JP3408646B2 - Dry cleaner filter regeneration method, dry cleaner and dry cleaning 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 regenerating a filter cloth filter of a dry cleaner.

[0002]

2. Description of the Related Art A washing process of a conventional dry cleaner provided with a solvent filter using a resin fiber as a filter cloth and a regeneration process of the solvent filter will be described with reference to FIGS. FIG. 2 is a view showing a rotary filter 10 (hereinafter referred to as a filter cloth filter) using the resin fiber as a filter cloth. FIG. 2 (a) is a side cross-sectional view passing through an axis, and FIG. It is AA sectional drawing of a). In the figure, 11 is a filter cloth made of ultra-fine polyester fiber (having a mesh of about 30μ), 12 is a holder, 13 is a filter tank, 14 is a pipe having many holes, and 15 and 16 are filter tanks respectively. At the inlet and outlet provided at 13, the filter cloth 11 is formed in the shape of a soroban bead, and a plurality of (with two in the figure) by the holder 12
Is fixed to a pipe 14, and both ends of the pipe 14 are rotatably and water-tightly supported by the filter tank 13, and one end (the left side in the figure) is connected to the outlet 16 and the other end protrudes out of the filter tank 13. As shown in FIG. 4, it is driven to rotate by a drive motor 46 via a V-belt 17. The operation of the filter cloth filter 10 having such a configuration will be described.
From the outside to the inside, where dirt is trapped and the filtered and cleaned solvent enters through a hole in pipe 14 and exits through outlet 16.

FIG. 4 is a schematic system diagram showing a main part of a dry cleaner provided with the filter cloth filter 10. The operation of the washing step and the regeneration step of the filter will be described with reference to FIG. In the figure, reference numeral 46 denotes a drive motor of the filter cloth filter 10;
1 is a processing tank for washing, 32 is a button trap for removing solid foreign matter, 33 is a pump for transporting the solvent, 34 is a wash tank for containing the solvent, 35 is a still for recycling the dirty solvent, and 36 and 37. , 38 and 39 are a wash tank outlet valve, a processing tank inlet valve, a filter inlet valve,
And a still inlet valve. When the washing process is started, a clean solvent is pumped from the wash tank 34 into the processing tank 31 through the wash tank outlet valve 36, the pump 33, and the processing tank inlet valve 37, and when a certain amount is reached, the valve is switched. The solvent is circulated from the processing tank 31 through a button trap 32, a pump 33, a filter inlet valve 38, a circuit returning to the processing tank 31 through the filter cloth filter 10, and the washing is performed.
The solvent contaminated by 1 is filtered by the filter cloth filter 10 to become a clean solvent and returns to the processing tank 31. When the washing is repeated, the amount of dirt adhering to the filter cloth 11 increases, so that the solvent passage resistance increases, the flow rate of the solvent decreases, and the pressure inside the filter cloth filter 10 increases. When the filter pressure reaches a specified upper limit (for example, 1.8 kgf / cm ² G), it is necessary to clean the filter cloth filter 10 to remove dirt deposited on the filter cloth 11. In order to wash the filter cloth 11, first, the disk-shaped filter cloth 11 is rotated by the motor 46, and the dirt adhering to and deposited on the filter cloth 11 is shaken down into the solvent in the filter tank 13, and the evaporator is continuously rotated. The inlet valve 39 is opened, and the dirty solvent is dropped into the still 35. Normally, a wash tank outlet valve 36 from the wash tank 34,
About half the amount of the solvent is put into the filter tank 13 by the circuit of the pump 33 and the filter inlet valve 37, and the above-described filter cleaning operation is repeated to finish the cleaning. This filter regeneration (washing) step is usually performed automatically by a dedicated program separately from the washing step, and by performing this regeneration step, the filter cloth filter 10 can be used repeatedly.

FIG. 3 is a view showing a filter element 21 of a cartridge type filter cloth filter 20 (FIGS. 5 and 6) using a filter cloth. FIG. 3 (a) is a side sectional view passing through an axis.
FIG. 3B is a sectional view taken along line BB of FIG. In the figure, 22 is a filter cloth of resin fiber, 32 is a holder on both sides, 24
Is a pipe connecting them, the filter cloth 22 has a radial cross section as shown in FIG. 3 (b) to increase the solvent passage area, and the pipe 24 has a large number of holes communicating between the inside and the outside. Connected to solvent outlet. The filter element 21 has the same structure as a filter element (not shown) using a known filter paper, and a detailed description thereof will be omitted.

FIG. 5 is a schematic system diagram of a dry cleaner using the above-mentioned cartridge type filter cloth filter 20 and a cartridge type filter paper filter 20 'using known filter paper connected in series, and omits a wash tank. is there. In this dry cleaner, the solvent being washed always circulates through the processing tank 31, the button trap 32, the pump 33, the filter paper filter 20 ', and the filter cloth filter 20 and returns to the processing tank 31. Dirt of coarse particles (for example, about 30 to 50 μ or more) is first captured by the filter paper filter 20 ′, and dirt of fine particles (for example, about 2.5 to 5 μ or more) is filtered for the filter cloth filter 20 ′.
The filter can be filtered with good cleanliness, reduce the load on the fine filter cloth filter 20, and extend the usable life time as a whole.

FIG. 6 shows a filter cloth filter 20 and a filter paper filter 2.
0 'is a schematic system diagram of a dry cleaner connected in parallel. In the figure, reference numerals 25 and 26, 25' and 26 'denote an inlet valve and an outlet valve of the filter cloth filter 20 and the filter paper filter 20', respectively. In this dry cleaner, at the beginning of the washing process, the solvent is supplied from the treatment tank 31, the button trap 32, the pump 33 to the filter paper filter inlet valve 25 ', the filter paper filter 2 and the like.
0 ', the circuit returning to the processing tank 31 through the filter outlet valve 26' is circulated, and then the valve is switched to switch the processing tank 31, the button trap 32, the pump 33 from the filter cloth filter inlet valve 25, the filter cloth filter 20, The circuit returning to the processing tank 31 through the filter outlet valve 26 is circulated. As a result, stains of coarse particles are removed by the filter paper filter 20 'in the first half, and fine stains are filtered by the filter cloth filter 20 in the second half, and the same effect as in the case of the series connection can be obtained. When the washing process is repeated with these dry cleaners and the filter pressure exceeds a specified upper limit, the filter paper filter element is taken out and discarded, and the filter cloth filter element is washed and reused.

[0007]

In a system using a conventional filter paper filter of a conventional cartridge type or a system using a filter paper filter described in the above-mentioned conventional example, when a certain amount of dirt reaches a certain amount, the filter is replaced with a new one. The used filter is discarded, but there is a problem that replacement is troublesome and disposal of the used toxic remaining filter is troublesome. When the filter cloth filter described above is used, it is necessary to perform a filter regenerating step when the amount of dirt on the filter reaches a certain level. However, if this condition occurs during the daily washing operation, the washing operation is stopped. In addition, there is a problem that when the work is performed after the end of one day so that the washing work time is not reduced, the working time increases. Therefore, an object of the present invention is to solve the above-described problem by performing filter regeneration in parallel during each operation.

[0008]

Accordingly, the present invention provides a processing tank for washing, a tank for containing a solvent, a button trap for removing solid foreign matter, a pump for transporting the solvent,
In a dry cleaner that is provided with a renewable filter cloth filter using a filter cloth and a distillation device that regenerates a dirty solvent, and is mainly used for washing in a processing tank, a button trap, and a circuit that circulates the filter cloth filter, a dry cleaner is provided through an on-off valve. A line connecting the solvent outlet of the filter cloth filter and the button trap is provided, and at the beginning of the washing process, the filter cloth filter is rotated, and a part of the solvent in the soiled filter cloth filter is dropped into the evaporator. After replenishing the amount of clean solvent, circulating between the filter cloth filter and the button trap, and re-adhering the dirt contained in the solvent to the surface of the filter cloth, the solvent in the treatment tank is circulated through the filter cloth filter. This is used as a means for solving the problem. The present invention also provides a processing tank for washing.
And a tank for storing the solvent, and a button for removing solid foreign matter.
Trap, a pump for transporting the solvent, and a filter cloth.
Renewable filter cloth filter and distillation to regenerate dirty solvent
And the solvent outlet and button of the filter cloth filter via the open / close valve
And a pipeline connecting the traps.
Washing in the circuit that circulates the filter and filter
Lye cleaner, filter cloth filter early in the washing process
Rotate to distill part of the solvent in the dirty filter cloth filter.
And refill with the same amount of clean solvent from the solvent tank
Circulate between the filter cloth filter and the button trap to
After reattaching the stain contained in the agent to the surface of the filter cloth,
Solvent in tank is circulated through filter cloth filter
And use this as a means to solve the problem.
It is. Further, the present invention provides a treatment tank for washing, and a solvent.
Storage tank and button trap for removing solid foreign matter
And a pump that transports the solvent and a renewable filter cloth
Filter cloth filter, distiller to regenerate dirty solvent, and opening and closing
Connect the solvent outlet of the filter cloth filter and the button trap through the valve.
And a conduit for connecting
Dry cleaning in a circuit that circulates
Dry cleaning method using a toner,
Washing by pumping a clean solvent from the tank to the treatment tank.
Rinse step and remove some of the solvent in the dirty filter cloth filter
Soluble dropped when the monitor, from the tank through the conduit to the
After replenishing the agent to the filter cloth filter and replenishment is completed
The solvent is the conduit, the button trap and the
Circulates the circuit returning to the filter cloth filter through a pump
The filter regeneration process is performed in parallel, and after that
The solvent in the bath is filled with the button trap, the pump and
Circulate the circuit returning to the processing tank through the filter cloth filter
To carry out the washing process.
This is a means for solving the problem.

[0009]

According to the present invention, a dry cleaner having a rotary filter cloth filter is used, the washing process is divided into front and rear stages, and washing is performed without circulating the solvent in the processing tank at the front stage. The side performs a filter regeneration step, and in the subsequent stage, the washing is continued by switching to a normal circulation circuit for passing the solvent in the treatment tank through the regenerated filter cloth filter. For this purpose, the dry cleaner is provided with a conduit (precoat conduit) connecting the filter cloth filter and the button trap via an on-off valve. Also, the regeneration process of the filter cloth filter is performed relatively frequently every appropriate number of washings, a part of the dirt attached to the filter cloth is dropped together with the solvent into the evaporator, and the remaining dirt is circulated through the precoat pipe. To reattach to the filter cloth.
When the washing process is started, first, a predetermined amount of clean solvent is pumped from a wash tank into a treatment tank by a pump, and washing is started without passing through a filter cloth filter. On the other hand, in the filter cloth filter, the filter cloth is rotated in parallel, the dirt adhering to the filter cloth is shaken down into the solvent, and then the inlet valve of the evaporator is opened for a while to open a part of the dirty solvent in the filter cloth filter. Is dropped into the still, and then the reduced solvent is replaced with a clean solvent. Therefore, the concentration of dirt in the filter cloth filter is reduced by half. The dirt then adheres in a layer to the surface of the filter cloth by the circulation of the solvent through the precoat line, which helps to filter the fine dirt. At this point, the washing process is performed by switching to a normal circulation circuit in which the solvent in the treatment tank is circulated through the filter cloth filter. In the regeneration of this filter cloth filter, only half of the dirt is removed, but it is performed in parallel with the washing step at the beginning of the washing step, and since there is no loss in the washing step time, the number of times of the regeneration can be increased appropriately. The filtration ability can always be kept in a good state.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for regenerating a solvent filter according to the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a dry cleaner. The dry cleaner shown in the figure is almost the same as the conventional one provided with the rotary filter cloth filter shown in FIG. 4, except that the precleaner connects the filter cloth filter 10 and the button trap 32 via a precoat valve (open / close valve) 41. The difference is that the conduit 40 is added, and the same reference numerals are given to the other same components, and the description is omitted. When the washing process is started, a predetermined amount of clean solvent is pumped from the wash tank 34 by the pump 33 into the treatment tank 31 through the wash tank outlet valve 36, the pump 33, and the treatment tank inlet valve 37, and the washing target is washed. The inserted drum (not shown) rotates to start washing. At the same time, the filter cloth filter 10 is
The filter cloth 11 is rotated, and the dirt adhering and depositing on the filter cloth 11 is shaken down into the solvent. Subsequently, the still valve 39 is opened for a while, and a part of the dirty solvent (for example, a half amount) in the filter tank 13 is opened. ) Is dropped to the still 35. Next, a clean solvent is supplied from the wash tank 34 through the wash tank outlet valve 36, the pump 33, and the filter cloth filter inlet valve 38 until the filter tank 13 is filled. Solvent is pre-coated line 4
0, precoat valve 41, button trap 32, pump 3
3 circulates a circuit (pre-coating circuit) returning to the filter cloth filter 10, and the dirt adheres again to the surface of the filter cloth 11 in a tank form and serves as a filter, while the filter pressure is lowered to lower the usable area. Side (for example, about 1.1 kgf / cm ² G). Next, the valve is switched, and the solvent in the processing tank 31 is circulated through the button trap 33, the filter cloth inlet valve 38, the filter cloth filter 10, and returns to the processing tank 31 through the usual filter circulation circuit to continue washing. Thereafter, all steps are completed through the steps of liquid removal, drying, and deodorization. The above steps are performed by automatic operation.

[0011]

As described above in detail, according to the present invention, the regeneration of the filter is performed in parallel with the washing process during the washing process, so that no special time is required for the regeneration of the filter. The working efficiency is improved because the process time is not lost and the operator does not need to worry about the timing of filter regeneration. In addition, the filter cloth filter can be regenerated with a sufficient margin before the filter cloth becomes too dirty to make it difficult to remove the dirt, and the filter can be operated in a place where the filter pressure is sufficiently lower than the limit value. The usable life is long.

[Brief description of the drawings]

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

2A is a side sectional view of a conventional rotary filter cloth filter, and FIG. 2B is a sectional view taken along line AA of FIG. 2A.

3A is a side sectional view of a cartridge type filter cloth filter element, and FIG. 3B is a sectional view taken along line BB of FIG. 3A.

FIG. 4 is a system diagram of a dry cleaner provided with a rotary filter cloth filter.

FIG. 5 is a system diagram of a dry cleaner using a cartridge type filter cloth filter and a filter paper filter in series.

FIG. 6 is a system diagram of a dry cleaner using a cartridge type filter cloth filter and a filter paper filter in parallel.

[Explanation of symbols]

Reference Signs List 11 filter cloth 31 processing tank 32 button trap 33 pump 34 wash tank 35 evaporator 40 pipe connecting filter cloth filter and button trap (pre-coated pipe) 41 opening / closing valve (pre-coated valve)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-259296 (JP, A) JP-A-6-79097 (JP, A) JP-A-5-80493 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) D06F 43/08

Claims (3)

(57) [Claims] 1. A treatment tank for washing, a tank for containing a solvent, a button trap for removing solid foreign matter, a pump for transporting a solvent, a renewable filter cloth filter using a filter cloth, and a dirty filter. In a dry cleaner comprising a distillation device for regenerating the solvent and washing mainly in a processing tank, a button trap and a circuit circulating the filter cloth, a pipe connecting the solvent outlet of the filter cloth filter and the button trap via an on-off valve is provided. At the beginning of the washing process, the filter cloth filter is rotated, a part of the solvent in the dirty filter cloth filter is dropped into the still, and the same amount of clean solvent is replenished from the solvent tank. And the solvent contained in the treatment tank is circulated through the filter cloth filter after the dirt contained in the solvent is reattached to the surface of the filter cloth. How to play data. 2. A processing tank for washing, and a tank for containing a solvent.
Ink, a button trap to remove solid foreign matter, and a solvent.
Pump to transport and filter cloth renewable using filter cloth
And a distiller that regenerates the dirty solvent and an on-off valve
Line connecting the solvent outlet of the filter cloth filter and the button trap
And a processing tank, button trap, filter cloth
A dry cleaner that is washed in a circuit that circulates
And rotate the filter cloth filter at the beginning of the washing process,
Drop some of the solvent in the filter cloth into the still,
Refill with the same amount of clean solvent from the
Circulate between the traps to filter out dirt contained in the solvent.
After re-adhering to the surface of the cloth, the solvent in the treatment tank is
Dry creepage characterized by circulation through
Na. 3. A treatment tank for washing and a tank for containing a solvent.
Ink, a button trap to remove solid foreign matter, and a solvent.
Pump to transport and filter cloth renewable using filter cloth
And a distiller that regenerates the dirty solvent and an on-off valve
Line connecting the solvent outlet of the filter cloth filter and the button trap
And a processing tank, button trap, filter cloth
Using a dry cleaner to wash in the circuit circulating the filter
Dry cleaning method , Clean the tank
A washing step performed by pumping a clean solvent into the treatment tank,
When a part of the solvent in the dirty filter cloth filter is dropped into the still
In both cases, the solvent is filtered from the tank through the pipe.
Replenish the cloth filter, and After the replenishment is completed, the solvent
Through the line, the button trap and the pump.
Filter circulating through the circuit returning to the filter cloth filter
The production process is performed in parallel, and then the melting process in the treatment tank is performed.
The agent to the button trap, the pump and the filter cloth.
Circulating a circuit returning to the processing tank through a filter.
Dry cleaning characterized by carrying out a washing process
Method.