KR20220134066A - Hazardous Exhaust Gas Wet Purification device - Google Patents

Abstract

The present invention relates to a wet purification device capable of treating exhaust gas discharged along with contaminants such as fine dust and a hazardous gas and, more specifically, to a hazardous gas purification device (100) which comprises a first filtration tank (111), a second filtration tank (112), a third filtration tank (113), and a fourth filtration tank (114), wherein the first filtration tank (111) to the fourth filtration tank (114) are connected to one another by a gas transfer line (160) such that exhaust gas is purified and transferred sequentially. A cleaning water supply line is installed to supply the cleaning water to an injection nozzle (150) and a mist nozzle (151) installed in the first filtration tank (111) to the fourth filtration tank (114) and the fourth filtration tank (114) includes a primary demister filter (141) and a secondary demister filter (142) for removing moisture from the purified gas before discharge. According to the present invention, provided is the wet purification device of a hazardous exhaust gas, which can purify exhaust gas occurring in a waste incineration plant, exhaust gas occurring in a combined heat power plant, and exhaust gas occurring in a waste sludge drying apparatus in a wet method.

Description

Hazardous Exhaust Gas Wet Purification device

The present invention relates to a wet purification device capable of treating exhaust gas that is discharged together with pollutants such as fine dust and harmful gas, and more particularly, exhaust gas generated from a waste incineration plant, exhaust gas generated from a combined heat and power plant , It relates to a wet purifying device for harmful exhaust gas that can purify exhaust gas generated from a steel mill and exhaust gas generated from a waste sludge drying device in a wet manner.

In general, a treatment device for purifying harmful gas generated in an industrial field is composed of a dry type and a wet purification device.

The dry purifier is a method of removing gas by filling the purifier with a neutralizing adsorbent with good degassing performance. high pressure loss,

There is a disadvantage in that the gas removal efficiency is lowered due to a drift phenomenon occurring inside the filling layer.

In addition, in a process in which a high concentration of gas is introduced, the lifespan is short, so the neutralization adsorbent or filler must be frequently replaced, and there is a disadvantage of increasing the size, resulting in a large amount of waste.

In addition, the wet purifier is a technology in which gas is absorbed by the liquid film by the filling material or the plate and the sprayed droplets by the cleaning liquid sprayed by the nozzle to remove odors and harmful gases. The washing liquid used at this time is water or a neutralized adsorption liquid.

Wet purifiers are classified into spray towers, packed towers, cyclone scrubbers, and venturi scrubbers according to the removal principle.

In the simplest form, the spray tower removes dust with sufficient contact time between the rising polluting gas and the droplets of the cleaning liquid sprayed from the top, and has a low pressure loss but low removal efficiency.

The packed tower is widely used for the treatment of harmful gases due to its good efficiency, but the pressure loss increases due to the formation of scale in the filler, and it has the disadvantages of being large in size when removing high concentrations and generating a large amount of waste.

Looking at the prior art in this field, a scrubber device for purifying exhaust gas that can simultaneously treat harmful gas and fine dust of Patent Publication No. 10-0484563 (registration date: April 13, 2005) is shown in FIG. As described above, in the scrubber device for exhaust gas purification using a vortex method having a cylindrical multi-stage reactor,

A gas inlet fan for introducing solid particles and exhaust gas in gas and vapor state into the first reactor in the cylinder in a predetermined amount and in a desired direction;

In order to induce a combination of the cleaning liquid and the vortex airflow formed by the gas introduced by the gas inlet fan to remove dust and harmful gases, the cleaning liquid stored in the lower part of the cylinder is evenly sprayed through the nozzles in each reactor in the cylinder in multiple directions. a cleaning liquid spray pump;

a turbidity sensor installed at the same position as the cleaning liquid spray pump to detect the degree of turbidity of the cleaning liquid;

An LED (display unit) that compares the electrical signal measured by the turbidity sensor with a preset reference signal (turbidity reference value) to inform that the cleaning solution needs to be replaced when the turbidity of the cleaning solution is high;

The gas and dust introduced into the first reactor under the cylinder by the gas inlet fan and the cleaning liquid sprayed by the cleaning liquid spray pump induce as many collisions as possible by the vortex airflow formed by the gas inlet fan and are harmful by gravity. a first reactor in a cylinder for removing gas and dust;

When the inflow gas moves from the first reactor in the cylinder to the second reactor at the top, the first blade is installed to reverse the flow of the inflow gas and to control the amount of gas inflow and to which a direction key is attached;

The gas passed through the first blade and introduced into the second reactor in the cylinder moves in the opposite direction to the air flow in the first reactor, and the residual harmful gas and dust in the second reactor and the cleaning liquid sprayed through the nozzle are as much as possible. A second reactor in the cylinder for removing harmful gases and dust by inducing collision;

When the inflow gas moves from the second reactor in the cylinder to the third reactor at the top, the second blade is installed to reverse the flow of the inflow gas and at the same time to control the gas inflow, and a direction key is attached;

The gas passed through the second blade and introduced into the third reactor in the cylinder moves in the opposite direction to the air flow in the second reactor and causes as many collisions as possible with the gas and dust in the second reactor and the cleaning solution sprayed through the nozzle. A third reactor in the cylinder to remove harmful gas and dust,

The third reactor and the uppermost exhaust part of the cylinder are combined to induce a collision between the vortex airflow formed in the third reactor and the plate to which the direction key is attached, thereby removing gas and dust once more and simultaneously controlling the airflow direction and flow of the exhaust gas. Inducing gas exhaust

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The collision of the vortex air stream formed by the gas inlet fan and the cleaning liquid and the gas and dust dropped by gravity are guided to the lower portion of the cleaning liquid to minimize the cleaning liquid turbidity, and a layer of a material having a higher specific gravity than the cleaning liquid and a material having a lower specific gravity than the cleaning liquid a funnel-shaped structure that naturally induces a cleaner cleaning solution to exist at the input portion of the cleaning solution supply pump;

Disclosed is a scrubber device for purifying exhaust gas having an organic solvent recovery line capable of recovering an organic solvent having a lower specific gravity than the cleaning solution.

The prior art of FIG. 1 is a scrubber for removing harmful exhaust gas using a high-speed vortex air stream to remove and process gas and dust with high efficiency by supplementing the gas removal function and dust removal function of the conventional dry and wet scrubbers. As to provide an apparatus, the prior art of FIG. 1 employing a vortex-type wet scrubber uses an increase in the number of rotational airflows according to an increase in the rotational force in the cylinder, rather than the absorption of gas and droplets or neutralization by chemical reaction of gas and droplets. It is a configuration in which gas or dust is collected in the droplets due to the forced collision between the accelerated centrifugal force of the airflow and the high-speed spraying cleaning liquid, and there is a problem in that noise is generated due to the accelerated centrifugal force of the airflow and the high-speed injection of the cleaning liquid.

In particular, since the cleaning liquid sprayed through the cleaning liquid spray nozzle has a large particle size, the contact area with the inflow gas is small, so there is a problem in that the purification efficiency is lowered.

Republic of Korea Patent Publication No. 10-0484563

The present invention is to solve the above problems, and the exhaust gas generated from a waste incineration plant, the exhaust gas generated from a cogeneration plant, and the exhaust gas generated from the waste sludge drying device are repeatedly purified through a plurality of wet filtration tanks sequentially. with a purpose to be able to be.

Another object is to provide a purification device with improved economic efficiency by simplifying the structure of the filtration tank that purifies the exhaust gas and increasing the efficiency,

In addition, if necessary, it is installed in the same box as a container to install a purification device regardless of the installation location, and at the same time, the appearance of the treatment facility is beautiful and harmonious with the surrounding environment to provide environmentally friendly facilities. It relates to a wet purifier.

The present invention is a means for achieving the above object, a harmful gas purification device,

A first filtration tank, a second filtration tank, a third filtration tank, and a fourth filtration tank are formed, but the first to fourth filtration tanks are respectively connected by a gas movement line so that the exhaust gas is sequentially purified and moved, A washing water supply line is installed to supply washing water to the injection nozzles installed in the first to fourth filtration tanks, and the fourth filtration tank is a primary demister to remove moisture before the purified gas is discharged. It is characterized in that a filter and a secondary demister filter are installed.

The first to third filtration tanks constituting the harmful gas purification device are,

an inlet pipe installed on one side of the tank body to introduce exhaust gas generated from the incinerator;

a spray nozzle and a mist nozzle installed at predetermined intervals to purify harmful gas at the upper end of the inlet pipe in the tank body;

a washing water supply pipe connected to the jet nozzle and the mist nozzle to jet the washing water and connected between the jet nozzle and the mist nozzle and the motor pump;

an adsorption water storage unit for storing the washing water sprayed from the spray nozzle and the mist nozzle after contact with the harmful gas;

an adsorbed water supply device formed on one side of the adsorbed water storage unit and installed to control the level of adsorbed water;

It is formed on the upper end of the tank body and characterized in that it comprises an outlet for discharging the purified gas.

The harmful gas inlet pipe installed in the first to third filtration tanks is characterized in that an end positioned inside the tank body is bent downward, and a funnel-shaped dust collecting demister filter is installed inside the bent end.

The harmful gas inlet pipe of the first filtration tank is characterized in that the injection nozzle and the mist nozzle are installed inside the inlet and connected to the washing water supply line.

In the fourth filtration tank, a spray nozzle through which washing water is sprayed is installed inside the upper part of the harmful gas inlet pipe, and a first demister filter and a second demister filter are installed on the upper part of the spray nozzle to remove moisture from the exhaust gas. characterized.

A mist nozzle and a spray nozzle are installed on the inner upper part of the first to third filtration tanks, and a see-through window is installed on one side of the tank body.

As another embodiment of the present invention, the first to fourth filtration tanks constituting the harmful gas purifying device are installed in a container box, so they are easy to move, have a beautiful appearance, and the components are unitized. do it with

The present invention configured as described above introduces exhaust gas generated from a waste incineration plant or exhaust gas generated from a combined heat and power plant, exhaust gas generated from a steel mill, exhaust gas generated from a waste sludge drying device, etc. into the harmful gas inlet pipe on one side of the first filtration tank It relates to a wet purifying device for harmful exhaust gases that can repeatedly purify harmful substances in the process of sequentially passing through the first to fourth filtration tanks.

In the present invention, exhaust gas generated from a waste incineration plant, exhaust gas generated from a combined heat and power plant, exhaust gas generated from a steel mill, exhaust gas generated from a waste sludge drying device, etc. is divided into a multi-stage filtration tank equipped with an injection nozzle and a mist nozzle. By installing it to repeatedly wet-purify harmful gases, it has the effect of reducing facility costs and treatment costs while improving the purification treatment efficiency.

In addition, as another embodiment of the present invention, by installing a multi-stage filtration tank in a container box, the expansion of the exhaust gas purification facility can be simply and easily expanded, and the appearance of the installation facility is beautiful and is environmentally friendly by making it harmonious with the surrounding environment. It has the effect of providing a harmful gas purification device.

1 is an overall configuration diagram showing a conventional scrubber device for purifying exhaust gas. Figure 2 is an overall configuration diagram showing the harmful exhaust gas purification apparatus of the present invention. Figure 3 is a cross-sectional view showing the internal configuration of the first to third filtration tanks constituting the harmful exhaust gas purification apparatus of the present invention. Figure 4 is a cross-sectional view showing the dust collecting demister filter in the form of a funnel installed at the end of the inlet pipe inside the first to third filtration tanks of the present invention. Figure 5 is a cross-sectional view showing the adsorption water supply device installed on one side of the adsorption water storage tank of the present invention. Figure 6 is a plan view of the interior of the first to third filtration tanks in the harmful gas purification apparatus of the present invention.

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

Figure 2 is an overall configuration diagram showing the harmful gas purification apparatus of the present invention, the first filtration tank 111, the second filtration tank 112, the third filtration tank 113, the fourth filtration tank 114 harmful A gas purification device 100 is constituted.

In the first filtration tank 111 to the fourth filtration tank 114, an inlet pipe 116 is installed on one side of the tank body 115, and the inlet pipe 116 is exhaust gas generated from a waste incineration plant or a combined heat and power plant. It is connected to the exhaust gas pipe of any one of the exhaust gas generated from the waste gas and the exhaust gas generated from the waste sludge drying device.

For example, when the harmful gas purification apparatus 100 of the present invention is installed in a waste incinerator, the exhaust gas communication of the incinerator of the waste incinerator is connected to the inlet pipe 116 of the first filtration tank 111 .

After the exhaust gas generated from the incinerator of the incinerator flows into the inlet pipe 116 of the first filtration device 111, the dust collection demister filter 140 installed inside the distal end of the inlet pipe 116 of the first filtration device 111 The exhaust gas flowing in from the

After the harmful exhaust gas introduced as described above filters the primary fine dust in the dust collecting demister filter 140 , the exhaust gas moves upward by the airflow generated by the driving of the blower fan 161 , while the mist nozzle The harmful substances mixed in the exhaust gas are adsorbed and purified by the washing water sprayed from the 151 and the injection nozzle 150, and then secondary filtration through the gas transfer line 160 in the form of a communication connected to the upper outlet 117 It flows into the inlet pipe 116 of the tank 112, and its exhaust gas passes through the secondary filtration tank 112 and the tertiary filtration tank 113 in the same way as the purification method of the primary filtration tank 111. Again, the exhaust gas is adsorbed by the washing water sprayed from the injection nozzle of the fourth filtration tank 114 and then the moisture is removed from the primary demister filter 141 and the secondary demister filter 142 and then discharged. .

The primary filtration tank 111 to the fourth filtration tank 114 are installed such that a gas transfer line 160 is connected between the filtration tank and the filtration tank so that the exhaust gas passes sequentially to be purified.

In addition, a spray nozzle 150 and a mist nozzle 151 are installed at the inner inlet of the inlet pipe 116 of the primary filtration tank 111 to spray and mist the washing water to be introduced through the inlet pipe 116. After the exhaust gas is first purified and cooled, it is sent to the dust collecting demister filter 140 in the form of a funnel installed inside the distal end of the inlet pipe 116 .

The washing water sprayed from the injection nozzle 150 and the mist nozzle 151 installed at the inlet of the inlet pipe 116 is the primary filtration tank 111 by the heat, pressure and airflow of the exhaust gas discharged after incineration in the incinerator. moved to the side

3 is a view showing the internal configuration of the first to third filtration tanks constituting the harmful gas purification apparatus of the present invention, the first filtration tank 111 to the third filtration tank 113, the tank body 115 one side An inlet pipe 116 is installed so that the exhaust gas generated from the incinerator is introduced into the incinerator.

In the upper portion of the inlet pipe 116 in the tank body 115, the injection nozzle 150 and the mist nozzle 151 are installed at predetermined intervals to purify the harmful gas.

The spray nozzle 150 and the mist nozzle 151 are sprayed with the cleaning water supplied from the cleaning water supply line 170 installed on one side of the spray or mist.

The injection nozzle 150 and the mist nozzle 151 installed in parallel in the first filtration tank 111 to the third filtration tank 113 are vertically spaced apart from each other, and the injection nozzle 150 is exhausted while spraying fine water droplets. It is brought into contact with the gas, and the mist nozzle 151 sprays the washing water into a mist so that the contact time with the exhaust gas is prolonged and the mist nozzle 151 is brought into contact with the exhaust gas so that it can be purified.

The washing water supplied to the spray nozzle 150 and the mist nozzle 151 may be ordinary tap water or a cleaning liquid, and the cleaning water in the cleaning liquid may be sprayed to the spray nozzle 150, and the mist nozzle 151 ), water can be used as washing water and mist can be sprayed.

In the present invention as described above, the exhaust gas introduced through the inlet pipe 116 comes into contact with the washing water sprayed from the injection nozzle 150 and the mist nozzle 151 of the first filtration tank 111 and is purified, and then again 2 After being purified by contact with the washing water sprayed from the spray nozzle 150 and the mist nozzle 151 of the primary filtration tank 112 , the exhaust gas is repeatedly purified by the washing water in the same manner in the tertiary filtration tank 113 . It is possible to increase the purification efficiency of

In addition, a motor pump 171 is installed in the washing water supply pipe 170 so that washing water is supplied to the jet nozzle 150 and the mist nozzle 151 so that the washing water is sprayed from the jet nozzle 150 and the mist nozzle 151 . .

In addition, at the inner lower end of the primary filtration tank 111 to the fourth filtration tank 114 of the present invention, harmful substances are adsorbed to the washing water during contact with the exhaust gas while being sprayed from the injection nozzle 150 and the mist nozzle 151. An adsorption water storage unit 120 in which the adsorbed water is stored is provided.

In addition, the adsorbed water supply device 130 is installed in the tank body 115 on one side of the adsorbed water storage unit 120 to control the water level of the adsorbed water.

The adsorbed water supply device 130 is designed to manage the adsorbed water level stored in the adsorbed water storage unit 120, and supplies water when the water level in the adsorbed water storage unit 120 decreases, and when the adsorbed water level rises above a certain standard to be ejected automatically.

In addition, a discharge port 117 is formed at the upper end of each of the tank body 115 of the primary filtration tank 111 to the fourth filtration tank 114 of the present invention, so that the exhaust gas is discharged.

4 is a cross-sectional view showing the dust collecting demister filter in the form of a funnel installed at the end of the inlet pipe inside the first to third filtration tanks of the present invention, and the exhaust gas flowing through the inlet pipe 116 of each filtration tank As it passes through the dust collector filter 140, fine dust and harmful substances are adsorbed and only air passes through.

The dust collecting demister filter 140 has a funnel shape, and the upper part is wide and the lower part is narrow. The body of the Mr. filter 140 has a space portion 144 formed so that, while the exhaust gas passes through the metal filter 143 , fine dust and gas are collected and only air passes.

In addition, the dust collecting demister filter 140 formed in a funnel shape is fine dust collected on the metal filter 143 by the washing water sprayed from the spray nozzle 150 and the mist nozzle 151 installed at the inlet of the inlet pipe 116 . The dust is washed and separated into the adsorbed water storage unit 120 at the bottom to fall.

The dust collecting demister filter 140 of the present invention can collect fine dust and comprehensive harmful substances in exhaust gas with a long lifespan, and can be used semi-permanently because it is easy to clean.

In addition, the filter material of the demister filter is made of iron materials such as stainless steel and aluminum, so it can be used freely without being limited by high and low temperatures without corrosion.

5 is a cross-sectional view showing the adsorbed water supply device installed on one side of the adsorbed water storage tank of the present invention, the primary filtration tank 111, the secondary filtration tank 112, the tertiary filtration tank 113, the fourth filtration tank of the present invention. An adsorption water storage unit 120 in which harmful substances such as fine dust are adsorbed to the washing water in the process of being in contact with the sprayed and misted washing water and the exhaust gas are adsorbed and then the adsorbed water is stored at the bottom of the inner bottom of the 114 is provided.

The adsorbed water supply device 130 is installed on one side of the adsorbed water storage unit 120 to control the adsorbed water level.

The adsorbed water supply device 130 is provided with a buoyant 131, a supply pipe 132, and a drain pipe 133, and a “C”-shaped screen 134 is installed on the front surface of the adsorbed water to move the exhaust gas. It is installed to prevent the buoyancy 131 from moving up and down while swaying by the airflow generated from the .

The shielding film 134 is installed in a “C” shape on a plane and has an open top and a bottom surface.

The adsorbed water supply device 130 is designed to manage the adsorbed water level, and when the water level of the adsorbed water storage unit 120 is lowered, tap water can be supplied from the supply pipe 132 in which the buoy 131 is installed, and the adsorbed water level When is higher than a certain standard, it is automatically discharged through the drain pipe (133).

The buoyancy 131 is installed on the front side of the supply pipe 132 so that the supply pipe 132 is opened and closed according to the level of the adsorbed water, so that when the water level is low, water can be automatically supplied.

In addition, a drain pipe 190 is installed on one side of the lower end of each tank body of the primary filtration tank 111 to the fourth filtration tank 114 of the present invention, so that the adsorbed water stored in the adsorbed water storage unit 120 of each filtration tank is drained. Or, to drain the washing material when cleaning the inside of the tank.

6 is a cross-sectional plan view of the interior of the first to third filtration tanks in the harmful gas purification apparatus of the present invention, the primary filtration tank 111, the secondary filtration tank 112, and the tertiary filtration tank of the present invention. As shown by cutting 113 on a plane, a spray nozzle 150 is installed on the upper part to spray the washing water, and a mist nozzle 151 is installed on the lower part to spray the washing water as mist. it was made to

Although the arrangement of the spray nozzle 150 and the mist nozzle 151 shown in FIG. 6 of the present invention is shown in a circle, this is an example, and the arrangement of the spray nozzle 150 and the mist nozzle 151 is "-" It can be selectively installed according to the installation environment such as a shape, a circle, a square, a polygon, etc.

6 is a plan cross-sectional view of the filtration tank of the present invention showing as an example the position of each component installed in the tank body 115, and the arrangement of the components can be installed in various forms as needed.

In addition, as another embodiment of the present invention, the harmful gas purification device configured as shown in FIG. 1 can be installed in the container box to allow movement freely, and can be installed to harmonize with the surrounding environment.

In addition, the primary filtration tank 111, the secondary filtration tank 112, the tertiary filtration tank 113, and the fourth filtration tank 114 constituting the present invention can observe the spraying and spraying device installed therein. A sight window 180 was installed on one side of the tank body.

In addition, the present invention installs a concentration sensor in the adsorbed water storage unit 120 provided in the primary filtration tank 111, the secondary filtration tank 112, the tertiary filtration tank 113, and the fourth filtration tank 114, respectively. A digital indicator is installed on one side of the tank body to be connected to the concentration sensor so that the concentration of the adsorbed water stored in the adsorbed water storage unit can be observed.

If the present invention is integrated into a container box, there is an advantage that it can be freely installed in island and mountainous regions, ships, buildings, industrial sites, etc. In addition, if you want to increase the amount of treatment and purification of exhaust gas, a plurality of container boxes installed with the present invention are stacked. Alternatively, it has the advantage of being able to easily and easily expand if connected in a row.

The present invention as described above makes it possible to simply and easily purify the exhaust gas generated from the waste incineration plant, the exhaust gas generated from the combined heat and power plant, and the exhaust gas generated from the waste sludge drying apparatus by wet method, and at the same time, environmentally friendly harmful exhaust gas wet This is to provide a purifier.

100: harmful gas purification device 111: first filtration tank 112: second filtration tank 113: third filtration tank 114: fourth filtration tank 115: tank body 116: inlet pipe 117: outlet 120: adsorbed water storage unit 130: adsorbed water supply device 131: Bugu 132: Supply pipe 133: drain pipe 134: screen 140: dust collection demister filter 141: first demister filter 142: second demister filter 143: metal filter 144: space 150: injection nozzle 151: mist nozzle 160: gas transfer line 161: blow fan 170: washing water supply pipe 180: sight window 190: drain tube

Claims (6)

The harmful gas purification device 100 is formed of a first filtration tank 111 , a second filtration tank 112 , a third filtration tank 113 , and a fourth filtration tank 114 , but a first filtration tank 111 . ) to the fourth filtration tank 114 are respectively connected to the gas transfer line 160 so that the exhaust gas is sequentially purified and moved, and installed in the first filtration tank 111 to the fourth filtration tank 114. A washing water supply line is installed to supply washing water to the spray nozzle 150 and the mist nozzle 151, and the fourth filtration tank 114 is a primary demister filter to remove moisture before the purified gas is discharged. (141) and the secondary demister filter (142) is a harmful exhaust gas wet purification device, characterized in that installed. According to claim 1, The first filtration tank 111 to the third filtration tank 113 constituting the harmful gas purification device 100, The exhaust gas generated from the incinerator to one side of the tank body 115 to be introduced An inlet pipe 116 installed; An injection nozzle 150 and a mist nozzle 151 installed at predetermined intervals to purify harmful gases at the upper end of the inflow pipe 116 in the tank body 115; The injection nozzle A cleaning water supply pipe 170 having a motor pump 1741 installed on one side so as to spray cleaning water to 150 and the mist nozzle 151; and cleaning sprayed from the spray nozzle 150 and the mist nozzle 151 An adsorbed water storage unit 120 for storing water after contact with harmful gases; an adsorbed water supply device 130 formed on one side of the adsorbed water storage unit 120 and installed to control the water level of the adsorbed water; Harmful exhaust gas wet purification apparatus, characterized in that it comprises an outlet (117) formed at the upper end of the tank body (115) to discharge the purified gas. According to claim 1, The first filtration tank 111 to the third filtration tank 113 is installed in the harmful gas inlet pipe 116 has an end located inside the tank body 115 is bent downward, the bent It is characterized in that a funnel-shaped dust collecting demister filter 140 is installed inside the distal end. According to claim 1, The harmful gas inlet pipe 116 of the first filtration tank 111 is connected to the washing water supply pipe 170 by installing a spray nozzle 150 and a mist nozzle 151 inside the inlet. Hazardous exhaust gas wet purification system characterized by. According to claim 1, The fourth filtration tank 114 is installed in the upper inner side of the harmful gas inlet pipe 116, the injection nozzle 150 to which the washing water is sprayed, the injection nozzle 150 is mixed with the exhaust gas on the upper side. Noxious exhaust gas wet purification apparatus, characterized in that the primary demister filter 141 and the secondary demister filter 142 are installed to remove the moisture. According to claim 2, The first filtration tank (111) to the fourth filtration tank (114) constituting the harmful gas purification device (100) is to be converted into a unit in a container box so that it is easy to move. , and harmful exhaust gas wet purification apparatus, characterized in that it can be installed in a stacked or arranged form when the harmful gas purification apparatus 100 is expanded.

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