KR101007194B1 - Tunnel detergent and tunnel Detergent Cleaning methods - Google Patents

Abstract

The present invention consists of a cleaning agent and a neutralizing agent, the cleaning agent is composed of 75.0 kg of water, 5.5 kg of nonionic surfactant, 15.5kg of hydrofluoric acid, 0.5kg of thickener, 4.0kg of glycol, neutralizing agent of 80.0kg of water, nonionic surfactant 1.30 The present invention relates to a tunnel cleaner comprising kg, 0.5 kg of sodium carbonate, 0.5 kg of thickener, 5.0 kg of glycol, and 0.2 kg of antifoam, and a tunnel washing method using the same.

Tunnel cleaner. Tunnel cleaning method. cleaning solution. corrector.

Description

 Tunnel detergent and tunnel Detergent Cleaning methods

The present invention relates to a tunnel cleaner comprising a washing agent and a neutralizing agent and composed of water, a nonionic surfactant, hydrofluoric acid, a thickener, glycol, and the like, and a tunnel washing method using the same.

In general, contaminants such as dust, soot, organics, and inorganics in the air are attached to the wall of the tunnel, and these contaminants cause the electrochemical reaction with salts and rainwater in the air, or by acid rain due to air pollution. The wall surface of the corroded corroded, and the corroded wall is formed with a fine corroded groove, the contaminants are deeply stuck in the corrugated groove, thereby damaging the appearance of the tunnel, as well as the corrosion of the There is also a risk of major accidents as it progresses, so regular cleaning should be performed.

To this end, conventionally, a method of washing by adding a neutral detergent to water or water was used, but in this case, the contaminants on the surface can be removed to some extent, but the contaminants that are already strongly attached are not removed. To clean the surface using a coarse brush to clean the surface, scratches remain on the surface, and a short time after cleaning, there is a lot of research to solve the problem that contaminants are newly attached to the generated scratches to promote corrosion. come.

For example, 10 to 20% by weight of an alkali agent mixed with sodium oligosilicate, sodium carbonate and sodium bicarbonate, and 0.1 to 2% by weight of polyoxyethylene nonylphenyl ether as a low foaming surfactant 0.1 to 2% by weight of sodium metasilicate as a penetrant, 0.1 to 2% by weight of sodium tripolyphosphate as a buffering aid, 0.1 to 2% by weight of hexamethaphosphate as a structural stabilizer and 72 to 89.6% by weight of ion-exchanged water. Soundproof walls and tunnel cleaners, characterized by mixing and dissolving are disclosed,

Publication No. 10-0558677 discloses a cleaning structure selection process (S10) for determining and selecting whether or not to clean by observing the surface state of the structure with the naked eye; A pretreatment step (S20) of removing rust, bonds and whitening by spraying a foreign substance cleaner on the surface of the selected structure through the cleaning structure selection step (S10); Washing water dilution process (S30) of mixing the washing stock solution with soft water according to the degree of contamination of the surface of the structure from which the rust, bond and whitening is removed, dilution to obtain the wash water; A washing water spraying process (S40) for spraying the washing water by applying zigzag from the lower portion of the structure surface to the upper portion using a low pressure spray; A neutralizing solution spraying step (S50) of washing the washing water and foreign substances by spraying the neutralizing solution with a high pressure spray on the surface of the structure to which the washing water is applied after the predetermined reaction time is zigzag from the lower part to the upper part; The technology configuration for cleaning the lower part from the upper by using the fresh water and the washing water and the neutralizing liquid remaining on the surface of the structure washed with the neutralizing liquid is disclosed,

The number of ethylene oxide addition moles is 7-10, cloudy in the polyoxyethylene alkylaryl ether nonionic surfactant or the polyoxyethylene alkyl ether nonionic surfactant of the polyethylene oxide condensed surfactant according to Korean Patent Publication No. 10-0570916. The nonionic surfactant whose point is 20-80 degreeC and the HLB value in the range of 12.0-13.3 consists of a main component (40-80%), and it is 2-10% of ethanolamine-type neutralizing agents, and 3 to 8 ethylene glycol-type compatibilizers as a subcomponent. %, High fatty acid amide condensate foam stabilizer 2-10%, methylcellulose thickener 1-5%, silicone antifoaming agent 1-5% of the stone and building culture material cleaning method for cleaning organic pollutants is described,

In Korean Patent Publication No. 10-2007-0104181, nonionic surfactants are used to remove organic pollutants from stone and building cultural properties, and hydrogen peroxide (H2O2) as a chemical for washing white matter and microbial contaminants. And hydrofluoric acid (HF) or hydrochloric acid (HCL), and ethanolamine-based neutralizer, ethylene glycol-based compatibilizer, higher fatty acid amide condensate-based foam stabilizer, methylcellulose-based thickener, or silicone-based antifoaming agent. Using steel, aluminum, titanium, zinc, and copper corrosion inhibitors, there is no risk of secondary contamination when cleaning stone and building cultural properties, and excellent cleaning power for organic pollutants. It is characterized in that it is not corrosive to copper, titanium, and zinc ornaments. Is a method for producing stone and metal non-corrosive acid cleaner for cleaning buildings cultural properties are open,

Japanese Laid-Open Patent Publication No. 1997-253018 has an absorption process for drinking water on a wall surface, and after this absorption process, a weak acid detergent is applied to the wall surface and left for a certain time, after which the detergent can be wiped off and wrinkles can be removed. Based on this confirmation process, a detergent impregnation process in which a weak acid detergent of a predetermined concentration is applied to the wall surface and left for a predetermined time and impregnated with the detergent in the wall surface, and ultrasonic waves are irradiated on the wall surface. Neutralization by applying and impregnating a weak alkaline neutralizing agent on the wall surface by combining the ultrasonic irradiation process that caused the cavitation and volatilized the wrinkles simultaneously with the detergent and the pH value of the detergent of the weak acid of the predetermined concentration used in the detergent impregnation process. Equipped with a process for spraying and impregnating high pressure water into the process and wall, vacuum draining and washing the wall And wrinkles subtracting method of building a wall featuring known,

    Publication No. 1998-306300 discloses 1 to 50% by weight of organic acid, 1 to 50% by weight of 1-hydrodocieciriden-1,1-zihoshon acid, and 0.1 to 10% by weight of surfactant. It turns out that the detergent for building exterior walls which consists of the aqueous washing solution containing and alkaline aqueous solution which neutralizes the washing aqueous solution is disclosed.

Conventional strong acid or strong alkaline cleaners are so corrosive that if the cleaning operation is performed using them, the surface of the soundproof walls or tunnels will be severely damaged, harmful to the human body of the worker, and will greatly contaminate the environment. The invention is to be solved.

The present invention has been made to solve the problems of the prior art, by removing the contaminants attached to the tunnel to prevent the appearance of damage to the tunnel as well as significantly improve the durability and weather resistance, the development of large accidents due to the progress of corrosion It is a problem solving means to achieve the present invention to provide a tunnel cleaning agent and a tunnel cleaning method using the same to prevent the risk, and to minimize environmental pollution without compromising the health of the worker.

The present invention can clean various old contaminants adhering to the tiles in the tunnel within a short time, thereby preventing aesthetic damage of the tunnel, significantly improving durability and weather resistance, and also not harmful to the human body of the worker, It is effective to minimize.

In order to achieve the above object, the present invention comprises a cleaning agent and a neutralizing agent,

The cleaning agent consists of 75.0 kg of water, 5.5 kg of surfactant, 15.5 kg of hydrofluoric acid, 0.5 kg of thickener, and 4.0 kg of glycol.The neutralizer consists of 80.0 kg of water, 1.30 kg of nonionic surfactant, 0.5 kg of sodium carbonate, 0.5 kg of thickener, and glycol 5.0. The present invention relates to a tunnel cleaner comprising kg and an antifoam agent of 0.2 kg and a tunnel washing method using the same.

The cleaning agent of the present invention is composed as follows.

Active ingredient (AI) content (kg)

       Water 75.0 (± 2.0)

Surfactant 5.5 (± 1.0)

Foshan 15.5 (± 2.0)

       Thickener 0.5 (± 0.1)

Glycol 4.0 (± 0.5)

100.5 kg

Tap water or purified water (such as distilled or deionized water) should be given priority, and the water used to prepare the diluent should be determined by the working conditions. In particular, the use of contaminated groundwater may result in rather unsuitable criteria for post-cleaning effluent standards set by the Ministry of Environment.

Surfactants are used with the highest priority for nonionics and sometimes mixed with anionics. In the case of nonionic surfactants, it is recommended to exclude nonylphenyl (NP), which has recently been banned, and to use lauryl alcohol.

However, most of these nonionic surfactants are foamy and biodegradation rate is low, so plan to reduce the amount of use sequentially or use alternatives with less bubbles.

Anionic surfactants are used by mixing linear alkylbenzenesulfonic acid or its sodium salt as occasional 10-30% of the nonionic surfactant, in this case it is effective to increase the cleaning power and control the viscosity of the solution. In particular, since the amount of surfactant directly affects BOD and COD, which is a problem in recent years, lowering the level of use is good in all respects.

Accordingly, the surfactant of the present invention is preferably polyoxyethylene polyoxypropylene alkyl ether type nonionic surfactant or any one compound selected from linear alkylbenzene sulfonic acid or its sodium salt as anionic surfactant.

Folic acid is one of the most important raw materials for the effectiveness of tunnel cleaners. The hydrofluoric acid used is a product having an effective content of about 50%, and the method of dividing it into the second half of the manufacturing process is minimized to minimize the exposure of steam, so that the safety of workers is considered as the top priority.

Recently, various types of hydrofluoric acid (ammonium fluoride, etc.) are used as a substitute for hydrofluoric acid, and low-vulcanization products may be introduced as new technologies. However, the hydrofluoric acid itself has the same toxicity, lowers brittleness, and reduces volatility. It may rather increase the long term exposure to residues to the user.

The content of hydrofluoric acid in the cleaner is low (minimum adaptation) and maintains toxicity, so the brittleness of the human sense can be more noticeable to the safety of the worker and has the advantage of rapid decomposition or neutralization of residues.

The concentration of hydrofluoric acid was determined at the minimum point at which the cleaning power (or cleaning efficiency) of the cleaning agent was considered in consideration of the safety of the worker and the efficient cleaning operation (optimum minimum concentration).

Thus, the pH of the cleaning agent, which is acidic in solution, was sensitively adjusted to increase as it applied to the cleaning surface and acted.

Designed to wash with minimal amount of neutralizer. Indeed, unused products in the process of supplying and storing detergents may have a reduced cleaning capacity in the long run, as the effective content of the detergents is close to the critical concentration. Therefore, the supplier should take care of the cleaning agent in all circumstances.

The use of thickeners prevents secondary contamination by preventing the solution from scattering when tunneling agents are used, and ensures sufficient pot life by slowing the evaporation time of moisture and ensures that the cleaning agent is attached to the working surface vertically. The purpose is to make it work. In addition, the tunnel cleaner is a slightly brittle acidic agent, so that the toxic substance is not easily volatilized, the thickening of the solution is very important.

As a thickener for the cleaning agent, any one selected from natural-friendly raw materials such as sodium chloride (natural salt), soluble starch, fructose and xanthan gum rather than synthetic chemicals is used to minimize contamination of the effluent generated after washing and increase biodegradability. I tried.

Glycol is a co-solvent used next to water in detergents, which not only enhances the miscibility of the formulation, but also effectively imparts wettability to the working surface by enhancing the cleaning power and lowering the surface tension of the liquid separately from the surfactant. At this time, the glycol of the part used has hydrophilicity and is easily mixed with water, which is the main solvent, and lowers the freezing point of the mixture composed of only water, thereby improving the storage performance and washing performance of the product.

In particular, glycol has a higher boiling point than water and does not evaporate easily, so it is also used for adjusting pot life. The glycol applicable to this formulation can be used individually or in mixture of these components, such as ethylene glycol, propylene glycol, butoxyethanol, butoxyethoxyethanol.

In addition, these glycols, which are easily soluble in water, play an important role in minimizing the commercialization of surfactants because they are less sensitive to BOD and COD, which are important factors in the standard of effluent water as waste.

The preferred cleaning procedure is completed in the case of tunnel cleaning by controlling the process following the pickling agent.

In any case, the process must be neutralized.

In the case of the tunnel cleaner, the acidity was minimized initially, so the neutralization process can be completed using a minimum amount of alkaline agent. In most cases, an aqueous solution of sodium hydroxide (caustic soda) or dilute ammonia is recommended for neutralizing the pickling agent.

Aqueous sodium hydroxide solution has the disadvantage of being corrosive to metals and other structures and the use of quite a lot of water for the removal of white stains and neutral residues. Dilute ammonia water has less side reactions and easier rinsing than caustic soda, but the unique smell of ammonia has a great effect on difficult working environment.

A preferred alternative as a neutralizer used in acidic cleaners is to use an aqueous sodium carbonate solution. Sodium carbonate is called soda ash for anhydrides, and hydrates are also called launders and crystalline soda. Sodium carbonate has been used in many fields because it has a high hygroscopic property, easily soluble in water and relatively low toxicity.

In particular, the sodium carbonate solution as a neutralizing agent in the tunnel washing process is not only odorless and low toxicity to ensure the safety of the operator, but also carbon dioxide bubbles generated in the neutralization reaction with excess hydrofluoric acid plays a role of enhancing the cleaning power, simply It is different from the existing one that only plays a role.

In addition, sodium fluoride, which is produced as a neutralization product of hydrofluoric acid and sodium carbonate, is known as a relatively safe substance as a major component added to fluoride solution, tap water, and toothpaste.

It can be seen that the neutralizing agent corresponding to the cleaning agent is composed as follows.

Dilution with water or rinsing water for neutralization is supplied to the consumer or used directly.

Active ingredient (AI) content (kg)

Water 80.0 (± 2.0)

Surfactant 1.30 (± 0.5)

Sodium Carbonate 0.5 (± 2.0)

Thickener 0.5 (± 0.1)

Glycol or Glycerol 5.0 (± 0.5)

Defoamer 0.2 (± 0.1)

87.5 kg

Water, surfactants and thickeners used in the neutralizing agent used the same or similar formulations to enhance usability with the acidic tunnel cleaner used in the first process. Glycol or glycerol was used for the purpose of increasing the wettability of the neutralizing agent, and in particular, by using the moisture retention of the glycerol to mitigate the rapid drying rate of water on the washing surface to prevent the unreacted neutralizing agent powder stain. In addition, since the ratio of water is relatively high in the case of the neutralizing agent is expected to freeze in winter, a neutralizing agent was prepared by adding glycol to prevent this.

Antifoaming agent of the present invention serves to suppress or remove bubbles generated due to the residual components of the detergent in the process of rinsing the cleaning agent, any one selected from the aqueous dispersion of silicone compound, polycarboxylic acid sodium salt, polycarboxylic acid sodium salt One compound or two or more compounds are used.

It is the most important part of the whole process of the tunnel washing process, and the active and radical steps of execution are neutralization and rinsing. The tunnel washing system is characterized by simultaneous neutralization and rinsing, and the neutralization and rinsing process is radically carried out by spraying neutralizer with a high pressure cleaner.

At this time, since the surfactant has been quantitatively used in the cleaning agent applied in the previous step, as much foam as the input amount is generated in the neutralization / rinsing process under high pressure. Antifoam was added to the neutralization / rinsing solution to suppress this and increase the efficiency of the work. Of course, the concentration was minimized as the neutralizer was used at the end of the rinse.

Insignificant alkalinity of the neutralizing agent has the advantage of inhibiting acidification of unintended structures by neutralizing or immobilizing residual components of the acidic cleaner continuously and stably.

As mentioned above, the alkaline neutralizers used in combination with most existing acidic cleaners are often very simply mixtures with water. However, with the exception of equal washing power, neutralization, rinsing and treatment of effluents are recognized as an important process over time.

In order to solve this problem, development of a new technology or process is required.

In the tunnel cleaning process (without distinction between strengths and weaknesses), the construction itself must be prohibited unless it is effective without the use of toxic substances.

However, if it is inevitable to use the cleaning agent, the use and treatment of the various formulations, if done properly, does not occur that will not be inefficient or environmentally friendly.

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

Example

First step (cleaning agent manufacture)

75.0 kg of water, 5.5 kg of alkylbenzenesulfonic acid (nonionic surfactant), 15.5 kg of hydrofluoric acid, 0.5 kg of xanthan gum (thickener), and 4.0 kg of glycol were mixed in a stirrer and stirred until the mixed solution became transparent to prepare a cleaning agent. After

2nd process (neutralization agent manufacture)

Water 80.0, alkylbenzenesulfonic acid (surfactant) 1.30 kg, sodium carbonate 0.5 kg, fructose (thickener) 0.5 kg, glycol 5.0 kg, polycarbonate sodium salt (foaming agent) 0.2 kg in a stirrer, the mixed solution is transparent After stirring to prepare the neutralizing agent,

3rd process (tunnel cleaning)

After washing the inside of the tunnel using a high-pressure sprayer at a pressure of 5 kg / ㎠ at 20 ~ 25 ℃ by diluting 100 kg of the detergent prepared in the first step in 20 ℃ water 300kg,

After 5 to 10 minutes, dilute 3000 kg of water at 20 ° C. to 100 kg of the neutralizing agent prepared in the second step, and secondly wash the inside of the tunnel using a high pressure sprayer at a pressure of 5 kg / cm 2 at 20 to 25 ° C. The inside of the tunnel was cleaned by neutralizing.

Tunnel cleaner of the present invention prepared as described above is composed of a cleaning agent and a neutralizing agent,

The cleaning agent is composed of 75.0 kg of water, 5.5 kg of nonionic surfactant, 15.5 kg of hydrofluoric acid, 0.5 kg of thickener, 4.0 kg of glycol.The neutralizer is 80.0 kg of water, 1.30 kg of nonionic surfactant, 0.5 kg of sodium carbonate, 0.5 kg of thickener, It can be seen that the composition is 5.0 kg of glycol and 0.2 kg of antifoaming agent.

Experimental Example 1

After washing the inside of the tunnel with high pressure spray at a pressure of 5 kg / ㎠ at 20 ~ 25 ℃ by diluting 20 ℃ in water in the tunnel cleaner prepared in the above embodiment,

After 5 to 10 minutes, the neutralizing agent was diluted with water at 20 ° C. and sprayed with high pressure at a pressure of 5 kg / cm 2 at 20 to 25 ° C. to neutralize the cleaning agent while simultaneously washing the inside of the tunnel.

As a result of confirming the washing effect with the naked eye, it was easily recognized that the pollutant melted and flowed out where it was washed using the tunnel tile decontamination composition of the present invention, and clearly showed an excellent washing effect compared to the case of washing with a general cleaning agent. It was found that the contaminants on the tunnel walls were completely removed.

Experimental Example 2

After washing the inside of the tunnel with high pressure spray at a pressure of 5 kg / ㎠ at 20 ~ 25 ℃ by diluting 20 ℃ in water in the tunnel cleaner prepared in the above embodiment,

After 5 to 10 minutes, the neutralizing agent was diluted with water at 20 ° C. and sprayed with high pressure at a pressure of 5 kg / cm 2 at 20 to 25 ° C. to wash the inside of the tunnel at the same time, while neutralizing the cleaning agent, and then cleaning the detergent as described above. And neutralizing agent was tested for diffusion reflectance as shown in Table 1.

Table 1

division
Branch A Branch B Remarks
Before washing After cleaning Before washing After cleaning One 42.85 73.25 40.36 75.6 2 41.54 75.69 41.15 74.25 3 43.26 74.25 41.69 77.25 4 41.87 71.69 47.25 71.02 5 42.65 75.25 47.62 76.08 6 44.22 74.21 45.23 74.56 7 43.21 78.59 45.2 75.24 8 40.55 74.15 42.9 71.36 9 55.23 72.26 47.8 77.85 10 47.02 70.26 47.8 77.85 Average 44.24 73.97 44.1 74.56

Test organization: Korea Testing Institute (411, Down-dong, Jung-gu, Ulsan)

Report Number: TAU-012799

Sample name; Tunnel Tile Wash

Date of Reception: November 14, 2008

Date of Completion; December 12, 2008

Location: Cheonggye Tunnel 122.35km Cheonggye Tunnel (Pangyo) 4 lanes

Quantity: L = 450m, H = 4m, Washing area: 1800㎡

Test construction date 2008. 10. 07 (Tue) 14: 00 ~ 15: 00

Indirect testing of the cleaning effect by diffusion reflectance test showed good results.

Table 2

Test Items unit standard
(Based on clean area) Test result Remarks BOD mg / L 30 or less 1.4 Water pollution process test criteria; 2008




COD 40 or less 4.4 Total nitrogen 30 or less 0.25 Total phosphorus 4 or less 0.25 Mineral oil in total normal hexane extractant 1 or less Not detected Animal and vegetable oils and fats among total normal hexane extractants 5 or less Not detected Phenols 1 or less Not detected CN- 0.2 or less Not detected Cr 0.5 or less 0.09 Soluble Fe 2 or less 1.52 Zn 1 or less 0.21 Cu 1 or less 0.16 CD 0.02 or less Not detected Hg 0.001 or less Not detected Organic 0.2 or less Not detected As 0.1 or less Not detected Pb 0.2 or less Not detected Hexavalent chrome 0.1 or less Not detected Soluble Mn 2 or less 0.18 F- 3 or less 12.6 PCB Not detected Not detected

Table 3

Test Items unit Standard (Clean Area Standard) Test result Test Methods Tetrachloroethylene mg / L 0.02 or less Not detected Water Pollution Process Test Criteria
2008 Trichloro
Ethylene mg / L 0.06 or less Not detected Anion interface
Active agent mg / L 3 or less Not detected pH (20 ℃) - 5.8-8.6 6.3 Suspended solids mg / L 30 or less Not detected Total coliform group CFU / mL 100 or less  48 Chromaticity Degree Less than 200  1 or less

After washing with the tunnel cleaner, the test results according to the environmental standard of water quality and water ecosystem according to Annex 1 of the Enforcement Decree of the Framework Act on Environmental Policy showed that the test results of various heavy metals were safe.

Claims (2)

In tunnel cleaners, Consists of cleaning agent and neutralizing agent, The cleaning agent is composed of 75.0 kg of water, 5.5 kg of surfactant, 15.5 kg of hydrofluoric acid, 0.5 kg of thickener, and 4.0 kg of glycol, The neutralizer is composed of 80.0 kg of water, 1.30 kg of nonionic surfactant, 0.5 kg of sodium carbonate, 0.5 kg of thickener, 5.0 kg of glycol, 0.2 kg of antifoam, The surfactant is a lauryl alcohol-based nonionic surfactant, an anionic surfactant using any compound selected from linear alkylbenzene sulfonic acid or its sodium salt, The thickener uses any one compound selected from natural salt, soluble starch, fructose, xanthan gum, The antifoaming agent A tunnel cleaner comprising at least one compound selected from an aqueous dispersion of a silicon compound, a polycarboxylic acid sodium salt, and a polycarboxylic acid sodium salt, or two or more compounds. In the tunnel cleaning method using a tunnel cleaner, 1st process 75.0 kg of water, 5.5 kg of nonionic surfactant, 15.5 kg of hydrofluoric acid, 0.5 kg of thickener, and 4.0 kg of glycol were mixed in a stirrer and stirred until the mixed solution became transparent to prepare a cleaning agent. 2nd process (neutralization agent manufacture) After mixing 80.0 kg of water, 1.30 kg of nonionic surfactant, 0.5 kg of sodium carbonate, 0.5 kg of thickener, 5.0 kg of glycol, and 0.2 kg of antifoaming agent in a stirrer, stirring until the mixed solution becomes transparent to prepare a neutralizer,   The surfactant is a lauryl alcohol-based nonionic surfactant, an anionic surfactant using any compound selected from linear alkylbenzene sulfonic acid or its sodium salt,  The thickener uses any one compound selected from natural salt, soluble starch, fructose, xanthan gum, The antifoaming agent Any one compound or two or more compounds selected from an aqueous dispersion of a silicon compound, a polycarboxylic acid sodium salt, and a polycarboxylic acid sodium salt are used, 3rd process (tunnel cleaning)  After washing the inside of the tunnel using a high-pressure sprayer at a pressure of 5 kg / ㎠ at 20 ~ 25 ℃ by diluting 100 kg of the detergent prepared in the first step in 20 ℃ water 300kg,   After 5 to 10 minutes, dilute 3000 kg of water at 20 ° C. to 100 kg of the neutralizing agent prepared in the second step, and secondly wash the inside of the tunnel using a high pressure sprayer at a pressure of 5 kg / cm 2 at 20 to 25 ° C. Tunnel cleaning method using a tunnel cleaner, characterized in that to neutralize the washing.