JPS60222091A - Drycleaning apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in dry cleaning equipment.

An outline of a conventional dry cleaning apparatus will be explained using FIG. 1. In addition, the organic solvents used for dry cleaning/gu include perchloroethylene, 1.1.1-)lichloroethane, 1,1.2-)lichloro-1,2,2-)lifluoroethane (mxta), There are trichloromonofluoromethane (R11), etc., but in the following explanation, it will be referred to as ノJ?
-Explanation using chlorethylene as an example.

Specifically, in the figure, 1 is a door, and when the clothes 2 to be cleaned are put in through the door 1 and the door 1 is closed to start operation, the steps normally proceed in the following order.

(1) The solvent 4 is pumped up from the solvent tank 3 via the pulp 5 by the bomb f6, and is sent to the processing tank 10 through the path consisting of the pulp 7 and the filter 8 or the path consisting of the pulp 9.
The required amount of solvent 4 is fed into the tank.

(2) When the solvent 4 is supplied into the processing tank 10 with the necessary lid, the processing drum 11 in the processing @ 10 is rotated multiple times, and the solvent 4 is supplied to the processing tank IQ, fl evening trough f12, and pulp 13.
, the solvent 4 is circulated through a path consisting of a pulp 7 and a filter 8, or a path consisting of a pulp 9 via a pump 6, and the clothing 2 is washed.

(3) When the cleaning for a predetermined period of time is completed, the solvent 4 in the treatment tank 10 is treated with 'N10, ? tantra, p12, pal f13,
The liquid is drained to the distiller 15 through the route of the bomb f6 and the pulp 14,
Subsequently, the processing drum 1 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2 and waste it. The solvent that has entered the distiller 15 evaporates and is led to a condenser 27 where it is condensed, then recovered, water is separated in a water separator 22, and the solvent passes through a solvent pipe 23 and enters the cleaning 24, where it overflows. It returns to the solvent tank 3 from the partition plate 28.

(4) Repeat the steps (1) and (2) above to perform cleaning.

(5) Processing tank 10, butane trap 12, valve 13,
The liquid is drained into the solvent tank 3 through the path of the valve 5, and then the processing drum 11 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2 and waste the liquid.

(6) Gently rotate the processing drum 11 again, and
Air is circulated in the direction of arrow 20 between a recovery air duct 19 consisting of an air cooler 17 and an air heater 18 and the processing tank 10 to dry the clothes 2. At this time, the solvent gas evaporated from the clothing 2 is condensed in the air cooler 11 provided in the recovery air duct 19, and this condensed liquid enters the water separator 22 through the recovery path 21, where it is separated into water. , and enters the cleaning tank 24 through the solvent pipe 23.

(7) When the drying is completed, the tips 25 and 26 of the recovery air duct 19 open as shown by the broken lines, and fresh air is taken in from the tip 25 and from the tip 26 to the air cooler 1.
In step 7, the uncondensed solvent gas that cannot be recovered is exhausted, and the solvent odor in the clothing 2 is deodorized.

One cycle of the above (1) to (7) is divided as shown in FIG. In addition, 30 in FIG. 1 is a steam pipe, which is connected to the air heater 18 to heat the air that has passed through the air cooler 17, and 31 is a cooling water pipe, which is connected to the air heater 18 to heat the air that has passed through the air cooler 17. It condenses and liquefies the solvent gas. In addition, 32 is a steam pipe, and the distiller 15 has an Fv
6. The solvent is distilled by heating from the surroundings (hereinafter, this is referred to as indirect distillation). 33 is a steam pipe, and this steam pipe 33 directly heats and distills the solvent discharged into the distiller 15 (hereinafter, this is referred to as direct distillation).

Since the indirect distillation is automatically performed in step (3) above, it is generally referred to as continuous distillation. Solid dirt and oily dirt accumulate in the distiller 15 as distillation scum due to indirect distillation, but if it exceeds 90 degrees, the distillation effect will be adversely affected (
Eventually, it will stop distilling, so remove it at the end of each day's work.

In addition, the direct heat distillation is performed by operating the valve of the steam pipe 33 prior to the above-described process, such as when expelling the solvent gas contained in the distillation residue.

As mentioned above, the water separator 2
The form in which the recovered solvent flows into step 2 is three times (step (3),
(during step (6) and direct heat distillation), the water separator 22 separates the water contained in the solvent based on the difference in specific gravity, and discharges this separated water out of the system from the water pipe 29, leaving it as it is. I'm trying to dispose of it. Therefore, the separated water contains a small amount of solvent. For example, if we take a small machine as an example of the daily throughput of a dry cleaner, and if we wash 10 kg of laundry about 10 times, the amount of water drained out of the system from the water separator 22 will be about 6 iI per day. Of these, the amount of waste water from indirect heat distillation Q1 = 27/day, and the amount of waste water from direct heat distillation ψQt = 44! / day.

And the solvent concentration in these wastewater is Ql solvent concentration = 1
00 ppm, the solvent concentration of Qg = 300 ppm.

Next, we will discuss the case of a dry cleaner with an activated carbon solvent recovery device in the third section.
This will be explained using figures.

In the figure, 34 is the main body of the dry cleaner (dry cleaner corresponding to the one shown in FIG.
5 is a recovery air duct 19 provided in the main body 34;
This is the fresh air intake by the damper 25. 36 is a deodorizing port of the recovery air duct 19 provided in the main body 34, and the damper 26
This is the exhaust port for uncondensed gas. 37 is an activated carbon tank which contains a heat storage body and activated carbon. 37a is an exhaust port of the activated carbon tank 37, which communicates with the activated carbon tank 37. 3
Reference numeral 7b denotes a steam regulator, which communicates with the activated carbon tank 37. 3
8 is a drying fan that sends warm air to the activated carbon tank 37; 39 is a water-cooled condenser; It is for condensing. Reference numeral 40 denotes a cold storage tank provided in the circulation path of the solvent 4 to the main body 34, and a cold storage body is built in the cold storage tank 40.

Reference numeral 41 denotes a refrigerator for cooling the cold storage body in the cold storage tank 40. 42 is a water separator, and the cold storage tank 40
A water-cooled condenser 39 separates the condensed liquid water and takes out the bath agent.

In the apparatus having such a structure, (1) cleaning is performed in the same process as described above, and when the cleaning is completed, water containing some solvent is discharged from the water pipe 29 of the water separator 22 of the main body 34 to the outside of the system.

■ On the other hand, the highly concentrated solvent gas (estimated concentration: 1 ft: 2501/m3) exhausted from the deodorizing port 36 is stored in the cold storage tank 40.
It is further circulated in a circuit that returns to the main body 34 via the aero 35. The solvent gas is then cooled, condensed and liquefied in the cold storage tank 40 and sent to the water separator 42. The water separator 42 separates the water contained in the condensate, and the separated solvent is discharged to the solvent tank of the main body 34, and the separated water containing some solvent is discharged to the outside of the system.

The refrigerator 41 cools the cold storage tank 40 before the above steps.

(2) The solvent gas whose concentration has become low in the step (2) (estimated concentration 251//m') is led to the activated carbon tank 37, where the activated carbon adsorbs the solvent. The air from which the solvent has been removed by this adsorption is exhausted from the exhaust port 37a.

■ Next, the exhaust port 37a is closed and steam flows into the activated carbon tank 37 from the steam pipe 37b, and the solvent adsorbed on the activated carbon is separated by steam, which is guided to the water-cooled condenser 39, liquefied, and sent to the water separator 42. And, for this water separator 42, ■
Similarly, the solvent and water are separated and discharged.

■ The above delayering step ■ Immediately opens the exhaust port 37 m and sends warm air from the drying fan 38 to the activated carbon tank 37 to dry and regenerate the moist activated carbon.

Cleaning is completed after such a process, but in the case of this dry cleaner equipped with an activated carbon solvent recovery device, the amount of water discharged from both the water separators 22 and 42 is 2 to 2 in the case of Fig. 1.
It will be nearly three times as large.

Moreover, all of these conventional devices simply dispose of the wastewater from the water separator, and if they are operated centrally in Tendo, the groundwater in that area will be contaminated with solvents dissolved in the wastewater. Contamination problems are rare. In particular, recently, the contamination of groundwater for tap water by organic chlorine compounds has been recognized as a problem, and related ministries and agencies are taking action, so there is a sense of security that the problem of such contamination should be resolved as soon as possible.

The present invention has been made in view of the above circumstances, and is a dry cleaning device that cleans items to be washed using a solvent. An aeration device is installed to store and aerate the wastewater from the water separator, and the tank that receives the wastewater from the water separator is used to temporarily store one day's worth of wastewater, which is used to separate work, and then send it to the aeration system. The purpose of the present invention is to provide a dry cleaning device that reduces the solvent content in wastewater by spreading and aerating the water to release the solvent contained in the water, thereby preventing contamination of groundwater, etc. due to the wastewater. shall be.

An embodiment of the present invention will be described below.

Figure 4 is a schematic diagram showing an example of this device, and the structure is basically the same as the conventional one except for the configuration of the aeration system.
Portions that are the same as or similar to those in the conventional structure described above are designated by the same reference numerals, and their description will be omitted here.

In the figure, 43 is a tank that receives and stores water separated by the water separator 22 in the main body 34 via the water pipe 29, for example, a plastic container is used. Reference numeral 44 is an aeration tank made of, for example, a plastic container, in which the water stored in the tank 43 is forced to aerate, and has a built-in porous ventilation body that generates air or gas for aeration in the form of cells. Reference numeral 45 denotes a valve, which is an on-off valve provided in a pipe that communicates the tank 43 and the aeration tank 44. A valve 46 is an on-off valve provided on the drain pipe of the aeration tank 44. Reference numeral 47 denotes piping, which communicates the exhaust duct connected to the deodorizing port 36 with the aeration tank 44, rotates the 77-ring 16 provided in the recovery air duct 19 of the main body 34, and rotates the dampers 25 and 26. When it is opened and fresh air is sent into the main body 34 from the outside, the air exhausted from the deodorizing port 36 of the Dan 926 is sent into the porous ventilation body.

Next, the operation of the present apparatus having the above structure will be explained. Since the cleaning process is the same as in the conventional example, the treatment of waste water, which is the main feature of the present invention, will be explained here.

(2) In this device, the tank 43 stores, for example, one day's worth of waste water discharged from the water separator 22 of the main body 34.

■ At the end of the day's work or the start of the next day's work, the waste water in the tank 43 is transferred to the aeration tank 44 by operating the vibrator 45.

■ When the main body 34 is operated with the valves 4'5 and 46 closed, the waste water separated from the water separator 22 flows into the tank 43.
Also, at the end of the cleaning process, the damper 25,
26 is opened to send outside air into the main body 34 for deodorization, a part of the exhaust air from the deodorizing port 36 of the recovery air duct of the main body 34 is supplied to the porous vent of the aeration tank 44 through the circuit of the piping 47. , aerate the wastewater in the tank to release solvent gas. In this case, the solvent contained in the stored water in the aeration tank 44 is aerated and evaporated, and the amount of solvent contained in the stored water becomes extremely small.

■ Operate and move the aeration tank 45 at the end of the day or at the beginning of the next day.

■ By repeating the above steps ■■, it is possible to aerate and discharge wastewater containing almost no solvent from the system.

In this way, by adding a simple aeration device and aerating the wastewater from the water separator of the dry cleaner, it is possible to minimize the amount of solvent contained in the wastewater, which is effective in preventing groundwater contamination. .

FIG. 5 shows the overall configuration when the above aeration device is applied to a dry cleaner equipped with an activated carbon solvent recovery device.

In FIG. 5, parts that are the same as or similar to those in FIGS. 1, 3, and 4 are given the same reference numerals, and their explanations will be omitted.

In the figure, 48 is an aeration tank, which corresponds to the aeration tank 44 described above, and is, for example, a plastic container equipped with a gas thinning hood. Further, 49 is a pipe that communicates with the aeration tank 48 and the fresh air inlet pipe. Therefore, in this configuration, the exhaust gas from the activated carbon tank 37 is led to the aeration tank 48 and subjected to aeration, and then sent to the main body 34 and circulated back to the activated carbon tank 37.

In such a configuration, wastewater treatment is performed as follows.

■ The water separator 22 and water separator 4 of the main body 34 are installed in the tank 43.
For example, one day's worth of wastewater can be stored in each of 2.

, ■ At the end of the work day on a western day or at the beginning of the next day, the waste water in the tank 43 is transferred to the aeration tank 48 by operating the valve 45.

■ When the main body 34 is operated with the valves 45 and 46 closed, and the activated carbon solvent recovery device is heated to steam and the activated carbon adhering solvent is separated and recovered from the activated carbon, the waste water separated from the water separator 22 and 42 is sent to the tank. 43. Further, a part of the exhaust gas from the exhaust port 37a in the activated carbon 1a37 is also supplied to the aeration tank 48 through the circuit of the piping 47, and by this exhaust, the waste water in the aeration tank 48 is aerated and the solvent contained in this waste water is aerated. Gas is released. This released gas is in the aeration tank 48.
is stored in the upper collection section of the

(2) The solvent gas released into the aeration tank 48P3 and stored in the collection section passes through the main body 34 together with the air that is delayed in supply during the deodorizing process, and is adsorbed onto activated carbon in the activated carbon tank and regenerated. This also makes it possible to recover and reuse the solvent gas released from the wastewater during aeration.

■ At the end of the day or the start of the next day, drain the waste water in the aeration tank 48 by operating the nonolube 46, and then transfer it to the tank 4.
The waste water inside 3 is transferred by operating the vibrator 45.

■ By repeating the above steps ■■■, aerated wastewater containing almost no solvent can be discharged from the system.

The air supply system for aeration is shown in Figures 4 and 5.
In addition to the embodiment shown in the figure, in consideration of the case where the aeration tanks 44 and 4B are separated from the operation of the dry cleaner main body 34 and used independently, the piping 47 is equipped with a switching valve A +'B and an air source as shown in Fig. 6. For example, a blower C may be connected, or a switching valve B and a steam pipe 37b may be connected as shown in FIG. Furthermore, by aerating sludge containing solvents and waste caused by solvents before disposal, it becomes possible to process the waste without having to hire a processing company or have separate equipment.

In addition, the tank 43 and valve 45 are omitted, one day's worth of wastewater is stored in the aeration tank 44, and aeration is carried out by manual operation (dry operation) of the main body 34 at the end of the day's work or at the start of the next day. Good too.

As described in detail above, the present invention provides a dry cleaning apparatus that cleans items to be washed using a solvent, in which waste water from a water separator for separating water contained in the solvent used for cleaning is provided. Install an aeration device to store and aerate.
Since the wastewater from the water separator is stored and the solvent containing it is released through aeration, the solvent content of the wastewater after aeration is extremely small, so there is no risk of environmental pollution even if it is discarded. In addition, in devices equipped with an activated carbon solvent recovery device, the solvent gas released from the wastewater through aeration is returned to the main unit and circulated to the activated carbon tank, thereby making it possible to recover the solvent in the wastewater. It is possible to provide a dry cleaning device that can prevent pollution and save resources by being able to perform recycling and effectively using solvents.

[Brief explanation of the drawing]

Figure M1 is a diagram showing a schematic configuration of a conventional device, Figure 2 is a diagram showing its cycle, Figure 3 is a diagram showing a schematic configuration of a conventional device equipped with an activated carbon solvent recovery device, and Figure 4 is a diagram showing a schematic configuration of a conventional device equipped with an activated carbon solvent recovery device. A diagram showing one embodiment of the present invention, FIG. 5 is a diagram showing a configuration when the present invention is applied to an apparatus with an activated carbon solvent recovery device, and FIGS. 6 and 7 are other embodiments of the aeration device part. FIG. 1...door, 2...clothing, 3...solvent tank, 4
...Solvent, 5...Valve, 6...Pump, 7,9
．． 13゜14.45.46... Valve, 8... Filter, 10... Processing tank, 11... Processing drum, 12
...button trap, 15... distiller, 16...
Fan, 12...Air cooler, 18...Air heater, 19...Recovery air duct, 22.42...Water separator, 23...Solvent piping, 24...Talinta, 2
5.26... Damper, 27... Capacitor, 28.
... Partition plate with automatic flow, 30 ... Steam piping, 3
1...Cooling water piping, 32.33...Steam piping, 34
...Main body, 37...Activated carbon tank, 38...Drying fan, 39...Water-cooled condenser, 40...Cold storage tank,
41... Refrigerator, 43... Tank, 44. ．． 4B・
...Aeration tank, C...Blower. Applicant Enoki Patent Attorney Takehiko Suzue Figure 1 Figure 2 Q Figure 4

Claims (1)

[Claims] In a dry cleaning device that cleans items to be washed using a solvent, an aeration device is installed to store and aerate wastewater from a water separator for separating water contained in the solvent used for cleaning, A dry cleaning device characterized in that it discharges a silica-containing solvent through aeration.