KR20040032831A - Wet scrubber using ozone and cleaning solution including catalyst material for harmful gas removal - Google Patents

Abstract

PURPOSE: Provided is a wet air purification device, which decomposes and treats various harmful gases present in living environments, such as SOx, NOx and VOCs to produce fresh airs as fast as possible and to remove residual ozone completely. CONSTITUTION: The wet air purification device for decomposing and treating various harmful gases, bacteria and bad odors present in airs by environmental pollutions comprises: a blower fan(5) for introducing air containing various harmful gases into the device; an ozone generator(14) for decomposing and treating the harmful gases with ozone; a storage tank for storing a washing solution(16), to which a harmful gas decomposition catalyzing agent is added, for decomposing/treating the harmful gases by contacting with ozone(15) and decomposing/treating the harmful gases at the same time; a nozzle(13) for spraying the washing solution stored in the tank into the device uniformly; and a washing liquid discharge port.

Description

Wet scrubber using ozone and cleaning solution including catalyst material for harmful gas removal}

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 removing oxides (NOx), volatile organic compounds (VOCs), and odors using a cleaner containing ozone and a harmful gas decomposition catalyst.

In the prior art, two types of dry and wet are mainly used as a method of treating harmful gases in the air, and the dry method is a method of adsorbing harmful gas particles using activated carbon and slaked lime or removing harmful gases by chemical reaction. As a result, there is a problem that the treatment efficiency is relatively low and the maintenance cost is high, and the wet method has a problem that the efficiency of removing the harmful gas is relatively low by cleaning the harmful gas using water and caustic soda. In addition, conventionally, there is no suitable means for indicating the degradation of the ozone decomposition catalyst, the degradation of the harmful gas decomposition catalyst or the present concentration of harmful gases and ozone, so that users are always anxious when using the device. It was not known whether the ozone decomposition catalyst should be replaced, and there was a problem in that it was not possible to adequately cope with the air pollution in the workplace and general households (ventilation, etc.).

The technical problem to be achieved by the present invention is to recognize the problems of the prior art as described above, human harmful sulfur oxides (SOx), nitrogen oxides (NOx), volatile organic compounds (VOCs) and odor generated in the industrial field Various kinds of harmful gases such as human body are sucked into the device by suction fan and reacted with cleaning liquid containing ozone generated from ozone generator and harmful gas decomposition catalyst to decompose / process as soon as possible, and ozone generated from ozone generator is harmful. In order to effectively decompose and remain when it is not completely removed because it does not react with gas and other gases, it rapidly reacts with the ozone decomposition catalyst material to remove the remaining ozone to quickly decompose harmful gases, bacteria, ozone and odors. To remove / supply clean air to the workplace or where it is needed The purpose is to implement. In addition, the present invention always detects the state before purification of the polluted air and the state after purification through the purification process using a commercial hazardous gas detection sensor so that users can always know whether or not degradation of the harmful gas decomposition ability of the device. Another object of the present invention is to display a display panel and to display the current concentration of harmful gas in the air so as to cope with it, thereby providing a device that can provide an environment in which workers or users can work or operate in peace. In the present invention, when the ozone detection sensor is attached to one side of the outlet to decompose harmful gas using ozone generated from the ozone generator, the human body is always checked whether ozone is present in the air from the filter through the filter containing the ozone decomposition catalyst. Another object is to implement a device that informs workers or users that no harmful ozone remains and provides an environment where they can work or work with confidence.

1 is a schematic diagram of a wet air purifier using the cleaning liquid according to the present invention.

2 is a schematic diagram of a wet air purifier using ozone and a cleaning liquid according to the present invention.

3 is a schematic diagram of a wet air purifying apparatus using a cleaning solution storage tank containing a cleaning solution according to the present invention.

4 is a schematic diagram of a wet air purifying apparatus using a cleaning solution storage tank containing ozone and a cleaning solution according to the present invention.

<Short description of drawing number>

One ; Outlet 2; Ozone Decomposition Catalyst

3, 12; Hazardous gas sensor 4; Operation Buttons and Display Panel

5; Blowing fan (suction fan) 6; Hazardous Gas Intake (Inlet)

7; Turbidity sensor 8; Power supply terminal

9; Means of movement of the device (wheels) 10; Cleaning liquid pump

11,19; Valve 13; Nozzle

14; Ozone generator 15; Ozone detection sensor

16; Washing liquid 17; Cleaning solution storage tank

18; Cleaning liquid outlet after use

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. Oxygen (NOx), volatile organic compounds (VOCs), and odors are rapidly decomposed and treated with a cleaner containing ozone generated from ozone generator and a harmful gas decomposition catalyst to supply cleaner air to workers or the general public. Relates to a device. Looking more specifically at the constituent means according to the invention, the suction fan or blowing fan (5) installed in the industrial site or other places where harmful gases are present to suck various harmful gases contained in the air into the apparatus of the apparatus Located in the lower portion, the ozone generator 14 for generating ozone for decomposing / treating the harmful gas in the air introduced by the suction fan 5 is located adjacent to the blowing fan to be injected by the blowing fan And harmful gases in the ozone generator are forcibly injected into the apparatus together, and the ozone and the harmful gases in the air are contacted with each other to be decomposed and removed. At this time, the direction of the wind injected by the blowing fan is controlled by variously changing by the direction key installed adjacent to the ozone generator to induce the cleaners, including harmful gases, ozone and harmful gas decomposition catalysts to collide as much as possible, If the blower fan is not running, the ozone generator must be automatically stopped to prevent ozone from leaking into the air. 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 the industrial field. The high voltage electrode is installed inside the discharge tube made of glass or ceramic material, and the contact portion of the cooling water outside the tube becomes the ground electrode. When applied, a corona discharge occurs between the insulator and the ground electrode, and when oxygen or air is introduced in this interval, ozone is generated. 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, in consideration of the size of the space for air purification, the photochemical reaction method may be applied to a small space, and a larger space may be equipped with an ozone generator of a silent discharge method.

The ozone generated by the ozone generator (14 in FIG. 2) has six times the sterilizing power and the oxidizing power as compared to the 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 lower than that of ozone since 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 about 1.2 ppm of ozone is added to the manufacturing process, about 62% of the airborne bacteria in the food processing plant are sterilized / treated within 5 minutes, and show more than 86% of the sterilization effect within 30 minutes. In addition, ozone has an excellent odor removal effect. In the case of hydrogen sulfide (H ₂ S), which is a major component of odor, it is completely harmless through the following reaction.

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

Methane gas is also completely reacted with ozone.

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 accordance with the present invention, by removing the harmful gas with ozone generated in the ozone generator 14, at the same time using a motor pump for the cleaning liquid 16 containing the harmful gas decomposition catalyst material pump or cleaning the mixed liquid with the harmful gas decomposition catalyst It uses gravity to spray the inside of the device evenly through the nozzle attached to the top of the device to induce as many collisions with harmful gases contained in the air as possible and remove them more quickly.

The harmful gas decomposition catalyst material (16 in FIG. 1) mixed in the cleaning solution according to the present invention is potassium permanganate, which chemically decomposes and removes various harmful gases and ethylene gas contained in the air, and decomposes and removes bacteria and molds. do.

Potassium permanganate contained in the cleaning liquid according to the present invention and ethylene gas present in the air are decomposed and removed 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 to acetaldehyde at the beginning of the reaction, and as the reaction proceeds, acetaldehyde is converted to acetic acid (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 in the course of the reaction, is reacted with potassium hydroxide and neutralized with potassium acet salt (KCOOCH ₃ ).

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

As described above, various types of harmful gases present in the air are decomposed and removed using a cleaning agent mixed with ozone and a harmful gas decomposition catalyst.

The next step is to decompose and remove any remaining ozone previously used as a primary toxic gas remover and not reacting. As the ozone decomposition catalyst material used in the present invention, manganese oxide was used, and ozone was decomposed by the following reaction in the presence of a manganese oxide catalyst.

2O ₃ + MnO _2- > 3O ₂ + MnO ₂ (8)

The ozone decomposition catalyst according to the present invention contains manganese nitrate as a main component, and as an ingredient, one or more of vanadium oxide, copper oxide, silver oxide, cerium oxide, and lanthanum oxide is added to support activated carbon and silica, alumina, and zeolite, and this is 150 ° C. It is dried below to form a small solid mass (about 3 to 5 mm in diameter). The ozone decomposing catalyst formed into the small solid mass is formed in a box in various shapes and sizes to free the flow of air to form a filter. The filter containing the ozone decomposition catalyst is installed at the last stage of the air purifying apparatus according to the present invention in order to decompose the ozone in case it is not completely decomposed.

In order to efficiently perform the above-mentioned action, the harmful gas detection sensors 3 and 12 used commercially always detect the state (3) before purifying the noxious gas and the state (12) of the air that has been purified. Detects the degradation of the harmful gas decomposition catalyst mixed in the cleaning liquid and displays it on the display panel so that the user can exchange the cleaning liquid if necessary, and displays the current concentration of harmful gas on the display panel so that workers or users can Properly respond to the problem (ventilation, etc.). In case of using ozone generator, it always checks whether there is ozone in the air through the ozone decomposition catalyst and stops the operation of ozone generator when ozone is over a certain amount to prevent the harmful ozone from leaking out of the device. In addition, the ozone concentration measured by the ozone sensor can be checked through the display panel. A commercially available turbidity sensor (7) that can detect the degree of contamination of a cleaning agent that can be easily contaminated by organic matter or fine dust contained in the air is installed inside the cleaning agent and indicates the timing of replacement of the cleaning liquid by displaying the degree of contamination of the cleaning agent. . In addition, the present invention is installed in the cleaning liquid storage tank storing the cleaning liquid at a position higher than the nozzle to spray the cleaning liquid evenly inside the air purifier through the valve and the nozzle using gravity without using the electric motor for pumping and to clean the air It can also be achieved by the structure (FIG. 3, FIG. 4) which sends the used washing | cleaning liquid to a wastewater treatment apparatus. The apparatus according to the present invention is supplied with a power supply 6 for operating the air blowing fan, the ozone generator and the electronic circuit, and has a button for supplying power and buttons with various functions for controlling the device. Doing. By using the signal detected by the detection sensor (ozone and harmful gas detection sensor) to display the concentration of the harmful gas present in the atmosphere, the cleaning liquid mixed with the harmful gas decomposition catalyst and the replacement time of the filter containing the ozone decomposition catalyst, etc. The display panel 4, LCD, EL, etc. are provided. In addition, when the user needs, various kinds of voice messages are provided for the timing of exchange of ozone decomposition catalyst and detergent, the condition of the device, the concentration of harmful gas and ozone, etc. Using means can provide a means for notifying the voice through the speaker, it can be provided with a commercial radio transceiver and a means for operating by a remote control.

Example 1

Looking at a specific embodiment of the wet air purifying apparatus according to the present invention based on Figure 1,

First, in the case of FIG.

a) The blowing fan 5 forcibly injects air containing various harmful gases into the apparatus. At this time, the direction in which air is injected is fixed by using a direction key so that the cleaning liquid and the injected air can induce as much collision (contact) as possible.

b) The cleaning liquid mixed with the noxious gas decomposition catalyst is evenly sprayed into the apparatus through the nozzle 13 using the motor pump 10.

c) Check the harmful gas decomposing ability of the cleaning agent by measuring the concentration of harmful gas after the purification process and before the purification process using commercially available harmful gas detection sensors, and always display or display the current harmful gas concentration. Provide means to inform.

Example 2

In the case of Figure 2

a) The blowing fan 5 forcibly injects air containing various harmful gases into the apparatus. At this time, the direction in which air is injected is fixed by using a direction key so that the cleaning liquid and the injected air can induce as much collision (contact) as possible.

b) Ozone generated from the ozone generator located in front of the blower is injected into the apparatus together with the air containing harmful gas as the blowing power of the blowing.

c) Spray the cleaning liquid mixed with the noxious gas decomposition catalyst evenly into the inside of the apparatus through the nozzle 13 using the motor pump 10.

d) Induce harmful gases, ozone and cleaning liquids injected into the apparatus to collide with each other as much as possible to quickly decompose and remove harmful gases.

e) Ozone generated in the ozone generator and not decomposed and removed is decomposed and removed in the last step using a filter containing an ozone decomposition catalyst.

f) Using a commercially available hazardous gas detection sensor, the concentration of hazardous gases is measured after the purification process and before the purification process to check the decomposition ability of the hazardous gases and to display the current hazardous gas concentration at all times. It is equipped with a means to give a voice or inform it.The ozone detection sensor is used to measure the concentration of ozone, display it on the display panel, and respond to it. Prevent it.

[ Embodiment 3 ] and [ Embodiment 4 ] in the first and second embodiments, injecting the cleaning liquid into the air purifier through the nozzle, do not use an electric motor pump, but use gravity to supply the cleaning liquid storage tank. Consists of evenly spraying the cleaning liquid contained in the apparatus using a valve and a nozzle, shown in Figures 3 and 4. The number of nozzles and the injection amount of the cleaning liquid in the first, second, third and fourth embodiments May vary depending on the size and capacity of the air purifier.

In the present invention, there is a growing interest in environmental pollution and various side effects associated with environmental pollution occur in industrial sites and homes, so that it is sprayed with a cleaning liquid mixed with ozone and harmful gas decomposition catalysts to decompose / process and discharge to the exhaust air. By removing the remaining ozone with a filter containing an ozone decomposition catalyst, it has the effect of providing fresh air as quickly as possible by quickly decomposing and treating various kinds of harmful gases present in the living site. In addition, the present invention is to remove the ozone harmful to people by completely decomposing the residual ozone in the exhaust gas by using a filter containing an ozone decomposition catalyst in case the ozone used to decompose the harmful gas remains. It works.

The present invention is equipped with a harmful gas and ozone detection sensor and has a means for measuring and displaying the concentration of harmful gases and ozone in the air at all times, when the ozone harmful to the human body is leaked to the outside by stopping the operation of the ozone generator ozone It prevents the outflow of the outside, and if the concentration of the harmful gas is above a certain value by sending a warning message, there is an effect that can act to respond to the ventilation and evacuation.

Claims (9)

In the device for wet decomposition and processing of various gases, bacteria and odors harmful to the human body in the air by environmental pollution, A blowing fan for injecting air containing various harmful gases into the apparatus, A tank storing a cleaning liquid containing a harmful gas decomposition catalyst capable of decomposing and treating harmful gases contained in the air injected by the blower fan; A nozzle for evenly spraying the cleaning solution stored in the tank into the apparatus; Toxic gas detection sensors for detecting the state before and after decomposing and treating the harmful gas in the air with the cleaning liquid sprayed by the nozzle, And a display means for displaying a current harmful gas concentration and a replacement time of the cleaning liquid using a value detected by the harmful gas detection sensor. The method according to claim 1, The means for injecting the cleaning liquid mixed with the harmful gas decomposition catalyst through the nozzle is provided with a means for evenly spraying the cleaning liquid inside the apparatus by gravity using an electric motor pump or by installing the cleaning liquid storage tank in a place higher than the air purifier. Wet Air Purifier. The method according to claim 1 or 2, The cleaning liquid mixed with the harmful gas decomposition catalyst is a wet air purification device consisting of an aqueous solution in which potassium permanganate is dissolved. In the device for wet decomposition and processing of various gases, bacteria and odors harmful to the human body in the air by environmental pollution, A blowing fan for injecting air containing various harmful gases into the apparatus, An ozone generator for generating ozone in order to decompose and treat the harmful gas introduced by the blowing fan into ozone; A tank storing a cleaning liquid containing a harmful gas decomposition catalyst capable of decomposing / treating the harmful gas while contacting and decomposing / treating the harmful gas contained in the air with ozone injected by the blowing fan; A nozzle for evenly spraying the stored cleaning liquid of the tank into the apparatus; A wet air purifier having a cleaning liquid outlet for discharging the cleaning liquid after use. The method according to claim 4, Wet air further comprising a filter containing an ozone decomposing catalyst for decomposing and removing ozone remaining in the exhausted air after decomposing and removing the harmful gas in the air with a cleaning liquid including ozone generated from the ozone generator and a harmful gas decomposition catalyst. Purifier. The method according to claim 5, And a ozone detection sensor further configured to detect whether ozone generated in the ozone generator is discharged by remaining in the exhaust gas without being removed through a filter containing an ozone decomposition catalyst. The method according to claim 6, The value measured by the ozone detecting sensor is used to determine the current ozone concentration in the air and the degree of deterioration of the ozone decomposing ability of the filter containing the ozone decomposing catalyst to display the filter replacement time on the display panel or to generate a voice message Wet air purification device further comprising a means to inform through. The method according to any one of claims 4 to 7, The ozone decomposition catalyst is composed of manganese oxide as a main component, and a wet air purifier made by adding one or more of vanadium oxide, copper oxide, silver oxide, cerium oxide, and lanthanum oxide to be supported on activated carbon, silica, alumina, and zeolite and dried. . The method according to claim 8, Located in the front side of the blowing fan or ozone generator wet air purifier further comprises a direction key for changing the direction of the wind injected into the device.