JPS5845881B2 - Mechanism for removing solvent residue in used filters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for efficiently removing residual solvent from used filters in a solvent residual removal mechanism that is installed in the overflow circuit for solvents used for cleaning drying machines. It can be easily removed in a short time, and there is no need to take out the used filter and put it in special equipment to remove the solvent residue, so you can simply throw away the filter and it will not cause any pollution.
In addition to being easily disposed of as general waste, the residual amount of the removed solvent can be recycled and reused, improving the cleaning efficiency of the dryer, benefitting the recovery of expensive solvents, and having a simple configuration. This invention relates to a highly economical mechanism for removing residual solvent from used filters.

A considerable amount of solvent remains on the activated carbon and P paper in filters that were conventionally used for solvent cleaning work, and it is technically difficult to remove this residual solvent, which requires time, effort, and cost. Therefore, the filter was thrown away, but since it still contains a considerable amount of solvent residue, it cannot be disposed of as general waste because it is subject to pollution as industrial waste containing flammable and dangerous substances. It took a considerable amount of time and money to dispose of it.

In addition, expensive solvents were lost as filters with residual solvent were discarded.

The present invention was developed to overcome the above-mentioned difficulties, and it purifies the solvent used for washing clothes in the drying machine, recovers the solvent, regenerates it, and puts it into the drying machine to circulate the solvent. In the solvent recovery device used for cleaning the dryer, the remaining solvent is removed from the filter 1 that has been used for cleaning the solvent by removing the residual solvent that is still stuck to the filter 1. It can be efficiently removed in a short time from the filter in the mechanism as it is.
Even if the filter has no residual solvent, it can be disposed of as general waste without worrying about pollution, and it also helps in recovering the solvent, preventing wasteful loss of solvent and improving the work efficiency of the dryer. An object of the present invention is to provide an inexpensive device for removing solvent residue from used filters.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. The present invention is characterized in that the solvent used for washing clothes in a drying machine is passed through a pipe 18, and a layer of activated carbon 3 is added to the inside, and a number of folds are folded around the layer of activated carbon 3. The filtered solvent is put into a replaceable cartridge filter 1 provided with a layer of waste paper 4, and then the solvent is passed through a pipe 16 and then exited from an outlet 10 to collect the solvent in a cyclical manner for use in cleaning the drying machine. In the apparatus, a front lid 1 has a filter pressing pedestal 1d integrally attached to the front end of a peripheral wall 1a' formed in a cylindrical shape on the back side thereof.
b' is provided, and a housing 'la' is provided with a sealed inner cavity 1c to which a lid 1b" which can be opened and closed is attached to the rear end of the peripheral wall 1a', and a front lid 1b' and a pedestal 1d are tightly penetrated. Housing 1
a core tube 2 which is introduced into a core tube 2 and has a number of holes 2a on its circumferential surface to which the filter 1 can be attached and detached;
After the solvent inside the housing 1a is removed through a pipe 15, pressurized air or heated steam at a temperature higher than the boiling point of the solvent is selectively introduced into the core tube 2. The outlet pipe 9 communicates with the pipe 15 formed to blow into the filter 1 through the lumen 1c and is led out from the housing 1a, and the vaporized solvent residue and steam are sent to the solvent regeneration mechanism. The solvent residue removal mechanism in the used filter consists of an inlet pipe 8 to be fed.

In FIG. 1, if the right side of FIG. 1 is the front, there is a filter pressing pedestal (hereinafter abbreviated as pedestal) on the back side.

) 1d is attached, and a cylindrical peripheral wall 1a' connected to the rear thereof is provided, and the lid 1b" is opened via a wing nut 1g to the mouth edge 1a" at the rear end. , a housing 1a is formed which is closedably attached and has a sealed inner cavity 1c.

An outlet pipe 9 is introduced into the inner cavity 1c from the outside through tightly penetrating the front cover 1b' and the pedestal 1d, and multi-directional holes 2a are provided in each direction on the outer periphery to be integrally connected to this and pass through the inside. , a hollow core tube 2 with a thread 2C is provided on the outer periphery of the small diameter portion 2b at the rear end.

Of course, the outlet tube 9 and the core tube 2 may be formed into one tube.

Activated carbon 3 surrounds the core tube 2 between the contact plate 1b applied to the pedestal 1d and the contact plate 1b applied to the stepped portion 2d of the small diameter portion 2b.
P-paper 4 which is made by overlapping the layers on the outside and folding many folds
The layers are stacked one on top of the other and tied together, and then attached via the washer 1e to the small diameter portion 2b with a wing nut 1f, and then the activated carbon layer, the recycled paper layer, the backing plate 1b, 1b, washer, screw nut 1f, etc. A cartridge filter 1 (hereinafter simply referred to as filter 1) consisting of:

) is not the gist of the present invention, but this filter 1 is attached and removably attached to the core tube 2 in order to allow the solvent to pass through and to remove residual solvent after use.

Housing 1a. The inlet pipe 8, the pipe 15, the outlet pipe 9, the core pipe 2, the steam inlet 5', the pressurized air port 5'', the valve 6, etc. are collectively referred to as a solvent residue removal mechanism in the used filter.

When replacing the filter 1, loosen the butterfly nut Ng, open the lid 1b'', remove the cover plate 1b, discard the filter 1, and replace it with a new filter.

Although it is not the gist of the present invention, to explain the circulation of the drying machine and the solvent related to the mechanism of the present invention, the used solvent a after washing clothes by operating the drying machine is removed from the inlet 5 by opening the valve 6 and using the check valve. 1 and enters the housing 1a from the inlet pipe 8.

The inside of the casing 1a is filled with solvent (used).

At this time, when pouring the solvent into the casing, an air bleed cock (not shown) provided in the casing is opened little by little, and when the casing is full, the air bleed cock is closed.

The drying machine is operated, and the material that has passed through the filter 1's waste paper 4 and activated carbon 3 is passed through the inlet pipe 9 to the valve and the pipe 16 with a check valve to the outlet 10, and then enters the drying machine and circulates it. .

The dryer is now constantly replenished with fresh purified solvent a.

After the dryer has finished operating, open the air bleed cock to remove the solvent from the housing.

After the removal, the work of the mechanism of the present invention is to remove the remaining solvent from the filter 1.

The structure in which the drying machine and new solvent enter the drying machine, and the used solvent discharged from the drying machine is passed through a filter and re-entered into the drying machine is not the gist of the present invention.

As mentioned above, the used solvent is passed through the filter 1 by operating the dryer, but since even a single grain of activated carbon has a cleaning ability and the filter as a whole has a certain amount of processing capacity, it is possible to limit the amount of solvent used. Excess solvent must be discarded.

Therefore, after stopping the operation of the drying machine and closing the valve of the pipe 18 to eliminate the solvent in the housing, firstly, pressurized air d is introduced from the inlet 5'' to the outlet pipe 9 from the pipe 15, and then the core pipe 2
The solvent liquid in the filter 1 is radially discharged from the center of the filter 1 through the hole 2a through the activated carbon 3 and the U paper 4, and the solvent liquid is introduced into the tank 14 through the drain 13.

However, since the residual amount of solvent stuck to the activated carbon 3 cannot be easily removed by air blowing, heated steam at a temperature higher than the boiling point of the solvent being used is similarly applied from the pipe 15 into the core pipe 2 from the center of the filter in all directions in the radial direction. By spraying in this direction, the remaining solvent in the activated carbon 3 and the E paper 4 is vaporized together with the heated steam and completely expelled.

That is, during the operation of the drying machine, the filter 1 plays the role of cleaning the solvent, but it also serves as a mechanism for removing the solvent residue by removing the solvent in the housing 1a. There is no need to provide a separate mechanism, making it extremely economical.

In FIG. 2, three filters 1 are connected in parallel to form a solvent recovery circuit.

First, this circuit shows a case in which three filters 1 are arranged in parallel, and pressure air d from an air volume 5 is introduced into the core pipe 2 of each filter 1 through the valve 6 and check valve 7 to eliminate the residual solvent. This is to remove the portion.

5' is the inlet of heated steam to similarly vaporize the residual solvent.

The circuits and mechanisms indicated by broken lines are not the gist of the present invention.

When steam b1 air d is blown into filter 1, the valves at inlet 5 and outlet 10 in the excess flow path of solvent a and check valve are closed.

Exceptionally, when the amount of steam drain increases, the valve 6A is opened to let air into the separator 12.

Incidentally, the filter mechanism may be increased or decreased, or any other design changes other than those described in the specification and drawings of the present application may be freely made within the scope of the spirit of the invention of the vehicle.

The gist of the present invention is the above configuration, and a filter pressing pedestal 1d is provided on the front end of a cylindrical peripheral wall 1a' having an inlet pipe 8 which is led out to the outside and is always closed with a valve.
A front lid 1 with b' and a lid 1 that can be opened and closed at the rear end.
b", and a front cover 1b from the outside.
An outlet pipe 9 is introduced through the core pipe 9 and a core pipe 2 is integrally connected to the rear part of the core pipe 2 and has multidirectional holes 2a on the outer periphery. Since a pipe 15 communicating with the pipe 9 is provided, the solvent liquid in the housing 1a is removed, and pressurized air is first forced into the filter to remove the residual solvent in the filter. Since the residual components are not easily removed, the residual components of the solvent are vaporized and completely removed by introducing heated steam higher than the boiling point of the solvent.

Heated steam above the boiling point of air or solvent is sent into the core tube 2 at the center, so many holes 2a are provided in all directions around the outer circumference of the core tube 2, so even if the core tube 2 falls over, air and heat can be distributed radially in multiple directions. Since the steam permeates throughout the filter 1 and is ejected, the residual solvent in the filter 1 can be efficiently removed in a short time.

A housing 1a that connects an inlet pipe 8, a core pipe 2, an outlet pipe 9, a pipe 15, etc., attaches a filter 1 to the core pipe 2, removably attaches it, and installs it in the exit path of the solvent of the drying machine. After the solvent is cleaned in that state, the solvent in the housing 1a can be removed, and the residual solvent in the filter 1 can be completely removed in that state. Since it can be used as a mechanism for removing solvent residue in used filters, there is no need to provide a special mechanism to remove only the filter and remove solvent residue, so unnecessary effort, time, and manpower are saved. The dog is extremely economical.

Furthermore, even if the filter 1 from which the solvent residue has been removed is disposed of as is, there is no fear of pollution and it can be easily disposed of as general waste, making it highly economical.

The filter 1 can be used as a cartridge by opening the lid 1b'' and removing the solvent residue while the filter is still in the device, so you can remove the used filter and use a special device to remove the solvent residue. The practical benefits are that time, effort, manpower, and expenses are saved, the operation of the drying machine has less downtime, the workability of the drying machine can be improved, the overall structure is simple, it is easy to manufacture, and it can be manufactured at a low cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a mechanism for removing solvent residue in a used filter of the present invention, and Fig. 2 is an explanatory diagram of the mechanism for removing solvent residue in a used filter of the present invention when used in parallel. It is. a...Solvent, b...Steam, C...
...Cooling water, d...Air, 1...Cartridge filter, 1a...Casing, 1a'.
...Peripheral wall, 1a''...Top edge, 1C...
...Inner cavity, 1b, 1b...Plate, 1b'...
...Front lid, 1b" ...Lid, 1d...
・Filter pressing pedestal, 1f, 1g...wing nut, 2...core tube, 2a...hole, 2b
...small diameter part, 2c...screw engraving, 2d...
...Stepped portion, 3...Activated carbon, 4...
F paper, 5...Inlet, 5'...Steam inlet, 5"...Air inlet, 6...Valve,
6'...Drain valve, 7...Check valve, 8...Inlet pipe, 9...Outlet pipe, 10...・Outlet, 11... Condenser, 12... Separator, 13...
Drain, 14...Tank, 15.16,17
゜18.19...Pipe.

Claims (1)

[Claims] 1 Pipe 1 of the solvent used to wash clothes in the dryer
The solvent is passed through the pipe 16 into a replaceable cartridge filter 1, which has a layer of activated carbon 3 on the inside and a layer of paper 4, which is surrounded by a number of pleats.
In the solvent recovery device, the solvent is recycled through the outlet 10 for use in cleaning the drying machine, and a filter is integrally pressed against the front end of the peripheral wall 1a' formed in a cylindrical shape on the back side thereof. A housing 1a is provided with a front lid 1b' to which a pedestal 1d is attached, and a housing 1a is provided with a sealed inner cavity 1c to which a lid 1b" which can be opened and closed is attached to the rear end of the peripheral wall 1a'. The front lid 1b' and the pedestal 1d are A core tube 2 is introduced into the housing 1a through a dense passage, and has a large number of holes 2a on its circumferential surface, to which the filter 1 is attached and removably attached, and the housing is connected in communication with the core tube 2. 1a, and after removing the solvent in the housing 1a through the pipe 15, selectively pressurized air or heated steam at a temperature higher than the boiling point of the solvent is passed through the core pipe 2 to the filter 1.
An outlet pipe 9 communicates with a pipe 15 formed to blow into the interior, and an inlet pipe 9 communicates with the inner cavity 1C and leads out of the housing 1a and sends the vaporized solvent residue and steam to the solvent regeneration mechanism. A mechanism for removing solvent residue in a used filter, consisting of a tube 8.