JPS64962Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a distillation pot used in dry cleaning equipment for clothing, etc., and more specifically, to a method for recovering gaseous solvent accumulated in the distillation pot. This invention relates to a dry cleaning distillation pot equipped with a solvent recovery device.

[Conventional technology]

Conventional dry cleaning equipment, for example,
When starting the cleaning process, the cleaning solvent in the base tank 10 is supplied to the washing tank through the first solenoid valve 11, the pump 12, the second solenoid valve 13, the solvent filter 14 and the third solenoid valve 15. 16
Lead inward. During the washing process, the washing tub 16
Then, the solvent circulation path that returns the button trap 17, the fourth solenoid valve 18, the pump 12, the second solenoid valve 13, the solvent filter 14, and the third solenoid valve 15 to the washing tub 16 is closed, and the cleaning solvent is forcibly circulated. let
Note that the solvent filter 14 is normally of a cartridge type, such as a dry type or a paper type containing activated carbon, which traps fine impurities such as thread waste. In addition, button trap 17
consists of a coarse filter of about 10 to 15 meshes, and prevents relatively large impurities such as buttons, hardened or lighter particles separated from the laundry from entering the pump 12.

After the cleaning process, all the cleaning solvent in the washing tub 16 is removed by the button trap 17, the fourth solenoid valve 18, and the pump 12.
And through the fifth solenoid valve 19, the refined solvent is guided to the distillation pot 20 and condensed on the distillation condenser 21.
The water is returned to the base tank 10 through the water separator 22. During the drying process, the washing tub 16 is connected to the lint filter 23, the blower 24, the first shutter 25, the first air cooler 26, and the second air cooler 2.
7. Close the drying air circulation path that returns to the washing tub 16 through the second shutter 28 and air heater 29. However, the lint filter 23 is for catching lint etc. mixed into the drying air, and is made of cotton or wool with a mesh similar to that of a coffee strainer, so that lint lint etc. cannot get into the items being washed. Redeposition is prevented. 30 is an intake port, 31 is an intake shutter, 32 is an exhaust shutter, and 33 is an exhaust port.

The distillation pot 20 is provided with a discharge port 34 at the bottom that can be opened and closed to remove distillation slag, and the surrounding area has a double structure and is heated to a predetermined temperature by an electric heater immersed in a heating medium. It has a structure.

[Problem that the invention aims to solve]

However, in the above-mentioned still pot 34, even after the distillation is finished, the cleaning solvent vapor remains inside the still pot 34 and solidifies as the still pot cools.
It was discharged along with laundry sludge, etc. that had accumulated at the bottom.

On the other hand, chlorine-based organic solvents such as perchlor, carbon tetrachloride, trichlorethylene, and other organic solvents are used as cleaning solvents, and disposing of these organic solvents may become a source of pollution. There was a problem.

Further, since the volume of the distillation vessel 20 is usually large and the molecular weight of these cleaning solvents is relatively large, there is a problem in that a considerable amount of the cleaning solvent is exhausted and not reused as a resource.

The present invention has been made in view of the above circumstances, and provides a distillation pot for dry cleaning equipped with a solvent recovery device that can collect and reuse the cleaning solvent remaining in the distillation pot and prevent it from becoming a source of pollution. The purpose is to

[Means to solve problems]

A distillation pot for dry cleaning equipped with an embodiment of the solvent recovery device according to the present invention in accordance with the above-mentioned purpose supplies the cleaning solvent via an on-off valve to the bottom of the distillation pot for distilling the cleaning solvent of the washing tub after washing. A cleaning solvent liquefaction means for cooling and liquefying is connected thereto, and a solvent recovery device is attached to the distillation pot, which is characterized in that a closable atmosphere introduction pipe is connected to the upper part of the distillation pot.

Here, the cleaning solvent liquefaction means means something that cools and liquefies the vaporized cleaning solvent. For example, the cleaning solvent liquefaction means is connected to a cooling pipe for cooling the cleaning solvent and an outlet of the cooling pipe. The cleaning solvent collection container may be a cleaning solvent collection container equipped with a cooling mechanism (including air cooling or water cooling).

Further, since the solvent recovery container is for receiving the condensed solvent, it may have an open top, but it may also have a sealed structure as a whole, and an air exhaust pipe may be provided at the top. In this case, since air containing the solvent may be discharged from the air discharge pipe, it may be connected to the upper part of the distillation pot to return the solvent.

In addition, an air intake pipe that can be blocked refers to a pipe that is normally closed but has a structure that allows it to communicate with the atmosphere manually or automatically when necessary, and a cooling pipe does not necessarily have to be water-cooled. , including those constructed of ordinary tubes and cooled by the surrounding air.

[Effect]

Next, the operation of the dry cleaning distillation pot equipped with the solvent recovery device according to the present invention will be explained.

After the distillation of the cleaning solution is completed, an on-off valve communicating with the lower cleaning solvent liquefaction means is opened to guide the solvent gas to the lower cleaning solvent liquefaction means. As a result, the cleaning solvent gas is condensed and liquefied and can be recovered.

In this case, the cleaning solvent liquefaction means is composed of a cooling pipe and a cleaning solvent recovery container, and the solvent recovery container is of a sealed structure, and an air exhaust pipe connected to the top of the distillation pot is provided at the top. The air containing the solvent will be exhausted through the air exhaust pipe.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a sectional side view of a dry cleaning distillation pot equipped with a solvent recovery device according to an embodiment of the present invention. Note that the same components as in the conventional example are given the same numbers and their explanations are omitted.

As shown in FIG. 1, a dry cleaning distillation pot 35 equipped with a solvent recovery device according to an embodiment of the present invention includes an on-off valve 37 provided at the lower part of a distillation pot body 36, and an on-off valve 37 provided at the bottom of a distillation pot body 36. The cooling pipe 3, which is an example of the cleaning solvent liquefaction means 38a connected to the
8 and an outlet 39 of the cooling pipe 38, and an air exhaust pipe 41 connecting the solvent recovery container 40 and the upper part of the distillation pot body 36. These will be explained in detail below.

The distillation pot main body 36 has a double structure, and a heating medium is disposed in the outer container and heated by an electric heater (or steam heater) not shown, so that the distillation pot main body 36 is heated to a predetermined temperature. It's getting old.

A discharge port 36a is provided at the bottom of the distillation pot body 36.
is provided with a structure to discharge the solvent sludge accumulated inside, and an on-off valve 37 is provided to stop the cleaning solvent that has entered the distillation pot body 36.

The on-off valve 37 has a tapered stopper 43 that fits into a tapered hole 42 formed in the still body 36.
It has a rod 44 fixed to the stopper 43, and a handle 45 provided at the other end of the rod 44, and the on-off valve 37 is opened and closed by the back and forth movement of the handle 45. In addition, a branch-like protrusion 46 is provided around the rod 44, and by moving the rod 44 back and forth, the inside of the on-off valve 37 can be cleaned, and the on-off valve 37 can be cleaned of sludge, etc. This prevents it from becoming clogged.

A cooling pipe 38 is connected to the outlet of the on-off valve 37. This cooling pipe 38 has a structure in which it is cooled by the surrounding air, and is structured to liquefy the vapor of the cleaning solvent passing inside. Note that it is also possible to use a water-cooled type cooling pipe instead of this cooling pipe 38, and thereby it is also possible to shorten the entire length of the cooling pipe.

The outlet 39 of the cooling pipe 38 is connected to a solvent recovery container 40 having a closed structure, so that the liquefied solvent is collected into the solvent recovery container 40 . A discharge hole 48 is provided at the bottom of the solvent recovery container 40 via an on-off valve 47, so that accumulated cleaning solvent can be extracted.

An air exhaust pipe 41 connected to the still body 36 via an on-off valve 49 is connected to the upper part of the solvent recovery container 40, so that air to replace the cleaning solvent can escape.

After the cleaning process is completed, the distiller main body 36 receives water from the washing tub 16 via the button trap 17, the fourth solenoid valve 18, the pump 12, and the fifth solenoid valve 19.
A connection port 50 for receiving cleaning solution and a filter 1
A connection port 51 to which 4 is connected and a connection port 52 to which distillation condenser 21 is connected are provided as before. 54 are provided.

This air inlet pipe 54 has an inverted U-shape and is provided with a valve seat 55 near its outlet and a valve 56 that engages with the valve seat, and is normally closed by gravity. However, the structure is such that it opens when the inside of the still body 36 becomes negative pressure.

In the above embodiment, the valve 56 is closed by gravity, but it is also possible to close the valve by using a spring or the like, for example.

Next, to explain the operation of the distillation pot for dry cleaning equipped with a solvent recovery device according to an embodiment of the present invention, when the cleaning solvent is distilled after the cleaning process is completed in the washing tub 16, the cleaning solvent is vaporized. It is liquefied again and captured by the distillation condenser 21.

However, even with this distillation, the still body 3
The vaporized cleaning solvent contained in step 6 does not rise to the top. Then, the lower opening/closing valve 37 is opened and the cooling pipe 38 is moved. in this case,
If the on-off valve 37 is clogged, move the handle 45 back and forth to open the clogged portion.

Thereby, the cleaning solvent gas enters the cooling pipe 38 and is liquefied, and enters the solvent recovery container 40 from the outlet 39 thereof.

Furthermore, since the air inside the distillation pot body 36 becomes negative pressure, the valve 56 opens and the insufficient amount of air comes into the distillation vessel 40. As the cleaning solvent enters the solvent recovery container 40, the solvent recovery container 40 The air moves into the still body 36 through the air exhaust pipe 41 and the on-off valve 49, and does not leak to the outside at all.

Note that in the above embodiment, a valve that automatically opens and closes the air inlet pipe that can be blocked is used, but it is also possible to simply use the on-off valve 53 without using this, and in this case, the operator The on-off valve 53 will be opened and closed manually.

Through the above operations, the vapor of the cleaning solvent contained inside the still body is replaced with air, and the cleaning solvent is liquefied and collected in the solvent recovery container 47, where it can be recovered.

Further, in the above embodiment, the connection port of the air exhaust pipe is provided separately from the connection port of the air introduction pipe, but it is also possible to connect the connection port to the same connection port via a branch pipe.

Furthermore, although the air exhaust pipe is connected to the still body 36, since the cleaning solvent is heavy, it is also possible to raise the outlet of the air exhaust pipe and open it to the atmosphere.

[Effect of idea]

As is clear from the above description, the dry cleaning distillation pot equipped with the solvent recovery device according to the present invention can almost completely recover the cleaning solvent remaining in the distillation pot and can be reused.

Furthermore, since the cleaning solvent can be completely recovered, highly toxic cleaning solvents are no longer disposed of, and therefore, the source of pollution generated during dry cleaning can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a dry cleaning distillation pot equipped with a solvent recovery device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional dry cleaning device. Explanation of symbols, 35...Dry cleaning distillation pot equipped with a solvent recovery device, 36...Distillation pot body,
38a...Cleaning solvent liquefaction means, 38...Cooling pipe, 40
...solvent collection container, 41...air discharge pipe, 54...atmosphere introduction pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cleaning solvent liquefaction means for cooling and liquefying the cleaning solvent is connected to the bottom of the distillation pot that distills the cleaning solvent of the washing tub after cleaning treatment through an on-off valve. A distillation pot for dry cleaning equipped with a solvent recovery device, characterized in that a closable atmosphere introduction pipe is connected to the upper part of the distillation pot. (2) The cleaning solvent liquefaction means is attached to the solvent recovery device according to claim 1 of the utility model registration claim, which comprises a cooling pipe for cooling the cleaning solvent and a solvent recovery container connected to the outlet of the cooling pipe. Distillation kettle for dry cleaning. (3) A distillation pot for dry cleaning equipped with a solvent recovery device according to claim 2 of the utility model registration claim, wherein the upper part of the solvent recovery container is provided with an air exhaust pipe connected to the distillation pot.