KR101237817B1 - Apparatus for cleaning toxic and odor gas using neutralization reaction between gas and gas - Google Patents

Abstract

PURPOSE: An apparatus for purifying toxic gas and odor by neutralization of gases is provides to minimize by-product and secondary toxic material generation. CONSTITUTION: An apparatus for purifying toxic gas and odor comprises a main spray unit(200), a reaction unit(300), and an auxiliary spay unit. An ultrasonic atomizer is mounted at the main spray unit to neutralize a first material of toxic gas and odor. The reaction unit purifies and releases the harmful gas and odor through plasma. The auxiliary spray unit is formed between the main spray unit and reaction unit. [Reference numerals] (AA) Exhaustion gas

Description

Noxious gas and odor gas purification device using neutralization reaction between gases {APPARATUS FOR CLEANING TOXIC AND ODOR GAS USING NEUTRALIZATION REACTION BETWEEN GAS AND GAS}

The present invention relates to a harmful gas and odor gas purification device, more specifically, neutralization reaction between the gas to remove harmful substances of acid and base components by spraying the gas on the harmful gas and odor gas containing harmful substances of acid and base components It relates to a harmful gas and odor gas purification apparatus using.

Exhaust gases from various factories include various toxic chemicals such as volatile organic compounds (VOCs) and odorous gases, which are major sources of air pollution. The volatile organic compounds may be of various kinds, but aromatic compounds such as benzene and phenol, hydrocarbon compounds such as alkanes and alkenes, and halogens such as chlorine. Heterogeneous hydrocarbons, including compounds, nitrogen, oxygen, and the like. The main sources of volatile organic compounds include paint, paint and plastics factories, chemical plants, oil refineries, reservoirs and laundries.

These volatile organic compounds cause tropospheric ozone pollution, stratospheric ozone depletion and global warming depending on the type and type of reaction in the atmosphere.In the short term, when humans and animals are exposed to volatile organic compounds, respiratory diseases, neurological disorders, etc. It is reported that in the long term it can cause carcinogenesis, genetic variation and the like. As such, the emissions of volatile organic compounds, which are very harmful to health by themselves, are increasing every year due to the development of the industry, and the environmental pollution is further increased accordingly.

On the other hand, odor is mainly caused by air pollution and stimulates the sense of smell. The odor causing substances include aldehydes, indole, ketones, alcohols, phenols, chlorine compounds, carbon disulfide, ammonia and organic acids in addition to hydrogen sulfide, mercaptans and amines. Around rubber manufacturing plant, chemical manufacturing plant, plastic manufacturing plant, food manufacturing plant, fertilizer plant, paper mill, etc., where the odorous substances are made or where agricultural and livestock industry takes place, sewage treatment plant, manure treatment plant, crematorium, garbage landfill Even in a large amount of odor is generated.

When a person smells bad, mental stress builds up and becomes psychologically disturbing, sometimes accompanied by irritation, hysteria and insomnia. Physiologically, symptoms such as an increase in blood pressure due to odor, abnormality of the reproductive system due to hormonal secretion change, olfactory deterioration, headache and vomiting may occur.

Conventional regenerative thermal oxidation (RTO) devices, regenerative catalytic oxidation (RCO) devices, adsorption treatment devices, or the like for direct removal of toxic chemical gases and odorous substances Biofilters were mainly used.

The RTO apparatus is a method of recovering and reusing combustion heat after directly oxidizing and treating an exhaust gas, and thus has high treatment efficiency and is economical in treating high concentrations of volatile organic compounds. However, if the equipment cost is excessive and the concentration of volatile organic compounds is low, it is not economical because of high operating costs, and it is not suitable for the treatment of volatile organic compounds containing severe fluctuations in exhaust gas or containing halogen and sulfur compounds, and it is restricted in the installation place. This follows.

The RCO apparatus burns and activates a catalyst, reacts with the exhaust gas, and treats the combustion heat to recover and reuse heat. Thus, the RCO device has a low operating cost, low generation of nitrogen compounds (NOx), and small size. However, the facility cost is higher than that of the RTO device, the scope of application is limited according to the generation of treatment targets, and the flow rate is not suitable for treating volatile organic compounds at high concentrations, and the catalyst must be replaced periodically.

On the other hand, the adsorption treatment apparatus treats the exhaust gas by contacting the solid adsorbent to collect, collect and retain the volatile organic compounds on the surface of the adsorbent, and regenerates the adsorbent by desorption using a thermal cycle. This is advantageous in that the removal efficiency of volatile organic compounds is high and the fuel cost is low. However, a pretreatment facility that needs to filter the particulate matter contained in the exhaust gas is required in advance, and wastewater is generated when the adsorbent is regenerated. There is this.

In addition, biofilters are difficult to use in the case of materials that are not biologically decomposed. In the case of installing such a biofilter, it takes a long time to react biologically, occupies a lot of sites, it is difficult to maintain and manage the activity of microorganisms, and in particular, it is sensitive to temperature, so it is low in winter and difficult to operate. .

Furthermore, the method of removing contaminants using the plasma treatment process is widely used. However, since the pollutants in the form of extremely small particulates are very small in size, they are not removed even by plasma treatment. In order to solve this problem, recently, a technique has been developed in which small particles are sprayed by atomizing water to contaminants in the form of coarse particles to coarse fine particles and then electrostatically collect them. However, since water has polarity, it can coarsen only to pollutants having polarity, and thus, it is difficult to remove pollutants having nonpolarity. In addition, when the coarsening is generated by a certain level or more by water is generated by-products that fall free, there is a problem in that separate costs are generated in processing the by-products.

Therefore, there is a demand for the development of an efficient and economical method for removing substances that are harmful to the human body and cause odors and environmental pollution but are not processed by the general pollutant removal process.

Republic of Korea Patent No. 10-0817303 (announced on March 27, 2008) Republic of Korea Patent No. 10-0737941 (2007.07.13 announcement) Republic of Korea Patent No. 10-0929905 (announced June 15, 2009)

Therefore, an object of the present invention by supplying a gas having a property opposite to the harmful substances and odorous substances contained in the toxic gas and odorous gas to neutralize the harmful and odorous substances to the harmful and odorous substances An object of the present invention is to provide a toxic gas and odor gas purification device using a neutralization reaction between gases that provides excellent and stable treatment efficiency.

In order to achieve the above object of the present invention, in one embodiment of the present invention, in the harmful gas and odor gas purification device, neutralizing the first material to neutralize the first material of the harmful gas and odor gas Noxious gas and odor using a neutralization reaction between gases including a main spraying unit provided with an ultrasonic sprayer spraying a second substance in a gaseous state, and a reaction unit for purifying and discharging the noxious gas and odor gas passing through the main spraying unit through plasma Provide a gas purifier.

According to the present invention, the detoxification treatment for odors emitted from various industrial processes and living environments can be reliably performed, and generation of secondary toxic substances such as ozone or CO can be minimized.

In addition, the present invention does not require a large installation space because the size is smaller than the purification device using the RTO, the purification device using a scrubber, the purification device using a biofilter, it is excellent in space utilization.

In addition, the present invention purifies the harmful chemicals by using gaseous acid and alkali components, thereby minimizing the generation of by-products, and thus lowering the overall operating cost since the cost of post-treatment of the by-products is lowered.

In addition, the present invention, because the overall configuration is simplified, as well as the production cost is reduced compared to the conventional purification device, such as a purification device using a RTO, a purification device using a scrubber, it is easy to operate.

1 is a configuration diagram for schematically explaining a harmful gas and odor gas purification apparatus according to an embodiment of the present invention.
Figure 2 is a block diagram for explaining the harmful gas and odor gas purification apparatus according to an embodiment of the present invention.
Figure 3 is a block diagram illustrating the electrical connection of the noxious gas and odor gas purification apparatus according to the present invention.
Figure 4 is a block diagram for explaining the harmful gas and odor gas purification apparatus according to another embodiment of the present invention.

Hereinafter, referring to the accompanying drawings, in order to remove harmful substances and odorous substances included in harmful gases according to preferred embodiments of the present invention, a harmful gas and odor gas purification apparatus using neutralization reaction between gases (hereinafter, 'toxic gas purification Device ') will be described in detail.

1 is a block diagram for schematically explaining a harmful gas purification apparatus according to an embodiment of the present invention, Figure 2 is a block diagram for explaining an embodiment of the harmful gas purification apparatus according to the present invention.

1 and 2, the apparatus for purifying harmful gas according to an embodiment of the present invention may neutralize the first material included in the noxious gas and the odor gas (hereinafter, referred to as 'harmful gas'). The main spraying unit 200 is provided with an ultrasonic atomizer for spraying a second substance opposed to the first substance in a gaseous state, and the reaction unit 300 for purifying the gas passing through the main spraying unit 200 through a plasma to be discharged. Include.

If necessary, the suction unit for inhaling and supplying harmful gas to the main spraying unit, a sensor unit for sensing information on the gas to operate only when noxious gas is generated, and the information inputted from the sensor unit It may further include a control board for controlling the operation of.

Hereinafter, each component will be described in more detail with reference to the drawings.

Referring to Figure 1, the harmful gas purifying apparatus according to an embodiment of the present invention includes a main spraying unit (200).

The main spraying unit 200 has ultrasonic sprayers 210 'and 210 "for spraying a second substance in a gas state on one side thereof, and sprays the second substance in a gaseous state to the harmful gas introduced through the suction unit. It is a device that allows mixing.

At this time, since both the noxious gas and the second substance are gases, a gas reaction occurs between the noxious gas and the second substance. In addition, since the second substance is composed of a substance that neutralizes the first substance of the noxious gas, a neutralization reaction occurs between the first substance and the second substance.

For example, when the first substance is an acidic substance, it is preferable to use a basic solution for neutralizing the acidic substance as the second substance. In addition, when the first substance is a basic substance, it is preferable to use an acid solution that neutralizes the basic substance as the second substance.

Specifically, when the first material is ammonia, a 1 mol% solution of HNO ₃ may be used as the second material. In addition, when the first material is hydrogen sulfide, a 1 mol% solution of NaOH may be used as the second material.

However, since the first substance included in the noxious gas is mostly composed of acidic substances, it is preferable to use an alkali solution of 0.01 to 1 mol% for the general purpose use as the second substance. As such an alkaline solution, an aqueous sodium hydroxide (NaOH) solution, an aqueous potassium hydroxide (KOH) solution, an aqueous calcium hydroxide (Ca (OH) ₂ ) solution, an aqueous ammonia (NH ₄ OH) solution, or the like may be used, but is not limited thereto.

As a result, a solid is produced through the neutralization reaction of the first material and the second material, and the solid is supplied to the reaction part and treated like a noxious gas.

On the other hand, the main spraying unit 200 according to the present invention uses an ultrasonic atomizer as a spray device for spraying the second material in a gaseous state. In general, a heater using a principle of heating and evaporating a liquid may be used as an apparatus capable of phase changing a liquid into a gas.

However, since the second material is not only composed of water but also further includes an acidic substance or a basic substance, the use of a heater may reduce the occurrence of neutralization reaction between gases. In other words, since acidic substances or basic substances added to water have different boiling points from water, when the second substance is evaporated with a heater, only water is evaporated and acidic or basic components are not evaporated, and a neutralization reaction may not occur. .

In addition, although an ordinary nebulizer may be used instead of the ultrasonic nebulizer of the present invention, since the nebulizer has a larger particle size of the second material to be sprayed than the ultrasonic nebulizer, the gas reaction between the first material and the second material is reduced overall. . In other words, at the same amount, increasing the degree of saturation by making the particles of the second material small show excellent performance.

That is, in order to generate the same level of neutralization reaction as the ultrasonic nebulizer using the nebulizer, a larger amount of the second material is required than in the case of using an ultrasonic nebulizer, and the time required for the neutralization reaction to be increased is increased. The required temperature is high.

In addition, when the usage amount of the second material is increased, the operating cost required for purifying the noxious gas is increased. In addition, the coagulation phenomenon occurs before being supplied to the reaction unit, so that by-products that fall freely to the bottom are generated, thereby causing a problem of treating the by-products separately.

In addition, when the time required for the neutralization reaction to increase is increased, the size of the overall purifier is large because the size of the space for reacting the first material and the second material, for example, the main spraying part 200, must be increased before it is supplied to the reaction part. You lose. That is, in order to use the nebulizer for spraying the second substance on the reaction part 300, a larger installation space is required than when using the ultrasonic nebulizer.

On the other hand, the second material may include a surfactant for purifying volatile organic compounds (VOCs) contained in the noxious gas.

Figure 3 is a block diagram illustrating the electrical connection of the noxious gas and odor gas purification apparatus according to the present invention.

1 and 3, the main spraying unit according to the present invention is a spray chamber (not shown) that provides a space for contacting the first substance contained in the noxious gas and the gaseous second substance, and the acidic solution is stored A first storage chamber (not shown), a second storage chamber (not shown) in which a basic solution is stored, a first ultrasonic atomizer 210 'and a second ultrasonic wave installed at one side of the spray chamber to spray a second material. A first supply pipe connecting the nebulizer 210 ", the first ultrasonic atomizer 210 'and the first storage chamber, and a second supply pipe connecting the second ultrasonic atomizer 210" and the second storage chamber. A configured supply pipe (not shown), and the first supply pipe and the second supply pipe, respectively provided in the outlet and electrically connected to the control board 500, the outflow for opening and closing the supply pipe in accordance with the control signal of the control board 500 Control means 220. Here, as the outflow control means 220, an automatic control valve or a pump can be used.

The main spraying unit 200 may selectively operate different ultrasonic sprayers 210 ′ and 210 ″ according to the type of harmful gas to spray an acidic solution or a basic solution in a gaseous state, thereby minimizing the amount of the second material. In addition, the acidic solution and the basic solution may prevent the problem of being neutralized by contacting each other before being sprayed into the main spraying part 200 because the ultrasonic atomizers 210 'and 210 "to be sprayed are different from each other. .

If necessary, the harmful gas purifying apparatus according to the present invention may be configured such that the second material is stored only in the first storage chamber, and the aqueous solution containing the surfactant is stored in the second storage chamber instead of the second material. These surfactants serve to optimize the decomposition conditions by plasma by separating the VOCs contained in the harmful gas into fine particles by the dispersion and emulsification action.

Here, the surfactant used to separate the VOCs into fine particles has a HLB value in the range of 7 to 11, nonionic surfactant polyethylene glycol (molecular weight 20 to 40), polypropylene glycol (molecular weight 20 to 60) or anionic surfactant Sodium dodecyl sulfonate can be used. In addition, the aqueous solution containing the surfactant is preferably configured by mixing a ratio of 0.01 to 1% by weight of one or two or more kinds of the surfactant with 99 to 99.99% by weight of water. If less than 0.01% by weight of surfactant is used, since the effect of dispersing and emulsifying is low and the natural function of separating VOCs into fine particles is significantly reduced, it is difficult to remove VOCs. On the contrary, when the surfactant is used in an amount exceeding 1% by weight, the specific gravity is high, so there are secondary problems such as dispersion and foaming.

In other words, since the harmful gas may include VOCs in addition to the first substance composed of an acidic substance and a basic substance, in order to smoothly purify both the first substance and the VOCs, the main spraying department may use an aqueous solution containing the second substance and the surfactant. Spray in gaseous state.

As such, the reason for spraying the surfactant and the second substance into the noxious gas without using the second substance to which the surfactant is added is that the acidic substance and the basic substance and the surfactant react before the spraying through the ultrasonic atomizer. While preventing the problem in advance, it is to properly control the amount of the surfactant used. In other words, the residues of the surfactants remaining after treating VOCs have to be purified separately. However, since these surfactants are polymers, biodegradation is difficult and expensive to purify them.

If necessary, a pretreatment unit (not shown) may be provided between the suction unit 100 and the main spraying unit 200.

In the upper part of the pretreatment unit, a plurality of injectors for injecting water to collect harmful gases are installed, and a collecting unit is installed below. The collector has a structure in which a plurality of collectors made of a loofah structure made of Teflon, plastic, or the like are stacked on a pedestal of a grill structure.

In addition, the harmful gas sucked into the suction unit flows into the pretreatment unit and is collected and processed by the collector. The harmful gas collected in the collector is washed by water continuously sprayed from the upper side and stored in the bottom surface of the pretreatment unit.

Referring to Figure 1, the harmful gas purifying apparatus according to an embodiment of the present invention may further include a suction unit (100).

The suction unit 100 is installed around the harmful gas discharge source to suck harmful gas, it may be provided with a blower to suck the harmful gas. At this time, the harmful gas includes a malodor containing odorous substances, and VOCs such as benzene and toluene. Here, the source of noxious gas means the individual facilities such as factories, incinerators, etc. that are likely to emit harmful gases, industrial and industrial complexes where these facilities are dense, or residential areas where there is a possibility of harmful gas entering adjacent to the facility or complex do.

In a particular aspect, the suction unit 100 according to the present invention is a tubular housing (not shown) through which harmful gas passes, and the inlet of the housing through which harmful gas is introduced to introduce the harmful gas into the tubular housing. One or more blowers to be installed, and the filter provided to remove the foreign matter (dust, excess oil, etc.) contained in the harmful gas introduced into the housing so as to be spaced apart at a predetermined interval to the blower.

At this time, as the filter, a pre-filter and a demister may be used, and either the pre-filter or the demister may be positioned at the front end.

Referring to Figure 3, the harmful gas purifying apparatus according to an embodiment of the present invention may further include a sensor unit 400.

The sensor unit 400 is installed around the harmful gas discharge source for discharging the noxious gas, and detects the information on the noxious gas in real time, and transmits the detected information to the control board 500. Here, the sensor unit 400 is composed of one or more sensors 410, 420, 430, each sensor may be installed in two or more harmful gas discharge source of a single harmful gas source or adjacent to each other.

As the sensor unit 400, any sensor may be used as long as it can detect a harmful gas, but it is preferable to use a sensor that can detect generation of hydrogen sulfide, ammonia, VOCs, and the like, which causes odors. . More specifically, the sensor unit 400 may use a semiconductor sensor, an electrochemical sensor, a direct combustion sensor, a UV sensor, an IR sensor, and specifically, may use a TVOC sensor, H ₂ S sensor, and the like. .

Further, in the sensor unit 400, it is preferable to use a sensor that can measure whether or not the generation of harmful gas, the type of harmful gas, the amount of harmful gas. Using such a sensor, the control board 500 can control the flow control means 220 according to the type of harmful gas, the amount of harmful gas, the size of the harmful substance particles to control the opening and closing of the supply pipe, more efficient System operation is possible.

1 and 2, the harmful gas purifying apparatus according to an embodiment of the present invention includes a reaction unit (300).

The reaction unit 300 is connected to the rear end of the main spraying unit 200 to purify and discharge the harmful gas passing through the main spraying unit 200 through a corona discharge, preferably a corona commonly used in the art. It is recommended to use an electric precipitator using discharge.

More specifically, the reaction unit 300 may use an electrostatic precipitator to which a pulsed corona discharge or a dielectric barrier discharge technique is applied to treat harmful gases.

In a particular aspect, the reaction unit 300 according to the present invention includes a housing providing a closed space through which harmful gas passes, a plurality of flat ground electrodes arranged side by side at predetermined intervals in the housing, and A plurality of discharge electrodes arranged between the ground electrodes and high voltage pulse supply means for applying a high voltage pulse to each of the discharge electrodes to generate a plasma by corona discharge between the ground electrodes and the discharge electrodes; It may include.

Referring to Figure 3, the harmful gas purifying apparatus according to an embodiment of the present invention may further include a control board (500).

The control board 500 is electrically connected to the sensor unit 400, the blower 110, the ultrasonic atomizer 210 and the outflow control means 220, the plasma reactor 310, the sensor unit installed in the harmful gas discharge source By using the 400, information on the generation and emission concentration information of the harmful gas, the location information of the sensors constituting the sensor unit 400, information such as whether there is an abnormality of the sensors are collected.

In addition, the control board 500 collects the information provided from the sensor unit 400 and controls the operations of the blower 110, the ultrasonic atomizer 210, the outflow control means 220, and the plasma reactor 310.

Figure 4 is a block diagram for explaining another embodiment of the harmful gas purification apparatus according to the present invention.

Referring to FIG. 4, the apparatus for purifying harmful gas according to another embodiment of the present invention includes a main spray unit 200 for spraying a second substance in a gaseous state on the harmful gas, and a harmful gas passed through the main spray unit 200. Auxiliary spraying unit 250 for spraying the aqueous solution containing the surfactant in the gas state, and the reaction unit 300 for purifying the harmful gas passing through the auxiliary spraying unit 250 through the plasma to discharge. At this time, since the main spraying unit 200 and the reaction unit 300 can determine the configuration through the above description, a more detailed description thereof will be omitted.

4, the harmful gas purifying apparatus according to another embodiment of the present invention includes an auxiliary spraying unit (250).

The auxiliary spraying unit 250 is provided between the main spraying unit 200 and the reaction unit 300, and the main spraying unit 200 interfaces with an internal space, unlike the main spraying unit 200 spraying a second material that neutralizes the first material. Spraying the aqueous solution containing the active agent in a gaseous state serves to separate the VOCs contained in the harmful gas into fine particles with the aqueous solution containing the surfactant. To this end, the auxiliary spraying unit 250 is provided with an ultrasonic atomizer for spraying an aqueous solution containing a surfactant in a gaseous state in the harmful gas passing through the main spraying unit 200.

The auxiliary spraying unit 250 may be replaced with the main spraying unit 200 and the position.

As described above, the harmful gas purifying apparatus according to the present invention has a difference as shown in Table 1 below when compared with a conventional purifying apparatus using RTO, a purifying apparatus using a scrubber, a purifying apparatus using a biofilter.

[Table 1]

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments. In this embodiment, a chemical reaction of hydrogen sulfide, which is a representative malodorous substance, and ammonia gas is induced, and through this, the product is configured as shown in FIG. 5 to remove harmful substances by using corona discharge.

Specifically, hydrogen sulfide (H ₂ S) gas and ammonia (NH ₃ ) gas diluted in air used 10% hydrogen sulfide and 10% ammonia in a nitrogen atmosphere, and the flow rate was controlled using MFC (Mass Flow Controller). The hydrogen sulfide and ammonia can be easily thermochemically chemically reacted at room temperature, can be easily purchased, and has been used because of economical features at low cost.

In addition, the plasma gas directly used hydrogen sulfide and ammonia gas diluted in air, and air was introduced into the plasma reactor using a blower at the rear of the apparatus.

In addition, when hydrogen sulfide gas was injected into the first substance which is a noxious gas, a 1 mol% NaOH solution was used as the second substance to neutralize the first substance, thereby inducing a chemical reaction. In addition, when ammonia gas was injected into the first substance as a noxious gas, a 1 mol% HNO ₃ solution was used as the second substance.

In addition, an electrostatic precipitator using a corona discharge reaction for removing a substance generated through a chemical reaction was used. The interior of the electrostatic precipitator is composed of a pin-shaped discharge electrode and a circular counter electrode (dust collecting pole), and the material is made of stainless steel. The power source used to generate the corona discharge was a high voltage DC power supply and a high voltage (kV), low current (mA) power supply.

The removal efficiency and design factors were calculated using Equation (1).

[Equation 1]

Removal rate (%) =

는 초기 암모니아와 황화수소에 농도(ppm)이며,

는 분해 후 황화수소와 암모니아 농도(ppm)이다.
here,

Is the concentration in ppm of initial ammonia and hydrogen sulfide,

Is the concentration of hydrogen sulfide and ammonia (ppm) after decomposition.

6 is a graph showing the removal efficiency of hydrogen sulfide according to the flow rate, Table 2 is a table showing the removal efficiency of hydrogen sulfide according to the flow rate.

[Table 2]

Specifically, an aqueous solution of 1 mol% sodium hydroxide was vaporized using an ultrasonic atomizer to induce a chemical reaction with hydrogen sulfide.

The experimental results showed that the hydrogen sulfide concentration increased at 500 L / min, resulting in high removal rates of over 99% at 1,000 ppm and 85% at 2,500 ppm.

When the flow rate was 1,000 L / min, the removal rate was higher than 99.9% up to 300 ppm, and the removal rate was rapidly lowered at 400 ppm.

In addition, when the flow rate is 2,000L / min, the removal rate of 98% at 100ppm was shown to decrease sharply as the concentration increases.

Experimental results showed that the flow rate was 2.2m / s at 500L / min, and sufficient residence time and sufficient amount of sodium hydroxide resulted in most reaction with high concentration of hydrogen sulfide.

As the flow rate increased, the flow rate increased to 4.3 m / s at 1,000 L / min, and the removal rate was high up to 300 ppm, but it was lowered at a higher concentration. Therefore, it was judged that the time required for the chemical reaction was insufficient. The same result was confirmed in the result of 2,000 L / min which further increased the flow rate.

7 is a graph showing the removal efficiency of ammonia according to the flow rate, Table 3 is a table showing the removal efficiency of ammonia according to the flow rate.

[Table 3]

Specifically, an aqueous solution of 1 mol% nitric acid was vaporized using an ultrasonic atomizer to induce a chemical reaction with ammonia.

Experimental results showed that the ammonia concentration increased at 500 L / min, resulting in more than 90% removal at 800 ppm and 85% at 1,400 ppm.

And when the flow rate is 1000L / min, the removal rate was shown to be higher than 95% to 440ppm, the removal rate began to decrease at 600ppm.

In addition, when the flow rate is 2,000L / min, it was observed that the removal rate of 90% at 110ppm, but sharply lowered as the concentration increases.

Experimental results showed that the flow rate was 2.2m / s at 500L / min, and sufficient residence time and sufficient amount of nitric acid were considered, and most of the reaction with high concentration of ammonia occurred.

As the flow rate increased, the flow rate increased to 4.3 m / s at 1,000 L / min, and the removal rate was high up to 440 ppm, but it was lowered at higher concentrations. Therefore, it was determined that the time required for the chemical reaction to occur was insufficient. The same result was confirmed in the result of 2,000 L / min which further increased the flow rate.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It can be understood that it is possible.

100: suction 110: blower
200: main spray unit 210: ultrasonic spray
220: outflow control means 250: auxiliary spraying unit
300: reaction unit 310: plasma reactor
400: sensor 500: control board

Claims (9)

In the harmful gas and odor gas purification device,
A main spraying unit provided with an ultrasonic atomizer for spraying a second substance neutralizing the first substance in a gaseous state so as to neutralize the first substance of the noxious gas and the odor gas;
A reaction unit configured to purify the harmful gas and the odor gas passing through the main spray unit through plasma by corona discharge; And
An apparatus for purifying toxic gases and odor gases using a neutralization reaction between gases provided between the main spraying unit and the reaction unit and including an auxiliary spraying unit provided with an ultrasonic atomizer for spraying an aqueous solution containing a surfactant in a gaseous state. The method of claim 1, wherein the second material is
Noxious gas and odor gas purification apparatus using a neutralization reaction between gases, characterized in that the alkali solution of 0.01 to 1 mol%. The method of claim 2, wherein the alkaline solution is
A harmful gas and odor gas purification apparatus using neutralization reaction between gases, characterized in that any one selected from the group consisting of aqueous sodium hydroxide solution, potassium hydroxide solution, calcium hydroxide solution, and ammonia solution. The method of claim 1,
If the first material is an acidic material,
The second substance is a harmful gas and odor gas purification apparatus using a neutralization reaction between gases, characterized in that the basic solution. The method of claim 1,
When the first substance is a basic substance,
The second substance is an harmful gas and odor gas purification apparatus using a neutralization reaction between gases, characterized in that the acidic solution. delete delete According to claim 1, wherein the aqueous solution containing the surfactant is
Hazardous and odor gas purification apparatus using a neutralization reaction between gases, characterized in that consisting of 0.01 to 1% by weight of surfactant and 99 to 99.99% by weight of water. The method of claim 1,
Sensor unit for measuring the state of the harmful gas and odor gas; And
Further comprising a control board for receiving information transmitted from the sensor unit,
The main spraying unit comprises a spray chamber which provides a space where the first material and the second material contact each other, an ultrasonic atomizer installed at one side of the spray chamber to spray the second material in a gaseous state, and a first storage in which an acidic solution is stored. A supply pipe comprising a portion, a second storage part storing a basic solution, a first supply pipe connecting the ultrasonic atomizer and the first storage part, and a second supply pipe connecting the ultrasonic atomizer and the second storage part, and the first supply part. Noxious and odorous gases using neutralization reaction between gases, which are provided in the supply pipe and the second supply pipe, respectively, connected to the control board, and configured to flow out and open the supply pipe according to the control signal of the control board. Purifier.

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