CN105935550A - Composite treatment agent for acid gas and heavy metal and treating method for acid gas and heavy metal - Google Patents
Composite treatment agent for acid gas and heavy metal and treating method for acid gas and heavy metal Download PDFInfo
- Publication number
- CN105935550A CN105935550A CN201510981166.0A CN201510981166A CN105935550A CN 105935550 A CN105935550 A CN 105935550A CN 201510981166 A CN201510981166 A CN 201510981166A CN 105935550 A CN105935550 A CN 105935550A
- Authority
- CN
- China
- Prior art keywords
- hydroxide
- heavy metal
- basicity
- sulfate
- double salt
- 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.)
- Granted
Links
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 73
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 67
- 239000002131 composite material Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 43
- 239000002253 acid Substances 0.000 title abstract description 22
- 150000003839 salts Chemical class 0.000 claims abstract description 51
- 150000001875 compounds Chemical class 0.000 claims abstract description 36
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 30
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 30
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 29
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 27
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 27
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 26
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 16
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 7
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 claims abstract description 6
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims abstract description 6
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims abstract description 6
- 229940007718 zinc hydroxide Drugs 0.000 claims abstract description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 6
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 83
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 41
- 230000000994 depressogenic effect Effects 0.000 claims description 31
- 239000002912 waste gas Substances 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 6
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- -1 hydrogen Magnesium oxide Chemical class 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- ZGBSOTLWHZQNLH-UHFFFAOYSA-N [Mg].S(O)(O)(=O)=O Chemical compound [Mg].S(O)(O)(=O)=O ZGBSOTLWHZQNLH-UHFFFAOYSA-N 0.000 claims 1
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 abstract description 14
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract description 7
- 235000019341 magnesium sulphate Nutrition 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 abstract 1
- 239000005750 Copper hydroxide Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 229910001956 copper hydroxide Inorganic materials 0.000 abstract 1
- 229960004887 ferric hydroxide Drugs 0.000 abstract 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 29
- 235000011116 calcium hydroxide Nutrition 0.000 description 25
- 239000000834 fixative Substances 0.000 description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 24
- 230000000694 effects Effects 0.000 description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 16
- 235000011007 phosphoric acid Nutrition 0.000 description 15
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 14
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 14
- 239000000203 mixture Substances 0.000 description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 12
- 230000001603 reducing effect Effects 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 11
- 239000003513 alkali Substances 0.000 description 10
- 238000004090 dissolution Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 7
- 239000002956 ash Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000002386 leaching Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 5
- 229910000514 dolomite Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000001117 sulphuric acid Substances 0.000 description 5
- 235000011149 sulphuric acid Nutrition 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000007922 dissolution test Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000003556 assay Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 235000019832 sodium triphosphate Nutrition 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 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 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052586 apatite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229960002089 ferrous chloride Drugs 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 2
- 229910000358 iron sulfate Inorganic materials 0.000 description 2
- LDHBWEYLDHLIBQ-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide;hydrate Chemical compound O.[OH-].[O-2].[Fe+3] LDHBWEYLDHLIBQ-UHFFFAOYSA-M 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
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 239000011833 salt mixture Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910020662 PbSiO3 Inorganic materials 0.000 description 1
- 239000005819 Potassium phosphonate Substances 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001583 allophane Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 229910052898 antigorite Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 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
- 229910052626 biotite Inorganic materials 0.000 description 1
- ZWHCFDOODAQLLX-UHFFFAOYSA-D bis[(2-oxo-1,3,2lambda5,4lambda2-dioxaphosphaplumbetan-2-yl)oxy]lead chloro-[(2-oxo-1,3,2lambda5,4lambda2-dioxaphosphaplumbetan-2-yl)oxy]lead Chemical compound [Cl-].[Pb+2].[Pb+2].[Pb+2].[Pb+2].[Pb+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O ZWHCFDOODAQLLX-UHFFFAOYSA-D 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 235000001465 calcium Nutrition 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229940087373 calcium oxide Drugs 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- VAFHLRJDFQQRMR-UHFFFAOYSA-L chloro-dioxido-oxo-lambda5-phosphane lead(2+) Chemical compound [Pb++].[O-]P([O-])(Cl)=O VAFHLRJDFQQRMR-UHFFFAOYSA-L 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- YXXXKCDYKKSZHL-UHFFFAOYSA-M dipotassium;dioxido(oxo)phosphanium Chemical compound [K+].[K+].[O-][P+]([O-])=O YXXXKCDYKKSZHL-UHFFFAOYSA-M 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229940005740 hexametaphosphate Drugs 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 235000001055 magnesium Nutrition 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- QQFLQYOOQVLGTQ-UHFFFAOYSA-L magnesium;dihydrogen phosphate Chemical compound [Mg+2].OP(O)([O-])=O.OP(O)([O-])=O QQFLQYOOQVLGTQ-UHFFFAOYSA-L 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- 235000019785 monomagnesium phosphate Nutrition 0.000 description 1
- 229910000401 monomagnesium phosphate Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- MPNNOLHYOHFJKL-UHFFFAOYSA-N peroxyphosphoric acid Chemical compound OOP(O)(O)=O MPNNOLHYOHFJKL-UHFFFAOYSA-N 0.000 description 1
- 229910052628 phlogopite Inorganic materials 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052820 pyromorphite Inorganic materials 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- NCPXQVVMIXIKTN-UHFFFAOYSA-N trisodium;phosphite Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])[O-] NCPXQVVMIXIKTN-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- 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
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/68—Halogens or halogen compounds
-
- 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
- B01D53/68—Halogens or halogen compounds
- B01D53/685—Halogens or halogen compounds by treating the gases with solids
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
-
- 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
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
- B01D2258/0291—Flue gases from waste incineration plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/128—Solid reactants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a composite treatment agent for acid gas and heavy metal and a treating method for acid gas and heavy metat, which are capable of fully lowering alkalinity in flying ash in a wide additive amount range so as to solve a problem of late stage procedure of flying ash treatment caused by overdose or insufficiency of acid gas treatment agents come along with qualitative change of waste. The composite treatment agent for acid gas and heavy metal comprises a double salt and at least two chemical compounds chosen from chloride, sulfate and hydroxide, wherein the double salt contains calcium hydroxide and magnesium hydroxide. In order to achieve high raw material stability and mixing stability, the specific surface area of preferable double salt is higher than 20 m2/g, and a median particle diameter (d50) is less than 30 [mu]m. Preferably, an alkalinity lowering agent preferably contains at least two chosen from magnesium sulfate, sulfate-containing aluminium hydroxide, zinc sulfate, copper sulfate, magnesium hydroxide, aluminum hydroxide, ferric hydroxide, ferrous hydroxide, zinc hydroxide and copper hydroxide.
Description
Technical field
The present invention relates to sour gas and the composite treating agent of heavy metal and sour gas and heavy metal
Processing method.More specifically, the present invention relates to composite treating agent and compounding method, this compound place
Reason agent and compounding method be used for processing municipal refuse waste combustion stove, trade waste incinerator,
Sour gas contained in the waste gas produced in the combustion plant of power plant boiler, retort, civil plant etc.
Heavy metal contained in the flying dust produced in body (hydrogen chloride, oxysulfide etc.) and this combustion plant.
Background technology
Under normal circumstances, for containing hydrogen chloride, the waste gas of oxysulfide, entering with alkaline agents such as calcium hydroxide
After row processes, discharge by chimney via after the dust arresters such as bag hose.On the other hand, with dust arrester dust
Flying dust contains the heavy metals such as harmful lead, cadmium, after dust arrester dust, utilizes heavy metal fixative to carry out
Heavy metal stabilization processes, and then carries out landfill stabilization (for example, with reference to patent documentation 1).
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 9-99215 publication
Summary of the invention
The problem that invention is to be solved
The variation of the sour gas load that reason municipal refuse, the qualitative change of trade waste cause and lead
When the addition of cause Sour gas disposal agent significantly changes, the Sour gas disposal agent of excess may be supplied to
In flue.In this case, owing to Sour gas disposal agent is alkalescence, therefore, dust arrester dust is used
Flying dust in can remain alkali compounds, even if fixing supplying heavy metal with the flying dust of dust arrester dust
Agent, this heavy metal fixative also can be consumed, and reason is, it is not only to heavy metal contained in flying dust
Being fixed, but also can with residual Sour gas disposal agent occur neutralize reaction, result sometimes without
Method suppresses heavy metal contained in flying dust aptly.
The present invention completes in view of the foregoing, it is intended that in wide in range addition scope
Basicity in interior fully reduction flying dust, thus solve the acidity produced by the qualitative change with garbage
The problem of the flying dust treatment process of the excess of gas treatment agent and the not enough back segment caused.
For solving the scheme of problem
The present inventor etc. have been repeated have concentrated on studies to realize object defined above, it was found that pass through
It is applied in combination the double salt constituted containing calcium hydroxide and magnesium hydroxide and basicity depressant is existing to substitute
The Sour gas disposal agent with slaked lime as representative, contained sour gas can be processed in waste gas, with
And reduce by the basicity of the flying dust of dust arrester dust, and after heavy metal fixative can be suppressed to process from
The leaching ability of heavy metal amount of flying dust, thus complete the present invention.Specifically, the present invention provides following side
Case.
(1) the present invention relates to the composite treating agent of a kind of sour gas and heavy metal, it comprises: containing hydrogen-oxygen
The double salt changing calcium and magnesium hydroxide and constitute and basicity depressant.
(2) moreover, it relates to the composite treating agent described in (1) in, the specific surface area of aforementioned double salt
For 20m2/ more than g, median particle diameter (d50) are less than 30 μm.
(3) moreover, it relates to the composite treating agent described in (1) or (2) in, aforementioned basicity depressant
For more than a kind compound in chloride, sulfate and hydroxide.
(4) moreover, it relates to the composite treating agent described in (3) in, aforesaid compound comprises and is selected from
Magnesium sulfate, the aluminium hydroxide of containing sulfate, zinc sulfate, copper sulfate, magnesium hydroxide, aluminium hydroxide, hydrogen
In ferrum oxide, ferrous hydroxide, zinc hydroxide and Copper hydrate more than a kind.
(5) moreover, it relates to (1)～(4) in the composite treating agent described in any one in, aforementioned acid
Property gas be sour gas contained in waste gas, aforementioned heavy metal is heavy metal contained in flying dust.
(6) moreover, it relates to a kind of sour gas and the processing method of heavy metal, add in the offgas
After the double salt constituted containing calcium hydroxide and magnesium hydroxide, flying dust is carried out dust, and after dust
Flying dust adds basicity depressant.
The effect of invention
According to the present invention, it is possible not only to process sour gas contained in waste gas aptly, it is also possible to reduce
The basicity of flying dust, result can also suppress the leaching ability of heavy metal from flying dust after the process of heavy metal fixative
Amount.
Accompanying drawing explanation
Fig. 1 represents the Sketch of the simulation dust arrester Lab-evaluation device used in embodiment.
Fig. 2 represents in addition and the device shown in Fig. 1 of the various inorganic agents of embodiment and comparative example
The relation of hydrogen chloride gas clearance.
Fig. 3 represents the addition of the various inorganic agents of embodiment and comparative example and by the device shown in Fig. 1
The relation of the basicity of the residue obtained.
Detailed description of the invention
Below, embodiments of the present invention are illustrated, but these embodiments do not limit the present invention.
The composite treating agent ＞ of ＜ sour gas and heavy metal
The composite treating agent of the present invention comprises: the double salt constituted containing calcium hydroxide and magnesium hydroxide and alkali
Degree depressant.
(double salt)
Double salt using calcium hydroxide and magnesium hydroxide as required constituent.The manufacture method of double salt is not had
There is restriction especially, as simply example, can enumerate: to dolomite (dolomite, CaMg (CO3)2)
Carry out roasting, and carry out hydroxide (digestion), thus obtain hydroxide dolomite (Ca (OH)2·Mg(OH)2)。
If double salt does not contains calcium hydroxide, then can not process sour gas contained in waste gas aptly,
Therefore it is the most preferred.If not containing magnesium hydroxide, it is likely that speculate that the effect suppressing following situation reduces,
Cannot fully reduce the basicity in flying dust, the most preferably, described situation is: the basicity of double salt is high, in system
The double salt of residual can hinder the immobilization to heavy metal contained in flying dust of the heavy metal fixative, and possibly cannot
Heavy metal contained in suppression double salt aptly；The product of calcium hydroxide and sour gas is passivated and presses down
Make later reaction.
Calcium hydroxide is not contained only, but also containing magnesium hydroxide, therefore, and without hydrogen-oxygen due to double salt
The situation changing magnesium is compared, and can suppress basicity at reduced levels.The basicity of double salt is not particularly limited,
It is preferably 500mgCaCO3/ more than g and 1000mgCaCO3/ below g, more preferably 700mgCaCO3/g
Above and 900mgCaCO3/ below g.As reference, powder is that basicity during calcium hydroxide monomer exists
1200mgCaCO3/ more than g and 1350mgCaCO3In the scope of/below g.
In this specification, basicity refers to the value obtained as described below: by sample (0.1～0.5g) with 1,000 times
The pure water (100～500ml) of amount is put in beaker, by magnetic stirrer 1 hour, uses micropipette
Device point takes ormal weight (ml) from the sample obtained from, after dropping few drops phenolphthalein indicator mixes,
The sulphuric acid of titration 1/50N is to variable color (to pH8.3) rapidly, records the sulphuric acid titer (ml) of every 1g medicament,
The value calculated by following conversion formula and obtain.
(conversion formula)
Basicity (mgCaCO3/g)
=0.02{ titrated sulfuric acid concentration (mol/L) } × A (ml) ÷ B (g) × C (ml) ÷ D (ml) × 100 ÷ 2
=A (ml) ÷ B (g) × C (ml) ÷ D (ml)
In conversion formula, A be sulphuric acid titer (ml), B be sample size (g), C is pure water addition (ml),
D is point taken amount (ml) after stirring.
The composite treating agent of the present invention comprises the double salt constituted containing calcium hydroxide and magnesium hydroxide.Even if
Composite treating agent comprises the salt-mixture of magnesium hydroxide powder and calcium hydroxide powder, this mixture the most not phase
When in double salt, therefore, different from the composite treating agent of the present invention.In double salt, calcium atom and magnesium atom connect
Closely constitute a salt, and in the salt-mixture that mono-salt is each other, magnesium hydroxide powder and calcium hydroxide powder
End is in mutual scattered state.
And, double salt can get following basicity reducing effect: (a) double salt in addition to calcium hydroxide also by hydrogen
Magnesium oxide, as required constituent, thus reduces the effect of basicity of double salt itself, (b) and thinks and pass through
The product of suppression calcium hydroxide and sour gas is passivated and can be directed at inside granule by sour gas
Basicity reducing effect, (c) utilize other composition of composite treating agent i.e. a kind in sulfate etc. with
The basicity reducing effect of upper compound (basicity depressant) and (d) utilize the product with sour gas
Basicity reducing effect, therefore it could be speculated that relative to prior art, can get and the basicity of flying dust can be made to drop
As little as about 1/2, result can also suppress the special effect of the leaching ability of heavy metal amount etc from flying dust.
The specific surface area of double salt is not particularly limited, preferably 20m2/ more than g, more preferably 30m2/g
Above, more preferably 40m2/ more than g.If specific surface area is too small, then with sour gas (hydrogen chloride
Gas, sulphur oxide gas etc.) contact area little, it is possible to sour gas cannot be processed aptly.
And, the most unreacted double salt increases, and the basicity of flying dust improves, and result likely cannot press down aptly
The leaching ability of heavy metal amount from flying dust after heavy metal fixative processed process.
The median particle diameter (d50) of double salt is not particularly limited, below preferably 30 μm, more preferably
Below 20 μm.
The lower limit of median particle diameter is not particularly limited, and the median particle diameter of double salt is preferably more than 5 μm.
It should be noted that in this specification, " median particle diameter " refers to be obtained by laser diffractometry
The particle diameter that aggregate-value is 50% (d50) of the granule number in the particle size distribution in terms of volume reference.
The ratio of calcium hydroxide with magnesium hydroxide is not particularly limited, utilizes hydrogen from obtaining aptly
Calcium oxide processes the effect of sour gas and utilizes magnesium hydroxide to reduce the effect of basicity of double salt itself
Consider, with molar ratio computing, preferably at calcium hydroxide: in the range of magnesium hydroxide=0.79:1.0～3.15:1.0,
More preferably in the range of 0.96:1.0～2.36:1.0.
(basicity depressant)
The composite treating agent of the present invention comprises chloride, sulfate, hydroxide etc. and has reduction basicity work
Compound.Below, for convenience this compound is referred to as " basicity depressant ".
When composite treating agent is supplied to flue, sour gas (is wherein mainly hydroxide with above-mentioned double salt
Calcium component) react.Product in this reaction and unreacted reactant with the form of flying dust by dust arrester
Dust.Then, when adding water in the flying dust of dust, come from hydrogen-oxygen contained in unreacted double salt
The alkali composition changing calcium reacts with basicity depressant and product, it is possible to decrease the basicity of flying dust.
For basicity depressant, come from calcium hydroxide contained in unreacted double salt as long as can reduce
Alkali composition, be just not particularly limited, preferably comprise in chloride, sulfate and hydroxide
More than a kind compound.As muriatic example, can enumerate: magnesium chloride, aluminum chloride, ferrous chloride (II),
Iron chloride (III), zinc chloride, copper chloride etc..As the example of sulfate, can enumerate: magnesium sulfate, sulfur
Acid aluminum, the aluminium hydroxide of containing sulfate, ferrous sulfate (II), iron sulfate (III), zinc sulfate, copper sulfate
Deng.As the example of hydroxide, can enumerate: magnesium hydroxide, aluminium hydroxide, ferrous hydroxide (II),
Hydrated ferric oxide. (III), zinc hydroxide, Copper hydrate etc..Wherein, high from the stability of material itself, can
Heat release during supply basicity depressant is suppressed from the standpoint of reduced levels, it is preferred that basicity reduces
Agent comprises selected from magnesium sulfate, the aluminium hydroxide of containing sulfate, zinc sulfate, copper sulfate, magnesium hydroxide, hydrogen
In aluminium oxide, hydrated ferric oxide., ferrous hydroxide, zinc hydroxide, Copper hydrate more than a kind.
The ratio of double salt with basicity depressant is not particularly limited, multiple from utilization all can be obtained aptly
Calcium hydroxide contained in salt and process the effect of sour gas, utilize magnesium hydroxide fall contained in double salt
The effect of the basicity of low double salt own, utilize basicity depressant to reduce the effect of flying dust basicity from the standpoint of,
By quality ratio, preferably at double salt: in the range of basicity depressant=10:0.5～10:8, more preferably exist
In the range of 10:1～10:6.It addition, when setting the ratio of double salt and basicity depressant, so that flying dust
Basicity is preferably 100mgCaCO3/ below g, more preferably 70mgCaCO3/ below g, more preferably
50mgCaCO3The mode of/below g is set.
(other composition)
As long as in not hindering the scope of the present invention, composite treating agent can also comprise and double salt and basicity fall
Low dose of other different composition.As other composition, such as, can enumerate: process contained by sour gas
The activated carbon of two English, the kieselguhr etc. of filtration adjuvant as bag hose.It addition, composite treating agent is also
Heavy metal fixative can be comprised, in such a case, it is possible to omit the mixed processes of heavy metal fixative,
It it is effective method.
(manufacture method of composite treating agent)
Above-mentioned various compositions can be mixed to come by utilizing currently known method by composite treating agent equably
Obtain.
＜ sour gas and processing method ＞ of heavy metal
The processing method of the present invention includes following operation: by flue and right for the supply of above-mentioned composite treating agent
Sour gas contained in waste gas processes, and then flying dust is carried out dust, with heavy metal fixative pair
Heavy metal contained in flying dust after dust processes.
The kind of waste gas is not particularly limited, such as, can enumerate: municipal refuse waste combustion stove,
The combustion plant of trade waste incinerator, power plant boiler, retort, civil plant etc. produces
Comprise the waste gas of the sour gas such as hydrogen chloride, oxysulfide.
For supplying the opportunity of composite treating agent, as long as being before dust arrester dust flying dust, just do not have yet
Limit especially, such as, can enumerate: incinerate the moment of garbage etc. with incinerator；By giving up that incineration produces
Gas is by flue, to the moment arrived between the temperature-reducing tower that the temperature to waste gas is lowered the temperature；Use temperature-reducing tower
After being cooled down by waste gas, the waste gas after cooling is located at the moment etc. of dust arrester bag hose nearby to arriving.
The quantity delivered of composite treating agent is not particularly limited, in order to avoid very few, too much the appointing of quantity delivered
Meaning situation, it is preferred that monitoring is by the concentration of the sour gas of flue, while suitably adjusting
Joint, supplies in the way of the management objectives value of each combustion plant of object to make it meet.
After by composite treating agent supply to flue, to the product with sour gas Yu composite treating agent
And unreacted reactant carries out dust as the flying dust of respective composition.The dust of flying dust is carried out with known dust arrester
?.
Here, illustrate as a example by the mode processing waste gas with composite treating agent, but as other side
Formula, it is also possible to take double salt supply to flue, carry out flying dust adding in dust, flying dust after dust
Add the mode of basicity depressant.It should be noted that when adding double salt and basicity depressant respectively, can
Basicity depressant is added with the form with aqueous solution, slurry.
In the present invention, according to following effect, the basicity of the flying dust after dust is positively retained at reduced levels:
A magnesium hydroxide is also thus reduced double salt as required constituent in addition to calcium hydroxide by () double salt
Basicity effect itself and (b) utilize the sour gas of basicity depressant and the unreacted component of double salt and
The according to circumstances basicity reducing effect of the product of sour gas and double salt.Therefore, even without a huge sum of money
Belong to heavy metal contained in the flying dust after fixative processes dust, it is possible to the dissolution of the heavy metals such as suppression lead.
But, in the case of the leaching ability of heavy metal or leaching ability of heavy metal in addition to lead of trace, preferably with weight
Metal fixative processes heavy metal contained in the flying dust after dust.
As heavy metal fixative, can enumerate: normally used organic chelated system heavy metal fixative,
Inorganic system heavy metal fixative etc..As inorganic system heavy metal fixative, can enumerate: phosphoric acid based compound,
Silicon dioxide based compound, iron containing compounds and acid acceptor, it is possible to use selected from therein at least one
More than Zhong.
Phosphoric acid based compound demonstrates the long-term fixed effect to the heavy metal in disposal site, protects from environment
It it is effective material from the viewpoint of protecting.Phosphoric acid based compound can be anti-with such as lead as heavy metal
Should, form chlorophosphate lead (Chloropyromorphite (Pb5(PO4)3Cl)), di lead
(Hydroxypyromorphite(Pb5(PO4)3OH)), lead is fixed with the form of mineral.
As phosphoric acid based compound, as long as just can use without particular limitation containing phosphoric acid, Ke Yishi
Phosphate can also be mineral.As concrete example, such as, can enumerate: orthophosphoric acid (Orthophosphoric
Acid), polyphosphoric acids, Metaphosphoric acid, hypophosphorous acid, phosphorous acid, ortho phosphorous acid, pyrophosphoric acid, peroxophosphoric acid,
Sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium phosphate, phosphorus
Acid dihydride calcium, dicalcium phosphate, Magnesium biphosphate, phosphoric acid hydrogen two magnesium, ammonium dihydrogen phosphate, phosphoric acid hydrogen two
Ammonium, calcium superphosphate, sodium tripolyphosphate, PTPP (potassium tripolyphosphate), sodium hexameta phosphate, hexa metaphosphoric acid potassium, burnt phosphorus
Acid sodium, potassium pyrophosphate, sodium phosphite, potassium phosphite, sodium hypophosphite, ortho phosphorous acid potassium etc..Wherein,
Orthophosphoric acid, dihydric phosphate, phosphoric acid hydrogen disalt, phosphate, tripolyphosphate, hexametaphosphate, Jiao
Phosphate, have the mineral of the form of hydroxyapatite, especially apatite (apatite compounds) display
Go out good heavy metal fixed effect.
In heavy metal, phosphoric acid based compound is particularly useful to the immobilization of lead.
For silica containing compound, it is believed that can obtain following effect: the calcium component in flying dust and two
Silicon oxide reacts and generates calcium silicates mineral (3CaO 2SiO2·3H2O), thus heavy metal is enclosed
Effect to these mineral；And silicon dioxide directly acts on heavy metal and generates the heavy metal of slightly solubility
Silicate (PbSiO3Deng), thus fix the effect of heavy metal.Silica containing compound is to a huge sum of money
Fixing of belonging to is affected by the alkali content in flying dust, in the case of the alkali content in flying dust is very big, required
Addition increases.Thus, according to the present invention, silica containing compound can also significantly be cut down required
Addition.
As long as silica containing compound contains SiO2The compound of composition, it is possible to limit the most especially
System ground uses, and can be silicon dioxide itself, it is also possible to be salt, mineral.
For silica containing compound, can enumerate: sodium silicate, potassium silicate etc. comprise alkali metal or alkali
The silicate of earth metal；Silicon ash, silica gel, active hargil, zeolite, bentonite, kaolinite, galapectite,
Antigorite, pyrophyllite (pyrophyllite), Talcum, montmorillonite, saponite, Vermiculitum, white mica, sodium
Muscovitum, illite, phlogopite, biotite, emerylite, holmesite, kaolinite chlorite (donbassite),
Sudoite (Sudou stone), clinochlore, chamosite, meerschaum, Paligorskite, imogolite,
The silicate mineral such as allophane and canbyite etc..
In heavy metal, silica containing compound is particularly useful to the immobilization of lead.
As iron containing compounds, as long as containing ferrum, can enumerate: ferrous chloride, iron chloride, sulphuric acid
Ferrous iron, iron sulfate, polyiron sulfate, iron powder etc..
In heavy metal, iron containing compounds is particularly useful to the immobilization of Cr VI, arsenic, selenium and hydrargyrum.
Acid acceptor has the effect of the stripping quantity reducing heavy metal.Acid acceptor is also residued in fly
The impact of the alkali of ash, in the case of the alkali content in residual flying dust is very big, required addition increases.Cause
And, according to the present invention, acid acceptor can also significantly cut down required addition.
As acid acceptor, can be with example: hydrochloric acid, sulphuric acid, nitric acid, aluminum chloride, polyaluminium chloride,
Aluminum sulfate etc..
Acid acceptor can be used alone, but from the viewpoint of suppression leaching ability of heavy metal further, excellent
Choosing is applied in combination with above-mentioned inorganic heavy metal fixative.It addition, be applied in combination inorganic heavy metal fixative
During with acid acceptor, it is preferred in terms of can reducing the consumption of inorganic heavy metal fixative of costliness
's.And then, it is applied in combination nertralizer and chelating system heavy metal the most also can get the effect of the present invention.
Here, the liquid-solid ratio that with the addition of the flying dust after inorganic heavy metal fixative and/or acid acceptor is
Dissolution fluid pH when 10 is preferably 8.0～11.5, especially more preferably 9.0～10.5.
Embodiment
Below, the present invention is described in further detail by embodiment, but the present invention is not implemented by these
Example limits.
The screening ＞ of ＜ basicity depressant
For basicity depressant, as long as the alkali one-tenth coming from calcium hydroxide contained in unreacted reactant can be reduced
Point, as long as more than comprise in chloride, sulfate and hydroxide a kind compound,
Just it is not particularly limited.
First, in order to confirm the effect of basicity depressant, the various compounds recorded for table 1, confirm
With or without basicity reduction effect.
For ash (basicity: the 106mgCaCO produced by municipal refuse waste combustion stove A factory3/ g,
Lead content: 4290mg/kg, lead release: 127mg/L), record with the ratio interpolation table 1 that table 1 is recorded
Various basicity depressants.Then, the basicity after supply basicity depressant is measured.Show the result in table 1.
According to table 1, for its result, various compound, confirm basicity reduction effect.
[table 1]
It addition, the sight of heat release during in order to find out stability from material self, suppression supply basicity depressant
Basicity depressant preferably from the point of view of Dian, the various compounds recorded for table 2, carry out basicity reduction
The screening of agent.
Raw material stability is by lower standing 1 week by basicity depressant and confirm outward appearance room temperature/normal being wet
Evaluate.
Compounding stability is evaluated by the following method: add the high-specific surface area hydrogen-oxygen of explanation in embodiment
Change dolomite 70 weight portion, basicity depressant 30 weight portion and water 20 weight portion, with spatula (spatula)
It is stirred, and measures the temperature rise (Δ DEG C) before and after stirring.
The result of screening is shown in table 2.
[table 2]
Be can confirm that by table 2, copper chloride, magnesium sulfate, zinc sulfate, copper sulfate, magnesium hydroxide, hydroxide
The raw material stability of aluminum, hydrated ferric oxide., ferrous hydroxide, zinc hydroxide and Copper hydrate, compounding are surely
Qualitative equal excellence, preferably as basicity depressant.
It addition, when reducing for basicity with the relation of the dissolution concentration of harmful lead, use the flying dust of B factory
Confirm.At this moment, use magnesium sulfate as basicity depressant.For the dissolution concentration of lead, based on industry
The detection method (the Japanese Environment Room notified No. 13 in 1973) of metal etc. contained in garbage is tried by dissolution
Test and obtain.Show the result in table 3.
[table 3]
Be can confirm that by table 3, when basicity reduces, lead release also reduces.
And then, for cannot meet land landfill reference value (0.3mg/L) condition, use as heavy metal
The phosphoric acid based compound (75% positive acid solution) of fixative, carries out lead under the conditions shown in Table 4 and fixes
Process.Result understands, and by reducing basicity, the required adding rate of heavy metal fixative reduces.
[table 4]
The preparation ＞ of ＜ composite treating agent etc.
(embodiment 1)
High-specific surface area hydroxide dolomite (using calcium hydroxide and magnesium hydroxide as constituent, is used
Ca(OH)2·Mg(OH)2The double salt represented, specific surface area: 50m2/ g, median particle diameter (d50): 15 μm) 70
(name of product: Ash Knight I-201, uses chemical formula to the aluminium hydroxide of weight portion and containing sulfate
Alx(SO4)y(OH)ZDeng expression compound, Kurita Water Industries Ltd. manufacture) 30 weight portions mix
Close, obtain the composite treating agent of embodiment 1.
(embodiment 2)
The aluminium hydroxide of containing sulfate is changed into magnesium sulfate (specific surface area: 5.8m2/ g, median particle diameter (d50):
228 μm), in addition, by method similarly to Example 1, obtain the composite treating agent of embodiment 2.
It should be noted that in embodiment and comparative example, " specific surface area " is to be calculated by BET method
The specific surface area gone out, " pore volume " is the pore volume calculated by BJH method.These physical property all can utilize
The determinators such as the NOVA2000 that Quanta chrome Corporation manufactures measure.It addition, in "
Value particle diameter (d50) " refer to adding up by the granule number in the particle size distribution that laser diffraction and scattering method is obtained
Value is the particle diameter (d50) of 50%, it is possible to use the SALD-2100 that Shimadzu Scisakusho Ltd manufactures etc. survey
Determine device to measure.
(comparative example 1)
By the most commercially available high response slaked lime (specific surface area: 46m2/ g, median particle diameter (d50):
7.9 μm, pore volume: 0.26ml/g) 70 weight portions and magnesium hydroxide (name of product: magnesium hydroxide 300, than
Surface area: 35m2/ g, median particle diameter: 7 μm, Konoshima Chemical Co., Ltd. manufactures) 30 weights
Mixture 70 weight portion of amount part and aluminium hydroxide 30 weight portion of the containing sulfate identical with embodiment mix
Close, obtain the composite treating agent of comparative example 1.
(comparative example 2)
By high response slaked lime 70 weight portion identical with comparative example 1 and the sulfur acid identical with embodiment
The aluminium hydroxide 30 weight portion mixing of salt, obtains the inorganic agent of comparative example 2.
(comparative example 3)
Using the high response slaked lime identical with comparative example 1 as the inorganic agent of comparative example 3.
One of the comparison of ＜ process performance ＞
Use the various of the simulation dust arrester Lab-evaluation device that Fig. 1 records, evaluation embodiment and comparative example
The process performance of inorganic agent.In this device, experimental condition is as described below.
Gas air quantity: 0.43m3/ minute
Filter area: 0.43m2
The rate of filtration: 1m/ minute
HCl concentration load: 350ppm
Dust storage chamber temperature: 180 DEG C
First, the HCl concentration of baghouse inlet is regulated to 350ppm, then, is initially supplied embodiment
And the various inorganic agents of comparative example.Automatically supply beginning 20 minutes after rise, with HCl densitometer (name of product:
HL-22, capital of a country Electronics Co., Ltd manufactures) measure outlet HCl concentration, the data that will gather every 1 minute
The HCl exit concentration that is set under experimental condition of 30 minutes meansigma methodss.Then, by entrance HCl concentration and
Outlet HCl densitometer calculates HCl clearance.Show the result in table 5 and Fig. 2.
[table 5]
In order to realize the addition of the inorganic agent needed for HCI clearance 90%
It has been confirmed that the composite treating agent of embodiment in the same manner as conventional various inorganic agents, can be suitable
Ground processes sour gas.It should be noted that in order to realize HCl clearance 90% and required in embodiment
The addition of composite treating agent be 1.4g/ minute, compared with the inorganic agent of comparative example, it can be seen that adding rate
There is a little increase, but due to the basicity by reducing flying dust as described later, adding of heavy metal fixative can be made
Dosage optimization, therefore, from including that exhaust-gas treatment and heavy metal are that there is no problem from the viewpoint of processing
Scope.
Secondly, the residue basicity measuring the filter cloth attachment under the conditions of removing respectively and obtain.Show the result in
Table 6 and Fig. 3.
[table 6]
HCI clearance is residue basicity when 90%
In the case of the composite treating agent using embodiment 1,2, basicity becomes
170mgCaCO3/ g～180mgCaCO3About/g, compared with the inorganic agent of comparative example 1～3, demonstrates aobvious
The basicity reducing effect write.It addition, the addition of composite treating agent be 0.8g/ minute～1.6g/ minute this
This tendency is all can confirm that in the wide in range scope of sample.
The ratio of ＜ process performance is than two ＞
Embodiment and the various process of comparative example are evaluated in one of the comparison in above-mentioned ＜ process performance ＞
In residue after the process performance of agent, relative to 1 weight portion residue, mix being obtained by C factory of 4 weight portions
The ash arrived, this ash is the ash of the 1st section that is not blown into Sour gas disposal agent and 2 sections of bag hoses, system
It is made model fly ash.The characteristic of the ash obtained by C factory and the characteristic of various model fly ash are as shown in table 7.
[table 7]
It should be noted that in the present embodiment, measure lead content, dissolution fluid pH and lead by the following method
Dissolution concentration.
The assay method of lead content
Flying dust concentrated nitric acid and concentrated hydrochloric acid carry out heating concentrate, cool down.After cooling, add pure water, will
The solution quantitative filter paper after dissolving (Advantech Corporation manufacture, No.6) of heating filters, with former
Sub-absorption spectrometer (Hitachi, Ltd. manufacture, Z-2000) measures the lead concentration in filtrate.
The assay method of dissolution fluid pH
After notifying that No. 13 test method(s)s carry out dissolution test based on the Japanese Environment Room, the pH carrying out dissolution fluid surveys
Fixed.
The assay method of lead release
After notifying that No. 13 test method(s)s carry out dissolution test based on the Japanese Environment Room, use Atomic Absorption Spectrometer
(Hitachi, Ltd. manufacture, Z-2000) measures the lead concentration in dissolution fluid.
It follows that for various model fly ashs, use the phosphoric acid based compound as heavy metal fixative
(75% positive acid solution), carries out the fixing process of lead under the conditions shown in Table 8.Lead is fixed process and is passed through
Following method is carried out: in various flying dust samples, add pure water and the rule of 20 weight % relative to flying dust
Quantitative each heavy metal species fixative (phosphoric acid based compound, silica containing compound, iron content chemical combination
Thing) and be sufficiently stirred for spatula.Then, the basicity and the lead that measure the various samples after lead fixes process contain
Amount, and notify that No. 13 test method(s)s carry out dissolution test with the Japanese Environment Room, measure dissolution fluid pH and lead is molten
Go out concentration.Show the result in table 8.
[table 8]
As shown in Table 8, for embodiment 1 and 2, it can be seen that basicity reduces, the stripping quantity fall of lead therewith
Low.It addition, along with the reduction of basicity, for the stripping quantity of lead is reduced to fill the phosphorus of below reference value
Acid is that the adding rate of heavy metal fixative reduces.
Claims (6)
1. sour gas and a composite treating agent for heavy metal, it comprises: containing calcium hydroxide and hydrogen-oxygen
The double salt changing magnesium and constitute and basicity depressant.
Composite treating agent the most according to claim 1, wherein, the specific surface area of described double salt is
20m2/ more than g, median particle diameter d50 are less than 30 μm.
Composite treating agent the most according to claim 1 and 2, wherein, described basicity depressant is for being selected from
More than a kind compound in chloride, sulfate and hydroxide.
Composite treating agent the most according to claim 3, wherein, described compound comprises selected from sulphuric acid
Magnesium, the aluminium hydroxide of containing sulfate, zinc sulfate, copper sulfate, magnesium hydroxide, aluminium hydroxide, hydroxide
In ferrum, ferrous hydroxide, zinc hydroxide, Copper hydrate more than a kind.
5. according to the composite treating agent described in any one in Claims 1 to 4, wherein, described sour gas
Body is sour gas contained in waste gas, and described heavy metal is heavy metal contained in flying dust.
6. sour gas and a processing method for heavy metal, adds in the offgas containing calcium hydroxide and hydrogen
Magnesium oxide and after the double salt that constitutes, carry out flying dust dust, and the flying dust after dust add basicity fall
Low dose.
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| CN112108109A (en) * | 2020-09-29 | 2020-12-22 | 华中科技大学 | Preparation method of kaolin-based composite heavy metal additive and product thereof |
| CN112121755A (en) * | 2020-09-29 | 2020-12-25 | 华中科技大学 | Preparation method of alumina carrier calcium ferrite microcrystal heavy metal curing agent and product |
| CN112156750A (en) * | 2020-09-30 | 2021-01-01 | 华中科技大学 | Preparation method of fly ash carrier heavy metal adsorbent for pulverized coal and product thereof |
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| KR102604136B1 (en) | 2021-03-31 | 2023-11-17 | 가부시끼가이샤 리켄 | Side rail and oil control ring having it |
| CN114053997A (en) * | 2021-11-10 | 2022-02-18 | 安徽博硕科技有限公司 | Composite dioxin adsorbent and production process thereof |
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