KR102294681B1 - Eco-friendly detergent composition for removing impurity of screen basket and cleaning method thereof - Google Patents

Abstract

An eco-friendly detergent composition for removing impurity of a screen basket of the present invention includes malic acid, citric acid, and sodium gluconate and is prepared by mixing the ingredients with water so as to include 1 to 15 wt% of malic acid, 1 to 15 wt% of citric acid, and 5 to 20 wt% of sodium gluconate, thereby mixing the ingredients with water at room temperature to form 100 wt%. The method of cleaning a screen basket of the present invention includes the following steps of: preparing an immersion tank capable of immersing the screen basket; filling the immersion tank with water; immersing the screen basket in the immersion tank; placing a cleaning agent composition in an immersion water bath and dissolving the cleaning agent composition in water; immersing the screen basket in an immersion tank for a certain period of time; and taking out the screen basket and performing spray cleaning with water. According to the present invention, scattering of dust is prevented, noise and odors are eliminated, and scale is completely removed by applying evenly on the entire surface of the basket frame and filter screen.

Description

Eco-friendly detergent composition for removing impurity of screen basket and cleaning method thereof

The present invention relates to an environmentally friendly cleaning agent composition for removing contaminants from a screen basket and a cleaning method therefor. More particularly, the present invention relates to a washing technique for filtering foreign substances from water taken into a screen basket installed in a power plant, water purification plant, etc., and removing fish and shellfish and scale attached to the screen basket.

BACKGROUND ART Various industrial plants such as power plants, desalination facilities, and water purification plants are provided with water intake facilities for taking in large-capacity water. The rotating screen device is connected by a chain to a screen module in the form of a basket including a frame that supports the filtration network, and a plurality of screen baskets are installed in the water intake passage and rotated to reach the upper part of the driving unit. Foreign substances adhering to the basket are continuously removed.

The filtered seawater is supplied as cooling water to a condenser and a CCW heat exchanger in the case of a power plant. However, seafood grows on the surface of the screen basket exposed to seawater over a long period of time. Fish and shellfish and foreign substances firmly attached to the screen interfere with the flow of the water intake channel, resulting in a large loss of power for driving the rotating screen device. In addition, if the transfer chain is loosened or partially damaged by the pressure applied to the screen basket, the screen basket must be replaced, which incurs maintenance costs.

In order to solve this problem, because the fish and shellfish that are firmly attached to the screen basket and are periodically removed using a hammer or other tool are removed by scraping or scraping the scraper, physical impact causes damage to the filter screen and frame. In addition, since a large number of screen baskets have to be disassembled, spread out one by one in a certain place, and reassembled after work is completed, not only a large work area is required, but also the scattering of broken fish and shellfish causes contamination and noise.

Contaminants attached to the screen basket are decomposed and odor is generated, it takes a long time to remove the fish and shellfish, and it is difficult to completely remove the fish and shellfish embedded between the surface of the structure of the screen basket and the filter net by a physical method. In addition, although the basket structure is mainly made of stainless steel, rust (metal oxide) is generated on the surface due to the corrosiveness of seawater, and the proliferation of fish and shellfish and seawater scale is accelerated on the roughened surface, so there is a problem that rust must be removed.

Registered Patent Publication No. 10-1582215 (announced date: 2016. 1. 5.) “Eco-friendly cleaning composition containing lactic acid” hereinafter referred to as “prior art 1”) was published. Prior art 1 relates to an eco-friendly cleaning composition containing lactic acid. More specifically, it includes citric acid, malic acid, oxalic acid, a reducing agent, a nonionic surfactant, and lactic acid, and is prepared by mixing these components with water. will be. Prior art 1 is an eco-friendly cleaning agent composition for cleaning a water purification plant, a wastewater tank, and an indoor water supply pipe, which includes citric acid, malic acid, oxalic acid, a reducing agent, a nonionic surfactant, and lactic acid, and is prepared by mixing these components with water, but , 1 to 15% by weight of citric acid, 1 to 15% by weight of malic acid, 1 to 10% by weight of oxalic acid, 0.01 to 2.5% by weight of a reducing agent, 0.01 to 0.5% by weight of a nonionic surfactant, 5 to 20% by weight of lactic acid, It is characterized in that the ingredients are mixed with water.

According to the prior art 1, in the cleaning agent for chemical cleaning of water purification plants and wastewater, the composition showed excellent dissolving power for scales containing iron oxide as the main component, and also contributed to environmental pollution and health hazards, and at the same time, rusted water in tap water. It can be usefully used to prevent water outflow, and has excellent effects such as resolving distrust in tap water. Prior art 1 can contribute to a more stable and effective supply of tap water because a chemical cleaner made of an eco-friendly material can be used in the water purification plant and waste basin washing.

Registered Patent Publication No. 10-1140217 (announced date: May 2, 2012) "Environment-friendly cleaning composition for water purification plant and waste basin washing" (hereinafter referred to as "Prior Art 2") was published. Prior art 2 includes Citric acid, Malic acid, Oxalic acid, hydrochloric acid, alcohol-based nonionic surfactant, and hydrogen peroxide, and for washing water purification plants, wastewater and water tanks, characterized in that these components are mixed with water It is an eco-friendly cleaning composition.

Prior art 2 is to provide a cleaning agent having an exceptional effect on removing iron oxide, manganese oxide, and aluminum oxide firmly adhered to the inner wall of a water purification plant and a reservoir.

The composition consists of Citric acid 1~10wt%, Malic acid 1~10wt%, Oxalic acid 1~10wt%, Hydrochloric acid (HCl) 1-2wt%, Surfactant LAE 0.01~0.1wt%, Reductant ascorbic acid 0.01~2.5wt %, containing 0.01 to 0.1 wt% of hydrogen peroxide, and mixing with water at room temperature to make a total of 100 wt%.

Laid-Open Patent Publication No. 10-2011-0125690 (published date: 2011. 11. 22.) “Descaler composition for removing scale (hereinafter referred to as prior art 3”) was published. Prior Art 3 relates to a cleaning composition comprising thiosulfate as a main component and at least one or more organic acids such as ascorbic acid, citric acid, adipic acid, succinic acid and tartaric acid. There is an effect of completely removing the scale that the chlorine-based detergent cannot remove by first washing the sample on which the scale is generated with the chlorine-based detergent and then washing it with the detergent composition according to the present invention.

Prior art 1 to 3 are different from the cleaning agent composition for removing fish and shellfish and impurities attached to the screen basket of the present invention, and have different technical ideas.

Registered Patent Publication No. 10-1372139 (announced date: March 12, 2014) "Acid bacteria cleaning apparatus and method" (hereinafter referred to as "Prior Art 4") has been published. Prior art 4 discloses a sterilization and washing apparatus capable of improving sterilization and washing efficiency. A sterilization washing method for sterilizing and washing a target object includes the steps of immersing the target object in washing water accommodated in a washing tank, supplying a disinfectant to the washing water, and irradiating ultrasonic waves to the washing water, and supplying the disinfectant And the radiation of the ultrasound proceeds at the same time.

(0001) Registered Patent Publication No. 10-1582215 (Announcement date: 2016. 1. 5.) (0002) Registered Patent Publication No. 10-1140217 (Announcement date: 2012. 5. 2.) (0003) Patent Publication No. 10-2011-0125690 (published date: 2011. 11. 22.) (0004) Registered Patent Publication No. 10-1372139 (Announcement date: 2014. 3. 12.)

The present invention has been devised to solve such problems, and an object of the present invention is to provide an eco-friendly cleaning composition for removing contaminants from a screen basket that does not cause dust scattering and can solve the problems of noise and odor.

Another object of the present invention is to provide a method of cleaning a screen basket that can easily and completely remove fish and shellfish that have grown and firmly attached to the screen basket without physical damage to the screen basket, and can shorten maintenance time and minimize maintenance space. is in

The eco-friendly cleaning composition for removing contaminants from the screen basket of the present invention contains malic acid, citric acid, and sodium gluconate, and is prepared by mixing these components with water, but does not contain hydrochloric acid, and further includes an amine compound in the cleaning composition And, the component is ureaamine or triethanolamine, and contains 1 to 15% by weight of malic acid, 1 to 15% by weight of citric acid, and 5 to 20% by weight of sodium gluconate, and mixing these components with water at room temperature It is characterized in that it is prepared to be 100% by weight and is easily dissolved in water at 20-30°C.
In addition, the cleaning composition for removing contaminants from the screen basket includes malic acid, citric acid, and sodium gluconate, prepared by mixing these components with water, does not contain hydrochloric acid, and further includes an amine compound in the cleaning composition, The component is ureaamine or triethanolamine, and contains 2 to 5% by weight of malic acid, 2 to 5% by weight of citric acid, and 2 to 5% by weight of sodium gluconate, 100% by weight by mixing these components with water at room temperature It is characterized in that it is easily soluble in water at 20-30 ° C.
The method of cleaning a screen basket of the present invention comprises the steps of: preparing an immersion tank capable of immersing the screen basket for a scale removal operation in a connected state without disassembling the screen baskets connected to each other; waterproofing the immersion tank;
filling the immersion tank with water; immersing the screen basket in the immersion tank; The cleaning composition for removing contaminants of the screen basket includes malic acid, citric acid, and sodium gluconate, prepared by mixing these components with water, does not include hydrochloric acid, and further includes an amine-based compound in the cleaning composition, The component is ureaamine or triethanolamine,
The cleaning composition comprising 1 to 15% by weight of the malic acid, 1 to 15% by weight of the citric acid, and 5 to 20% by weight of the sodium gluconate, prepared to be 100% by weight by mixing these components with water at room temperature Putting it in an immersion water bath and dissolving it in water at 20-30°C; performing water flow and aeration using a pump and compressed air in the step of dissolving the cleaning agent composition; immersing the screen basket in the immersion bath for 7 hours; It characterized in that it comprises the step of taking out the screen basket and spray washing with water.
In addition, the method of cleaning the screen basket of the present invention includes the steps of: preparing a immersion tank capable of immersing the screen basket for scale removal in a connected state without disassembling the screen baskets connected to each other; waterproofing the immersion tank;
filling the immersion tank with water; immersing the screen basket in the immersion tank; As a cleaning composition for removing impurities from the screen basket, it contains malic acid, citric acid, and sodium gluconate, and is prepared by mixing these components with water, but does not contain hydrochloric acid, and further includes an amine-based compound in the cleaning composition, The component is ureaamine or triethanolamine, and contains 2 to 5% by weight of the malic acid, 2 to 5% by weight of the citric acid, and 2 to 5% by weight of the sodium gluconate. These components are mixed with water at room temperature to 100% by weight. % of the detergent composition prepared to be dissolved in water of 20 ~ 30 ℃ into the immersion tank;
performing water flow and aeration using a pump and compressed air in the step of dissolving the cleaning agent composition; immersing the screen basket in the immersion bath for 7 hours; It characterized in that it comprises the step of taking out the screen basket and spray washing with water.

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The eco-friendly cleaning agent composition for removing contaminants from the screen basket of the present invention is a water-soluble scale remover, and since it is removed by immersion in the screen basket, the scattering of dust does not occur and the problems of noise and odor are solved. The cleaning method of the screen basket of the present invention has the effect of not causing physical damage to the screen basket by excluding physical damage.

In addition, according to the present invention, the eco-friendly cleaning agent composition is dissolved in the immersion water tank and uniformly acts on the entire surface of the basket frame and the filter net to completely remove scale. The cleaning method of the screen basket of the present invention has the advantage of shortening the construction time because a plurality of baskets can be simultaneously worked in a narrow workshop because scale can be removed in a connected state without disassembling the connected basket.

1 is a view of an immersion tank of the present invention.
Figure 2 is a view of the structure of a general screen basket.
3 is a view showing a state in which a plurality of baskets are immersed in an immersion tank.
4 is a photograph showing a state in which the scale of the screen basket is attached.
5 is a photograph showing a state in which the scale of the screen basket is removed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 is a view of the immersion tank of the present invention, Figure 2 is a view of the structure of a general screen basket. 3 is a view showing a state in which a plurality of baskets are immersed in a immersion tank, FIG. 4 is a photo showing a state in which the scale of the screen basket is attached, and FIG. 5 is a photo showing a state in which the scale of the screen basket is removed.

"% by weight" used as a unit of content in the present invention indicates a relative content.

1 is a view of an immersion tank of the present invention. As shown in FIG. 1 , the immersion tank 1 has an iron plate 3 on the bottom, and a rectangular iron plate 2 is coupled at a right angle around a rectangle. The edge 4 is joined by riveting or welding. In order to fill the inside of the immersion tank (1) with water, waterproofing is essential. For waterproofing, a waterproofing liquid is applied or a tarpaulin 5 such as vinyl is installed so as to completely cover the interior where the bottom iron plate 3 and the square iron plate 2 are combined. In one embodiment of the present invention, the inside of the immersion tank 1 covers the tarpaulin 5 as shown in FIG. 3 .

Figure 2 is a view of the structure of a general screen basket.

The screen basket 10 has a rectangular parallelepiped shape, and the frame 11 supporting the filtering net 12 located in the center, and the fixing pieces 13 are coupled to both sides. In general, the screen basket 10 has a shape in which the frame 11 and the filtering net 12 are welded and assembled.

[Problems of the prior art]

The screen baskets installed in industrial plants such as power plants, water purification plants, and desalination facilities are exposed to seawater for a long time, so that the seafood and shellfish proliferate on the surface of the screen basket. The power loss for driving is large. In addition, if the transfer chain is loosened or partially damaged by the pressure applied to the screen basket, the screen basket must be replaced, which incurs maintenance costs. In order to solve this problem, the filter net and frame are damaged by physical impact because the fish and shellfish that are firmly attached to the screen basket and are periodically removed using a hammer or the like are struck with a tool or scraped off the scraper.

In addition, a large number of screen baskets must be disassembled, spread out one by one in a certain place, washed, and reassembled after work is completed. have. In addition, impurities attached to the screen basket are decomposed and odor is generated, it takes a long time to remove the fish and shellfish, and it is difficult to completely remove the fish and shellfish stuck between the surface of the screen basket structure and the filter net by a physical method.

In addition, although the screen basket structure is mainly made of stainless steel, rust (metal oxide) is generated on the surface due to the corrosiveness of seawater, and the proliferation of fish and shellfish and seawater scale is accelerated on the roughened surface, so there is a problem that rust must be removed. In order to solve this problem, an eco-friendly diaphragm cleaning agent composition for removing contaminants from the screen basket and a cleaning method for the screen basket have been devised.

[An embodiment of the present invention]

3 is a view showing a state in which a plurality of baskets are immersed in an immersion tank.

In the immersion tank (1), a tarpaulin (5) such as vinyl is laid inside, so that the water filled in the immersion tank (1) does not count. A plurality of baskets 20 are immersed in the immersion tank 1 . The immersion tank (1) is filled with water, and the cleaning agent composition (30) is dissolved in water.

In order to remove the seafood and foreign matter attached to the screen basket 10, a plurality of baskets 20 bound by a connecting member are immersed in a prefabricated immersion tank 1, and the cleaning agent 30 is dissolved in water. .

The eco-friendly cleaning composition 30 for removing contaminants from the screen basket according to an embodiment of the present invention includes malic acid, citric acid, and sodium gluconate, and is prepared by mixing these components with water, but malic acid 1 to 15% by weight, citric acid 1 to 15% by weight, including 5 to 20% by weight of sodium gluconate, characterized in that it is prepared by mixing these components with water at room temperature to 100% by weight.

The cleaning composition 30 for removing fish and shellfish and contaminants according to another embodiment of the present invention includes malic acid, citric acid, and sodium gluconate, and is prepared by mixing these components with water,

2 to 5% by weight of the malic acid, 2 to 5% by weight of the citric acid, and 2 to 5% by weight of the sodium gluconate, characterized in that it is prepared to 100% by weight by mixing these components with water at room temperature.

The eco-friendly cleaning agent composition 30 for removing contaminants from the screen basket of the present invention further includes an amine-based compound in the composition as an embodiment, and the component is ureaamine or triethanolamine.

In general, inorganic acids such as hydrochloric acid or sulfuric acid can be used to dissolve the scale of fish and shellfish and seawater and oxides on the metal surface to remove the scale of the screen basket. However, these inorganic acids are not only harmful to the air environment and human body, but also damage metal materials. In particular, when chlorine is applied to stainless steel, it causes surface erosion and the surface becomes rough, accelerating corrosion and proliferation of fish and shellfish and seawater scale.

The eco-friendly cleaning agent composition 30 for removing contaminants from the screen basket of the present invention does not cause chemical damage to the constituent materials of the screen basket, and dissolves fish and shellfish and seawater scale (main components are calcium and magnesium salts) with a solution and metal oxides (rust, iron oxide). ), which can dissolve organic acids and organic salts and corrosion inhibitor components.

Specifically, it is an organic acid and an organic salt such as malic acid, citric acid, sodium gluconate, and an amine-based compound as an anticorrosive and additive, and includes urea or triethanolamine.

The constituents of these chemicals have a property of being completely soluble in water, and the concentration of each constituent is 1 to 20% by weight, preferably 2 to 5% by weight.

The eco-friendly cleaning agent composition 30 for removing contaminants from the screen basket 10 of the present invention has low toxicity and high biodegradability, and can remove scale without causing any damage to the base material (mainly stainless steel and steel) of the screen basket. characteristic. It is preferable to use the suitable dissolution temperature of the cleaning composition of the attached fish and shellfish or impurities in the range of 0 to 40°C. Preferably the suitable dissolution temperature of the detergent composition is 20-30°C.

4 is a photograph showing a state in which the scale of the screen basket is attached.

As shown in the photo of FIG. 4, fish and shellfish and seawater scales are tightly accumulated over the entire surface of the frame 11 and the filter screen 12 supporting the screen basket 10 and the filter screen 12, and the surface of the basket is made of metal by seawater. Oxides are generated on the surface. Adhesive substances such as seawater scale interfere with the flow of seawater and increase the load on the screen system. 5 is a photograph showing a state in which the scale of the screen basket is removed.

According to the present invention, the entire basket is immersed in the scale solution and uniformly acts on the entire surface of the basket frame and the filter net to completely remove scale.

According to the present invention, since scale removal work can be performed in a connected state without disassembling the connected baskets, a plurality of baskets can be simultaneously worked in a narrow workshop, thereby reducing the construction time.

below. The washing method of the screen basket of the present invention will be described.

A method for washing a screen basket according to an embodiment of the present invention

(1) preparing an immersion tank (1) capable of immersing the screen basket (10);

(2) filling the immersion tank (1) with water;

(3) immersing the screen basket (10) in the immersion tank (1);

(4) dissolving the environmentally friendly cleaning agent composition 30 in water into an immersion water bath;

(5) immersing the screen basket 10 in the immersion tank for a certain period of time;

(6) taking out the screen basket 10 and performing spray washing with water.

In the step of supplying and dissolving the eco-friendly cleaning agent composition 30 to the immersion tank 1, the screen basket 10 immersed in the solution is rapidly removed as the temperature of the solution is higher and the amount of scale attached is smaller, The concentration of the solution and the scale removal time can be adjusted according to the amount of scale attached.

A suitable temperature for dissolving the eco-friendly cleaning agent composition 30 is preferably in the range of 0 to 40 °C. In a preferred embodiment, a suitable temperature for dissolving the detergent composition is 20-30°C.

In the step of preparing the immersion tank 1 in which the screen basket 10 can be immersed, the step of installing a tarpaulin 5 such as vinyl inside the immersion tank 1 is further included.

In the step of immersing the screen basket 10 in the immersion tank 1 for the predetermined time, the time for immersing the screen basket is 4 to 12 hours. The immersion time of the best embodiment is 7 hours.

When the removal of the scale of the screen basket 10 is completed in the step of taking out the screen basket 10 after the cleaning operation is completed, it is lifted from the immersion tank 1 and spray cleaned with water to complete the scale removal operation. The present invention inserts a plurality of screen baskets 20 into the immersion tank 1 in the immersion tank 1 that can be immersed without disassembling a plurality of baskets, and inserts the eco-friendly cleaning agent composition 30 into the screen basket (10) The detergent composition 30 is immersed and dissolved.

Water flow and aeration are performed using a pump and compressed air for the cleaning solution in the tank so that the fish and shellfish and seawater scale can be well dissolved. When the fish and shellfish and seawater scale and rust (metal oxide) have been removed, spray washing with water to complete the cleaning operation.

In the above, the present invention has been described with reference to specific embodiments, but may be practiced in other embodiments within the same technical spirit, and equivalents may be used as substitutes, and the present invention is not limited to the disclosed embodiments.

According to the present invention, since the screen basket is placed in the immersion water tank and the eco-friendly cleaning agent composition is dissolved and acts uniformly on the entire surface of the basket frame and the filter net, contaminants attached to the screen basket can be completely removed. It is a useful invention in the industrial field.

1: immersion tank 2: square iron plate
3: Bottom plate 5: Tarpaulin
10: screen basket 11: frame
12: filter net 13: fixed piece
20: multiple screen baskets 30: cleaning composition

Claims (8)

The cleaning composition for removing contaminants from the screen basket includes malic acid, citric acid, and sodium gluconate, prepared by mixing these components with water, does not contain hydrochloric acid, and further includes an amine compound in the cleaning composition, and the component is ureaamine or triethanolamine,
1 to 15% by weight of the malic acid, 1 to 15% by weight of the citric acid, and 5 to 20% by weight of the sodium gluconate, prepared by mixing these components with water at room temperature to 100% by weight An eco-friendly cleaning composition for removing contaminants from a screen basket, characterized in that it is easily soluble in water.
The cleaning composition for removing contaminants from the screen basket includes malic acid, citric acid, and sodium gluconate, prepared by mixing these components with water, does not contain hydrochloric acid, and further includes an amine compound in the cleaning composition, and the component is ureaamine or triethanolamine,
2 to 5% by weight of the malic acid, 2 to 5% by weight of the citric acid, and 2 to 5% by weight of the sodium gluconate, mixed with water at room temperature to make 100% by weight An eco-friendly cleaning composition for removing contaminants from a screen basket, characterized in that it is easily soluble in water. delete A method for cleaning a screen basket, comprising:
preparing a immersion tank capable of immersing the screen baskets for scale removal in a connected state without disassembling the screen baskets connected to each other;
waterproofing the immersion tank;
filling the immersion tank with water;
immersing the screen basket in the immersion tank;
The cleaning composition for removing contaminants of the screen basket includes malic acid, citric acid, and sodium gluconate, prepared by mixing these components with water, does not include hydrochloric acid, and further includes an amine-based compound in the cleaning composition, The component is ureaamine or triethanolamine,
The cleaning composition comprising 1 to 15% by weight of the malic acid, 1 to 15% by weight of the citric acid, and 5 to 20% by weight of the sodium gluconate, prepared to be 100% by weight by mixing these components with water at room temperature Putting it in an immersion water bath and dissolving it in water at 20-30°C;
performing water flow and aeration using a pump and compressed air in the step of dissolving the cleaning agent composition;
immersing the screen basket in the immersion bath for 7 hours;
taking out the screen basket and performing spray washing with water;
A method of cleaning a screen basket comprising a. A method for cleaning a screen basket, comprising:
preparing a immersion tank capable of immersing the screen baskets for scale removal in a connected state without disassembling the screen baskets connected to each other;
waterproofing the immersion tank;
filling the immersion tank with water;
immersing the screen basket in the immersion tank;
As a cleaning composition for removing impurities from the screen basket, it contains malic acid, citric acid, and sodium gluconate, and is prepared by mixing these components with water, but does not contain hydrochloric acid, and further includes an amine-based compound in the cleaning composition, Its component is ureaamine or triethanolamine,
The cleaning composition comprising 2 to 5% by weight of the malic acid, 2 to 5% by weight of the citric acid, and 2 to 5% by weight of the sodium gluconate, prepared to be 100% by weight by mixing these components with water at room temperature, Putting it in an immersion water bath and dissolving it in water at 20-30°C;
performing water flow and aeration using a pump and compressed air in the step of dissolving the cleaning agent composition;
immersing the screen basket in the immersion bath for 7 hours;
taking out the screen basket and performing spray washing with water;
A method of cleaning a screen basket comprising a.

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