JPH0671514B2 - Dry cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to perchlorethylene, 111 trichloroethane,
The present invention relates to a dry cleaning device using an organic solvent such as Freon R113 and turpentine (petroleum-based), and particularly to a dry cleaning device having a characteristic in the solvent recovery section.

(Prior Art) First, a general dry cleaning process will be outlined with reference to FIG. When the clothing 2 is put in through the door 1 and the door 1 is closed and the operation is started, the process generally proceeds in the following order.

． The solvent 4 is pumped from the solvent tank 3 through the valve 5 by the pump 6, and the required amount of the solvent 4 is sent to the processing tank 10 through the path including the valve 7 and the filter 8 or the path including the valve 9.

． Rotate the processing drum 11 slowly and add the solvent 4 to the processing tank 10,
The garment 2 is washed by circulating it through a circuit composed of the button trap 12, the valve 13, the pump 6, the valve 7, the filter 8 or the valve 9.

． The treatment tank 10, the button trap 12, the valve 13, the pump 6, the valve 14, and the distiller 15 are used to drain the liquid, and then the treatment drum 11 is rotated at a high speed to centrifuge the solvent 4 in the garment 2 and similarly discharged. To liquidate.

． Repeat the above steps.

． Processing tank 10, button trap 12, valve 13, valve 5
The liquid is drained to the solvent tank 3 by the route of, and then the processing drum 11
Rotates at high speed to centrifuge the solvent 4 in the garment 2 and drain it.

． The processing drum 11 is swung around again, and the recovery air duct 19 including the fan 16, the air cooler 17, and the air heater 18 is provided.
Then, air is circulated between the processing tanks 10 in the direction of the arrow 20 to dry the clothes 2. The solvent gas evaporated from the clothing 2 is condensed by the air cooler 17, enters the water separator 22 through the recovery path 21,
Enter the clean tank 24 through the solvent pipe 23.

． When the drying is completed, the dampers 25 and 26 open as shown by the broken line, fresh air is taken in from the damper 25, the uncondensed solvent gas that cannot be collected by the air cooler 17 is exhausted from the damper 26, and the solvent odor in the clothing 2 is deodorized. .

． The solvent 4 that has entered the distiller 15 in the above step evaporates and is condensed and recovered by the condenser 27. The water separator 22 and the solvent pipe
After passing through 23, it enters the clean tank 24, and returns from the partition plate with overflow 28 to the solvent tank 3. The water separator 22
The water separated in step 1 is discharged to the outside of the system by the water pipe 29.

As is clear from the above overview, in the conventional dry cleaning drying method, the processing drum is swung around and the recovery air duct 19 including the fan 16, the air cooler 17, and the air heater 18 and the processing tank 10 are oriented in the direction of the arrow 20. The clothes 2 are dried by circulating air, and the air temperature is about 60 ° C before the air cooler 17 and after the air cooler 17 in the steady state.
The temperature is around 30 ° C and about 70 ° C after the air heater 18, and the circulating air during the drying process is an air cooler 17 for condensing and collecting the solvent gas.
And the heating by the air heater 18 are repeatedly received.

By the way, originally, the theoretical energy value required to dry the clothes 2 is to evaporate the clothes 4 and the solvent 4 contained in the clothes 2 from the room temperature to 60 ° C. However, the conventional drying method for heating and cooling circulating air as described above has a problem of contact efficiency of hot air to the clothes 2 and energy loss due to heating and heat dissipation of the device. At present, however, it usually requires several times as much energy as the theoretical value.

(Problems to be Solved by the Invention) The present invention has been made in view of the conventional problem that the waste of energy required for drying as described above is abnormally high. Instead of the air cooler of the related art, circulating air is used. The solvent gas contained inside is condensed into the pores of the porous membrane without cooling the air, and at the same time, the solvent is recovered from the membrane surface on the opposite side to the condensation surface by vacuum operation. It is intended to provide a cleaning device. Since the pores are filled with the condensed solvent, there is almost no air leakage.

(Means for Solving Problems) For this reason, the present invention provides a dry cleaning apparatus for drying a laundry while collecting solvent while circulating air between the recovery air duct and the processing tank. In addition to incorporating a condensation membrane module that utilizes the capillary condensation effect of fine pores, a vacuum generator for suction processing of the solvent condensed by the condensation membrane module is installed in parallel. It is a means.

(Operation) According to the present invention thus configured, the circulating air is passed through the porous condensing membrane module to condense the solvent in the pores of the module and to suck and recover the solvent.
There is no need to cool the air as in the past, and it is possible to achieve significant energy savings (1/2 or more) compared to the past.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the structure of the dry cleaner according to the present embodiment. Since the basic structure is the same as that of FIG. 3, the same parts are designated by the same reference numerals and the description thereof is omitted. Here, the description will focus on the parts different from the conventional ones. That is, in the present embodiment, the part different from the conventional one is replaced with the air cooler 17 in the recovery air duct 19 shown in FIG. 3, and the condensation film module 30 is incorporated, and the condensation film module is equipped with the intake pipe 32 and the cold trap 33. A solvent recovery device is configured by being connected to the vacuum generation device 37 and the like via the above.

Here, the structure of the solvent recovery apparatus according to the present embodiment will be described in more detail. The condensation membrane module 30 is composed of a large number of condensation membrane elements (normally tubular shapes) 31 and partition walls 39 that support these.

The condensation film module 30 is connected to a cold trap 33 by an intake pipe 32, and the cold trap 33 has a built-in cooling coil 34 which is cooled by a refrigerator or the like (not shown). Then, a solvent discharge pipe 40 provided with a valve 35 is extended from the lower portion of the trap 33 and connected to the water separator 22. Further, the trap 33 is provided with a valve 36 that opens in synchronization with the solvent discharge pipe 40. The cold trap 33 is connected to a vacuum generator 37 via an intake pipe 32 ', and the vacuum generator 37 further includes an exhaust pipe 38 for exhausting air.
Are connected.

Next, the operation of the above structure will be described. Even in the device of this embodiment, the process is completely the same as the conventional technique until the door 1 is opened, the clothes 2 are put in, and the washing process is completed.

When entering the drying step, the drying proceeds in the next step.

A recovery air duct consisting of a fan 16, a condensation film module 30, and an air heater 18 by rotating the processing drum 11 slowly.
Air is circulated between the processing tank 10 and the processing tank 10 in the direction of the arrow 20, and at the same time, the vacuum generator 37 is operated. At this time, the cooling coil 34 has been cooled in advance by a refrigerator (not shown) or the like, and the valves 35 and 36 are closed.

The solvent gas evaporated from the clothing 2 is condensed in the pores on the inner surface of the condensation membrane element (normally tubular shape) 31.

As shown in FIG. 2, the pores are condensed membrane elements.
Since the condensation film 310 of 31 is connected to the inside (a) and outside (b) of the condensation film 310 and the outside (b) is in a vacuum, the solvent 102 condensed in the pores becomes the solvent gas 101 and evaporates again. , First
The cold trap 33 enters through the intake pipe 32 shown in the figure, and is condensed and recovered by the cooling coil 34.

The uncondensed solvent gas and air in the cold trap 33 are
Inhaled by the vacuum generator 37 through the intake pipe 32 ',
It is discharged from the exhaust pipe 38.

As shown in FIG. 2, when the evaporation of the solvent from the clothing 2 is active, the pores are blocked with the condensate 102, so that the air hardly leaks to the vacuum side. If this happens, the amount of condensation will decrease and air will leak, so if the vacuum pressure is controlled here, the end of drying can also be detected.

When the drying is completed, the operation of the vacuum generator is stopped, the valves 35 and 36 of the cold trap 33 are opened, and the solvent condensed and collected in the cold trap 33 is collected in the solvent discharge pipe 40.
Is discharged to the water separator 22 via.

In this embodiment, the air cooler 17 (third embodiment)
(Fig.) And the condensation film module 30 (Fig. 1) of the present invention were replaced with each other.
It is needless to say that the condensation film module 30 according to the present invention may be additionally installed between the air cooler 17 and the fan 16 except (FIG. 3).

In this case, when the air cooler 17 is operated only at the final stage of drying, the solvent gas saturation in the air is temporarily increased, and the effect of collecting the condensed film is improved.

(Effects of the Invention) As described in detail above, the present invention incorporates a condensation membrane module utilizing the capillary condensation action of fine pores in the recovery air duct, and a vacuum for suctioning the solvent condensed in the condensation membrane module. Since the generators are arranged side by side, a vacuum is formed on the side opposite to the solvent gas side, so that the solvent condensed in the pores again becomes solvent gas on the vacuum side and evaporates. Although air and organic solvent gas are discharged from the treatment tank of the present invention, since air is a non-condensable gas component at normal temperature, according to the present invention, the condensable gas in the non-condensable gas can be separated. . Therefore, in the present invention, since the air circulating between the recovery air duct and the processing tank is not cooled during drying, the heat load of the air heater can be reduced to a fraction of that of the conventional one, and the vacuum generator and the like can be used. The overall energy, including energy, can be reduced to less than 1/2 of the conventional energy.

In addition, the cooling water used for conventional air coolers is no longer required, which leads to resource saving.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a dry cleaning apparatus showing an embodiment of the present invention, FIG. 2 is a sectional view of a condensed film applied to the present invention and a principle diagram of solvent gas condensation, and FIG. 3 is a conventional dry cleaning. It is a whole block diagram of an apparatus. Explanation of the main parts of the figure 10 …… Treatment tank, 16 …… Huan 18 …… Air heater, 19 …… Recovery air duct 20 …… Air circulation direction, 22 …… Water separator 30 …… Condensation membrane module 33 …… Cold trays 37 ... Vacuum generator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Suzumura 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Research Laboratory (56) References JP-A-60-54703 (JP, A)

Claims (1)

[Claims] 1. A dry cleaning apparatus for drying an article to be washed while collecting solvent while circulating air between a recovery air duct and a processing tank and condensing by utilizing a capillary condensation action of fine pores in the recovery air duct. A dry cleaning device comprising a membrane module and a vacuum generator arranged in parallel for sucking the solvent condensed by the condensation membrane module.