JP4459479B2 - Mobile solvent regenerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile solvent recycling apparatus for recycling a contaminated solvent such as a petroleum solvent in which a soil component is dissolved, for example, a used cleaning solvent so that it can be recycled.
[0002]
[Prior art]
By washing factory equipment with cleaning agents such as petroleum solvents, a large amount of solvent contaminated by dirt components such as oil is generated. Conventionally, in business establishments that use a large amount of such cleaning solvents, solvent recycling equipment has been installed and recycled. However, when the amount used is small, cleaning agents from factories and power plants are used. If there are many offices to be scattered around, installing a solvent recycling device at each office would require a large amount of equipment costs as a whole, resulting in waste. It was. For this reason, many were disposed of as industrial waste.
[0003]
[Problems to be solved by the invention]
Therefore, the present invention provides a mobile solvent recycling device that does not need to be installed at each office, and can reduce the cost required for solvent recycling and disposal, and promote the recycling of used solvents. The purpose is to make effective use of resources.
It is another object of the present invention to provide a mobile solvent regenerator having a simple structure that increases the safety of the combustible solvent that accompanies the movement of the solvent regenerator.
[0004]
[Means for Solving the Problems]
For this purpose , a mobile solvent regenerator according to the present invention includes a contaminated solvent tank that stores a contaminated solvent in which a soil component is dissolved, a distillation pot that heats and distills the contaminated solvent supplied from the contaminated solvent tank, and A condenser that liquefies and regenerates by cooling the solvent vaporized in the distillation kettle with cooling water and a regenerated solvent tank that stores the regenerated solvent are installed in the cargo compartment of a moving vehicle and are operatively piped. Extraction means for extracting the residual liquid of the solvent remaining after the regeneration of the solvent in the solvent flow path in the apparatus such as the distillation pot, the condenser and the pipe, and the solvent flow path in the apparatus as an inert gas It is characterized by comprising an inert gas supply means for replacement.
[0005]
Extraction means for extracting the residual liquid of the solvent remaining after the regeneration of the solvent in the flow path of the solvent in the apparatus such as the distillation pot, the condenser or the pipe, and the flow path of the solvent in the apparatus to an inert gas By providing an inert gas supply means for replacement, after the solvent regeneration is completed, the residual solvent remaining in the solvent regeneration device such as a distillation still, condenser, piping, etc. is withdrawn and after withdrawal The remaining solvent combustible gas is replaced with a stable inert gas.
Thereby, at the time of movement after solvent regeneration, the inside of the apparatus is filled with a stable inert gas, and the combustible gas does not remain in the apparatus, so that safety can be improved. In addition, when the solvent to be regenerated is a different type of solvent that has been treated so far, such as different varieties and contamination conditions, the previous residual liquid can be recovered by using the extraction means, and a new Thus, it is possible to prevent the mixing of different solvents during the regeneration, and to cope with the regeneration of various types of solvents.
[0006]
In addition, the recycled solvent tank is characterized by having a structure that enables quantitative measurement of the recycled solvent. That is, the regenerated solvent tank is partitioned into first to Nth ridges adjacent to each other by a partition plate having a communication port at a predetermined height, and the regenerated solvent is poured into the first basin and the A predetermined amount of the regenerated solvent determined by the height of the communication port is metered and stored in each basket. With this configuration, a predetermined amount determined by the height of the communication port is stored in each rod, and the structure of the recycled solvent tank can be obtained without using a complicated measurement circuit device that uses sensors that require an explosion-proof structure. By a simple device, quantitative measurement can be performed, and a mobile solvent regenerator having a simple configuration can be obtained.
[0007]
The present invention also includes an ejector-type suction recovery device as an extraction means for extracting a residual solvent solution remaining in a solvent flow path in the apparatus such as a distillation still, a condenser, or a pipe in the solvent regeneration apparatus. It is characterized by that. With this suction and recovery device, the solvent residual liquid can be recovered almost completely quickly with a simple configuration. As a result, even when the solvent to be regenerated is different from the solvent treated so far, such as different varieties and contamination conditions, the solvent can be regenerated appropriately without mixing.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with respect to the regeneration of the cleaning solvent according to the drawings. As shown in FIG. 1 and FIG. 2, the mobile cleaning solvent regenerator according to the present invention has a regenerator main body 6, a cooler 7, An active gas tank 8, a contaminated solvent tank 9, a regenerated solvent tank 10 and the like are mounted.
[0009]
The contaminated solvent tank 9 and the regenerated solvent tank 10 are provided on the upper and lower stages of a shelf provided near one side wall of the room. A strainer 11 is stretched on the upper surface of the contaminated solvent tank 9 so that the contaminated solvent can be poured into the contaminated solvent tank 9 from a canister 12 for contaminated solvent placed on the strainer.
[0010]
The regenerated solvent tank 10 is configured so as to structurally enable the quantitative measurement of the regenerated solvent. In other words, the recycled solvent tank is partitioned into a plurality of first to Nth bowls by the partition plate, and a communication port is provided at a predetermined height position of the partition plate of each bowl. The regenerated solvent is poured into the first tank of the tank. When a predetermined amount, that is, the height of the communication port of the partition plate is reached, the recycled solvent flows into the adjacent second tank through the communication port. It flows into the cage. A predetermined amount of the solvent accumulated in each basket is taken out through a take-out port provided at the bottom of the bowl. The storage amount of each bag is adjusted by changing the height of the communication port provided in the partition plate.
[0011]
Such quantitative measurement of the solvent enables measurement with a simple structure without using a sensor or the like. Further, such a quantitative metering means of partitioning the inside of the tank into a plurality of baskets with a partition plate having a communication port is applicable not only to the solvent but also to the quantitative metering of various liquids.
[0012]
In the embodiment of the present invention, the regenerated solvent tank 10 is partitioned into four cages 4 by the partition plate 3, and a communication port 5 is opened at a predetermined height portion of the partition plate 3. A faucet 13 is provided on each side, and 18 liters of regenerated solvent is accumulated in each tub. After 18 liters, the regenerated solvent overflows to the adjacent tub through the communication port 5. For this reason, a fixed amount of regenerated solvent accumulates in each basket 4, and the regenerated solvent can be appropriately transferred to the regenerated solvent funnel 14 by opening the tap 13.
Note that a door 26 is provided on the rear surface of the luggage room so that workers can enter and leave the work space 25 provided in the luggage room 2.
[0013]
As shown in FIG. 3, the regenerator main body 6 includes a solvent filter 15, a heat exchanger 16, a liquid level adjuster 17, a distillation pot 18, an oil heater 19, a waste liquid tank 20, and a condenser. 21 and a moisture adsorber 22. The solvent filter 15 captures fine dust in the solvent by allowing the contaminated solvent flowing from the contaminated solvent tank 9 to pass through the pipe 30 and the valve 31. Further, the heat exchanger 16 is provided with an air guide pipe 32 through which the solvent vapor vaporized and discharged in the distillation pot 18 passes, and preheats the contaminated solvent that has passed through the solvent filter 15 by exhaust heat of the solvent vapor. Is.
[0014]
The liquid level adjuster 17 automatically adjusts the amount of the contaminated solvent supplied to the still with the cistern 40 so that the level of the contaminated solvent in the still 18 is constant. The distillation kettle 18 is provided with a pipe 41 inside, and the oil heater 19 is provided with an electric heater 43 in its tank. Then, the oil heated by the electric heater is circulated through the pipe 41 by the pump 44, the solvent in the distillation pot 18 is vaporized by the heat, and the solvent vapor is discharged through the air conduit 32. The drain plug 66 is for extracting oil from the oil heater 19. The waste liquid tank 20 stores the waste liquid residue remaining in the distillation still 18 by this distillation, and 46 is a cooling water pipe disposed in the waste liquid tank.
[0015]
Further, the condenser 21 is provided with a cooling water pipe 50, and the solvent vapor that has passed through the heat exchanger 16 is further cooled by the cooling water pipe to be liquefied and regenerated. Further, 51 is an ejector provided on the secondary side of the condenser 21, and 52 is a check valve. A filter 53 and a cooling water pipe 54 are disposed in the moisture adsorber 22. The solvent in the moisture adsorber 22 is circulated to the ejector 51 by the pump 55, and the liquefied solvent in the condenser 21 is guided to the moisture adsorber 22 by the ejector effect generated by the circulating solvent. The solvent is allowed to overflow from the moisture adsorber 22 to the regenerated solvent tank 10 through the pipe 56.
[0016]
The cooling water pipes 46, 50, 54 are a series, and are communicated with the cooler 7 via pipes 57, 58, and the cold water cooled by the cooler 7 is supplied to the moisture adsorber 22, the condenser 21, The waste liquid tank 20 is circulated in this order. The inert gas tank 8 is provided so that an inert gas such as nitrogen gas can be supplied to the pipe 30 by opening the valve 59.
[0017]
For this reason, this traveling vehicle is made a business trip to the establishment where the solvent polluted by the equipment washing or the like is generated, and the canister 12 containing the contaminated solvent discharged from the establishment is carried onto the contaminated solvent tank 9, The contaminated solvent is poured into the contaminated solvent tank 9. The contaminated solvent poured into the contaminated solvent tank 9 passes through the solvent filter 15, the heat exchanger 16, and the liquid level adjuster 17, enters the distillation pot 18, and is heated by the oil heater 19 so that only the solvent is vaporized. The solvent vapor is led to the condenser 21 through the air conduit 32 and cooled by the cooling water pipe 50 to be liquefied and regenerated.
[0018]
The solvent purified and regenerated in this way is further sucked into the moisture adsorber 22 by the ejector 51 to adsorb moisture, and then flows out into the regeneration solvent tank 10. The regenerated solvent that has flowed into the regenerated solvent tank 10 overflows the communication port 5 and accumulates 18 liters for each basket 4. For this reason, if the faucet 13 is opened, quantitative measurement can be performed without providing sensors such as a level meter and a meter, and the regenerated solvent can be reliably transferred to the regenerated solvent funnel 18 liters at a time.
[0019]
Thus, after the solvent regeneration is completed, the solvent remaining in the contaminated solvent tank 9 and the regeneration solvent tank 10 is removed by wiping or the like, and the solvent residual liquid in the apparatus is put into the pipe 30 which is a solvent flow path. It is connected to the drain plug 60 provided, the drain plug 61 provided in the liquid level adjuster 17, the drain plug 62 provided in the condenser 21, the drain plug 63 provided in the moisture adsorber 22, and the distillation pot 18. The drain plug 65 provided in the waste liquid tank 20 and the drain plug 64 provided in the pipe 56 are opened, and the solvent residual liquid is taken out.
[0020]
The residual solvent can be drained by opening the drain plugs as the draining means and collecting the residual liquid to be dropped in a container. Ejector-type suction and recovery devices are connected to the drain stoppers in order. It constitutes a drawing means, and the residual liquid in the solvent flow path including each device can be discharged from each drain plug 60, 61, 62, 63, 64, 65. This is preferable in that it can be completely discharged. Instead of connecting the suction recovery devices to each drain plug in order, a suction recovery device may be provided for each drain plug 60 to 65, or a suction recovery device is provided in common for each drain plug. May be.
[0021]
An ejector-type suction recovery device refers to a device that recovers a residual liquid by an ejector effect caused by jet energy such as compressed air, and an example thereof is shown in FIG.
In FIG. 4, compressed air or the like is jetted from an inlet valve 68 into the ejector body 70 through a nozzle 69 in a supersonic flow, and drain plugs 67 of the ejector body 70 connected to the drain plugs 60 to 65 of the solvent regeneration device. Thus, the residual solvent is sucked into the ejector body 70 as an accompanying flow. The sucked residual liquid and the mixed liquid of the jet flow are discharged into the residual solvent recovery cylinder 71, the residual solvent liquid sucked is recovered from the recovery valve 73, and the compressed air and the like are discharged from the outlet valve 72. .
The extraction means may be constituted by connecting a suction blower or a vacuum pump to each drain plug 60 to 65 in addition to such an ejector type suction recovery device.
[0022]
After collecting the residual solvent, the valve 31 is closed and the valve 59 of the inert gas tank is opened. An inert gas such as nitrogen gas is supplied from the pipe 30 to the solvent filter 15, heat exchanger 16, liquid level adjuster 17, and still 18. In addition, the nitrogen gas is allowed to reach the pipes and equipment that serve as a flow path for the solvent in the apparatus, such as the conduit 32, the condenser 21, and the moisture adsorber 22, and the waste liquid tank 20 and each pipe. Then, the distribution channel is filled with nitrogen gas.
[0023]
By filling this distribution channel with inert gas such as nitrogen gas in this way, there is no risk of the solvent flammable gas mixing with the air and exploding, and it is safe from establishment to establishment that requires solvent regeneration. Will be able to move to.
In this embodiment, the regeneration of the cleaning solvent has been described. However, the present invention is not limited to the cleaning solvent, but can be similarly applied to the regeneration of a contaminated solvent or a reusable used solvent. It is.
[0024]
【The invention's effect】
As described above, the mobile solvent regenerator according to the present invention includes a contaminated solvent tank that stores a contaminated solvent in which a contaminated component is dissolved, a distillation pot that heats and distills the contaminated solvent supplied from the contaminated solvent tank, and A condenser that liquefies and regenerates by cooling the solvent vaporized in the distillation kettle with cooling water and a regenerated solvent tank that stores the regenerated solvent are installed in the cargo compartment of a moving vehicle and are operatively piped. Means for extracting the residual liquid of the solvent remaining after the regeneration of the solvent in the flow path of the solvent in the apparatus such as the distillation pot, the condenser or the pipe, and an inert gas for substituting the inert flow in the flow path. Since it comprises an active gas supply means, after use of the solvent regeneration device, the solvent flow path can be replaced with an inert gas after the residual liquid is removed, and the solvent can be replaced by an inert gas. May explode Safely can be moved, factories, sales offices, there is a beneficial effect to ensure that is depending on the reduction of industrial waste at a low cost to the demand for solvent regeneration, such as power plants.
[0025]
In addition, the recycled solvent tank has a structure that can quantitatively measure, and it is a quantitative measuring device with a simple structure without the need for sensors such as level meters and metering meters. There is no low cost, no worry of failure, and no maintenance is required.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a mobile vehicle showing an embodiment of the present invention.
FIG. 2 is a horizontal sectional plan view of the mobile vehicle of FIG.
FIG. 3 is a piping flow diagram of a cleaning solvent regenerator showing an embodiment of the present invention.
FIG. 4 is a schematic diagram of an ejector-type suction recovery device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mobile vehicle 2 Cargo compartment 3 Partition plate 4 枡 5 Communication port 6 Regenerator main body 7 Cooler 8 Inert gas tank 9 Contaminated solvent tank 10 Regenerated solvent tank 15 Solvent filter 16 Heat exchanger 17 Liquid level adjuster 18 Distilling pot 19 Oil Heater 20 Waste liquid tank 21 Condenser 22 Moisture adsorber 70 Ejector body 71 Residual solvent recovery cylinder

Claims (2)

A contaminated solvent tank for storing a contaminated solvent in which dirt components are dissolved;
A distillation still for heating and distilling the contaminated solvent supplied from the contaminated solvent tank;
A condenser that liquefies and regenerates the solvent vaporized in the distillation kettle by cooling with cooling water;
A regenerated solvent tank for storing regenerated solvent is installed in the cargo compartment of a moving vehicle and operatively piped, and the solvent is regenerated in the solvent flow path in the apparatus such as the distillation tank, the condenser and the pipe. Extraction means for extracting residual liquid of the solvent remaining after,
An inert gas supply means for replacing the flow path of the solvent in the apparatus with an inert gas;
The regenerated solvent tank is partitioned into first to Nth ridges adjacent to each other by a partition plate having a communication port at a predetermined height, and the regenerated solvent is poured into the first tub and sequentially communicated with the adjacent tubs. A mobile solvent regeneration apparatus characterized in that a predetermined amount of a regeneration solvent which is stored through a mouth and determined by the height of the communication port is measured and stored in each basket .   The movable type of claim 1, comprising an ejector-type suction recovery device as extraction means for extracting residual solvent remaining after solvent regeneration in a solvent flow path in the apparatus such as a distillation pot, condenser or piping. Solvent regenerator.

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