JPS646794Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention uses organic compounds such as perchloroethylene, 1.1.1-trichloroethane, 1.1.2-trichloro-1.2.2-trifluoroethane (R, 113), and trichloromonofluoromethane (R11). The present invention relates to a dry cleaning device that uses a solvent, and particularly to a dry cleaning device that drains water from a clean tank that stores distilled cleaning solvent.

FIG. 1 shows an outline of a conventional dry cleaning apparatus. Here, the dry cleaning process will be outlined using FIG. 1 (hereinafter, perchlorethylene will be explained as an example).

First, clothing 2 is put in through door 1, and when the door 1 is closed and operation is started, the steps generally proceed in the following order.

(1) The solvent 4 is pumped up from the solvent tank 3 via the valve 5 with the pump 6, and the required amount of the solvent 4 is sent into the processing tank 10 through the path consisting of the valve 7 and the filter 8 or the path consisting of the valve 9.

(2) Gently rotate the processing drum 11 and pour the solvent 4 into the processing tank 10, button trap 12, valve 13,
The clothes 2 are washed by circulating through a pump 6 and a circuit consisting of a valve 7 and a filter 8 or a circuit consisting of a valve 9.

(3) Treatment tank 10, button trap 12, valve 1
3, the liquid is drained through the path of the pump 6, valve 14, and distiller 15, and then the processing drum 11 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2, and drain the liquid in the same way.

(4) Repeat steps (1) and (2) above.

(5) Treatment tank 10, button trap 12, valve 1
3. Drain the liquid into the solvent tank 3 through the route of the valve 5,
Subsequently, the processing drum 11 rotates at high speed to remove the clothing 2.
The solvent 4 inside is centrifuged and drained.

(6) Slowly rotate the processing drum 11 again and circulate air in the direction of the arrow 20 between the recovery air duct 19 consisting of the fan 16, air cooler 17, and air heater 18 and the processing tank 10 to dry the clothes 2. The solvent gas evaporated from the clothing 2 is condensed in the air cooler 17, enters the water separator 22 through the recovery path 21, and enters the clean tank 24 through the solvent pipe 23.

(7) When drying is completed, dampers 25 and 26 open as shown by the broken lines, fresh air is taken in from damper 25, and uncondensed solvent gas that cannot be recovered by air cooler 17 is exhausted from damper 26, eliminating the solvent odor in clothing 2. Deodorize.

(8) Solvent 4 that entered the distiller 15 in the step (3) above
is evaporated and condensed and recovered in the condenser 27,
It enters the clean tank 24 through the water separator 22 and the solvent pipe 23, and the partition plate 2 with an overflow
Return to solvent tank 3 from 8. Also water separator 2
The water separated in step 2 is discharged to the outside of the system through a water pipe 29.

Note that 30 in FIG. 1 is a steam pipe, which is connected to the air heater 18 and heats the air that has passed through the air cooler 17. 31 is the cooling water pipe, distiller 15
The evaporated solvent gas is condensed and liquefied. A steam pipe 32 heats and distills the solvent drained into the distiller 15.

Reference numeral 33 denotes a water drain valve, which is provided in the clean tank 24 and periodically (usually once a week) drains the water layer 35 that cannot be completely separated by the water separator 22 and is separated in the clean tank 24 and floats on the upper layer of the solvent 34. Discharge. In this case, receive the water layer 35 and the solvent containing water in a bucket or the like, and when the water layer 35 and the solvent no longer come out,
The drain valve 33 is closed, and the solvent and water in the bucket are transferred to the distiller 15 for regeneration.

However, the conventional device has the following drawbacks. That is, when discharging the water layer 35 floating on the upper layer of the clean tank 24, it is difficult to discharge because the surface area of the water layer 35 is large, and the water layer 35 and the solvent 3
Since the boundary between 4 and 4 was not clear, it was necessary to remove the solvent 34 as well, and it was necessary to regenerate it in the distiller 15.

Normally, the surface of the clean tank 24 is treated with hot-dip galvanizing, but there is a temperature difference on the inner wall of the ceiling of the tank 24 between when the machine is running and when it is stopped, and when it cools down, the solvent gas and moisture present in the upper space of the tank condense. and adheres to the inner wall of the ceiling. In general, the tendency for corrosion is strongest in the condensation section, and even in dry cleaning machines, while there is almost no corrosion on the bottom surface, corrosion on the ceiling walls has been observed here and there, and this corrosion has become a problem.

The present invention was proposed in order to solve the above-mentioned drawbacks of the conventional methods. Dry cleaning equipped with a condenser that condenses the condensed gas, a water separator that conducts the condensed liquid from the condenser and separates water and solvent by specific gravity, and a clean tank that conducts and stores the separated solvent from the water separator. In the machine, a drain valve is provided in the middle of the solvent conduit connecting the water separator and the clean tank, and one end of the overflow pipe is opened at the bottom of the clean tank, and the other end is connected to the solvent tank adjacent to the clean tank. By opening at the top of the overflow pipe and locating the horizontal part of the overflow pipe above the ceiling wall of the clean tank, the upper water layer of the clean tank can be easily and reliably discharged, and the ceiling of the clean tank can be opened. It is an object of the present invention to provide a dry cleaning machine that prevents wall corrosion.

An embodiment of the present invention will be described below with reference to the drawings. Fig. 2 is a partially detailed view of a clean tank showing an embodiment of the present invention. The other mechanisms of the dry cleaning machine are the same as the conventional dry cleaning machine shown in FIG.

Now, in FIG. 2, 36 is a water drain valve, which is provided by branching from the solvent pipe 23, and whose lower end is connected to the ceiling wall 38 of the clean tank 37 (first
The drain valve 33 in the figure has been removed).

39 is an overflow pipe, one end of which is opened at the bottom of the clean tank 37, the other end is opened at the top of the rinse tank 40, and the horizontal part level A of the pipe is located above the ceiling wall 38, so that the clean tank 37 The liquid level is always filled. Furthermore, even if the liquid level in the clean tank 37 drops due to use of liquid, the water will not move to the rinse tank 40 side. Note that rinsing clothing with a solvent containing water may cause the clothing to shrink. Further, it is desirable that the horizontal pipe level A and the drain pipe level B are the same.

Now, clean tank 37 filled with solvent
Then, the solvent (water is dissolved in the solvent at this stage) passes from the water separator 22 to the solvent pipe 23.
It flows into the clean tank 37. After a certain period of time within the clean tank 37, the solvent and water are separated due to the difference in specific gravity. For example, since water has a specific gravity of 1 and perchlorethylene has a specific gravity of 1.62, the water is pushed to the top and gradually accumulates in the pipe 23 as a water layer 41 in FIG. Furthermore, water that has collected in a narrow volume in the pipe can be easily and reliably drained by opening the drain valve 36.

The liquid level in the clean tank 37 is always filled with the overflow pipe 39, and even if the liquid level fluctuates (if part of the liquid in the clean tank is used)
However, there is no risk of water entering the rinse tank 40 because there is an overflow port from the bottom of the clean tank 37 to the rinse tank 40. Furthermore, since the inner surface of the ceiling wall 38 of the clean tank 37 is covered with the solvent, the risk of corrosion as in the conventional case is eliminated. Furthermore, since the entire volume of the clean tank 37 is used, the clean tank 37 can be made smaller in size compared to the conventional method.

In addition, in FIG. 2, the water layer 41 can be easily confirmed by adding a sight glass 42 (indicated by a two-dot chain line) to the branching portion of the drain valve 36 and the pipe 23. Furthermore, by forming an inclined ceiling wall 43 (indicated by a two-dot chain line) in the clean tank 37, gathering of the water layer 41 is further facilitated. Note that a wash tank (which stores cleaning solvent) may be used instead of the rinse tank 40.

Since the present invention is constructed as described in detail above, the upper water layer of the clean tank can be easily and reliably discharged, and corrosion of the ceiling wall of the clean tank can be prevented.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a conventional dry cleaning apparatus, and FIG. 2 is a sectional view showing the main parts of a dry cleaning machine according to an embodiment of the present invention. Explanation of the main parts of the diagram, 3... Solvent tank, 4...
... Solvent, 10 ... Processing tank, 11 ... Processing drum (washing drum), 22 ... Water separator, 23 ... Solvent piping (solvent conduit), 27 ... Condenser, 36 ...
...Drain valve, 37...Clean tank, 38...
Ceiling wall, 39... Overflow pipe, 40... Rinse tank (solvent tank).

Claims (1)

[Scope of utility model registration request] A washing drum, a distiller that guides the waste liquid from the drum and distills the waste liquid, a condenser that guides the solvent gas discharged from the distiller and condenses the gas, and a condenser that guides the condensate from the condenser. In a dry cleaning machine equipped with a water separator that separates water and a solvent by specific gravity, and a clean tank that guides and stores the separated solvent from the water separator, a solvent conduit connecting the water separator and the clean tank is provided. In addition to installing a water drain valve in the middle, one end of the overflow pipe is opened at the bottom of the clean tank, and the other end is opened at the top of the solvent tank adjacent to the clean tank, and the horizontal level of the overflow pipe is cleaned. A dry cleaning machine characterized by being located above the ceiling wall of a tank.