JPH0661540B2 - Solvent vapor recovery device and solvent vapor recovery attachment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a solvent vapor recovery device and a solvent vapor recovery attachment, and is a device that can effectively prevent harmful solvent vapor from leaking into the atmosphere. It is about.

[Conventional technology]

In the conventional solvent vapor cleaning apparatus, the solvent vapor is prevented from leaking into the atmosphere by collecting the solvent vapor with a cooling coil or a liquid curtain provided around the cleaning tank.

[Problems to be Solved by the Invention]

However, these conventional methods cannot collect all the solvent vapors, and it is inevitable that a part of the solvent vapors leaks out of the apparatus from the inlet / outlet of the object to be cleaned.

The present invention is intended to solve this conventional problem, and an object thereof is to provide a solvent vapor recovery device and a solvent vapor recovery attachment capable of completely preventing leakage of solvent vapor into the atmosphere. To do.

[Means for Solving the Problems]

The present invention provides a suction port and a discharge port of an air curtain at the inlet / outlet of an object to be cleaned of a solvent vapor cleaning device to shield the inlet / outlet with an air curtain, and collects solvent vapor in communication with the suction port and the outlet. In a solvent vapor recovery device that is provided with a section and recovers the solvent in the solvent vapor recovery unit, a gas containing solvent vapor is directed to the suction port from the discharge port and the solvent vapor cleaning device into the solvent vapor recovery unit. A suction fan for forming an air curtain to be sent out, and a nozzle and a cooler are provided in the solvent vapor recovery unit, and a pump, a cooling device, and the nozzle are provided at an outlet of a solvent liquid storage unit of the solvent vapor recovery unit. A solution circulation path communicating with the above is formed, and the solvent vapor sent from the suction fan is cooled and liquefied.

The present invention is a solvent vapor recovery attachment, which is attached to an inlet / outlet of an object to be cleaned of a solvent vapor cleaning device, and a solvent vapor recovery device for cooling and recovering solvent vapor, collecting solvent vapor leaking from the inlet / outlet. An attachment for collecting solvent vapor to be sent out, wherein a pair of opposed walls of a rectangular box is provided with an inlet / outlet of an object to be cleaned, and an inlet of an air curtain is provided on one of the other opposed pair of walls, and the other is provided on the other. An air curtain discharge port is provided in the air intake, an attachment in which a fan for generating an air curtain is disposed at the suction port, and a gas cooling chamber having a solvent vapor intake chamber and a cooler are separated by a wall body, and a lower portion thereof is used to store a solution. And a nozzle is provided in the solvent vapor intake chamber, the solution in the solvent reservoir is jetted from the nozzle by a pump to cool and liquefy the solvent vapor, and the solution vapor intake chamber and Each of the gas cooling chambers is provided with a solvent vapor recovery device connected to the air curtain discharge port and the suction port of the attachment.

[Action]

In the solvent vapor recovery apparatus of the present invention, the inlet and outlet of the object to be cleaned of the solvent vapor cleaning apparatus are shielded by the air curtain, so that the solvent vapor does not leak from the inlet and outlet of the object to be cleaned of the solvent vapor cleaning apparatus to the atmosphere. Further, since the inlet of the closed solvent vapor recovery device is connected to the suction port of the air curtain and the outlet of the solvent vapor recovery device is connected to the discharge port of the air curtain, an air curtain gas accompanied by solvent vapor ( For example, air) is introduced into the solvent vapor recovery device, and the solvent vapor is separated and recovered. At this time, even if the solvent vapor is not completely separated and recovered and remains, the solvent vapor can be circulated in the closed path together with the gas for the air curtain, so that the solvent vapor does not leak into the atmosphere and is separated while being repeatedly circulated. Be recovered. Therefore, the solvent vapor does not leak to the atmosphere and can be recovered and reused. A fan for generating an air curtain is provided at the suction port, and a cooling device is provided in the solvent vapor recovery section at a position downstream of the fan in the solvent vapor flow direction. This cooling device cools the nozzles. Since the solvent vapor sent from the suction fan is cooled by the fluid and liquefied, the pressure difference across the fan can be reduced.
High efficiency can be obtained.

Further, the solvent vapor recovery attachment of the present invention is a solvent vapor recovery attachment that is attached to the inlet / outlet of the object to be cleaned of the cleaning device that uses a solvent such as a solvent vapor cleaning device, and is connected to the solvent vapor recovery device. A rectangular box with upper and lower walls provided with entrances and exits for the objects to be cleaned
On one of the side walls of the set, the intake of the air curtain, on the other,
An attachment equipped with an air curtain discharge port and an air curtain generation fan at the suction port, and a nozzle provided in a solvent gas intake chamber communicating with the gas cooling chamber to eject the solution in the solvent reservoir by a pump Along with cooling and liquefying the vapor, the solvent vapor intake chamber and the gas cooling chamber are provided with a solvent vapor recovery device that is connected to the air curtain discharge port and the suction port of the attachment, respectively, so that the solvent vapor is liquefied. It is easy to install an air curtain that is accurate and highly efficient, and can be downsized as a whole, and the solvent vapor cleaning device and solvent vapor recovery device can be installed easily, The device can prevent the leakage into the atmosphere and can recover the solvent. Then, the solvent vapor sucked from the inlet and outlet by the fan and sent to the solvent vapor recovery device is cooled by the cooling device and condensed (liquefied), so that the pressure of the solvent vapor recovery device, that is, the pressure difference before and after the fan is small. Becomes
High efficiency can be obtained.

〔Example〕

 Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of claim 1, wherein 1 is a rigid solvent vapor cleaning tank having a rectangular cross section (hereinafter referred to as cleaning tank), and 2 is an outer tank.

Inside the cleaning tank 1, a solvent vapor generator 3 is provided in the lower part, a solvent vapor cleaner 4 is provided in the middle, and a heater 6 is provided in the solvent vapor generator 3 to form a solvent vapor cleaner. . An ultrasonic vibration generator 5 is installed in the solvent vapor generator 3.
May be provided to serve also as the ultrasonic cleaning device.

The tank wall of the cleaning tank 1 has a heat insulating structure, and the ceiling wall is provided with an entrance / exit 8 for the article to be cleaned 7. The entrance / exit 8 is provided with an automatic lid 9 synchronized with the entrance / exit of the object to be cleaned 7.

The side wall 10 of the four side walls of the cleaning tank 1 is sufficiently separated from the inlet / outlet port 8 and extends to the height just above the solvent vapor cleaning section 4 in the horizontal direction of the side wall 10 and the full width thereof. Then, a suction port 11 in which a long hole or a large number of holes are arranged is provided so as to suck the air curtain gas accompanied by the solvent vapor.

The side wall 12 facing the side wall 10 has a height h2 smaller than a height width h1 of the suction port 11 at a position facing the suction port 11.
The discharge port 13 is provided in the same manner as the suction port 11. The suction port 11 is provided with an air curtain generation fan 14 such as a cross flow fan. The gas is strongly sucked from the suction port 11 and blown out from the opposing discharge port 13 to blow the air curtain 15 above the solvent vapor cleaning unit 4. Is formed to completely prevent the solvent vapor of the solvent vapor cleaning unit 4 from flowing into the inlet / outlet 8.

Reference numeral 16 denotes an air flow guide plate, which is provided inside the suction port 11.

The outer tub 2 is a closed tub that forms a solvent vapor recovery unit, which is provided by forming an appropriate space between the four tub side walls and the bottom wall of the cleaning tub 1, and includes a suction port 11 and a discharge port. The inside of the cleaning tank 1 and the upper inside of the outer tank 2 are provided so as to communicate with each other via the outlet 13.

The solvent vapor recovery section is partitioned by a partition 19 into a chamber 17 that communicates with the suction port 11 and a chamber 18 that communicates with the suction port of the air curtain generating fan 14, and the partition 19 is divided between the cleaning tank 1 and the outer tank 2. The chambers 17 and 18 are provided only between the side walls and communicate with each other at the bottom of the outer tank 2 below the cleaning tank 1.
In addition, the chambers 17 and 18 are provided on both sides of the cleaning tank 1 so that
Alternatively, the cleaning tank 1 may be divided into 17,18. In that case, the partition 19 is unnecessary.

The chambers 17 and 18 are provided with a cooling device for condensing (or solidifying) the solvent vapor. A cooling coil, a cooling fluid discharge device, or the like is used as the cooling device. In this embodiment, the chamber 17 is provided with a large number of nozzles 21 for ejecting the cooling fluid, and the chamber 18 is provided with a cooling coil 28. The bottom of the solvent vapor recovery section serves as a storage section 22 for the condensed solvent, and the liquid level thereof is adjusted so that the chambers 17 and 18 communicate with each other in the vapor phase sections. Reference numeral 23 is a solvent outlet.

The cooling fluid supplied from the nozzle 21 may be gas or liquid, but in this embodiment, the nozzle 21 and the solvent outlet 23 are connected to the pump 24, the separator 25, and the cooling device 2.
The same solvent liquid that has been cooled is used by connecting with the solvent circulation path 27 provided with 6.

Reference numeral 29 denotes a solvent supply path for supplying a solvent to the cleaning tank 1, which is provided with a water separator 30 and is branched from the solvent circulation path 27.

According to this embodiment, the outer wall surface of the cleaning tank 1 of the solvent vapor cleaning apparatus is used as a partition wall to define the chambers 17, 18 of the solvent vapor recovery section, so that downsizing can be achieved, and piping and the like can be omitted. Can be shortened. Then, the fan 14 is arranged at the suction port 11, and the solvent vapor sucked from the port 8 by the fan 14 and sent into the chambers 17 and 18 is cooled and liquefied by the solvent injected from the nozzle 21 or the like. Therefore, the volume of the solvent vapor is reduced in the chambers 17 and 18, the pressure difference between the front and the rear of the fan 14 is reduced, and high efficiency is obtained.

The air curtain generating fan 14 may be provided at both the suction port 11 and the discharge port 13, but in that case, the fan of the suction port 11 has a larger flow rate than the fan of the discharge port 13. Is preferred.

3 to 5 show an example of the solvent vapor recovery attachment attached to the solvent vapor cleaning apparatus of claim 2.

In FIG. 3, 31 is an attachment for collecting solvent vapor (hereinafter referred to as an attachment), which is composed of a rectangular box.
An inlet / outlet port 32 for the object to be cleaned is provided on the upper wall, and an inlet / outlet port 36 for the object to be cleaned is provided on the lower wall.

One side wall of the pair of facing side walls of the attachment 31 has an air curtain gas suction port 37 on one side wall, and an air curtain gas discharge port 38 on the other side wall at a position close to the lower wall, respectively. It is provided along the side wall.

Reference numeral 33 is a cleaning tank having a solvent vapor cleaning section inside and an inlet / outlet port 34 of the object to be cleaned on the upper portion. The attachment 31 is attached to the inlet / outlet port 34 of the cleaning tank 33 on the lower wall of the attachment 31.
An attachment portion 35 for attaching the attachment 31 to the cleaning tank 33 is provided in a state in which the inlet and outlet 36 are combined.

A suction fan 39 for generating an air curtain is provided at the suction port 37, and an air curtain 40 is formed in the attachment 31. Suction port 37, suction fan 3
The outlets 9 are connected to the outlets and inlets of the closed solvent vapor recovery device 41, respectively.

FIG. 4 shows the above-mentioned attachment 31 provided in an automatic machine 42 having an inlet for the object to be cleaned on one side end wall and an outlet for the other side end wall and a cleaning device for generating solvent vapor inside. In the example, 43 is an inlet (or an outlet) of the automatic machine 42. 64
Is an air flow guide plate. Attachment 31 is automatic machine 4
Of course, it is preferable to provide both at the entrance and the exit of the two.

As the solvent vapor recovery device 41 provided in these attachments 31, a device is used in which the solvent vapor is cooled and condensed (or solidified), separated from the air curtain gas, and the condensed solvent is recovered. A preferred example is shown in the figure.

The solvent vapor recovery tank 44 (hereinafter abbreviated as a recovery tank) is divided into left and right by a partition wall 45, and one of the solvent vapor intake chambers 46 has a suction pipe 47 for the air curtain gas accompanied by the solvent vapor at the upper part,
To the other gas cooling chamber 48, discharge pipes 49 for the air curtain gas from which the solvent vapor has been separated are connected at the upper part.

The partition wall 45 is provided so as to be spaced apart from the bottom wall of the recovery tank 44, and the storage portion 5 for the condensed solvent liquid is provided at the bottom of the recovery tank 44.
0, a communication reversing section 51 for reversing the gas from the solvent vapor intake chamber 46 to the gas cooling chamber 48 is formed. Reservoir
A solvent recovery passage 52 including a pump 53 and a filtration device 54 is connected to the valve 50 to recover the solvent.

The solvent vapor intake chamber 46 is provided with a cooling device for condensing or solidifying the sucked solvent vapor. In this example, a large number of nozzles 55 are provided in the solvent vapor intake chamber 46.
The fifth group is connected to a solvent ejection passage 56 branched from the solvent recovery passage 52 to eject the cooled solvent in the storage portion 50 into the room to cool the solvent vapor. The cooler 57 in which the cooling fluid is passed is immersed.
Further, the gas cooling chamber 48 is provided with a nozzle 55, a filter 58, and a cooler 59 through which a cooling fluid is passed, so as to condense the solvent vapor that has not condensed in the solvent vapor intake chamber 46 and remove foreign substances entrained. Is done.

60 is a suction fan, 61 is a discharge fan, 62 is a straightening plate,
63 is a solvent supply path.

〔The invention's effect〕

The solvent vapor recovery device of the present invention shields the inlet and outlet of the object to be cleaned of the solvent vapor cleaning device with an air curtain, and connects the inlet of the closed solvent vapor recovery device to the suction port of the air curtain,
The outlet of the solvent vapor recovery device is connected to the discharge port of the air curtain, and a fan for generation is arranged at the suction port, and the solvent vapor sent to the solvent vapor recovery device by this fan is cooled by a cooling device. Since it is liquefied, a high efficiency can be obtained in forming the air curtain, and the air curtain gas accompanied by the solvent vapor does not leak to the atmosphere. Therefore, the solvent vapor does not leak to the atmosphere and can be recovered and reused.

The solvent vapor recovery attachment of the present invention is a solvent vapor recovery attachment that is attached to the inlet / outlet of an object to be cleaned such as a cleaning device that generates solvent vapor and is connected to a solvent vapor recovery device that includes a solvent vapor cooling device. The upper and lower walls of the rectangular box are provided with inlets and outlets for the objects to be cleaned, and one of the pair of side walls facing each other is provided with an inlet for the air curtain.
On the other hand, a solution in the solvent reservoir is pumped out from an attachment equipped with an air curtain discharge port and an air curtain generation fan at the suction port, and a nozzle provided in a solvent gas intake chamber communicating with the gas cooling chamber. Along with cooling and liquefying the solvent vapor, the solvent vapor intake chamber and the gas cooling chamber are provided with a solvent vapor recovery device that is connected to the air curtain discharge port and the suction port of the attachment, respectively. For a solvent vapor cleaning device of the type that vapor leaks into the atmosphere or may leak, it is possible to easily form a highly efficient air curtain with proper liquefaction of solvent vapor and simple installation. Thus, it is possible to provide an apparatus in which there is no risk of solvent vapor leaking into the atmosphere.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of a solvent vapor recovery apparatus, FIG. 2 is a cross-sectional plan view taken along the line I--I of FIG. 1, FIG. 3 and FIG. FIG. 5 is a vertical sectional view of the recovery tank 44 in a used state. DESCRIPTION OF SYMBOLS 1 ... Cleaning tank, 2 ... Outer tank, 3 ... Solvent vapor generation part, 4 ... Solvent vapor cleaning part, 5 ... Ultrasonic vibration generator, 6 ... Heater, 7 ... Cleaning object, 8 ... Door, 9 ... Automatic lid ,
10 ... Side wall, 11 ... Suction port, 12 ... Side wall, 13 ... Discharge port, 14 ... Air curtain generation fan, 15 ... Air curtain, 16 ... Airflow guide plate, 17 ... Chamber, 18 ... Chamber, 19
... Partition wall, 21 ... Nozzle, 22 ... Reservoir, 23 ... Withdrawal port, 24 ... Pump, 25 ... Passing device, 26 ... Cooling device,
27 ... Solvent circulation path, 28 ... Cooling coil, 29 ... Solvent supply path, 30 ... Water separator, 31 ... Attachment, 32 ... Inlet / outlet, 33 ... Wash tank, 34 ... Inlet / outlet, 35 ... Mounting part, 3
6 ... Port, 37 ... Suction port, 38 ... Discharge port, 39 ... Suction fan, 40 ... Air curtain, 41 ... Solvent vapor recovery device, 42 ... Automatic machine, 43 ... Inlet, 44 ... Recovery tank, 45 ...
Partition wall, 46 ... Solvent vapor intake chamber, 47 ... Suction pipe, 48 ... Gas cooling chamber, 49 ... Discharge pipe, 50 ... Storage part, 51 ... Inversion part, 52 ... Solvent recovery passage, 53 ... Pump, 54 ... Passing device, 55 ... Nozzle, 56 ... Solvent ejection passage, 57 ... Cooler,
58 ... Filter, 59 ... Cooler, 60 ... Suction fan, 6
DESCRIPTION OF SYMBOLS 1 ... Discharge fan, 62 ... Rectifier plate, 63 ... Solvent supply path, 6
4 ... Airflow guide plate.

Claims (2)

[Claims] 1. A solvent vapor in which a suction port and a discharge port of an air curtain are provided at the inlet and outlet of an object to be cleaned of a solvent vapor cleaning device to shield the inlet and outlet with an air curtain, and which communicates with the suction port and the discharge port. In a solvent vapor recovery device provided with a recovery part, so that the solvent is recovered in the solvent vapor recovery part, a gas containing solvent vapor is introduced into the solvent vapor recovery part from the discharge port and the solvent vapor cleaning device into the suction port. A suction fan for forming an air curtain to be sent toward is disposed, and a nozzle and a cooler are provided in the solvent vapor recovery unit, and a pump, a cooling device, and the outlet are provided in a solvent liquid storage unit of the solvent vapor recovery unit. A solvent vapor recovery apparatus, characterized in that a solution circulation path communicating with a nozzle is formed and the solvent vapor sent out from the suction fan is cooled and liquefied. 2. A solvent vapor recovery device, which is attached to an inlet / outlet port of an object to be cleaned of a solvent vapor cleaning device and collects and sends out solvent vapor leaking from the inlet port to a solvent vapor recovery device for cooling and recovering the solvent vapor. An attachment, in which a pair of opposing walls of a rectangular box are provided with inlets and outlets for the objects to be cleaned, one of the other opposing pair of walls has an air curtain inlet port, and the other has an air curtain outlet port. An attachment in which a fan for generating an air curtain is arranged at the suction port, and a gas cooling chamber having a solvent vapor intake chamber and a cooler are separated by a wall, and the lower portion thereof serves as a solution storage portion, and the solvent A nozzle is provided in the vapor intake chamber, and the solution in the solvent reservoir is jetted from the nozzle by a pump to cool and liquefy the solvent vapor. Attachment for collecting solvent vapor, comprising a solvent vapor recovery device connected to an air curtain discharge port and a suction port of the instrument.