KR101508268B1 - Boiler System for Petro Coke with Dry Scrubber and Dust Collector Equipment - Google Patents

Abstract

The present invention relates to a dry desulfurization and dust collecting apparatus for a petroleum coke refined powder combustion boiler, which comprises a petroleum coke refined powder boiler in which a petroleum coke refined powder and a bunker-C oil are mixed and supplied, and an injector for injecting an alkali absorbent into the denitrification gas discharged during combustion 111), an absorber (110) for removing and discharging sulfur oxides contained in the flue gas by the sprayed alkali absorbent; An alkali absorbent supply part 120 for supplying an alkali absorbent for removing sulfur oxides; A dust collecting part 130 for collecting the alkali absorbent absorbed in the flue gas from which sulfur oxides have been removed and absorbing the scattered sulfur oxides and discharging the purified air; .

In the present invention, sulfur oxides (SOx) are removed using a dry desulfurization apparatus using an alkali absorbent to improve the removal efficiency of sulfur oxides (SOx) generated in the combustion of petroleum coke refined powder, No wastewater is generated, no wastewater treatment plant is required, the white smoke is completely controlled, no reheating is required, operation and maintenance costs are low, and odor can be completely treated. As a result, refined petroleum coke powder, which is a low sulfur fuel, can be used as fuel for the boiler.

Petroleum coke, refined powder, bunker-C oil, boiler, dry desulfurization

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry desulfurization and dust collecting apparatus for a petroleum coke refined powder combustion boiler,

The present invention relates to a dry desulfurization and dust collecting apparatus for a petroleum coke refined powder combustion boiler, which uses refined petroleum coke (Petro Coke) powder as a fuel for a boiler to improve the removal efficiency of SOx generated during combustion.

Generally, boilers used for thermal power plants, cogeneration power plants, etc. use heavy oil or coal such as Bunker-C oil. Bunker-C oil has the disadvantage of high calorific value but high price compared to coal, and coal has a lower calorific value than Bunker-C oil, but it is cheaper.

Research has been conducted on a method of mixing coal with Bunker-C oil. However, the use of high-boiling coal having increased heat of coal results in incomplete combustion of the Bunker-C oil, And it is practically impossible to utilize coal.

In addition, when the coal is combusted in the fluidized bed, the fuel injected into the fluidized bed is mixed with the highest amount in the fluidized bed having the highest heat content. Therefore, the combustion characteristics are low compared to other combustion apparatuses, (NOx), which is a pollutant, is suppressed and there is no problem of being accompanied by high-temperature combustion such as ash melting, and addition of an additive capable of removing sulfur oxides into the combustion furnace removes SOx generated However, there are many burning debris and additional equipment is required to remove it.

On the other hand, petroleum coke (petroleum coke), which is a low-grade fuel, is a porous, glossy coke made by pyrolyzing petroleum residue vigorously.

When PetroCork is used as fuel for boilers, gas emitted from boilers using petroleum coke fuel contains a large amount of gaseous pollutant (SOx) and particulate pollutant dust (Dust).

When removing such oil coke in conventional wet desulfurization unit (Wet Scrubber) to remove sulfur oxides from the flue gas discharged from a boiler as a fuel gas desulfurization efficiency was numerically, but can emerge with high efficiency, fine sulfur oxides (SO ₃ ) It is not possible to collect the particles, and the mists are scattered to produce blue smoke (also called white smoke, aftermath, etc.) and there is a complaint, and when the low pressure is low, And so on. In addition, since the wet desulfurization system generates wastewater, a wastewater treatment facility for treating the wastewater generated is necessarily required, which requires a lot of installation and operation costs, and there is a concern that corrosion is likely to occur.

In addition, in the case of a general semi-dry type plant for removing sulfur oxides, waste water is not generated compared to a wet type plant, while sulfur oxide removal efficiency is as low as 80 to 85%. It is difficult to apply it to large-scale boiler because it has low efficiency of removing sulfuric oxide. However, it is applied to small-scale boiler because it does not generate wastewater.

Thus, in order to use the proprietary sulfur Petrocoke refined powder as a fuel, a desulfurization technique for efficiently removing sulfur oxides by 95% or more is required.

Until now, the coal combustion process using fluidized bed has been mainly used in the United States, Great Britain, Germany, Australia, etc. for energy recovery for petroleum coke (petroleum coke) (SOx), nitrous oxide (NOx), and the like.

It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a petroleum coke refined powder which is an inherent sulfur low-grade fuel and which can improve the removal efficiency of sulfur oxides (SOx) And to provide a dry desulfurization and dust collecting facility for a coke refined powder combustion boiler.

It is another object of the present invention to provide a petroleum coke refined petroleum coke refinery which is free from the occurrence of by-products during the removal of sulfur oxides contained in the flue gas generated in the combustion of petroleum coke refined powder combustion boiler, And to provide a dry desulfurization and dust collecting facility for a powder combustion boiler.

The present invention relates to a dry desulfurization and collecting system for a petroleum coke refined powder combustion boiler, which comprises a mixture of refined petroleum coke powder and Bunker-C oil, which is combusted to generate steam by the heat of combustion and discharge the discharged flue gas, A sprayer 111 provided at the downstream of the denitrification gas discharge unit 60 of the petroleum coke purifier powder boiler from which the denitrification flue gas from which the nitrogen oxide is removed is injected for spraying the alkali absorbent into the denitrification flue gas, An absorber 110 for removing and discharging sulfur oxides contained in the flue gas; An alkali absorbent supply part 120 for supplying an alkali absorbent for removing sulfur oxides to the injector 111 of the absorption part 110; A dust collecting part 130 which is contained in the flue gas from which the sulfur oxides are removed by the absorption part 110 and collects the alkali absorbent absorbed by the scattered sulfur oxide to discharge purified air; And a control unit.

The alkali absorbent supply unit 120 is characterized by supplying calcium hydroxide (Ca (OH) ₂ ) slurry to the injector 111.

The alkali absorbent supply part 120 includes a water tank 121, a calcium oxide powder storage tank 122 for storing calcium oxide (CaO) powder, a calcium oxide powder storage tank 122 for storing the calcium oxide supplied from the calcium oxide powder storage tank 122, A calcium hydroxide aqueous solution storage tank 123 for storing a reacted aqueous solution of calcium hydroxide (Ca (OH) ₂ ) by supplying powder and water supplied from the water tank 121, and a calcium hydroxide aqueous solution storage tank 123 for storing calcium hydroxide A calcium hydroxide slurry separator 124 for separating the calcium hydroxide slurry from the aqueous solution and a calcium hydroxide slurry storage tank 125 for storing the calcium hydroxide slurry separated from the calcium hydroxide slurry separator 124 and supplying the slurry to the sprayer 111 .

The alkali absorbent storage tank 141 stores a part of the alkali absorbent collected in the dust collecting unit 130 and the alkali absorbent supplied from the storage alkali absorbent storage tank 141 and the water A regeneration alkali sorbent aqueous solution storage tank 142 for storing the regenerated alkali sorbent aqueous solution which has been reacted by supplying the regenerated alkali sorbent aqueous solution and the regenerated alkali sorbent aqueous solution supplied from the regenerated alkali sorbent aqueous solution storage tank 142, And a regenerated alkali absorbent slurry storage tank 144 for storing the regenerated alkali absorbent slurry separated from the regenerated alkali absorbent slurry separator 143 and the regenerated alkali absorbent slurry separator 143 and supplying the regenerated alkali absorbent slurry to the injector 111 And an absorber recycling apparatus (140). It shall be.

The head tank 145 for mixing and storing the slurry of calcium hydroxide supplied from the calcium hydroxide slurry storage tank 125 and the regenerated alkali absorbent slurry supplied from the regenerated alkali absorbent slurry storage tank 144 and supplying the slurry to the injector 111 ). ≪ / RTI >

The regenerated alkali sorbent aqueous solution storage tank 142 and the regenerated alkaline sorbent slurry storage tank 144 and the head tank 145 are connected to each other through the above- And are further provided with agitators 123a, 125a, 142a, 144a, and 145a, respectively.

In addition, the purity of the calcium oxide (CaO) powder is 90% or more and the particle size is 200 mesh or more.

Further, the injector 111 is characterized in that it is sprayed with fine droplets having a diameter of 10 to 50 mu m.

In the present invention, sulfur oxides (SOx) are removed using a dry desulfurization apparatus using an alkali absorbent to improve the removal efficiency of sulfur oxides (SOx) generated in the combustion of petroleum coke refined powder, No wastewater is generated, no wastewater treatment plant is required, the white smoke is completely controlled, no reheating is required, operation and maintenance costs are low, and odor can be completely treated. As a result, refined petroleum coke powder, which is a low sulfur fuel, can be used as fuel for the boiler.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dry desulfurization and collection system for a petroleum coke refined powder combustion boiler according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of a petroleum coke refined powder combustion boiler equipped with a dry desulfurization and dust collecting apparatus according to the present invention.

As shown in the figure, the petroleum coke refined powder combustion boiler according to the present invention comprises a petroleum coke refined powder supply unit 10 for supplying refined petroleum coke powder; A bunker-C oil feeder 20 for supplying bunker-C oil; A burner 30 for mixing the petroleum coke refined powder and the Bunker-C oil mixed and supplied and igniting and burning; A boiler (40) having a combustor (41) for combusting refined petroleum coke powder, bunker-C oil, and a steam generating portion (42) for generating steam by heating water; A denitration unit 50 for removing nitrogen oxides contained in the discharged flue gas; And a dry desulfurization and dust collecting apparatus (100) for spraying an alkali absorbent to a flue gas to remove sulfur oxides contained in the flue gas, remove odors, and collect fine sulfur oxides; .

The petroleum coke refined powder supply unit 10 supplies powder obtained by refining petroleum coke which is a porous glossy coke which is produced by pyrolyzing (distillation) of petroleum residue vigorously (dry distillation) .

The bunker-C oil feeder 20 supplies bunker-C oil. Petro Coke Refining Bunker-C is required to burn powder.

The petroleum coke refined powder supply unit 10 supplies a fixed amount to the burner 30 in the silo and the silo for storing the petroleum coke refined powder because the petroleum coke is in powder form A bunker-C oil reservoir and a feeder are required because bunker-C oil is mixed.

The petroleum coke refined powder supplied from the petroleum coke purified powder feeder 10 and the bunker-C oil feeder 20 and the bunker-C oil are fed to the burner 30. At this time, the mixing ratio of the petroleum coke refined powder and the Bunker-C oil is preferably 50 to 90: 50 to 10 (volume ratio).

The petroleum coke refined powder and Bunker-C oil which are joined and fed to the burner 30 are ignited and burned in the combustor 41. It is preferable that the LPG gas supply unit 11 supplies LPG gas to the petroleum coke refined powder supply unit 10 to assist initial ignition of the burner 30.

First, during the initial operation of the boiler, a small amount of LPG is used to ignite the Bunker-C oil. When the temperature of the combustion chamber becomes constant due to the combustion heat of the ignited Bunker-C oil, the amount of the petroleum coke refined powder may vary. The basic design is based on mixing 30% of bunker-C oil and 70% of petroleum coke refined powder.

The boiler 40 includes a combustor 41 for combusting petroleum coke refined powder and Bunker-C oil by ignition of the burner 30, and a steam generator 40 for generating steam by heating the water supplied to the combustion heat of the combustor 41 A steam generating portion 42 is provided.

When the fuel burns, the boiler uses the heat of combustion to convert the supplied water into steam. The generated steam can be used for electric power production, and steam itself is used in the production process.

Since the petroleum coke refined powder is a solid fuel, a large amount of fly ash is generated, and a dust discharging device is installed in the lower part of the boiler.

As described above, according to the present invention, by using the petroleum coke refined powder as the fuel of the boiler, it is possible to reduce the amount of dust generated when coal is used and the amount of fuel used can be reduced because the calorific value is larger than that of coal. When using coal, the amount of dust generated is about 2 to 4 times as much as that of using petroleum coke refined powder. In addition, the calorific value of Petro Coke refined powder is about 8,000 kcal / hr and the calorific value of coal is 6,300 kcal / hr.

In addition, the refined petroleum coke powder contains sulfur components in the fuel components, so that sulfur oxides (SOx) are generated in the exhaust gas during combustion, and nitrogen oxides (NOx) are generated due to the use of external air as the combustion air. Therefore, a desulfurization facility and a dust collecting facility are required to remove a high sulfur component which requires a denitration facility.

The present invention uses a denitrification facility and a wet desulfurization facility to satisfy desulfurization and dust collection facilities that can be treated as a single facility and satisfy the air pollutant emission concentration standards to be reinforced.

The denitration unit (50) removes nitrogen oxides contained in the flue gas discharged from the combustor (41). At this time, the denitrification apparatus 50 uses the SCR method to satisfy the air pollutant emission concentration standard to be reinforced. The SCR system is a system in which nitric oxide (NOx) in flue gas is converted to nitrogen gas (N ₂ ) by passing through a catalyst column using any one of reducing agents selected from ammonia (NH ₃ ), carbon monoxide (CO) and hydrocarbons. The catalyst used here is a known one for removing nitrogen oxides.

An air preheater 55 provided at the rear end of the denitration unit 50 for increasing the combustion efficiency of the burner 30 and performing heat exchange with the flue gas discharged from the denitration unit 50 to preheat the burner 30 .

The dry desulfurization and dust collecting facility 100 is provided at a downstream end of the denitrification gas discharge unit 60 from which nitrogen oxides are removed from the petroleum coke purified powder boiler discharged from the denitration unit 50 by removing the nitrogen oxides, The alkali sorbent is injected into the gas to remove the sulfur oxides contained in the denitrification gas, remove odors, and collect fine sulfur oxides.

The construction of the dry desulfurization and dust collecting facility 100 will be described in detail as follows.

FIG. 2 is a view showing a detailed structure of a dry desulfurization and dust collecting apparatus for a petroleum coke refined powder combustion boiler according to the present invention.

As shown in the drawing, the dry desulfurization and dust collecting apparatus 100 for a petroleum coke purifier powder-fired boiler according to the present invention includes a sprayer 111 for spraying an alkali absorbent into a denitrification flue gas, An absorber 110 for removing sulfur oxides and discharging the sulfur oxides; An alkali absorbent supply part 120 for supplying an alkali absorbent for removing sulfur oxides; A dust collecting part 130 which is contained in the flue gas from which sulfur oxides have been removed and which collects the scattered alkali absorbent absorbing sulfur oxides and discharges the purified air; .

The absorber 110 is provided with an injector 111 for injecting an alkali absorbent into the denitrification flue gas and removes and discharges sulfur oxides contained in the flue gas by the injected alkali absorbent.

The injector 111 injects the alkali absorbent into the fine droplets. The fine droplets of the alkali absorbent sprayed by the injector 111 combine with sulfur oxides (SOx) contained in the denitrification flue gas to remove sulfur oxides. The injector 111 is positioned at the upper center of the absorber 110 and is injected into the denitrification flue gas introduced to increase the surface area, thereby promoting the reaction with the alkali absorbent to increase the sulfuric acid absorption efficiency of the flue gas.

At this time, the droplet size of the alkali absorbent sprayed by the injector 111 is preferably 10 to 50 mu m in diameter. If the droplet size is too large, the surface area of the droplet is narrowed and the removal efficiency of sulfur oxide is low, so that it is preferable to have a small droplet size.

As described above, according to the present invention, the droplet size of the alkali absorbent injected by the injector is sprayed into fine droplets having a diameter of 10 to 50 탆, which makes it possible to increase the removal efficiency of sulfur oxides as compared with the conventional semi-dry desulfurization equipment. The cargo removal efficiency is obtained.

The alkali absorbent supply unit 120 serves to supply an alkali absorbent for removing sulfur oxides to the injector 111 of the absorption unit 110. At this time, the alkali absorbent supply part 120 supplies calcium hydroxide (Ca (OH) ₂ ) slurry to the injector 111. At this time, the calcium hydroxide (Ca (OH) ₂ ) slurry is obtained by separating calcium oxide (Ca (OH) ₂ ) aqueous solution combined with calcium oxide (CaO) powder and water.

A structure for supplying calcium hydroxide (Ca (OH) ₂ ) slurry in the alkali absorbent supply part 120 includes a water tank 121, a calcium oxide powder storage tank 122 for storing calcium oxide (CaO) A calcium hydroxide aqueous solution storage tank 123 for storing an aqueous solution of calcium hydroxide (Ca (OH) ₂ ) supplied by supplying the calcium oxide powder supplied from the calcium oxide powder storage tank 122 and the water supplied from the water tank 121, And a calcium hydroxide slurry separator 124 for separating the calcium hydroxide slurry from the aqueous calcium hydroxide solution supplied from the aqueous calcium hydroxide solution storage tank 123 and supplying the separated calcium hydroxide slurry to the injector 111. The calcium hydroxide slurry separator 124 serves to separate the calcium hydroxide slurry having a large particle size.

At this time, the purity of the calcium oxide (CaO) powder is preferably 90% or more and the particle size is preferably 200 mesh or more. If the particle size of the calcium oxide powder is large, calcium oxide powder is not completely dissolved in the water supplied from the water tank 121, so that the smaller the particle size, the more advantageous it is.

The harmful gas (sulfur oxide) of the acid component contained in the denitrification flue gas is reacted with the alkali absorbent slurry and absorbed and neutralized with CaSO₃ / CaSO4. At this time, since moisture is evaporated by the heat of the flue gas, there is no generation of waste water.

The reaction of the harmful gas in the absorber 110 is as follows.

SO ₂ + Ca (OH) _{2 -} > CaSO ₃ / CaSO ₄ + H ₂ O

SO ₃ + Ca (OH) _{2 -} > CaSO ₄ + H ₂ O

The reaction product produced by the reaction of the noxious gas and the alkali absorbent slurry falls to the lower portion of the absorption portion 110. In this case, since the reaction product is generated as a dried solid material, there is no fear of corrosion, and therefore, it is possible to reduce the capital investment cost since it is not necessary to use the corrosion-resistant material as in the conventional wet processing equipment.

The alkali absorbent slurry is injected from the absorber 110 to lower the temperature of the flue gas. Therefore, the flue gas having a decreased temperature is reduced in volume as the actual temperature is lowered, and is introduced into the dust collector 130 at an appropriate temperature .

The flue gas processed in the absorber 110 includes a large amount of fugitive dust and salt, and flows into the dust collecting unit 130 for another process.

The dust collecting part 130 is contained in the flue gas from which the sulfur oxides are removed by the absorption part 110 and collects the scattered dust to discharge the purified air. At this time, the dust includes an alkali absorbent which is not reacted with sulfur oxides in the absorber 110.

The recycled alkali absorbent recycling apparatus 140 is further provided so as to reduce the cost by reducing the amount of the alkali absorbent supplied from the alkali absorbent supply unit 120 by recycling a part of the alkali absorbent collected in the dust collecting unit 130 desirable.

The reclaimed alkali absorbent recycling apparatus 140 includes a collecting alkali absorbent storage tank 141 for storing a part of the alkali absorbent collected in the dust collecting unit 130 and an alkaline absorbent supplied from the collecting alkali absorbent storage tank 141 A regenerated alkali absorbent aqueous solution storage tank 142 for supplying the water supplied from the water tank 121 and storing the reacted aqueous alkali solution of regenerated alkali absorbent; A regenerated alkali absorbent slurry separator 143 for separating the regenerated alkali absorbent slurry from the regenerated alkali absorbent slurry separator 143 and a regenerated alkali absorbent slurry separator 143 for separating the regenerated alkali absorbent slurry from the regenerated alkali absorbent slurry separator 143, (144). The regenerated alkali sorbent slurry separator 143 serves to separate the regenerated alkali sorbent slurry having a large particle size, similarly to the calcium hydroxide slurry separator 124 described above.

If the regenerated alkali absorbent slurry obtained by regenerating the alkali absorbent collected in the dust collecting unit 130 is used, the required amount of the alkali absorbent can be reduced and the cost can be reduced.

The head tank 145 for mixing and storing the slurry of calcium hydroxide supplied from the calcium hydroxide slurry storage tank 125 and the regenerated alkali absorbent slurry supplied from the reclaimed alkali absorbent slurry storage tank 144 and supplying the slurry to the injector 111 ). ≪ / RTI >

The regenerated alkali absorbent slurry storage tank 144 and the head tank 145 are connected to each other by a separate water supply pipe 130. The water storage tank 123, the calcium hydroxide slurry storage tank 125, the regenerated alkali absorbent aqueous solution storage tank 142, And further includes agitators 123a, 125a, 142a, 144a, and 145a, respectively, to prevent the alkali absorbent from being mixed evenly and precipitating and sinking.

The dry desulfurization and dust collecting apparatus 100 of the present invention having the above-described structure processes the high concentration of sulfur oxides with high efficiency, does not require corrosion protection, does not require preservative materials, does not generate wastewater, And the white smoke is completely controlled, so there is no need for reheating, so that the operation and maintenance costs are reduced, and the odor can be completely treated.

The purified air collected by the dust collecting unit 130 is discharged to the atmosphere through a stack 150. The stack 150 finally collects dust that has not been collected by the dust collecting unit 130 and discharges the purified air.

The control unit is a part for directly operating the operation of the dry desulfurization and dust collecting facility and can be operated automatically or manually in the control panel.

The controller can automatically adjust the injection amount of the alkali sorbent in the injector 111 according to the exhaust gas temperature and the concentration of the harmful gas to be discharged, and the amount of the sorbent injected can be automatically adjusted according to the amount of gas in response to the load variation of the boiler. In addition, optimum spraying, absorption and drying of the alkali absorbent are determined and controlled.

The dry desulfurization and dust collecting facility of the present invention is easier to operate and stop than the wet desulfurization facility.

Completely treated clean gas discharged into the atmosphere through the stack can be used for various types of pollution such as flow measurement and recording apparatus, dust analyzer, oxygen (O ₂ ), sulfur oxides (SOx) A substance meter can be attached to monitor the treatment status in the control panel, as well as to prevent the discharge of gas exceeding the emission limit by recognizing the alarm to the driver with an alarm or other warning if the treatment result is bad.

As described above, according to the present invention, the desulfurization process and the dust are collected using the dry desulfurization and dust collecting facility, thereby improving the removal efficiency of SOx generated in the combustion of the petroleum coke refined powder combustion boiler, and the white smoke And the odor is completely treated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a petroleum coke refined powder combustion boiler equipped with a dry desulfurization and dust collecting apparatus according to the present invention; FIG.

2 is a view showing a detailed structure of a dry desulfurization and dust collecting apparatus for a petroleum coke refined powder combustion boiler according to the present invention.

Description of the Related Art [0002]

10: petroleum coke refined powder supply part 11: LPG gas supply part

20: Bunker-C oil feeder 30: Burner

40: boiler 41: combustor

42: steam generator 50: denitration device

55: air preheater 60: denitrification gas discharge unit

100: a dry desulfurization and dust collecting facility 110:

111: Injector 120: Alkali absorbent supply part

121: water tank 122: calcium oxide powder storage tank

123: calcium hydroxide aqueous solution storage tank 124: calcium hydroxide slurry separator

125: calcium hydroxide slurry storage tank 130:

140: Recycled alkaline sorbent recycling device

141: Alkaline absorbent storage tank

142: Reclaimed alkali absorbent aqueous solution storage tank

143: Regenerated alkali absorbent slurry separator

144: Reclaimed alkali absorbent slurry storage tank

145: Head tank

123a, 125a, 142a, 144a, 145a:

150: Stack

Claims (8)

A petroleum coke refined powder in which a denitrification flue gas from which nitrogen oxides contained in discharged flue gas is removed is discharged by discharging the flue gas generated by combustion heat and generating steam by burning supplied with a mixture of refined petroleum coke powder and Bunker- Is provided at the rear end of the denitrification gas discharge unit (60) of the boiler, An absorber 110 having an injector 111 for injecting an alkali absorbent into the denitrification flue gas and removing sulfur oxides contained in the flue gas by the injected alkali absorbent and discharging the sulfur oxide; An alkali absorbent supply part 120 for supplying an alkali absorbent for removing sulfur oxides to the injector 111 of the absorption part 110; And A dust collecting part 130 contained in the flue gas from which the sulfur oxides have been removed by the absorption part 110 and collecting the scattered alkali absorbent absorbing sulfur oxides and discharging purified air; , ≪ / RTI > The alkali absorbent supply unit 120 supplies a calcium hydroxide (Ca (OH) ₂ ) slurry to the injector 111, The alkali absorbent supply unit 120 includes a water tank 121, a calcium oxide powder storage tank 122 for storing calcium oxide (CaO) powder, a calcium oxide powder supplied from the calcium oxide powder storage tank 122, A calcium hydroxide aqueous solution storage tank 123 for storing an aqueous solution of calcium hydroxide (Ca (OH) ₂ ) reacted with water supplied from the water tank 121 and an aqueous calcium hydroxide solution supplied from the aqueous calcium hydroxide solution storage tank 123 A calcium hydroxide slurry separator 124 for separating the calcium hydroxide slurry and a calcium hydroxide slurry storage tank 125 for storing the calcium hydroxide slurry separated from the calcium hydroxide slurry separator 124 and supplying the slurry to the sprayer 111 Dry desulfurization and dust collection equipment for petroleum coke refined powdered combustion boilers. delete delete The method according to claim 1, A collection alkali sorbent storage tank 141 for storing a part of the alkali sorbent collected in the dust collecting unit 130 and an alkali sorbent supplied from the collection alkali sorbent storage tank 141 and a water supplied from the water tank 121 A regenerated alkali sorbent aqueous solution storage tank 142 for storing the regenerated alkali sorbent aqueous solution and a regenerated alkali sorbent aqueous solution storage tank 142 for supplying the regenerated alkali sorbent slurry from the regenerated alkali sorbent aqueous solution supplied from the regenerated alkali sorbent aqueous solution storage tank 142, And a regenerated alkali absorbent slurry storage tank (144) for storing the regenerated alkali absorbent slurry separated from the regenerated alkali sorbent slurry separator (143) and supplied to the injector (111) Further comprising a device (140) Dry desulfurization dust collector for petroleum coke refined powdered combustion boiler. 5. The method of claim 4, A head tank 145 for mixing and storing the slurry of calcium hydroxide supplied from the calcium hydroxide slurry storage tank 125 with the regenerated alkali absorbent slurry supplied from the regenerated alkali absorbent slurry storage tank 144 and supplying the slurry to the injector 111 Wherein the dry desulfurization and dust collecting equipment for the petroleum coke refined powder combustion boiler further comprises: 6. The method of claim 5, The regenerated alkali absorbent slurry storage tank 123 and the regenerated alkali absorbent slurry storage tank 125 and the regenerated alkali absorbent aqueous solution storage tank 142 and the regenerated alkali absorbent slurry storage tank 144 and the head tank 145 And further comprises agitators (123a) (125a) (142a) (144a) and (145a) for desulfurizing dust collecting equipment for petroleum coke refined powder combustion boilers. The method according to claim 1, Wherein the calcium oxide (CaO) powder has a purity of 90% or more and a particle size of 200 mesh or more. 7. The method according to any one of claims 1, 4, 5, 6, and 7, Wherein the injector (111) is sprayed with fine droplets having a diameter of 10 to 50 탆.

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