KR101992290B1 - Semi dry reactor enhancing SOx removal efficiency by improving a gas flow pattern - Google Patents

Abstract

The semitransparent reaction tower having improved SO.sub.X removal efficiency through improvement of the gas flow pattern according to the present invention includes: a hollow cylindrical main reaction tower 210 vertically installed; A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside; And is connected to the outer cylinder 221 of the double pipe structure 220 to introduce the exhaust gas into the space between the outer cylinder 221 and the inner cylinder 223 to receive the exhaust gas discharged from the air pollution material discharge facility, A gas inlet duct 240 for introducing into the structure 220; The main reaction tower 210 has a plurality of injection nozzles disposed on the outer circumferential surface of the main reaction tower 210 in the circumferential direction and spaced apart from each other by a predetermined distance. Slurry supply means provided so as to spray a liquid in the form of a slurry toward the central portion; A horizontal discharge guide pipe 250 extending transversely from the side of the upper end of the main reaction tower 210; And a gas discharge duct 260 extending vertically downward from an end of the horizontal discharge guide pipe 250.

Description

[0002] Semi-dry reactor enhancing SOx removal efficiency by improving gas flow pattern [

The present invention relates to a semitransparent reaction column having improved SO.sub.X removal efficiency through improvement of a gas flow pattern. More particularly, the present invention relates to an apparatus for rectifying an exhaust gas flowing into a semi-dry reaction column to uniformly distribute the density of the exhaust gas across the cross- , The injection nozzles for spraying the absorbent slurry to the flue gas are installed along the outer circumferential surface of the reaction tower and the length of the injection nozzles projected to the inside of the reaction tower is set to be less than 10 cm even when the maximum length is reached so that the reaction between the absorbent slurry and the sulfur oxide It is possible to set the injection nozzles in multiple stages in the height direction of the reaction tower by preventing the injection nozzles from being contaminated by the solids produced by the exhaust gas, thereby maximizing the contact time, contact frequency and mixing effect between the exhaust gas and the absorbent slurry, Removal efficiency of cargo can be dramatically improved by absorption and drying. To a semi-dry reaction tower.

The gases emitted from glass melting furnaces, waste incinerators, power plants and other industrial facilities contain hazardous substances such as sulfur oxides (SOx), hydrogen chloride (HCl), nitrogen oxides (NOx), hydrogen fluoride (HF) In order to prevent contamination, it is required to remove these harmful substances contained in the exhaust gas and to discharge the exhaust gas to the atmosphere.

As a method for treating such a harmful gas, a wet method in which an aqueous solution or slurry containing an alkaline absorbent such as slaked lime, quicklime or dolomite is brought into direct contact with exhaust gas cooled at a low temperature and removed by a neutralization reaction, And a dry method in which the absorbent powder is directly injected into an exhaust gas to be removed.

However, the above-mentioned wet method requires a facility for treating wastewater containing a reaction product salt or heavy metal generated by a neutralization reaction while having a high removal rate of noxious gas, and a white smoke ), There is a problem that the equipment cost and the operating cost are large.

For this reason, in recent years, a semi-dry process method is mainly used instead of a wet process, and a conventional exhaust gas processing device equipped with a semi-dry type reactor has a structure in which an alkali material is sprayed from the upper part to the lower part of the reactor by the injection nozzle. The sprayed alkali material is collected in the form of fly ash from a non-acid dust collector such as an electrostatic precipitator at the downstream of the semi-cylindrical reactor, a cyclone, and a bag filter, and is discharged and discarded as it is.

1 is a block diagram schematically illustrating a desulfurization process for removing sulfur oxides generated in the glass melting furnace 1, which is one of the air pollutant discharge facilities. The glass melting furnace 1 refers to a furnace in which a glass raw material is melted by burning a fuel in a container for holding a glass raw material and melting the glass raw material. Minerals such as limestone, pyrophyllite, silica or silica are used as raw materials of the glass, Since fossil fuels such as oil and gas are burned, many air pollutants such as sulfur oxides, nitrogen oxides, and hydrogen fluoride are generated.

1, in the glass melting furnace 1 of a glass manufacturing plant, glass raw materials are dissolved to produce a liquid glass, which is then subjected to a glass product manufacturing process 2, such as molding, cooling, The flue gas discharged from the glass melting furnace 1 is subjected to a purification process such as the removal of sulfur oxides by the desulfurization facilities 4 and 4 ' (5) to the atmosphere. The desulfurization equipment applied to the glass melting furnace 1 is composed of a first desulfurization facility 4 as a desulfurization process using sodium hydroxide (NaOH) and a second desulfurization equipment 4 as a desulfurization process depending on what is used as an alkaline absorbent for absorbing and neutralizing sulfur oxides. And a second desulfurization facility 4 'as a desulfurization process using the same. In an air pollutant discharge facility, both a sodium hydroxide (NaOH) process and a lime process may be applied at the same time, or only one of these processes may be applied.

Semi-dry reactors (4a, 4a ') for use in the desulfurization process of atmospheric pollutant gases are generally referred to by several different names depending on the field to which they are applied. For example, in the incinerator field, a semi-dry reactor ) Or absorber, which is referred to as a stabilizer in the glass manufacturing process and a flue gas desulfurizer (FGD) in the plant plant sector.

1, the first desulfurization unit 4 as a sodium hydroxide (NaOH) process is formed by a combination of a semi-dry type reaction tower 4a and an electrostatic precipitator 4b. When sodium hydroxide is used as an absorbent, It is difficult to use because it takes a lot of differential pressure. When the neutralization reaction in the first desulfurization equipment 4 is represented by the chemical formula,

SO ₂ + ₂ NaOH ---> Na ₂ SO ₃ + H ₂ O

SO ₃ + ₂ NaOH ---> Na ₂ SO ₄ + H ₂ O

_{Na 2 SO 3 + SO 3 +} H 2 O ---> 2NaHSO 3

NaHSO ₃ + NaOH ---> Na ₂ SO ₃ + H ₂ O

Respectively,

At this time,

Na ₂ SO ₃ +1/2 O ₂ ---> Na ₂ SO ₄

Lt; / RTI >

The second desulfurization facility 4 'as a lime process shown in FIG. 1 is formed by a combination of a semi-dry type reaction tower 4a' and a bag filter 4c. In this case, If the bag filter is used as a dust collecting device, high efficiency can be obtained.

If the neutralization reaction in the second desulfurization unit 4 'is represented by the chemical formula,

SO ₂ + Ca (OH) 2 ---> CaSO ₃ + H ₂ O

SO ₃ + Ca (OH) 2 ---> CaSO ₄ + H ₂ O

Respectively,

At this time,

Ca ₂ SO ₃ +1 / ₂ O ₂ ---> CaSO ₄

.

FIG. 2 is a cross-sectional view showing the construction of the conventional semi-automatic reaction column 10, and FIG. 3 is a perspective view of the conventional semi-automatic reaction column 10 shown in FIG. 2 when viewed from below .

The main part of the semi-automatic reaction tower 10 is integrally connected to the main part of the main reaction tower 11 which is formed in a cylindrical shape and has an enlarged tube part 14 whose diameter is gradually narrowed toward the upper part. And a gas inflow duct 12 is coupled to the other end of the round bending tube portion 13 in a vertical direction. A cone-shaped lower hopper 16 is formed at the lower end of the main reaction tower 11 so that the diameter of the lower reaction vessel is reduced toward the lower side. The exhaust gas flowing downward along the inner space of the main reaction tower 11 is transferred to the electrostatic precipitator or the bag filter at the downstream stage through the gas discharge duct 15.

The flue gas generated in the air pollutant discharge facility and entering the conventional semi-automatic reaction tower 10 is introduced into the expansion pipe portion 14 through the round bending pipe portion 13 while rising along the gas inlet duct 12, The absorbent slurry is sprayed in the form of fine particles from the injection nozzle 31 of the absorbent slurry supply means 30 provided on the top portion 11 so that the absorbent slurry comes into contact with the exhaust gas. The absorbent slurry is a solution in which sodium hydroxide (NaOH) or calcium hydroxide (Ca (OH) ₂ ) is mixed and suspended in water to neutralize and oxidize sulfur oxides in the exhaust gas to form sodium sulfate (Na ₂ SO ₄ ) ₄ ). The sodium sulfate or gypsum solids produced in the flue gas stream are removed by electrostatic precipitators or bag filters installed at the rear end of the semi-dry type reaction tower 10 together with other dusts.

Referring to FIG. 2, the conventional semi-dry type reaction tower 10 is a top inflow type in which the exhaust gas flows down from the upper part of the reaction tower. In this case, after the exhaust gas comes into contact with the absorbent, There is a disadvantage that the absorbent slurry feeding means 30 must be installed at the upper part of the reaction tower in order to secure a sufficient reaction time required for the reaction of the adsorbent slurry. The facilities of the slurry supply means 30 including the injection nozzle 31 and the slurry supply pipe are installed at a height of several tens meters from the ground, considering that the height of the semi-dry type reaction tower 10 is usually 20 to 40 m In order to maintain the slurry supply means 30, workers have to work on the work table 40 having a height of several tens of meters to perform work on the site. Therefore, maintenance costs such as labor costs are high, There was a disadvantage that a disaster was likely to occur.

In the conventional semitransparent reaction column 10, the curved shape of the round bending tube portion 13 connected to the gas inlet duct 12 is substantially circular and gentle. As the exhaust gas passes through the round bending tube portion 13 There is a problem that the centrifugal force is naturally received and biased only to the outside of the round bending tube portion 14. Round bent tubular portion 14 outside the portion in (e. G. Fig. X ₁ point 2) inside only flows through the exhaust gas is concentrated portion when in, the lean exhaust gas conditions (e. G. X ₂ points in Fig. 2), extended The biased current flows in only one side (that is, only the right side portions of the expansion tube portion 14 and the main reaction tower portion 11 in FIG. 2) in the tube portion 14 and the main reaction tower portion 11 thereunder The absorbent slurry sprayed from the injection nozzle 31 of the slurry supply means 30 does not contact the flue gas evenly and comes into contact with the flue gas only in one portion and the absorbent agent is wasted in the remaining portion.

In addition, the injection nozzle 31 used in the conventional semitransparent reaction column 10 of FIG. 2 is provided such that the slurry supply pipe extends directly to the inside of the main reaction tower 11, and the injection nozzle 31 The slurry supply pipe and the spray nozzle 31 are often contaminated and damaged by dust and contaminants in the exhaust gas. If the spray nozzle facility is installed in multiple stages It is impossible to install the spray nozzle equipment in a multistage manner because the spray nozzle and the supply piping facilities located at the bottom are contaminated by the slurry liquid sprayed from the spray nozzle at the upper side.

2, since the spray nozzles 31 for spraying the slurry can not be installed at various stages along the height direction, they must be installed only in one stage, There is a disadvantage in that it is impossible to provide various and continuous opportunities for the sulfur oxide in the absorbent slurry to come into contact with each other.

2, reference numeral 50 denotes a gas inlet duct support fixing means for supporting and fixing the gas inlet duct 12 to the main reaction tower 11, reference numeral 51 denotes an inner wall surface of the main reaction tower 11, Or a first supporting beam connected to the first reinforcing ring portion 57a fixed to the outer wall surface in a ring shape and 53 is a portion of the inner wall surface of the main reaction tower portion 11 or below the first reinforcing ring portion 57a And a second reinforcing beam 54 connected to the second reinforcing ring portion 57b fixed to the outer wall surface and 54 a second reinforcing beam connecting the first supporting beam 51 and the first reinforcing beam 53. [ Reference numeral 55a denotes a first connecting link for connecting the first reinforcing beam 53 and the gas inlet duct fixing means 50 and 55b denotes a connecting link between the first supporting beam 51 and the second reinforcing beam 54 And 55c is a third connection link connecting between the second reinforcing beam 54 and the first reinforcing beam 53. The second connecting link 55c is a third connecting link connecting the second reinforcing beam 54 and the first reinforcing beam 53. [

2, a work table 40 is installed at an upper end of the semi-dry type reaction tower 10 so that workers can access the slurry feed means 30. The work table 40 is supported by a support structure 42, And a safety fence 41 is provided on the work table 40 for preventing a fall accident.

On the other hand, a support table 20 is provided at the lower end of the main reaction tower 11, a semi-dry reaction tower 10 is supported on the ground G and liquid and solids remaining in the hopper are taken out from the lower end of the lower hopper 16 A discharge port 16a is provided. A plurality of reinforcing plates 60 are coupled between the lower end of the main reaction tower 11 and the support 20 to reinforce the connection between the main reaction tower 11 and the support 20, The support beams 21 are also coupled in the horizontal direction to increase the rigidity.

3, reference numeral 40 'denotes a work table provided on the upper part of the support 20.

4 schematically shows the installation state of the absorber slurry supply means 30 and the distribution range of the absorbent slurry sprayed from the slurry supply means 30 in the transverse section of the semi-dry type reaction tower 10 cut along the line AA in FIG. will be. FIG. 4 illustrates a case where four slurry feeding means 30 are provided in the circumferential direction along the outer peripheral surface of the main reaction tower 11 in the form of ice.

4, the slurry supply means 30 used in the conventional semitransparent reaction column 10 has the slurry supply pipe 32 substantially in the inner space 19 of the reaction tower, The slurry sprayed from the spray nozzle 31 is spread widely to form a circular slurry spraying area 33a. A portion 33b in which the slurry ejection regions 33a made by spraying the slurry from one injection nozzle 31 overlap each other by a plurality of injection nozzles also occurs.

As described above, the conventional semitransparent reaction column 10 (FIG. 2 and FIG. 3) in the downflow type has a structure in which the injection nozzle 31 of the absorbent slurry feeding means is deeply inserted into the inner space of the reaction column, And because of the possibility of failure, it is not possible to install the injection nozzles in multiple stages along the height direction, and due to the design defect of the rounded bending tube portion 13, the exhaust gas is not uniformly distributed in the reaction tower There is a problem that the vapor / liquid contact reaction with the absorbent slurry is poor. Due to the low drift rate and low efficiency of the slurry spraying effect, the conventional downflow type semi-dry type reaction tower has a disadvantage that the absorption effect of sulfur oxide is lower than expected and the consumption of the absorbent is excessive. In addition, the conventional semitransparent reaction tower has a problem that the spray nozzle is located at a high altitude of several tens of meters in the structure itself, so that it is difficult for the operator to approach and the maintenance risk is high because of the high risk of the operation.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is an improvement of the entire structure of a semitransparent reaction column to fundamentally change the flow pattern of the exhaust gas passing through the inside of the reaction tower so that the absorbent slurry efficiently contacts the exhaust gas efficiently, And to provide a novel semi-automatic reaction tower capable of maximizing the reaction rate.

In order to overcome the above problems, the present invention is a method of improving the structure of an injection nozzle used in a semitransparent reaction column by the structure of an air atomizer nozzle so that the absorbent slurry has a diameter of several tens to several hundred microns The spray nozzle is sprayed in a droplet state by spreading the spray nozzle in a horizontally long shape and a narrow shape in the longitudinal direction so as to spread horizontally in a fan shape so that the absorbent slurry is sprayed in a droplet state, The injection nozzle is installed in close contact with the inner wall surface of the reaction tower and the projecting length is shortened to several centimeters to solve the contamination problem caused by the exhaust gas and slurry so that the injection nozzles can be installed in multiple stages along the height direction, A new type of semi-dry type in which the gas-liquid contact frequency between the flue gas and the absorbent slurry is drastically increased The purpose is to provide a eungtap.

In the present invention, the flue gas flowing through the inside of the semi-dry type reaction column is caused to strike against the baffle plate, or rectified, or a part of the reaction column is made into a double pipe structure, And to provide a new type semi-dry type reaction tower in which the possibility of contact with the absorbent slurry is increased.

In conclusion, the present invention maximizes the contact time, contact frequency, and mixing effect between the flue gas discharged from an air pollutant discharge facility such as a glass melting furnace and the absorbent slurry sprayed in the semitransparent reaction tower, thereby absorbing, drying and neutralizing sulfur oxides in the exhaust gas And it is an object of the present invention to provide a new semi-dry type reaction tower capable of remarkably increasing sulfur oxide removal efficiency.

In order to achieve the above object, the present invention provides a semitransparent reaction tower having improved SO.sub.X removal efficiency through improvement of a gas flow pattern provided by the present invention, comprising: a main reaction tower having a cylindrical hollow space installed in a vertical direction, (110); An upper inlet pipe (140) extending further from the main reaction tower (110) and having a smaller diameter than the main reaction tower (110); The inside of the upper inflow pipe 140 and the main reaction top 110 are communicated with each other and the diameter gradually increases as they descend downward. An expansion tube portion 150 having the same diameter as the main reaction tower portion 110 at a lower end thereof; The gas is introduced into the upper inflow pipe 140 and flows into a glass melting furnace, a coal plant, a boiler, and the like, and is connected to the upper inflow pipe 140 at a first angle and extended in a downward direction. A gas inlet duct 130 for receiving and exhausting the exhaust gas discharged from any one of the air pollutant discharge facilities including the incinerator to the upper inflow pipe 140; A plurality of extension tube portions 150 are provided on the outer circumferential surface of the extension tube portion 150 in the lateral direction and spaced apart from each other at a second interval, A slurry supply means 300 installed to spray a liquid in the form of a slurry toward a central portion of the expansion tube portion 150 with respect to a plane in the case of cutting in a direction of the extension tube portion 150; A lower hopper 170 installed at a lower end of the main reaction tower 110 and formed in the shape of a cone whose tip is directed downward; And a gas discharge duct 160 installed in communication with the main reaction tower 110 at a position above the position of the lower hopper 170 and discharging gas in the main reaction tower 110 to the outside And one or more baffle plates 141 are horizontally protruded on the inner wall surface of the upper inflow pipe 140. The installation position of the baffle plate 141 is a position where the gas inlet duct 130 is installed, The exhaust gas flowing into the upper inflow pipe 140 through the gas inflow duct 130 strikes the baffle plate 141 to generate a turbulent flow so that the horizontal cross section of the upper inflow pipe 140 The slurry supply means 300 sprays an alkaline slurry capable of absorbing the sulfur oxide gas in the flue gas into the inside of the expansion pipe portion 150, The sulfur oxides in the exhaust gas are converted into dry solids by contacting the alkaline slurry in the expansion pipe section 150. The exhaust gas containing the dried solids is discharged to the outside of the main reaction tower 110 through the gas exhaust duct 160 And is discharged.

In order to achieve the above object, the present invention provides a semi-dry type reaction tower in which the SOx removal efficiency is improved by improving the gas flow pattern provided by the present invention, wherein the alkaline slurry is a suspension in which sodium hydroxide (NaOH) is mixed with water at a concentration of 0.1 to 10% . Alternatively, the alkaline slurry is characterized by being a suspension in which slaked lime or quicklime is mixed with water at a concentration of 5 to 20% by weight.

In order to achieve the above object, the slurry supply means 300 of the semitransparent reaction column having improved SOx removal efficiency through the improvement of the gas flow pattern provided by the present invention, And a plurality of spray nozzles (not shown) installed so as to protrude by 3 to 10 cm on the inner wall surface of the extension tube portion 150 and spray the alkaline slurry in the form of mist toward the inner space of the extension tube portion 150 311); And a slurry supply pipe (330) connected to the injection nozzles (311) and supplying an alkaline absorbent slurry delivered from the slurry tank (183) to the injection nozzles (311), respectively, The nozzle hole 311f of the spray nozzle 311 is elongated in the horizontal direction and is formed in a flat shape in the vertical direction so that the spray liquid sprayed from the spray nozzle 311 is sprayed at an angle of 70 to 80 ° in the horizontal direction Are sprayed in a fan shape and sprayed in a vertical direction at an angle of 10 to 20 degrees.

According to another aspect of the present invention, the injection nozzle 31 of the semitransparent reaction column having improved SOx removal efficiency through improvement of the gas flow pattern has a slurry passage 311a-4 along the longitudinal direction of the central axis And a nozzle hole 311f is formed in a front portion of the nozzle hole 311f. The nozzle hole 311f communicates with the slurry passage 311a-4. A male screw portion formed on an outer periphery of a front portion side of the nozzle body 311a; A flange nut 311b formed on the inner wall of the nozzle body 311a and coupled to the nozzle body 311a in such a manner as to surround the outer periphery of the front portion of the nozzle body 311a; A compact spherical washer 311c coupled to a front portion of the nozzle body 311a by being interposed between the flange nut 311b and the front portion of the nozzle body 311a; A front cap 311d coupled to the compact spherical washer 311c and having a through hole at a central portion thereof; And one or more air discharge holes (311a-314d) formed at the upper and lower portions of the nozzle hole (311f), respectively, formed in the nozzle body (311a) at an angle of 25 to 45 degrees with respect to the slurry passage And an air passage 311h communicated with the slurry supply pipe 330. The nozzle body 311a is coupled to the slurry supply pipe 330. [

In order to accomplish the above object, a semi-dry type reaction tower having improved SO.sub.X removal efficiency through improvement of a gas flow pattern provided by a second embodiment of the present invention is a semi-dry type reaction tower which is vertically installed, A main reaction tower part 210 having an empty space; A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside; A lower support 230 installed at a lower portion of the dual pipe structure 220 and fixed to the ground G to support the weight of the main reaction tower 210 and the dual pipe structure 220; And is connected to the outer cylinder 221 of the double pipe structure 220 to introduce the exhaust gas into the space between the outer cylinder 221 and the inner cylinder 223 and to perform atmospheric pollution including glass melting furnaces, coal plants, boilers, A gas inlet duct 240 for receiving the flue gas discharged from any of the material discharge facilities and introducing the flue gas into the dual pipe structure 220; A plurality of the main reaction tower parts 210 are provided on the outer peripheral surface of the main reaction tower part 210 in the circumferential direction and spaced apart from each other at a third interval, Slurry supply means provided so as to spray a liquid in the form of a slurry toward the portion; A horizontal discharge guide pipe 250 extending laterally outward from the side of the upper end of the main reaction tower 210; And a gas discharge duct (260) extending vertically downward from an end of the horizontal discharge guide pipe (250), wherein the slurry supply means supplies an alkaline slurry capable of absorbing the sulfur oxide gas in the flue gas to the main reaction tower And the sulfur oxides in the flue gas are converted into dry solids by contacting the alkaline slurry in the inner space of the main reaction tower 210. The flue gas containing the dried solids is introduced into the gas discharge duct 260 to the outside of the main reaction tower 210.

At this time, the double pipe structure 220 of the semi-dry type reaction column having improved SOx removal efficiency through improvement of the gas flow pattern according to the present invention is characterized in that the main reaction bed portion 210 has the outer cylinder 221 formed continuously and downwardly in the same cross- ; The outer tube 221 is disposed in an inner space of the outer tube 221 and has a diameter 0.3 to 0.7 times the diameter of the outer tube 221 and is disposed concentrically with the outer tube 221, An inner tube 223 having a shorter length and an upper end located at a lower height than the upper end of the outer tube 221; The diameter of the lower end portion is the same as the diameter of the inner cylinder 223 and the diameter of the upper end portion is equal to the diameter of the outer cylinder 221 so that the upper end of the inner cylinder 223 is moved upward A hollow intermediate expanding tube portion 222 having a shape gradually increasing in diameter; And the lower end edge portion of the inner cylinder 223 is inclined at an angle of 15 to 60 degrees outward with respect to the outer circumferential surface of the inner cylinder 223 as a whole. Thus, the circumferential length gradually increases as it goes down a rim enlargement section 224; And a lower end of the rim expanding portion 224 is connected to the lower end of the rim expanding portion 224. The lower end of the rim expanding portion 224 is connected to the inner pipe 223, And the gas inlet duct 240 is directly connected to the outer cylinder 221 and is not connected to the inner cylinder 223, The exhaust gas flowing into the turbulent swinging space 225 through the opening 240 enters the inner space of the inner tube 223 only through the gap between the lower end of the rim expanding portion 224 and the bottom surface of the dual pipe structure portion 220 .

In addition, the semi-dry type reactor having improved SOx removal efficiency through improvement of the gas flow pattern according to the second embodiment of the present invention is installed on the gas inlet duct 240, A lime powder feed pipe (245) for spraying the gas in the flowing gas; And the lime powder inlet pipe 245 and the end of the gas inlet duct 240 so that the slaked lime powder is dispersed evenly in the exhaust gas before the flue gas enters the outer cylinder 221 of the dual pipe structure 220 And a gas mixer (243), wherein sulfur oxides in the flue gas are absorbed by the slaked flour and converted into gypsum solids.

In order to achieve the above object, the present invention provides a semitransparent reaction tower having improved SO.sub.X removal efficiency through improvement of a gas flow pattern provided by the present invention, comprising: a main reaction tower having a cylindrical hollow space installed in a vertical direction, (210); A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside; A lower support 230 installed at a lower portion of the dual pipe structure 220 and fixed to the ground G to support the weight of the main reaction tower 210 and the dual pipe structure 220; (Outer tube 221 of the double pipe structure part 220) to introduce the exhaust gas into the space between the outer tube 221 and the inner tube 223, and to discharge the exhaust gas into the space including the glass melting furnace, coal plant, boiler, A gas inlet duct 240 for receiving the flue gas discharged from any one of the pollutant discharge facilities and introducing the flue gas into the dual pipe structure 220; A plurality of the main reaction tower units 210 are disposed on the outer peripheral surface of the main reaction tower unit 210 in the circumferential direction and spaced apart from each other at a fifth interval, Water supply means for spraying water toward the portion; An inclined discharge guide pipe 255 connected to a side surface of an upper end of the main reaction tower unit 210 and extending downwardly at an angle of 20 to 70 ° with respect to a vertical direction; A gas exhaust duct 260 extending vertically downward from an end of the incline discharge guide pipe 255; A lime powder inlet pipe 245 installed on the gas inlet duct 240 for spraying the powdered slaked lime in the gas flowing in the gas inlet duct 240; And the lime powder inlet pipe 245 and the end of the gas inlet duct 240 so that the slaked lime powder is dispersed evenly in the exhaust gas before the flue gas enters the outer cylinder 221 of the dual pipe structure 220 And a gas mixer 243. The sulfur oxides in the flue gas flowing in the gas inlet duct 240 are absorbed by the slaked flour and converted into gypsum solids and the flue gas containing the gypsum solids passes through the gas discharge duct 260 And is discharged to the outside of the main reaction tower part 210 through the through hole.

In order to achieve the above object, a semitransparent reaction tower having improved SOx removal efficiency through improvement of a gas flow pattern provided according to a third embodiment of the present invention includes a cylindrical hollow space A main reaction tower part 210 having a main reaction part 210; A lower hopper 270 installed at a lower end of the main reaction tower 210 and formed in a cone shape having a downward pointed end; Is installed in communication with the main reaction tower 210 at a point above the lower hopper 270 and is discharged from any one of air pollution material discharge facilities including a glass melting furnace, a coal plant, a boiler, and an incinerator A gas inlet duct 240 for receiving the flue gas and guiding the flue gas to the inner space of the main reaction tower 210; A plurality of main reaction tower units 210 are installed in the circumferential direction on the outer circumferential surface of the main reaction tower unit 210 located above the portion where the main reaction tower unit 210 and the gas inlet duct 240 are coupled, Slurry supply means provided so as to be spaced apart from each other at a sixth interval and capable of spraying a liquid in the form of a slurry toward a central portion of the main reaction tower portion 210; A gas exhaust duct 260 extending laterally outward from a side of an upper end of the main reaction tower 210; A support table 20 for supporting the main reaction tower 210 with respect to the paper surface G by having an upper end coupled to a lower portion of the main reaction tower 210 and a lower end fixed to the paper surface G; And a worktable (40) installed near a position where the slurry supply means of the main reaction tower (210) is installed, and providing a footrest so that an operator can access the slurry supply means for installation and maintenance work And the slurry supply means is installed at positions spaced apart from each other along the circumference of the main reaction tower 210 and is installed on the inner wall surface of the main reaction tower 210 by 3 to 10 cm A plurality of injection nozzles 311 and 312 for spraying the alkaline slurry in the form of mist in the inner space of the main reaction tower 210; And a slurry supply pipe which is respectively connected to the spray nozzles 311 and 312 and supplies an alkaline absorbent slurry delivered from the slurry tank 183 to the spray nozzles 311 and 312, The nozzle holes 311f of the nozzles 311 and 312 are elongated in the horizontal direction and are formed in a flat shape in the vertical direction so that the slurry spray liquid ejected from the injection nozzles 311 and 312 is horizontally 70 - The gas discharge duct 260 is connected to the electrostatic precipitator or the bag filter, and the gas discharge duct 260 is connected to the electrostatic precipitator or the bag filter, The exhaust gas discharged through the exhaust duct 260 is characterized in that it is subjected to a process of removing dust and solids afterward by the electrostatic precipitator or the bag filter.

The semitransparent reaction tower having improved SO.sub.X removal efficiency through improvement of the gas flow pattern according to the present invention can be obtained by completely improving the structure of the conventional semitransparent reaction column to fundamentally change the flow pattern of the exhaust gas passing through the inside of the reaction column, So that it is possible to maximize the removal efficiency of sulfur oxides in the exhaust gas.

In addition, the semi-dry type reaction tower having improved SOx removal efficiency through improvement of the gas flow pattern according to the present invention is improved in the structure of the injection nozzle by the structure of the air nozzle so that the absorbent slurry has a thickness of several tens to several hundred microns And the spray nozzle is formed to have a long hole in the horizontal direction and a narrow hole in the vertical direction so as to spread horizontally in a fan shape so that the absorbent slurry is in a droplet state The injection nozzle is installed in close contact with the inner wall surface of the reaction tower and the protruding length is shortened to about several centimeters to solve the contamination problem caused by the exhaust gas and slurry so that the injection nozzles can be installed in multiple stages along the height direction There is an advantage to be able to. As a result, the present invention has an advantage of increasing the removal efficiency of sulfur oxides by drastically increasing the gas-liquid contact frequency between the exhaust gas and the absorbent slurry.

In the semi-dry type reactor according to the present invention, a baffle plate is protruded on a passage through which an exhaust gas flows from above, and the exhaust gas is rectified by colliding with the baffle plate, Density of the adsorbent slurry can be increased to increase the reaction efficiency by contacting the absorbent slurry.

Further, in the case of designing the semitransparent reaction tower in a bottom inflow manner, the present invention makes the exhaust gas inlet portion into a double tube structure of the outer tube and the inner tube, and induces the gas to swing and cause turbulence in the double tube structure Reducing the flow rate of the flue gas and inducing a uniform distribution of the flue gas so that the flue gas meets the fine slurry droplets sprayed by the spray nozzle during the ascent along the reaction tower to maximize the chances of contact between the flue gas and the sorbent slurry, Is maximized.

1 is a block diagram schematically illustrating a desulfurization process for removing sulfur oxides as an air pollutant generated in the glass melting furnace 1.
2 is a cross-sectional view showing a structure of a conventional semi-dry reactor (SDR).
FIG. 3 is a perspective view of the conventional semi-automatic reaction tower 10 shown in FIG. 2 when viewed from below.
4 schematically shows the installation state of the absorber slurry supply means 30 and the distribution range of the absorbent slurry sprayed from the slurry supply means 30 in the transverse section of the semi-dry type reaction tower 10 cut along the line AA in FIG. will be.
FIG. 5 is a top view illustrating the structure of a semi-dry type reaction vessel 100 in which the SOx removal efficiency is improved through improvement of the gas flow pattern according to the first embodiment of the present invention.
FIG. 6 also shows the structure of the absorbent slurry pretreatment apparatus 180 for feeding the absorbent slurry 183c to the absorbent slurry feeding means 300 of the semi-dry type reaction column 100 shown in FIG.
7 is a schematic view illustrating an exhaust gas flow and the injection nozzles 310, 311, and 311 in the expansion tube 150, the upper inlet pipe 140, and the gas inlet duct 130, which are located on the upper part of the semi- 312 and 313, respectively, of the absorbent slurry.
8 is a simulation showing the density distribution of the flue gas in the cross sectional area when the extension pipe portion 150 of the semi-dry type reaction column 100 is cut along the BB line of FIG. 5, wherein FIG. 5 shows a state in which the baffle plate 141 is not installed in the inflow pipe 140 and the baffle plate 141 is installed in the upper inflow pipe 140 as shown in FIG.
9 is a cross-sectional view of the enlarged tube portion 150 of the semi-dry type reaction vessel 100 taken along the CC line of FIG. 5 in the transverse direction. The spray nozzles 312 and 310 are overlapped with the sprayed sprayed regions 340. The sprayed nozzles 312 and the sprayed nozzles 312 shown in FIG. Fig. <B> illustrates a state where 30 injection nozzles 310 are installed.
FIG. 10 shows the structure of the semi-automatic reaction tower 100 according to the first embodiment of the present invention and the horizontal wet electrostatic precipitator 600 provided at the rear end thereof.
11 shows the detailed construction of the slurry supplying means 300 used in the semitransparent reaction column 100 according to the first embodiment of the present invention. The slurry supplying means 300 is a state in which the spraying nozzle 311 is coupled to the slurry supplying pipe 330 / RTI &gt;
FIG. 12 is a front view of the injection nozzle 311 of FIG. 11 viewed from the direction of d.
13 is a cross-sectional view of the injection nozzle 311 shown in Figs. 11 and 12 cut along the line EE of Fig.
14 is a cross-sectional view of the injection nozzle 311 of FIG. 13 in a state where the slurry supply pipe 330 is coupled with the slurry passage 311a-4 provided at the center of the injection nozzle 311 and the nozzle hole 311f It shows a scene where the absorbent slurry is sprayed in the form of fine droplets.
15 is a cross-sectional view of a semitransparent reaction column 200 having improved SOx removal efficiency through improvement of a gas flow pattern according to a second embodiment of the present invention.
FIG. 16 is a schematic perspective view of the semi-dry type reaction vessel 200 shown in FIG. 15, and explains a gas flow system inside the semi-dry type reaction bed 200. FIG.
17 shows a state in which the semitransparent reaction column 200 shown in FIG. 15 is cut along the FF line, and a gas flow system inside the semitone-type reaction column 200 will be described.
FIGS. 18 and 19 show a modification of the second embodiment of the present invention, in which a lime powder feed pipe 245 is installed in the gas inlet duct 240.
20 and 21 show a state in which the semitransparent reaction column 200 shown in FIG. 15 is cut along the GG line. FIG. 20 shows a state in which a plurality of FIG. 21 shows a slurry spraying state when all of the plurality of spraying nozzles 311 spray the slurry by simulating the spraying area 340 of any one of the spraying nozzles 311.
FIG. 22 shows an example in which the second embodiment of the present invention is further modified. A slope discharge guide pipe 255 is provided at the upper end of the semi-dry reaction tower 200 to prevent dust from accumulating on the gas discharge pipe line. do.
23 is a whole mouth cross-sectional view showing the structure of a semitransparent reaction bed 200b having improved SOx removal efficiency through improvement of a gas flow pattern according to the third embodiment of the present invention.
Fig. 24 shows a gas flow line 501 in the semi-automatic reaction column 200b of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a top view illustrating the structure of a semi-dry type reaction vessel 100 in which the SOx removal efficiency is improved through improvement of the gas flow pattern according to the first embodiment of the present invention. Referring to FIG. 5, the semitransparent reaction column 100 according to the first embodiment of the present invention is substantially similar to the conventional semitransparent reaction column 10 (see FIGS. 2 to 4) The upper part of the main reaction tower 110 is connected to the upper part of the main reaction tower 110 so that the upper inlet pipe 140 and the gas inlet duct 130 meet at a sudden angle of 20 to 60 °, 311, 312, and 313 are formed in three stages in the expansion tube portion 150, and the expansion tube portion 150 is formed in the extension tube portion 150, And the injection nozzles 310, 311, 312, and 313 are installed so as to be plugged on the outer circumferential surface of the expansion tube portion 150 without deeply entering the inner space of the expansion tube portion 150, The length of the exposed portion of the inside of the expansion tube portion 150 is very small, about several centimeters The major features such as points of interest are conventional semi-dry reaction column can be described as the difference between 10 (see Fig. 2).

5, the main reaction tower 110 of the semitransparent reaction tower 100 is installed upright in a direction perpendicular to the ground G, and the support 20 supports the lower part of the main reaction tower 110 at this time. There is a cylindrical hollow space through which the gas can flow in the main reaction tower unit 110. The exhaust gas generated in the air pollution material discharge facility such as a glass melting furnace is connected to the vertical connecting duct 120 connected in the vertical direction, And is introduced into the side portion of the upper inflow pipe 140 through the gas inlet duct 130 disposed at an angle of 20 to 60 degrees with respect to the direction of the gas flow. The upper inlet pipe 140 may have a diameter smaller than the diameter of the main reaction tower 110 and may have a diameter of 0.3 to 0.7 times the diameter of the main reaction tower 110, for example.

The side portion of the upper inflow pipe 140 and the portion where the inclined gas inflow duct 130 is connected are partially separated from the upper end portion of the upper inflow pipe 140 to penetrate through the gas inflow duct 130 So that the flue gas hits the upper lid plate 142 of the upper inflow pipe 140 to cause turbulence. That is, the center of the pipe connecting portion 131 as the portion to which the gas inlet duct 130 is connected is spaced from the position of the upper lid plate 142 by about 2 to 4 m at the side of the upper inflow pipe 140, The exhaust gas passing through the gas inlet duct 130 can be surely separated from the upper lid plate 142 by a distance of 1 to 2 m from the upper lid plate 142 at the highest point where the duct 130 meets the upper inlet pipe 140 After a strong hit, the gas fl ows bouncing up and down along the gas flow line so that the fl ascent and descent that hit the top lid plate 142 is evenly mixed by the turbulent flow, So that the flue gas can be distributed at an even density over the entire lateral cross section of the upper inflow pipe 140.

In addition, at least one baffle plate may protrude from the inner wall surface of the upper inflow pipe 140 toward the gas inflow duct 130 in a direction opposite to the gas inflow duct 130, The flow of exhaust gas flowing downward through the inflow pipe 140 can be struck once more, and in particular, the flow of the exhaust gas, which can flow in a direction opposite to the gas inflow duct 130 in the upper inflow pipe 140, And the flue gas was further mixed by mixing to obtain a uniform density distribution. That is, for example, when comparing the density of the exhaust gas at the X ₃ point and the X ₄ point of the upper inflow pipe 140 in FIG. 5, the inert gas entering the gas inlet duct 130, The exhaust gas density at the X ₃ point located in the opposite direction to the exhaust gas flow at the X ₄ point may be higher than the exhaust gas density at the X ₄ point. In this flue gas flow, the flow of the gas-dense portion is blocked by the baffle plate 141, The gas flow after passing through the baffle plate 141 is uniformly distributed over the entire cross section of the reaction tower (see FIG. 8).

In the lower portion of the upper inflow pipe 140, there is an expanding pipe portion 150 whose diameter gradually increases as it goes down. The expanding pipe portion 150 is divided into a plurality of stages along the height direction A plurality of slurry supply means 300 are provided. The slurry supply means 300 is connected to the slurry supply pipe and the slurry supply pipe to supply the absorbent slurry to the injection nozzles 310, 311, 312, and 313 which are capable of spraying the absorbent slurry in the form of fine droplets such as fog Unlike the injection nozzles used in the conventional semitransparent reaction column 10 (see FIGS. 2 and 4), the injection nozzles applied to the present invention are shaped such that the shape of the nozzle holes themselves is long in the horizontal direction, Flattened so that the absorbent slurry droplets are sprayed in a horizontally wide fan shape at an angle of 70 to 80 degrees and sprayed in a narrow angular distribution of 10 to 20 degrees in the vertical direction.

The injection nozzles 310, 311, 312, and 313 applied to the present invention may be installed through the cylinder of the expansion tube portion 150 or may protrude only to a length of about several centimeters on the inner wall surface of the expansion tube portion 150 (NaOH or Ca (OH) ₂ ) contained in the slurry sprayed from the spray nozzles located above the spray nozzles located below the spray nozzles. At this time, the length of the injection nozzles 310, 311, 312, and 313 protruding from the inner wall surface of the expansion tube portion 150 is preferably set to 3 to 10 cm. Therefore, the spray nozzles 310, 311, 312, and 313 of the present invention can be installed in a multistage structure along the height direction with no fear of contamination and failure by the slurry, and as an example of such a design structure , And FIG. 5 shows that the injection nozzles 310, 311, 312, and 313 are provided in three stages along the height direction of the expansion tube portion 150.

The worktable 40 is installed in the extension pipe 150 of the reaction tower 100 so that workers can access the slurry supply pipe and the injection nozzles 310, 311, 312 and 313. The worktable 40 is reinforced by the support structure 42 with respect to the tube of the extension tube portion 150 and the safety fence 41 is installed on the worktable 40 to prevent the risk of falling.

The configurations of the inlet support fixing means 50 and the support 20, the reinforcing plate 112, and the horizontal support beam 21, which are the gases shown in Fig. 5, are the same as those of the conventional semi- (10), detailed description thereof will be omitted.

Meanwhile, the main reaction tower 110 of the semi-automatic reaction tower 100 has a plurality of reinforcing binding parts 111 along the height direction. The reinforcing binding parts 111 are arranged in a transverse direction along the circumference of the main reaction tower 110 to reinforce the rigidity of the reaction tower installed at a height of several tens of meters, So as to form a corrugated shape.

5, L ₁ denotes the total height of the semi-dry type reactor 100, L ₂ denotes the distance from the ground G to the lower end of the lower hopper 170, L ₃ denotes the length of the lower hopper 170 L ₄ is the length of the main reaction tower 110, L ₅ is the length of the expansion tube 150 and L ₆ is the length of the upper inflow tube 140. And W ₁ is the center of the distance (H), L ₈ is the gas exhaust duct 160 to the center of the gas outlet duct 160 from the mean width of the reaction container (100) and, L ₇ is ground (G) L ₉ denotes a distance between the upper lid plate 142 and the center of the pipe connecting portion 131.

According to the experiment conducted by the present inventors, in the actual design of the semi-dry reaction tower 100, L ₁ is 32 to 39 m, L ₂ is 2 to 3 m, L ₃ is 4 to 4.5 m, L ₄ is 15 to 17 m, L ₅ is 4.5 to 5.5 m, L ₆ is 7.1 to 8.5 m, L ₇ is 4.5 to 5.5 m, L ₈ is 26 to 31 m, L ₉ is 2.2 to 3.2 m, and W ₁ is set to 5 to 6 m . And further More particularly the above design dimensions, L ₁ is 35.899m, L ₂ is 2.356m, L ₃ is 4.244m, L ₄ is 16.433m, L ₅ is 5.127m, 7.739m is L _6, L ₇ is 5.1m, L ₈ is 28.099m, L ₉ is a 2.696m and, W ₁ has been confirmed that it is best to design a 5.55m.

FIG. 6 also shows the structure of the absorbent slurry pretreatment apparatus 180 for feeding the absorbent slurry 183c to the absorbent slurry feeding means 300 of the semi-dry type reaction column 100 shown in FIG.

In the present invention, the absorber slurry sprayed into the reaction tower by the absorber slurry supply means 300 is prepared by adding sodium hydroxide (NaOH) or calcium hydroxide (Ca (OH) ₂ ), which has a property of neutralizing and oxidizing sulfur oxides, It is preferable that the absorbent slurry is prepared and supplied by an absorbent slurry pretreatment apparatus 180 provided separately from the semi-dry type reaction tower 100 itself.

6, the absorbent slurry pretreatment facility 180 includes an absorbent storage hopper 181 for storing and storing an alkaline absorbent 181a such as sodium hydroxide or slaked lime, an absorbent storage hopper 181 connected to the absorbent storage hopper 181, A fixed amount feeder 182 which draws a predetermined amount of the absorbent 181a by a predetermined amount and feeds the absorbent 181a by a predetermined amount, in particular, the amount of absorbent 181a transferred from the fixed amount feeder 182, and mixes the absorbent 181a with water to mix the slurry 183c A stirrer 186 installed in the slurry tank 183 for continuously mixing the slurry 183c in the slurry tank 183 by rotation by a motor 186a, And a transfer pipe 185 extending from the slurry supply unit 183 to the slurry supply unit and a transfer pipe 185 disposed between the discharge pipe 183d of the slurry tank 183 and the transfer pipe 185, Down forcibly by a pump 184 to send to the slide.

The alkaline slurry used as the absorbent may be a suspension of sodium hydroxide (NaOH) in water at a concentration of 0.1 to 10 wt%, or a slurry of lime (calcium hydroxide) or lime (lime) at a concentration of 5 to 20 wt% A suspension in water may also be used. Further, it is more preferable that the concentration of the absorbent slurry using sodium hydroxide is set to 0.1 to 5 wt%, and the concentration of the absorbent slurry using lime is set to 13 to 17 wt%, particularly, to the Ca (OH) ₂ concentration of 15 wt% desirable.

Here, the term lime generally refers to an inorganic substance containing calcium, and strictly speaking refers to calcium oxide (CaO) or calcium hydroxide (Ca (OH) ₂ ).

On the other hand, the slurry in the slurry tank 183 is mixed with solid particles in the water, so that the slurry falls down when sedimented, so the slurry must be continuously mixed with the agitator 186.

In FIG. 6, reference numeral a indicates that the transfer pipe 185 in the absorbent slurry pretreatment facility 180 extends to the slurry supply pipe of the slurry supply means provided in the extension pipe portion 150 of the semi-

7 is a schematic view illustrating an exhaust gas flow and the injection nozzles 310, 311, and 311 in the expansion tube 150, the upper inlet pipe 140, and the gas inlet duct 130, which are located on the upper part of the semi- 312 and 313, respectively, of the absorbent slurry.

5, the connection angle between the gas inlet duct 130 and the upper inflow pipe 140 is intentionally changed to a sharp angle of 20 to 60 degrees, and the upper inflow pipe 140 A baffle plate 141 protrudes from one side of the inner wall surface of the gas inlet duct 130 opposite to the gas inlet duct 130 so that the exhaust gas flowing into the upper inlet pipe 140 hits the upper lid plate 142 to cause turbulent flow The baffle plate 141 is subjected to the phenomenon of being rectified and mixed so that the density distribution of the exhaust gas becomes uniform throughout when the exhaust gas enters the expansion pipe portion 150. [

The baffle plate 141 provided on the inner wall surface of the upper inflow pipe 140 protrudes in the horizontal direction from the inner wall surface of the upper inflow pipe 140 and may be installed in one or more . The baffle plate 141 is installed at a position opposite to the direction in which the gas inlet duct 130 is installed and the baffle plate 141 is located at a maximum distance from the inner wall surface of the upper inflow pipe 140 toward the center The length of the protruded portion occupies 10 to 30% of the diameter of the upper inflow pipe 140 and the length of the baffle plate 141 in the circumferential direction of the maximum extending portion along the circumference of the inner wall surface of the upper inflow pipe 140 It is preferable that the length occupies 5 to 30% of the circumferential length of the inner wall surface of the upper inflow pipe 140.

The exhaust gas that has entered the upper inflow pipe 140 through the gas inflow duct 130 strikes the baffle plate 141 to generate a turbulent flow so that when the horizontal cross section of the upper inflow pipe 140 is taken as a reference, The exhaust gas is evenly distributed.

That is, in FIG. 7, the gas flow lines 500 indicated by thick lines with respect to the extension tube portion 150 can be seen that the exhaust gas flows with a uniform density distribution over the entire cross-sectional area of the extension tube portion 150, At this time, absorbent slurries are injected in the form of mist through the injection nozzles 310, 311, 312, and 313 installed in the extension pipe portion 150, so that absorption, drying, neutralization, and oxidation reactions between the sulfur oxide and the absorbent in the exhaust gas actively occur.

The reaction with sulfur oxides in the case of using sodium hydroxide as the absorbent in the semi-dry type reaction column 100 of the present invention

SO ₂ + ₂ NaOH ---> Na ₂ SO ₃ + H ₂ O

SO ₃ + ₂ NaOH ---> Na ₂ SO ₄ + H ₂ O

_{Na 2 SO 3 + SO 3 +} H 2 O ---> 2NaHSO 3

NaHSO ₃ + NaOH ---> Na ₂ SO ₃ + H ₂ O

And can be represented by the chemical reaction formula of

At this time,

Na ₂ SO ₃ +1/2 O ₂ ---> Na ₂ SO ₄

Lt; / RTI &gt;

In case of using lime as an absorber,

SO ₂ + Ca (OH) 2 ---> CaSO ₃ + H ₂ O

SO ₃ + Ca (OH) 2 ---> CaSO ₄ + H ₂ O

Respectively,

At this time,

Ca ₂ SO ₃ +1 / ₂ O ₂ ---> CaSO ₄

Lt; / RTI &gt;

In FIG. 7, reference numeral 340a denotes an injection area of slurry injected from the injection nozzles 310, 311, 312, and 313. Since Figure 7 itself is in the form of a mouth section, the slurry dispensing region 340a schematically represents the area of the sorbent spray in the vertical direction.

8 is a simulation showing the density distribution of the flue gas in the cross sectional area when the extension pipe portion 150 of the semi-dry type reaction column 100 is cut along the BB line of FIG. 5, wherein FIG. 5 shows a state in which the baffle plate 141 is not installed in the inflow pipe 140 and the baffle plate 141 is installed in the upper inflow pipe 140 as shown in FIG.

8, when the baffle plate 141 is not installed in the upper inflow pipe 140 (see FIG. 8), the flue gas is biased toward one wall portion of the upper inflow pipe 140 So that the flue gas can not be evenly distributed over the entire horizontal cross section of the expansion pipe portion 150. [ 8, the density distribution of the exhaust gas flowing through the cross-sectional area of the expansion tube portion 150 is largely divided into three regions, and the gas density of the first gas density region 151 located at the right side is the highest, The intermediate second gas density region 152 has a lower gas density than the first gas density region 151 and the gas density of the leftmost third gas density region 153 is the lowest.

However, in the case where the baffle plate 141 is installed in the upper inflow pipe 140, simulation results show that the first gas density region 151 is all over the cross sectional area of the expansion pipe portion 150 as shown in FIG. Only a fraction of them have a slightly lean gas density as the second gas density region 152. That is, it was confirmed that the baffle plate 141 employed in the semitransparent reaction column 100 of the present invention has a great effect for improving the flow distribution pattern of the exhaust gas.

9 is a cross-sectional view of the enlarged tube portion 150 of the semi-dry type reaction vessel 100 taken along the CC line of FIG. 5 in the transverse direction. The spray nozzles 312 and 310 are overlapped with the sprayed sprayed regions 340. The sprayed nozzles 312 and the sprayed nozzles 312 shown in FIG. Fig. <B> illustrates a state where 30 injection nozzles 310 are installed.

9, the injection nozzles 310, 311, 312, and 313 employed in the semi-dry type reaction column 100 of the present invention may be installed so as to be plugged into the tube body of the extension tube portion 150, Since the length of the protrusion from the inner wall surface is extremely small as about several centimeters, even if the injection nozzles are installed in several stages in the height direction, the spray nozzles are contaminated by the sprayed slurry from above, There is little work. In this case, the length of the injection nozzles 310, 311, 312, and 313 protruding from the inner wall surface of the expansion tube portion 150 is preferably set to 3 to 10 cm.

As described above, according to the present invention, the injection nozzles can be installed in several stages in the semi-dry type reaction column 100 by the feature of the installation structure of the injection nozzle itself, and since the injection nozzles are installed around the outer periphery of the reaction tower, Jet nozzles can be installed. When a large number of spray nozzles are dispersed and installed in the reaction tower, the entire area of the reaction tower can be uniformly sprayed with the absorbent slurry. As a result, the contact area and space with the exhaust gas can be maximized It is possible to maximize the absorption reaction between the absorbent and the sulfur oxide.

In FIG. 9, reference numeral 340 denotes a spray area of the absorbent slurry sprayed from one spray nozzle 310, 312, and reference numeral 345 denotes a spray area of the absorbent slurry sprayed from two or more spray nozzles 310, Quot; overlapping &quot; regions.

FIG. 10 shows the structure of the semi-automatic reaction tower 100 according to the first embodiment of the present invention and the horizontal wet electrostatic precipitator 600 provided at the rear end thereof.

Referring to FIG. 10, the flue gas discharged through the gas discharge duct 160 provided at the lower end of the semi-dry type reactor 100 according to the first embodiment of the present invention is discharged through the first connection duct 630a, A high voltage is applied between the dust collecting plate 602 and the discharge rod 604 in the dust collecting chamber 601 provided in the inner space of the horizontal wet type electrostatic precipitator 600 Dust and solids adhere to the dust collecting plate 602 due to the corona discharge phenomenon that occurs.

That is, when the dust collecting plate 602 is charged to the (+) pole by the high voltage unit 620 installed on the upper part of the horizontal wet electrostatic precipitator 600 and the discharge rod 604 is charged to the (- The dust and solids contained in the exhaust gas in the exhaust gas 601 are charged to the negative pole and the dust and the solids charged to the negative pole are adhered to the dust collecting plates 602 having the positive polarity. Dust and solids attached to the dust collecting plates 602 are washed by the washing water supplied by the washing water supplying means (not shown) in the dust collecting chamber 601 and collected in the waste water collecting tanks 610 at the lower end of the electrostatic precipitator 600, These wastewaters are purified through separate purification facilities and then discharged. Through this process, the exhaust gas from which dust and solids are removed passes through the outlet 631 provided at the other side of the horizontal wet type electrostatic precipitator 600 to the second connection duct 631a, and then the third connection duct 631b And then discharged to the chimney.

10, reference numeral 602a denotes a 'dust collecting plate upper connecting portion' which is connected to the upper end of the dust collecting plate 602 to catch the dust collecting plate 602 from above, and reference numeral 621 denotes a clean air supplying unit to the high voltage unit 620, Reference numeral 622 denotes an upper fixing part which is installed in the insulator box and is fixedly connected to the dust collecting plate upper connection part 602a and reference numeral 640 denotes a wet type electrostatic precipitator 600, G and a work platform 641 is installed inside the electrostatic precipitator 600 so that an operator can access and repair and repair equipment such as the dust collecting plate 602 and the discharge rod 604 . Reference numeral 605 denotes a step provided outside the horizontal wet type electrostatic precipitator 600 to allow the operator to move in the height direction of the apparatus. Reference numeral 606 denotes a stepwise reaction type reaction tower 100 and a horizontal wet type electrostatic precipitator 600 And 606a is a support beam for supporting the connection overpass 606. [

11 shows the detailed construction of the slurry supplying means 300 used in the semitransparent reaction column 100 according to the first embodiment of the present invention. The slurry supplying means 300 is a state in which the spraying nozzle 311 is coupled to the slurry supplying pipe 330 / RTI &gt;

11, the slurry supply pipe 330 receives the alkaline absorbent slurry from the slurry tank 183 shown in FIG. 6 through the delivery pipe 185 and applies the slurry to the injection nozzle 311, The injection nozzle 311 is coupled to the slurry supply pipe 330 to spray the absorbent slurry in the form of mist through the nozzle hole 311f.

The injection nozzle used in the semi-dry type reaction column of the present invention is a so-called adiabatic nozzle, which mixes gas and liquid and blows the liquid by the force of compressed air.

11, the nozzle body 311a of the injection nozzle 311 is formed with a male screw portion 311a-3 at its base portion and a female screw portion 331a formed on the inner wall surface of the slurry supply pipe 330 A flange nut 311b is fastened to the nozzle body 311a and a compact spherical washer 311c is fastened to the coupling gap between the nozzle body 311a and the flange nut 311b. There is. A front plate 311e and a front cap 311d are coupled to a front surface of the compact spherical washer 311c and a nozzle hole formed in the front plate 311e in a horizontally long direction and formed in a narrow space in a vertical direction 311f are provided so that the slurry material such as liquid can be discharged to the nozzle holes 311f. A plurality of air discharge holes 311g are formed in the periphery of the nozzle hole 311f so that compressed air is discharged through the air discharge holes 311g so that liquid discharged through the nozzle hole 311f It can be disturbed into fine droplets and sprayed in the form of mist by the influence of compressed air.

11 shows that the fine droplets 341 of the slurry are sprayed from the nozzle hole 311f of the spray nozzle 311 by an angle of? In the horizontal direction. At this time, the spray angle in the horizontal direction? It is preferable that the droplets of the slurry are sprayed in the form of mist at an angle of 70 to 80 °, particularly preferably at an angle of 75 °. 11, reference numeral 340 denotes a 'spraying area of the slurry' sprayed from the spraying nozzle 311.

12 is a front view of the injection nozzle 311 of Fig. 11 viewed from the direction of d &amp; cir &amp;, and Fig. 13 is a sectional view of the injection nozzle 311 of Figs. 11 and 12 taken along the line EE of Fig. 12 .

13, the injection nozzle 311 is formed with a male screw portion on the outer surface 311a-2 of the front portion of the nozzle body 311a, and a flange nut 311b is coupled to the male screw portion The compact spherical washer 311c is fitted into the inner space of the flange nut 311b and the compact spherical washer 311c is positioned at the front portion of the nozzle body 311a. A front plate 311e and a front cap 311d are coupled to the front surface of the compact spherical washer 311c. A slurry passage 311a-4 is formed in the injection nozzle 311 along the longitudinal direction of the central axis. A nozzle hole 311f is formed in a front portion of the nozzle body 311a, (311f) is in communication with the slurry passing path (311a-4). The flange nut 311b has a female thread formed on the inner wall surface thereof and is coupled to the nozzle body 311a in such a manner as to surround the outer periphery of the front surface of the nozzle body 311a by being fastened to the male threaded portion of the nozzle body 311a.

The front cap 311d is coupled to the compact spherical washer 311c and has a through hole formed at the center thereof. The front cap 311d has a plurality of air vent holes 311g formed at an inclined area of the front surface thereof, 311g communicate with an air passage 311h formed at an oblique angle on the periphery of the slurry passage 311a-4 of the nozzle body 311a. It is preferable that the air passage 311h formed in the nozzle body 311a has an angle of 25 to 45 degrees with respect to the slurry passage 311a-4.

When the compressed air is supplied into the air passage 311h through the inlet of the air passage 311h of the nozzle body 311a, the compressed air flows through the air passage 311h to the air discharge hole 311g of the front cap 311d, At this time, the liquids discharged through the nozzle hole 311f are scattered by the force of the compressed air and sprayed in the form of fine liquid droplets.

In FIG. 13, reference numeral 311a-5 denotes a portion leading to the slurry passage 311a-4 as a 'first bore reduction slope' formed in the bottom portion of the injection nozzle 311, Quot; refers to a 'second aperture reduction slope' that serves to increase the pressure and jetting speed of the fluid by rapidly narrowing the width immediately before the nozzle hole 311f after passing the slurry passage 311a-4. Reference numeral 317 denotes a 'threaded portion' to which a threaded portion formed on the outer periphery of the front portion of the nozzle body 311a is coupled with a female threaded portion 311b of the flange nut 311b.

Referring to FIG. 12, there is shown a nozzle plate 311e having a nozzle hole 311f formed horizontally flat and having a long groove shape on the front plate 311e. A plurality of air exhaust holes 311g are formed on the front slope 311d-1 of the front cap 311d surrounding the front plate 311e. 12, the air discharge hole 311g may be formed by a plurality of three or more than two nozzle holes 311f on both sides of the nozzle hole 311f, One on each side of the nozzle hole 311f, and may be formed to have a shape that is long and torn like a nozzle hole 311f.

12, reference symbol D ₁ denotes the diameter of the thickest part of the injection nozzle 311, D ₃ denotes the outer diameter of the front cap 311d, D ₂ denotes the outer diameter of the front cap 311d and the flange nut 311b And D ₅ is the inner diameter of the front cap 311d. And S ₂₁ is the horizontal length of the nozzle holes (311f), t ₁ is the vertical thickness of the nozzle holes (311f), D ₆ is the diameter of the air discharge hole (311g).

13, reference symbol D ₄ denotes the thickness between the outer diameter and the inner diameter of the front cap 311d, S ₁ denotes the length of the nozzle body 311a, D ₇ denotes the slurry passage 311a in the nozzle body 311a -4), with a diameter of, D ₈ indicates the outer diameter of the male thread (311a-3) a nozzle body (311a) formed in part.

14 is a cross-sectional view of the injection nozzle 311 of FIG. 13 in a state where the slurry supply pipe 330 is coupled with the slurry passage 311a-4 provided at the center of the injection nozzle 311 and the nozzle hole 311f It shows a scene where the absorbent slurry is sprayed in the form of fine droplets.

14 shows the state of fluid flow during the operation of the injection nozzle 311. The slurry flow path 311a-4 provided at the center of the injection nozzle 311 through the slurry supply pipe 330 supplies the slurry fluid The slurry fluid suddenly passes through the second bore reduction inclined portion 311a-6, which becomes narrower in passage, so that the pressure and the velocity are increased, and the fluid is ejected at a very high speed through the nozzle hole 311f. At this time, compressed air ejected from the upper and lower sides of the nozzle hole 311f through the air exhaust holes 311g with a strong pressure acts on the slurry ejected from the nozzle hole 311f. By the force of the compressed air, Is disturbed by numerous droplets of fine particle size of tens to hundreds of microns and is sprayed like mist. 14, the jetting range 340a of the slurry droplets 341 sprayed from the nozzle hole 311f forms an angle? Of 10 to 20 占 with respect to the vertical direction thereof, As shown in FIG.

14, reference numeral 331 denotes the inside of the tube of the slurry supply pipe 330. Reference numeral 311a-1 denotes a portion of the nozzle body 311a which has the largest diameter from the outer surface 311a-2 of the nozzle body 311a As shown in FIG.

15 is a cross-sectional view of a semitransparent reaction column 200 having improved SOx removal efficiency through improvement of a gas flow pattern according to a second embodiment of the present invention. The second embodiment of the present invention shown in FIG. 15 differs from the first embodiment (FIGS. 5 to 14) in that it is a bottom inflow type semi-annular reaction tower.

That is, the semitransparent reaction column 200 includes a hollow cylindrical main reaction column 210 vertically installed, a dual pipe structure 220 installed at a lower portion of the main reaction column 210, A lower support 230 supporting the entire reaction tower below the dual pipe structure 220 and a horizontal discharge guide duct 250 connected to the upper side of the main reaction tower 210. The gas inlet duct 240, And a gas discharge duct 260 bent downward from the horizontal discharge guide duct 250.

The double pipe structure 220 has two hollow cylinders, that is, an outer cylinder 221 and an inner cylinder 223, which are concentric with each other. The upper end edge of the inner tube 223 and the upper end edge of the outer tube 221 are connected to each other by the intermediate extension tube portion 222. [

It can be said that the outer tube 221 of the double tube structure part 220 is the tube body of the main reaction tube part 210 on the upper part of the outer tube 221 of the double tube structure part 220. The lower part of the main reaction tube part 210 can be regarded as the outer tube 221 It is acceptable. The inner tube 223 is a separate hollow cylindrical member disposed concentrically inside the outer tube 221. An intermediate expanding tube portion 222 having a larger diameter in the form of a hopper is integrally coupled to the upper end of the inner tube 223, And a rim enlarged portion 224 is formed at the lower end of the inner tube 223 so as to extend toward the lower end of the inner tube 223. The gap between the bottom surface 221a of the outer cylinder and the rim enlarged portion 224 of the inner tube 223 is spaced from each other and a gas cylinder and a gap 227 exist.

As a result, the upper end portions of the inner tube 223 and the outer tube 221 are sealed by welding or the like so that gas can not escape and a 'turbulent swinging space 225' between the inner tube 223 and the outer tube 221 Can be connected to the space 226 inside the inner cylinder 223 only by the 'gas cylinder and gap' 227 between the lower end of the inner cylinder 223 and the bottom surface 221a of the outer cylinder 221.

In FIG. 15, the flue gas flow in the semi-automatic reactor 200 is indicated by arrows. 15, when the flue gas flows into the gas inlet duct 240 connected to the side portion of the dual pipe structure 220, the flue gas flows in the 'turbulent swing space' between the outer cylinder 221 and the inner cylinder 223 The inner space 223 of the inner tube 223 is gradually moved through the gas passage gap 227 under the rim enlarged portion 224 at the lower end of the inner tube 223, 226). The flue gas then rises up through the inner space 226 of the inner tube and the middle expansion tube portion 222 and rises up to the position of the upper lid plate 252 along the main reaction tower portion 210 and then horizontally bent And then discharged to a rear stage dust collecting facility such as an electrostatic precipitator through the discharge guide pipe 250 and the gas discharge duct 260 bent downward.

Meanwhile, the semi-dry type reaction vessel 200 according to the second embodiment of the present invention is arranged at an angle or at a position spaced apart from the upper side of the double tube structure part 220 by a predetermined interval in the circumferential direction on the tube body of the main reaction tower part 210 A plurality of spray nozzles 310 serving as a slurry supply means are installed in the spray nozzles 310. The slurry of the adsorbent in the form of fine droplets in the form of mist sprayed from the spray nozzles 310 is sprayed in the flue gas rising along the main reaction tower 210 Thus, the neutralization reaction and the oxidation reaction between the flue gas and the slurry droplets of the absorbent occur, so that the sulfuric acid in the flue gas is absorbed and dried by the absorbent, and when sodium sulfate (when sodium hydroxide is used as the absorbent) or gypsum Lt; / RTI &gt; solid form.

On the other hand, the injection nozzles 310 provided in the main reaction tower 210 directly use the atomizing nozzles (see FIGS. 11 to 14) of the airflow system as described in the first embodiment of the present invention. Accordingly, in the second embodiment of the present invention, the injection nozzles can be divided into a plurality of stages along the height direction of the main reaction tower 210, and as a result, the contact reaction time and opportunity between the exhaust gas and the absorbent slurry The removal effect of sulfur oxides can be enhanced. Particularly, by the special fluid flow induction method of the dual pipe structure part 220, the exhaust gas is sufficiently mixed in the 'turbulent swing space' 225, and the density distribution of the exhaust gas is made uniform in the space. The slurry is absorbed by the slurry of the absorbent slurry in the form of droplets in the process of ascending through the inner space 226 of the inner tube 223 and the middle expansion tube 222, The absorption reaction between the adsorbent slurry and the absorbent slurry takes place almost uniformly, and the removal efficiency of sulfur oxides can be greatly increased.

In addition, in the semi-automatic reaction tower 200 according to the second embodiment of the present invention, the injection nozzles 310 are pierced through the tubular body of the main reaction tower 210, So that even if the injection nozzles are arranged at several stages in the height direction, the absorbent slurry sprayed from the above spray nozzles can be sprayed to the inner side of the spray nozzle There is no pollution.

Like the spray nozzle described in the first embodiment, the spray nozzle 310 of the second embodiment also spreads at an angle of 70 to 80 degrees in the horizontal direction and spreads only at a narrow angle of 10 to 20 degrees in the vertical direction Thus, even if the injection nozzles 310 are divided into several stages along the height direction of the main reaction tower 210, the injection nozzles of each stage sufficiently perform the function of removing sulfur oxides, Or waste of the absorbent slurry.

Here, it is preferable that the injection nozzle 310 is designed to inject liquid at a pressure of 3 to 5 kg / cm 2, and it is preferable that the liquid sprayed from the injection nozzle 310 travels at a distance of about 1.5 to 2.5 m . Accordingly, for example, in the case of the semitransparent reaction column 200 of the second embodiment shown in Figs. 15 and 16, the diameter of the slurry is distributed in a range of 4 to 5 m, and the distribution of the slurry sprayed from one injection nozzle 310 Range is about 20% to 63% of the diameter of the semitransparent reaction column 200.

Since the internal temperature of the semi-dry type reactor 200 is maintained at a high temperature of 200 to 300 ° C, the slurry sprayed from the spray nozzles 310 evaporates immediately after spraying. Since the slurry itself sprayed by the spray nozzles 310 is sprayed in a mist form including fine droplets (for example, 20 to 100 mu m in size), the high temperature The evaporation due to the atmosphere proceeds very quickly. As a result, the slurry evaporates in a short time from 0.5 second to 1 second from the moment of spraying from the spray nozzles 310, There is absolutely no liquid floating off the floor.

Meanwhile, it is preferable that the amount of the slurry liquid supplied by the total injection nozzles 310 in the semi-dry type reaction chamber 200 is set to about 5 to 10 tons per hour.

15, the semi-automatic reaction tower 200 according to the second embodiment of the present invention includes a work table 40 to allow workers to access the slurry supply means or the spray nozzle of the main reaction tower 210, In the case of the semi-automatic reaction tower 200 according to the second embodiment, since the injection nozzles 310 are installed at a height of about 4 to 7 m, the conventional semi-automatic reaction tower 10 (see FIG. 2) The injection nozzles 310 are provided at a much lower position than the semi-dry type reaction tower 100 (see FIG. 5) of the embodiment, so that the operator is easy to approach, the risk of the work is much lowered and the safety accident can be prevented. Can be greatly reduced.

15, reference numeral 261 denotes a portion where the upper end of the main reaction tower 210 is connected to the horizontal discharge guide pipe 250, 262 denotes a connection between the horizontal discharge guide pipe 250 and the gas discharge duct 260, Point. Reference numeral 215 designates a "tube joint portion" where the outer tube 221 of the dual tube structure portion 220 and the upper end of the intermediate extension tube portion 222 inside thereof are connected and sealed by welding or the like, And indicates a horizontal pipe portion extending in a certain diameter from the inlet duct 240.

In Figure 15, the reference numeral L ₁₁ denotes the entire height of the semi-dry reaction tower (200), L ₁₂ is the height, L ₁₃ is the distance (length), L ₁₄ of the gas passage and the aperture 227 of the lower support portion 230 includes a rim the length of the enlarged portion (224), L ₁₅ is the length, L ₁₆ is the length, L ₁₇ is the length, L ₁₈ of the primary reaction tapbu 210 of the middle extension tube 222 of the inner tube 223 is a lower support portion 230 And the total height of the semi-cylindrical reaction tower 200 except for the above. W ₂ denotes the diameter of the main reaction tower 210 of the semi-automatic reaction tower 230; D ₁₁ denotes the radius of the main reaction tower 210; W ₃ denotes the radius of the main reaction tower 210; And D ₁₂ represents the radius of the gas discharge duct 260. The distance D is the distance from the central axis of the discharge duct 260 to the center axis of the discharge duct 260,

According to the experimental results of the present inventor, in the actual design of the semi-dry reaction tower 200, L ₁₁ is 19 to 25 m, W ₂ is 4 to 5 m, L ₁₈ is 18 to 22 m, L ₁₉ is 2.2 to 3.1 m, D ₁₁ to 1.8 to 2.5 m, W ₃ to 4.5 to 5.2 m, and D ₁₂ to 0.7 to 1.3 m. More specifically, L ₁₁ is 22.43 m, W ₂ is 4.5 m, L ₁₈ is 19.63 m, L ₁₉ is 2.6 m, D ₁₁ is 2.25 m, W ₃ is 4.75 m, D ₁₂ It is confirmed that the semi-dry type reaction tower can exert the optimum effect by designing it at 1 m.

FIG. 16 is a schematic perspective view of the semi-dry type reaction vessel 200 shown in FIG. 15, and explains a gas flow system inside the semi-dry type reaction bed 200. FIG.

FIG. 16 is a schematic perspective view of the semi-dry type reaction vessel 200 shown in FIG. 15, and explains a gas flow system inside the semi-dry type reaction bed 200. FIG. 16, the gas inlet duct 240 includes a horizontal tube portion 241 having the same diameter and extending horizontally, and a plurality of gas inlet ducts 241 extending in the left-right direction from the horizontal tube portion 241, The extended connection portion 242 has a horizontally extended space along the outer circumferential surface of the outer tube 221 so that the outer tube 221 is connected to the outer tube 221 through the gas inlet duct 240, The exhaust gas flowing into the inner tube 223 spreads in the horizontal direction to guide the outer tube 223 around the inner tube 223 easily. Due to the design structure of the gas inlet duct 240 and the dual pipe structure 220, the flue gas introduced into the outer cylinder 221 flows through the peripheral portion of the inner cylinder 223 while firstly colliding with the inner cylinder 223, 225), and experience a considerable mixing effect, so that the flow rate is considerably slowed down.

When the flow rate of the flue gas in the gas inlet duct 240 is set to 18 to 20 m / sec, the turbulence in the outer cylinder 221 is reduced, The flow rate of the flue gas in the swinging space 225 is drastically reduced to 12 to 14 m / sec and is 14 to 16 m / sec at the gas cylinder and the gap 227 below the inner cylinder 223, Sec in the middle expanding tube portion 222 and the main reaction tower 220 in the upper part thereof, and 4 to 6 m / sec.

If the flue gas velocity inside the semi-dry type reactor 200 is too high, there is a problem that the exhaust gas is discharged to the outside even before the reaction between the absorbent and the sulfur oxide occurs even when the absorbent slurry is injected. Therefore, So that the reaction time with the absorbent slurry is sufficiently secured. The semi-dry type reactor 200 according to the present invention can sufficiently lower the gas flow rate to about 3 to 4 m / sec according to the configuration of the extended connection portion 242 of the gas inlet duct 240 and the structural characteristic of the dual pipe structure portion 220, The reaction time between the absorbent and the sulfur oxide can be sufficiently secured, and the SOx removal efficiency can be maximized. Also, the semi-dry type reaction bed 200 of the present invention has a problem that the conventional semi-dry type reaction bed apparatuses have to be made extremely long and as high as several tens of meters in height for the purpose of securing the reaction time of the absorbent, The height of the semi-dry type reaction tower can be lowered compared with the conventional one. The ability to lower the height of the semi-automatic reaction tower not only lowers initial production costs, but also significantly reduces maintenance costs during operation.

FIG. 17 shows a state in which the semi-dry type reaction column 200 shown in FIG. 15 is cut along the line F-F, and the gas flow inside the semi-dry type reaction column 200 will be described. As described above, the expansion connecting portion 242 provided at the end of the gas inlet duct 240 is widened in the horizontal direction and is formed into a curved surface or a round shape, so that the gas is gently guided into the inner space of the outer casing 221 As a result, the exhaust gas flows along the outer circumferential surface of the inner tube 223, and flows on the opposite side of the side where the gas inlet duct 240 is positioned with respect to the inner tube 223, Causing a considerable mixing phenomenon.

The arrows indicated by arrows flowing from the turbulent swinging space 225 inside the outer cylinder 221 toward the inner cylinder 223 indicate that the exhaust gas in the turbulent swinging space 225 is discharged from the gas cylinder 223 provided below the lower end of the inner cylinder 223, And enters the inner space of the inner cylinder 223 through the gap 227.

FIGS. 18 and 19 show a modification of the second embodiment of the present invention, in which a lime powder feed pipe 245 is installed in the gas inlet duct 240. The lime powder refers to calcium hydroxide (Ca (OH) ₂ ) or calcium oxide (CaO). In the present invention, lime powder is sprayed into the exhaust gas in the gas inlet duct 240 through the lime powder feed pipe 245 .

The installation position of the lime powder inlet pipe 245 and the installation position of the gas inlet duct 240 are different from each other because the slaked lime powder is not easily mixed with the flue gas even if the lime lime powder is sprayed in the flue gas in the gas inlet duct 240. [ A gas mixer 243 is provided between ends of the gas mixer 243 so that the slaked powder is spread and mixed evenly in the exhaust gas.

When spraying the slaked lime powder from the gas inlet duct 240, the spray nozzles 311 and 312 of the slurry supply unit 300 installed in the main reaction tower unit 210 are filled with sodium hydroxide solution with a concentration of 0.1 to 5 wt% It is also possible to operate the semi-dry type reaction column 200 in such a manner that the slaked lime and the sodium hydroxide are simultaneously used as the absorbents of the sulfur oxides, or alternatively, in the injection nozzles 311 and 312, It is also possible to operate the semi-dry type reactor 200 in such a manner that only the slaked liquor to be introduced into the lime powder feed pipe 245 is used as an absorbent.

At this time, when calcium hydroxide and sodium hydroxide are simultaneously used as an absorbent, sodium sulfate and gypsum are formed into a solid form by the reaction with sulfur oxides, and these solids are collected and removed by the dust collecting device at the rear end of the semi- When only the slaked lime is used as the absorbent, the gypsum is produced in the form of solid by the reaction with the sulfur oxides. The generated gypsum is removed by being collected by the bag filter connected to the rear end of the semi-dry type reaction tower.

19, water is sprayed by the two-stage spray nozzles 311 and 312 provided in the main reaction tower 210, or a slurry of sodium hydroxide (NaOH) of 0.1 to 5% is sprayed. Therefore, The sulfur oxides in the flue gas actively react with sodium hydroxide or slaked lime to produce gypsum and / or sodium sulfate solids.

In Figure 19 the reference numeral 340a is pointing to the slurry or the water injection area, Y ₁ and Y ₂ indicates a point and the point of contact before the flue-gas after the contact with the absorbent slurry, respectively.

Although FIGS. 18 and 19 illustrate that the injection nozzles 311 and 312 are provided in two stages, it is also possible to provide injection nozzles in three or more stages.

20 and 21 show a state in which the semitransparent reaction column 200 shown in FIG. 15 is cut along the GG line. FIG. 20 shows a state in which a plurality of FIG. 21 shows a slurry spraying state when all of the plurality of spraying nozzles 311 spray the slurry by simulating the spraying area 340 of any one of the spraying nozzles 311.

As already described in the first embodiment, the injection nozzle 311 used in the present invention is an air-flow nozzle having an injection angle of 70 to 80 degrees in the horizontal direction and an injection angle of 10 to 15 degrees in the vertical direction When the injection nozzles are arranged at various stages along the height of the main reaction tower 210, the absorbent slurry and the flue gas are contacted with each other several times to obtain more reaction opportunity and reaction time .

In FIG. 21, reference numeral 340 denotes a horizontal direction distribution region of the slurry sprayed from the injection nozzle 311, and 345 denotes a portion where the sprayed slurry regions 340 are overlapped from the plurality of injection nozzles 311.

FIG. 22 shows an example in which the second embodiment of the present invention is further modified. A slope discharge guide pipe 255 is provided at the upper end of the semi-dry reaction tower 200 to prevent dust from accumulating on the gas discharge pipe line. do.

In the case of Figs. 15 and 18 as the second embodiment described above, the horizontal discharge guide pipe 250 in which the gas is discharged extends in the horizontal direction, and dust, sodium sulfate, gypsum, etc. In order to solve this drawback, in the semitransparent reaction column 200a of FIG. 22, the discharge guide pipe 255 is inclined at an angle of 20 to 70 ° with respect to the vertical direction Respectively. In this case, dust and solids are not deposited on the inner wall surface of the inclined discharge guide pipe 255, which can greatly help maintenance and maintenance of the inside of the pipe, and can reduce the burden of work due to internal cleaning.

23 is a whole mouth cross-sectional view showing the structure of a semitransparent reaction bed 200b having improved SOx removal efficiency through improvement of a gas flow pattern according to the third embodiment of the present invention.

The third embodiment shown in FIG. 23 is similar to that of the semi-automatic reaction tower 100 described above with reference to the first embodiment (see FIG. 5) in the form of the entire reaction tower. In the inlet and outlet directions of the exhaust gas, As in the case of the semitone-type reaction column 200 described above in the second embodiment.

23, the semi-automatic reaction tower 200b according to the third embodiment includes a main reaction tower 210 erected in a vertical direction and having a cylindrical hollow space through which gas can flow, A gas inlet duct 240 communicating with the main reaction tower 210 at a position higher than a position of the lower hopper 270 and a gas inlet duct 240 connected to the main reaction tower 210, Slurry supply means and injection nozzles 311 and 312 provided on the outer circumferential surface of the main reaction tower 210 and a gas exhaust duct 260 extending outward in the lateral direction from the upper end side of the main reaction tower 210.

The support table 20 is installed at the lower end of the semi-dry reaction tower 200b to support the reaction tower with respect to the paper surface G. The work table 40 is provided at a position adjacent to the slurry supply means and the injection nozzles 311, It is possible for the workers to go up and perform activities such as maintenance. The slurry supply means and the spray nozzles 311 and 312 are installed at a low position so that the operator can easily access the slurry supply means and the spray nozzles 311 and 312. As a result, There is an advantage to be saved.

Since the injection nozzles 311 and 312 provided around the body of the main reaction tower 210 have the same configuration as the injection nozzles employed in the first and second embodiments, description thereof will be omitted.

The semitransparent reaction column 200b according to the third embodiment diffuses the exhaust gas entering the main reaction column 210 through the injection nozzles 311 and 312 through the gas inlet duct 240 under the main reaction column 210 By spraying the alkaline absorbent slurry, the sulfur oxides in the exhaust gas are converted into solid matters of sodium sulfate, and the exhaust gas containing the solids is discharged to a dust collecting facility such as an electrostatic precipitator through the gas discharge duct 260 above the main reaction tower 210 .

In Figure 23, the reference numeral L ₂₁ is pointing to the total height of the semi-dry reaction column (200b), L ₂₂ refers to a distance (height) of the center of the gas inlet duct (240) from the ground (G), L ₂₃ is the upper lid And L ₂₄ denotes the diameter of the gas discharge duct 260. The gas discharge duct 260 has a diameter of about 25 mm.

According to the experiment conducted by the present inventors, in the actual design of the semi-dry type reaction column 200b, L ₂₁ is 27 to 32 m, L ₂₂ is 9 to 10.5 m, L ₂₃ is 0.3 to 0.9 m, And L ₂₄ is preferably set to 1.5 to 2.5 m. More specifically, if the design values are more specifically specified, setting L ₂₁ to 29.55 m, L ₂₂ to 9.7 m, L ₂₃ to 0.502 m, and L ₂₄ to 2 m is more preferable than the above- It is possible to maximize the efficiency of the light emitting device 200b.

Fig. 24 shows a gas flow line 501 in the semi-automatic reaction column 200b of Fig. 24, a part of the flue gas introduced from the gas inlet duct 240 connected to the lower end of the semi-dry reactor 200b is mixed in the lower hopper 270 and mixed with each other, And the remaining part of the mixture is mixed and rises as it is collided with the inner wall surface of the opposite side of the main reaction tower part 200b.

The present invention applies a number of new and varied design elements that can affect the gas flow path inside the semi-dry reaction tower, so that the gas flow is distributed at a uniform density based on the cross section of the semi-dry reaction tower, The flow rate was delayed as much as possible to maximize the contact time with the absorbent slurry and the chance of contact. By using the injection nozzles having the characteristics not to be contaminated by the slurry, the injection nozzles can be arranged as a plurality of stages in two or more stages so that the exhaust gas flows through the aberration So that the contact time, contact frequency and mixing effect between the absorbent and the sulfur oxide gas can be maximized, and the sulfur oxide removal efficiency through the absorption, drying and neutralization of sulfur oxides in the exhaust gas can be remarkably improved There are advantages.

1: Glass melting furnace 2: Glass product manufacturing process
3: Finished products of glass products 4, 4 ': Desulfurization equipment
4a, 4a ': Semi-closed type reaction tower 4b: Electrostatic precipitator
4c: bag filter 5: chimney
10: Semi-closed type reaction tower 11: Main reaction tower
12: gas inlet duct 12a: straight tube portion
13: Round bending tube portion 14: Expansion tube portion
15: gas discharge duct 16: lower hopper
16a: Outlet 19: Space inside the main reaction tower
20: supports 21, 21 ': horizontal support beam
30: absorbent slurry supply means 31: injection nozzle
32: Slurry supply pipe 33a: Slurry injection area of the nozzle
33b: overlapped area 40, 40 ': work table
41: safety fence 42: supporting structure
50: gas inlet duct support fixing means 51: first support beam
53: first reinforcing beam 54: second reinforcing beam
55a: first connection link 55b: second connection link
55c: third connection link 57a: first reinforcing ring portion
57b: second reinforcing ring portion 60: reinforcing plate
61: Connection site 100: Semi-closed reaction tower
110: main reaction tower 111: reinforced binding site
112: reinforcing plate 120: vertical connecting duct
130: gas inlet duct 131: pipe connection part
140: Upper inlet pipe 141: Baffle plate
142: upper lid plate 150:
151: first gas density region 152: second gas density region
153: third gas density region 160: gas discharge duct
170: Lower hopper 171: Outlet
180: Absorbent slurry pretreatment facility 181: Absorbent storage hopper
181a: absorbent 181b: discharge pipe
182: Quantitative feeder 183: Slurry tank
183a: absorbent supply pipe 183b: water supply pipe
183c: absorbent slurry 183d: first outlet pipe
183e: second outlet pipe 184: pump
185: transfer piping 186: stirrer
186a: motors 200, 200a and 200b: semi-annular reaction tower
210: main reaction tower unit 211: reinforced binding site
212: Reaction tower inner space 213: Reinforced plate
215: tube fitting part 220: double tube structure
221: outer cylinder 221a: bottom surface
222: intermediate expansion tube portion 223: inner tube
224: rim expanding part 225: turbulent fluctuation space
226: internal space of the inner cylinder 227: gas cylinder and gap
230: Lower support part 240: Gas inlet duct
241: Horizontal tube portion 242:
243: gas mixer 245: lime powder input tube
245a: slaked powder 250: horizontal discharge guide pipe
255: inclined discharge guide pipes 252, 253: upper cover plate
260: gas exhaust duct 261:
262: pipe connecting portion 270: lower hopper
271: Exhaust port 300: Slurry supply means
310, 311, 312, 313: injection nozzle 311a: nozzle body
311a-1: sloped surface 311a-2: outer surface
311a-3: Male threaded portion 311a-4: Slurry passage
311a-5: first aperture reduction slope part 311a-6: second aperture reduction slope part
311b: Flange nut 311c: Compact spherical washer
311d: front cap 311d-1: front inclined surface
311e: front plate 311f: nozzle hole
311g: Air discharge hole 311h: Air passage
317: screw coupling part 330: absorbent slurry supply pipe
331: inside tube 331a: female thread part
340, 340a: Slurry injection area of the nozzle 341: Slurry droplet (droplet)
345: overlap region of the slurry jetting range 500, 501: gas flow line
600: horizontal type wet electrostatic precipitator 601: house dust chamber
602: dust collecting plate 602a:
604: discharge rod 605: staircase
606: Connection overpass 606a: Support beam
610: Wastewater collecting tank 620: High voltage unit
621: Damper 622: Upper fixing part
630: inlet 630a: first connecting duct
631: outlet 631a: second connecting duct
631b: third connection duct 640: support
640: Work Platform G: Floor

Claims (19)

delete delete delete delete delete delete delete delete delete A main reaction tower 210 installed upright in a vertical direction and having a cylindrical hollow space through which gas can flow;
A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside;
A lower support 230 installed at a lower portion of the dual pipe structure 220 and fixed to the ground G to support the weight of the main reaction tower 210 and the dual pipe structure 220;
And is connected to the outer cylinder 221 of the double pipe structure 220 to introduce the exhaust gas into the space between the outer cylinder 221 and the inner cylinder 223 and to perform atmospheric pollution including glass melting furnaces, coal plants, boilers, A gas inlet duct 240 for receiving the flue gas discharged from any of the material discharge facilities and introducing the flue gas into the dual pipe structure 220;
A plurality of the main reaction tower parts 210 are provided on the outer peripheral surface of the main reaction tower part 210 in the circumferential direction and spaced apart from each other at a third interval, Slurry supply means provided so as to spray a liquid in the form of a slurry toward the portion;
A horizontal discharge guide pipe 250 extending laterally outward from the side of the upper end of the main reaction tower 210; And
And a gas discharge duct (260) extending vertically downward from an end of the horizontal discharge guide pipe (250)
The double-pipe structure 220,
An outer cylinder 221 having a main reaction tower 210 continuously formed downward in the same cross-sectional shape;
The outer tube 221 is disposed in an inner space of the outer tube 221 and has a diameter 0.3 to 0.7 times the diameter of the outer tube 221 and is disposed concentrically with the outer tube 221, An inner tube 223 having a shorter length and an upper end located at a lower height than the upper end of the outer tube 221;
The diameter of the lower end portion is the same as the diameter of the inner cylinder 223 and the diameter of the upper end portion is equal to the diameter of the outer cylinder 221 so that the upper end of the inner cylinder 223 is moved upward A hollow intermediate expanding tube portion 222 having a shape gradually increasing in diameter;
The bottom end portion of the inner cylinder 223 is inclined at an angle of 15 to 60 degrees outward with respect to the outer circumferential surface of the inner cylinder 223 as a whole to form a rim having a gradually increasing circumferential length rim expanding unit 224; And
A turbulent swinging space 225 existing between the outer tube 221 and the inner tube 223 and including a space located inside the outer tube 221 as an outer space of the intermediate expanding tube part 222; Including,
The bottom surface of the double pipe structure 220 is clogged and the bottom edge of the rim expander 224 is spaced apart from the bottom surface of the double pipe structure 220 by a fourth distance,
The gas inlet duct 240 is directly connected to the outer cylinder 221 and is not connected to the inner cylinder 223 so that the exhaust gas flowing into the turbulent swinging space 225 through the gas inlet duct 240 The gas flows in the space between the inner wall surface of the outer cylinder 221 and the outer wall surfaces of the inner tube 223 and the middle expanding tube portion 222 are collided and mixed with each other and then the lower end of the rim expanding portion 224, It is possible to enter the inner space of the inner tube 223 only through the gap between the bottom surfaces of the structure 220,
The gas inlet duct 240 includes a horizontal tube portion 241 having the same diameter and extending in the horizontal direction; And an enlarged connection portion 242 extending from the horizontal tube portion 241 and extending in the circumferential direction of the outer tube 221 to enlarge an area of contact with the outer tube 221 at a portion connected to the outer tube 221, ), &Lt; / RTI &gt;
The slurry supply means may spray an alkaline slurry capable of absorbing the sulfur oxide gas in the flue gas into the main reaction tower portion 210. The sulfuric acid in the flue gas may be alkaline in the inner space of the main reaction tower portion 210, Is converted into a dried solid in contact with the slurry and the exhaust gas containing the dried solids is discharged to the outside of the main reaction tower 210 through the gas exhaust duct 260. [ Semi-automatic reaction tower with enhanced SOx removal efficiency. delete delete 11. The semi-automatic reaction tower according to claim 10, wherein the alkaline slurry is a suspension in which sodium hydroxide (NaOH) is mixed with water at a concentration of 0.1 to 10% by weight. 11. The method according to claim 10, wherein the slurry supply means (300)
The main reaction tower 210 is installed at positions spaced apart from each other along the periphery of the main reaction tower 210 and protrudes by 3 to 10 cm on the inner wall surface of the main reaction tower 210, A plurality of spray nozzles (310) for spraying the alkaline slurry in the form of a mist toward the inner space; And
And a slurry supply pipe 330 connected to the injection nozzles 310 and supplying an alkaline absorbent slurry delivered from the slurry tank 183 to the injection nozzles 310,
The nozzle hole 311f of the injection nozzle 310 is elongated in the horizontal direction and is formed in a flat shape in the vertical direction so that the slurry sprayed liquid ejected from the injection nozzle 310 is horizontally rotated by 70 to 80 ° Wherein the SOx removal efficiency is improved through improvement of the gas flow pattern, characterized in that the SOx removal efficiency is improved by spraying the SOx in the form of a fan with an angle of 10 to 20 degrees in the vertical direction. 15. The method of claim 14, wherein the slurry supply means (300) is installed separately from a plurality of stages spaced along the height direction of the main reaction tower (210)
A plurality of injection nozzles 310 belonging to one stage of the slurry supplying means 300 located at the same height are spaced apart from each other at equal intervals around the main reaction tower 210 , Which improves the SOx removal efficiency by improving the gas flow pattern. 11. The method of claim 10,
A lime powder inlet pipe 245 installed on the gas inlet duct 240 for spraying powdered slaked lime in the gas flowing in the gas inlet duct; And
The liquefied powder is introduced between the lime powder feed pipe 245 and the end of the gas inlet duct 240 so that the lime powder is uniformly dispersed in the exhaust gas before the flue gas enters the outer pipe 221 of the dual pipe structure 220. [ And a mixer (243)
Wherein the sulfur oxides in the flue gas are absorbed by the slaked flour and converted into solid gypsum. A main reaction tower 210 installed upright in a vertical direction and having a cylindrical hollow space through which gas can flow;
A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside;
A lower support 230 installed at a lower portion of the dual pipe structure 220 and fixed to the ground G to support the weight of the main reaction tower 210 and the dual pipe structure 220;
And is connected to the outer cylinder 221 of the double pipe structure 220 to introduce the exhaust gas into the space between the outer cylinder 221 and the inner cylinder 223 and to perform atmospheric pollution including glass melting furnaces, coal plants, boilers, A gas inlet duct 240 for receiving the flue gas discharged from any of the material discharge facilities and introducing the flue gas into the dual pipe structure 220;
A plurality of the main reaction tower units 210 are disposed on the outer peripheral surface of the main reaction tower unit 210 in the circumferential direction and spaced apart from each other at a fifth interval, Water supply means for spraying water toward the portion;
An inclined discharge guide pipe 255 connected to a side surface of an upper end of the main reaction tower unit 210 and extending downwardly at an angle of 20 to 70 ° with respect to a vertical direction;
A gas exhaust duct 260 extending vertically downward from an end of the incline discharge guide pipe 255;
A lime powder inlet pipe 245 installed on the gas inlet duct 240 for spraying the powdered slaked lime in the gas flowing in the gas inlet duct 240; And
The liquefied powder is introduced between the lime powder feed pipe 245 and the end of the gas inlet duct 240 so that the lime powder is uniformly dispersed in the exhaust gas before the flue gas enters the outer pipe 221 of the dual pipe structure 220. [ And a mixer (243)
The double-pipe structure 220,
An outer cylinder 221 having a main reaction tower 210 continuously formed downward in the same cross-sectional shape;
The outer tube 221 is disposed in an inner space of the outer tube 221 and has a diameter 0.3 to 0.7 times the diameter of the outer tube 221 and is disposed concentrically with the outer tube 221, An inner tube 223 having a shorter length and an upper end located at a lower height than the upper end of the outer tube 221;
The diameter of the lower end portion is the same as the diameter of the inner cylinder 223 and the diameter of the upper end portion is equal to the diameter of the outer cylinder 221 so that the upper end of the inner cylinder 223 is moved upward A hollow intermediate expanding tube portion 222 having a shape gradually increasing in diameter;
The bottom end portion of the inner cylinder 223 is inclined at an angle of 15 to 60 degrees outward with respect to the outer circumferential surface of the inner cylinder 223 as a whole to form a rim having a gradually increasing circumferential length rim expanding unit 224; And
A turbulent swinging space 225 existing between the outer tube 221 and the inner tube 223 and including a space located inside the outer tube 221 as an outer space of the intermediate expanding tube part 222; Including,
The bottom surface of the double pipe structure 220 is clogged and the bottom edge of the rim expander 224 is spaced apart from the bottom surface of the double pipe structure 220 by a fourth distance,
The gas inlet duct 240 is directly connected to the outer cylinder 221 and is not connected to the inner cylinder 223 so that the exhaust gas flowing into the turbulent swinging space 225 through the gas inlet duct 240 The gas flows in the space between the inner wall surface of the outer cylinder 221 and the outer wall surfaces of the inner tube 223 and the middle expanding tube portion 222 are collided and mixed with each other and then the lower end of the rim expanding portion 224, It is possible to enter the inner space of the inner tube 223 only through the gap between the bottom surfaces of the structure 220,
The gas inlet duct 240 includes a horizontal tube portion 241 having the same diameter and extending in the horizontal direction; And an enlarged connection portion 242 extending from the horizontal tube portion 241 and extending in the circumferential direction of the outer tube 221 to enlarge an area of contact with the outer tube 221 at a portion connected to the outer tube 221, ), &Lt; / RTI &gt;
The sulfur oxides in the flue gas flowing in the gas inlet duct 240 are absorbed by the slaked flour and converted into solid gypsum. The flue gas containing the gypsum solid is passed through the gas discharge duct 260 to the outside of the main reaction tower 210 Wherein the SOx removal efficiency is improved by improving the gas flow pattern. A main reaction tower 210 installed upright in a vertical direction and having a cylindrical hollow space through which gas can flow;
A dual pipe structure 220 located at the lower portion of the main reaction tower 210 and having two hollow cylinders concentrically arranged in the inside and outside;
A lower support 230 installed at a lower portion of the dual pipe structure 220 and fixed to the ground G to support the weight of the main reaction tower 210 and the dual pipe structure 220;
And is connected to the outer cylinder 221 of the double pipe structure 220 to introduce the exhaust gas into the space between the outer cylinder 221 and the inner cylinder 223 and to perform atmospheric pollution including glass melting furnaces, coal plants, boilers, A gas inlet duct 240 for receiving the flue gas discharged from any of the material discharge facilities and introducing the flue gas into the dual pipe structure 220;
A plurality of the main reaction tower parts 210 are provided on the outer peripheral surface of the main reaction tower part 210 in the circumferential direction and spaced apart from each other at a third interval, Slurry supply means provided so as to spray a liquid in the form of a slurry toward the portion;
An inclined discharge guide pipe 255 connected to a side portion of an upper end of the main reaction tower 210 and extending downwardly at an angle of 20 to 70 ° with respect to a vertical direction;
A gas exhaust duct 260 extending vertically downward from an end of the incline discharge guide pipe 255;
A lime powder inlet pipe 245 installed on the gas inlet duct 240 for spraying the powdered slaked lime in the gas flowing in the gas inlet duct 240; And
The slag powder is disposed between the position where the lime powder feed pipe 245 is installed and the end of the gas inlet duct 240 so that the slag powder is uniformly discharged into the exhaust pipe 221 before the flue gas enters the outer pipe 221 of the dual pipe structure portion 220 And a gas mixer (243)
The double-pipe structure 220,
An outer cylinder 221 having a main reaction tower 210 continuously formed downward in the same cross-sectional shape;
The outer tube 221 is disposed in an inner space of the outer tube 221 and has a diameter 0.3 to 0.7 times the diameter of the outer tube 221 and is disposed concentrically with the outer tube 221, An inner tube 223 having a shorter length and an upper end located at a lower height than the upper end of the outer tube 221;
The diameter of the lower end portion is the same as the diameter of the inner cylinder 223 and the diameter of the upper end portion is equal to the diameter of the outer cylinder 221 so that the upper end of the inner cylinder 223 is moved upward A hollow intermediate expanding tube portion 222 having a shape gradually increasing in diameter;
The bottom end portion of the inner cylinder 223 is inclined at an angle of 15 to 60 degrees outward with respect to the outer circumferential surface of the inner cylinder 223 as a whole to form a rim having a gradually increasing circumferential length rim expanding unit 224; And
A turbulent swinging space 225 existing between the outer tube 221 and the inner tube 223 and including a space located inside the outer tube 221 as an outer space of the intermediate expanding tube part 222; Including,
The bottom surface of the double pipe structure 220 is clogged and the bottom edge of the rim expander 224 is spaced apart from the bottom surface of the double pipe structure 220 by a fourth distance,
The gas inlet duct 240 is directly connected to the outer cylinder 221 and is not connected to the inner cylinder 223 so that the exhaust gas flowing into the turbulent swinging space 225 through the gas inlet duct 240 The gas flows in the space between the inner wall surface of the outer cylinder 221 and the outer wall surfaces of the inner tube 223 and the middle expanding tube portion 222 are collided and mixed with each other and then the lower end of the rim expanding portion 224, It is possible to enter the inner space of the inner tube 223 only through the gap between the bottom surfaces of the structure 220,
The gas inlet duct 240 includes a horizontal tube portion 241 having the same diameter and extending in the horizontal direction; And an enlarged connection portion 242 extending from the horizontal tube portion 241 and extending in the circumferential direction of the outer tube 221 to enlarge an area of contact with the outer tube 221 at a portion connected to the outer tube 221, ), &Lt; / RTI &gt;
The sulfur oxides in the exhaust gas flowing through the gas inlet duct 240 are primarily absorbed by the slaked powder and converted into solid gypsum,
The slurry supply means may spray the alkaline slurry capable of absorbing the sulfur oxide gas in the flue gas into the main reaction tower portion 210 so that the sulfur oxides in the flue gas are secondarily injected into the main reaction tower portion 210 And the exhaust gas containing the dried solids is discharged to the outside of the main reaction tower 210 through the gas discharge duct 260. The gas flow pattern of the gas flow pattern Semi-automatic reaction tower with improved SOx removal efficiency through improvement. delete

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