JP2009172468A - Regeneration apparatus of cleaning solvent, and distilling regeneration method of cleaning solvent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regeneration apparatus of a cleaning solvent capable of taking out the regenerated cleaning solvent containing little moisture without reheating only by heating once in a still for gasification, and a distilling regeneration method of the cleaning solvent. <P>SOLUTION: The regeneration apparatus of cleaning a solvent includes the still 2, a first gas cooler 21, a second gas cooler 23, an ejector 52, and a sludge tank 35. A cooling tube 24 is provided in the first gas cooler as a first cooling means, a cooling tube 39 is provided in the second gas cooler as a second cooling means. The first cooling means is set to cool the inside of the cooler to the temperature higher than the boiling point of water and allowing liquefaction of the cleaning solvent, and the second cooling means is set to cool the inside of the cooler to the temperature allowing condensation of steam. Gas fed from the still is passed through from the first gas cooler to the second gas cooler to liquefy the cleaning solvent gas in the gas in the first gas cooler, and the remaining gas is fed to the second gas cooler to liquefy remaining component like steam. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a cleaning solvent that regenerates a cleaning solvent containing dirt such as fats, fluxes and waxes by vacuum distillation by washing electronic parts, precision machine parts, etc., and in particular, both water-soluble dirt and oily dirt are washed. The present invention relates to a cleaning solvent regenerating apparatus suitable for a solvent that can be used, and a distillation regenerating method.

As is well known, the use of solvents such as chlorofluorocarbons is restricted from the standpoint of preventing environmental pollution, and petroleum solvents are used as this alternative solvent.
When electronic parts are cleaned using these petroleum-based solvents, oil-based processing oil such as cutting oil, flux, dust, etc. adhering to the parts to be cleaned are mixed into the cleaning liquid, and the cleaning device It cannot be removed simply by passing through the filter provided in. In addition, petroleum-based solvents are expensive solvents, and it is desirable that they can be reused from the viewpoint of resource saving.

For this reason, an apparatus for regenerating used cleaning solvent with a petroleum solvent regenerator has been developed.
This regenerator comprises a distillation kettle that evaporates used solvent under reduced pressure, a cooler connected in communication with the upper part of the distillation kettle, and a vacuum generator connected in communication with the distillation kettle. The solvent gas is cooled with a cooler and liquefied to recover it as a regenerated solvent. On the other hand, the waste liquid consisting of dirt such as oil and fat remains in the distillation pot, and the waste liquid is once cooled and discharged. It is comprised so that it may do. A cooling water pipe is connected to each of the cooler for cooling the solvent gas and the cooler for cooling the waste liquid, and the cleaning solvent gas and the waste liquid are cooled by the cooling water supplied from the cooling water pipe. (Patent Document 1).
JP-A-8-215501

However, in the conventional regeneration apparatus described above, moisture is mixed in the coagulation liquid taken out as the regeneration solvent, and even if it is attempted to remove this moisture through the moisture removal apparatus, it is difficult to achieve a sufficient removal rate. This was particularly noticeable when a solvent capable of washing both water-soluble soil and oil-based soil was regenerated. In order to increase the certainty of moisture removal, a moisture adsorbent is used, or only the moisture is evaporated by adjusting the degree of vacuum or heating temperature in the distillation kettle, and the remaining solvent is reused as a regenerating solvent. There was no other way.
However, using a moisture adsorbent is not practical because of high running costs, and the method of separating by distillation requires heating the entire coagulation liquid in order to remove a small amount of moisture. Further, the regenerated solvent cannot be taken out continuously, and is too costly to be practical.
Furthermore, when there is dirt having a boiling point higher than that of the cleaning solvent, re-distillation is necessary to remove the substance, and it cannot be practically used at all.

  The present invention has been proposed in view of the above, and its purpose is to clean the regenerated cleaning solvent with a low moisture content by heating it once in a still and gasifying it without reheating. It is an object of the present invention to provide a solvent regeneration apparatus and a cleaning solvent distillation regeneration method.

What is described in claim 1 is a distillation kettle for heating the used cleaning solvent, a first gas cooler connected in communication with the distillation kettle, a second gas cooler connected in communication with the first gas cooler, A pressure reducing device connected to the distillation kettle, and a waste liquid tank provided below the distillation kettle,
The first gas cooler is provided with a first cooling means for cooling the inside, and the second gas cooler is provided with a second cooling means for cooling the inside,
The first cooling means cools the inside of the cooler to a temperature higher than the boiling point of water and capable of liquefying the cleaning solvent, and the second cooling means is cooled to a temperature capable of liquefying water vapor. Is set to cool,
The gas sent from the still is passed in the order of the first gas cooler to the second gas cooler, the cleaning solvent gas in the gas is liquefied by the first gas cooler, and the remaining gas is cooled by the second gas This is a cleaning solvent reclaiming device that is sent to a vessel to liquefy the remaining components such as water vapor.

  According to a second aspect of the present invention, the first gas cooler includes a cooling pipe as the first cooling means disposed inside the cooling body, and the temperature of the refrigerant is set in the middle of the pipe that supplies the refrigerant to the cooling pipe. 2. The cleaning solvent regeneration device according to claim 1, further comprising a refrigerant temperature controller for management.

  According to a third aspect of the present invention, the first gas cooler includes a jacket on the outer wall of the cooling body, and the refrigerant passing through the first cooling means is passed through the jacket. This is a cleaning solvent recycling apparatus.

According to the fourth aspect of the present invention, the used cleaning solvent is heated and gasified in the distillation kettle under a reduced pressure lower than the atmospheric pressure, and this gas passes through the first gas cooler connected to the distillation kettle. And then introduced sequentially into the second gas cooler,
In the first gas cooler, the cleaning solvent gas in the gas is liquefied by cooling to a temperature higher than the boiling point of water and a temperature at which the cleaning solvent can be liquefied,
In the first gas cooler, the gas remaining without being liquefied is sent to the second gas cooler to liquefy the remaining components such as water vapor in the second gas cooler,
A condensate liquefied by a first gas cooler is taken out as a regenerated cleaning solvent.

  According to the invention of claim 1, the first cooling means of the first gas cooler cools the interior of the cooler to a temperature higher than the boiling point of water and capable of liquefying the cleaning solvent, and the second gas The second cooling means of the cooler is set so as to cool the inside of the cooler to a temperature at which water vapor can be liquefied, so that the gas sent from the distillation kettle is sent from the first gas cooler to the second gas cooler. The cleaning solvent gas in the gas can be liquefied by the first gas cooler, and the remaining gas can be sent to the second gas cooler to liquefy the remaining components such as water vapor. The condensate liquefied in the vessel can be taken out as a regeneration solvent. Therefore, this recycled solvent has a very low moisture content and can be recovered as a good quality cleaning solvent.

  According to the invention of claim 2, the first gas cooler is provided with a cooling pipe as the first cooling means disposed inside the cooling body, and the temperature of the refrigerant is managed in the middle of the pipe supplying the refrigerant to the cooling pipe. The temperature control in the first gas cooler can be managed at a predetermined temperature, thereby reliably liquefy the object to be condensed and liquefied in the first gas cooler. Can do. Therefore, the quality of the recycled solvent can be improved.

  According to the invention of claim 3, since the first gas cooler is provided with a jacket on the outer wall of the cooling body and the refrigerant passing through the first cooling means is passed through the jacket, the temperature distribution over the entire first gas cooler. Can be reduced, and the low temperature portion can be eliminated. Therefore, the disadvantage that the water vapor to be sent to the second gas cooler is liquefied can be solved. For this reason, the quality of the reproduction | regeneration solvent condensed and liquefied with the 1st gas cooler can be improved reliably.

  According to invention of Claim 4, it heats and gasifies in a pressure-reduced state, this gas is sequentially introduced into the second gas cooler after passing through the first gas cooler connected to the distillation kettle, In the first gas cooler, the cleaning solvent gas in the gas is liquefied by cooling to a temperature higher than the boiling point of water and capable of liquefying the cleaning solvent, and remains in the first gas cooler without being liquefied. Since the remaining gas such as water vapor is liquefied in the second gas cooler and the condensate liquefied in the first gas cooler is taken out as a regenerated cleaning solvent in the second gas cooler, the moisture content is low. A high quality recycled solvent can be taken out.

The best mode for carrying out the invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a cleaning solvent regenerator 1 according to the present invention.

In FIG. 1, reference numeral 2 denotes a substantially cylindrical distillation kettle having pressure resistance, and a heating device for heating a petroleum solvent (solvent to be distilled) supplied into the distillation kettle 2 is provided at the lower part of the distillation kettle 2. It is provided. As the cleaning solvent, a solvent capable of cleaning both water-soluble dirt and oily dirt, specifically, a non-aqueous detergent mainly composed of alcoholic hydrocarbons, alcohol based on hydrocarbons. Non-aqueous detergents added may be mentioned, but the invention is not limited thereto.
The heating device is provided with a jacket-like heating tank 3 so as to cover the outer bottom of the kettle body of the distillation kettle 2, and an oil heater 4 is provided in the heating tank 3 to heat the lower part inside the kettle body 2 ′. A coil 5 is arranged, a discharge side pipe 7 of the oil circulation pump 6 is connected to the lower end inlet side of the heating coil 5, and a return pipe 8 connected to the lower part of the heating tank 3 is connected to the outlet side of the heating coil 5. Connected. The heating coil 5 described above is provided at a position below the level of the cleaning solvent so as to be always immersed in the solvent to be distilled (used cleaning solvent) supplied into the distillation still 2. The heating tank 3 is arranged so that the uppermost part is located below the liquid level of the petroleum solvent supplied into the distillation still 2.

The heating coil 5 and the heating tank 3 are supplied with flame retardant medium oil as a heating medium. This medium oil is first heated by an oil heater 4 provided in the heating tank 3 to heat the lower half portion of the pot body 2 'from the outside, and the operation of the oil circulation pump 6 causes the inside of the distillation pot 2 from the bottom. The solvent to be distilled in contact with the heating coil 5 is heated, and then guided to the outside of the distillation pot 2 and then returned to the heating tank 3 via the return pipe 8. Returned from the bottom. Further, the medium oil heated in the heating tank 3 is supplied to the heating unit 11 of the cooling medium temperature adjuster 10 by the operation of the oil circulation pump 6, and after heating the cooling medium, exits the cooling medium temperature adjuster 10. Returned to the heating tank 3.
The medium oil is maintained at a predetermined temperature by an oil temperature controller 12 provided in the heating tank 3. Specifically, the oil temperature controller may be configured by a temperature adjusting thermostat, and the oil heater 4 may be turned on and off by the temperature adjusting thermostat to perform temperature management. Alternatively, the oil temperature regulator is constituted by a temperature sensor, and a control device (not shown) receives a signal from the temperature sensor, and the control device controls the oil heater 4 based on this signal, thereby managing the temperature. It may be configured to do. In short, it is only necessary that the heating medium oil in the heating tank 3 can maintain a predetermined temperature.

  In addition, in the distillation pot 2, the solvent to be distilled supplied from the outside of the regenerator 1 to the solvent inlet 9 is a solvent strainer 13, a solvent supply pipe 14, a liquid level adjuster 15, a solvent injection valve. It is supplied without excess or deficiency under the control of the control device via the solvent to be distilled supply system composed of 16 or the like.

  An exhaust port for discharging the gas distilled under reduced pressure is provided in the upper portion of the distillation kettle 2 described above, and the gas is sent from the solvent exhaust port through the gas pipe 20 to the first gas cooler 21 to be condensed and liquefied. Thus, the gas such as water vapor not condensed by the first gas cooler 21 is connected to the downstream side through the gas pipe 22 from the upper part of the first gas cooler 21 (in this embodiment, the gas outlet provided on the ceiling). It is sent to the second gas cooler 23 and is condensed and liquefied.

  The first gas cooler 21 is provided with a coiled cooling pipe 24 as a first cooling means inside a cylindrical cooling vessel. The inlet side of the cooling pipe 24 is on the cooling medium temperature controller 10 side. The outlet side is connected to the refrigerant recovery side on the coolant temperature controller 10 side. The first gas cooler 21 is provided with a jacket 25 on the outer wall of the cooling container, and a cooling water inlet 25a provided at the lower portion of the jacket 25 is connected to the refrigerant supply side of the cooling medium temperature controller 10, and the jacket The cooling water flows toward the cooling water outlet 25b provided in the upper part of 25, so that the temperature around the cooling container can be controlled. That is, the outer wall temperature of the cooling container is maintained at the temperature of the refrigerant regardless of the temperature of the outside air, so that the temperature inside the cooling container is maintained at a temperature suitable for condensing and liquefying the solvent gas, and the condensation effect is enhanced. The temperature of the lower part of the liquid crystal is too low to prevent inconvenience such as liquefaction of water vapor. A cooling water recovery pipe 26 is connected to the cooling water outlet 25 b, and the refrigerant that has passed through the jacket 25 is returned to the cooling medium temperature controller 10 via the cooling water recovery pipe 26.

  The cooling medium temperature controller 10 includes a refrigerant tank 30, a heating unit 11 and a cooling unit 31 provided in the refrigerant tank 30, and a refrigerant pump 32 that sucks and pumps the refrigerant in the refrigerant tank 30. Has been. The heating unit 11 in the present embodiment is configured by a coiled heating tube that can introduce heating oil from the heating tank 3 of the distillation pot 2 and raise the temperature of the refrigerant in the refrigerant tank 30. On the other hand, the cooling unit 31 has a coil shape capable of lowering the temperature of the refrigerant in the refrigerant tank 30 by introducing the cooling water sent to the second gas cooler 23 through the water separator 33 through the branch pipe 34 and passing it through. It consists of a cooling pipe. In this embodiment, since water is used as the refrigerant, a refrigerant replenishing valve 37 is provided in the middle of the pipe 36 for returning the cooling water that has passed through the branch pipe 34 to the sludge tank 35 side as a waste liquid tank, When the refrigerant replenishing valve 37 is opened, water can be replenished into the refrigerant tank 30.

  Next, the second gas cooler 23 will be described. The second gas cooler 23 is a second-stage gas cooler connected in series downstream of the first gas cooler 21 and is coiled as a second cooling means inside a cylindrical cooling vessel. A cooling pipe 39 is provided, the inlet side of the cooling pipe 39 is connected to the cooling water inlet 41 side of the regenerator 1 via a cooling water supply pipe 40, and the outlet side is connected via a cooling water delivery pipe 42. It is connected to the sludge tank 35 side. Further, an upper portion of the cooling container of the second gas cooler 23 (in this embodiment, a gas outlet provided on the ceiling) is connected to a decompression device to be described later via a pipe 43, and the interior of the cooling container is connected by this decompression device. The internal pressure of the first gas cooler 21 is reduced to below atmospheric pressure by this pressure reduction, and the inside of the distillation still 2 is reduced to below atmospheric pressure by this pressure reduction. A drain recovery pipe 45 is connected to the drain valve 44 provided at the bottom of the cooling container, and water or the like condensed and liquefied by the second gas cooler 23 can be recovered in the sludge tank 35 via the drain recovery pipe 45. It is constituted as follows.

The above-described decompression device is also referred to as a so-called vacuum generation device, and is provided in a circulation path 50 for circulating the regenerated solvent regenerated by the first gas cooler 21 through the water separator 33 and in the middle of the circulation path 50. It consists of a solvent circulation pump 51 and an ejector 52. That is, the regenerated solvent introduced from the lower part of the water separator 33 is circulated again to the upper part of the water separator 33 through the solvent circulation path 50 by the solvent circulation pump 51. The ejector 52 is provided in the solvent circulation path 50, A pipe 43 communicated with the upper part of the second gas cooler 23 is connected to the negative pressure generating portion of the ejector 52, whereby the negative pressure generated in the ejector 52 causes the inside of the second gas cooler 23, the first gas. The inside of the cooler 21 and the inside of the distillation pot 2 are sequentially brought into a reduced pressure state. Further, in the middle of the pipe 43 connected to the ejector 52, the other end of a condensate recovery pipe 54 having one end connected to the bottom of the first gas cooler 21 is connected. Accordingly, the regenerated solvent condensed and liquefied by the first gas cooler 21 can be sucked into the solvent circulation path 50 of the decompression device via the condensate recovery pipe 54. A check valve 55 and an opening / closing valve 56 are provided in the middle of the condensate recovery pipe 54 connecting the bottom of the first gas cooler 21 and the solvent circulation path 50 of the decompression device. The regenerated solvent condensed and liquefied by the cooler 21 is continuously sucked into the solvent circulation path 50.
Note that the regenerated solvent condensed and liquefied by the first gas cooler 21 in the present invention has a much lower moisture content than the conventional solvent, but the moisture separator 33 constituting a part of the decompression device is used. If it passes, it can be set as a regenerated solvent with less moisture.

  The above-described water separator 33 is capable of taking out the regenerated solvent which has become a supernatant and having increased purity while precipitating water by utilizing the difference in specific gravity between the regenerated solvent and water. It is divided into a chamber and a lower chamber, communicated from the upper chamber to the regeneration solvent outlet 57, so that the regeneration solvent can be taken out from the regeneration solvent outlet 57 as necessary, and the recycling solvent for circulation is taken out from the circulation outlet 58 in the lower chamber It is possible. Further, in the lower chamber of the water separator 33, a cooling pipe 59 through which cooling water from the outside taken in from the cooling water inlet 41 of the regenerator 1 is provided is configured to cool the regenerated solvent.

Next, a procedure or a regeneration method for regenerating the used cleaning solvent by operating the cleaning solvent regenerating apparatus 1 having the above-described configuration will be described.
First, a used cleaning solvent (a solvent to be recycled) is prepared so that it can be introduced into the distillation pot 2 from the distillation solvent inlet 9 of the regeneration apparatus 1, and the operation start switch of the control device is turned on after the preparation is completed. . Then, the solvent circulation pump 51 is started, and the air in the distillation still 2 is started to be sucked by the action of the ejector 52. Further, the oil heater 4 in the heating tank 3 is activated to start heating the oil.

And while detecting that the inside of the distillation pot 2 reached a predetermined degree of vacuum with a vacuum gauge (not shown), heated oil reached a predetermined temperature with an oil temperature controller (for example, a thermostat for temperature adjustment). When this is detected, the solvent introduction valve 16 is opened under the control of the control device, and the cleaning solvent before regeneration containing dirt such as moisture and oil is introduced into the distillation kettle 2 from the inlet 9 of the solvent to be distilled. The amount of the cleaning solvent introduced into the still 2 is adjusted by the liquid level adjuster 15, but the liquid level of the solvent is located above the upper part of the heating tank 3 and the heating coil 5 is always immersed in the solvent. It is injected to the position to do.
In addition, the used solvent before the reproduction | regeneration guide | induced to the distillation pot 2 removes a dust etc. previously by the solvent strainer 13. FIG.

  As described above, when the oil heater 4 provided in the heating device of the distillation pot 2 is turned on, the oil in the heating tank 3 is heated and the oil circulation pump 6 is operated to The oil is pumped to the heating coil 5 in the distillation kettle 2, whereby the reclaimed solvent in the distillation kettle 2 is heated from the outside by the oil in the heating tank 3, and is also brought into direct contact with the heating coil 5 and heated. When the operation start switch is turned on, the solvent circulation pump 51 is activated to start the circulation of the regenerated solvent accumulated in the water separator 33, thereby generating a negative pressure in the ejector 52 and the second gas cooling. The inside of the vessel 23, the first gas cooler 21, and the distillation pot 2 is depressurized to atmospheric pressure or less.

  When the temperature of the regenerated solvent in the distillation pot 2 rises under this reduced pressure, the solvent, water and the like start to evaporate, and when the oil rises to a predetermined temperature, the regenerated solvent evaporates in the distillation pot 2 under the reduced pressure state. It becomes superheated gas containing superheated steam. Then, the superheated gas is sent to the first gas cooler 21 through the gas pipe 20 by suction of the ejector 52.

  When the gas is sent to the inside of the first gas cooler 21, the periphery of the cooling container is surrounded by the jacket 25, and the temperature adjusted refrigerant supplied from the coolant temperature controller 10 is maintained at a preset temperature. In addition, the temperature-adjusted refrigerant is sent to the cooling pipe 24 to keep the inside of the cooling container at a predetermined temperature. The predetermined temperature is higher than the boiling point of water and is a temperature at which the cleaning solvent can be liquefied. In this embodiment, the inside of the first gas cooler 21 is depressurized to −10 kPa. The boiling point of the cleaning solvent (the aforementioned non-aqueous cleaning agent) is about 85 ° C. Therefore, this 85 ° C. is set as a predetermined temperature in the control device. Further, in accordance with this temperature setting, the temperature management in the cooling medium temperature controller 10 is executed under the control of the control device, and the control device performs the heating oil path on-off valve 61 and cooling based on the signal from the refrigerant temperature sensor. The temperature of the refrigerant sent to the first gas cooler 21 is adjusted by appropriately opening and closing the on-off valve 62 of the water path to manage the internal temperature of the first gas cooler 21 at the predetermined temperature.

  The boiling point of the cleaning solvent is about 85 ° C., whereas the boiling point of water under the same pressure is 45 ° C. The present invention uses the temperature difference between the boiling points to make the first gas cooler In 21, the cleaning solvent is condensed and liquefied, and the gas that has not been liquefied here is condensed and liquefied by the second gas cooler 23 downstream, and the cleaning solvent condensed and liquefied by the first gas cooler 21 is taken out as a recycled solvent and reused. To do. Accordingly, the liquid taken out as the regenerating solvent can be obtained in good quality with almost no moisture.

  More specifically, when a gas is introduced into the first gas cooler 21, the gas is cooled by contacting the surface of the cooling pipe 24 or the inner wall of the cooling container. At this time, the solvent component is condensed and liquefied when the temperature is lowered to the above-described predetermined temperature in a gas state, and gradually flows down and accumulates at the bottom of the cooling container. On the other hand, a substance lower than the boiling point of the solvent, such as moisture, in the gas sent from the distillation kettle 2 is not liquefied even when the temperature drops to the predetermined temperature, and maintains the gas state. The air is sucked from the opened outlet and transferred to the second gas cooler 23 through the gas pipe 22.

  When the opening / closing valve 56 is opened, the solvent liquefied in the first gas cooler 21 is taken into the circulation path 50 by the suction of the ejector 52 and sent to the moisture separator 33. The water separator 33 separates and separates the water content when water is contained. Therefore, the liquid taken out from the regeneration solvent outlet 57 of the moisture separator 33 becomes a high-quality regeneration solvent containing almost no moisture, and excellent cleaning characteristics can be expected even when compared with those regenerated with a conventional regeneration apparatus.

  The gas sent to the second gas cooler 23 is cooled to be condensed and liquefied by contacting the cooling pipe 39 in the cooling container. The liquid liquefied in the second gas cooler 23 is sent to the sludge tank 35 when the drain valve 44 is opened, and is processed as sludge. That is, it is discarded.

  In addition, when the sludge tank 35 opens the atmosphere release valve 70 to return the inside of the still 2 to atmospheric pressure and then opens the discharge valve 63, the sludge tank 35 receives and stores the dirt remaining at the bottom of the still 2. When 64 is opened, it is discharged from the drain outlet 65 together with the condensate from the second gas cooler 23 and discarded.

  In the above-described embodiment, the internal temperature of the first gas cooler 21 is maintained at about 85 ° C., but this temperature varies depending on the characteristics of the cleaning solvent, the contamination, and the like. It is also affected by the temperature of the gas gasified in the still, so a gas temperature detector is provided, the gas temperature is detected by this detector, a signal is sent to the control device, and it is suitable for the detected gas temperature. It may be configured to automatically adjust to the refrigerant temperature. For example, when the gas temperature is 85 ° C., the refrigerant temperature is set to 60 ° C., but when the gas temperature fluctuates to 90 ° C., the control device automatically sets the refrigerant temperature to 65 ° C. You may do it. Such a map of the gas temperature and the refrigerant temperature is stored in the control device in advance, and an optimum refrigerant temperature table is read based on the gas temperature signal from the gas temperature detector, so that the control device adjusts the coolant temperature. The internal temperature of the first gas cooler 21 may be controlled via the vessel 10.

It is a schematic block diagram of a solvent reproduction | regeneration apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Regenerating apparatus 2 Distilling pot 3 Heating tank 4 Oil heater 5 Heating coil 6 Oil circulation pump 9 Distilled solvent inlet 10 Cooling medium temperature controller 11 Heating part 12 Oil temperature controller 13 Solvent strainer 14 Distilled solvent supply piping 15 Liquid Level adjuster 16 Solvent charging valve 21 First gas cooler 23 Second gas cooler 24 Cooling pipe 25 as first cooling means Jacket 30 Refrigerant tank 31 Cooling unit 32 Refrigerant pump 33 Moisture separator 35 Sludge tank 39 Second cooling Cooling pipe 44 as means Drain valve 50 Circulation path 51 Solvent circulation pump 52 Ejector 57 Recycled solvent outlet 59 Cooling pipe 65 Drain outlet

Claims (4)

A distillation kettle for heating the used cleaning solvent, a first gas cooler communicatively connected to the distillation kettle, a second gas cooler communicatively connected to the first gas cooler, and a pressure reducing device communicated to the distiller And a waste liquid tank provided below the distillation kettle,
The first gas cooler is provided with a first cooling means for cooling the inside, and the second gas cooler is provided with a second cooling means for cooling the inside,
The first cooling means cools the inside of the cooler to a temperature higher than the boiling point of water and capable of liquefying the cleaning solvent, and the second cooling means is cooled to a temperature capable of liquefying water vapor. Is set to cool,
The gas sent from the distillation kettle is passed in order from the first gas cooler to the second gas cooler, the cleaning solvent gas in the gas is liquefied by the first gas cooler, and the remaining gas is liquefied by the second gas cooler. A cleaning solvent reclaiming device characterized in that the remaining components such as water vapor are liquefied by being sent to.   The first gas cooler includes a cooling pipe as a first cooling means arranged inside the cooling main body, and a cooling medium temperature controller that manages the temperature of the refrigerant in the middle of the pipe that supplies the refrigerant to the cooling pipe. The apparatus for regenerating a cleaning solvent according to claim 1.   The cleaning apparatus for regenerating a cleaning solvent according to claim 1 or 2, wherein the first gas cooler includes a jacket on the outer wall of the cooling body, and allows the refrigerant to be passed through the first cooling means to pass through the jacket. The used cleaning solvent is heated and gasified in the distillation kettle under a reduced pressure lower than atmospheric pressure, and the gas is passed through the first gas cooler connected to the distillation kettle and then in the second gas cooler. Introduced sequentially,
In the first gas cooler, the cleaning solvent gas in the gas is liquefied by cooling to a temperature higher than the boiling point of water and a temperature at which the cleaning solvent can be liquefied,
In the first gas cooler, the gas remaining without being liquefied is sent to the second gas cooler to liquefy the remaining components such as water vapor in the second gas cooler,
A method for distilling and regenerating a cleaning solvent, wherein the condensate liquefied by the first gas cooler is taken out as a regenerating cleaning solvent.

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