KR100564660B1 - Air Cleaning Apparatus using Ozone and Catalyst Material for Noxious Gas Removal - Google Patents

Abstract

In the present invention, interest in environmental pollution is increasing and various side effects accompanying environmental pollution occur in industrial sites and general homes, so as to solve this problem, sulfur oxides (SOx) and nitrogen, which are harmful to humans, exist in the air. The present invention relates to a device for supplying cleaner air to workers or the general public by decomposing and rapidly removing oxides (NOx), volatile organic compounds (VOCs), and odors using ozone and harmful gas decomposition catalyst materials. More specifically, the present invention primarily removes harmful gases, bacteria, and odors present in the air by generating ozone using corona discharge and oxygen in the air at high pressure, and the air removed first is a harmful gas decomposition catalyst material. The built-in harmful gas removal filter is passed through to remove harmful gases, bacteria, and odors in the air in a secondary manner, leading to clean air, and not reacting in the ozone generated in the last step to remove the primary harmful gas. By decomposing and treating the remaining harmful human ozone with ozone decomposition catalyst material, it is possible to decompose and process various harmful gases, bacteria ozone and odors in the air and to always supply clean air of the level required by industrial sites and homes. It is a feature of the present invention to provide an air purifying apparatus.

Hazardous gas removal catalyst, dry air purification, ozone, ozone decomposition catalyst.

Description

Air Cleaning Apparatus using Ozone and Catalyst Material for Noxious Gas Removal}

1 is a schematic diagram of an air purifying apparatus employing a noxious gas decomposition catalyst according to the present invention.

2 is a schematic diagram of an air purifying apparatus employing ozone and a noxious gas decomposition catalyst according to the present invention.

<Short description of drawing number>

One ; Filter with built-in harmful gas decomposition catalyst

2 ; Ozone generator 3; Hazardous Gas Suction Fan

4 ; A filter 5 containing an ozone decomposition catalyst; Means of movement of the device (wheels)

6; Power supply terminal 7; Hazardous Gas Intake

8 ; Outlets of purified air 9, 10; Hazardous Gas Detection Sensor

11; Ozone sensor 12; Display panel (LCD, EL)

In the present invention, interest in environmental pollution is increasing and various side effects accompanying environmental pollution occur in industrial sites and general homes, so as to solve this problem, sulfur oxides (SOx) and nitrogen, which are harmful to humans, exist in the air. Oxide (NOx), volatile organic compounds (VOCs) and odors and the like by using ozone and harmful gas decomposition catalyst material to dissolve quickly and to provide a cleaner or supply to the general public.

In the prior art, two methods, dry gas treatment and wet gas treatment, are mainly used. The dry method is a method of adsorbing harmful gas particles using activated carbon and slaked lime or removing harmful gases by chemical reaction, and thus the treatment efficiency is relatively low. There is a problem that the maintenance cost is high, and the wet method is to clean the harmful gas by using water and caustic soda, and the efficiency of removing the harmful gas is relatively low, and the additional cost for installing the wastewater treatment system requires a large economic burden. have. In addition, in the case of the dry method using the activated carbon and slaked lime, there is a problem in that the air flow is not good in forming the internal structure of the air purifier, so that the harmful gas treatment capacity is greatly reduced.

The technical problem to be achieved by the present invention is to recognize the problems of the prior art as described above, and the harmful sulfur oxides (SOx), nitrogen oxides (NOx), volatile organic compounds (VOCs) and odors generated in the industrial field Various types of gases are reacted with ozone to decompose and remove them firstly, and secondly to increase the contact area with harmful gases, to increase the contact time between them, and to expand the contact area containing harmful gas decomposition catalyst materials. Noxious gas decomposition catalyst (hereinafter simply referred to as a noxious gas decomposition catalyst) is passed through a filter that is not removed in the first reaction, and the remaining harmful gas is decomposed / treated as quickly as possible, leading to clean air, and ozone used in the first reaction. It did not react with this harmful gas or passed through a filter containing secondary gas decomposition catalyst. In order to effectively decompose and remove the residuals, the air purifier is capable of supplying clean air free of harmful gases, ozone and odors by decomposing and removing ozone through a filter containing an ozone decomposition catalyst. The purpose is to implement In addition, the present invention by using the harmful gas detection sensor to detect the state before the air is purified and the degree of contamination of the air after purification through the purification process to detect whether or not the decomposition ability of the harmful gas decomposition catalyst material has been displayed and displayed this Displayed on the panel as a letter to allow users to exchange harmful gas decomposition catalyst materials when necessary, and to display the current air pollution status and the concentration of harmful gases so that they can respond appropriately to safer and cleaner air. And another object of the present invention is to provide an air purifying apparatus for supplying a general household.

The present invention is to increase the interest in environmental pollution and various side effects accompanying environmental pollution occurs in industrial sites and homes, such as sulfur oxides (SOx), nitrogen oxides that are harmful to humans in the air to solve this problem (NOx), volatile organic compounds (VOCs), and odors, etc., by using ozone and harmful gas decomposition catalyst material to quickly remove the device to provide a cleaner air. Looking at the construction means according to the present invention in more detail, the suction fan is installed in the industrial site or other places where harmful gases are present is located in the lower portion of the device to suck the air containing the various harmful gases into the device, An ozone generator for generating ozone that primarily decomposes harmful gas introduced into the apparatus by the suction fan (3 in FIG. 2) is located above the suction fan. The ozone generator is applicable to the photochemical reaction method using the silent discharge method or ultraviolet lamp which is most used in the industrial field. The silent discharge method is the most commonly used method in industrial sites. The high voltage electrode is installed inside the discharge tube made of glass or ceramic material, and the part contacted with the coolant outside the tube becomes the ground electrode, and when the high voltage exchange of 6000 V is applied, the insulator is insulated. Corona discharge is generated between the ground electrode and the ground electrode and ozone is generated when oxygen or air is introduced in this interval. The photochemical reaction method is the same as the method of generating ozone in the stratosphere, and when ozone is irradiated with ultraviolet rays of 175 to 255 nm, the dissociated oxygen atoms and oxygen molecules react to generate ozone. The photochemical reaction method is advantageous for the production of a small amount of ozone, and the silent discharge method is advantageous when a large amount of ozone is generated. In the present invention, considering the size of the space for air purification, the photochemical reaction method can be applied in the case of a small space, and the ozone generator of the silent discharge method can be installed in the larger space.

Ozone generated in the ozone generator (2 in FIG. 2) has a sterilizing power and an oxidizing power of six times that of chlorine used for tap water sterilization, and can easily process bacteria, viruses, etc. present in the air. In general, UV sterilization is the most widely used method of air sterilization. However, since the ultraviolet sterilization method has a sterilizing effect only within the effective range reached by the ultraviolet light, the sterilizing effect is relatively low compared to ozone because the application range is limited. Generally, more than 90% of food spoilage and alteration in food manufacturing processes are caused by airborne bacteria and falling bacteria. In this case, when 1.2 ppm of ozone is added to the manufacturing process, 62% of the airborne bacteria in the food processing plant are sterilized / treated within 5 minutes, and more than 86% of the bactericidal effect is obtained within 30 minutes. In addition, ozone has an excellent odor removal effect. In the case of hydrogen sulfide (H ₂ S), a major component of the odor, it is completely harmless through the following reaction.

6H ₂ S + ₂ O ₃ ---> 6H ₂ O + ₃ S ₂ (1)

In the case of methane gas also reacts with ozone and is completely harmless.

2CH ₄ + 4O ₃ ---> 3CO ₂ + 6H ₂ (2)

Sulfur-based odors, such as H ₂ S and CH ₃ SH, which are mainly produced in paper mills and pulp mills, can be treated at 90% or more with a contact time of about 8 seconds with 10-15 ppm ozone. Benzene components generated in the paint manufacturing plant is 7 to 10 ppm and 90% or more can be easily processed. Alcohols can be treated with 3 to 10 ppm of ozone.

In the present invention, the first harmful gas is removed by ozone generated in the ozone generator (2), and in the next step, the harmful gas decomposition catalyst material is included while the maximum contact area and time between the ozone and the harmful gas are maximized. The contact area is enlarged and harmful gas is passed through a filter containing a decomposition catalyst to remove harmful gas more quickly. The contact area enlargement and noxious gas decomposition catalyst according to the present invention is prepared by adding nitrate, sulfate or chloride to any one or more metals selected from iron, copper, zinc, silver, chromium, lanthanum, cerium and neodium in an aqueous potassium permanganate solution. An aqueous solution may be obtained by impregnating any of the carriers selected from activated carbon, activated alumina, zeolite, diatomaceous earth, and cordial honeycomb, separating the impregnated carrier from the aqueous solution and drying the calcined carrier. It is prepared by the method of forming as many fine pores as possible to induce contact between the gas and the gas as much as possible in the process, it is produced by forming a diameter of 3 mm to 5 mm below 150 ° C. The contact area enlargement and harmful gas decomposition catalysts prepared as described above are manufactured as a filter by being embedded in boxes made in various shapes and sizes while freeing the flow of air, and are inhaled by the ozone generated from the ozone generator and the suction fan. Gases pass through the fine space of the manufactured filter to have more contact area and contact time, so that harmful gases are decomposed / treated relatively quickly and completely, and the filter contains a harmful gas decomposition catalyst and thus various harmful gases. Easily decomposes and removes the ethylene gas and to perform the role. The contact area enlargement and harmful gas decomposition catalyst (1 in FIG. 2) forms as many fine spaces as possible in the manufacturing process, and the formed narrow spaces may come in contact with an opportunity to react by contacting ozone and harmful gases as much as possible. Increase time The contact area enlargement and harmful gas decomposition catalysts have a slightly different type of decomposition gas and decomposition ability depending on the type of metal or salt component added to the aqueous potassium permanganate solution in the manufacturing process, and thus various types of harmful gas decomposition are used. The catalyst can be prepared, and it can be used to prepare different harmful gas decomposition catalyst materials according to the working environment (type of harmful gas discharged) or to mix them with each other to form a filter. The contact area expansion and harmful gas decomposition catalyst material may decompose and treat various kinds of harmful gases decomposed by ozone, as well as decompose and process ethylene, bacteria and mold.

The present invention is to remove the ethylene gas through the following reaction.

3CH ₂ CH ₂ + 2KMnO ₄ + H ₂ O-> 2MnO ₂ + 3CH ₃ CHO + 2KOH (3)

3CH ₂ CH ₂ + 2KMnO ₄ + H ₂ O-> 3CH ₃ COOH + 2MnO ₂ + 2KOH (4)

_{3CH 3 COOH + 8KMnO 4 ->} 6CO 2 + 8MnO 2 + 8KOH + 2H 2 O (5)

Summarizing the reaction formulas (3)-(5) into one reaction formula

3CH ₂ CH ₂ + 12KMnO _4- > 12MnO ₂ + 12KOH + 6CO ₂ (6)

Potassium permanganate oxidizes ethylene gas by the method described above. As shown in Scheme (3), ethylene gas is oxidized acetaldehyde at the beginning of the reaction, and acetaldehyde is converted to acetic acid as the reaction proceeds. Scheme (4). Acetic acid reacts with potassium permanganate and finally decomposes into carbon dioxide and water. In total, ethylene gas reacts with potassium permanganate and is removed by chemical reactions in the form of carbon dioxide and potassium hydroxide.

In addition, acetic acid, an intermediate product during the reaction, is reacted with potassium hydroxide and neutralized with potassium acetate salt (KCOOCH ₃ ).

CH ₃ COOH + KOH-> KCOOCH ₂ + H ₂ O (7)

The contact area enlargement and harmful gas decomposition catalyst is composed of small grains, so the air flow cannot be made smoothly according to the thickness of the layer or the stacking method. Therefore, the contact area between the harmful gas containing air and the harmful gas decomposition catalyst material is maximized. It shall be made of a filter having a structure wider to facilitate the flow of air. The structure that maximizes the contact area between the air containing the noxious gas and the noxious gas decomposition catalyst material allows the air introduced into the apparatus by the suction fan to flow in as much as possible between the spaces where the noxious gas decomposition catalyst material is stacked. Toxic gas decomposition catalyst materials are stacked vertically (1 in FIG. 2) in various forms (rectangular, square, cylindrical, cylinder, etc.).

In the next step, a filter containing an ozone decomposition catalyst containing air that has passed through the harmful gas decomposition catalyst material as a step of decomposing and treating the remaining harmful human ozone that was previously used as a primary harmful gas remover and failed to react. It passes through and decomposes and removes the remaining ozone. The ozone decomposition catalyst material used in the present invention is manganese oxide, the principle of ozone decomposition by the ozone decomposition catalyst material is decomposed by the following reaction in the presence of a manganese oxide catalyst.

2O₃ + MnO₂ -> 3O₂ + MnO₂                                                                                                                                                       (8)

Air intake fan and air intake fan that are installed in industrial sites, general homes and other places where harmful gases exist in various ways depending on environmental pollution through the above steps The air containing harmful gas inhaled by the ozone is first decomposed / treated by the ozone generated from the ozone generator, such as volatile organic compounds (VOCs), bacteria and odors, and in the next step, the contact area is expanded and harmful. As it passes through a filter containing a gas decomposition catalyst, it decomposes and removes various types of harmful gases, ethylen gas, and bacteria that are not removed from the primary. In the last stage, the ozone used to decompose and treat the harmful gas in the first stage is not completely decomposed and passes through a filter containing an ozone decomposing catalyst to decompose the residual ozone. Implements a device to quickly and cleanly contaminated air.

In order to efficiently perform the above-described operation, the air polluted state (10 in FIG. 2) and the air from the purification process before purifying the noxious gas using a commercially available harmful gas detection sensor (9 and 10 in FIG. 2). By detecting the degree of pollution (9 in Fig. 2), it simultaneously detects whether the current air pollution and the decomposition capacity of the harmful gas decomposition catalyst material are degraded and displays it on the display panel to display the harmful gas decomposition catalyst material if necessary. In exchange, it provides an air purifying apparatus with excellent purifying ability at all times. In addition, the ozone detection sensor monitors the concentration of ozone remaining in the discharged air after passing through a filter containing an ozone decomposition catalyst and displays a message on the display panel so that it can be replaced when the ozone decomposition catalyst is degraded. It is equipped with a function to stop the operation of the ozone generator when the concentration of ozone is more than a certain level while always monitoring the emission of harmful ozone. The apparatus according to the present invention is supplied with power (6 in FIG. 2) for operating the air intake (circulation) fan, ozone generator and electronic circuit, a button for supplying power and a button for operating the apparatus (FIG. 2). 12 and positioned at the same position as the display panel. The apparatus according to the present invention uses signals detected by a detection sensor (ozone, harmful gas detection sensor) to determine the degree of pollution of the current harmful gas, a filter containing a harmful gas decomposition catalyst, and a filter replacement time including an ozone decomposition catalyst. A display panel (12 in FIG. 2, an LCD or an EL or the like) for displaying a is provided. The device according to the present invention has a voice message including a filter containing a harmful gas decomposition catalyst and an exchange time of the filter including an ozone decomposition catalyst, a state of the device, a concentration of a harmful gas and a concentration of ozone, etc. when the user requires it. And a means for selecting a suitable voice message from the voice memory according to the situation and providing a voice notification through a speaker, and a wireless transceiver which is used commercially, and a means for operating the remote controller.

Example 1

Looking at a specific embodiment according to the present invention based on Figure 1,

a) Inhale various harmful gases present in the air into the device using the suction fan (3).

c) The harmful gas introduced by the suction fan is in contact with the filter (1) containing the expansion of the contact area and the harmful gas decomposition catalyst and decomposes and treats the harmful gas.

d) Using the hazardous gas detection sensor (9; after removing the harmful gas, 10; before removing the harmful gas) to increase the contact area and to decompose the decomposition ability of the harmful gas decomposition catalyst material, the timing of replacement and the present harmful The gas concentration and the like are displayed on the display panel 12.

Example 2

Looking at a specific embodiment according to the present invention based on Figure 2,

a) Inhale various harmful gases present in the air into the device using the suction fan (3).

b) Firstly, the harmful gas introduced by the suction fan is decomposed into ozone generated by the ozone generator 2 and treated.

c) By expanding the contact area and contacting the harmful gas decomposition catalyst material (1), the air in which the harmful gas is primarily decomposed / removed by the ozone generator, the harmful gas (sulfite gas, nitrogen oxide), ethylene gas, bacteria and Dissolve and remove odors.

d) Then, using the filter with built-in ozone decomposition catalyst to expand the contact area with ozone generated in the ozone generator and the decomposition / treatment by the filter containing the decomposition gas harmful catalyst to remove harmful gases (sulfite gas, nitrogen oxide) Decompose and process ozone remaining in the air where bacteria and odors are removed.

e) Hazardous gas detection sensors (9; after removal of harmful gases, 10; before removal of hazardous gases) are used to detect degradation of the hazardous gas decomposition catalyst materials, replacement time and current concentration of harmful gases. It is displayed on the display panel 12 or informed by a voice message.

f) The ozone detection sensor 11 is located at the outlet of the apparatus and constantly monitors the ozone concentration after decomposing and treating noxious gas, and stops the operation of the ozone generator when the ozone concentration is above a certain level. In addition, when the ozone concentration is measured and exceeds the set value, the display panel displays a voice message or indicates when to replace the filter containing the ozone decomposition catalyst.

In the present invention, interest in environmental pollution is increasing and various side effects accompanying environmental pollution occur at industrial sites and homes, so that ozone, harmful gas decomposition catalysts and ozone decomposition catalysts are sequentially applied. It has the effect of dissolving and treating various kinds of harmful gases in the field as quickly and cleanly as possible, and also in order to decompose and process the air in which the harmful gases exist as quickly as possible. By designing / manufacturing a structure that forms the contact area of the material as wide as possible, there is an effect of increasing the decomposition efficiency of harmful gases, increasing the treatment capacity and maintaining a low pressure drop. In addition, the ozone generated in the ozone generator is used to decompose harmful gas, and the remaining ozone is contacted with the ozone decomposition catalyst material to completely decompose and process the ozone.

Claims (9)

In the device that decomposes harmful gases in the air, volatile organic compounds (VOCs), bacteria and odors, A suction fan located at the bottom of the device to suck in bacteria, odors and harmful gases present in the air, An ozone generator positioned above the suction fan and configured to generate and spray ozone in order to decompose and treat bacteria, odors and harmful gases in the inhaled air into ozone; At least one of iron, copper, zinc, silver, chromium, lanthanum, cerium and neodium metal in an aqueous potassium permanganate solution in order to decompose and contact with bacteria, odors and harmful gases contained in the air sucked by the suction fan. And a carrier selected from activated carbon, activated alumina, zeolite, diatomaceous earth, and cordial honeycomb in an aqueous solution prepared by adding any one of nitrate, sulfate and chloride to the selected metal, and the impregnated carrier is A filter incorporating a noxious gas decomposition catalyst having an enlarged contact area prepared by separating from an aqueous solution and drying; A filter incorporating an ozone decomposing catalyst made of manganese oxide which decomposes the remaining ozone after decomposing the bacteria, odors and harmful gases in the air generated by the ozone generator; A noxious gas and ozone detection sensor for detecting a lowering of degradation performance of the noxious gas decomposition catalyst, a noxious gas concentration, an ozone concentration, and a lowering degradation performance of the ozone decomposition catalyst; Based on the measured values of the harmful gas and ozone detection sensor, it is determined whether the degradation performance of the harmful gas and the ozone decomposition catalyst is deteriorated, and the filter containing the harmful gas decomposition catalyst having an enlarged contact area and the filter containing the ozone decomposition catalyst are included. Air purification device that decomposes and processes gases harmful to the human body with a display panel that displays the replacement time and the concentration of harmful gases and ozone. delete delete The method according to claim 1, Air purification for decomposing and processing gases harmful to the human body further comprising means for displaying on the display panel or informing a voice message through a speaker when the concentration of the harmful gases and ozone is greater than a predetermined value using the harmful gas and ozone detection sensor. Device. The method according to claim 1, And a device control button operated by an electronic circuit located adjacent to the display panel, or a remote control interoperating with a wireless transceiver. delete delete The method according to claim 1, The structure of the filter containing the harmful gas decomposition catalyst prepared by enlarging the contact area is vertically stacked and the harmful gas is decomposed and removed while lowering the speed of the incoming air by inducing a wide area in contact with the harmful gas between the filters. Air purifier which decomposes and processes harmful gases to the human body, which is designed to quickly decompose and process harmful gases by increasing efficiency. The method according to claim 8, The filter structure for vertically stacking the noxious gas decomposition catalyst is an air purifying apparatus for decomposing and processing gases harmful to the human body composed of any one of a rectangular, square and cylinder type.

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