solvent base tank. A transport pump 13 for transporting the solvent from the solvent tank 12 is additionally provided. Of course, the washing machine main body 10 can be provided with other facilities. The apparatus for regenerating a petroleum dry-cleaning solvent according to the present invention includes a filter 20, a vacuum heating distillation unit 30, a heat exchange liquefier 40, a combined use vacuum pump 50, a moisture separator 60, and a group of pipes for connecting them and other components. Consists of instruments.

[0008] The washing machine body 10 side and the filter 20 are
The connection is made by a reciprocating path 70 including an outward path 71 and a return path 72. Specifically, the outward path 71 from the solvent tank 12 of the washing machine body 10 is connected to the filter 20 via the transport pump 13, while the return path 72 from the filter 20 is connected to the washer 11.
To the solvent tank 12. Return 72
Some of them can be directly carried into the solvent tank 12 by switching with the valves 72a and 72b. By piping as described above, during the washing operation, by driving the transport pump 13, the solvent in the solvent tank 12 enters the filter 20 through the outward path 71, where the solvent is filtered and washed, and the cleaned solvent is obtained. Is supplied to the washer 11 through the return path 72 and is subjected to cleaning of the laundry, and thereafter returns to the solvent tank 12.

From the filter 20, a pipe 81 for solvent regeneration is connected to the vacuum heating distillation unit 30 via an on-off valve 82. In addition, the condenser 31 from the vacuum heating still 30
Are connected to the heat exchange liquefier 40. From the heat exchange liquefier 40, a pipe 83 is connected via a check valve 84 to the transfer / pressure reducing pump 50, and from the transfer / pressure reducing pump 50, a pipe 85 is connected to the moisture separator 60. A bypass 86 is provided in the middle of the pipe 83 to directly connect to the water separator 60 bypassing the transfer / reducing pump 50, and a control valve 87 for adjusting the flow rate is provided in the middle of the bypass 86. Is provided. The water separator 6
From 0, a pipe 88 is connected to the solvent tank 12.

During the washing operation, the filtration residue gradually accumulates in the filter 20 and the solvent condition gradually deteriorates. However, the washing operation is performed at appropriate intervals, for example, once a day. Regeneration of the solvent is performed by performing a regeneration operation when not performed. The state of dirt of the solvent can be determined, for example, by the state of oxidation of the solvent, and it is preferable that the washing is performed when the numerical value representing the state of oxidation is 0.3 or less.
In the case of the cartridge filter described in the above conventional example, the numerical value is 0.2 to 0.8 before and after the replacement of the cartridge.
And if it is constantly used below 0.3, the cartridge must be replaced very frequently. The regeneration operation of the solvent by the apparatus of the present invention
First, the on-off valve 82 is opened, and the filtration residue accumulated in the filter 20 is led into the vacuum heating still 30 together with the remaining solvent. Then, the vacuum heating distillation unit 30 is heated while the vacuum heating distillation unit 30 is depressurized by operating the transport / compression pump 50. As a result, the solvent in the vacuum heating distillation unit 30 evaporates and evaporates, and is drawn by the conveyer / reducing vacuum pump 50 and guided from the condensing tower 31 to the heat exchange liquefier 40. The solvent containing the filtration residue is vaporized and evaporated in the vacuum heating evaporator 30 to be regenerated as a solvent from which mixed or dissolved impurities have been sufficiently removed. Since this regeneration is performed by distillation, it is possible to reliably remove fine contaminants and dissolved substances that cannot be removed by simple filtration or other filters, thereby obtaining a solvent having a very high degree of regeneration. On the other hand, the vacuum heating still 30
The filtration residue remaining without being vaporized is discharged after a regeneration operation or the like.

The regenerated solvent conveyed to the heat exchange liquefier 40 is sufficiently liquefied and cooled there, and is further sucked and conveyed as a liquid by the concomitant vacuum pump 50 to be introduced into the water separator 60. In the water separator 60, water contained in the regenerated solvent is removed. Then, the regenerated solvent from which water has been removed is returned to the solvent tank 12.

Referring to FIG. 2 as well, the filter 20 includes a tank 21 for receiving a solvent, a rotating shaft 22 provided through the center of the tank 21, and a liner aligned with the rotating shaft 22. The filter disc 23 is rotated by rotating the rotating shaft 22 as necessary, and the filter disc 23 is rotated, whereby the filter attached to the filter disc 23 is filtered. Rotation driving means for removing the residue. The rotation driving means includes a motor 24, a pulley 2
5, 25, a transmission belt 26, bearings 27, 27 and the like.

The filter cloth type disc filter 23 is, for example, a disc to which a filter cloth made of nylon is attached, and a large number of discs are arranged to increase the filtration area. The mesh of the filter cloth type disc filter 23 can be, for example, about 30 microns. The filtration by the filter 20 is performed by passing the solvent in the tank 21 from the outside to the inside through the filter disc 23, so that the filtration residue adheres to the outer surface of the filter disc 23. Will be. Therefore, in the case of regenerating the solvent, before the filtration residue in the filter 20 is discharged to the vacuum heating distiller 30, the motor 24 of the filter 20 is first driven to drive the filter cloth type disc filter 23. Is rotated, whereby the operation of peeling off the filter residue adhering to the filter cloth type disc filter 23 and shaking it off into the residual solvent is performed manually or automatically. Then, after the work is completed, the on-off valve 82 of the pipe 81 to the vacuum heating distiller 30 is opened,
The residual solvent in the filter 20 is automatically or manually discharged to the vacuum heating still 30 together with the filtration residue.
Of course, the regeneration of the solvent is carried out by introducing the solvent in the solvent tank 12 from the outward path 71 by the transport pump 12 into the filter 20 once or not through the pipe 81 without using the solvent.
It can also be introduced to 0 and performed. The filter 20 is operated manually or automatically to remove the filter residue adhering to the filter cloth type disc filter 23 and shake it into the residual solvent. Can also be played and used. For example, it can be used for a long time until the filter capacity of a nylon filter cloth is lost.

Referring to FIG. 3, a heating jacket 32 is attached to the outside of the lower half of the vacuum heating distiller 30, so that high-temperature steam from a heating steam supply source (not shown) is supplied to the heating jacket 32. The vacuum heating distillation unit 30 is heated by introducing into the inside, whereby the solvent inside is vaporized and evaporated. The vacuum heating still 3
Although the heating by 0 is performed using steam, the heating by the steam does not reach the boiling point of the petroleum solvent under a normal pressure of 1 atm. By reducing the pressure inside 30, the boiling point of the petroleum-based solvent is lowered to promote vaporization. The pressure reduced by the transfer / compression pump 50 is such that the suction by the transfer / compression pump 50 is performed by the heat exchange liquefier 40 and the condensing tower 31.
The gas solvent generated by vaporizing and evaporating in the vacuum heating still 30 is drawn into the heat exchange liquefier 40 through the condensing tower 31. It is carried.

The heat exchange liquefier 40 functions to liquefy the vaporized solvent being conveyed and further reduce the temperature. A configuration is such that water from a water source (not shown) passes upward from below the cylindrical body, and that a solvent enters from above the cylindrical body and is guided downward, whereby the solvent is cooled by heat exchange. It is configured as follows.

The transfer and pressure reducing pump 50 can be constituted by a gear pump such as an internal gear pump which rotates by meshing an external gear and an internal gear housed inside thereof. In the initial stage of the operation by the vacuum heating still 30, the vacuum pump is used as a vacuum pump for reducing the atmosphere in the vacuum heating still 30, and the vaporization and evaporation of the solvent in the vacuum heating still 30 become active. And the generated gaseous solvent is sucked through the condensing tower 31 and led to the heat exchange liquefier 40, and the heat exchange liquefier 40
Plays a role of a transport pump for transporting the regenerated solvent of the liquid generated in the above to the solvent tank 12 via the moisture separator 60.

Incidentally, with respect to the vacuum heating distillation apparatus 30 which is depressurized by the above-mentioned conveyer and decompression pump 50, the petroleum-based dry cleaning solvent contains water,
Since a large amount of dirt and the like from the object to be washed such as soap (surfactant) and fatty acid may be contained, bumping may occur in the vacuum heating still 30 during vacuum distillation.
If bumping occurs, the solvent to be distilled may enter the downstream side of the vacuum heating distiller 30 without being sufficiently distilled and vaporized, thereby causing distillation failure. The reason why the pressure is reduced to distill the solvent in the first place is that the petroleum-based dry cleaning solvent has a boiling point of about 180 ° C. at 1 atm. Therefore, when the solvent is distilled in a vessel heated to about 120 ° C. by steam. It is necessary to depressurize the inside of the container (that is, the vacuum heating evaporator 30). However, if the depressurization is too high, the boiling point is lowered more than necessary, resulting in a bumping phenomenon. Further, when the pressure is reduced so as to cause the bumping phenomenon, the load applied to the transfer / compression pump 50, which also serves as the transfer pump, becomes large, which causes a problem that the transfer / compression pump 50 emits noise. Further, in the state where the bumping phenomenon occurs, the generation of steam in the vacuum heating distillation unit 30 becomes excessive, so that the cooling liquefaction capacity in the heat exchange liquefaction unit 40 needs to be increased more than necessary. There is a problem that the equipment becomes complicated and large-scale.
Therefore, in the present invention, the bumping phenomenon in the vacuum heating distillation apparatus 30 is eliminated, and an excessive load in the transfer / compression pump 50,
The reduction of the life and the increase in the amount of electricity used are eliminated, and the noise of the pump 50 due to the increase in the load of the transfer and pressure reducing pump 50 and the large amount of vaporized vapor is prevented. In order to prevent complication and increase in scale, the vacuum heating still 3 is connected to the vacuum heating still 30.
An air intake adjusting valve 35 is provided as an air intake adjusting means for adjusting the degree of vacuum in zero.

The air inflow control valve 35 is provided with a decompression meter 3 described later.
The degree of opening may be automatically adjusted in accordance with the degree of vacuum detected by the sensor 4, so that the degree of vacuum falls within a certain range. Further, a configuration may be adopted in which a fixed amount of air continuously or automatically flows into the vacuum heating distiller 30 when the degree of vacuum reaches a certain value. In addition, the capacity of the vacuum heating evaporator 30, the operating capacity of the combined use vacuum pump 50, the air intake control valve 35
By obtaining data of the time-dependent depressurization state in the vacuum heating distillation apparatus 30 due to the opening degree of the air, the air intake adjustment is performed so that the degree of vacuum in the vacuum heating distillation apparatus 30 becomes a value corresponding to the apparatus. The valve 35 can be adjusted automatically or manually. The degree of vacuum in the vacuum heating evaporator 30 is, for example, about -0.08 MPa when one atmosphere is 0 MPa (megapascal) and a high vacuum state close to vacuum is -0.1 MPa with respect to the 0 MPa. For example, -0.07 ~-
0.09 MPa). Thereby, bumping can be prevented. As described above, by providing the air intake control valve 35 in the vacuum heating still 30, during the regeneration operation of the solvent, the transfer and pressure reducing pump 50 can be operated in a stable state, and thus the transfer amount can be stabilized. While ensuring stable solvent regeneration, ensure a stable degree of vacuum in the vacuum heating evaporator 30 to prevent bumping and prevent overload applied to the transfer / reducing pump 50 (for example, by setting the air intake control valve 35). If the load is not provided, the load reaches 3.4 kg / cm ² , but it can be reduced to 1 kg / cm ² or less by providing the valve 35.) In addition, the amount of electricity used can be saved (for example, when the air intake control valve 35 is not provided, the use current reaches 1.4 A, but by providing the valve 35, the current can be reduced to 0.9 A) and noise is reduced. Generation can be suppressed. Further, the amount of steam generated in the vacuum heating still 30 is prevented from becoming excessive,
There is no need to make the structure of the heat exchange liquefier 40 complicated and large.

The water separator 60 serves to remove water contained in the regenerated solvent, and is formed by filling a cylindrical body with a hygroscopic material.

Referring to FIG. 3 and FIG. 4, the solvent regenerating apparatus of the present invention is configured as a unit which is arranged on one base 90 and arranged three-dimensionally. That is, one base 9
0, a vacuum heating pump 30 is provided alongside the vacuum heating distillation apparatus 30.
The cylindrical main body is also installed upright on the base 90.
Further, the filter 20 is supported on the vacuum heating still 30. Therefore, the vacuum heating distiller 30 and the filter 20 have a space-saving three-dimensional arrangement, and during the solvent regeneration operation, the solvent in the filter 20 is smoothly and naturally dropped into the vacuum heating distiller 30 via the pipe 81. Can be inserted. The heat exchange liquefier 40 is also supported three-dimensionally with the condensing tower 31 and the pipe 83 of the vacuum heating distiller 30 in a form that achieves space saving by being supported in the air with its tubular body in the vertical direction. I have. 3 and 4, reference numeral 28 denotes a pressure gauge for detecting the pressure in the filter 20, and reference numeral 33 denotes a vacuum heating distiller 30.
This is a discharge port for discharging the distillation residue remaining in the container. Reference numeral 34 denotes a pressure reducing gauge, and reference numeral 91 denotes a control panel.

The use of the apparatus for regenerating the dry cleaning solvent of the present invention shown in the above embodiment can reduce the amount of waste to about one tenth as compared with a conventional apparatus using a cartridge filter. For a standard model using a cartridge filter, the cost of purchasing a cartridge filter and the cost of industrial waste are ¥ 600,000 to ¥ 800,000 per year when the washing weight per operation is about 22 kg. it can. When the solvent is regenerated once a day, for example, using the dry cleaning solvent regenerating apparatus of the present invention described in the above embodiment, the oxidation state value representing the degree of solvent contamination is always 0.05 to 0.05.
A range of 0.015 (a preferred range is 0.3 or less).
In the case of a cartridge filter, it is about 0.2 at the start of use, but the value quickly deteriorates. ) Can be washed.

[0022]

According to the first aspect of the present invention, there is provided an apparatus for regenerating a petroleum-based dry cleaning solvent in dry cleaning using a petroleum-based dry cleaning solvent. A vacuum heating evaporator for receiving at least used petroleum-based dry cleaning solvent, and a transfer / compression pump for pulling the vacuum heating evaporator to a reduced pressure state and sucking and conveying steam generated by the vacuum heating evaporator. Since the vacuum heating distillation apparatus is provided with air intake adjusting means for adjusting the degree of vacuum of the vacuum heating distillation apparatus, the vacuum heating distillation apparatus can be reduced in pressure and the vapor generated by the vacuum heating distillation apparatus can be transported. It can be carried out by one transfer / compression pump, and by continuing the operation of the transfer / compression pump, the degree of vacuum of the vacuum heating distillation apparatus can be reduced by petroleum dry cleaning. Even if the vacuum exceeds the level suitable for distillation of the cleaning solvent, the air can be properly adjusted by the air intake adjusting means without stopping the operation of the transfer / pressure reducing pump. The above situation can be avoided. In other words, it is possible to stably maintain the degree of vacuum of the vacuum heating distillation apparatus in a predetermined range while transporting the steam generated by driving the transport / reducing pump in a stable state. Therefore, the bumping phenomenon in the vacuum heating evaporator can be sufficiently effectively prevented to ensure good vacuum distillation, and an excessive load applied to the transfer / reducing pump is prevented,
Further, noise can be prevented by the combined use of the transfer and pressure reducing pump, and the life of the transfer and use reduced pressure pump can be increased and the amount of electricity used can be reduced. Further, according to the apparatus according to claim 2, the apparatus for regenerating the petroleum-based dry cleaning solvent in dry cleaning using a petroleum-based dry cleaning solvent, wherein the apparatus receives a solvent sent from the washing machine body side and receives the solvent. And a vacuum heat distillation apparatus for introducing the filtration residue accumulated in the filter during the solvent regeneration operation together with the solvent and vacuum-distilling the same, and
A heat exchange liquefier for introducing and evaporating the solvent vaporized by the vacuum heating distiller and heat-exchanging and cooling the liquefied solvent; and drawing the vacuum heating distiller to a reduced pressure state and generating the vapor generated by the vacuum heating distiller. A transfer / reducing pump that guides the heat exchange liquefier and suctions and conveys the liquefied solvent, a water separator that separates and removes the water contained in the regenerated solvent and returns it to the washing machine body side, Since it has air intake adjusting means for adjusting the degree of vacuum, it is possible to remove dirt of petroleum-based solvents generated by the washing operation, particularly dirt accumulated in the filter, together with the solvent, a vacuum heating still, a heat exchange liquefier , Can be sufficiently regenerated and returned by being received in a solvent regenerating path composed of a transport / reducing vacuum pump and a water separator.
In addition, since the regeneration of the contaminated solvent is performed by a vacuum heating evaporator combined with a vacuum pump, even a petroleum-based solvent can be sufficiently vaporized and evaporated to be regenerated by distillation. Can be achieved. In addition, due to the presence of the vacuum pump for transfer, the role of decompression of the vacuum heating distillation apparatus, the role of introducing the vaporized solvent generated there into the heat exchange liquefier side, and the renewal of the regenerated solvent liquefied by the heat exchange liquefier. All the functions of the transfer can be performed by one pump, and the apparatus can be made very compact. Further, the presence of the air intake adjusting means for adjusting the degree of vacuum of the vacuum heating distillation apparatus stably maintains the vacuum degree of the vacuum heating distillation apparatus within a predetermined range while driving the vacuum pump which is also used for conveyance in a stable state. It is possible to sufficiently prevent bumping in the vacuum heating still, prevent excessive load on the decompression pump, prevent noise, increase service life, and reduce electricity consumption. And the liquefaction of heat exchange can be simplified. From the above, it is possible to eliminate the high cost by using the cartridge type filter, and to sufficiently reduce the amount of industrial waste and the disposal cost. The solvent can be used stably. According to the petroleum-based dry cleaning solvent regenerating apparatus of the third aspect, in addition to the effect of the configuration of the second aspect, the filter further comprises: a tank for receiving at least the solvent;
A number of filter cloth type disc filters which are mounted in alignment with the rotation axis in the tank, and the rotation axis is rotated as required to remove the filter residue adhering to the filter cloth type disc filter. By rotating the filter cloth type disc filter by the rotating shaft driving means, it is possible to easily and satisfactorily remove the filtration residue attached to the filter cloth, In addition, the dropped filtration residue is discharged to the regeneration path together with the residual solvent in the filter, so that the filtration capacity of the filter can be regenerated and restored many times. Therefore, the filter can be used for a long time with good and stable capacity and at low maintenance cost, and the maintenance cost of the entire regenerator can be sufficiently reduced. According to the apparatus for regenerating a petroleum-based dry cleaning solvent according to claim 4, in addition to the effects of the configuration according to claim 2 or 3, a filter, a vacuum heat distillation apparatus and a filter are provided on one base. Since the heat exchange liquefier, the transfer / reducing vacuum pump, the water separator, and the piping between them are three-dimensionally arranged and unitized, the entire apparatus can be made very compact and space-saving. It can be easily combined with the existing washing machine body.

[Brief description of the drawings]

FIG. 1 is an overall piping configuration diagram illustrating an embodiment of a petroleum-based dry cleaning solvent regenerating apparatus according to the present invention.

FIG. 2 is a detailed view of a filter.

FIG. 3 is a front view showing a three-dimensional configuration of the device.

FIG. 4 is a side view showing a three-dimensional configuration of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Washing machine main body 11 Washer 12 Solvent tank 13 Transport tank 20 Filtration device 21 Tank 22 Rotating shaft 23 Filter cloth disc filter 24 Motor 30 Vacuum heating distiller 31 Condenser tower 35 Air intake control valve 40 Heat exchange liquefier 50 Transport decompression decompression Pump 60 Moisture separator 70 Reciprocating path 71 Outbound path 72 Return path 90 Base

Claims (4)

[Claims] An apparatus for regenerating a petroleum-based dry cleaning solvent in dry cleaning using a petroleum-based dry-cleaning solvent, wherein the vacuum-heated distillation apparatus receives at least used petroleum-based dry-cleaning solvent; A vacuum pump that pulls the vessel to a reduced pressure state and sucks and transports the vapor generated by the vacuum heated distillation apparatus.The vacuum heated distillation apparatus has a vacuum for adjusting the degree of vacuum of the vacuum heated distillation apparatus. An apparatus for regenerating a petroleum-based dry cleaning solvent, comprising an air intake adjusting means. 2. A regenerating apparatus for a petroleum-based dry cleaning solvent in a dry cleaning using a petroleum-based dry cleaning solvent, wherein the filter receives a solvent sent from a washing machine main body side and filters the solvent. At the time of the solvent regeneration operation, the filtration residue accumulated in the filter is introduced together with the solvent, and the vacuum residue is distilled under vacuum, and the solvent vaporized by the vacuum distillation is introduced and heated. A heat-exchange liquefier that exchanges and cools and liquefies, and is also used as a transporter that pulls the vacuum-heated distiller to a reduced pressure state, guides the vapor generated by the vacuum-heated distiller to the heat-exchange liquefier, and further sucks and conveys the liquefied solvent. A pressure reducing pump, a water separator for separating and removing water contained in the regenerated solvent and returning it to the washing machine main body side, and an air intake for adjusting the degree of vacuum of the vacuum heating still. An apparatus for regenerating a petroleum-based dry-cleaning solvent, comprising: an inlet adjusting means. 3. A filter, comprising: a tank for receiving at least a solvent; a number of filter cloth type disc filters mounted in alignment with a rotary shaft in the tank; and a rotary drive for rotating the rotary shaft as required. 3. The apparatus for regenerating a petroleum-based dry cleaning solvent according to claim 2, further comprising: a rotating shaft driving means for dropping a filtration residue attached to the filter cloth type disc filter. 4. A unit in which a filter, a vacuum heat evaporator, a heat exchange liquefier, a combined use vacuum pump, a water separator, and a pipe between them are three-dimensionally arranged on one base. The petroleum dry cleaning solvent regenerating apparatus according to claim 2 or 3, wherein the petroleum dry cleaning solvent is recycled.