CN113083015A - Resource utilization method for flue gas desulfurization slag by semidry process - Google Patents
Resource utilization method for flue gas desulfurization slag by semidry process Download PDFInfo
- Publication number
- CN113083015A CN113083015A CN202110318508.6A CN202110318508A CN113083015A CN 113083015 A CN113083015 A CN 113083015A CN 202110318508 A CN202110318508 A CN 202110318508A CN 113083015 A CN113083015 A CN 113083015A
- Authority
- CN
- China
- Prior art keywords
- slag
- roasting
- flue gas
- sulfur dioxide
- gas desulfurization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 124
- 239000003546 flue gas Substances 0.000 title claims abstract description 103
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 93
- 230000023556 desulfurization Effects 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 87
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 128
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 64
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000292 calcium oxide Substances 0.000 claims abstract description 33
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 27
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 25
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004064 recycling Methods 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 17
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004566 building material Substances 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 238000000746 purification Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 26
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 20
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 20
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 19
- 239000006227 byproduct Substances 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 11
- 239000000920 calcium hydroxide Substances 0.000 claims description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000012265 solid product Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003830 anthracite Substances 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 6
- AWADHHRPTLLUKK-UHFFFAOYSA-N diazanium sulfuric acid sulfate Chemical compound [NH4+].[NH4+].OS(O)(=O)=O.[O-]S([O-])(=O)=O AWADHHRPTLLUKK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 15
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 239000002956 ash Substances 0.000 description 9
- 235000011116 calcium hydroxide Nutrition 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- 229910052925 anhydrite Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 2
- 235000010261 calcium sulphite Nutrition 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- AOSFMYBATFLTAQ-UHFFFAOYSA-N 1-amino-3-(benzimidazol-1-yl)propan-2-ol Chemical compound C1=CC=C2N(CC(O)CN)C=NC2=C1 AOSFMYBATFLTAQ-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
- C01B17/506—Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/745—Preparation from sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/242—Preparation from ammonia and sulfuric acid or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
A resource utilization method of flue gas desulfurization slag by a semidry method comprises the following steps: sending the semi-dry desulphurization slag generated by the semi-dry desulphurization device to a high-temperature roasting device for high-temperature roasting, doping carbon into the roasted desulphurization slag, decomposing sulfite and sulfate in the roasted desulphurization slag into sulfur dioxide and calcium oxide, taking the sulfur dioxide out of the high-temperature roasting device along with roasting smoke, and discharging the calcium oxide out of the high-temperature roasting device; the roasting flue gas containing sulfur dioxide is sent to an ammonia desulphurization device or a sulfuric acid production device for recycling sulfur dioxide after dust removal and purification; the high-temperature roasting flue gas is dedusted and purified to obtain ash, the ash and the roasting slag enter a roasting slag warehouse together, part of the roasting slag is digested and then returns to a semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and part of the roasting slag is used for producing building materials such as cement. The method realizes the reutilization and resource utilization of the semidry flue gas desulfurization slag, solves the problem of treatment of the semidry flue gas desulfurization slag, reduces the consumption of natural resources and the damage to the environment caused by desulfurization, avoids the secondary pollution of the desulfurization slag, and has remarkable environmental benefit, economic benefit and social benefit.
Description
The technical field is as follows:
the invention belongs to the field of environmental protection, and relates to a resource utilization method of semidry flue gas desulfurization slag, which is particularly suitable for semidry flue gas desulfurization processes of a calcium method and can also be used for semidry flue gas desulfurization processes of a sodium method, a magnesium method and the like.
Background
Sulfur dioxide is a substance harmful to the environment and human beings, sulfur-containing flue gas must be desulfurized before being discharged, and wet desulphurization technologies mainly adopting a calcium method, an ammonia method, a sodium method and the like are used at present.
The semi-dry method flue gas desulfurization is to prepare Ca (OH) by adding water into CaO2The suspension liquid is in contact reaction with the flue gas to remove SO in the flue gas2、HCl、HF、SO3The desulfurization rate can exceed 85 percent in the method of waiting for gaseous pollutants. At present, the application is more extensive and mainly has two types: a rotary spray drying process and a flue gas circulating fluidized bed process. The semi-dry desulfurization process has the characteristics of mature technology, reliable system, simple process flow, less water consumption, small occupied area, good flue gas emission effect, wide flue gas adaptability and the like, and becomes one of the main flue gas desulfurization technologies in the industries of thermal power, steel, coking, nonferrous metal, glass and the like. The desulfurization by-product produced by the technique is in dry powder form and mainly comprises CaSO3、CaCO3、CaO、CaSO4And a small amount of incompletely reacted absorbent (Ca (OH)2) And the like. Because of CaSO in the components3Calcium salts such as calcium sulfite and the like are mainly (account for more than 50 percent) and lead to difficult direct resource utilization, at present, the calcium sulfite can only be stacked and buried for disposal, is very easy to cause secondary pollution to the environment and is seriousThe large environmental and safety hidden troubles and the long-term large safety maintenance cost are important factors for restricting the application of the semi-dry method technology. On the other hand, the limestone resource is reduced, the mining limit is more and more strict under the requirement of environmental protection, and the source of limestone raw materials is more and more tense.
201910433638.7A wet desulphurization device and method for resource utilization of semidry desulphurization ash comprises a desulphurization washing mechanism, a desulphurization ash pulping mechanism and an oxidation concentration mechanism, wherein the desulphurization washing mechanism at least comprises a desulphurization tower (1), a desulphurization circulating pump (2), a desulphurization ash slurry spray pump (6) and a gypsum slurry spray pump (9); the desulfurization ash pulping mechanism at least comprises a desulfurization ash pulping tank (3), a desulfurization mortar liquid pump (4) and a desulfurization mortar liquid storage tank (5); the oxidation concentration mechanism at least comprises an oxidation tower (7), an oxidation fan (8) and a gypsum discharge pump (10). The problem of resource utilization of semi-dry desulfurized fly ash is solved by a wet desulphurization process.
201910262582.3 method for recycling desulfurized fly ash from lime semidry process, in order to solve the problems that desulfurized fly ash is difficult to be used comprehensively and stack and easy to generate secondary pollution, the filtrate obtained after the dehydration of gypsum is reused, a desulfurized mortar liquid filtering device is added in the process flow, the density, pH value and the like of each desulfurized slurry are controlled, the desulfurized fly ash is used for completely replacing lime/limestone raw materials, and the circulating spray desulfurization is carried out on a secondary spray layer and a primary spray layer in a desulfurizing tower, so as to achieve the purpose of removing sulfur dioxide in flue gas; the method reduces the consumption of lime/limestone resources and the generation amount of flue gas desulfurization byproducts.
Although the prior art has disclosed dry cement kiln ammonia process semidry process desulphurization unit, the sulphur thing in the tail gas carries out abundant absorbent device during concretely relates to cement manufacture to solve some unstable ammonium sulfate and ammonium bisulfite liquid and volatilize and exhaust to the air together with the tail gas in prior art, cause the air pollution problem.
In conclusion, the problem of semi-dry desulphurization in a power plant still cannot be solved, so that a method for recycling the semi-dry flue gas desulphurization slag is urgently needed, and the semi-dry desulphurization slag is recycled.
Disclosure of Invention
The invention aims to provide a resource utilization method of semi-dry flue gas desulfurization slag, which utilizes synergistic co-production technologies of desulfurizer regeneration, sulfur dioxide acid preparation, cement manufacture and the like of the semi-dry flue gas desulfurization slag to roast the semi-dry flue gas desulfurization slag at high temperature, and sulfite and sulfate in the desulfurization slag are decomposed into SO2And CaO. Containing a certain concentration of SO2Flue gas used for preparing sulfuric acid and pure SO2、SO3And the like, and can also be used as a byproduct of ammonium sulfate products in an ammonia desulphurization device and a sulfuric acid ammonium sulfate preparation device. One part of the roasting slag mainly containing the regenerated calcium oxide is used as a desulfurizer to return to the semi-dry flue gas desulfurization for recycling, and the other part of the roasting slag can be used as a building material raw material for producing cement and the like. The method realizes the reutilization and resource utilization of the semidry flue gas desulfurization slag, solves the problem of treatment of the semidry flue gas desulfurization slag, and has obvious environmental protection and economic benefits.
The technical scheme of the invention is as follows: a resource utilization method of semidry desulphurization slag comprises the following steps: and (2) delivering the semi-dry desulphurization slag generated by the semi-dry desulphurization device to a high-temperature roasting device for high-temperature roasting, decomposing sulfite and sulfate in the desulphurization slag into sulfur dioxide (a small amount of sulfur trioxide) and calcium oxide after roasting, taking the sulfur dioxide out of the high-temperature roasting device along with roasting smoke, and leaving the calcium oxide in the roasting slag to be discharged out of the high-temperature roasting device.
The roasting fuel can be coal, coke, coal gas and the like, and can also be other energy sources such as electricity and the like, carbon is doped into the roasted desulphurization slag according to the sulfate content in the desulphurization slag, and the desulphurization slag mainly reacts as follows in the roasting process:
CaSO3→CaO+SO2
2CaSO4+C→2CaO+2SO2+CO2
CaSO4+CO→CaO+2SO2+CO2
CaSO4→CaO+SO3
the roasting flue gas containing sulfur dioxide (a small amount of sulfur trioxide) is sent to an ammonia desulphurization device or a sulfuric acid production device for recycling the sulfur dioxide after dust removal and purification.
The ash slag obtained by dedusting and purifying the roasting flue gas and the roasting slag enter a roasting slag warehouse, part of the roasting slag is digested and then returns to a semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and part of the roasting slag is used for producing building materials such as cement.
The digestion reaction is as follows:
CaO+H2O→Ca(OH)2
the semi-dry desulfurization reaction is as follows:
SO2+Ca(OH)2→CaSO3+H2O
SO3+Ca(OH)2→CaSO4+H2O
the high-temperature roasting temperature is 500-1200 ℃, and the roasting temperature is increased along with the increase of the sulfate content in the desulfurized slag.
The total decomposition conversion rate of sulfite and sulfate calcined at high temperature is more than 90%.
The high-temperature roasting furnace can be selected from a horizontal rotary kiln, a vertical roasting furnace, a fluidized bed roasting furnace and the like, and is optimized according to conditions such as processing capacity, energy fuel variety, sulfur dioxide concentration, operation mode and the like so as to ensure roasting effect and quality of roasting smoke. Horizontal rotary kilns for roasting cement clinker, vertical kilns for limestone calcination, vertical coke ovens, fluidized bed furnaces for sulfide calcination, and the like can be used.
For subsequent sulfur dioxide recycling, the sulfur dioxide content of the roasting flue gas is controlled to be 3-13% (volume ratio), and the roasting air quantity needs to be controlled.
The roasting flue gas containing sulfur dioxide enters an ammonia desulphurization device to remove sulfur dioxide by ammonia, and a byproduct ammonium sulfate product is obtained. In an ammonia desulphurization device, sulfur dioxide in roasted flue gas washed by ammonia-containing absorption liquid reacts with ammonia to generate ammonium sulfite, the ammonium sulfite is forcibly oxidized into ammonium sulfate by air, and the ammonium sulfate solution is concentrated, crystallized, separated, dried, packaged and the like to prepare an ammonium sulfate product.
The roasting flue gas containing sulfur dioxide enters a sulfuric acid production device, and by-products of sulfuric acid, pure sulfur dioxide, pure sulfur trioxide and the like are produced. When the concentration of sulfur dioxide is more than 9%, the dry-process sulfuric acid process is preferentially used, and when the concentration of sulfur dioxide is low, the wet-process sulfuric acid process (WSA) can be used. In the sulfuric acid production device, a part of flue gas can be used for preparing products such as pure sulfur dioxide or pure sulfur trioxide.
In order to facilitate storage and sale, for places with small sulfuric acid sales volume and large service radius, the sulfuric acid production device is matched with the sulfuric acid ammonium sulfate preparation device at the same time, and the by-product sulfuric acid reacts with ammonia to prepare an ammonium sulfate solid product, so that the ammonium sulfate solid product can be stored for a long time in a large amount and can be transported for a long distance.
More than 3 percent of high-temperature roasting slag is taken as raw materials of calcium oxide and calcium sulfate for producing building materials such as cement and the like, and the raw materials are supplied to a cement production device and the like to produce building material products such as cement and the like. Therefore, the quality of the desulphurization slag recycled is ensured, and the flue gas desulphurization performance of the semidry process is not influenced. The rest of the roasting slag enters a lime slaking device and is slaked by adding water, then the calcium oxide is converted into calcium hydroxide which returns to the semidry flue gas desulfurization device to be used as a desulfurizer.
Has the advantages that: the method of the invention is used for treating SO with a certain concentration2Flue gas used for preparing sulfuric acid and pure SO2、SO3And the like, and can also be used for producing a byproduct ammonium sulfate product by using an ammonia desulphurization device (with better effect) and an ammonium sulfate preparation device by using sulfuric acid. One part of the roasting slag mainly containing the regenerated calcium oxide is used as a desulfurizer to return to the semi-dry flue gas desulfurization for recycling, and the other part of the roasting slag can be used as a building material raw material for producing cement and the like. The method realizes the reutilization and resource utilization of the semidry flue gas desulfurization slag, solves the problem of treatment of the semidry flue gas desulfurization slag, and has obvious environmental protection and economic benefits. The method realizes the reutilization and resource utilization of the semidry flue gas desulfurization slag, solves the problem of treatment of the semidry flue gas desulfurization slag, reduces the consumption of natural resources and the damage to the environment by desulfurization, avoids the secondary pollution of the desulfurization slag, and has remarkable environmental benefit, economic benefit and social benefit. The method is especially suitable for the calcium method semi-dry method flue gas desulfurization process, and can also be used for the sodium method, the magnesium method and other semi-dry method flue gas desulfurization processes.
Drawings
FIG. 1 is a schematic diagram of the process of the present invention.
FIG. 2 is a flow chart of a method for recycling flue gas desulfurization slag by a semidry process according to a first embodiment of the invention;
FIG. 3 is a flow chart of a method for resource utilization of flue gas desulfurization residues by a semidry process according to another embodiment of the present invention.
Detailed Description
The invention relates to a resource utilization method of semi-dry flue gas desulfurization slag, which utilizes synergistic co-production technologies of desulfurizer regeneration, sulfur dioxide acid preparation, cement manufacture and the like of the semi-dry flue gas desulfurization slag to roast the semi-dry flue gas desulfurization slag at high temperature, and sulfite and sulfate in the desulfurization slag are decomposed into SO2And CaO. Containing a certain concentration of SO2Flue gas used for preparing sulfuric acid and pure SO2、SO3And the like, and can also be used as a byproduct of ammonium sulfate products in an ammonia desulphurization device and a sulfuric acid ammonium sulfate preparation device. One part of the roasting slag mainly containing the regenerated calcium oxide is used as a desulfurizer to return to the semi-dry flue gas desulfurization for recycling, and the other part of the roasting slag can be used as a building material raw material for producing cement and the like.
The invention can be implemented by matching with one semidry flue gas desulfurization device, and also can be independently constructed to serve a plurality of sets of semidry flue gas desulfurization devices at the periphery.
The mechanism of the invention is shown in figure 1;
a resource utilization method of flue gas desulfurization slag by a semidry method comprises the following steps: and (2) delivering the semi-dry desulphurization slag generated by the semi-dry desulphurization device to a high-temperature roasting device for high-temperature roasting, decomposing sulfite and sulfate in the desulphurization slag into sulfur dioxide and calcium oxide after roasting, carrying the sulfur dioxide out of the high-temperature roasting device along with roasting smoke, and leaving the calcium oxide in the roasting slag to be discharged out of the high-temperature roasting device.
And (3) sending the roasting flue gas containing sulfur dioxide to an ammonia desulphurization device or a sulfuric acid production device for recycling sulfur dioxide after dust removal and purification.
The ash slag obtained by dedusting and purifying the roasting flue gas and the roasting slag enter a roasting slag warehouse, part of the roasting slag is digested and then returns to a semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and part of the roasting slag is used for producing building materials such as cement.
The carbon doped by high-temperature roasting is prepared from the following components in percentage by weight: the desulfurized slag entering the high-temperature roasting furnace is mixed with slagCalcium sulfate salt (including CaSO)4) Anthracite, coke and other substances of simple substance carbon with 1-4 times of the molar weight (the amount of calcium sulfate to be measured), particularly in the form of powder, wherein the average particle size (most of the powder is distributed in the interval) of the powder is 0.2-10 mm, the high-temperature roasting temperature is 500-1200 ℃, and the roasting temperature is increased along with the increase of the sulfate content (weight ratio) in the desulphurization slag. Such as CaSO4The high-temperature roasting temperature is 900-1200 ℃ when the content (weight ratio) reaches 60%; in conclusion, the total decomposition conversion rate of sulfite and sulfate of the high-temperature roasting is controlled to be more than 90 percent.
The high-temperature roasting furnace can be selected from a horizontal rotary kiln, a vertical roasting furnace, a fluidized bed roasting furnace and the like.
The sulfur dioxide content of the roasting flue gas is 3-13%.
The roasting flue gas containing sulfur dioxide enters an ammonia desulphurization device to remove sulfur dioxide by ammonia, and a byproduct ammonium sulfate product is obtained.
The roasting flue gas containing sulfur dioxide enters a sulfuric acid production device, and by-products of sulfuric acid, pure sulfur dioxide, pure sulfur trioxide and the like are produced.
The sulfuric acid production device is matched with the sulfuric acid ammonium sulfate preparation device, and the by-product sulfuric acid reacts with ammonia to prepare an ammonium sulfate solid product, so that the ammonium sulfate solid product is convenient to store and sell.
More than 3 percent of high-temperature roasting slag is taken as raw materials of calcium oxide and calcium sulfate for producing building materials such as cement and the like, and the raw materials are supplied to a cement production device and the like to produce building material products such as cement and the like. The rest of the roasting slag enters a lime slaking device and is slaked by adding water, then the calcium oxide is converted into calcium hydroxide which returns to the semidry flue gas desulfurization device to be used as a desulfurizer.
The first embodiment is as follows:
the resource utilization device for the semi-dry flue gas desulfurization slag constructed by the method is used for treating the desulfurization slag of the semi-dry flue gas desulfurization of lime hydrate used by three local thermal power plants, and the capability of the device for treating the desulfurization slag is 30t/h (240 kt/a).
The method and the structure are as follows: the flow of the resource utilization method of the semidry flue gas desulfurization slag in the first embodiment is shown in figure 2.
The main characteristics are as follows: the resource utilization method of the semi-dry flue gas desulfurization slag comprises the following steps: mixing the semi-dry desulfurization slag generated by the semi-dry desulfurization device of each thermal power plant with anthracite, sending the mixture to a high-temperature roasting device (30t/h rotary kiln, waste heat recovery and waste heat boiler) for high-temperature roasting, decomposing sulfite and sulfate in the desulfurized slag into sulfur dioxide and calcium oxide after roasting, taking the sulfur dioxide out of the high-temperature roasting device along with roasting smoke, and leaving the calcium oxide in the roasted slag to be discharged out of the high-temperature roasting device.
The roasting flue gas containing sulfur dioxide is sent to a sulfuric acid production device (the capability of preparing sulfuric acid by a 240kt/a two-rotation two-absorption dry method) for recycling sulfur dioxide after dust removal and purification (cyclone dust removal and cloth bag dust removal).
The ash slag obtained by dedusting and purifying the roasting flue gas and the roasting slag enter a roasting slag warehouse together, part of the roasting slag is digested and then returns to a thermal power plant of a semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and the other part of the roasting slag is used for producing 100kt/a cement clinker.
The desulfurized slag entering the high-temperature roasting is matched with anthracite containing simple substance carbon with 2 times of the molar weight of calcium sulfate in the slag, and the high-temperature roasting temperature is controlled to be 600-800 ℃.
The total decomposition conversion rate of sulfite and sulfate roasted at high temperature is controlled to be 92-95%.
The high-temperature roasting furnace can be a horizontal rotary kiln, air and feeding materials are in countercurrent, and the length of a kiln body is 15 meters.
Controlling the input of combustion air to control the content of sulfur dioxide in the roasting flue gas to be 8-11%.
A set of device with the capability of preparing sulfuric acid by a 240kt/a two-rotation two-absorption dry method is configured, and sulfuric acid, pure sulfur dioxide and pure sulfur trioxide can be produced simultaneously.
The roasting flue gas containing sulfur dioxide enters a sulfuric acid production device, and the by-products of sulfuric acid, pure sulfur dioxide, pure sulfur trioxide and the like are sold outside.
The device is matched with a 200kt/a sulfuric acid ammonium sulfate preparation device, and the by-product sulfuric acid reacts with ammonia to prepare an ammonium sulfate solid product which is mainly sold as a chemical fertilizer.
About 6 percent of high-temperature roasting slag is taken as the raw materials of calcium oxide and calcium sulfate produced by 100kt/a cement clinker and is supplied to a cement production device as the raw materials.
And the rest of the roasting slag enters a lime slaking device and is slaked by adding water (the capacity of a slaker is 30t/h), and calcium oxide is converted into calcium hydroxide and returns to a semi-dry flue gas desulfurization device of each power plant to be used as a desulfurizer.
The effect is as follows: the device for recycling the semi-dry flue gas desulfurization slag realizes the complete recycling of the semi-dry desulfurization slag, namely, sulfur dioxide is prepared into products such as sulfuric acid, ammonium sulfate, pure sulfur dioxide, pure sulfur trioxide and the like, and the regenerated calcium oxide is used for desulfurization and cement production. The method solves the problem of disposal of the desulfurization slag of several peripheral coal-fired power plants, reduces the desulfurization dosage of the purchased slaked lime by more than 90 percent, greatly reduces the dependence and damage to natural resources, and has obvious economic benefit, environmental benefit and social benefit.
Example two:
the method is used for constructing a device for resource utilization of the semi-dry flue gas desulfurization slag, and the treatment capacity of the desulfurization slag treatment device is 3t/h, namely 24000 t/a.
The method and the structure are as follows: the flow chart of the resource utilization method of the semidry flue gas desulfurization slag in the second embodiment is shown in figure 3.
The main characteristics are as follows: the resource utilization method of the semi-dry flue gas desulfurization slag comprises the following steps: the semi-dry desulphurization slag generated by the semi-dry desulphurization device of each thermal power plant is doped with a small amount of anthracite and sent to a high-temperature roasting device (a 3t/h vertical mechanical furnace which is heated by natural gas for assistance) for high-temperature roasting, sulfite and sulfate in the desulphurization slag after roasting are decomposed into sulfur dioxide and calcium oxide, the sulfur dioxide is carried out of the high-temperature roasting device along with roasting smoke, and the calcium oxide is left in the roasting slag and discharged out of the high-temperature roasting device.
The roasting flue gas containing sulfur dioxide is sent to an ammonia desulphurization device (the flue gas treatment capacity is 150000 m) after dust removal and purification (cyclone dust removal and cloth bag dust removal)3And/h) carrying out the recycling of the sulfur dioxide.
The ash slag obtained by dedusting and purifying the roasting flue gas and the roasting slag enter a roasting slag warehouse together, part of the roasting slag is digested and then returns to a thermal power plant of the semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and part of the roasting slag is sold for production and use in a cement plant.
The desulfurized slag entering the high-temperature roasting is matched with the coke of the simple substance carbon with the molar weight of 1.5 times of the calcium sulfate in the slag, and the temperature of the high-temperature roasting is controlled between 700 and 900 ℃.
The total decomposition conversion rate of sulfite and sulfate roasted at high temperature is controlled to be 93-96%.
The high-temperature roasting furnace can be a vertical mechanical furnace, air and feeding materials are in countercurrent, and the height of the furnace body is 10 meters.
Controlling the input of combustion air to control the content of sulfur dioxide in the roasting flue gas to be 5-7%.
The amount of flue gas to be treated is 150000m3The ammonia desulphurization device removes the roasted flue gas with ammonia to prepare an ammonium sulfate solid product which is sold as a chemical fertilizer.
About 5 percent of high-temperature roasting slag is sold to a cement factory as a cement production raw material.
And the rest of the roasting slag enters a lime slaking device, is slaked by adding water (the capacity of a slaker is 3t/h), and then is converted into calcium hydroxide to return to the semi-dry flue gas desulfurization device to be used as a desulfurizer.
The effect is as follows: the device for recycling the semi-dry flue gas desulfurization slag realizes the complete recycling of the semi-dry desulfurization slag, namely, sulfur dioxide is prepared into an ammonium sulfate product, and regenerated calcium oxide is used for desulfurization and cement production. The method solves the problem of disposal of the desulfurization slag of the power plant, reduces the desulfurization dosage of the purchased slaked lime by more than 90 percent, greatly reduces the dependence and damage to natural resources, and has obvious economic benefit, environmental benefit and social benefit.
The above embodiments do not limit the present invention in any way, and all other modifications and applications that can be made to the above embodiments in equivalent ways are within the scope of the present invention.
Claims (10)
1. A resource utilization method of semi-dry desulphurization slag is characterized by comprising the following steps:
sending the semi-dry desulphurization slag generated by the semi-dry desulphurization device to a high-temperature roasting device for high-temperature roasting, doping carbon into the roasted desulphurization slag, decomposing sulfite and sulfate in the roasted desulphurization slag into sulfur dioxide and calcium oxide, taking the sulfur dioxide out of the high-temperature roasting device along with roasting smoke, and discharging the calcium oxide out of the high-temperature roasting device;
the roasting flue gas containing sulfur dioxide is sent to an ammonia desulphurization device or a sulfuric acid production device for recycling sulfur dioxide after dust removal and purification;
the high-temperature roasting flue gas is dedusted and purified to obtain ash, the ash and the roasting slag enter a roasting slag warehouse together, part of the roasting slag is digested and then returns to a semi-dry flue gas desulfurization device to be used as a desulfurizer for recycling, and part of the roasting slag is used for building material production and utilization.
2. The resource utilization method of the semi-dry flue gas desulfurization slag according to claim 1, characterized in that the desulfurization slag entering the high-temperature roasting is mixed with anthracite, coke and other substances of simple substance carbon with 1-4 times of the molar weight of calcium sulfate in the slag, the high-temperature roasting temperature is 500-1200 ℃, and the roasting temperature is increased along with the increase of the sulfate content in the desulfurization slag.
3. The resource utilization method of the flue gas desulfurization residues through the semidry process according to claim 1 or 2, characterized in that the total decomposition conversion rate of sulfite and sulfate roasted at high temperature is more than 90%.
4. The resource utilization method of the semi-dry flue gas desulfurization slag according to claim 1 or 3, characterized in that the high-temperature roasting furnace is selected from a horizontal rotary kiln, a vertical roasting furnace, a fluidized bed roasting furnace and the like.
5. The resource utilization method of the flue gas desulfurization slag by the semidry method according to claim 1, characterized in that the content of sulfur dioxide in the roasted flue gas is 3% -13% (V/V).
6. The resource utilization method of the semidry flue gas desulfurization slag according to claim 1, characterized in that the roasted flue gas containing sulfur dioxide enters an ammonia desulfurization device to remove sulfur dioxide by ammonia, and a byproduct ammonium sulfate product is obtained.
7. The resource utilization method of the flue gas desulfurization residues through the semidry process according to claim 1, characterized in that the roasting flue gas containing sulfur dioxide enters a sulfuric acid production device to produce by-products such as sulfuric acid, pure sulfur dioxide and pure sulfur trioxide.
8. The resource utilization method of the semi-dry process flue gas desulfurization slag as recited in claims 1 and 7, characterized in that the sulfuric acid production device is simultaneously matched with a sulfuric acid ammonium sulfate preparation device, and the by-product sulfuric acid reacts with ammonia to prepare an ammonium sulfate solid product, which is convenient for storage and sale.
9. The resource utilization method of the flue gas desulfurization residues by the semidry method according to claim 1, characterized in that more than 3% of the high-temperature roasting residues are used as raw materials of calcium oxide and calcium sulfate for cement production and other building materials production to produce building material products such as cement; the rest of the roasting slag enters a lime slaking device and is slaked by adding water, then the calcium oxide is converted into calcium hydroxide which returns to the semidry flue gas desulfurization device to be used as a desulfurizer.
10. The resource utilization method of the flue gas desulfurization slag by the semidry method according to claim 1 or 2, characterized in that anthracite and coke are added in the form of powder; the average particle size of the powder is 0.1mm-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318508.6A CN113083015A (en) | 2021-03-25 | 2021-03-25 | Resource utilization method for flue gas desulfurization slag by semidry process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318508.6A CN113083015A (en) | 2021-03-25 | 2021-03-25 | Resource utilization method for flue gas desulfurization slag by semidry process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113083015A true CN113083015A (en) | 2021-07-09 |
Family
ID=76669741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110318508.6A Pending CN113083015A (en) | 2021-03-25 | 2021-03-25 | Resource utilization method for flue gas desulfurization slag by semidry process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113083015A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636574A (en) * | 2021-07-14 | 2021-11-12 | 中南大学 | Method for preparing sulfur-containing chemical products by resource utilization of semi-dry desulfurization ash |
| CN113750761A (en) * | 2021-08-10 | 2021-12-07 | 东南大学 | Method for preparing wet desulfurizing agent by using semidry desulfurization ash and application |
| CN115504692A (en) * | 2022-09-27 | 2022-12-23 | 中冶南方都市环保工程技术股份有限公司 | Method for preparing carbonized cementing material and co-producing sulfuric acid by using semi-dry desulfurized fly ash |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101703872A (en) * | 2009-11-05 | 2010-05-12 | 周建安 | Method for reclaiming and treating flue gas desulfurization byproducts for sintered pellets |
| CN102001633A (en) * | 2009-09-02 | 2011-04-06 | 南化集团研究院 | Method for preparing sulfuric acid by using mixture containing magnesium sulfite as raw material |
| WO2017004923A1 (en) * | 2015-07-07 | 2017-01-12 | 沈阳化工大学 | Calcium carbonate/calcium hydrate-gypsum wet desulphurization and dedusting technique for flue gas |
| CN109499344A (en) * | 2018-12-27 | 2019-03-22 | 山东大学 | Calcium/magnesium basis wet method desulfurization and calcium sulfite/magnesium resourceization utilize system and technique |
| CN110748895A (en) * | 2019-10-29 | 2020-02-04 | 中冶南方都市环保工程技术股份有限公司 | High-sulfur waste incineration treatment system and treatment method |
| CN110817925A (en) * | 2019-10-23 | 2020-02-21 | 江苏沙钢集团有限公司 | Method for resource utilization of desulfurized fly ash |
| CN111977616A (en) * | 2020-08-18 | 2020-11-24 | 江苏省沙钢钢铁研究院有限公司 | Synergistic treatment method and system for desulfurized fly ash and desulfurized gypsum |
-
2021
- 2021-03-25 CN CN202110318508.6A patent/CN113083015A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001633A (en) * | 2009-09-02 | 2011-04-06 | 南化集团研究院 | Method for preparing sulfuric acid by using mixture containing magnesium sulfite as raw material |
| CN101703872A (en) * | 2009-11-05 | 2010-05-12 | 周建安 | Method for reclaiming and treating flue gas desulfurization byproducts for sintered pellets |
| WO2017004923A1 (en) * | 2015-07-07 | 2017-01-12 | 沈阳化工大学 | Calcium carbonate/calcium hydrate-gypsum wet desulphurization and dedusting technique for flue gas |
| CN109499344A (en) * | 2018-12-27 | 2019-03-22 | 山东大学 | Calcium/magnesium basis wet method desulfurization and calcium sulfite/magnesium resourceization utilize system and technique |
| CN110817925A (en) * | 2019-10-23 | 2020-02-21 | 江苏沙钢集团有限公司 | Method for resource utilization of desulfurized fly ash |
| CN110748895A (en) * | 2019-10-29 | 2020-02-04 | 中冶南方都市环保工程技术股份有限公司 | High-sulfur waste incineration treatment system and treatment method |
| CN111977616A (en) * | 2020-08-18 | 2020-11-24 | 江苏省沙钢钢铁研究院有限公司 | Synergistic treatment method and system for desulfurized fly ash and desulfurized gypsum |
Non-Patent Citations (1)
| Title |
|---|
| 吕天宝: "《工业脱硫及综合利用技术》", 30 April 2011, 国防工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636574A (en) * | 2021-07-14 | 2021-11-12 | 中南大学 | Method for preparing sulfur-containing chemical products by resource utilization of semi-dry desulfurization ash |
| CN113750761A (en) * | 2021-08-10 | 2021-12-07 | 东南大学 | Method for preparing wet desulfurizing agent by using semidry desulfurization ash and application |
| CN115504692A (en) * | 2022-09-27 | 2022-12-23 | 中冶南方都市环保工程技术股份有限公司 | Method for preparing carbonized cementing material and co-producing sulfuric acid by using semi-dry desulfurized fly ash |
| CN115504692B (en) * | 2022-09-27 | 2023-09-22 | 中冶南方都市环保工程技术股份有限公司 | Method for preparing carbonized cementing material and co-producing sulfuric acid by using semi-dry desulfurization ash |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113083015A (en) | Resource utilization method for flue gas desulfurization slag by semidry process | |
| CN102303883B (en) | Method for preparing calcium oxide and sulfur by double-atmosphere fluidized roasting of desulfurated gypsum | |
| CN102442650B (en) | Method for producing sulfuric acid and co-producing calcium carbide by phosphogypsum | |
| CN101343077B (en) | Method for preparing gypsum by removing boiler flue gas sulphur dioxide with white slime from ammonia alkali factory | |
| CN109928415B (en) | System and method for recovering calcium carbonate and sulfur by calcining gypsum | |
| CN101775325B (en) | Coal composite sulfur fixing agent | |
| CN103894047A (en) | Flue gas pollutant control integrated purifying and recycling process | |
| CN101780368A (en) | Low energy consumption flue gas wet desulphurization process | |
| CN100376471C (en) | Process and system of desulfurizing low concentration SO2 fume and producing sulfuric acid | |
| CN109127650A (en) | A method of utilizing cement kiln intermediate product harmless treatment electrolytic manganese residues | |
| CN103585864A (en) | Flue gas cleaning method capable of simultaneously desulfurizing and denitrifying | |
| JP2023530366A (en) | Quicklime production process and system with reduced carbon emissions | |
| CN103007718A (en) | Wet redox, desulfuration and resource utilization method for flue gas | |
| CN109592647B (en) | Process for preparing sulfur and recovering desulfurizing/nitre agent by sulfur/nitrate iron-carbon reduction | |
| CN110090550A (en) | A kind of coke oven flue gas sulfur method thermally decomposed in advance based on magnesium salts | |
| CN103599691A (en) | Technology and system for removing dust and sulfur by using coal ash | |
| CN109611853A (en) | A kind of method of dry-process cement rotary kiln collaboration processing house refuse | |
| CN108261913A (en) | Magnesium oxide semi-dry desulfurization process and system | |
| CN102040199A (en) | Recovery of sulfur dioxide by using solid thermal carrier to decompose calcium sulfite | |
| CN110052151B (en) | Calcium-cycle semi-dry desulfurization system based on cement clinker production line | |
| CN110038420A (en) | Flue gas full-dry method purifying technique | |
| CN210752064U (en) | Calcium circulation semi-dry desulfurization system for cement clinker production line | |
| CN109499344B (en) | Calcium/magnesium-based wet desulphurization and calcium sulfite/magnesium sulfite resource utilization system and process | |
| CN111573710A (en) | System and method for removing hydrogen sulfide and co-producing calcium carbonate and sulfur from gypsum | |
| CN113117494A (en) | Integrated method for flue gas desulfurization and denitrification and cementing material production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |