KR20240051089A - Removal Method for Graffiti and Dirt using Natural Silica Sand - Google Patents

Abstract

The present invention relates to a technology for removing graffiti, moss, and contamination from stones, stone objects, and wood using natural silica sand, using a natural silica sand high-pressure spraying system without damaging the surface without using chemicals or tools. It has the advantage of being able to easily remove natural silica sand by spraying it at high pressure to restore the original state of stones, stone objects, and wood. Therefore, unlike before, environmental damage can be prevented, the safety and health of the operator can be protected, and the surface of the wood or stone is not damaged or damaged as abrasive tools are not used, and the unevenness of the wood or stone ( It is very practical as it can even remove graffiti and contamination from concave and convex areas. In addition, large amounts of graffiti, moss, and contamination can be removed quickly without mobilizing as many workers and labor as in the past, and the natural silica sand used as the main material is very economical because its purchase price is very cheap and it can be recycled. .

Description

{Removal Method for Graffiti and Dirt using Natural Silica Sand}

The present invention is a method of removing graffiti and contamination using natural silica sand, and more specifically, the lacquer spray graffiti applied to stone walls made of marble, granite, etc. in cultural heritage facilities, or stone objects such as stone pagodas and monuments. It is about a technology to remove contamination by mold or foreign substances from stone moss and Hanok wood, etc., using only natural silica sand under high pressure without damaging the surface without using chemicals or polishing tools as in the past. This is a technology that sprays to remove graffiti, moss, and pollution in an eco-friendly and more effective way.

Lacquer spray graffiti applied to stone walls made of marble, granite, etc. of cultural property facilities not only lowers the value of the cultural property, but also deteriorates its aesthetics, and there is a strong need to quickly and completely remove it, and there is a strong need to remove it quickly and completely. There is a need to remove old stains and stone moss that form on stone objects and disturb their aesthetics and lose their original appearance, thereby restoring them to their original state. Recently, as the preference for Hanok has increased, mold and foreign substances that occur in wood, the main material of Hanok, have been removed. There is a strong need for decontamination, so there is an urgent need for a method to quickly and effectively remove graffiti, moss, and contamination.

Graffiti, stone moss, old grime, and contamination occur on old stone pagodas, stone structures, and wooden cultural assets, causing many cultural assets to lose their original form and value, and disfiguring the aesthetics of visitors. However, there is no effective technology or method to solve this problem. It is being left as is.

When removing graffiti, moss, mold, contamination, etc. from stones, stones, wood, etc., conventionally, it took a lot of money, manpower, and time to use chemicals containing hydrochloric acid. Methods were used to remove it chemically using decontaminants or detergents, or mechanically using an abrasive tool such as a grinder. However, these methods cannot be completely removed and cause environmental damage and affect the safety of workers. In addition to harming health, there is a problem of causing chemical damage to contaminated wood or graffitied stone. When mechanically removed with an abrasive tool, it not only damages and damages the surface of wood or stone, but also creates irregularities. Graffiti or contamination deep inside the part cannot be removed because it is impossible for a tool to enter, and if polishing is done forcibly, there is a problem that it can lead to unsightly results.

Accordingly, the need for a new technology to replace the conventional method has emerged, and the present invention sprays only natural silica sand at high pressure on areas where graffiti, moss, and contamination occur, and uses the frictional force to remove graffiti, moss, and contaminated areas. It concerns a peeling and removal technology, and there are no health problems for workers or environmental damage caused by chemicals like in the past, and graffiti deep into uneven areas without causing chemical or mechanical damage to wood or stone. It is a new technology that can even remove contaminants, and is an environmentally friendly and effective method that is more advantageous than conventional methods.

Korea Intellectual Property Office Application No. 10-2010-0081211

Conventionally, when removing graffiti, moss, contamination, etc., a lot of money, manpower, and time were spent to remove them chemically using decontamination removers or cleaners containing chemicals such as hydrochloric acid, or by using abrasive tools such as grinders. Therefore, mechanical removal methods were used, but these methods not only cause environmental damage and harm the safety and health of workers, but also cause chemical damage to contaminated wood or graffitied stones, and have problems with polishing tools. In case of mechanical removal, the surface of wood or stone is damaged or damaged, and graffiti or contamination deep in the uneven part cannot be removed, so if the work is forced, the result is rather unsightly. There is.

The present invention was designed to solve these conventional problems, and it uses natural silica sand to completely restore the original state of graffiti, moss, and contaminated stone or wood without using chemicals, machines, or tools. By spraying at high pressure, it not only provides a method of restoring the original appearance by peeling and removing graffiti, moss, and contaminated parts from wood or stone using friction without causing damage to the surface, but the removal itself was previously impossible. The purpose is to provide a method to restore the original appearance by completely removing deep uneven parts or parts that have a complex structure that cannot be accessed by a polishing tool.

As mentioned above, only natural silica sand is used to peel and remove only the contaminants and graffiti from wood or stone, so there are no health problems for workers or environmental damage caused by chemicals, and they do not cause chemical or mechanical damage to wood or stone. It is a new technology that replaces conventional chemical and mechanical removal methods with environmentally friendly and physical methods that are more advantageous in terms of environmental and efficiency.

In order to achieve the above object, the present invention sprays natural silica sand at high pressure on graffitied stones, stone objects covered with moss, etc., and contaminated Hanok wood, thereby removing the stone, stone objects, and wood from the stone, stone objects, and wood by the friction force without causing damage to the surface. The purpose is to restore the original appearance by effectively and completely peeling off and removing only the graffiti, moss, and contaminated areas. To achieve this, first, a certain type of natural silica sand high-pressure spraying system that can spray natural silica sand at high pressure is installed. shall.

As shown in Figure 1, an air compressor (20) with an output of 10 to 20 horsepower (HP), an air production volume of 400 to 700 liters (L)/min, and an air pressure of 7 to 15 bar; A cylindrical silica sand container (17) with a diameter of 30 to 70 cm made of steel with a thickness of 2 mm or more capable of withstanding pressure and storing 50 to 70 liters of natural silica sand (40); A silica sand container opening/closing unit (16) that fills the silica sand container (17) with natural silica sand and closes the injection port to prevent the compressed air inside from leaking out. A silica sand outlet (15) with a diameter of 0.5 to 1.5 cm installed so that natural silica sand (40) can be discharged from the bottom of the silica sand container (17); A high-pressure silica sand outlet (14) that discharges natural silica sand discharged from the outlet (15) below the silica sand container (17) at high pressure to the high-pressure pipe (13a) and the high-pressure hose (13); a silica sand amount controller (14a) that controls the amount of silica sand discharged from the silica sand outlet (15); A compressed air inlet (19a) installed at an area 10 to 15 cm above the silica sand container (17) to compress the air inside the silica sand container (17); A high-pressure hose (18) that sends compressed air from the air compressor (20) to the silica sand container (17); A high-pressure pipe (19) that sends compressed air from the high-pressure hose (18) to the compressed air inlet (19a); A high-pressure pipe (13b) that sends compressed air from the high-pressure hose (18) to the high-pressure silica sand outlet (14); A high-pressure pipe (13a) that sends the high-pressure silica sand discharged from the high-pressure silica sand outlet (14) to the high-pressure hose (13); A high-pressure hose (13) that sends the high-pressure silica sand coming from the high-pressure pipe (13a) to the high-pressure silica sand spray nozzle (12); It is a natural silica sand high-pressure injection system consisting of a high-pressure silica sand injection nozzle (12).

As shown in Figure 2, the main material for implementing the present invention is environmentally friendly natural silica sand, and its particle size must be between 0.075mm (200mesh) and 0.42mm (40mesh).

The reason for using the natural silica sand as the main material in the present invention is that, as shown in Table 1 below, the present inventor conducted an experiment by spraying each eco-friendly abrasive at high pressure 10 times, and as a result, graffiti on stones such as marble and granite, stone moss and This is because it was confirmed that natural silica sand of the above particle size does not cause damage to the surface of stone or wood and is the most excellent abrasive in polishing and peeling ability in removing contamination from Hanok wood.

In addition, as natural silica sand is a natural material, not only is it not harmful to the environment or the human body, but the particle size is constant, so uniform polishing results can be expected, and it can be easily purchased and the purchase price is low, so it is very economical.

Table 1

Therefore, not only can the purpose of the present invention not be achieved by simply spraying an unspecified abrasive using an air compressor of unspecified performance, but it can also cause fatal problems such as damaging the surface of stone or wood.

According to the present invention, a natural silica sand high-pressure spraying system is provided to spray the natural silica sand at high pressure on graffitied stones, stone objects with moss, or contaminated wood, and the friction force removes graffiti, stone moss, and contaminated areas from the wood or stone. If only the material is selectively peeled off and removed, the above problems can be completely solved.

The air compressor 20 may be an air compressor powered by electricity or an engine, but since three-phase power is absent in most work sites, it is preferable to use an air compressor powered by its own engine.

The length of the high-pressure hose (18) connecting the air compressor (20) and the silica sand container (17) can be determined depending on the site situation, but care must be taken because if it is too long, a loss of air pressure may occur.

The length of the high-pressure hose (13) connected to the high-pressure pipe (13a) that discharges high-pressure silica sand can be determined depending on the site situation, but if it is too long, loss of high-pressure silica sand spraying power may occur, and there may be weight inside the high-pressure hose (13). Since the silica sand moves, care must be taken not to make it too long considering the convenience of work.

The silica sand spray nozzle (12) must be made of a material that is not easily worn out by friction with the silica sand that is repeatedly sprayed, and the amount of silica sand (11) sprayed must be adjusted according to the condition of the stone or wood to be removed, so that it is appropriately sprayed. A nozzle with the right diameter must be selected and used.

As described above, when the natural silica sand high-pressure injection system is provided, natural silica sand (40) is filled in the silica sand container (17) to the bottom of the air inlet (19a) of the silica sand container (17), and the opening and closing part (16) of the silica sand container is completely closed. The silica sand container must be closed so that the compressed air (18) inside it does not leak to the outside.

In this way, the reason for filling the inside of the silica sand container 17 with high-pressure compressed air 19b is to push the silica sand 40 inside the silica sand container to the silica sand discharge port 15, but the compressed air high-pressure piping from the air compressor 20 This is to prevent the silica sand discharged to the silica sand outlet (15) from flowing back into the outlet (15) due to the high-pressure air flowing in through (13b).

When filling the silica sand container 17 with natural silica sand, as shown in FIG. 2, when stones or stone objects are the subject of removal work, the particle size of the natural silica sand is 40 to 70 mesh (41) or 70 to 100 mesh (42). When the object of removal work is wood, natural silica sand with a particle size of 100 to 200 mesh (43) should be used to prevent surface damage and maintain the best removal rate.

In other words, in order to prevent scratches or damage to the surface, silica sand with rather coarse particles should be used in the case of stone or masonry, and silica sand with rather fine particles should be used in the case of wood.

In addition, when filling the natural silica sand into the silica sand container 17, in order to achieve uniform work results and smooth discharge of silica sand, natural silica sand that has been filtered in advance with a filter, etc. by removing foreign substances that interfere with discharge should be used.

As described above, when the silica sand container 17 is filled with natural silica sand and the natural silica sand high-pressure spraying system is completed, the air compressor 20 is operated to spray natural silica sand at high pressure on graffiti, moss, and contamination to be removed, according to the present invention. can be implemented.

Hereinafter, a method of removing graffiti, moss, and contamination by spraying natural silica sand at high pressure will be described.

As shown in Figure 3, when natural silica sand is sprayed at high pressure to remove graffiti, moss, and contamination on the surface of stones, stone objects, and wood, the distance between the silica sand spray nozzle 12 and the work object 32 is 30. ~50cm (31) is preferable, but if graffiti or contamination is severe or occurs in a deep area, removal work should be carried out by maintaining a closer distance.

In addition, if you focus on spraying only one part, scratches or damage may occur on the surface of the stone due to strong friction, so move the silica sand spray nozzle (12) up, down, left, and right (34) to spray evenly on all surfaces. (11) should be (33).

During the above removal work, the silica sand particles sprayed at high pressure strongly rub against the stone materials and may splash onto the worker's face, causing injury, so the work must be performed after wearing a face protector.

If the amount of silica sand sprayed during work is too large, the friction force decreases and the graffiti or contamination removal rate decreases. Therefore, the work must be performed while checking the silica sand spray amount and adjusting the silica sand spray controller (14a) to spray an appropriate amount of silica sand.

It is very economical to collect silica sand that has fallen on the floor of a work site, remove foreign substances, and then recycle it, as it can reduce work costs.

As described above, the present invention can be implemented by spraying natural silica sand at high pressure to remove graffiti, moss, and contamination.

Hereinafter, a comparison will be made between the conventional method and the present invention.

First, it is a case of removing graffiti or contamination from a flat surface.

As shown in Figure 4, when red lacquer spray graffiti is painted on a flat surface, conventionally, after applying a cleaning agent or chemical substance 51, it is removed by rubbing it with a cloth or brush. As a result, the lacquer spray graffiti is removed, but it is not dissolved in the cleaning agent or chemical substance. There is a problem that residual contaminants seep into the surface of stones and cause secondary contamination (52).

On the other hand, as shown in Figure 5, the results of removing the red lacquer spray graffiti painted on a flat surface by spraying natural silica sand according to the present invention show that not only the red lacquer spray graffiti is selectively peeled off and removed (61), By not using any liquid solvents, the flat surface was restored to its original appearance without secondary damage (62).

Second, it is a case of removing graffiti or contamination from uneven surfaces.

As shown in Figure 6, conventionally, in order to remove graffiti or contamination from a surface with irregularities, an abrasive tool 71 such as a grinder was used to physically and mechanically remove graffiti or contamination, but as a result, the graffiti or contamination was removed physically and mechanically. The original surface shape with convexities and convexities was polished, causing secondary damage as the object itself became thinner (72).

On the other hand, as shown in Figure 7, the results of removing red lacquer spray graffiti painted on a surface with irregularities by spraying natural silica sand according to the present invention show that the graffiti removal work according to the present invention is performed on the surface. Even if there are irregularities on the surface, by selectively peeling and removing only the red lacquer spray graffiti portion (81), even in the case of uneven surfaces, the irregularities are restored to their original appearance without leaving secondary damage to the surface. You can see the partially restored results (82).

In this way, when removing graffiti, stone moss, and contamination from stones, stone objects, and wood according to the present invention, unlike the prior art, even if the surface of the stone is flat or has irregularities, secondary damage is not caused to the surface. It is well known that the original appearance can be perfectly restored (82).

According to the above method, the inventor removed graffiti, moss, and contamination from actual stones, stone objects, and wood, as shown in FIGS. 8, 9, 10, 11, 12, 13, and 13. As shown in Figures 14 and 15, it can be seen that graffiti, moss, and contamination can be completely removed without leaving secondary damage to the surface even if it has irregularities or a complex structure.

According to the present invention, natural silica sand is sprayed at high pressure on graffitied stones, moss-covered stone objects, and contaminated wood to remove deep irregularities or complex areas that were previously impossible to remove without causing damage to the surface. By peeling and removing graffiti, stone moss, and contaminated areas with the friction force even in areas where abrasive tools cannot enter due to the structure, the original shape of stones, stone objects, and wood can be restored without using chemicals, machines, or tools. There is an advantage.

Therefore, according to the present invention, when removing graffiti, moss, and contamination from graffitied stone, moss-covered stone, and contaminated wood, environmental damage caused by the use of chemicals can be prevented, unlike before, This protects the safety and health of workers, and by not using polishing tools, it is possible to remove graffiti and contamination on the uneven parts of wood or stone without damaging or damaging the surface. This is a new method and is very practical.

In addition, natural silica sand is sprayed at high pressure and the friction force quickly removes large amounts of graffiti, moss, and contaminated areas. As in the past, many workers are mobilized to apply chemicals and wipe each object to remove graffiti, moss, and contamination. It is very effective from an environmental and economic perspective because it can quickly and completely remove large amounts of graffiti, moss, and contamination without spending a lot of time, such as polishing using tools such as a grinder.

Figure 1 is an explanatory diagram of a natural silica sand high-pressure spraying system for implementing the present invention.
Figure 2 is an explanatory diagram of the particle size of natural silica sand that is most effective in removing graffiti, moss, and contamination.
Figure 3 is an explanatory diagram of a method of removing graffiti by spraying natural silica sand.
Figure 4 is an explanatory diagram illustrating a conventional liquid chemical decontamination remover applied to remove graffiti or contamination from the surface (51), and the liquid contaminants are spread inside the surface as a result of removing the contamination (52).
Figure 5 is an explanatory diagram showing how natural silica sand was sprayed (61) to remove graffiti or contamination from the surface according to the present invention, thereby completely removing the graffiti or contamination (62).
Figure 6 is a description of the conventional uneven surface, which was mechanically polished using a grinder or other method to remove graffiti or contamination (71), and as a result of removing the contamination, the uneven surface disappeared and lost its original appearance (72). It is a degree.
Figure 7 shows the spraying of natural silica sand (81) to completely remove graffiti or contamination from the uneven portion according to the present invention, and then restore the uneven surface. This is an explanatory diagram of one appearance (82).
Figure 8 shows how graffiti and contamination on the surface of natural stone were completely removed by spraying natural silica sand according to the present invention.
Figure 9 shows a restoration of a granite tombstone by completely removing moss and old dirt from the surface by spraying natural silica sand according to the present invention.
Figure 10 shows a restoration of a piece of granite by spraying natural silica sand according to the present invention, completely removing stone moss and old dirt from the uneven surface.
Figure 11 shows a restoration of a piece of granite by spraying natural silica sand according to the present invention, completely removing stone moss and old dirt from the uneven surface.
Figure 12 shows a restoration of a granite stone pagoda by spraying natural silica sand according to the present invention, completely removing stone moss and old dirt from the uneven surface.
Figure 13 shows the original pattern restored after completely removing natural silica sand by spraying (91) natural silica sand to remove contamination from the wooden pillars of a Hanok according to the present invention.
Figure 14 shows the restoration after completely removing the contamination of the Hanok windows by spraying natural silica sand (92) to remove contamination from the Hanok windows according to the present invention.
Figure 15 is a view showing the restoration after completely removing contamination of rafters and raised floors that could not be removed in the past by spraying natural silica sand to remove contamination of Hanok wood according to the present invention.

The present invention relates to a method of removing graffiti and contamination using natural silica sand. As described above, the present invention relates to a method of removing graffiti and contamination from graffitied stones, moss-covered stone objects, and contaminated wood. By spraying silica sand at high pressure and selectively peeling and removing graffiti, moss, and contaminated parts from stones, stone objects, and wood using the frictional force without causing damage to the surface, the original condition is restored. That purpose can be achieved.

In order to implement the present invention, a certain type of natural silica sand high-pressure spraying system (FIG. 1) that can spray natural silica sand at high pressure must be provided.

The natural silica sand high-pressure injection system (FIG. 1) has been described in detail in the solution to the above problem, so this will be omitted.

The natural silica sand high-pressure spraying system (FIG. 1) sprays natural silica sand (FIG. 2), as defined in the present invention, at high pressure to spray stones, stone objects, and wood through friction without causing damage to the surface. It is suitably designed to selectively remove only graffiti, moss, and contaminated parts from wood. The natural silica sand (40) stored in the silica sand container (17) is sent to the silica sand spray nozzle (12) at high pressure, and the spray nozzle ( The purpose can be achieved by moving 12) up, down, left, and right while spraying it on the surface of graffiti, moss, and decontamination objects.

Hereinafter, preferred embodiments of the present invention will be described in detail.

As described above, when a high-pressure natural silica sand injection system (FIG. 1) is provided, natural silica sand 40 of the selected particle size is filled up to the air inlet 19a of the silica sand container 17, and then compressed air 19b inside the silica sand container 17 is supplied. Close and seal the opening/closing part of the silica sand tank (16) to prevent leakage to the outside.

The reason is that the natural silica sand inside the silica sand container is pushed down to the outlet (15) and the high-pressure compressed air coming from the air compressor (20) through the high-pressure hose (18) and the high-pressure pipe (13b) pushes it down to the outlet (15). This is to prevent the backflow of natural silica sand (40).

After locking and sealing the silica sand container opening and closing part (16), the air compressor (20) is operated to proceed with full-scale graffiti, moss, and contamination removal work.

When the air compressor 20 is operated, high-pressure compressed air is divided into two high-pressure pipes 19 and 13b and moves.

One enters the air inlet (19a) of the silica sand tank through the high-pressure pipe (19), and the other moves to the high-pressure silica sand outlet (14) through the high-pressure pipe (13b).

Thereafter, when the silica sand amount controller 14a is opened, the compressed air 19b inside the silica sand container is discharged from the silica sand container 17 through the outlet 15, and the discharged natural silica sand is compressed by high pressure from the high pressure pipe 13b. Due to the high pressure caused by the air, the sand begins to be sprayed into the silica sand spray nozzle 12 through the high pressure pipe 13a and the high pressure hose 13.

Below, we will explain a method of removing graffiti, moss, and contamination from stones, stone objects, and wood using natural silica sand sprayed at high pressure.

As shown in Figure 3, when spraying natural silica sand at high pressure to remove graffiti, moss, and contamination from the surface of stones, stone objects, and wood, the silica sand spray nozzle 12 and the work object 32 The preferred distance is 30 to 50 cm (31), but if graffiti or contamination is severe or occurs in a deep area, removal work should be carried out by keeping the distance closer.

In addition, if the spray is concentrated on one part, scratches or damage may occur on the surface of the stone due to strong friction, so move the silica sand spray nozzle (12) up, down, left, and right while spraying (34) to spread friction evenly on all surfaces of the object. This must be done as much as possible (33).

In the above process, the degree of removal of graffiti, moss, and contamination and the damage to the surface of the object must be checked while controlling the amount of silica sand sprayed through the silica sand amount controller 14a.

During the above removal work, the silica sand particles sprayed at high pressure strongly rub against the object and may splash onto the worker's face, causing injury, so the work must be performed after wearing a face protector.

It is very economical to collect silica sand that has fallen on the floor of a work site, remove foreign substances, and then recycle it, as it can reduce work costs.

As described above, the present invention can be implemented by spraying natural silica sand at high pressure using a natural silica sand high pressure spraying system (FIG. 1) to remove graffiti, moss, contamination, etc.

Hereinafter, the present inventor will explain in detail through an example in which graffiti, moss, contamination, etc. were actually removed in the field.

Example 1 is an example of removing moss and contaminants from stone materials such as marble and granite through lacquer spray graffiti or tombstones.

Figure 8 shows the results of removing lacquer spray graffiti painted on natural stone within 10 seconds by spraying natural silica sand at high pressure according to the present invention.

Looking at this, unlike in the past, you can see the result of the stone being completely restored to its original appearance very quickly without any secondary spreading or damage to the surface caused by residual contaminants on the surface of the stone.

Figure 9 shows the results of spraying natural silica sand at high pressure according to the present invention to remove a tombstone contaminated with stone moss, old dirt, etc. over a long period of time.

This is a result that is impossible with conventional chemical and mechanical methods, and the result is that the surface of the tombstone is perfectly restored to its original appearance without secondary damage.

Figure 10 shows the results of removing a complex pattern on a granite tortoise-shaped pedestal that had been contaminated with stone moss, old dirt, etc., which had developed over a long period of time, by spraying natural silica sand under high pressure according to the present invention.

Looking at this, you can see that even the uneven parts, which were impossible with conventional chemical and mechanical methods, were completely restored to their original appearance without secondary damage.

Figure 11 shows the results of removing a piece of granite with a complex pattern contaminated with stone moss, old dirt, etc. that had developed over a long period of time by spraying natural silica sand under high pressure according to the present invention.

Looking at this, you can see that even the uneven parts, which were impossible with conventional chemical and mechanical methods, were completely restored to their original appearance without secondary damage.

Figure 12 shows the results of spraying natural silica sand at high pressure to remove a granite stone pagoda contaminated with stone moss, old dirt, etc. that had accumulated over a long period of time, according to the present invention.

Looking at this, you can see that even the uneven parts, which were impossible with conventional chemical and mechanical methods, were completely restored to their original appearance without secondary damage.

As described above, looking at the results of removing graffiti, moss, old dirt, contamination, etc. from stones or stone objects by spraying natural silica sand at high pressure according to the natural silica sand high pressure spraying system of the present invention, the surface of the object was different from the prior art. It can be seen that the original shape is perfectly restored, not only on the flat surface but also on the deep uneven parts, without causing any secondary damage.

Example 2 is an example of removing contamination from wood such as a Hanok by spraying natural silica sand at high pressure according to the natural silica sand high pressure spraying system of the present invention.

Figure 13 shows the process (91) and the results of removing serious contamination that occurred on the wooden pillars of a Hanok over a long period of time by spraying natural silica sand at high pressure according to the present invention.

The present inventor maintains a distance of 30 to 50 cm between the natural silica sand spray nozzle (12) and the contaminated wood, and moves the spray nozzle (12) up, down, left, and right to spray natural silica sand on the contaminated wood portion, thereby spraying natural silica sand on the surface of the wood. The contamination was completely removed without any secondary damage, and the results shown in FIG. 13 were obtained.

Unlike in the past, this allows restoration of the original condition of wooden pillars by completely removing contamination without using any wet cleaners or chemicals, and using abrasive tools such as grinders that cause secondary damage to the wooden surface. You can see the results of restoring the original pattern of the wood without using it.

Figure 14 shows the process 92 and the results of removing serious contamination that occurred on the wooden doors and bars of a Hanok over a long period of time by spraying natural silica sand at high pressure according to the present invention.

The present inventor maintains a distance of 30 to 50 cm between the natural silica sand spray nozzle (12) and the contaminated Hanok doors and bars, and moves the spray nozzle (12) up, down, left, and right to spray natural silica sand on the contaminated areas, thereby damaging the Hanok doors and bars. Contamination was completely removed without any secondary damage to the grate, and the results shown in Figure 14 were obtained.

In particular, in the case of wooden doors and bars of Hanok, one thing to keep in mind when spraying silica sand at high pressure is that since thin window paper is attached to the bars, it is better to spray in a diagonal direction of about 45 degrees rather than spraying at a right angle to the bars. It is desirable because it can protect the window paper.

In this way, when the contamination of the doors and bars of a hanok is severe, conventionally there is no way to remove the contamination, so there is no choice but to replace them. However, according to the present invention, contamination of the doors and bars of a hanok can be easily removed, eliminating the expensive cost. There was no need to replace it.

Figure 15 shows the results of removing contamination that occurred on all wood of a Hanok over a long period of time by spraying natural silica sand at high pressure according to the present invention.

The present inventor maintains a distance of 30 to 50 cm between the natural silica sand spray nozzle (12) and the contaminated wood, and moves the spray nozzle (12) up, down, left, and right to spray natural silica sand on the contaminated wood portion, thereby spraying natural silica sand on the surface of the wood. The contamination was completely removed without any secondary damage, and the results shown in FIG. 15 were obtained.

Unlike before, this allows the original wood to be restored by completely removing contamination without using any wet cleaners or chemicals, and without using abrasive tools such as grinders that cause secondary damage to the wood surface. You can see the results of restoring the original form of the wood.

Looking at this, according to the present invention, even the deep-cored rafter part 93, which could not be contaminated by conventional methods due to the structural characteristics of a hanok, or the raised floor part 94, which is carved with intaglio and embossing and has a complex structure, is easily contaminated according to the present invention. It can be seen that the original appearance of the Hanok can be restored by removing the .

The present invention relates to a technology for removing graffiti, moss, and contamination from stones, stone objects, and wood using natural silica sand, using a natural silica sand high-pressure spraying system without damaging the surface without using chemicals or tools. It has the advantage of being able to easily remove natural silica sand by spraying it at high pressure to restore the original state of stones, stone objects, and wood. Therefore, unlike in the past, environmental damage can be prevented, the safety and health of the operator can be protected, and the surface of the wood or stone is not damaged or damaged as abrasive tools are not used. It is very practical as it can even remove graffiti and contamination from concave and convex areas. In addition, natural silica sand is sprayed at high pressure to quickly remove a large amount of graffiti, moss, and contaminants using its friction force. As in the past, many workers are mobilized to individually apply chemicals to and wipe off graffiti, moss, and contaminants. It is very effective from an environmental and economic perspective because it can quickly and completely remove large amounts of graffiti, moss, and contamination without spending a lot of time, such as polishing using tools such as a grinder. Natural silica sand, which is used as the main material, is very economical because its purchase price is very cheap and it can be recycled.

Lacquer spray graffiti applied to stone walls made of marble, granite, etc. of cultural property facilities not only lowers the value of the cultural property, but also deteriorates its aesthetics, and there is a strong need to quickly and completely remove it, and there is a strong need to remove it quickly and completely. There is a need to remove old stains and stone moss that form on stone objects and disturb their aesthetics and lose their original appearance, thereby restoring them to their original state. Recently, as the preference for Hanok has increased, mold and foreign substances that occur in wood, the main material of Hanok, have been removed. There is a strong need for removal of contamination by graffiti, moss, and contamination, and although a method to quickly and effectively remove graffiti, moss, and contamination is desperately needed, it has been left as is due to the absence of an effective technology or method to solve this problem. However, the present invention Accordingly, the above problems can be smoothly solved, and the industrial applicability is very high.

11: Spraying natural silica sand at high pressure
12: Natural silica sand spray nozzle
13: High pressure hose through which natural silica sand is discharged
13a: High-pressure pipe through which high-pressure silica sand is discharged
13b: High pressure pipe
14: High-pressure silica sand outlet
14a: Silica sand amount controller
15: Silica sand outlet
16: Silica tank opening and closing part
17: Silica sand container
18: Compressed air discharge hose
19: High pressure pipe
19a: Compressed air inlet
19b: Compressed air inside the silica sand container
20: Air compressor
31: Distance between spray nozzle and graffiti and contaminated areas
32: Graffiti and contaminated areas on stone
33: Illustration of spraying silica sand up, down, left and right
34: Illustration of moving the spray nozzle up, down, left and right
41: Natural silica sand (40~70mesh)
42: Natural silica sand (70~100mesh)
43: Natural silica sand (100~200mesh)
51: Chemicals applied to the graffiti on a flat stone
52: Chemicals seeping into the surface of a flat stone
61: Spraying natural silica sand on the graffiti area of a flat stone
62: Graffiti on a flat stone has been removed
71: Removing graffiti from uneven stone with a grinder
72: The irregularities of the stone have disappeared and the surface has been shaved.
81: Spraying natural silica sand on the graffiti area of stone with irregularities.
82: Graffiti on uneven stone has been completely removed
91: Spraying natural silica sand on contaminated parts of Hanok wood
92: Spraying natural silica sand on contaminated areas of Hanok doors and bars
93: Contamination of Hanok rafters completely removed
94: The contamination of the hanok numaru has been completely removed.

Claims (3)

An air compressor (20) with an output of 10 to 20 horsepower (HP), an air production volume of 400 to 700 liters (L)/min, and an air pressure of 7 to 15 bar; A cylindrical silica sand container (17) with a diameter of 30 to 70 cm made of steel with a thickness of 2 mm or more capable of withstanding pressure and storing 50 to 70 liters of natural silica sand (40); A silica sand container opening/closing unit (16) that fills the silica sand container (17) with natural silica sand and closes the injection port to prevent the compressed air inside from leaking out. A silica sand outlet (15) with a diameter of 0.5 to 1.5 cm installed so that natural silica sand (40) can be discharged from the bottom of the silica sand container (17); A high-pressure silica sand outlet (14) that discharges natural silica sand discharged from the outlet (15) below the silica sand container (17) to the high-pressure pipe (13a) and the high-pressure hose (13) at high pressure; a silica sand amount controller (14a) that controls the amount of silica sand discharged from the silica sand outlet (15); A compressed air inlet (19a) installed at an area 10 to 15 cm above the silica sand container (17) to compress the air inside the silica sand container (17); A high-pressure hose (18) that sends compressed air from the air compressor (20) to the silica sand container (17); A high-pressure pipe (19) that sends compressed air from the high-pressure hose (18) to the compressed air inlet (19a); A high-pressure pipe (13b) that sends compressed air from the high-pressure hose (18) to the high-pressure silica sand outlet (14); A high-pressure pipe (13a) that sends the high-pressure silica sand discharged from the high-pressure silica sand outlet (14) to the high-pressure hose (13); A high-pressure hose (13) that sends the high-pressure silica sand coming from the high-pressure pipe (13a) to the high-pressure silica sand spray nozzle (12); A natural silica sand high-pressure injection system (FIG. 1), characterized by consisting of a high-pressure silica sand injection nozzle (12).
Using a natural silica sand high-pressure spraying system (Figure 1), natural silica sand (Figure 2) with a particle size of 0.075mm (200mesh) to 0.42mm (40mesh) is sprayed at high pressure to spray stones such as granite and marble walls or tombstones. , Method of removing graffiti, stone moss, contamination, etc. from stone objects such as stone pagodas, Hanok wood, etc. (see Figures 8, 9, and 13).
Using a natural silica sand high-pressure spraying system (Figure 1), natural silica sand (Figure 2) with a particle size between 0.075mm (200mesh) and 0.42mm (40mesh) is sprayed at high pressure to spray stones or tombstones such as granite and marble walls. , graffiti, stone moss, contamination, etc. on stone objects such as stone pagodas, uneven parts of Hanok wood, etc., Hanok doors and bars, parts with complex structures that cannot be accessed by polishing tools, etc. Method for removing (see FIGS. 10, 11, 12, 14, and 15).

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