WO2020013399A1 - Method for treating sintering flue gas desulfurization by-product - Google Patents
Method for treating sintering flue gas desulfurization by-product Download PDFInfo
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- WO2020013399A1 WO2020013399A1 PCT/KR2018/015327 KR2018015327W WO2020013399A1 WO 2020013399 A1 WO2020013399 A1 WO 2020013399A1 KR 2018015327 W KR2018015327 W KR 2018015327W WO 2020013399 A1 WO2020013399 A1 WO 2020013399A1
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- WIPO (PCT)
- Prior art keywords
- product
- flue gas
- water
- sodium sulfate
- products
- Prior art date
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- 239000006227 byproduct Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 31
- 230000023556 desulfurization Effects 0.000 title claims abstract description 31
- 238000005245 sintering Methods 0.000 title abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910001868 water Inorganic materials 0.000 claims abstract description 47
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 44
- 239000011259 mixed solution Substances 0.000 claims abstract description 34
- HFCSXCKLARAMIQ-UHFFFAOYSA-L disodium;sulfate;hydrate Chemical compound O.[Na+].[Na+].[O-]S([O-])(=O)=O HFCSXCKLARAMIQ-UHFFFAOYSA-L 0.000 claims abstract description 28
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 22
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 18
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 17
- 239000000047 product Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 9
- 229910052801 chlorine Inorganic materials 0.000 claims description 9
- -1 chlorine ions Chemical class 0.000 claims description 8
- 239000011780 sodium chloride Substances 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 241000251468 Actinopterygii Species 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000008719 thickening Effects 0.000 claims 1
- 235000017550 sodium carbonate Nutrition 0.000 description 17
- 239000002699 waste material Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000002639 sodium chloride Nutrition 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HDFXRQJQZBPDLF-UHFFFAOYSA-L disodium hydrogen carbonate Chemical compound [Na+].[Na+].OC([O-])=O.OC([O-])=O HDFXRQJQZBPDLF-UHFFFAOYSA-L 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B1/00—Dumping solid waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B1/00—Dumping solid waste
- B09B1/008—Subterranean disposal, e.g. in boreholes or subsurface fractures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Definitions
- the present invention relates to a method for treating sintered flue gas desulfurization by-products. More specifically, the present invention relates to a method for treating sintered flue gas desulfurization by-products which can reduce landfill costs by recycling or reusing sintered flue gas desulfurization by-products classified as general waste.
- heavy tank ( ⁇ ⁇ 0 3 ) is used as a desulfurization agent to remove 30) (generated from the flue gas line). After desulfurization, all the dust generated is classified as general waste and landfilled.
- the estimated amount of desulfurized dust generated is about 70,000 tons per year, and the cost burden is high due to the continuous increase in landfill costs due to lack of landfill. Therefore, if it is possible to switch back to soda ash or mid-bath through the development of regeneration technology through dry or wet method, it can be recycled in sintering process or used in steel making process, which can reduce landfill cost and improve cost competitiveness through new profit creation.
- soda ash and sodium bicarbonate are regenerated by wet treatment using the Solvay method.
- the molten ash is melted at high temperature in parallel with the dry and wet treatment, and then eluted in an aqueous solution. I want to switch the use of.
- the present invention provides a method for treating sintered flue gas desulfurization by-products which can reduce landfill costs by recycling sintered flue gas desulfurization by-products classified as general wastes or converting their use.
- Sintered flue gas desulfurization by-product treatment method comprises the steps of mixing the by-products including sodium carbonate and sodium sulfate with water; remind 2020/013399 1 »(: 1 ⁇ 1 ⁇ 2018/015327
- Preparing a mixed solution by mixing the byproduct mixed with water with sulfuric acid; Adjusting the temperature of the mixed solution to precipitate sodium sulfate hydrate; Separating the precipitated sodium sulfate hydrate from the mixed solution; And concentrating and drying the sodium sulfate hydrate to recover a product containing sodium sulfate.
- filtering impurities from the by-products mixed with the water may further include.
- After mixing the by-products with sulfuric acid to prepare a mixed solution, collecting the carbon dioxide generated by the reaction of the by-products and the sulfuric acid; may further include.
- the carbon dioxide may be generated by the reaction of carbonate ion ( ⁇ 3 is with sulfuric acid in the by-product mixed with the water.
- the by-products may include 10 to 40% by weight sodium carbonate, 50 to 85% by weight sodium sulfate and 1 to 10% by weight sodium chloride.
- the weight ratio (byproduct: water) of the by-products and the water may be 1: 2 to 1:10.
- the molar ratio of sodium carbonate in the by-product mixed with water and the sulfuric acid may be 1: 1 to 1: 1.5.
- the temperature of the mixed solution can be cooled to 101: or less.
- the sodium sulfate hydrate is separated and a mixed solution containing chlorine ions may be recovered.
- the obtained product may include anhydrous sodium sulfate in powder form.
- the by-products may be produced by the input of the coarse tank 0) 3 ) to remove the present in the sintered flue gas. 2020/013399 1 »(: 1 ⁇ 1 ⁇ 2018/015327
- FIG. 1 is a view showing a sintered flue gas desulfurization by-product treatment method according to an embodiment of the present invention.
- Figure 2 is a graph showing the XI 'analysis of the obtained product according to an embodiment of the present invention.
- FIG. 3 is a photograph showing the obtained product according to an embodiment of the present invention.
- first, second, and third are used to describe various parts, components, regions, layers, and / or sections, but are not limited to these. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the invention.
- % means weight%
- the method for treating sintered flue gas desulfurization by-products includes mixing by-products including sodium carbonate and sodium sulfate with water, preparing a mixed solution by mixing by-products mixed with water with sulfuric acid, and the temperature of the mixed solution. Controlling the precipitate to precipitate sodium sulfate hydrate, separating the precipitated sodium sulfate hydrate from the mixed solution, and concentrating and drying the sodium sulfate hydrate to recover the obtained product including sodium sulfate.
- the method may further include filtering impurities from the byproduct mixed with water.
- the step of preparing a mixed solution by mixing the by-product with sulfuric acid may further comprise the step of collecting the carbon dioxide generated by the reaction of the by-product and sulfuric acid.
- water is mixed with by-products including sodium carbonate and sodium sulfate.
- by-products may be by-products from the sinter flue gas desulfurization process. Specifically, the by-product can be produced through the following reaction.
- a heavy tank (: 0 3 ) may be added to remove ⁇ in the sinter flue gas.
- Neutral heating is carried out by sintered flue gas at a temperature of about 140 to 1501: 2020/013399 1 »(: 1 ⁇ 1 ⁇ 2018/015327
- By-products generated in the sintered flue gas desulfurization process generated through the above reactions may specifically include 10 to 40 wt% sodium carbonate, 50 to 85 wt% sodium sulfate, and 1 to 10 wt% sodium chloride based on the total by-product weight. .
- sodium bicarbonate does not react entirely according to the input amount, unreacted sodium carbonate may be present. Accordingly, sodium carbonate is present in the by-product, and chlorine in the exhaust gas may be mixed as impurities, and thus sodium chloride may be included in the by-product.
- the weight ratio of the by-product and water may be 1: 2 to 1:10. If the amount of water is too small, a large amount of precipitate in the form of a slurry may be difficult to prepare an ionization solution. On the other hand, if the amount of water is too large, it is easy to prepare an ionization solution, but the amount of water is excessive, which may be disadvantageous in the future economic aspects.
- impurities may be filtered and purified from the byproduct mixed with water.
- the by-product mixed with water is mixed with sulfuric acid.
- the molar ratio of sodium carbonate and sulfuric acid in the by-product mixed with water may be 1: 1 to 1: 1.5. This allows the carbonate ⁇ 0 3_ ) in the by-product mixed with water to be reacted with sulfuric acid and converted into carbon dioxide.
- the carbon dioxide generated in this way can be collected and used in a separate process. Meanwhile, sulfate ions, sodium ions, and chlorine ions may be present in the mixed solution after carbon dioxide is collected.
- the sodium sulfate hydrate of the crystal form was precipitated by controlling the temperature of the mixed solution. Specifically, 2020/013399 1 »(: 1 ⁇ 1 ⁇ 2018/015327
- the temperature of the mixed solution can be cooled to 10 or less.
- sodium sulfate hydrate may be precipitated in a crystalline form, and separation of the mixed solution and sodium sulfate hydrate in which ionized chlorine ions are present may be facilitated.
- chlorine ions may be present in the mixed solution remaining after sodium sulfate hydrate is separated. It may be in the form of ⁇ 1, and may be used in a separate process by recovering a mixed solution in which chlorine ions are present.
- sodium sulfate hydrate separated from the mixed solution is concentrated and dried. As a result, as shown in FIG. 3, a product containing sodium sulfate may be obtained.
- By-products from the sinter flue gas desulfurization process were mixed with water.
- By-products included sodium carbonate, sodium sulfate and sodium chloride, and the by-products consisted of 25 wt% sodium carbonate, 70 wt% sodium sulfate and 5 wt% sodium chloride and other impurities relative to the total by-product weight.
- Sodium carbonate, sodium sulphate and sodium chloride in the by-products are highly soluble in water and are ionized by mixing with water. At this time, the weight ratio of the by-product and water was mixed to be 1: 6.
- the byproduct mixed with water was mixed with sulfuric acid to prepare a mixed solution.
- Sodium carbonate and sulfuric acid in the byproduct mixed with water was mixed so that the molar ratio of 1: 1.3.
- Carbon dioxide produced by the reaction of sulfuric acid with by-product mixed with water was collected for separate use.
- Carbon dioxide is produced by the reaction of carbonate ((: 0 3_ ) with sulfuric acid in the byproduct mixed with water. 2020/013399 1 »(: 1 ⁇ 1 ⁇ 2018/015327
- the mixed solution was cooled to a temperature of 10 ° C. or less.
- Sodium sulfate hydrate was precipitated in crystalline form, and solid-liquid separation was performed to separate sodium sulfate hydrate in crystalline form from the mixed solution.
- the sodium sulfate hydrate separated from the mixed solution was concentrated and dried to recover a product containing anhydrous sodium sulfate powder.
- the form of carbonate ions in the obtained product was not observed. This is due to the conversion of carbonate ions into carbon dioxide by the reaction of by-products and sulfuric acid.
Abstract
Introduced is a method for treating a sintering flue gas desulfurization by-product, the method comprising: a step of mixing a by-product comprising sodium carbonate and sodium sulfate with water; a step of preparing a mixed solution by mixing, with sulfuric acid, the by-product mixed with water; a step of adjusting the temperature of the mixed solution to precipitate sodium sulfate hydrate; a step of separating the precipitated sodium sulfate hydrate from the mixed solution; and a step of concentrating and drying the sodium sulfate hydrate to recover an obtained product including sodium sulfate.
Description
2020/013399 1»（：1^1{2018/015327 2020/013399 1 »（： 1 ^ 1 {2018/015327
【명세세 [Specifications
【발명의 명칭】 [Name of invention]
소결 배가스 탈황부산물 처리방법 Sintered flue gas desulfurization by-product treatment method
【기술분야】 Technical Field
본 발명은 소결 배가스 탈황 부산물 처리방법에 관한 것이다. 보다 구체적으로, 일반 폐기물로 분류된 소결 배가스 탈황 부산물을 재활용 하거나 용도 전환을 통해 매립 비용을 절감할 수 있는 소결 배가스 탈황 부산물 처리방법에 관한 것이다. The present invention relates to a method for treating sintered flue gas desulfurization by-products. More specifically, the present invention relates to a method for treating sintered flue gas desulfurization by-products which can reduce landfill costs by recycling or reusing sintered flue gas desulfurization by-products classified as general waste.
【발명의 배경이 되는 기술】 [Technique to become background of invention]
제철소 소결공정 중 배가스 라인에서 발생하는 30）（를 제거하기 위해 탈황제로 중조（犯狀03）를 사용하며， 탈황 처리 후， 발생하는 더스트는 전량 일반폐기물로분류되어 매립 처리를 하게 된다. During the sintering process of steelworks, heavy tank (犯 狀 0 3 ) is used as a desulfurization agent to remove 30） (generated from the flue gas line). After desulfurization, all the dust generated is classified as general waste and landfilled.
이로 인한 탈황 더스트 발생 예상량은 매년 약 7만톤에 육박하며， 매립지 부족으로 인한 지속적인 매립 비용의 상승으로 원가 부담이 많은 실정이다. 따라서 건식 혹은 습식법을 통한 재생기술 개발을 통해 소다회 혹은 중조로 다시 전환할 수 있다면 소결 공정에 재활용 하거나 제강 공정에 활용이 가능하므로 매립비용 절감은 물론 신규 이윤창출을 통한 원가경쟁력을 향상시킬 수 있다. The estimated amount of desulfurized dust generated is about 70,000 tons per year, and the cost burden is high due to the continuous increase in landfill costs due to lack of landfill. Therefore, if it is possible to switch back to soda ash or mid-bath through the development of regeneration technology through dry or wet method, it can be recycled in sintering process or used in steel making process, which can reduce landfill cost and improve cost competitiveness through new profit creation.
일반적으로 대부분 솔베이법을 활용한 습식 처리를 통해 소다회 및 중조를 재생하고 있으나, 본 발명에서는 건식 및 습식 처리 병행하여 고온에서 용융시킨 후, 수용액에 용출시켜 농축， 탄산화 및 건조 등의 공정을통해서 폐기물의 용도 전환을하고자 한다. Generally, soda ash and sodium bicarbonate are regenerated by wet treatment using the Solvay method. However, in the present invention, the molten ash is melted at high temperature in parallel with the dry and wet treatment, and then eluted in an aqueous solution. I want to switch the use of.
【발명의 내용】 [Content of invention]
【해결하고자하는 과제】 【Problem to solve】
본 발명에서는 일반 폐기물로 분류된 소결 배가스 탈황 부산물을 재활용 하거나 용도 전환을 통해 매립 비용을 절감할 수 있는 소결 배가스 탈황부산물 처리방법을 제공한다. The present invention provides a method for treating sintered flue gas desulfurization by-products which can reduce landfill costs by recycling sintered flue gas desulfurization by-products classified as general wastes or converting their use.
【과제의 해결 수단】 [Measures of problem]
본 발명의 일 실시예에 의한 소결 배가스 탈황 부산물 처리방법은 탄산나트륨 및 황산나트륨을 포함하는 부산물을 물과 혼합하는 단계; 상기
2020/013399 1»（：1^1{2018/015327 Sintered flue gas desulfurization by-product treatment method according to an embodiment of the present invention comprises the steps of mixing the by-products including sodium carbonate and sodium sulfate with water; remind 2020/013399 1 »（： 1 ^ 1 {2018/015327
물과 혼합된 부산물을 황산과 혼합하여 혼합용액을 제조하는 단계; 상기 혼합용액의 온도를 조절하여 황산나트륨 수화물을 석출시키는 단계; 상기 혼합용액으로부터 상기 석출된 황산나트륨수화물을분리하는단계; 및 상기 황산나트륨 수화물을 농죽하고 건조하여 황산나트륨을 포함하는 수득물을 회수하는 단계;를포함한다. Preparing a mixed solution by mixing the byproduct mixed with water with sulfuric acid; Adjusting the temperature of the mixed solution to precipitate sodium sulfate hydrate; Separating the precipitated sodium sulfate hydrate from the mixed solution; And concentrating and drying the sodium sulfate hydrate to recover a product containing sodium sulfate.
상기 부산물을 물과 혼합하는 단계 이후， 상기 물과 혼합된 부산물로부터 불순물을 여과하는 단계;를 더 포함할수 있다. After mixing the by-products with water, filtering impurities from the by-products mixed with the water; may further include.
상기 부산물을 황산과혼합하여 혼합용액을 제조하는단계 이후， 상기 부산물과 상기 황산의 반응에 의해 발생된 이산화탄소를 포집하는 단계;를 더 포함할수 있다. After mixing the by-products with sulfuric acid to prepare a mixed solution, collecting the carbon dioxide generated by the reaction of the by-products and the sulfuric acid; may further include.
상기 이산화탄소를 포집하는 단계에서， 상기 이산화탄소는 상기 물과 혼합된 부산물 중 탄산이온（¥3 이 황산과 반응하여 발생되는 것일 수 있다. In the step of capturing the carbon dioxide, the carbon dioxide may be generated by the reaction of carbonate ion (¥ 3 is with sulfuric acid in the by-product mixed with the water.
상기 부산물을 물과 혼합하는 단계에서， 상기 부산물은， 10 내지 40 중량%의 탄산나트륨， 50 내지 85 중량%의 황산나트륨 및 1 내지 10 중량%의 염화나트륨을 포함할수 있다. In the step of mixing the by-products with water, the by-products may include 10 to 40% by weight sodium carbonate, 50 to 85% by weight sodium sulfate and 1 to 10% by weight sodium chloride.
상기 부산물을 물과 혼합하는 단계에서， 상기 부산물과， 상기 물의 중량비（부산물: 물）는 1 : 2내지 1 : 10일 수 있다. In the step of mixing the by-products with water, the weight ratio (byproduct: water) of the by-products and the water may be 1: 2 to 1:10.
상기 혼합용액을 제조하는 단계에서， 상기 물과 혼합된 부산물 중 탄산나트륨과， 상기 황산의 몰비（물과혼합된 부산물 중 탄산나트륨:황산）는 1 : 1 내지 1 : 1.5일 수 있다. In the step of preparing the mixed solution, the molar ratio of sodium carbonate in the by-product mixed with water and the sulfuric acid (sodium carbonate in the by-product mixed with water: sulfuric acid) may be 1: 1 to 1: 1.5.
상기 황산나트륨 수화물을 석출시키는 단계에서, 상기 혼합용액의 온도를 101： 이하로 냉각할수 있다. In the step of depositing the sodium sulfate hydrate, the temperature of the mixed solution can be cooled to 101: or less.
상기 석줄된 황산나트륨 수화물을 분리하는 단계에서， 상기 황산나트륨 수화물이 분리되고 염소 이온이 포함된 혼합용액을 회수할 수 있다. In the step of separating the sulphated sodium sulfate hydrate, the sodium sulfate hydrate is separated and a mixed solution containing chlorine ions may be recovered.
상기 수득물을 회수하는 단계에서, 상기 수득물은 분말 형태의 무수 황산나트륨을포함할수 있다. In the step of recovering the obtained product, the obtained product may include anhydrous sodium sulfate in powder form.
상기 혼합물을 제조하는 단계에서, 상기 부산물은 소결 배가스 중에 존재하는 의 제거를 위해 중조어대0）3）를투입하여 생성된 것일 수 있다.
2020/013399 1»（：1^1{2018/015327 In the step of preparing the mixture, the by-products may be produced by the input of the coarse tank 0) 3 ) to remove the present in the sintered flue gas. 2020/013399 1 »（： 1 ^ 1 {2018/015327
【발명의 효과】 【Effects of the Invention】
본 발명의 일 실시예에 의한 소결 배가스 탈황 부산물 처리방법에 따르면 전량 매립 폐기되는 소결 배가스 탈황부산물의 매립비 절감은 물론， 폐기물을 유가 자원으로 변환하여 활용함으로써 이윤 창출 및 기업 이미지 제고 효과를 기대할수 있다. According to the method for treating sintered flue gas desulfurization by-products according to an embodiment of the present invention, as well as reducing the landfill cost of sintered flue gas desulfurization by-products that are entirely landfilled, by converting waste into oil resources, profits can be generated and corporate image enhancement effects can be expected. have.
【도면의 간단한설명】 【Brief Description of Drawings】
도 1은 본 발명의 일 실시예에 의한 소결 배가스 탈황 부산물 처리방법을 나타낸 도면이다. 1 is a view showing a sintered flue gas desulfurization by-product treatment method according to an embodiment of the present invention.
도 2는본 발명의 일 실시예에 의한수득물의 XI犯분석 결과를 나타낸 그래프이다. Figure 2 is a graph showing the XI 'analysis of the obtained product according to an embodiment of the present invention.
도 3은본 발명의 일 실시예에 의한수득물을 나타낸사진이다. 3 is a photograph showing the obtained product according to an embodiment of the present invention.
【발명을실시하기 위한구체적인 내용】 [Specific contents for carrying out invention]
제 1 , 제 2및 저ᅵ 3등의 용어들은 다양한부분， 성분， 영역， 층 및/또는 섹션들을 설명하기 위해 사용되나 이들에 한정되지 않는다. 이들 용어들은 어느 부분， 성분, 영역， 층 또는 섹션을 다른 부분， 성분， 영역， 층 또는 섹션과 구별하기 위해서만 사용된다. 따라서, 이하에서 서술하는 제 1 부분, 성분, 영역, 층 또는 섹션은 본 발명의 범위를 벗어나지 않는 범위 내에서 제 2부분， 성분, 영역, 층또는 섹션으로 언급될 수 있다. Terms such as first, second, and third are used to describe various parts, components, regions, layers, and / or sections, but are not limited to these. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the invention.
여기서 사용되는 전문 용어는 단지 특정 실시예를 언급하기 위한 것이며, 본 발명을 한정하는 것을 의도하지 않는다. 여기서 사용되는 단수 형태들은 문구들이 이와 명백히 반대의 의미를 나타내지 않는 한 복수 형태들도포함한다. 명세서에서 사용되는 "포함하는” 의 의미는특정 특성, 영역, 정수, 단계， 동작， 요소 및/또는성분을구체화하며， 다른특성， 영역， 정수， 단계, 동작, 요소 및/또는 성분의 존재나 부가를 제외시키는 것은 아니다. The terminology used herein is for reference only to specific embodiments and is not intended to limit the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the context clearly indicates the opposite. As used herein, the meaning of "comprising" embodies a particular characteristic, region, integer, step, operation, element and / or component, and the presence of another characteristic, region, integer, step, operation, element and / or component or It does not exclude the addition.
어느 부분이 다른 부분의 "위에" 또는 ”상에” 있다고 언급하는 경우， 이는 바로 다른 부분의 위에 또는 상에 있을 수 있거나 그 사이에 다른 부분이 수반될 수 있다. 대조적으로 어느 부분이 다른 부분의 ”바로 위에" 있다고 언급하는 경우， 그사이에 다른부분이 개재되지 않는다. When a part is referred to as being "on" or "on" another part, it may be directly on or on the other part or may be accompanied by another part in between. In contrast, when a part is mentioned "right over" another part, no other part is intervened.
다르게 정의하지는 않았지만， 여기에 사용되는 기술용어 및
2020/013399 1»（：1^1{2018/015327 Although not defined otherwise, the technical terms used herein and 2020/013399 1 »（： 1 ^ 1 {2018/015327
과학용어를 포함하는 모든 용어들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 일반적으로 이해하는 의미와 동일한 의미를 가진다. 보통 사용되는 사전에 정의된 용어들은 관련기술문헌과 현재 개시된 내용에 부합하는 의미를 가지는 것으로 추가 해석되고, 정의되지 않는 한 이상적이거나 매우공식적인 의미로해석되지 않는다. All terms including scientific terms have the same meaning as commonly understood by one of ordinary skill in the art. Commonly defined terms used are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.
또한， 특별히 언급하지 않는 한 %는중량%를 의미하며，
In addition, unless otherwise indicated,% means weight%,
0.00()1중량%이다. 0.00 () 1% by weight.
이하， 본 발명의 실시예에 대하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는실시예에 한정되지 않는다. Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
소결 배가스탈황부산물처리방법 Sintered flue gas desulfurization by-product treatment method
본 발명의 일 실시예에 의한 소결 배가스 탈황 부산물 처리방법은 탄산나트륨 및 황산나트륨을 포함하는 부산물을 물과 혼합하는 단계， 물과 혼합된 부산물을 황산과 혼합하여 혼합용액을 제조하는 단계， 혼합용액의 온도를 조절하여 황산나트륨 수화물을 석출시키는 단계， 혼합용액으로부터 석줄된 황산나트륨 수화물을 분리하는 단계 및 황산나트륨 수화물을 농축하고 건조하여 황산나트륨을 포함하는 수득물을 회수하는 단계를 포함한다. The method for treating sintered flue gas desulfurization by-products according to an embodiment of the present invention includes mixing by-products including sodium carbonate and sodium sulfate with water, preparing a mixed solution by mixing by-products mixed with water with sulfuric acid, and the temperature of the mixed solution. Controlling the precipitate to precipitate sodium sulfate hydrate, separating the precipitated sodium sulfate hydrate from the mixed solution, and concentrating and drying the sodium sulfate hydrate to recover the obtained product including sodium sulfate.
부산물을 물과 혼합하는 단계 이후， 물과 혼합된 부산물로부터 불순물을 여과하는 단계를 더 포함할수 있다. After mixing the byproduct with water, the method may further include filtering impurities from the byproduct mixed with water.
또한, 부산물을 황산과 혼합하여 혼합용액을 제조하는 단계 이후, 부산물과 황산의 반응에 의해 발생된 이산화탄소를 포집하는 단계를 더 포함할수 있다. In addition, after the step of preparing a mixed solution by mixing the by-product with sulfuric acid, it may further comprise the step of collecting the carbon dioxide generated by the reaction of the by-product and sulfuric acid.
먼저， 부산물을 물과 혼합하는 단계에서는 탄산나트륨 및 황산나트륨을포함하는부산물에 물을혼합한다. 부산물은소결 배가스 탈황 공정에서 발생한 부산물일 수 있다. 구체적으로， 부산물은 하기의 반응을 거쳐 생성돨수 있다. First, in the step of mixing the by-products with water, water is mixed with by-products including sodium carbonate and sodium sulfate. By-products may be by-products from the sinter flue gas desulfurization process. Specifically, the by-product can be produced through the following reaction.
소결 배가스 중에 존재하는 次의 제거를 위해 중조어태(：03)를 투입할 수 있다. 약 140 내지 1501：의 온도인 소결 배가스에 의해 중조가 열
2020/013399 1»（：1^1{2018/015327 A heavy tank (： 0 3 ) may be added to remove 次 in the sinter flue gas. Neutral heating is carried out by sintered flue gas at a temperature of about 140 to 1501: 2020/013399 1 »（： 1 ^ 1 {2018/015327
분해되어 하기의 반응식과 같이 중조가탄산나트륨과물로 변환될 수 있다. It may be decomposed and converted into sodium bicarbonate sodium bicarbonate as shown in the following scheme.
[반응식 1] 2犯狀03 犯2¥3 + ¾0 [Scheme 1] 2 犯 狀 0 3犯2 ¥ 3 + ¾0
상기와 같은 반응으로 열 분해에 의해
흡착 성능이 향상된 다공성의 탄산나트륨이 발생되고， 하기의 반응식과 같이，
반응으로 황산나트륨으로 변환될 수 있다. By thermal decomposition in the same reaction as above Porous sodium carbonate with improved adsorption performance is generated, as shown in the following reaction formula, The reaction can be converted to sodium sulfate.
[반응식 2] 加20¾ +쌨2 + 1/202 ®犯2304 + ¥2 [Scheme 2] 加2 0¾ + 쌨 2 + 1/20 2 ® 犯2 30 4 + ¥ 2
상기의 반응들을 거쳐 생성된 소결 배가스 탈황 공정에서 발생한 부산물은 구체적으로， 전체 부산물 중량에 대하여 10 내지 40 중량%의 탄산나트륨, 50 내지 85 중량%의 황산나트륨 및 1 내지 10 중량%의 염화나트륨을포함할수 있다. By-products generated in the sintered flue gas desulfurization process generated through the above reactions may specifically include 10 to 40 wt% sodium carbonate, 50 to 85 wt% sodium sulfate, and 1 to 10 wt% sodium chloride based on the total by-product weight. .
그러나 중조가 투입량에 따라 전량 반응하지 않을 경우， 미반응된 탄산나트륨이 존재할 수 있다. 이에 따라 부산물 중에 탄산나트륨이 존재하며， 배가스중 염소성분이 불순물로혼입될 수 있으므로부산물 중에 염화나트륨이 포함될 수 있다. However, if the sodium bicarbonate does not react entirely according to the input amount, unreacted sodium carbonate may be present. Accordingly, sodium carbonate is present in the by-product, and chlorine in the exhaust gas may be mixed as impurities, and thus sodium chloride may be included in the by-product.
이와 같은 부산물에 물을 투입하여 혼합한다. 이때, 부산물과， 물의 중량비는 1 : 2 내지 1 : 10일 수 있다. 물의 양이 너무 적을 경우， 슬러리 형태로 침전물이 많이 생겨 이온화 용액을 제조하기 어려울 수 있다. 반면, 물의 양이 너무 많을 경우， 이온화 용액을 제조하기는 수월하나 물의 양이 과도하여 향후 경제적인 면에서 불리할수 있다. Water is added to these byproducts and mixed. In this case, the weight ratio of the by-product and water may be 1: 2 to 1:10. If the amount of water is too small, a large amount of precipitate in the form of a slurry may be difficult to prepare an ionization solution. On the other hand, if the amount of water is too large, it is easy to prepare an ionization solution, but the amount of water is excessive, which may be disadvantageous in the future economic aspects.
다음으로, 물과 혼합된 부산물로부터 불순물을 여과하여 정제하는 과정을거칠 수 있다. Next, impurities may be filtered and purified from the byproduct mixed with water.
다음으로， 혼합용액을 제조하는 단계에서는 물과 혼합된 부산물을 황산과혼합한다.이때,물과혼합된 부산물 중 탄산나트륨과，황산의 몰비는 1 : 1 내지 1 : 1.5일 수 있다. 이를 통해 물과 혼합된 부산물 중 탄산이온ᄄ03_）이 황산과 반응하여 이산화탄소 형태로 변환될 수 있다. Next, in the step of preparing a mixed solution, the by-product mixed with water is mixed with sulfuric acid. At this time, the molar ratio of sodium carbonate and sulfuric acid in the by-product mixed with water may be 1: 1 to 1: 1.5. This allows the carbonate ᄄ 0 3_ ) in the by-product mixed with water to be reacted with sulfuric acid and converted into carbon dioxide.
이렇게 발생된 이산화탄소를 포집하여 별도의 공정에 사용할 수 있다. 한편, 이산화탄소가 포집되고 남은 혼합용액에는 황산이온， 나트륨이온 및 염소 이온이 존재할수 있다. The carbon dioxide generated in this way can be collected and used in a separate process. Meanwhile, sulfate ions, sodium ions, and chlorine ions may be present in the mixed solution after carbon dioxide is collected.
다음으로 , 황산나트륨 수화물을 석출시키는 단계에서는 혼합용액의 온도를조절하여 결정 형태의 황산나트륨수화물을석출시켰다. 구체적으로，
2020/013399 1»（：1^1{2018/015327 Next, in the step of depositing the sodium sulfate hydrate, the sodium sulfate hydrate of the crystal form was precipitated by controlling the temperature of the mixed solution. Specifically, 2020/013399 1 »（： 1 ^ 1 {2018/015327
혼합용액의 온도는 10 의 온도 이하로 냉각할 수 있다. The temperature of the mixed solution can be cooled to 10 or less.
이와 같이 온도를 조절하면 황산나트륨 수화물이 결정 형태를 갖고 석출되며, 이온화되어 있는 염소 이온이 존재하는 혼합용액과 황산나트륨 수화물의 분리가 용이하게 될 수 있다. As such, by adjusting the temperature, sodium sulfate hydrate may be precipitated in a crystalline form, and separation of the mixed solution and sodium sulfate hydrate in which ionized chlorine ions are present may be facilitated.
한편， 황산나트륨 수화물이 분리되고 남은 혼합용액에는 염소 이온이 존재할 수 있다. 敗1 형태일 수 있으며， 염소 이온이 존재하는 혼합용액을 회수하여 별도의 공정에 사용할 수 있다. Meanwhile, chlorine ions may be present in the mixed solution remaining after sodium sulfate hydrate is separated. It may be in the form of 敗 1, and may be used in a separate process by recovering a mixed solution in which chlorine ions are present.
다음으로， 수득물을 회수하는 단계에서는 혼합용액으로부터 분리한 황산나트륨 수화물을 농축하고 건조한다. 이를 통해 도 3과 같이， 황산나트륨을 포함하는 수득물이 얻어질 수 있다. Next, in the step of recovering the obtained product, sodium sulfate hydrate separated from the mixed solution is concentrated and dried. As a result, as shown in FIG. 3, a product containing sodium sulfate may be obtained.
이와 같은 방법으로 기존에 전량 폐기되던 소결 배가스 탈황 부산물을 유가 자원인 황산나트륨으로 재생시켜 매립비용의 절감을 기대할 수 있다. 뿐만 아니라 재생을 통한 판매 및 활용을 통한 새로운 이윤을 창출 함으로써 제철소 원가 경쟁력을 향상 시킬 수 있다. In this way, the reduction of landfill costs can be expected by regenerating the sintered flue gas desulfurization by-product, which has been entirely discarded, into sodium sulfate, a valuable resource. In addition, steelmakers' cost competitiveness can be improved by generating new profits through sales and utilization through recycling.
이하 본 발명의 구체적인 실시예를 기재한다. 그러나 하기 실시예는 본 발명의 구체적인 일 실시예일뿐 본 발명이 하기 실시예에 한정되는 것은 아니다. Hereinafter, specific examples of the present invention will be described. However, the following examples are only specific examples of the present invention, and the present invention is not limited to the following examples.
실시예 Example
소결 배가스 탈황 공정에서 발생한 부산물을 물과 혼합하였다. 부산물에는 탄산나트륨， 황산나트륨 및 염화나트륨이 포함되었으며， 부산물은 전체 부산물 중량에 대하여, 25 중량%의 탄산나트륨， 70 중량%의 황산나트륨 및 5 중량의 염화나트륨 및 기타 불순물로 이루어져 있었다. 부산물 중의 탄산나트륨， 황산나트륨 및 염화나트륨은 물에 대한 용해도가 높아 물과의 혼합으로 이온화 상태로 만들었다. 이때， 부산물과, 물의 중량비는 1 : 6이 되도록 혼합하였다. By-products from the sinter flue gas desulfurization process were mixed with water. By-products included sodium carbonate, sodium sulfate and sodium chloride, and the by-products consisted of 25 wt% sodium carbonate, 70 wt% sodium sulfate and 5 wt% sodium chloride and other impurities relative to the total by-product weight. Sodium carbonate, sodium sulphate and sodium chloride in the by-products are highly soluble in water and are ionized by mixing with water. At this time, the weight ratio of the by-product and water was mixed to be 1: 6.
물과 혼합된 부산물을 황산과 혼합하여 혼합용액을 제조하였다. 물과 혼합된 부산물 중 탄산나트륨과， 황산의 몰비는 1 : 1.3이 되도록 혼합하였다. 물과 혼합된 부산물과 황산의 반응으로 생성된 이산화탄소를 별도의 사용을 위해 포집하였다. 이산화탄소는 물과 혼합된 부산물 중 탄산이온（（：03_）이 황산과 반응하여 발생한 것이다.
2020/013399 1»（：1^1{2018/015327 The byproduct mixed with water was mixed with sulfuric acid to prepare a mixed solution. Sodium carbonate and sulfuric acid in the byproduct mixed with water was mixed so that the molar ratio of 1: 1.3. Carbon dioxide produced by the reaction of sulfuric acid with by-product mixed with water was collected for separate use. Carbon dioxide is produced by the reaction of carbonate (（： 0 3_ ） with sulfuric acid in the byproduct mixed with water. 2020/013399 1 »（： 1 ^ 1 {2018/015327
이와 같이 이산화탄소가 기체 형태로 포집되어 분리됨에 따라 혼합용액에는 황산이온, 나트륨이온 및 염소 이온이 존재하였다. As the carbon dioxide was collected and separated in the gas form, sulfate ions, sodium ions, and chlorine ions were present in the mixed solution.
다음으로 혼합용액을 10°(：의 온도 이하로 냉각하였다. 이를 통해 황산나트륨 수화물이 결정 형태로 석출되었고， 고액 분리를 수행하여 혼합용액으로부터 결정 형태의 황산나트륨수화물을 분리하였다. Next, the mixed solution was cooled to a temperature of 10 ° C. or less. Sodium sulfate hydrate was precipitated in crystalline form, and solid-liquid separation was performed to separate sodium sulfate hydrate in crystalline form from the mixed solution.
결정 형태의 황산나트륨 수화물을 분리되고 남은 염소 이온이 포함된 용액을 별도의 사용을위해 회수하였다. Sodium sulfate hydrate in crystalline form was separated and the solution containing the remaining chlorine ions was recovered for separate use.
이렇게 혼합용액으로부터 분리된 황산나트륨수화물을농축， 건조하여 무수 황산나트륨 분말을 포함하는 수득물을 회수하였다. 수득물에서 탄산 이온의 형태는 관찰할 수 없었다. 이는 부산물과 황산의 반응에 의해 탄산 이온이 이산화탄소 형태로 전환되어 포집되었기 때문이다. The sodium sulfate hydrate separated from the mixed solution was concentrated and dried to recover a product containing anhydrous sodium sulfate powder. The form of carbonate ions in the obtained product was not observed. This is due to the conversion of carbonate ions into carbon dioxide by the reaction of by-products and sulfuric acid.
수득물의 _ 분석 결과는 도 2에서 확인할 수 있으며， 분말 형태의 수득물모습은 하기 표 1 및 도 3에서 확인할수 있다. 【표 1] _ Analysis of the obtained product can be confirmed in Figure 2, the appearance of the powder in the form can be seen in Table 1 and Figure 3 below. [Table 1]
Claims
【청구항 1] [Claim 1]
탄산나트륨 및 황산나트륨을포함하는부산물을·물과혼합하는단계 ; 상기 물과 혼합된 부산물을 황산과 혼합하여 혼합용액을 제조하는 단계; Mixing the by-product comprising sodium carbonate and sodium sulfate, water, and; Preparing a mixed solution by mixing the byproduct mixed with water with sulfuric acid;
상기 혼합용액의 온도를 조절하여 황산나트륨 수화물을 석출시키는 단계; Adjusting the temperature of the mixed solution to precipitate sodium sulfate hydrate;
상기 혼합용액으로부터 상기 석출된 황산나트륨 수화물을 분리하는 단계; 및 Separating the precipitated sodium sulfate hydrate from the mixed solution; And
상기 황산나트륨 수화물을 농죽하고 건조하여 황산나트륨을 포함하는 Thickening and drying the sodium sulfate hydrate to include sodium sulfate
'수득물을회수하는 단계;를포함하는소결 배가스탈황부산물 처리방법. A method of treating sintered flue gas desulfurization by-product comprising the step of recovering the obtained product.
【청구항 2】 [Claim 2]
제 1항에 있어서, The method of claim 1,
상기 부산물을물과혼합하는단계 이후, After the step of mixing the by-products with water,
상기 물과 혼합된 부산물로부터 불순물을 여과하는 단계;를 더 포함하는소결 배가스 탈황부산물 처리방법 . Filtering impurities from the by-products mixed with the water; Sintered flue gas desulfurization by-product processing method further comprising.
【청구항 3】 [Claim 3]
제 1항에 있어서, The method of claim 1,
상기 부산물을 황산과혼합하여 혼합용액을 제조하는단계 이후， 상기 부산물과 상기 황산의 반응에 의해 발생된 이산화탄소를 포집하는 단계 ;를 더 포함하는소결 배가스 탈황부산물 처리방법 . After the step of mixing the by-products with sulfuric acid to prepare a mixed solution, the step of collecting the carbon dioxide generated by the reaction of the by-products and sulfuric acid; further comprising a sintered flue gas desulfurization by-product treatment method.
【청구항 4] [Claim 4]
제 3항에 있어서， The method of claim 3,
상기 이산화탄소를포집하는 단계에서, In the step of collecting the carbon dioxide,
상기 이산화탄소는 상기 물과 혼합된 부산물 중 탄산이온 (¥3_)이 황산과 반응하여 발생되는 것인 소결 배가스 탈황부산물 처리방법 . The carbon dioxide is a sintered flue gas desulfurization by-product treatment method is generated by the reaction of carbonate (¥ 3_ ) with sulfuric acid in the by-product mixed with the water.
【청구항 5] [Claim 5]
제 1항에 있어서， The method of claim 1,
상기 부산물을물과혼합하는 단계에서 , In the step of mixing the by-products with water,
상기 부산물은，
2020/013399 1»（：1^1{2018/015327 The by-product is, 2020/013399 1 »（： 1 ^ 1 {2018/015327
10 내지 40중량%의 탄산나트륨， 50 내지 85중량%의 황산나트륨 및 1 내지 10중량%의 염화나트륨을 포함하는 소결 배가스 탈황 부산물 처리방법 .A process for treating sintered flue gas desulfurization by-products comprising 10 to 40 weight percent sodium carbonate, 50 to 85 weight percent sodium sulfate and 1 to 10 weight percent sodium chloride.
【청구항 6】 [Claim 6]
저 11항에 있어서, According to claim 11,
상기 부산물을 물과 혼합하는 단계에서 , In the step of mixing the by-products with water,
상기 부산물과,상기 물의 중량비（부산물:물）는 1 : 2내지 1 : 10인 소결 배가스 탈황 부산물 처리방법 . The by-product and water weight ratio (byproduct: water) is 1: 2 to 1: 10 sintered flue gas desulfurization by-product method.
【청구항 73 [Claim 73]
제 1항에 있어서, The method of claim 1,
상기 혼합용액을 제조하는 단계에서, In the step of preparing the mixed solution,
상기 물과 혼합된 부산물 중 탄산나트륨과， 상기 황산의 몰비（물과 혼합된 부산물 중 탄산나트륨:황산）는 1 : 1 내지 1 : 1.5인 소결 배가스 탈황 부산물 처리방법. The method for treating sintered flue gas desulfurization by-products wherein sodium carbonate in the by-product mixed with water and the molar ratio of the sulfuric acid (sodium carbonate: sulfuric acid in the by-product mixed with water) are from 1: 1 to 1: 1.5.
【청구항 8] [Claim 8]
제 1항에 있어서， The method of claim 1,
상기 황산나트륨 수화물을 석줄시키는 단계에서, In the step of stabilizing the sodium sulfate hydrate,
상기 혼합용액의 온도를
이하로 냉각하는 소결 배가스 탈황 부산물 처리방법 . The temperature of the mixed solution Process for treatment of sintered flue gas desulfurization by-product cooled to
【청구항 9] [Claim 9]
제 5항에 있어서， The method of claim 5,
상기 석줄된 황산나트륨 수화물을 분리하는 단계에서, In the step of separating the staline sodium sulfate hydrate,
상기 황산나트륨 수화물이 분리되고 염소 이온이 포함된 혼합용액을 회수하는 소결 배가스 탈황 부산물 처리방법 . A method for treating sintered flue gas desulfurization by-products for separating the sodium sulfate hydrate and recovering a mixed solution containing chlorine ions.
【청구항 10】 [Claim 10]
제 1항에 있어서， The method of claim 1,
상기 수득물을 회수하는 단계에서， In the step of recovering the obtained product,
상기 수득물은 분말 형태의 무수 황산나트륨을 포함하는 소결 배가스 탈황 부산물 처리방법. The obtained product is a sintered flue gas desulfurization by-product method comprising anhydrous sodium sulfate in powder form.
【청구항 11】 [Claim 11]
41항에 있어서,
2020/013399 1»（：1^1{2018/015327 The method of claim 41, 2020/013399 1 »（： 1 ^ 1 {2018/015327
상기 혼합물을 제조하는 단계에서， In the step of preparing the mixture,
상기 부산물은 소결 배가스 중에 존재하는 어의 제거를 위해 중조（此敗03）를투입하여 생성된 것인 소결 배가스 탈황부산물 처리방법.
The by-product is a method of treating the sintered flue gas desulfurization by-products produced by introducing a sodium bicarbonate (此 敗 0 3 ) to remove the fish present in the sintered flue gas.
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| JPH11514567A (en) * | 1995-10-31 | 1999-12-14 | ノ バ カ ル ブ | Method for treating flue gas containing sulfur oxides |
| JP3196382B2 (en) * | 1992-12-16 | 2001-08-06 | 東ソー株式会社 | Method for electrolysis of sodium sulfate solution |
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| KR101388179B1 (en) * | 2012-05-03 | 2014-04-22 | 주식회사 유니코정밀화학 | COMPOSITION FOR REMOVING SOx IN EXHAUSTED GAS AND METHOD FOR REMOVING SOx IN EXHAUSTED GAS |
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| KR100715868B1 (en) * | 2005-05-20 | 2007-05-07 | 주식회사 포스코 | A method of removing a SOx in an exhausted gas |
| KR101253980B1 (en) * | 2011-08-25 | 2013-04-11 | 주식회사 포스코 | Recycling method of byproduct |
| KR20160085230A (en) * | 2016-06-21 | 2016-07-15 | 순천대학교 산학협력단 | Method and apparatus of Sodium source separation from desulfurized waste for regeneration of NaHCO3 |
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| JP3196382B2 (en) * | 1992-12-16 | 2001-08-06 | 東ソー株式会社 | Method for electrolysis of sodium sulfate solution |
| JPH11514567A (en) * | 1995-10-31 | 1999-12-14 | ノ バ カ ル ブ | Method for treating flue gas containing sulfur oxides |
| JP2002263442A (en) * | 2001-03-12 | 2002-09-17 | Mitsubishi Heavy Ind Ltd | So3 removing equipment for flue gas |
| KR101099073B1 (en) * | 2008-12-04 | 2011-12-26 | 주식회사 유니코정밀화학 | Composition for removing sox in exhausted gas |
| KR101388179B1 (en) * | 2012-05-03 | 2014-04-22 | 주식회사 유니코정밀화학 | COMPOSITION FOR REMOVING SOx IN EXHAUSTED GAS AND METHOD FOR REMOVING SOx IN EXHAUSTED GAS |
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