JP2761110B2 - Dry cleaner odor removal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing odor from a dry cleaner using an organic solvent such as perchlorethylene, chlorofluorocarbon 113, 1.1.1 trichloroethane and the like.

[0002]

2. Description of the Related Art A conventional dry cleaning process will be outlined with reference to FIG. First, clothing 2 is put in through the door 1, and when the door 1 is closed to start the operation, the steps generally proceed in the following order. . The solvent 4 is pumped from the solvent tank 3 by the pump 6 via the valve 5, and the required amount of the solvent 4 is fed into the processing tank 10 through the path including the valve 7 and the filter 8 or the path including the valve 9. . The processing drum 11 is slowly rotated to remove the solvent 4 from the processing tank 1
The clothing 2 is washed by circulating in a circuit comprising a button trap 12, a button trap 12, a valve 13, a pump 6, a valve 7, a filter 8 or a valve 9. . The liquid is drained through the path of the processing tank 10, the button trap 12, the valve 13, the pump 6, the valve 14, and the still 15 and then the processing drum 11 rotates at a high speed to centrifuge the solvent 4 in the garment 2, and similarly. Drain. . Item, repeat the process of the item. . The solvent 4 is centrifuged through the path of the processing tank 10, the button trap 12, the valve 13, and the valve 5 and drained. . Turn the processing drum 11 slowly again,
The air is circulated in the direction of the arrow 20 between the recovery air duct 19 including the air cooler 17 and the air heater 18 and the processing tank 10 to dry the clothing 2. The solvent gas evaporated from the clothing 2 is condensed by the air cooler 17, enters the water separator 22 via the recovery path 21, and enters the clean tank 24 through the solvent pipe 23. . When the drying is completed, the valve 25 is opened and the damper 26 is opened as indicated by a broken line, and the valve 25, the processing tank 10, the recovery air duct 19, the damper 26, and the solvent recovery device 30 are opened.
A dilute uncondensed solvent gas, which cannot be recovered in the drying step, is adsorbed by activated carbon or the like in the solvent recovery device 30, and the solvent odor in the drying system including the clothing 2 is closed and deodorized. . The solvent 4 that has entered the distillation unit 15 in the process described in the item 3 is evaporated and condensed and recovered by the condenser 27, enters the clean tank 24 through the water separator 22 and the solvent pipe 23, and enters the solvent tank 3 from the overflow-equipped partition plate 28. Return to The water separated by the water separator 22 is discharged out of the system by a water pipe 29.

[0003]

The general dry cleaning process has been outlined above. However, after the deodorizing process is completed, there is no solvent odor when the door 1 is opened to take out the clothing 2. However, if a small amount of solvent remains in the pipe connected to the processing tank 2, the solvent evaporates, so that it was impossible to maintain a low solvent gas concentration in the processing tank 2.

The present invention has been made to solve the above-mentioned conventional problems, and has been made to eliminate a solvent remaining in a pipe after completion of a process and prevent a solvent gas concentration in a processing tank from increasing due to re-evaporation. It is intended to provide a method for removing the odor of the cleaner.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a method of evaporating and drying a solvent remaining in a piping system by blowing hot air into a piping system leading to a treatment tank of a dry cleaner or heating the piping system. This is a method in which the odor is removed and the inside of the processing tank is deodorized, and this is used as a means for solving the problem.

[0006]

[Action] Solvent remains in the piping used to feed the solvent into the processing tank during cleaning. A portion of the hot air for drying is fed into the piping system in which the solvent remains, or heated by a heating means, thereby evaporating and drying the residual solvent in the piping to remove the solvent. The cause of the increase in the gas concentration is removed to deodorize the inside of the processing tank.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. Note that the steps of washing, drying and closed deodorization in FIG. 1 are the same as those in the prior art described with reference to FIG. 2 as described above, and thus a detailed description of this point will be omitted here.

FIG. 1 shows an embodiment of the present invention and FIG. 2 shows a conventional example.
The difference is that the button trap 12 and a dry air pipe 40 for the solvent pipe at the inlet of the processing tank, a valve 42 and a valve 41 for opening and closing the solvent pipe at the inlet of the processing tank are attached.

During the cleaning process, the valve 42 is closed to prevent the solvent from flowing into the drying air pipe 40.
When the drying step is completed after the liquid removing step, the valve 41 is closed and the valve 42 is opened, and the recovery air duct 1 including the fan 16, the air cooler 17, and the air heater 18 is opened.
By circulating air in the direction of arrow 20 between 9 and processing tank 10, a part of hot air for drying clothing 2 is supplied to button trap 12 in which solvent remains, and processing tank inlet solvent pipe, completely evaporating the residual solvent content, can be dried, without solvent gas concentration in the re-evaporation by Ri treatment tank 10 to the residual solvent is increased, it is possible to maintain a low solvent gas concentration, worker process without being exposed to the strong solvent odor when clothing was taken out after the completion, it is possible to work safely.

In the embodiment of FIG. 1 described above, hot air is used as a means for evaporating and drying the residual solvent, but other means such as a steam jacket,
The same effect can be obtained by evaporating and drying by direct heating means such as a heater.

[0011]

As described above in detail, according to the present invention, the residual solvent in the pipe connected to the processing tank is completely evaporated,
Drying and elimination eliminates the flow of solvent gas into the treatment tank, so that even when the door is opened at the time of clothing removal after the process is completed, the solvent gas concentration can be maintained at a low level so that solvent odor is not felt. it can.

[Brief description of the drawings]

FIG. 1 is a system diagram of a dry cleaner according to an embodiment of the present invention.

FIG. 2 is a system diagram of a conventional dry cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Clothing 10 Processing tank 12 Button trap 25 Valve 26 Damper 30 Solvent recovery device 40 Dry air piping 41, 42 Valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-236995 (JP, A) JP-A-4-8398 (JP, A) JP-A-4-166198 (JP, A) 86198 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) D06F 43/08

Claims (1)

(57) [Claims] 1. A hot air is blown into a piping system connected to a treatment tank of a dry cleaner, or the piping system is heated to
A method for removing odor of a dry cleaner, comprising removing a solvent remaining in the piping system by evaporating and drying it, and deodorizing the inside of the treatment tank.