CN113955757A - Device and process for preparing carbon dioxide capture agent and co-producing hydrogen and alloy from carbon and gasified slag - Google Patents
Device and process for preparing carbon dioxide capture agent and co-producing hydrogen and alloy from carbon and gasified slag Download PDFInfo
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- CN113955757A CN113955757A CN202111419099.5A CN202111419099A CN113955757A CN 113955757 A CN113955757 A CN 113955757A CN 202111419099 A CN202111419099 A CN 202111419099A CN 113955757 A CN113955757 A CN 113955757A
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- plasma
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- carbon dioxide
- hydrogen
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 239000002893 slag Substances 0.000 title claims abstract description 66
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 51
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 51
- 239000001257 hydrogen Substances 0.000 title claims abstract description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 38
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 29
- 239000000956 alloy Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 69
- 238000002156 mixing Methods 0.000 claims abstract description 64
- 238000003723 Smelting Methods 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003245 coal Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 22
- 230000002745 absorbent Effects 0.000 claims abstract description 21
- 239000002250 absorbent Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002309 gasification Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 14
- 239000010881 fly ash Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 230000029087 digestion Effects 0.000 claims description 32
- 238000000926 separation method Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 6
- 239000000378 calcium silicate Substances 0.000 claims description 5
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 238000000746 purification Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
-
- 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
- B01D53/62—Carbon 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/023—Preparation by reduction of silica or free silica-containing material
- C01B33/025—Preparation by reduction of silica or free silica-containing material with carbon or a solid carbonaceous material, i.e. carbo-thermal process
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/24—Alkaline-earth metal silicates
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/002—Heated electrically (plasma)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/02—Obtaining aluminium with reducing
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1263—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction
- C22B34/1281—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction using carbon containing agents, e.g. C, CO, carbides
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to the field of coal chemical industry, in particular to a device and a process for preparing a carbon dioxide catching agent and co-producing hydrogen and alloy by carbon neutralization gasification slag, wherein the process comprises the following steps: 1) conveying the gasified residues and the water absorbent into a multistage mixing stirrer for stirring, and then conveying the mixture into a multistage crusher, wherein one part of crushed materials is used for preparing a carbon dioxide capture agent; 2) sending the other part of the crushed material into a plasma dry-process hydrogen production generator for producing hydrogen; 3) sending the gasified slag, the fly ash, the coal gangue powder and the semi-coke powder into a mixing, stirring and granulating integrated machine for mixing, stirring and granulating, and then sending the mixture into a plasma smelting blast furnace; 4) one part of combustible gas generated in the smelting process of the plasma smelting blast furnace is sent into the plasma smelting blast furnace for combustion and recycling, and the other part of the combustible gas is used for extracting hydrogen. The invention has the beneficial effects that: 1. resource supply is carried out on the gasified slag in various ways to prepare a product with high added value; 2. the carbon dioxide trapping agent with low cost is produced, low carbon emission is realized, and the method is economical and environment-friendly.
Description
Technical Field
The invention relates to the field of coal chemical industry, in particular to a device and a process for preparing a carbon dioxide catching agent and co-producing hydrogen and alloy by carbon neutralization gasification slag.
Background
China is the largest energy producing and consuming country in the world. Since china clearly proposed the struggle for achieving carbon peak-to-peak by 2030 and carbon neutralization by 2060, the "schedule" and "roadmap" for the "double carbon" goal have been of great interest. At present, the gasification slag produced in coal chemical industry all the country is more than 5000 million tons, the gasification slag buried in the original ash slag field is more than 6 hundred million tons, the utilization rate of the gasification slag is less than 20 percent, a large amount of land is occupied, and the risk of polluting underground water exists. The gasification slag comprises coarse slag and fine slag, the coarse slag is slurried coal particles, the coarse slag is melted, chilled, condensed and the like under the high-temperature and high-pressure condition of the gasification furnace, and water-containing slag discharged from a slag discharge lock hopper at the bottom of the gasification furnace has large fluctuation of residual carbon amount, generally 10-30%, the particle size is intensively distributed between 16 meshes and 4 meshes along with coal types, the operation condition of the gasification furnace, and the generated amount accounts for about 80% of the discharge amount of the gasification slag. The fine slag is water-containing slag which is obtained by carrying out primary washing, purification and precipitation on the coarse gas flow through the top of the gasification furnace, the residual carbon content is higher and generally can reach more than 30%, the particle sizes are all smaller than 16 meshes, about one third of the particle sizes is smaller than 200 meshes, and the generated amount accounts for about 20% of the discharge amount of the gasification slag.
The gasification slag contains rich carbon (10-32%) whether coarse slag or fine slag, and the sum of the dry basis contents of silicon dioxide, aluminum oxide and ferric oxide can reach more than 70%, meets the ASTM F class fly ash standard, and has certain volcanic ash activity. In addition, the gasified slag also contains inorganic substances such as calcium oxide, magnesium oxide, titanium dioxide and the like, and the characteristics are important material bases of the resource utilization technology of the gasified slag. The application of the existing gasified slag mainly comprises the following steps: building material raw materials and sintering materials are mixed in the circulating fluidized bed, and the resource utilization with high added value is little.
Disclosure of Invention
The invention aims to overcome the defects and provide the device and the process for preparing the carbon dioxide catching agent and co-producing the hydrogen and the alloy from the carbon and the gasified slag, so that the gasified slag can be recycled in various ways.
The invention achieves the aim through the following scheme: the device for preparing the carbon dioxide catching agent and co-producing hydrogen and alloy in carbon and gasified slag comprises: the system comprises a material conveying device, a multistage mixing stirrer, a multistage crusher, a plasma dry method hydrogen production generator, a mixing, stirring and granulating integrated machine, a plasma smelting blast furnace, a melting separation furnace and a hydrogen collecting device; the material conveying device comprises a plurality of material openings, the material conveying device is connected with a multistage mixing stirrer and a mixing, stirring and granulating integrated machine, the multistage mixing stirrer is sequentially connected with a multistage pulverizer, a plasma dry-process hydrogen production generator and a hydrogen collector, the mixing, stirring and granulating integrated machine is sequentially connected with a plasma smelting blast furnace and a melting and separating furnace, the plasma smelting blast furnace is also connected with the hydrogen collector, and the multistage pulverizer is also connected with the plasma smelting blast furnace and used for conveying generated carbon dioxide trapping agents.
Preferably, the material conveying device comprises a water absorbent material port, a gasified slag material port, a fly ash material port, a coal gangue powder material port and a semi-coke powder material port, the water absorbent material port is connected with the multistage mixing stirrer, and the gasified slag material port, the fly ash material port, the coal gangue powder material port and the semi-coke powder material port are connected with the mixing, stirring and granulating integrated machine.
Preferably, the multistage mixing stirrer comprises a mixing and batching stirrer, a first-stage dustproof digestion spiral stirrer and a second-stage dustproof digestion spiral stirrer, and the multistage pulverizer is a multistage superfine pulverizer; the water absorbent material port, the mixing and batching stirrer, the first-stage dustproof digestion spiral stirrer, the second-stage dustproof digestion spiral stirrer and the multi-stage superfine crusher are sequentially connected.
Preferably, the plasma smelting blast furnace is a solar multi-plasma torch blast furnace, and comprises: furnace body, solar power system, air separation machine, many plasma torch system includes: the plasma torch burner comprises a rectification power supply, a plurality of plasma torches, a burner, a fan and a cooling water system; the rectifying power supply provides a power supply, the fan and the cooling water system are connected with the plasma torch, the plasma torch is connected with the furnace body through the combustor, and the solar power generation device supplies power to the air distribution machine and the plasma torch.
Preferably, the furnace body is sequentially provided with a flue gas outlet, a feeding device, a plurality of plasma torch hot air ignition ports, a slag outlet and a molten alloy outlet from top to bottom.
Preferably, the number of the plasma torches is 1-6, and the number of the plasma torches in a single group is 1-8.
The process for preparing the carbon dioxide catching agent and co-producing the hydrogen and the alloy in the carbon and the gasified slag comprises the following steps:
1) conveying the gasified residues and the water absorbent into a multistage mixing stirrer for stirring, and then conveying the mixture into a multistage crusher, wherein one part of crushed materials is used for preparing a carbon dioxide capture agent;
2) feeding the other part of the crushed material into a plasma dry-process hydrogen production generator for producing hydrogen, and trapping carbon dioxide generated during hydrogen production by the carbon dioxide trapping agent prepared in the step 1), wherein the generated water absorbent can be recycled;
3) conveying the gasified slag, the fly ash, the coal gangue powder and the semi-coke powder into a mixing, stirring and granulating integrated machine for mixing, stirring and granulating, conveying the mixture into a plasma smelting blast furnace, conveying a smelting molten liquid into a melting and separating furnace to prepare products such as aluminum alloy, magnesium aluminum alloy, simple substance silicon, silicon carbide, calcium silicate, silicon iron, iron alloy and the like, and capturing carbon dioxide generated in the smelting process of the plasma smelting blast furnace by using a carbon dioxide capturing agent;
4) one part of combustible gas generated in the smelting process of the plasma smelting blast furnace is sent into the plasma smelting blast furnace for combustion and recycling, and the other part of the combustible gas is used for extracting hydrogen.
Preferably, the specific steps of step 1) include:
(1) pre-crushing and filtering the gasified slag by a pre-crushing filter screen to remove large hard iron particles and other impurities which are difficult to crush;
(2) sending the filtered gasification slag pre-crushed by the fine filter screen and the water absorbent into a mixing and blending stirrer for mixing and blending;
(3) mixing the materials stirred by the batching stirrer, and sending the materials to a first-stage dustproof digestion spiral stirrer for fully stirring;
(4) sending the material stirred by the first-stage dustproof digestion spiral stirrer to a second-stage dustproof digestion spiral stirrer for stirring;
(5) and (3) feeding the material stirred by the second-stage dustproof digestion spiral stirrer to a multi-stage superfine crusher for superfine crushing to prepare the carbon dioxide trapping agent.
The invention has the beneficial effects that: firstly, carrying out 100% resource utilization on the gasified slag in various modes, and preparing products with high added value, such as aluminum alloy, magnesium aluminum alloy, simple substance silicon, silicon carbide, calcium silicate, ferrosilicon, ferroalloy and the like by mixing the gasified slag and other solid wastes; secondly, producing the low-cost carbon dioxide trapping agent, and recycling and trapping the carbon dioxide generated in the production process to realize low-carbon emission, low energy consumption and low pollution; thirdly, combustible gas generated by the plasma smelting blast furnace is recycled, and energy is saved by more than 80%; fourthly, direct ignition is realized by adopting pure oxygen combustion of multiple plasma torches, the temperature in the furnace is obviously increased, and the rapid chemical reaction of materials is promoted; and fifthly, the production cost is greatly reduced, the solar power supply can save the power supply of a power grid, and the solar power supply is economical and environment-friendly.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the structure of a multiple plasma torch system;
FIG. 3 is a schematic flow diagram of a process for manufacturing magnesium aluminum alloy by a solar multi-plasma torch blast furnace;
FIG. 4 is a schematic flow diagram of the process of the present invention;
FIG. 5 is a schematic flow diagram of a process for producing a carbon dioxide capture agent from gasification slag;
FIG. 6 is a schematic flow chart of a process for separating high calorific value clean coal from gasification slag.
Detailed Description
The invention is further described below with reference to specific embodiments, but the scope of protection of the invention is not limited thereto:
example (b): as shown in figure 1, the device for preparing the carbon dioxide catching agent and co-producing hydrogen and alloy in carbon and gasified slag comprises: the system comprises a material conveying device, a multistage mixing stirrer, a multistage crusher, a plasma dry method hydrogen production generator, a mixing, stirring and granulating integrated machine, a plasma smelting blast furnace, a melting separation furnace and a hydrogen collecting device; the material conveying device comprises a water absorbent material port, a gasified slag material port, a fly ash material port, a coal gangue powder material port and a semi-coke powder material port, the water absorbent material port is connected with a multistage mixing stirrer, the gasified slag material port, the fly ash material port, the coal gangue powder material port and the semi-coke powder material port are connected with a mixing and stirring granulation all-in-one machine, the multistage mixing stirrer is sequentially connected with a multistage crusher, a plasma dry method hydrogen generator and a hydrogen collector, the mixing and stirring granulation all-in-one machine is sequentially connected with a plasma smelting blast furnace and a melting separation furnace, the plasma smelting blast furnace is further connected with the hydrogen collector, and the multistage crusher is further connected with the plasma smelting blast furnace and used for conveying the generated carbon dioxide collecting agent.
The multistage mixing stirrer in the embodiment is composed of a mixing ingredient stirrer, a first-stage dustproof digestion spiral stirrer and a second-stage dustproof digestion spiral stirrer, wherein the mixing ingredient stirrer, the first-stage dustproof digestion spiral stirrer and the second-stage dustproof digestion spiral stirrer are produced by the company; the water absorbent material port, the mixing and batching stirrer, the first-stage dustproof digestion spiral stirrer, the second-stage dustproof digestion spiral stirrer and the multi-stage superfine crusher are sequentially connected.
The process for preparing the carbon dioxide catching agent and co-producing hydrogen and alloy from carbon and gasified slag based on the device comprises the following steps as shown in figure 4:
1) conveying the gasified residues and the water absorbent into a multistage mixing stirrer for stirring, conveying the mixture into a multistage crusher, and preparing a carbon dioxide capture agent by using a part of crushed materials, wherein the preparation of the carbon dioxide capture agent specifically comprises the following steps as shown in figure 5:
(1) pre-crushing and filtering the gasified slag by a pre-crushing filter screen to remove large hard iron particles and other impurities which are difficult to crush;
(2) sending the filtered gasification slag pre-crushed by the fine filter screen and the water absorbent into a mixing and blending stirrer for mixing and blending;
(3) mixing the materials stirred by the batching stirrer, and sending the materials to a first-stage dustproof digestion spiral stirrer for fully stirring; preferably, the stirring time of the first-stage dustproof digestion spiral stirrer is 1-120 minutes, the rotating speed is 30-1500 revolutions per minute, the stirring time of the first-stage dustproof digestion spiral stirrer in the embodiment is 60 minutes, and the rotating speed is 100 revolutions per minute;
(4) sending the material stirred by the first-stage dustproof digestion spiral stirrer to a second-stage dustproof digestion spiral stirrer for stirring; preferably, the stirring time of the second-stage dustproof digestion spiral stirrer is 1-60 minutes, the rotating speed is 100-3000 r/min, the stirring time of the second-stage dustproof digestion spiral stirrer in the embodiment is 30 minutes, and the rotating speed is 2000 r/min;
(5) the material stirred by the second-stage dustproof digestion spiral stirrer is sent to a multi-stage superfine crusher for superfine crushing to prepare a carbon dioxide catching agent; the superfine grinding mesh number of a multi-stage superfine grinder is 30-1000 meshes, and the grinding mesh number in the embodiment is 600 meshes; preferably, the multi-stage ultrafine pulverizer has a pulverizing type of 2-6-stage hammer head type pulverizer or 2-4-stage roller type pulverizer, and the multi-stage ultrafine pulverizer in this embodiment has a type of 4-stage hammer head type pulverizer.
Preferably, the water absorbent is one or more of 30-600 mesh kaolin powder, lime powder (calcium oxide), fly ash, coal gangue powder, bentonite powder and magnesium ore powder.
The formula ratio of the gasified slag to the water absorbent is preferably 1: 0.5-9.5.
The main reaction that one-level dustproof digestion spiral agitator and the dustproof digestion spiral agitator of second grade were accomplished includes:
CaO+H2O——Ca(OH)2 (1)
K2O+H2O——2KOH (2)
Na2O+H2O——2NaOH (3)
(1) h in the formulae (2) and (3)2O is the internal water and the external water in the gasified slag.
2) And (2) sending the other part of the crushed material into a plasma dry-process hydrogen production generator for producing hydrogen, and trapping carbon dioxide generated in hydrogen production by using the carbon dioxide trapping agent prepared in the step 1), wherein the generated water absorbent can be recycled.
The hydrogen production temperature of the plasma dry method hydrogen production generator is preferably 500-1600 ℃.
The main reactions of the plasma dry-method hydrogen production generator for hydrogen production preferably comprise:
Ca(OH)2——CaO+H2O (4)
2KHO——K2O+H2O (5)
2NaHO——Na2O+H2O (6)
(4) h in the formulae (5) and (6)2O is water vapor.
C+H2O——H2+CO (7)
C+CO——H2+CO2 (8)
CO2+C——2CO (9)
(7) C in the formulas (8), (9) is fixed carbon in the gasified slag.
3) The method comprises the steps of feeding gasified slag, fly ash, coal gangue powder and semi-coke powder into a mixing, stirring and granulating integrated machine, mixing, stirring and granulating, then feeding the mixture into a plasma smelting blast furnace, feeding a smelting molten liquid into a melting and separating furnace to prepare products such as aluminum alloy, magnesium aluminum alloy, simple substance silicon, silicon carbide, calcium silicate, ferrosilicon, ferroalloy and the like, and capturing carbon dioxide generated in the smelting process of the plasma smelting blast furnace by using a carbon dioxide capturing agent.
The temperature of the plasma smelting blast furnace is preferably 1300-2800 ℃.
Preferably, the main reactions finished by the plasma smelting blast furnace smelting comprise:
Al2O3+3CO——2Al+3CO2 (10)
SiO2+2CO——2Si+2CO2 (11)
Fe2O3+3CO——2Fe+3CO2 (12)
MgO+CO——Mg+CO2 (13)
TiO2+2CO——Ti+2CO2 (14)
CaCO3——CaO+CO2 (15)
CaO+SiO2——CaSiO3 (16)
CaO+CO——CaC2+CO2 (17)
3Fe+4Si——Fe3Si4 (18)
4Mg+3Al——Mg4Al3 (19)
4) one part of combustible gas generated in the smelting process of the plasma smelting blast furnace is sent into the plasma smelting blast furnace for combustion and recycling, and the other part of combustible gas is used for directly extracting hydrogen and producing hydrogen.
The fixed carbon in the gasified slag can not only participate in the preparation of the carbon dioxide catching agent, but also directly select the clean coal with high calorific value, and as shown in figure 6, the specific operation steps are as follows:
the first step is as follows: crushing and filtering the gasified slag by a pre-crushing filter screen to remove large hard iron particles and other impurities which are difficult to crush;
the second step is that: the pre-screened particles are sent to a fluidized bed furnace dryer for drying, and the generated flue gas is captured by a carbon dioxide capturing agent;
the third step: and crushing and separating the dried particles to screen out clean coal and fine ash powder.
In the embodiment, the mesh number of the crushing and separating sieve is preferably 5-600 meshes, wherein the mesh number of clean coal is 5-100 meshes, the combustion value is 3000-6000 kilocalories, the water content is lower than 5%, and the raw material can be used for preparing products such as aluminum alloy and the like; the mesh number of the fine ash powder is 100-600 meshes, the combustion value is close to 0, the water content is lower than 5 percent, and the humic acid fertilizer can be prepared.
In order to further save energy, the plasma smelting blast furnace in the embodiment is a solar multi-plasma torch blast furnace, and comprises: the furnace body is provided with a flue gas outlet, a feeding device, a plasma torch hot air ignition hole, a slag hole and a molten alloy outlet from top to bottom in sequence. As shown in fig. 2, the multiple plasma torch system includes: the plasma torch burner comprises a rectification power supply, three plasma torches, a burner, a fan and a cooling water system; the rectifying power supply provides a power supply, the fan and the cooling water system are connected with the plasma torch, the plasma torch is connected with a hot air ignition port of the plasma torch through the combustor, and the solar power generation device supplies power to the air distribution machine and the plasma torch.
The rectification power supply device mainly comprises a rectifier transformer, a high-power silicon-controlled rectifier bridge, a smoothing reactor and a corresponding control system, and is used for converting three-phase alternating current into a direct current working power supply required by the plasma torch and providing power requirements and control for the plasma torch.
The plasma torch is the core device of the system for generating the arc plasma. The plasma torch provides a chamber for multistage flame amplification, as shown in fig. 2, comprising a stage 1 flame, a stage 2 flame and a stage three flame, which are mounted on the wall of the furnace body and connected to the primary air duct (oxygen + combustible gas recovered from flue gas).
The high-aluminum pulverized coal feeding device is arranged above the burner, the mounting point is positioned above the center of the equal level 1 flame high-temperature area, and the high-aluminum pulverized coal is fed into the burner to be combusted with oxygen so as to ignite the blast furnace.
The fan and the cooling water system are important auxiliary systems of the plasma torch. The fan provides gas for the plasma torch to run, compressed air is used for separating oxygen, and combustible gas recovered by flue gas is added. The cooling water system is used for cooling the electrode in the operation of the plasma torch, and ensures that the electrode is not damaged by high temperature generated by electric arc.
As shown in fig. 3, the operation steps are as follows:
the method comprises the following steps: turning on a power switch of a solar power generation accumulator, feeding the gasified slag, the high-alumina coal powder and the pure oxygen separated by the air separation machine into a plasma torch, wherein the plasma torch is communicated with a hot air ignition port of the plasma torch to ignite the reaction in the furnace and provide hot air;
step two: after proportioning, metering and weighing the sintering material, the high-alumina fly ash, the magnesium gangue powder, the kaolin powder, the magnesium ore powder and the high-alumina coal coke, sending the mixture to a mixing stirrer for mixing and stirring, conveying the mixture to a feeding device at the top of a furnace body through a belt, and carrying out rapid reaction in the furnace;
step three: discharging flue gas generated by the reaction from a flue gas outlet, carrying out gas-solid separation treatment, conveying the powder oxide into a mixing stirrer for stirring, conveying combustible gas into a plasma torch, and collecting and recycling carbon dioxide;
step four: slag is discharged from a slag outlet at the bottom of the furnace body and is used for preparing calcium silicate heat-insulating refractory materials;
step five: and the molten alloy generated by the reaction is sent into a molten alloy separation and purification furnace from a molten alloy outlet at the bottom of the furnace body through a torpedo type alloy water tank truck for separation, and iron-titanium alloy, simple substance silicon and magnesium-aluminum alloy are sequentially extracted.
The separation temperature of the molten alloy separation and purification furnace in the fifth step is respectively as follows:
when the temperature of the molten alloy separation and purification furnace is reduced to 1460-1500 ℃, the ferrotitanium alloy is changed from a molten liquid state to a solid state, and the ferrotitanium alloy is extracted.
When the temperature of the molten alloy separation and purification furnace is reduced to 700-1000 ℃, the simple substance silicon is changed into a solid state from a molten liquid state, and the simple substance silicon is extracted.
When the temperature of the molten alloy separation and purification furnace is reduced to 500-550 ℃, the magnesium-aluminum alloy is changed from a molten liquid state to a solid state, and the magnesium-aluminum alloy is extracted.
The furnace body can be divided into a furnace body layer, a furnace waist layer and a furnace belly layer, the temperature of the furnace body layer area is 200-plus-1000 ℃, the temperature of the furnace waist layer area is 1800-plus-2300 ℃, and the temperature of the furnace belly layer area is 2000-plus-2800 ℃. According to the scale, the height of the small furnace body is 5-20 meters, the volume of the inner cavity is 15-500 cubic meters, the height of the medium furnace body is 21-50 meters, the volume of the inner cavity is 501-1000 cubic meters, the height of the large furnace body is 51-70 meters, the volume of the inner cavity is 1001-3000 cubic meters, the height of the super-large furnace body is 71-120 meters, the volume of the inner cavity is 3001-6000 cubic meters, the height of the super-large furnace body is 121-300 meters, and the volume of the inner cavity is 6001-20000 cubic meters.
In addition, a solar power generation battery or a solar power generation film is arranged on the outer wall of the furnace body to supply power to various motor devices, so that the power consumption of a power grid is saved.
While the invention has been described in connection with specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The device for preparing the carbon dioxide catching agent and co-producing hydrogen and alloy in carbon and gasification slag is characterized by comprising the following steps: the system comprises a material conveying device, a multistage mixing stirrer, a multistage crusher, a plasma dry method hydrogen production generator, a mixing, stirring and granulating integrated machine, a plasma smelting blast furnace, a melting separation furnace and a hydrogen collecting device; the material conveying device comprises a plurality of material openings, the material conveying device is connected with a multistage mixing stirrer and a mixing, stirring and granulating integrated machine, the multistage mixing stirrer is sequentially connected with a multistage pulverizer, a plasma dry-process hydrogen production generator and a hydrogen collector, the mixing, stirring and granulating integrated machine is sequentially connected with a plasma smelting blast furnace and a melting and separating furnace, the plasma smelting blast furnace is also connected with the hydrogen collector, and the multistage pulverizer is also connected with the plasma smelting blast furnace and used for conveying generated carbon dioxide trapping agents.
2. The device for preparing the carbon dioxide capture agent and co-producing the hydrogen and the alloy according to claim 1, wherein the material conveying device comprises a water absorbent material port, a gasified slag material port, a fly ash material port, a coal gangue powder material port and a semi-coke powder material port, the water absorbent material port is connected with the multistage mixing stirrer, and the gasified slag material port, the fly ash material port, the coal gangue powder material port and the semi-coke powder material port are connected with the mixing, stirring and granulating integrated machine.
3. The apparatus for preparing the carbon dioxide catching agent and co-producing hydrogen and the alloy according to the claim 2, wherein the multi-stage mixing agitator comprises a mixing and blending agitator, a first-stage dustproof digestion spiral agitator and a second-stage dustproof digestion spiral agitator, and the multi-stage pulverizer is a multi-stage superfine pulverizer; the water absorbent material port, the mixing and batching stirrer, the first-stage dustproof digestion spiral stirrer, the second-stage dustproof digestion spiral stirrer and the multi-stage superfine crusher are sequentially connected.
4. The apparatus for producing the carbon dioxide capture agent and co-producing the hydrogen and the alloy in the carbon according to claim 3, wherein the plasma smelting blast furnace is a solar multi-plasma torch blast furnace, comprising: furnace body, solar power system, air separation machine, many plasma torch system includes: the plasma torch burner comprises a rectification power supply, a plurality of plasma torches, a burner, a fan and a cooling water system; the rectifying power supply provides a power supply, the fan and the cooling water system are connected with the plasma torch, the plasma torch is connected with the furnace body through the combustor, and the solar power generation device supplies power to the air distribution machine and the plasma torch.
5. The apparatus of claim 4, wherein the furnace body is provided with a flue gas outlet, a feeding device, a plurality of plasma torch hot air ignition ports, a slag outlet and a molten alloy outlet from top to bottom.
6. The device for producing the carbon dioxide trapping agent and the hydrogen and the alloy in the carbon according to any one of claims 1 to 4, wherein the number of the plasma torches is 1 to 6, and the number of the plasma torches in a single group is 1 to 8.
7. The process for preparing the carbon dioxide catching agent and co-producing the hydrogen and the alloy from the carbon and the gasification slag is characterized by comprising the following steps of:
1) conveying the gasified residues and the water absorbent into a multistage mixing stirrer for stirring, and then conveying the mixture into a multistage crusher, wherein one part of crushed materials is used for preparing a carbon dioxide capture agent;
2) feeding the other part of the crushed material into a plasma dry-process hydrogen production generator for producing hydrogen, and trapping carbon dioxide generated during hydrogen production by the carbon dioxide trapping agent prepared in the step 1), wherein the generated water absorbent can be recycled;
3) conveying the gasified slag, the fly ash, the coal gangue powder and the semi-coke powder into a mixing, stirring and granulating integrated machine for mixing, stirring and granulating, conveying the mixture into a plasma smelting blast furnace, conveying a smelting molten liquid into a melting and separating furnace to prepare products such as aluminum alloy, magnesium aluminum alloy, simple substance silicon, silicon carbide, calcium silicate, silicon iron, iron alloy and the like, and capturing carbon dioxide generated in the smelting process of the plasma smelting blast furnace by using a carbon dioxide capturing agent;
4) one part of combustible gas generated in the smelting process of the plasma smelting blast furnace is sent into the plasma smelting blast furnace for combustion and recycling, and the other part of the combustible gas is used for extracting hydrogen.
8. The process for preparing the carbon dioxide catching agent and co-producing the hydrogen and the alloy from the carbon and the gasified slag according to the claim 7, wherein the specific steps of the step 1) comprise:
(1) pre-crushing and filtering the gasified slag by a pre-crushing filter screen to remove large hard iron particles and other impurities which are difficult to crush;
(2) sending the filtered gasification slag pre-crushed by the fine filter screen and the water absorbent into a mixing and blending stirrer for mixing and blending;
(3) mixing the materials stirred by the batching stirrer, and sending the materials to a first-stage dustproof digestion spiral stirrer for fully stirring;
(4) sending the material stirred by the first-stage dustproof digestion spiral stirrer to a second-stage dustproof digestion spiral stirrer for stirring;
(5) and (3) feeding the material stirred by the second-stage dustproof digestion spiral stirrer to a multi-stage superfine crusher for superfine crushing to prepare the carbon dioxide trapping agent.
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