JPH08215501A - Regenerator for petroleum-based solvent - Google Patents

Abstract

PURPOSE: To provide a regenerator for petroleum-based solvent easy for installation and transfer causing no environmental pollution. CONSTITUTION: A regenerator for petroleum-based solvent is provided with a distillation kettle 1 having a heating tank 3 in the bottom part and a heating coil 2 arranged inside, a petroleum-based solvent gas cooler 27 communicating with and connected to the upper part of the distillation kettle 1, a vacuum generator 29 communicating with and connected to the upper part of the distillation kettle 1, a waste liquid tank 36 installed below the distillation kettle 1, and a waste liquid cooler 37 installed in the outer peripheral part of the waste tank 36. In this regenerator, a cooling water chiller 40 formed integrally with the regenerator is connected to the petroleum-based solvent gas cooler 27 and the waste liquid cooler 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petroleum solvent reclaiming apparatus for reclaiming petroleum solvent containing dirt such as fats and oils by vacuum distillation by washing electronic parts and the like.

[0002]

2. Description of the Related Art As is well known, the use of solvents such as CFCs is regulated from the viewpoint of preventing environmental pollution, and petroleum solvents such as hydrocarbon solvents and non-aqueous solvents are drawing attention as alternative solvents. . If you use these petroleum-based solvents to clean electronic parts, the machine oil such as cutting oil, flux, dust, etc. adhering to the parts to be cleaned mixes with the cleaning liquid and is installed in the cleaning device. It cannot be removed just by passing it through a filter. Further, the petroleum solvent is an expensive solvent, and it is desirable that the petroleum solvent can be reused from the viewpoint of resource saving.

Therefore, the present applicant has developed and applied for a petroleum solvent regenerator (Japanese Patent Application No. 4-35810). This regenerator is equipped with a distillation pot for evaporating the petroleum solvent to be regenerated by passing steam inside, a cooler connected to the upper part of the distillation pot, and a vacuum generator connected to the distillation pot for communication. At that time, the petroleum solvent is steam-heated and vacuum-distilled to vaporize the petroleum solvent gas.The petroleum solvent gas is cooled by a cooler to agglomerate and liquefy. The waste liquid is allowed to remain, and the waste liquid is cooled and then discharged. A cooling water pipe is connected to the cooler for cooling the petroleum-based solvent gas and the cooler for cooling the waste liquid, respectively, and the petroleum-based solvent gas and the waste liquid are discharged by the cooling water supplied from the cooling water pipe. It is cooling.

[0004]

However, in the above-described petroleum solvent regenerating apparatus, the cooling water for cooling the cooler for cooling the petroleum solvent gas and the cooler for cooling the waste liquid is tap water or Well water is used. Therefore, there is a problem in that a cooling water pipe for guiding tap water, well water, or the like needs to be installed, which makes the piping work of the cooling water pipe troublesome. Also, once the cooling water pipe is installed,
When relocating a petroleum solvent regenerator, the cooling water pipe must be removed and piping must be re-established, so the regenerator relocation work is troublesome and the relocation cost is high. was there. Furthermore, if the warm waste water after cooling is discarded indiscriminately, there is a problem that environmental pollution may occur. If tap water is directly circulated and cooled, the water temperature changes greatly depending on the season, so stable operation cannot be expected.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a regenerating apparatus for petroleum solvent, which is easy to install and relocate the apparatus and does not cause environmental pollution. With the goal.

[0006]

The present invention is to achieve the above-mentioned object, and the contents thereof will be described below. According to the first aspect of the invention, a distillation tank having a heating tank at the bottom and a heating coil disposed therein, a petroleum solvent gas cooler connected in communication with the upper portion of the distillation tank, and connected with the upper portion of the distillation tank are connected. Equipped with a connected vacuum generator, a waste liquid tank provided below the distillation tank, and a waste liquid cooler provided on the outer periphery of the waste tank, the petroleum solvent is vacuum distilled in the distillation tank to produce petroleum solvent gas. Evaporate, cool the petroleum solvent gas with a petroleum solvent gas cooler to condense and liquefy it, and leave the waste liquid consisting of dirt such as fats and oils in the distillation pot and collect it in the waste liquid tank. In a petroleum-based solvent regenerator that is cooled by a cooler and discharged, a regenerator for petroleum-based solvent is connected to the petroleum-based solvent gas cooler and the waste liquid cooler to connect a cooling device integrated with the regenerator. Is configured.

According to the second aspect of the invention, in the cooling device, the heat exchanger provided in the middle of the refrigerant circulation passage is connected to the cooling water circulation passage having the cooling water circulation pump so as to circulate through the cooling water circulation passage. A cooling water chiller for cooling the cooling water by the heat exchanger is used.

[0008]

According to the present invention, the inside of the distillation still is heated by the heating tank having the heating coil, and the inside of the distillation still is brought into a vacuum state by the vacuum generator connected to the upper part. Therefore, the petroleum-based solvent containing dirt such as oil and fat supplied into the distillation pot is vacuum-distilled and guided from the upper part of the distillation pot to the petroleum-based solvent gas cooler to be condensed and liquefied. On the other hand, in the distillation pot, a waste liquid consisting of dirt such as fats and oils contained in the petroleum solvent remains and is collected in the waste liquid tank.
It is cooled by the waste liquid cooler and discharged. The petroleum solvent gas cooler and the waste liquid cooler are cooled by a cooling device provided integrally with the regenerating device. Therefore, it is not necessary to connect a cooling water pipe from the outside of the apparatus, and the installation and relocation of the petroleum solvent regenerator becomes easy.

According to the second aspect of the invention, the cooling device comprises a cooling water chiller. Then, in the cooling water chiller, the refrigerant circulating in the refrigerant circulation path is guided to the heat exchanger and cooled. The cooled cooling water is introduced to the petroleum solvent gas cooler and the waste liquid cooler to cool the petroleum solvent gas and the waste liquid. Therefore, since cooling water is not discharged to the outside of the device, there is no possibility of causing environmental pollution due to hot waste water.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a petroleum solvent regenerator according to the present invention, and FIG. 2 is a schematic configuration diagram of a cooling water chiller which is an example of a cooling device.

In FIG. 1, reference numeral 1 designates a pressure-resistant substantially cylindrical distillation pot 1, and a heating coil 2 for heating a petroleum solvent supplied into the distillation pot 1 is provided below the inside of the distillation pot 1. A heating tank 3 communicating with the heating coil 2 is provided so as to cover the outer bottom of the distillation pot 1. The heating coil 2 is provided at a position below the liquid surface of the petroleum solvent so that the heating coil 2 is constantly immersed in the petroleum solvent supplied into the distillation still 1. Further, the heating tank 3 is provided such that the uppermost part thereof is located below the liquid surface of the petroleum solvent supplied into the distillation still 1.

In addition, above the inside of the still pot 1, at a position above the liquid level of the petroleum solvent supplied into the still pot 1,
A wire net 4 having an outer peripheral shape substantially similar to the inner peripheral shape of the distillation still 1 is detachably provided. The wire mesh 4 has a wire diameter of 0.2 mm or more and is composed of 10 to 63 mesh,
It is made by stacking a few wire meshes. Further, the space of the wire netting 4 can be increased by bending the surface of the wire netting 4 to form an uneven shape. When the petroleum solvent is boiled, the wire netting 4 prevents dirt components such as fats and oils azeotroped with the petroleum solvent from scattering into the upper part of the distillation pot 1 and mixing in the regenerated petroleum solvent gas. In addition to preventing it, it also removes contaminants by adhering them.

A reaction rod 6 is inserted into the distillation pot 1 through a reaction rod insertion hole 5 provided in the upper portion. This reaction rod 6
Has a length such that when it is inserted into the still pot 1, it reaches almost the bottom of the still pot 1 and the tip portion is immersed in the medium oil,
The material is a material that reacts more easily with a reaction substance such as an acid or an alkali than the material forming the distillation still 1.

Further, an external air communication pipe 9 having a pressure gauge 7 and an opening / closing 8 valve is provided above the distillation pot 1. Therefore, when the pressure inside the distillation pot 1 exceeds a predetermined pressure,
It is possible to prevent the explosion of the distillation pot 1 by opening the on-off valve 8 and communicating the distillation pot 1 with the outside air through the outside air communication pipe 9.

A flame-retardant medium oil is supplied to the above-mentioned heating coil 2 and heating tank 3 as a heating medium.
This medium oil is first transferred from the bottom of the still 1 to the still 1
The heating coil 2 that has been guided inside rises, reaches the upper part of the heating coil 2, is once guided to the outside of the distillation pot 1, is supplied into the heating tank 3 from the lower part of the heating tank 3, and has a shielding structure inside the heating tank 3. The oil return pipe 10 is passed from the upper portion of the heating tank 3 while circulating through the heating tank 3 by (not shown).
Return to

This medium oil is used in the heating oil tank 11
Is heated by. A heating heater 12 is provided at the bottom of the heating oil tank 11, and a float level gauge 13 is provided above the heating oil tank 11 for keeping the amount of oil in the heating oil tank 11 constant. An oil introducing pipe 14 is connected to the lower part of the heating oil tank 11, and an oil return pipe 10 from the heating tank 3 is connected to the upper part thereof. An oil circulation pump 15 is provided in the middle of the oil introduction pipe 14.
Is provided and sends the medium oil heated in the heating oil tank 11 to the heating coil 2. Further, a temperature adjusting thermostat 16 is provided on the oil introduction pipe 14 on the downstream side of the oil circulation pump 15.
The temperature of the medium oil flowing through is adjusted.

The above-mentioned heater 12 is composed of a plurality of heaters that can be operated separately. In this embodiment, two heating heaters 12a and 12b are used, one heating heater 12a constantly heats the medium oil, and the other heating heater 12b intermittently heats the medium oil. That is, when the temperature adjusting thermostat 16 detects that the oil has reached the preset upper limit temperature, it is controlled by only one heating heater 12a by the control of an electric control means (not shown) provided at an appropriate portion of the regenerator. The oil is heated and kept warm. When the temperature adjusting thermostat 16 detects that the oil has dropped to a preset lower limit temperature, both heating heaters 12a and 12b are operated by the control of the electric control means to heat the oil.

Further, an outside air communication pipe 17 is provided above the heating oil tank 11, and even if the pressure inside the heating oil tank 11 rises.
Can be prevented from exploding.

A solvent pipe 20 provided with a solvent injection valve 19 is connected to the above-mentioned distillation pot 1 from a solvent injection port 18 provided in the lower part, and a petroleum solvent containing dirt such as oil and fat is supplied. A liquid level adjuster 21 is provided in the middle of the solvent pipe 20, and the upper part of the liquid level adjuster 21 is connected to the upper part of the distillation pot 1 to connect the liquid level of the petroleum solvent in the distillation pot 1 to each other. I am adjusting. Further, an economizer 22 for heat exchange is provided on the upstream side of the liquid level adjuster 21, and the petroleum solvent supplied to the distillation pot 1 is left over by the petroleum solvent gas discharged from the distillation pot 1.

Further, on the upstream side of the economizer 22,
A first filter 23 for adsorbing and removing dust contained in the petroleum solvent and a second filter 24 for adsorbing and removing reaction substances such as acids and alkalis contained in the petroleum solvent are provided. The first filter 23 adsorbs and removes dust and the like with a filter paper and the like, and the second filter 24 adsorbs and removes the reaction substance with an adsorbent such as zeolite. In addition, the first filter 23 and the second filter 24
If the cartridge type is removable, the filter can be easily replaced. In the present embodiment, the first filter 23 is provided on the upstream side of the second filter 24, but the positions of both filters may be reversed.

A solvent exhaust port 25 for discharging the vacuum-distilled petroleum-based solvent gas is provided at the upper part of the distillation pot 1, and the petroleum-based solvent gas passes from the solvent exhaust port 25 through the solvent gas pipe 26. Condensed and liquefied by the petroleum solvent gas cooler 27 via the economizer 22 described above,
It is guided to the vacuum generator 29 through the check valve 28. Further, a thermometer 30 for measuring the temperature of the petroleum solvent gas is provided on the side of the distillation pot 1 of the solvent gas pipe 26.

Inside the petroleum solvent gas cooler 27 described above, cooling water flows from a cooling water inlet 31 provided at a lower portion toward a cooling water outlet 32 provided at an upper portion. A cooling water pipe 33 is connected to the cooling water inlet 31, and a cooling water valve 34 and a cooling water strainer 35 are provided on the cooling water pipe 33. And petroleum solvent gas cooler 2
The cooling water discharged from the cooling water outlet 32 after passing through 7 is discharged from the cooling water inlet 38 provided at the lower part of the waste liquid cooler 37 provided at the outer peripheral portion of the waste liquid tank 36, which will be described in detail later, to the waste liquid cooler 3
After being guided into 7 to further cool the waste liquid, the waste liquid cooler 3
It is discharged from a cooling water outlet 39 provided at the upper part of 7.

On the upstream side of the cooling water strainer 35 provided in the cooling water pipe 33, a cooling water circulation pipe 41a of a cooling water chiller 40 functioning as a cooling device is connected in communication. The cooling water chiller 40 is provided integrally with the regenerator, the heat exchanger 42 is exposed to the heat exchange section 44 of the refrigerant circulation passage 43, and the refrigerant circulation passage 43 on the downstream side of the heat exchanger 42 is A compressor 45, a condenser 47 having a fan motor 46, and a strainer 48 toward the downstream side,
The capillary tubes 49 are connected to each other, and the refrigerant circulation path 43 on the downstream side of the capillary tubes 49 is connected to the upstream side of the heat exchange section 44. Further, a high pressure switch 50 is provided between the condenser 47 and the strainer 48 in the refrigerant circulation path 43.

One end of a cooling water circulation pipe 41b having a cooling water circulation pump 52 is connected to the circulating cooling water inlet 51 provided in the heat exchanger 42, and the upstream side of the cooling water circulation pipe 41b is connected to the cooling water. Water tank 53 for storing water
Is connected to. Further, a priming port 54 is provided in the cooling water circulation pipe 41b on the upstream side of the cooling water circulation pump 52, and the cooling water circulation pipe 41 guided into the water tank 53 is provided.
A foot valve strainer 55 is attached to the tip of b.

On the other hand, the other end of the cooling water circulation pipe 41a is connected to the circulating cooling water outlet 56 provided in the heat exchanger 42, and the cooling water circulation pipe 41a is located on the upstream side of the cooling water pipe 33. Is connected to the cooling water strainer 35, and supplies cooling water to the petroleum solvent gas cooler 27 and the waste liquid cooler 37. Then, the cooling water guided from the cooling water inlet 38 of the waste liquid cooler 37 into the waste liquid cooler 37 is discharged from the cooling water outlet 39, guided to the cooling water circulation pipe 41c, and returned to the water tank 53.

Therefore, in the cooling water chiller 40,
The refrigerant circulating in the refrigerant circulation path 43 is compressed by the compressor 45, then condensed by the condenser 47, and dust and the like are removed by the strainer 48, and the capillary tube 49.
Through the heat exchanger 42. And the heat exchanger 42
The cooling water is cooled when passing through the heat exchange section 44 of the cooling water, and the cooled cooling water is circulated in the cooling water circulation pipe 41 a by the cooling water circulation pump 52 while the petroleum solvent gas cooler 27 and the waste liquid cooler 37. To cool the petroleum solvent gas and waste liquid.

The above-mentioned vacuum generator 29 comprises a solvent circulation pump 58 and an ejector 59 provided in a path for circulating the regenerated petroleum solvent to the water separator 57. That is, the petroleum solvent introduced from the lower portion of the water separator 57 is circulated again to the upper portion of the water separator 57 by the solvent circulation pump 58 through the solvent circulation passage 60. The solvent circulation passage 60 is provided with an ejector 59. By connecting the downstream side of the check valve 28 to the ejector 59, the negative pressure generated in the ejector 59 causes the petroleum solvent that has been condensed and liquefied by the petroleum solvent gas cooler 27 and passed through the check valve 28 to be sucked. As a result, the inside of the distillation still 1 is in a vacuum state.

The above-mentioned water separator 57 is divided into an upper chamber 61 and a lower chamber 62, and an element support rod 64 having an opening 63 at the upper portion is provided upright at substantially the center of the upper chamber 61. The element supporting rod 64 is covered with the element 65. Further, the lower chamber 62 and the upper chamber 61 are internally connected to each other through the opening 63 formed in the element support rod 64, and also externally connected to each other by the solvent circulation path 60 as described above. Further, a discharge port 66 for discharging the petroleum solvent is provided in the upper part of the lower chamber 62, and the petroleum solvent from which water has been removed is introduced into the regenerated solvent tank (not shown) through the discharge port 66. Get burned. In this moisture separator 57, the circulating petroleum solvent and the newly liquefied and condensed petroleum solvent are supplied from the upper part of the upper chamber 61, and the moisture is removed by passing through the element 65, and the element support rod 64 is provided. A part of the petroleum-based solvent introduced from the opening 63 of the upper chamber 61 to the lower chamber 62 passes through the solvent circulation pump 58 and is returned to the upper chamber 61.
The remaining petroleum solvent is circulated to the outlet 66
Is discharged from the recycled solvent tank.

The element 43 to be inserted into the moisture separator 57 has a cylindrical shape having an insertion hole for inserting the element support rod 64 in the central portion, and a filter paper portion is provided on the outer periphery of the element 43. A water absorbing section made of a non-woven fabric is provided around the circumference. Therefore, the regenerated petroleum solvent is used as the water separator 5
Since the water content contained in 7 is removed, the quality of the product after recycling can be improved.

The waste liquid (sludge) remaining in the distillation pot is
It is temporarily stored in a waste liquid tank 36 provided below the distillation still 1. The waste liquid tank 36 has a substantially cylindrical shape, and a waste liquid inlet 67 provided at an upper portion communicates with a waste liquid discharge port 68 provided at a lower portion of the distillation pot 1 via a waste liquid pipe 69. The waste liquid pipe 69 is provided with an opening / closing valve 70 for opening and closing the waste liquid pipe 69. Therefore, when the opening / closing valve 70 is opened, the waste liquid remaining in the still 1 flows from the waste liquid discharge port 68 through the waste liquid pipe 69 into the waste liquid tank 36.

Further, one end of a conducting pipe 71, which branches from the waste liquid pipe 69, is connected to the waste liquid pipe 69 downstream of the opening / closing valve 70, and the other end of the conducting pipe 71 introduces outside air. It is connected to the side of the still 1 via a possible three-way switching valve 72. By operating the three-way switching valve 72, the waste liquid tank 36 can be selectively connected to the distillation pot 1 side or the outside air side.

Further, on the outer peripheral portion of the waste liquid tank 36,
A waste liquid cooler 37 is provided. As described above, in the waste liquid cooler 37, the cooling water after cooling the petroleum solvent gas cooler 27 flows from the cooling water inlet 38 provided at the lower portion to the cooling water outlet 39 provided at the upper portion. The cooling water guided through the cooling water outlet is returned to the cooling water circulation pipe 41c of the cooling water chiller 40 and cooled again by the heat exchanger 42.

A waste liquid outlet port 73 is provided at the bottom of the waste liquid tank 36, and a waste liquid outlet pipe 75 provided with a waste liquid valve 74 is connected to the waste liquid outlet port 73. It is a waste liquid outlet 73. Therefore, when the waste liquid valve 74 is opened, the waste liquid temporarily stored in the waste liquid tank 36 and cooled is discharged into the waste liquid outflow pipe 7.
The waste liquid is discharged from the waste liquid outlet 73 via 5.

Next, a procedure for regenerating the petroleum solvent by using the above-mentioned petroleum solvent regeneration device will be described. At the start of operation, first, the opening / closing valve 70 is closed, the three-way switching valve 72 is closed to the outside air side, and is opened to the waste liquid discharge port 68 side of the distillation still 1 and the waste liquid tank 36 side.

When the operation of the regenerator is started, the solvent circulation pump 58 is started and the action of the ejector 59 starts sucking the air in the distillation pot 1. Also, heating oil tank 1
The heaters 12a and 12b in 1 operate to start heating the medium oil.

When the vacuum gauge 66 detects that the inside of the still pot 1 has reached a predetermined degree of vacuum, and the temperature adjusting thermostat 16 detects that the medium oil has reached a predetermined temperature, electrical control is performed. By the control of the means, the solvent injection valve 19 is opened, and the petroleum solvent before regeneration containing dirt such as oil and fat is introduced from the solvent injection port 18 into the distillation pot 1. The amount of the petroleum solvent introduced into the still 1 is adjusted by the liquid level adjuster 21. The liquid level of the petroleum solvent is located above the upper part of the heating tank 3 and the heating coil 2 is always It is injected to the position where it is immersed in the system solvent.

At this time, the first filter 23 removes dust and the like from the petroleum solvent before being introduced into the distillation still 1, and the second filter 24 removes reaction substances such as acid and alkali.

Further, the waste liquid containing dirt such as fats and oils which is azeotroped at the same time when the petroleum solvent is boiled is prevented from rising by the wire netting 4 and attached to the wire netting 4 to be removed.

Further, at the same time when the solvent injection valve 19 is opened, the cooling water valve 34 is opened, and the cooling water circulating through the cooling water circulation pipe 41 of the cooling water chiller 40 is guided to the cooling water petroleum solvent gas cooler 27 and The cooling of the waste liquid cooler 37 is started.

The petroleum-based solvent gas heated and vaporized in the distillation pot 1 is sucked into the solvent gas pipe 26 by the action of the ejector 59 and guided to the petroleum-based solvent gas cooler 27 via the economizer 22. Petroleum solvent gas cooler 2
The petroleum-based solvent gas that has been cooled and condensed and liquefied in 7 has its water content removed by a water separator 57 to become a pure petroleum-based solvent gas, which is sent to a regenerated solvent tank (not shown). still,
In the economizer 22, petroleum solvent gas is used to distill the kettle 1
The petroleum-based solvent gas before regeneration, which is introduced into the inside, is preheated, and the petroleum-based solvent gas is slightly cooled.

In this distillation step, the waste liquid tank 36
Is communicated with the still pot 1 through the conducting pipe 71, the inside of the waste liquid tank 36 is in a vacuum state substantially similar to the inside of the still pot 1.

The heating heater 12 for heating the medium oil in the heating oil tank 11 is composed of two heaters 12.
a, 12b, when the temperature adjustment thermostat 16 detects that the oil has reached the preset upper limit temperature, the oil is heated and kept warm by only one heating heater 12a by the control of the electric control means,
When the temperature adjusting thermostat 16 detects that the oil has dropped to the preset lower limit temperature, both heating heaters 12a and 12b are operated by the control of the electric control means to heat the oil. In this way, the temperature of the medium oil is maintained at the predetermined temperature.

When the distillation process is almost completed, a boiling process for further boiling the waste liquid is performed. When the boil-down process is completed, the opening / closing valve 70 is opened, and the high temperature waste liquid consisting of dirt such as oil and fat remaining in the distillation pot 1 is made to flow down from the distillation pot 1 to the waste liquid tank 36 and is temporarily stored. At this time, since the distillation pot 1 and the waste liquid tank 36 are both in a vacuum state, the waste liquid can easily flow down from the distillation pot 1 into the waste liquid tank 36.

The waste liquid temporarily stored in the waste liquid tank 36 is cooled by the waste liquid cooler 37. Then, when cooling is completed, the three-way switching valve 72 is set to the outside air side and the waste liquid tank 3
6 side and closed to the distillation pot 1 side, outside air is introduced into the waste liquid tank 36 to bring the inside of the waste liquid tank 36 to atmospheric pressure, the waste liquid valve 74 is opened, and the waste liquid is discharged from the waste liquid outlet 73.

When a series of work steps are completed, the waste liquid valve 74 is closed again, the three-way switching valve 72 is closed again to the outside air side, and opened to the distillation pot 1 side and the waste liquid tank 36 side, and the waste liquid tank 36 is evacuated. The above petroleum solvent regeneration operation is repeated.

When the waste liquid process is completed, the regenerating apparatus may be temporarily stopped to stop the regenerating work. However, if the waste liquid tank 58 is not full and the regenerating work can be continued, it should be temporarily stopped. No, you may move to the next work.

[0047]

Since the present invention has the above-mentioned constitution,
The effect explained below is produced. In the invention according to claim 1, the petroleum solvent gas cooler and the waste liquid cooler are cooled by the cooling device provided integrally with the regenerating device. Therefore, it is not necessary to provide a cooling water pipe for guiding tap water, well water, etc. from the outside of the device. Therefore, it is possible to easily install a petroleum solvent regenerator,
Even when the device is relocated, it is not necessary to remove and re-pipe the cooling water pipe, and the device can be easily relocated. Moreover, not only the tap water whose water temperature greatly changes depending on the season is circulated for cooling, but the cooling liquid cooled by the cooling device is circulated for cooling the gas cooler and the like, so that not only the cooling efficiency is high, Stable reproduction can be performed.

According to the second aspect of the invention, the cooling device comprises a cooling water chiller, and in the heat exchanger of the cooling water chiller, the cooling water circulating through the cooling water circulation passage is cooled, and the cooling water is a petroleum-based oil. After being guided to the solvent gas cooler and the waste liquid cooler to cool the petroleum solvent gas and cool the waste liquid, it is circulated again to the cooling water chiller via the cooling water circulation passage. Therefore, since the cooling water is not discharged to the outside of the device, there is no possibility of causing environmental pollution due to hot waste water.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a petroleum solvent regenerator according to the present invention.

FIG. 2 is a schematic configuration diagram of a cooling water chiller.

[Explanation of symbols]

 1 Distiller 2 Heating coil 3 Heating tank 4 Wire mesh 5 Reaction rod insertion port 6 Reaction rod 7 Pressure gauge 8 Open / close valve 9 Outside air communication pipe 10 Oil return pipe 11 Heating oil tank 12 Heating heater 12a Constant heating heater 12b Intermittent heating heater 13 Float Level Gauge 14 Oil Inlet Pipe 15 Oil Circulation Pump 16 Temperature Control Thermostat 17 Outside Air Communication Pipe 18 Solvent Inlet 19 Solvent Injecting Valve 20 Solvent Pipe 21 Liquid Level Regulator 22 Economizer 23 First Filter 24 Second Filter 25 Solvent Exhaust port 26 Solvent gas pipe 27 Petroleum-based solvent gas cooler 28 Check valve 29 Vacuum generator 30 Thermometer 31 Cooling water inlet 32 Cooling water outlet 33 Cooling water pipe 34 Cooling water valve 35 Cooling water strainer 36 Waste liquid tank 37 Waste liquid cooler 38Cooling water inlet 39 Cooling water outlet 40 Cooling water chiller 41 Cooling water circulation pipe 42 Heat exchanger 43 Refrigerant circulation path 44 Heat exchange section 45 Compressor 46 Fan motor 47 Condenser 48 Strainer 49 Capillary tube 50 High pressure switch 51 Circulating cooling water inlet 52 cooling water circulation pump 53 water tank 54 priming port 55 foot valve strainer 56 circulation cooling water outlet 37 water separator 58 solvent circulation pump 59 ejector 60 solvent circulation path 61 upper chamber 62 lower chamber 63 opening 64 element support rod 65 element 66 discharge port 67 Waste Liquid Inlet 68 Waste Liquid Outlet 69 Waste Liquid Pipe 70 Opening / Closing Valve 71 Conducting Pipe 72 Three-way Switching Valve 73 Waste Liquid Outlet 74 Waste Liquid Valve 75 Waste Liquid Outflow Pipe 76 Waste Liquid Outlet

Claims (2)

[Claims] Claim: What is claimed is: 1. A distillation pot having a heating tank at the bottom and a heating coil inside, a petroleum solvent gas cooler connected to the top of the distillation pot, and a vacuum connected to the top of the distillation pot. It is equipped with a generator, a waste liquid tank provided below the distillation tank, and a waste liquid cooler provided on the outer periphery of the waste liquid tank.The petroleum solvent is vacuum distilled in the distillation tank to vaporize the petroleum solvent gas, The petroleum-based solvent gas is cooled by a petroleum-based solvent gas cooler to be condensed and liquefied, and the waste liquid consisting of dirt such as oil and fat is left in the distillation pot and collected in the waste liquid tank, and the collected waste liquid is collected by the waste liquid cooler. A regenerating apparatus for a petroleum solvent to be cooled and discharged, wherein a regenerating apparatus integrated with the regenerating apparatus is connected to the petroleum solvent gas cooler and the waste liquid cooler. . 2. The cooling device, wherein a cooling water circulation passage having a cooling water circulation pump is connected to a heat exchanger provided in the middle of the refrigerant circulation passage, and cooling water circulating in the cooling water circulation passage is connected to the heat exchanger. The apparatus for regenerating petroleum solvent according to claim 1, which is a cooling water chiller for cooling.