KR200196779Y1 - Exhaust gas purification apparatus - Google Patents

Abstract

The present invention relates to an exhaust gas purifying apparatus, and the present invention includes a vortex chamber (10) having a first upper chamber (12) and a first lower chamber (14); An exhaust gas supply pipe (20) having a reactor (80) into which the high-temperature exhaust gas is tangentially supplied into the first upper chamber (12) and slaked lime is introduced; A plurality of injection nozzles 30 installed on an inner wall of the first upper chamber 12 and configured to form a forced vortex in the vortex chamber 10; A hollow tube 40 installed through a central portion of the upper plate of the first upper chamber 12; It is composed of a discharge part 50 formed in the first lower chamber 14 so that the gas and dust cooled by the forced vortex is separated and discharged, according to the present invention, the durability of the installation is improved by the reactor in which slaked lime is introduced In addition, the harmful gas is firstly removed, and the exhaust gas passes through the multi-stage vortex chamber 10, thereby removing dust or harmful substances contained in the exhaust gas without installing a separate chemical treatment facility. In addition, by cooling and discharging the hot exhaust gas, a useful effect of preventing air pollution is provided.

Description

Exhaust Gas Purifier {EXHAUST GAS PURIFICATION APPARATUS}

The present invention relates to an exhaust gas purification apparatus, and more particularly, to an exhaust gas purification apparatus capable of removing toxic gases such as dust and nitrogen oxides contained in exhaust gases supplied by forcibly generating vortices in a vortex chamber.

In general, an exhaust gas purifier used in an incinerator is used to cool a hot exhaust gas discharged from an incinerator by water cooling and then purify it through a filter such as a bag filter.

However, the conventional purifier has a problem in that an exhaust gas cooler is essentially provided to prevent the filter from being damaged by the high temperature exhaust gas. In addition, when the exhaust gas is cooled with water, waste water is generated.

On the other hand, it is difficult to completely remove the harmful substances such as nitrogen oxides contained in the exhaust gas generated from the incinerator with a bag filter, there was a problem that an expensive catalytic reduction device must be used to remove such harmful substances.

The present invention is designed to solve the problems of the prior art as described above, the technical problem of the present invention is to use the vortex without having a separate chemical treatment equipment for dust or nitrogen oxides contained in the exhaust gas It is possible to separate and discharge, and to provide a means for cooling the hot exhaust gas.

1 is a cross-sectional view showing a first embodiment of the exhaust gas purifying apparatus according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a view showing the operating state of the exhaust gas purification device shown in Figure 1, 3a is a front sectional view, 3b is a plan sectional view.

Figure 4 is a schematic diagram showing a state in which the purifier according to the present invention is applied to the incineration apparatus used.

Figure 5 is a front sectional view showing a second embodiment of the purification device according to the present invention.

Figure 6 is a front sectional view showing a third embodiment of the purification device according to the present invention.

Figure 7 is a front sectional view showing a fourth embodiment of the purification device according to the present invention.

Figure 8 is a sectional view showing another embodiment of the injection nozzle according to the present invention.

<Description of the code | symbol about the principal part of drawing>

10: vortex chamber 12: first upper chamber

14: first lower chamber 20: exhaust gas supply pipe

30: injection nozzle 40: hollow tube

50: discharge part 51: the first dust discharge port

52: first gas outlet CP: critical point

The present invention for solving the above technical problem is a swirl chamber having a first upper chamber, the upper surface is closed and formed in a cylindrical shape, the first lower chamber is formed in a conical shape is installed below the first upper chamber; An exhaust gas supply pipe installed in a tangential direction on an upper outer circumferential surface of the first upper chamber to supply hot exhaust gas in a tangential direction; A plurality of injection nozzles radially inclined on an inner wall of the first upper chamber and configured to form forced vortices in the vortex chamber by injecting compressed air at room temperature in a supply direction of exhaust gas; A hollow tube installed through a central portion of the upper plate of the first upper chamber; It provides an exhaust gas purification apparatus comprising an exhaust portion formed in the first lower chamber so that the gas cooled by the forced vortex formed by the compressed air injected from the injection nozzle is separated and discharged.

At this time, the discharge portion is provided at the critical point of the first lower chamber and the first dust outlet formed to discharge the dust separated from the exhaust gas by forced vortex; And a first gas outlet installed at a position before the critical point of the first lower chamber, the dust being separated by the forced vortex, and configured to discharge the cooled gas.

On the other hand, according to another embodiment of the present invention, by providing a separate auxiliary vortex chamber in the lower portion of the vortex chamber to provide an exhaust gas purification device configured to facilitate the separation or removal of dust and harmful gases.

In addition, according to another embodiment of the present invention, there is provided an exhaust gas purification device that can increase the purification effect by installing a plurality of vortex chambers in multiple stages under the vortex chamber.

Referring to the first preferred embodiment of the present invention having the features as described above in detail based on the accompanying drawings as follows.

In the accompanying drawings, Figure 1 is a cross-sectional view showing an exhaust gas purifying apparatus according to the present invention, Figure 2 is a cross-sectional view taken along line A-A of FIG.

Hereinafter, reference numeral '100' is a purifier, '200' is an incinerator, and '201' is a combustor.

As shown in the accompanying drawings, the exhaust gas purifying apparatus 100 according to the present invention includes a first upper chamber 12 formed in a cylindrical shape, a first lower chamber installed below the first upper chamber 12 ( 14 and a forced vortex in the vortex chamber 10 and the exhaust gas supply pipe 20 provided in a tangential direction on the upper outer circumferential surface of the first upper chamber 12 and the vortex chamber 10. Cooled by forced vortex formed with a plurality of injection nozzles 30, a hollow tube 40 installed through the central portion of the upper plate of the first upper chamber 12, and compressed air injected from the injection nozzles 30 The discharge unit 50 is formed in the first lower chamber 14 so that the gas and dust are separated and discharged.

This will be described in more detail as follows.

The vortex chamber 10 is formed of a first upper chamber 12 and a first lower chamber 14. An upper surface of the first upper chamber 12 is closed and a lower portion of the first lower chamber 14 ) Has a combined structure.

The vortex chamber 10 may be made of a refractory brick so as to withstand the pressure generated therein when a forced vortex occurs by the injection nozzle 30, and the friction chamber with the dust moved by the vortex therein. The damage may be formed of a material that can be minimized. At this time, the length and diameter of the first upper chamber 12 and the first lower chamber 14 may be changed according to the processing capacity of the exhaust gas.

The exhaust gas supply pipe 20 is for supplying exhaust gas to the vortex chamber 10. The exhaust gas supply pipe 20 is tangentially installed on an outer circumferential surface of the first upper chamber 12.

That is, as shown in FIG. 2, the exhaust gas supply pipe 20 has an upper outer circumferential surface of the first upper chamber 12 such that the exhaust gas supplied along the inner wall of the vortex chamber 10 forms a vortex. It is installed in the tangential direction.

The injection nozzle 30 is installed on the inner wall of the first upper chamber 12 to inject compressed air of high pressure so that forced vortex is formed inside the vortex chamber 10. The injection nozzle 30 is It is to inject high pressure compressed air generated from a compressor (not shown).

At this time, each end of each injection nozzle 30 is installed inclined in one direction with respect to the inner wall of the first upper chamber 12, and is radially installed, which is easy to rotate the compressed air to be injected is a strong force Vortex is to be formed, the compressed air injection direction of each injection nozzle 30 is matched with the movement direction of the exhaust gas supplied to the exhaust gas supply pipe 20, that is, the rotation direction. Each of these injection nozzles 30 is embedded in the inner surface of the first upper chamber 12.

The hollow tube 40 is installed through the center of the upper plate of the vortex chamber 10, and when the forced vortex is formed by the injection nozzle 30 in the vortex chamber 10, the pressure inside the vortex chamber 10 To respond to change.

The discharge part 50 is formed to discharge dust and gas separated from each other by forced vortex, and is installed at the critical point CP of the first lower chamber 14 and separated from the exhaust gas by forced vortex. The first dust discharge port 51 formed to discharge the dust, and is installed at the position before the critical point CP of the first lower chamber 14, the dust is separated by forced vortex formed to discharge the cooled gas The first gas outlet 52 is formed.

When explaining the process of the gas and dust is discharged through the discharge unit 50 as follows. That is, when the forced vortex is formed by the plurality of injection nozzles 30 in the vortex chamber 10, the high-temperature exhaust gas and the compressed air supplied are lowered while rotating along the inner wall of the first upper chamber 12. The first lower chamber 14 is rotated at a higher speed and descends to be discharged through the gas outlet 52 reaching the bottom of the first lower chamber 14. The dust or water vapor contained in the exhaust gas is separated from the gas by centrifugal force, moves to the inner wall side, descends into a spiral shape, and is discharged to the first dust outlet 51. Therefore, the first dust discharge part 51 is formed at the point where the vortex is reversed and rises, that is, the critical point CP, so that the dust separated from the gas can be discharged.

On the other hand, the first gas outlet 52 is installed at a position before the critical point (CP) of the first lower chamber 14, it is formed so that the gas from which the pollutant separated by the vortex is discharged.

Referring to the operation of the purification device 100 according to the present invention configured as described above in detail based on the accompanying drawings as follows.

3A and 3B, when compressed air at room temperature is injected through the injection nozzle 30 and hot exhaust gas is supplied to the exhaust gas supply pipe 20, the vortex chamber ( A forced vortex is formed in the first upper chamber 12 of FIG. 10 so that the exhaust gas and the compressed air spirally rotate in one direction along the inner wall of the first upper chamber 12.

As such, the exhaust gas and the compressed air, which are spirally rotated along the inner wall of the first upper chamber 12, are lowered while the first lower chamber 14 is spirally rotated along the inner wall, and the first lower chamber ( When the critical point CP of 14) is reached, the exhaust gas is inverted in the center and swinged upward to be discharged to the outside through the first gas outlet 52 installed at the position before the critical point CP.

In this process, the mixed gas of the high-temperature exhaust gas and the compressed air at room temperature exchanges heat and condenses water vapor generated by the temperature difference to form a mist (MIST). The mist, dust, CO, Hazardous components such as SOx, NOx, and XO2 are primarily dissolved, and the mist is absorbed into the dust and aggregates again, thereby increasing its particle size.

In this way, the contaminants separated from the mixed gas, dissolved in the mist, and aggregated in the dust are lowered while spirally turning along the inner wall of the first upper chamber 12 and the inner wall of the first lower chamber 14, thereby reducing the critical point (CP). The exhaust gas is discharged to the first dust outlet 51 without being raised. Therefore, the high temperature exhaust gas is cooled and dust and various harmful substances contained in the exhaust gas can be removed.

For reference, the process of treating nitrogen oxide (NOx) contained in the exhaust gas extracted from the contents of the pollutant analysis guide issued by the Japan Chemical Association is as follows.

Nitrogen oxides are the most damaging of the substances that cause air pollution. Among these nitrogen oxides, nitrogen dioxide (NO₂) is produced when nitrogen monoxide (NO) is oxidized one step further, and when cooled, two-molecule bonds. The reaction is carried out to change to colorless liquid nitrogen tetraoxide (N₂O₄). The scheme is represented as follows.

2NO₂ <-－－> N₂O₄ + Q －－－－－－ (1)

This reaction is a reversible reaction and an exothermic reaction. The equilibrium equation (1) proceeds to the right when the temperature decreases, and the presence rate of nitrogen dioxide (NO₂) drops to '0' at 17 ° C under atmospheric pressure so that nitrogen dioxide (NO₂) is completely liquid nitrogen tetraoxide (N₂O₄). Is changed.

The counterbalance equation 1 proceeds to the right even when the pressure increases. Therefore, even when the temperature is 17 ° C. or higher, it is possible to set the ratio of nitrogen dioxide (NO 2) to '0' as the pressure increases.

As such, nitrogen tetraoxide ((N₂O₄) in the liquid state, in which nitrogen dioxide (NO₂) is changed by temperature change and pressure change, is adsorbed to the dust absorbed by the mist, which causes nitrogen dioxide (NO₂) contained in exhaust gas. Can be removed.

As a result, the high temperature exhaust gas supplied into the vortex forming member 10 may be cooled by heat exchange with a compressed air at room temperature and a temperature drop, and harmful substances such as nitrogen oxides contained in the exhaust gas may be stored in the mist. It is adsorbed to the dust is dissolved or mist is absorbed is discharged through the first dust outlet 51 installed at the critical point (CP).

In other words, inside the vortex chamber 10, the gas mixed with the exhaust gas and the compressed gas descends while rotating in a spiral, and the dust and pollutants separated from the gas reaching the critical point CP are separated into the first dust. The exhaust gas is discharged to the outlet 51, and a part of the gas is repeatedly discharged to the first gas outlet 52 installed before the critical point CP of the first lower chamber 14 to purify the exhaust gas supplied. The action will be active.

When the present invention is described in detail based on the accompanying drawings an embodiment applied to the incinerator 200 as follows.

As shown in FIG. 4, the purification apparatus 100 applied to the incinerator 200 has a structure in which the vortex chamber 10 is connected to the exhaust port of the combustor 201 by a connecting pipe 101.

That is, the exhaust gas generated when the waste is combusted from the combustor 201 is supplied into each vortex chamber 10 through a connecting pipe 101 connected to the exhaust gas supply pipe 20 and at the same time, a high pressure generated from a compressor (not shown). Compressed air is injected through the injection nozzle (30).

When a forced vortex is formed inside each vortex chamber 10 by the injection nozzles 30, dust or harmful substances contained in the exhaust gas are separated from the gas and discharged as described above, and are heated at high temperature by heat exchange with compressed air. The exhaust gas is cooled, and a part of the gas from which harmful substances are separated is discharged to the first gas outlet 52, and the above process is repeated.

Therefore, the gas discharged through the vortex chamber 10 is cooled to almost room temperature and is discharged in a state in which pollutants are separated, thereby preventing air pollution.

On the other hand, the second embodiment of the purification device 100 according to the present invention will be described in detail with reference to the accompanying drawings as follows.

As shown in FIG. 5, the purification apparatus 100 according to the second embodiment has a structure in which the discharge unit 50 is installed in two stages.

That is, the discharge part 50 according to the second embodiment includes a first mixed discharge pipe 53 and a first mixed discharge pipe 53 extending downward from a position before the critical point CP of the first lower chamber 14. The second gas outlet 54, which is formed to discharge the gas separated from the dust on the outer peripheral surface of the cylindrical second upper chamber 12A installed at the lower portion of the first lower chamber 14 so that the 53 is located inside, conical A first dust outlet 55 formed to discharge dust separated from the gas at a critical point CP of the second lower chamber 14A formed below the second upper chamber 12A; It consists of the auxiliary vortex chamber 10A.

As such, the discharge unit 50 includes the first auxiliary vortex chamber 10A having the second gas discharge port 54 and the second dust discharge port 55, so that noxious gas and dust contained in the exhaust gas are included. Can be more surely removed, and the exhaust gas cooling effect can be improved.

That is, dust is removed and harmful gas is removed while passing through the vortex chamber 10, and the exhaust gas whose temperature is lowered is extended through the first mixed discharge pipe 53 formed below the first lower chamber 14. As it flows into the first auxiliary vortex chamber 10A which is suddenly expanded, it is secondarily cooled and contaminants are separated.

Therefore, when the discharge part 50 is formed to be similar to the shape of the vortex chamber 10, the cooling effect of the exhaust gas and the removal effect of the contaminants may be improved.

In addition, the third embodiment of the purification apparatus 100 according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 6, the purification apparatus 100 according to the third embodiment has a structure in which the discharge part 50 is installed in three stages.

That is, the discharge part 50 according to the third embodiment includes a third upper chamber 12B and a third upper chamber 12B installed at a position before the critical point CP of the first lower chamber 14. A plurality of auxiliary injection nozzles (30A) radially inclined on the inner wall of the third lower chamber 14B, which is installed below the third upper chamber 12B, and the threshold of the third lower chamber 14B Intermediate vortex chamber 10B having a second mixed discharge pipe 56 extending downward from the position before the point CP, and the third lower chamber 14B such that the second mixed discharge pipe 56 is located therein. A third gas outlet 58 formed at the outer circumferential surface of the cylindrical upper upper chamber 12C installed at the lower part of the upper part 12C to discharge gas separated from dust, and is formed in a conical shape at the lower part of the third upper chamber 12B. The third dust discharge port 59 formed to discharge the dust separated from the gas at the critical point CP of the fourth lower chamber 14C to be installed. It consists of the 2nd auxiliary vortex chamber 10C.

In other words, an intermediate vortex chamber 10B having an auxiliary injection nozzle 30A is installed in the first lower chamber 14 of the vortex chamber 10, and a third lower portion of the intermediate vortex chamber 10B is provided. In the chamber 14B, a second auxiliary vortex chamber 10C having a third gas outlet 58 and a third dust outlet 59 is installed, so that a plurality of vortex chambers 10 are coupled in series in shape. Has a structure. Of course, the purification apparatus 100 according to the present invention may be configured in series or in parallel composed of multiple stages.

As described above, the operation of the purification apparatus 100 in which the intermediate vortex chamber 10B having the auxiliary injection nozzles 30A and the second auxiliary vortex chamber 10C are successively installed in the vortex chamber 10 is as follows. .

When the exhaust gas, which is first cooled in the vortex chamber 10 and the pollutants are separated from each other and removed, flows into the intermediate vortex chamber 10B, compressed air is injected from the auxiliary injection nozzle 30A to form the intermediate vortex chamber. Forced vortex is formed in 10B.

As described above, the exhaust gas and the dust introduced into the intermediate vortex chamber 10B are strongly rotated by the forced vortex again and descend, and in this process, the dust or the harmful gas that cannot be separated is removed. The exhaust gas treated secondly is introduced into the second auxiliary vortex chamber 10C.

The exhaust gas introduced into the second auxiliary vortex chamber 10C is cooled in a tertiary manner while turning, and contaminants such as dust are discharged through the third dust outlet 59, and the exhaust gas from which dust is removed is discharged to the third auxiliary vortex chamber 10C. The process of discharging the harmful substances in the intermediate vortex chamber 10B or the second auxiliary vortex chamber 10C, which is discharged through the gas outlet 58, is the same as the process performed in the vortex chamber 10 described above. .

In this case, a gas discharge blower 90 may be installed in the third gas outlet 58. This is for forcibly discharging the exhaust gas in the second auxiliary vortex chamber 10C. The gas discharge blower 90 may also be installed in the above-described second gas discharge port 54 to exhibit the same function as described above.

The exhaust gas supplied in this way passes through the vortex chamber 10 installed in multiple stages, the intermediate vortex chamber 10B, and the second auxiliary vortex chamber 10C, thereby improving the cooling effect as well as the purification effect.

On the other hand, the fourth embodiment of the discharge unit 50 by the purification device 100 of the present invention as shown in Figure 7 extends downward from the position before the critical point (CP) of the first lower chamber 14 The third mixed discharge pipe 56A and the third mixed discharge pipe 56A formed are installed in the first lower chamber 14 so as to be located therein, and the upper one side of the third mixed discharge pipe 56A is introduced into the third mixed discharge pipe 56A. A fourth gas discharge port 58A is formed to discharge the exhaust gas, and a lower portion thereof includes a third auxiliary vortex chamber 10D in which dust is collected.

As such, when the third auxiliary vortex chamber 10D is installed below the first lower chamber 14, the exhaust gas discharged to the third mixed discharge pipe 56A is discharged through the fourth gas discharge port 58A. Dust emitted to the outside and separated from the exhaust gas is collected at the bottom. In this case, a door may be installed on the bottom or bottom side of the third auxiliary vortex chamber 10D to remove collected dust.

Looking at the action of the outlet 50 according to the fourth embodiment configured as described above, the exhaust gas separated from the dust by the forced vortex inside the vortex chamber 10 is the third mixed discharge pipe (56A) After being introduced into the third auxiliary vortex chamber 10D, the separated dust is collected to fall to the bottom, and the exhaust gas from which the dust is separated is discharged to the outside through the fourth gas outlet 58A.

In this case, when the gas discharge blower 90 is installed in the fourth discharge port 58A, it may help to discharge the introduced exhaust gas.

On the other hand, another embodiment of the injection nozzle 30 and the auxiliary injection nozzle (30A) according to the present invention is as follows. That is, as shown in Figure 7, the water supply hose 70 is installed in each of the injection nozzles (30, 30A) and the compressed air generated from the compressor and the water supplied from the water supply hose 70 is mixed It is configured to be sprayed to each of the injection nozzles (30, 30A).

As such, when high pressure compressed air is injected into each of the injection nozzles 30 and 30A, when water is supplied to each of the injection nozzles 30 and 30A, the supplied water is in the form of fine mist in the vortex chamber 10 ) It is injected into the inside, so that the high-temperature exhaust gas can be cooled more easily, and promote phenomena such as aggregation, dissolution, and adsorption of harmful substances, so that harmful substances can be easily and completely removed. Will be.

In addition, as shown in FIGS. 1 to 3 b or 5 to 6, by installing a reactor 80 into which slaked lime is injected into the exhaust gas supply pipe 20 through which the exhaust gas is supplied, the vortex chamber 10 is provided. In addition, the first auxiliary vortex chamber 10A, the intermediate vortex chamber 10B, the second auxiliary vortex chamber 10C, or the components installed therein may be improved in durability, and the harmful substances contained in the exhaust gas may be primarily Can be removed.

That is, when the reactor 80 into which the slaked lime is added to the exhaust gas supply pipe 20 is installed, a chemical reaction of the harmful gas and the slaked lime contained in the exhaust gas passing through the reactor 80 occurs, thereby causing the gas. The noxious component in this is converted into a harmless component and is purified.

That is, when the harmful gas is purified into a harmless substance by the slaked lime which is a reactant,

Ca (OH) ₂ + 2HCl → CaCl₂ + 2H₂O

Ca (OH) ₂ + SO₂ → CaSO₃ + H₂O

Ca (OH) ₂ + CO₂ → CaCO₃ + H₂O

To be, the harmful gas passing through the reactor 80 is to be able to desalination, desulfurization, decarbonation gas treatment.

Accordingly, the exhaust gas is first purified in the reactor 80 and secondly purified in the vortex chamber 10, thereby improving the purification state of the exhaust gas.

As described above, the exhaust gas discharged from the exhaust gas discharge facility such as the combustor 201 is first purified by the reactor 80, cooled by using the multi-stage vortex chamber 10, and fine solid particles and By separating and removing the harmful gas, as well as the deodorizing action of the exhaust gas, fine solid particles and gaseous contaminants are removed at the same time to prevent air pollution.

The exhaust gas purifying apparatus according to the present invention passes the high-temperature exhaust gas sequentially through the reactor and the vortex chamber in which the forced vortex is generated to remove harmful substances contained in the exhaust gas, deodorize, separate dust, and cool to room temperature. According to the present invention, not only can the durability of the installation be improved by the reactor into which slaked lime is added, but also harmful gases are firstly removed, and the exhaust gas passes through the multistage vortex chamber 10. By doing so, it is possible to remove dust and harmful substances contained in the exhaust gas without installing a separate chemical treatment facility, and by cooling and discharging the high temperature exhaust gas, a useful effect of preventing air pollution is provided.

The invention has been shown and described with respect to a specific preferred embodiment, but the invention is not limited to the embodiment described above, the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Anyone of ordinary skill in the art would be able to make various variations.

Claims (8)

An upper chamber having a first upper chamber 12 closed and formed in a cylindrical shape, a vortex chamber 10 having a first lower chamber 14 formed in a conical shape and installed below the first upper chamber 12; An exhaust gas supply pipe 20 installed in a tangential direction on an upper outer circumferential surface of the first upper chamber 12 to supply hot exhaust gas in a tangential direction; A plurality of injection nozzles 30 are installed to be inclined radially on the inner wall of the first upper chamber 12, and compressed air at room temperature is injected in the supply direction of the exhaust gas so that forced vortex is formed in the vortex chamber 10. ); A hollow tube 40 installed through a central portion of the upper plate of the first upper chamber 12; A discharge part 50 formed in the first lower chamber 14 so that the gas cooled by the forced vortex formed by the compressed air injected from the injection nozzle 30 is separated and discharged; Exhaust gas purification apparatus, characterized in that consisting of. The first dust outlet of claim 1, wherein the discharge unit 50 is installed at a critical point CP of the first lower chamber 14 to discharge dust separated from the exhaust gas by forced vortex. 51; And A first gas outlet (52) installed at a position before the critical point (CP) of the first lower chamber (14) and configured to discharge the cooled gas from dust separated by forced vortex; Exhaust gas purification apparatus, characterized in that consisting of. According to claim 1, wherein the discharge unit 50 comprises a first mixed discharge pipe (53) extending downward from the position before the critical point (CP) of the first lower chamber (14); And A second gas outlet formed to discharge gas separated from dust on the outer circumferential surface of the cylindrical second upper chamber 12A installed below the first lower chamber 14 so that the first mixed discharge pipe 53 is located therein. The second dust outlet 55 is formed in a conical shape so that the dust separated from the gas is discharged to the critical point CP of the second lower chamber 14A installed below the second upper chamber 12A. A first auxiliary vortex chamber (10A) having a); Exhaust gas purification apparatus, characterized in that consisting of. The inner wall of the third upper chamber 12B and the third upper chamber 12B, wherein the discharge part 50 is installed at a position before the critical point CP of the first lower chamber 14. A plurality of auxiliary injection nozzles 30A radially inclined to the third chamber, a third lower chamber 14B installed below the third upper chamber 12B, and a critical point CP of the third lower chamber 14B An intermediate vortex chamber 10B having a second mixed discharge pipe 56 extending downward from the previous position; And The gas separated from the dust is discharged to the outer circumferential surface of the cylindrical fourth upper chamber 12C installed below the third lower chamber 14B so that the second mixed discharge pipe 56 is located therein. The third gas outlet 58 formed so as to have a conical shape is formed so that the dust separated from the gas at the critical point CP of the fourth lower chamber 14C installed below the third upper chamber 12B. A second auxiliary vortex chamber 10C having a third dust outlet 59; Exhaust gas purification apparatus, characterized in that consisting of. The method of claim 1, wherein the discharge portion 50 is a third mixed discharge pipe (56A) extending downward from the position before the critical point (CP) of the first lower chamber (14); The third mixed discharge pipe 56A is installed in the first lower chamber 14 so as to be located therein, and the fourth gas discharge port 58A is disposed at an upper side thereof so that the exhaust gas introduced into the third mixed discharge pipe 56A is discharged. ) Is formed, and the third auxiliary vortex chamber (10D) to collect dust at the bottom; Exhaust gas purification apparatus, characterized in that consisting of. The exhaust gas purifying apparatus according to claim 1, wherein the exhaust gas supply pipe (20) is provided with a reactor (80) into which slaked lime is added. The exhaust gas purification apparatus according to claim 1 or 4, wherein a water supply hose (70) is installed in the injection nozzle (30) and the auxiliary injection nozzle (30A), and compressed air and water are injected. . The gas discharge blower (90) for forcibly discharging the exhaust gas is installed in the second, third and fourth gas outlets (54, 58). Exhaust gas purification system.