KR20170090727A

KR20170090727A - The apparatus and method of recycling the solvent for washing paint remaining in the paint manufacturing line

Info

Publication number: KR20170090727A
Application number: KR1020160011425A
Authority: KR
Inventors: 배문길; 배창준
Original assignee: 배문길; 배창준
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2017-08-08
Also published as: KR102024143B1

Abstract

The present invention relates to a recycling device and method of a solvent for cleaning paints remaining in a paint manufacturing line, and more specifically, to a recycling device and method of a solvent for cleaning paints remaining in a paint manufacturing line which does not dispose organic solvents in a large quantity for cleaning paints remaining a raw material supplying line manufacturing paints, and recycles the same as a repetitive cleaning use, such that a purchasing cost for organic solvents and a disposal cost can be reduced. The recycling device of a solvent for cleaning paints remaining in a paint manufacturing line comprises: multiple raw material tanks which is opened and closed by a supply valve; a solvent tank which stores a solvent and is opened and closed by the supply valve; a supply line which is connected to the raw material tanks and the solvent tank, and supplies paint raw materials and the solvents by means of a discharging pump; a mixer which mixes the paint raw materials and the solvent supplied from the supply line; an air valve which is connected to the supply line to discharge a remaining paint by means of air; and a discharging valve which discharges the paint mixed in the mixer. The supply line of the paint manufacturing device is connected to a recycling system for cleaning solvents, such that solvents cleaned the remaining paint can be recycled.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for recycling a paint cleaning solvent remaining in a paint manufacturing line,

The present invention relates to an apparatus and a method for recycling a solvent for cleaning a paint remaining in a paint manufacturing line, and more particularly, to a method of recycling a solvent for cleaning a paint, The present invention relates to an apparatus and a method for recycling a solvent for cleaning paints, which are remained in a paint manufacturing line that can be recycled for recycling and recycling, thereby reducing the cost of purchasing organic solvents and treating waste solvents.

In general, the paints are prepared by mixing resins, pigments, optional pigment extenders, and organic solvents and blending them with an antifoaming agent, an adhesion promoter, a plasticizer, a thickener, a nonfunctional fluidity modifier, a solvent, a drying agent, an anti- Additives such as dispersants and additives are added.

When such a raw material is blended and applied to a surface to be painted, the paint is dried by evaporation of a solvent or water, and the resin forms a coating film containing pigment and extender particles.

In the paint manufacturing plant, as shown in FIG. 1, the raw materials and the solvent of the paint are put into respective raw material tanks and solvent tanks and connected to one supply line, and raw materials supplied from each tank are supplied as a discharge pump to a supply line And then mixed and discharged to a raw material storage container.

It is necessary to cleanly remove the remaining amount of paint remaining in the supply line and the blender when preparing paint of a different color after manufacturing the paint of a certain color by the above method.

In this process, an organic solvent is used to remove the residual amount of paint. In order to completely remove the paint remaining in the supply line, a large amount of solvent is continuously injected and discharged. A large amount of solvent recovery tower required for recovering a large amount of waste solvent was required, and the process of disposal by a wastewater treatment facility was complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to solve the above-mentioned problems, and to provide a paint cleaning solvent for recycling a paint material which remains in a blender, And to provide a recycling apparatus of the recycling apparatus.

It is another object of the present invention to reduce non-economic waste due to disposal of reusable organic solvents by reusing the solvent having cleaning power even after washing the paint raw material remaining in the supply line and the mixer, thereby reducing the purchase cost of the solvent Another object of the present invention is to provide a method of recycling a solvent for cleaning a paint remaining in a paint manufacturing line for obtaining an economical benefit.

In order to achieve the above object, according to the present invention, there is provided an apparatus for supplying a paint material, comprising: a plurality of raw material tanks,

A solvent tank which stores a solvent and opens and closes as a supply valve;

A supply line connected to the raw material tank and the solvent tank to supply the raw material of the paint and the solvent by the discharge pump;

A mixer for mixing the paint raw material and the solvent supplied from the supply line;

An air valve connected to the supply line for discharging paint residue as air, and an air tank

And a discharge valve for discharging the paint blended in the blender,

Wherein a solvent recycling system for cleaning is connected to a supply line of the paint manufacturing apparatus so as to recycle the solvent from which the residual paint has been washed, thereby providing an apparatus for recycling the solvent for cleaning the paint remaining in the paint manufacturing line .

The cleaning solvent recycling system according to the present invention may further include a recovery line connected between the mixer and the discharge valve to recover used solvent,

A recovery tank connected to the recovery line for storing the recovered solvent,

A recovery valve connected to the recovery line for opening and closing the recovery line,

A circulation line connected to the recovery tank for re-supplying the recovered solvent to a supply line by a discharge pump,

A circulation valve connected to the circulation line for opening and closing the circulation line

And a discharge line connected to the recovery tank and provided with a discharge valve for discharging the desorbed waste solvent. The apparatus for recycling a solvent for washing a paint remaining in a paint manufacturing line is characterized in that the apparatus for recycling a solvent is provided. .

The present invention also provides a device for recycling a solvent for cleaning paint, which remains in a paint manufacturing line equipped with a turbidity sensor for detecting the turbidity of the cleaning solvent circulated in the recovery tank and a water level sensor for detecting the level of the solvent do. .

The present invention relates to a method and apparatus for supplying a high-pressure air in a state in which a cleaning solvent recycling system is shut off to discharge paint remaining in a supply line and a mixer through air as an air;

The solvent in the solvent tank is continuously supplied as a discharge pump to the supply line to dilute the paint remaining in the supply line and the mixer as a solvent and discharge the solvent to the discharge valve and discard the solvent;

After the solvent cleaning, the discharge valve of the supply line is closed, the solvent of the solvent tank is continuously supplied by the pressure of the discharge pump while the recovery line and the circulation valve of the cleaning solvent recycling system are opened, and the paint remaining in the supply line and the blender And then stored in the recovery tank until a constant height is reached;

When the cleaning solvent stored in the recovery tank is stored at a predetermined level, the supply valve of the solvent tank is closed, and the cleaning solvent stored in the recovery tank is circulated to the supply line again through the circulation line for a predetermined time by the discharge pump, Removing the paint remaining in the blender;

After the above step is completed, clean solvent is supplied from the solvent tank through the discharge pump through the supply line and the mixer to the discharge valve in a state where the cleaning solvent recycling system is shut off, then the supply of solvent is cut off, Removing the finish;

The present invention provides a method for recycling a solvent for cleaning a paint remaining in a paint manufacturing line.

In the present invention, the turbidity of the cleaning solvent recovered in the recovery tank is sensed by the turbidity detection sensor, and when the cleaning solvent becomes turbid over a certain turbidity, the reuse is stopped and the discharge valve is opened in a state where the operation of the discharge pump is stopped And discharging the contaminated solvent which can not be reused through the discharge line to perform a disposal process. The method of the present invention is characterized by providing a method of recycling a solvent for washing a paint remaining in a paint manufacturing line.

According to the present invention, since it is possible to recycle the paint raw material supply line and the mixer to use for washing and washing again without rubbing the spent cleaning solvent, it is possible to reduce the consumption amount of the solvent, And the use amount of the solvent is reduced, so that the facility for treating the waste solvent and the cost can be reduced, which is economically effective.

1 is a schematic view showing a conventional paint manufacturing process
2 is a block diagram of an entire configuration of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention and thus various examples that can be substituted at the time of application .

(2), (3), (4), (5) and (6), as shown in FIG. 2, opened and closed as a supply valve 1 by storing a ladle, a pigment, an additive and the like;

A solvent tank 7 storing a solvent and being opened / closed as a supply valve 1 ';

A supply line 9 to which the raw material tanks 2, 3, 4, 5 and 6 and the solvent tank 7 are connected to supply the raw material of the paint and the solvent by the discharge pump 8;

A mixer (10) for mixing the paint raw material supplied from the supply line (9) with a solvent;

An air valve 11 connected to the supply line 9 for discharging paint residue as air, an air tank 12,

And a discharge valve (13) for discharging the paint blended in the mixer (10)

The cleaning solvent recycling system 100 may be connected to the supply line 9 of the paint manufacturing apparatus to recycle the solvent that has washed the flow paint.

The cleaning solvent recycling system 100 is configured as follows.

A recovery line 14 connected between the mixer 10 and the discharge valve 13 for recovering used solvent,

A recovery tank 15 connected to the recovery line 14 for storing the recovered solvent,

A recovery valve (16) connected to the recovery line (14) for opening and closing the recovery line (14)

A circulation line 17 connected to the recovery tank 15 for supplying the recovered solvent to the supply line 9 by the discharge pump 8,

A circulation valve 18 connected to the circulation line 17 for opening and closing the circulation line 17,

And a discharge line (20) connected to the recovery tank (15) and provided with a discharge valve (19) for discharging desorbed waste solvent.

In addition, the recovery tank 15 is provided with a turbidity sensor 21 for detecting the turbidity of the circulating solvent and a water level sensor 22 for detecting the level of the solvent.

In the present invention constructed as described above, a separate cleaning solvent recycling system 100 is connected to the paint raw material supply line 9 to store the used solvent in the recovery tank 15 through the recovery line 14 without discarding And is recycled to the supply line 9 through the circulation line 17 and is repeatedly supplied as the recovered solvent to clean the supply line 9 and the mixer 10 to maximize the function of the solvent The cleaning solvent recycling system 100 of the present invention includes a recovery line 14 for recovering a largely used solvent, a recovery tank 15 for storing the recovered cleaning solvent, a solvent stored in the recovery tank 15 And a circulation line 17 circulatingly supplied to the supply line 9.

A turbidity sensor 21 for detecting the turbidity of the solvent and a water level sensor 22 for detecting the level of the solvent are installed in the recovery tank 15 to sense whether the solvent is reused or not by the turbidity sensor 21, The waste solvent which has been recycled to such an extent that it can not be reused can be discarded through the discharge valve 19 of the discharge line 20.

Describing the recycling process of the solvent using the cleaning solvent recycling system 100 of the present invention,

First, when the first washing process is performed after the paint is manufactured, the washing solvent recycling system 100 of the present invention is not used, but the cleaning process is performed as usual, but the raw material tanks 2, 3, 4 5) 6, the supply valve 1 'of the solvent tank 7, the recovery line 14 of the cleaning solvent recycling system 100, the recovery valve 16 of the circulation line 17 and the circulation valve 18 Only the discharge valve 13 of the supply line 9 is opened and the high pressure air is primarily supplied from the air tank 12 for about 5 minutes to the supply line 9 and the mixer 10 And the remaining paint is discharged as high-pressure air through the blow-off valve 13.

The supply valve 1 'of the solvent tank 7 is opened and the solvent is supplied to the supply line 9 as the discharge pump 8 so as to be supplied to the supply line 9 and the mixer 10 The residual paint is diluted as a solvent and washed. In this case, the solvent is continuously supplied for about 5 minutes, and the waste is discharged to the waste tank (not shown) through the discharge valve 13.

The solvent to be initially supplied and cleaned as described above is not easy to reuse because it contains a large amount of paint residues and is thus desirably discarded after one use.

A recovery valve 16 for closing the discharge valve 13 of the supply line 9 and opening and closing the recovery line 14 of the cleaning solvent recycling system 100 when the primary solvent cleaning is completed, The solvent in the solvent tank 7 is continuously supplied with the pressure of the discharge pump 8 while the circulation valve 18 is opened to clean the paint remaining in the supply line 9 and the mixer 10 At this time, the residual paint is washed, and the repellent agent is stored in the recovery tank 15 until reaching a certain height in the recovery tank 15 through the recovery valve 16 since the discharge valve 13 is closed.

Here, the recovery solvent stored in the recovery tank 15 is a relatively clean solvent that is less contaminated than the primary cleaning solvent and is stored at a certain level in the recovery tank 15, so that the supply valve 1 'of the solvent tank 7 is closed The supply of clean cleaning solvent is stopped and at the same time the recovered cleaning solvent stored in the recovery tank 15 is circulated continuously through the circulation line 17 to the supply line 9 for a predetermined time by the discharge pump 8, The residual paint on the paint manufacturing line, such as the blender (9) and the blender (10), is diluted with a recovery solvent and cleaned thoroughly.

The cleaning solvent collected in the recovery tank 15 in the process of recovering the used solvent senses turbidity through the turbidity detection sensor and determines whether or not to recycle. When the cleaning solvent is turbid or more turbid, the reuse is stopped The discharge valve 19 is opened in a state where the discharge pump 8 is stopped, and the contaminated solvent which can not be reused is discharged through the discharge line 20 to be disposed of.

The paint remaining on the supply line 9 and the mixer 10 by the circulating and reused recycled solvent is almost completely cleaned but the paint remaining on the discharge valve 19 side is more thoroughly washed The operation of the cleaning solvent recycling system 100 is performed in such a manner that clean solvent is supplied from the solvent tank 7 through the discharge pump 8 through the supply line 9 and the mixer 10, The remaining air in the supply line 9, the mixer 10 and the discharge valve 19 is cleaned once again and finally the air valve 11 is opened in this state, When the high-pressure air stored in the nozzle 12 is sprayed to the supply line 9 and the mixer 10, the paint remaining in the paint manufacturing line is completely removed, will be.

Accordingly, the present invention can reduce the solvent cost by drastically reducing the amount of solvent that is continuously supplied to clean the paint remaining in the paint manufacturing line, Which is very economical.

1, 1 ': Supply valve 2, 3, 4, 5, 6: Raw material tank 7: Solvent tank 8: Discharge pump 9: Supply line 10: Mixer 11: Air valve 12: Air tank 13: Discharge valve 14: 15: Recovery tank 16: Recovery valve 17: Circulation line 18: Circulation valve 19: Discharge valve 20: Discharge line 21: Turbidity sensor 22: Water level sensor 100: Recycling system

Claims

A plurality of raw material tanks 2, 3, 4, 5, and 6 that store paint raw materials and are opened and closed as supply valves 1;
A solvent tank 7 storing a solvent and being opened / closed as a supply valve 1 ';
A supply line 9 to which the raw material tanks 2, 3, 4, 5 and 6 and the solvent tank 7 are connected to supply the raw material of the paint and the solvent by the discharge pump 8;
A mixer (10) for mixing the paint raw material supplied from the supply line (9) with a solvent;
An air valve 11 connected to the supply line 9 for discharging paint residue as air, an air tank 12,
And a discharge valve (13) for discharging the paint blended in the mixer (10)
Wherein the cleaning solvent recycling system (100) is connected to the supply line (9) of the paint manufacturing apparatus so that the solvent that has washed the residual paint can be recycled. Recycling device.

The system of claim 1, wherein the cleaning solvent recycling system (100) comprises a recovery line (14) connected between the mixer (10) and the discharge valve (19)
A recovery tank 15 connected to the recovery line 14 for storing the recovered solvent,
A recovery valve (16) connected to the recovery line (14) for opening and closing the recovery line (14)
A circulation line 17 connected to the recovery tank 15 for supplying the recovered solvent to the supply line 9 by the discharge pump 8,
A circulation valve 18 connected to the circulation line 17 for opening and closing the circulation line 17,
And a discharge line (20) connected to the recovery tank (15) and provided with a discharge valve (19) for discharging the turbid solvent discharged from the paint tank (15).

The paint washing apparatus according to claim 2, further comprising a turbidity sensor (21) for detecting the turbidity of the cleaning solvent circulated to the recovery tank (15) and a water level sensor (22) Recycling apparatus for solvent.

Discharging the remaining paint in the supply line (9) and the mixer (10) as air through the discharge valve (13) while supplying the high pressure air in a state where the cleaning solvent recycling system (100) is shut off;
The solvent in the solvent tank 7 is continuously supplied to the supply line 9 as the discharge pump 8 to dilute the paint remaining in the supply line 9 and the mixer 10 as a solvent and clean Discharging to the discharge valve (13) and discarding it;
After the solvent cleaning, the discharge valve 13 of the supply line 9 is closed and the recovery line 14 of the cleaning solvent recycling system 100 and the circulation valve 18 are opened. The paint remaining on the supply line 9 and the mixer 10 is washed by the pressing force of the discharge pump 8 to be conveyed to the recovery line 14 through the recovery valve 16, Until a constant height is reached;
When the cleaning solvent recovered and stored in the recovery tank 15 is stored at a certain level, the supply valve 1 'of the solvent tank 7 is closed and the cleaning solvent stored in the recovery tank 15 is circulated through the circulation line 17 Again circulating for a predetermined time by the discharge pump (8) to the supply line (9) to remove the paint remaining in the supply line (9) and the mixer (10);
After the above step is completed, clean solvent is supplied from the solvent tank 7 through the discharge pump 8 in a state where the cleaning solvent recycling system 100 is shut off, and the solvent is discharged through the supply line 9 and the mixer 10 Discharging the solution to the valve (13), shutting off the supply of the solvent, spraying air to remove the final finishing;
Wherein the solvent is present in the paint manufacturing line.

The washing machine according to claim 4, wherein the turbidity of the cleaning solvent recovered in the recovery tank (15) is sensed by a turbidity detection sensor, and when the cleaning solvent becomes turbid more than a certain turbidity, the reuse is stopped and the operation of the discharge pump And discharging the contaminated solvent which is not reusable through the discharge line (20) to perform disposal treatment, characterized in that the method further comprises a step of recycling the solvent remaining in the paint manufacturing line Way.