JPH024491A - Solvent vapor recovery equipment and attachment for solvent vapor recovery - Google Patents

Abstract

PURPOSE:To separate and recover solvent vapor by shielding the entrance of a material to be scrubbed in a solvent vapor scrubber with an air curtain and stopping leak of solvent vapor to the atmosphere and connecting the outlet of a solvent vapor recovery equipment with the discharge port of the air curtain. CONSTITUTION:In a solvent vapor scrubber equipped with a generation part 3 of solvent vapor and a scrubbing part 4, the entrance 8 of a material 7 to be scrubbed is shielded by an air curtain 15 and also the inlet of a closed solvent vapor recovery equipment is connected with the suction port 11 of the air curtain 15 and the outlet of the above-mentioned recovery equipment is connected with the discharge port 13 of the air curtain 15. Thereby solvent vapor is prevented from being leaked from the scrubber and simultaneously the solvent vapor accompanied with gas for the air curtain is separated and recovered in the recovery equipment. At this time, even when solvent vapor is not completely separated and recovered and remains, solvent vapor is not leaked into the atmosphere owing to circulation of a closed route.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solvent vapor recovery device and an attachment for recovering solvent vapor, and in particular to a device that can effectively prevent the leakage of harmful solvent vapor into the atmosphere. It is related to.

[Conventional technology]

In conventional solvent vapor cleaning equipment, leakage of the solvent vapor into the atmosphere is prevented by collecting the solvent vapor using a cooling coil or a hydraulic tensioner provided around the cleaning tank.

[Problem to be solved by the invention]

However, with these conventional methods, it is not possible to collect all of the solvent vapor, and it is inevitable that some solvent vapor will leak out of the apparatus from the inlet and outlet of the object to be cleaned.

The present invention attempts to solve this conventional problem, and aims to provide a solvent vapor recovery device and an acnotiment for solvent vapor recovery that can completely prevent leakage of solvent vapor into the atmosphere. It is something to do.

[Means to solve the problem]

In the solvent vapor recovery device according to claim 1 of the present invention, the entrance and exit of the object to be cleaned of the solvent vapor cleaning device is shielded with an air curtain, the inlet of the sealed solvent vapor recovery device is connected to the suction port of the air curtain, and the The present invention is characterized in that an outlet of the solvent vapor recovery device is connected to a discharge port of the air curtain.

The solvent vapor recovery device according to claim 2 of the present invention has an air curtain suction port on the side wall of the solvent vapor cleaning device, which has an inlet/outlet for the object to be cleaned at the upper part and a solvent vapor generating section and a solvent vapor cleaning section inside. and a discharge port, and the inlet and exit ports are shielded with an air curtain, and a closed solvent vapor recovery section that communicates with the suction port and the discharge port is provided on the outer wall of the solvent vapor cleaning device,
The solvent vapor recovery section includes a cooling device for condensing or solidifying the solvent vapor, an outlet for extracting the condensed or solidified solvent, and a clean gas from which the solvent vapor has been recovered is made to flow from the discharge port toward the suction port. and an air curtain generation fan forming the air curtain.

The attachment for solvent vapor recovery of the present invention is an acnottiment for solvent vapor recovery that is attached to the entrance/exit of an object to be cleaned in a solvent vapor cleaning apparatus and connected to a closed solvent vapor recovery apparatus, and is an acnotiumment for recovering solvent vapor that is attached to the top wall of a rectangular box body and connected to a closed solvent vapor recovery apparatus. The lower wall is equipped with an entrance and exit for the object to be cleaned, one of the opposing 1 m side walls is equipped with an air curtain suction port, and the other side is equipped with an air curtain discharge port,
The present invention is characterized in that at least one of the suction port and the discharge port is provided with an air curtain generation fan.

[For production]

In the solvent vapor recovery device according to claim 1 of the present invention, the entrance and exit of the object to be cleaned of the solvent vapor cleaning device is shielded with an air curtain, so that the solvent vapor does not leak into the atmosphere from the entrance and exit of the object to be cleaned of the solvent vapor cleaning device. Never. Furthermore, since the inlet of the hermetically sealed solvent vapor recovery device was connected to the suction port of the air curtain, and the outlet of the solvent vapor recovery device was connected to the discharge port of the air curtain, the air curtain gas ( For example, air) is led to a 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, it is circulated in a closed path together with the air curtain gas, so the solvent vapor will not leak into the atmosphere, and will be separated and recovered as it is repeatedly circulated. Ru. Therefore, the solvent vapor does not leak into the atmosphere and can be recovered and recycled for use.

The solvent vapor recovery device according to claim 2 of the present invention has an air curtain suction on the side wall of the solvent vapor cleaning device, which has an entrance/exit for the object to be cleaned at the upper part and is equipped with a purifying agent vapor generating section and a solvent vapor cleaning section inside. an inlet and an outlet, the inlet and outlet are shielded with an air curtain, and an airtight solvent vapor recovery section communicating with the inlet and the outlet is provided on the outer wall of the solvent vapor cleaning device;
The solvent vapor recovery section includes a cooling device for condensing or solidifying the solvent vapor, an outlet for extracting the condensed or solidified solvent, and a clean gas (e.g., air) from which the solvent vapor is recovered from the discharge port to the suction port. Since an air curtain generation fan is provided to form the air curtain by causing air flow toward the solvent vapor cleaning device, the air curtain can be installed in the solvent vapor cleaning device, and the solvent vapor cleaning device and the solvent vapor recovery There is no need to connect the parts with piping or other means. Therefore, it is possible to realize a compact solvent vapor recovery device that exhibits the effects as described in claim 1.

The solvent vapor recovery unit attachment of the present invention is an attachment for solvent vapor recovery that is attached to the entrance/exit of an object to be cleaned of a cleaning device using a solvent such as a solvent vapor cleaning device, and is read directly from the solvent vapor recovery device, and has a rectangular shape. The upper and lower walls of the box body are provided with entrances and exits for objects to be cleaned, and one of a pair of opposing side walls is provided with an air curtain suction port, and the other side is provided with an air curtain discharge port. Since at least one of the discharge ports is equipped with an air curtain generation fan, one of the ports of the attachment for solvent vapor recovery is designed to prevent solvent vapor from leaking into the atmosphere from the inlet/outlet of the object to be cleaned or leaking. Connect the suction port of the solvent vapor recovery attachment to the inlet of the solvent vapor recovery device, and the outlet port of the solvent vapor recovery attachment to the entrance and exit of the object to be cleaned in a type of solvent vapor cleaning device that is likely to cause By connecting to the respective outlets, leakage of solvent vapor into the atmosphere can be prevented and the solvent can be recovered. Therefore, the solvent vapor cleaning apparatus of the type in which the solvent vapor leaks into the atmosphere or has the risk of leaking can be changed to an apparatus in which there is no risk of solvent vapor leaking into the atmosphere.

In addition, if the solvent vapor recovery device to be installed has a high recovery rate and the gas (e.g. air) from which the solvent vapor is separated can be released into the atmosphere as it is, the outlet of the acnotium for solvent vapor recovery and the solvent vapor recovery device. There is no need to connect the outlet of the solvent vapor recovery attachment to the outlet of the solvent vapor recovery attachment.

〔Example〕

Embodiments of the present invention will be described using the drawings.

FIG. 1 shows an embodiment of claim 1.2, where l is a vertical solvent vapor cleaning tank (hereinafter abbreviated as cleaning tank) with a square cross section, and 2 is an outer tank.

Inside the cleaning tank 1, a solvent vapor generating section 3 is provided in the lower part, a solvent vapor cleaning section 4 is provided in the middle part, and a heater 6 is provided in the solvent vapor generating section 3, forming a solvent vapor cleaning device. . Note that an ultrasonic vibration generating device 5 may be provided in the solvent vapor generating section 3 to serve as an 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 8 for the objects 7 to be cleaned. The entrance/exit 8 is equipped with an automatic lid 9 synchronized with the entry/exit of the object 7 to be cleaned.

A side wall 10 of the four side walls of the cleaning tank 1 has an entrance/exit 8.
at a sufficient distance from and at a height directly above the solvent vapor cleaning section 4, extending in the horizontal direction of the side wall 10 and over its entire width,
A suction port 11 for air curtain gas accompanied by solvent vapor is provided, which is formed by a long hole or a plurality of holes arranged side by side.

The side wall 12 facing the side wall 10 has a height width h2 smaller than the height width h1 of the suction port 11 at a position facing the suction port 11.
Air curtain gas discharge port 13 from which solvent vapor is separated
is provided in the same way as the suction port 11. Suction port 1
1 includes an air curtain generating fan 14 such as a cross-flow fan.
An air curtain 15 is formed above the solvent vapor cleaning section 4 by strongly sucking in gas from the suction port 11 and blowing it out from the opposing discharge port 13. It is designed to completely prevent the water from flowing into the air.

16 is an airflow guide plate provided inside the suction port 11.

The outer tank 2 is a closed tank that forms a solvent vapor recovery section, and is connected to the cleaning tank 1 by forming an appropriate space between the four tank side walls and between the bottom walls. The inside of the cleaning tank 1 and the inside upper part of the outer tank 2 are provided in communication with each other via the outlet 13.

The solvent vapor recovery section is divided by a partition wall 19 into a chamber 17 communicating with the suction port 11 and a chamber 18 communicating with the suction port of the air curtain generation fan 14. They are provided only between them, and the chambers 17 and 18 are communicated with each other at the bottom of the outer tank 2 below the cleaning tank 1. In addition, chambers 17 and 18 are provided on both sides of the cleaning tank 1, and chamber 1
7.18 can also be divided into cleaning tanks 1.

In that case, the partition wall 19 is not necessary.

Chambers 17,18 are provided with a cooling device for condensing (or solidifying) the solvent vapor. As the cooling device, a cooling coil, a cooling fluid discharge device, etc. are used, and in this embodiment, the chamber 17 is provided with a number of nozzles 21 that eject cooling fluid, and the chamber 18 is provided with a cooling coil 28. . The bottom of the solvent vapor recovery section becomes a storage section 22 for condensed solvent.
The liquid level is adjusted so that chambers 17 and 18 communicate with each other in the gas phase. 23 is a solvent outlet.

The cooling fluid supplied from the nozzle 21 can be either gas or liquid, but in this embodiment, the nozzle 21 and the solvent outlet 23 are connected to a solvent circulation path 27 equipped with a pump 24, a filter device 25, and a cooling device 26. and the same cooled solvent solution is used.

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

In addition, the suction port 11 is used as the air curtain generation fan 14.
Although a suction fan is provided at the outlet 13, a discharge fan may be provided at the outlet 13, or a fan may be provided at both. In that case, it is preferable to use a fan at the suction port 11 with a larger flow rate than the fan at the discharge port 13.

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

In Fig. 3, 31 is a solvent vapor recovery attachment (hereinafter abbreviated as attachment) consisting of a rectangular box.
An entrance/exit 32 for the object to be cleaned is provided in the earthen wall, and an entrance/exit 36 for the object to be cleaned is provided in the lower wall.

Of a pair of opposing side walls of the attachment 31, an air curtain gas suction port 37 is provided on one side wall, and an air curtain gas discharge port 38 is provided on the other side wall at a position close to the lower wall. It is installed in the middle of the side wall.

Reference numeral 33 denotes a cleaning tank which has a solvent vapor cleaning section inside and an entrance/exit port 34 for objects to be cleaned at the top.
A mounting portion 35 is provided to attach the attachment 31 to the cleaning tank 33 with the entrance and exit port 36 of the cleaning tank 33 aligned.

A suction fan 39 for generating an air curtain is provided at the suction port 37 to form an air curtain 40 within the attachment 31. Suction port 37, suction fan 3
The outlet ports 9 are connected to the outlet and inlet of the hermetically sealed solvent vapor recovery device 41, respectively. Note that a discharge fan may be provided at the discharge port 38 instead of the suction fan 39, or both may be provided.

Fig. 4 shows the above-mentioned Acutimen) 31 installed in an automatic machine 42, which has an inlet for the object to be cleaned on one end wall, an outlet on the other end wall, and a cleaning device that generates solvent vapor inside. In the above example, 43 is the entrance (or exit) of the automatic machine 42. 6
4 is an airflow guide plate. It goes without saying that the attachment 31 is preferably provided at both the entrance and exit of the automatic machine 42.

As the solvent vapor recovery device 41, a device is used that cools and condenses (or assimilates) the solvent vapor, separates it from the air curtain gas, and recovers the condensed solvent.
A preferred example is shown in the figure.

The solvent vapor recovery tank (hereinafter abbreviated as recovery tank) 44 is partitioned into left and right by a partition wall 45. One chamber 46 has an air curtain gas suction pipe 47 containing solvent vapor at the top, and the other chamber 46 has a A discharge pipe 49 for an air curtain gas from which solvent vapor is separated is connected to the upper part of each of the cylinders.

The partition wall 45 is provided at a distance from the bottom wall of the recovery tank 44, and the bottom of the recovery tank 44 includes a storage section 50 for condensed solvent and an inversion section 51 for inverting the gas from the chamber 46 to the chamber 48. It is formed. A solvent recovery path 52 equipped with a pump 53 and a filtration device 54 is connected to the storage section 50 to recover the solvent.

The chamber 46 is provided with a cooling device for condensing or solidifying the sucked solvent vapor, and in this example, a nozzle 55 is provided in the chamber 46.
A large number of nozzles 55 are provided, and a group of nozzles 55 is connected to a solvent jetting path 56 branched from the solvent recovery path 52, so that the cooled solvent in the storage section 50 is jetted into the room to cool the solvent vapor, A cooler 5 through which a cooling fluid flows is provided in the storage section 50.
7 is immersed in tH. The chamber 48 is provided with a nozzle 55, a filler 58, and a cooler 59 that supplies cooling fluid.
The solvent vapor that has not condensed in the chamber 46 is condensed and the entrained foreign matter is removed.

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

〔Effect of the invention〕

In the solvent vapor recovery device according to claim 1 of the present invention, the entrance and exit of the object to be cleaned of the solvent vapor cleaning device is shielded with an air curtain, the inlet of the sealed solvent vapor recovery device is connected to the suction port of the air curtain, and the Since the outlet of the solvent vapor recovery device is connected to the discharge port of the air curtain, the air curtain gas accompanied by the solvent vapor does not leak into the atmosphere. Therefore, the solvent vapor does not leak into the atmosphere and can be recovered and recycled for use.

The solvent vapor recovery device according to claim 2 of the present invention has an air curtain suction port on the side wall of the solvent vapor cleaning device, which has an inlet/outlet for the object to be cleaned at the upper part and a solvent vapor generating section and a solvent vapor cleaning section inside. and a discharge port, and the inlet and exit ports are shielded with an air curtain, and a closed solvent vapor recovery section that communicates with the suction port and the discharge port is provided on the outer wall of the solvent vapor cleaning device,
The solvent vapor recovery section includes a cooling device for condensing or solidifying the solvent vapor, an outlet for extracting the condensed or solidified solvent, and a clean gas from which the solvent vapor has been recovered to flow from the discharge port toward the suction port. Since at least the air curtain generating fan forming the air curtain is provided, it is possible to realize a compact solvent vapor recovery device that exhibits the effects as described in claim 1.

The solvent vapor recovery attachment of the present invention is a solvent vapor recovery attachment that is attached to the entrance and exit of an object to be cleaned, such as a cleaning device that generates solvent vapor, and is connected to the solvent vapor recovery device. The upper wall and the lower wall are provided with entrances and exits for the object to be cleaned, one of a pair of opposing side walls is provided with an air curtain suction port, and the other side is provided with an air curtain discharge port, and at least the suction port and the discharge port are provided. Since one side is equipped with an air curtain generation fan, it is possible to replace solvent vapor cleaning equipment of a type that leaks or has the risk of solvent vapor leaking into the atmosphere. It can be a device without any

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a solvent vapor recovery device, FIG. 2 is a sectional plan view taken along line 1-I in FIG. FIG. 5 is a vertical cross-sectional view of the collection tank 44 in a used state. DESCRIPTION OF SYMBOLS 1...Cleaning tank, 2...Outer tank, 3...Solvent vapor generating section, 4...Solvent vapor cleaning section, 5...Ultrasonic vibration generator, 6...Heater, 7. ...Object to be cleaned, 8...Inlet/outlet, 9...Automatic lid, 10...Side wall, 11...Suction port, 12...Side wall, 13...Discharge port, 14...
Air curtain generation fan, 15... air curtain,
16... Air flow guide plate, 17... Chamber, 18... Chamber, 19... Partition wall, 21... Nozzle, 22... Storage part, 23... Extraction port, 24... Pump, 25・
...Gathering device, 26... Cooling device, 27... Solvent circulation path, 28... Cooling coil, 29... Solvent supply path,
30... Water separator, 31... Attachment, 32
... Entrance/exit, 33... Washing tank, 34... Entrance/exit,
35... Mounting part, 36... Entrance/exit, 37... Suction port, 38... Discharge port, 39... Suction fan, 40...
... Air curtain, 41 ... Solvent vapor recovery device, 42
... Automatic machine, 43 ... Inlet, 44 ... Collection tank, 4
5... Partition wall, 46... Chamber, 47... Suction pipe, 48
... Chamber, 49 ... Discharge pipe, 50 ... Storage section, 51
...Reversing section, 52... Solvent recovery path, 53... Pump, 54... Filtration device, 55... Nozzle, 56...
- Solvent ejection path, 57... Cooler, 58... Filter, 59... Cooler, 60... Suction fan, 61
. . . Discharge fan, 62 . . . Current plate, 63 . . . Solvent supply path, 64 . Patent Applicant Kaiyo Denki Co., Ltd. Agent Patent Attorney Yakushi Minoru Agent Patent Attorney Yori 1) Takatsugu Department Agent Patent Attorney
Masayuki Takagi Figure 5

Claims (3)

[Claims] (1) The entrance and exit of the object to be cleaned of the solvent vapor cleaning device is shielded with an air curtain, the inlet of a sealed 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 air curtain. A solvent vapor recovery device characterized in that it is connected to a discharge port of. (2) An air curtain suction port and a discharge port are provided on the side wall of a solvent vapor cleaning device that has an entrance and exit port for the object to be cleaned at the top and is equipped with a solvent vapor generation section and a solvent vapor cleaning section inside. A closed solvent vapor recovery section that is shielded by an air curtain and communicates with the suction port and the discharge port is provided on the outer wall of the solvent vapor cleaning device, and the solvent vapor is condensed or solidified in the solvent vapor recovery section. a cooling device, an outlet for condensed or solidified solvent, and an air curtain generation fan that causes clean gas from which solvent vapor is recovered to flow from the discharge port toward the suction port to form the air curtain. A solvent vapor recovery device characterized by being provided with. (3) An attachment for solvent vapor recovery that is installed at the entrance and exit of the object to be cleaned in the solvent vapor cleaning device and connected to the solvent vapor recovery device, which has entrances and exits for the object to be cleaned on the upper and lower walls of the rectangular box. , an air curtain suction port is provided on one side of a pair of opposing side walls, an air curtain discharge port is provided on the other side, and an air curtain generation fan is provided on at least one of the suction port and the discharge port. An attachment for solvent vapor recovery characterized by: