KR102661265B1 - Fine dust reduction device and operation method of fine dust reduction device - Google Patents

Abstract

The present invention relates to a technology for developing a fine dust reduction device with added deodorization and sterilization functions using catalytic reduction technology. The fine dust reduction device according to one embodiment includes a plurality of storage devices, each storing a different solution. A tank, an information collection unit that collects environmental information including fine dust concentration, a control unit that sets a mixing ratio for the solutions stored in the plurality of storage tanks based on the collected environmental information, and according to the set mixing ratio It may include a spray processing unit that controls the different solutions flowing in from each of the plurality of storage tanks to be sprayed through the injection port.

Description

Fine dust reduction device and operation method of fine dust reduction device {Fine dust reduction device and operation method of fine dust reduction device}

The present invention relates to a fine dust reduction device and a method of operating the fine dust reduction device, and more specifically, to a technology for developing a fine dust reduction device with added deodorization and sterilization functions using catalytic reduction technology.

Fine dust is a thin, small-sized dust that is difficult to discern with the naked eye. It is an air pollutant mainly produced during the oxidation of fuel in factories or automobiles, or when various pollutants react in the air through various photochemical reactions.

A representative substance contained in fine dust is sulfur dioxide. Sulfur dioxide is sulfur dioxide, an inorganic compound with the chemical formula SO _2. Also called sulfur dioxide gas or sulfurous anhydride, it is a colorless, toxic gas with a pungent odor.

Meanwhile, as another representative substance, nitrogen _oxide nitrogen oxide ( _NO

Meanwhile, ozone (molecular formula: O3) is made up of three oxygen atoms, and its strong oxidizing power is useful for sterilizing sewage and removing bad odors. It also forms an ozone layer in the Earth's atmosphere and acts as a protective film. Although it plays a good role, ozone produced on the ground surface is an air pollutant that is harmful to human health.

Additionally, carbon monoxide is a compound composed of carbon and oxygen. Its molecular formula is CO, and it is sometimes contained in the air of industrial areas where large amounts of coal or oil are burned, and is also contained in city gas supplied to homes.

Occurs when carbon compounds are burned incompletely. It is flammable and toxic, so care must be taken when handling it, and since it has about 200 times greater affinity with hemoglobin than oxygen, inhalation of even a small amount can interfere with respiratory metabolism and make life difficult, so care must be taken.

Since the 2000s, the amount of dangerous fine dust has increased significantly and has become a social issue. In addition, due to the increase in fine dust, when fine dust enters the body during daily life, it creates active oxygen, causing problems that have a detrimental effect on people's health, such as various skin diseases, respiratory diseases, and cerebrovascular diseases.

In Korea, the health threat caused by fine dust is at a serious level internationally. Based on the number of days exceeding the air quality standard (25㎍/㎥, 'normal' in the forecast) in a year, the air quality is the worst among OECD countries (average: 12.35 days) at 23.83 days (OECD, 2015) ), based on the proportion of the population exposed to air pollution, the proportion of the population exposed to air quality exceeding 25㎍/㎥ is 47%, the highest among the OECD country average (3%).

Despite the government's continuous preparation and implementation of policies to improve the air environment (air quality), domestic air quality is not improving noticeably.

This is because the amount of fine dust generated is also increasing due to the increase in the number of cars and the increase in carbon dioxide emissions from industries such as numerous factories and data centers. As a result, interest in the impact on health is also increasing. In addition, the International Agency for Research on Cancer (IARC) under the WHO designated fine dust as a group 1 carcinogen, and depending on the size of the particle, the smaller it is, the deeper it reaches the respiratory tract, and the surface area is larger than that of larger particles. Because it is large, it is easily absorbed into the organs of the human body.

Short-term or long-term exposure to fine dust can have a fatal impact on the health of people with underlying diseases such as chronic respiratory diseases, children, and the elderly.

Therefore, as the issue of fine dust reduction continues to surface, technology to reduce fine dust in crowded spaces such as bus stops, terminals, train station waiting rooms, and airports is being developed to ensure the comfort of crowded spaces and health-related issues such as air hygiene. Development is urgently needed.

Korean Patent No. 2064137 “Air purification device that adjusts the amount of solution sprayed in response to the amount of fine dust” Korean Patent No. 2194039 “Spray system for reducing fine dust and urban heat island”

The purpose of the present invention is to manage fine dust at an appropriate level in places frequently used by citizens, such as bus stops, subway platforms, parks, and outdoor sports facilities.

The purpose of the present invention is to reduce fine dust and create an antibacterial space through mist spraying of semiconductor nanoparticles (Ag:ZnFe2O4) colloid, which has a sterilizing and deodorizing effect when exposed to visible light, and to suppress the spread of infectious pathogens through the air. do.

The purpose of the present invention is to improve the health of users by reducing fine dust, including smoke, in the space by spraying it through a nozzle according to a pre-entered operating algorithm such as human body detection, crowded time, location, solution injection amount, and air quality measurement. Do this.

The purpose of the present invention is to detect and analyze environmental changes (by season, by weather, by time of day, etc.) and to secure data that can predict the occurrence of fine dust in advance and take measures before occurrence rather than reducing it after occurrence.

The purpose of the present invention is to improve budget efficiency and improve air quality and sanitary environment in spaces used by citizens by preemptively investing in facilities in areas where outbreaks are expected to occur by utilizing the secured data.

The purpose of the present invention is to develop an outdoor fine dust and harmful gas reduction device using catalytic reduction technology with our company by utilizing fine dust measurement sensor development technology.

A fine dust reduction device according to an embodiment includes a plurality of storage tanks each storing different solutions, an information collection unit for collecting environmental information including fine dust concentration, and a plurality of storage tanks based on the collected environmental information. It may include a control unit that sets the mixing ratio for the solutions stored in the storage tank, and a spray processing unit that controls to spray the different solutions flowing from each of the plurality of storage tanks through the injection port according to the set mixing ratio. .

The plurality of storage tanks according to one embodiment include a first liquid storage tank, a second liquid storage tank, and a third liquid storage tank storing different solutions, among the first liquid storage tank to the third liquid storage tank. It may include at least one metering pump for pumping the solution, and a mixing tank for mixing the pumped and collected solution.

The spray processing unit according to one embodiment may include a pressure pump that pumps the solution mixed in the mixing tank, and a fine spray nozzle that sprays the pumped solution through a fine hole.

The fine dust reduction device according to one embodiment further includes a human body detection sensor that determines whether a person is located within a selected distance, and the spray processing unit temporarily stops spraying the solution or moves in another direction when the person is located. You can control the spraying of the solution only with .

The information collection unit according to one embodiment further collects public data, and the control unit further considers the collected public data as the environmental information and sets a mixing ratio for the solutions stored in the plurality of storage tanks. there is.

The plurality of storage tanks according to one embodiment include a first liquid storage tank, a second liquid storage tank, and a third liquid storage tank, and the first liquid storage tank includes a carboxylic acid peroxide solution and the second liquid. The visible light-activated photocatalyst colloid solution can be stored in the storage tank, and purified water or tap water can be stored in the third liquid storage tank.

According to one embodiment, in at least one of the first liquid storage tank to the third storage tank, a liquid catalyst may be added at a first reference temperature or higher, and a warmer may be supplemented at a second reference temperature or lower.

A method of operating a fine dust reduction device according to an embodiment includes the steps of storing different solutions in each of a plurality of storage tanks, collecting environmental information including fine dust concentration, and based on the collected environmental information, the plurality of It may include setting a mixing ratio for the solutions stored in the storage tank, and controlling the different solutions flowing in from each of the plurality of storage tanks to be sprayed through the injection port according to the set mixing ratio. .

The operating method of the fine dust reduction device according to one embodiment further includes the step of determining whether a person is located within a selected distance, and the step of controlling to spray temporarily suspends the spraying of the solution when the person is located. It may include stopping or controlling the solution to be sprayed only in another direction.

The step of collecting the environmental information according to an embodiment further includes collecting public data, and the step of setting the mixing ratio further considers the collected public data as the environmental information, and further includes the step of collecting public data. It may include the step of setting the mixing ratio for the solutions stored in the storage tank.

According to one embodiment, fine dust in places frequently used by citizens, such as bus stops, subway platforms, parks, and outdoor sports facilities, can be managed to an appropriate level.

According to one embodiment, semiconductor nanoparticles (Ag:ZnFe2O4) colloids, which have a sterilizing and deodorizing effect when exposed to visible light, are sprayed as mist to reduce fine dust and create an antibacterial space to suppress the spread of infectious pathogens through the air. You can.

According to one embodiment, the health of users is improved by reducing fine dust, including smoke, in the space by spraying it through a nozzle according to a pre-entered operation algorithm such as detection of human body, crowded time zone, location, solution injection amount, and air quality measurement. can promote.

According to one embodiment, by detecting and analyzing environmental changes (by season, by weather, by time of day, etc.), it is possible to secure data that can predict the occurrence of fine dust in advance and take measures before occurrence rather than reducing it after occurrence. .

According to one embodiment, by using the secured data, it is possible to preemptively invest in facilities in areas where outbreaks are expected to increase budget efficiency and improve air quality and sanitary environments in spaces used by citizens.

According to one embodiment, by utilizing the misen dust measurement sensor development technology, we can develop an outdoor fine dust and harmful gas reduction device using catalytic reduction technology.

Figure 1 is a diagram illustrating the technical concept of fine dust storage and control according to an embodiment.
Figure 2 is a diagram explaining a structure using a plurality of storage tanks to mix and spray different solutions.
Figure 3 is a diagram illustrating in more detail a fine dust reduction device according to an embodiment.
Figures 4a and 4b are diagrams explaining the fine dust reduction process.
Figure 5 is a diagram explaining a method of reducing fine dust according to an embodiment.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are merely illustrative for the purpose of explaining the embodiments according to the concept of the present invention. They may be implemented in various forms and are not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The above terms are used solely for the purpose of distinguishing one component from another, for example, a first component may be named a second component, without departing from the scope of rights according to the concept of the present invention; Similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between. Expressions that describe the relationship between components, such as “between”, “immediately between” or “directly adjacent to”, should be interpreted similarly.

The terminology used herein is only used to describe specific embodiments and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate the presence of a described feature, number, step, operation, component, part, or combination thereof, and one or more other features or numbers, It should be understood that this does not exclude in advance the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, the scope of the patent application is not limited or limited by these examples. The same reference numerals in each drawing indicate the same members.

Figure 1 is a diagram illustrating a technical conceptual diagram 100 of fine dust storage and control according to an embodiment.

Looking at the technical concept diagram 100 of fine dust storage and control, the central controller 110 is equipped with temperature and humidity, sulfur dioxide, carbon monoxide and fine dust sensors, and can control the injection device by collecting and analyzing measurement data from the sensors. .

The central controller 110 according to one embodiment uses information collected from the temperature and humidity and fine dust sensor 120 and temperature, humidity, and fine dust data collected from the government public data system 130 to reduce fine dust. The catalyst injection device 140 can be operated.

For this purpose, the central controller 110 can receive a certain amount of catalyst from the catalyst 150.

The central controller 110 can be controlled through a fine dust reduction device management program.

For example, the fine dust reduction device management program monitors real-time temperature, humidity, and fine dust data by installation area, sets standards for sensors and injection devices, analyzes catalyst usage and injection result data, and analyzes changes in fine dust. You can.

Taking a bus stop as an example, it is a place where there is a lot of change in users depending on the time of day and a lot of volatility depending on the weather and season. By analyzing public data and sensor data installed in the fine dust reduction device in real time, the injection amount of the liquid catalyst injection device is controlled. It can reduce fine dust around you.

In this process, the liquid catalyst can be used efficiently, which can lead to extended usage time and reduced operating costs, and a human body detection sensor has been installed to prevent the spray from being sprayed directly on users. You can prevent it from happening.

Figure 2 is a diagram illustrating a fine dust reduction device 200 that uses a plurality of storage tanks to mix and spray different solutions.

The fine dust reduction device 200 according to one embodiment includes a plurality of storage tanks 210, 220, 230 each storing different solutions, and an information collection unit 260 that collects environmental information including fine dust concentration. , a control unit 240 that sets the mixing ratio for the solutions stored in a plurality of storage tanks based on the collected environmental information, and sprays different solutions flowing from each of the plurality of storage tanks through the injection port according to the set mixing ratio. It may include a spray processing unit 250 that controls it.

According to reference numeral 200, a plurality of storage tanks are separately provided, including a first liquid storage tank 210, a second liquid storage tank 220, and a third liquid storage tank 230, and a control device 240 is used to The titration solution can be pumped and mixed from each storage tank.

In Korea, due to the nature of the four seasons, it must have a winter freeze prevention function to be used outdoors.

For this purpose, a liquid catalyst can be used above a certain temperature (-15 degrees Celsius), and a warmer can be used at temperatures below a certain temperature to prevent freezing.

For example, the first liquid storage tank 210 may contain a carboxylic acid peroxide solution, and the second liquid storage tank 220 may contain a visible light-activated photocatalyst colloid solution. Additionally, the third liquid storage tank 230 may contain purified water or tap water.

The information collection unit 260 can collect environmental information such as temperature, humidity, and micro-temperature values in real time. The control unit 240 can set the mixing ratio using the environmental information collected by the information collection unit 260, and can pump and mix the solution from the storage tank according to the set mixing ratio.

The information collection unit 260 according to one embodiment may collect more public data. Accordingly, the control unit 240 can set the mixing ratio for the solutions stored in a plurality of storage tanks by further considering public data collected as environmental information.

The spray processing unit 250 including a fine spray nozzle can spray the mixed solution to places and structures, such as buildings and bus stops.

For example, the fine dust reduction device 200 may further include a human body detection sensor (not shown) that determines whether a person is located within a selected distance.

Accordingly, the spray processing unit 250 can temporarily stop spraying the solution when a person is present or control the solution to be sprayed only in a different direction.

Figure 3 is a diagram illustrating in more detail a fine dust reduction device according to an embodiment.

The plurality of storage tanks may include a first liquid storage tank 311, a second liquid storage tank 332, and a third liquid storage tank 331 that store different solutions.

Additionally, each storage tank may include respective metering pumps 312, 322, and 332 for pumping the stored solution.

Additionally, the solutions pumped from each of the metering pumps 312, 322, and 332 may be collected in the mixing tank 340 and mixed at a certain ratio.

The spray processing unit may include a pressure pump 350 that pumps the solution mixed in the mixing tank 340, and a fine spray nozzle 360 that sprays the pumped solution through a fine hole.

For example, the first liquid storage tank 311 may contain a carboxylic acid peroxide solution. Specifically, it may contain 1-2% carboxylic acid peroxide, carboxylic acid, hydrogen peroxide, phosphoric acid, stabilizer, purified water, etc.

Additionally, the second liquid storage tank 332 may contain a visible light active photocatalyst colloidal solution, and specifically may contain 0.1% or less of zinc iron oxide, 0.1% or less of titanium dioxide, purified water, etc.

Additionally, the third liquid storage tank 331 may contain a certain amount of purified water or tap water.

4A to 4B are diagrams explaining the fine dust reduction process.

Figure 4a shows the process of absorbing suspended fine dust and shows the air disinfection process for decomposing soot AOP.

That is, Figure 4a shows the first step of fine dust reduction by a fine dust reduction device according to an embodiment, and can be interpreted as a step in which the mist sprayed from the nozzle combines with fine dust.

In addition, the visible light-activated photocatalyst mist of Figure 4a has the effect of decomposing not only fine dust but also soot.

Figure 4b shows the fine dust settling process and shows the sterilization and deodorization process through photocatalyst suspension.

Figure 4b is the second stage of fine dust reduction by a fine dust reduction device according to an embodiment. The mist and fine dust combine to deposit fine dust on the floor, and the sterilization and deodorization effect is achieved through photocatalyst particles that float and then gradually settle. You can enjoy

Figure 4c shows the three stages of fine dust reduction by a fine dust reduction device according to an embodiment, and shows the decomposition process of AOP remaining in deposition.

Through a three-step process, fine dust deposited on the floor 432 or wall 431 can be biodegraded and destroyed into harmless mineral components through AOP.

In other words, the present invention can improve the quality of life by providing a comfortable environment by simultaneously performing sterilization and deodorization in places frequently used by citizens along with the effect of reducing fine dust through the previous three stages of exaggeration.

Figure 5 is a diagram explaining a fine dust reduction method according to an embodiment.

The fine dust reduction method according to one embodiment may store different solutions in each of a plurality of storage tanks (step 510).

Next, the fine dust reduction method according to an embodiment may collect environmental information including fine dust concentration (step 520).

In addition, the fine dust reduction method according to one embodiment can set a mixing ratio for the solutions stored in a plurality of storage tanks based on the collected environmental information (step 530), and the plurality of storage tanks according to the set mixing ratio. The different solutions flowing in from each can be controlled to be sprayed through the injection nozzle (step 540).

Ultimately, using the present invention, it is possible to manage fine dust at an appropriate level in places frequently used by citizens, such as bus stops, subway platforms, parks, and outdoor sports facilities.

In addition, using the present invention, fine dust is reduced through mist spraying of semiconductor nanoparticles (Ag:ZnFe2O4) colloids, which have a sterilizing and deodorizing effect when exposed to visible light, and an antibacterial space is created to prevent the spread of infectious pathogens through the air. It can suppress the health of users by spraying it through a nozzle according to a pre-entered operating algorithm such as human body detection, crowded time, location, solution injection amount, and air quality measurement, thereby reducing fine dust, including smoke, in the space. It can be promoted.

In addition, by detecting and analyzing environmental changes (by season, by weather, by time of day, etc.), it is possible to predict the occurrence of fine dust in advance and secure data that can be used to take measures before occurrence rather than reducing it after occurrence. By using data, we can preemptively invest in facilities in areas where outbreaks are expected to increase budget efficiency and improve air quality and sanitary environments in spaces used by citizens.

In addition, the present invention can utilize the fine dust measurement sensor development technology to develop an outdoor fine dust and harmful gas reduction device using catalytic reduction technology with our company.

The device described above may be implemented with hardware components, software components, and/or a combination of hardware components and software components. For example, devices and components described in embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA), It may be implemented using one or more general-purpose or special-purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. A processing device may execute an operating system (OS) and one or more software applications that run on the operating system. Additionally, a processing device may access, store, manipulate, process, and generate data in response to the execution of software. For ease of understanding, a single processing device may be described as being used; however, those skilled in the art will understand that a processing device includes multiple processing elements and/or multiple types of processing elements. It can be seen that it may include. For example, a processing device may include a plurality of processors or one processor and one controller. Additionally, other processing configurations, such as parallel processors, are possible.

Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing unit to operate as desired, or may be processed independently or collectively. You can command the device. Software and/or data may be used on any type of machine, component, physical device, virtual equipment, computer storage medium or device to be interpreted by or to provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. Software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be specially designed and configured for the embodiment or may be known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes optical media (magneto-optical media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with limited drawings as described above, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the claims described below.

Claims (10)

A plurality of storage tanks each storing different solutions;
An information collection unit that collects fine dust concentration;
a control unit that sets a mixing ratio for the solutions stored in the plurality of storage tanks based on the collected fine dust concentration;
A spray processing unit that controls to spray the different solutions flowing from each of the plurality of storage tanks through the injection port according to the set mixing ratio.
includes
The plurality of storage tanks include a first liquid storage tank, a second liquid storage tank, and a third liquid storage tank,
The first liquid storage tank contains a carboxylic acid peroxide solution,
The second liquid storage tank contains a visible light-activated photocatalyst colloid solution, and
The third liquid storage tank contains purified water or tap water.
A fine dust reduction device characterized by storing. According to paragraph 1,
The plurality of storage tanks,
A first liquid storage tank, a second liquid storage tank, and a third liquid storage tank storing different solutions,
A metering pump for pumping the solution from at least one of the first liquid storage tank to the third liquid storage tank, and
A mixing tank for mixing the pumped and collected solutions.
A fine dust reduction device including a. According to paragraph 2,
The injection processing unit,
A pressure pump that pumps the solution mixed in the mixing tank; and
A fine spray nozzle that sprays the pumped solution through a fine hole.
A fine dust reduction device comprising a. According to paragraph 1,
Human body detection sensor that determines whether a person is located within a selected distance
It further includes,
The injection processing unit,
A fine dust reduction device characterized in that when the person is located, the spraying of the solution is temporarily stopped or the solution is controlled to be sprayed only in a different direction. According to paragraph 1,
The information collection department,
Collect more public data,
The control unit further considers the fine dust concentration and the collected public data and sets a mixing ratio for the solutions stored in the plurality of storage tanks. delete According to paragraph 1,
At least one storage tank among the first liquid storage tank to the third liquid storage tank is,
A fine dust reduction device characterized in that a liquid catalyst is added above the first reference temperature, and a warmer is supplemented below the second reference temperature. In a plurality of storage tanks, storing different solutions in each of the plurality of storage tanks;
In the information collection unit, collecting fine dust concentration;
Setting, in a control unit, a mixing ratio for the solutions stored in the plurality of storage tanks based on the collected fine dust concentration; and
Controlling, in the spray processing unit, to spray the different solutions flowing from each of the plurality of storage tanks through the injection port according to the set mixing ratio.
Including,
The plurality of storage tanks include a first liquid storage tank, a second liquid storage tank, and a third liquid storage tank,
The step of storing different solutions in each of a plurality of storage tanks is:
The first liquid storage tank contains a carboxylic acid peroxide solution,
The second liquid storage tank contains a visible light-activated photocatalyst colloid solution, and
Storing purified water or tap water in the third liquid storage tank.
A method of operating a fine dust reduction device comprising: According to clause 8,
Step of determining whether a person is located within a selected distance from the human body detection sensor
It further includes,
The step of controlling to spray is,
A step of temporarily stopping the spraying of the solution when the person is located or controlling the spraying of the solution only in a different direction
A method of operating a fine dust reduction device comprising: According to clause 8,
Further including the step of collecting public data,
The step of setting the mixing ratio is,
Setting a mixing ratio for the solutions stored in the plurality of storage tanks, further considering the fine dust concentration and the collected public data.
Method of operating a fine dust reduction device including.