JP5032784B2 - 塩化ナトリウムの製造システム - Google Patents
塩化ナトリウムの製造システム Download PDFInfo
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- JP5032784B2 JP5032784B2 JP2006097945A JP2006097945A JP5032784B2 JP 5032784 B2 JP5032784 B2 JP 5032784B2 JP 2006097945 A JP2006097945 A JP 2006097945A JP 2006097945 A JP2006097945 A JP 2006097945A JP 5032784 B2 JP5032784 B2 JP 5032784B2
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- sodium chloride
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims description 106
- 239000011780 sodium chloride Substances 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000012452 mother liquor Substances 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 32
- 238000002425 crystallisation Methods 0.000 claims description 22
- 230000008025 crystallization Effects 0.000 claims description 22
- 238000001556 precipitation Methods 0.000 claims description 22
- 238000005273 aeration Methods 0.000 claims description 20
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 18
- 229910052740 iodine Inorganic materials 0.000 claims description 15
- 239000011630 iodine Substances 0.000 claims description 15
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 14
- 150000002222 fluorine compounds Chemical class 0.000 claims description 13
- 229910001385 heavy metal Inorganic materials 0.000 claims description 13
- 238000006114 decarboxylation reaction Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 9
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 9
- 239000006228 supernatant Substances 0.000 claims description 9
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 19
- 239000007789 gas Substances 0.000 description 18
- 239000000243 solution Substances 0.000 description 18
- 150000003839 salts Chemical class 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 9
- 239000011575 calcium Substances 0.000 description 9
- 229910052791 calcium Inorganic materials 0.000 description 9
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 7
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 239000013522 chelant Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052979 sodium sulfide Inorganic materials 0.000 description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- -1 iodine ions Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000011775 sodium fluoride Substances 0.000 description 2
- 235000013024 sodium fluoride Nutrition 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Description
次に、脱炭酸槽4において炭酸根が除去された脱炭酸液は、反応槽5に送液され、そこでNaOHが適宜供給されて、例えば、pH7に調整される。この反応槽5には、硫酸根及びフッ素化合物を沈澱除去するためのカルシウム薬剤として、塩化カルシウム(CaCl2)が添加される一方、重金属類を沈澱除去するための硫化物として、硫化ナトリウム(Na2S)が、それぞれ添加される。これにより、硫酸根(例えば、硫酸ナトリウム)とフッ素化合物(例えば、フッ化ナトリウム:NaF)は、塩化カルシウムと反応し、それぞれ硫酸カルシウム(CaSO4)、フッ化カルシウム(CaF2)が生成するとともに、塩化ナトリウムが生じる(式2,式3)。また、重金属類(例えば、Zn,Cd,Hg、Pb)は、硫化ナトリウムと反応し、それぞれ重金属硫化物を形成する。
2NaF+CaCl2 → 2NaCl+CaF↓(式3)
続いて、硫酸根等が処理された脱炭酸液は、沈澱槽6へ送液され、PAC(ポリ塩化アルミニウム)及び高分子凝集剤が添加される。これにより、脱炭酸液から、硫酸カルシウム、フッ化カルシウム、重金属硫化物が凝集分離され、これらの凝集物は汚泥として沈澱槽6の外部へ排出される。
2 溶解槽
3 貯留槽
4 脱炭酸槽
5 反応槽
6 沈澱槽
7 ろ過装置
8 活性炭塔
9 塩水受槽
10 晶析槽
11 遠心分離機
12 母液受槽
13 曝気塔
14 送液手段
Claims (4)
- 燃焼排ガス中に重曹を添加して生成される生成物を水に溶解させ、該溶解液を精製して塩化ナトリウムを製造する塩化ナトリウムの製造システムにおいて、
前記溶解液中の炭酸根をpH8未満で分解して除去する脱炭酸槽と、該脱炭酸槽によって前記炭酸根が除去された前記溶解液中に残留する硫酸根と重金属とを沈澱除去する沈澱除去手段と、該沈澱除去手段によって前記硫酸根と前記重金属とを沈澱除去して得られた上澄液を加熱濃縮して前記塩化ナトリウムを晶析させる晶析槽とを備え、
前記沈澱除去手段による前記溶解液の沈澱除去操作及び前記晶析槽による前記上澄液の晶析操作をpH8未満で行うことを特徴とする塩化ナトリウムの製造システム。 - 前記沈澱除去手段は、前記脱炭酸槽によって前記炭酸根が除去された前記溶解液中に残留するフッ素化合物を沈澱除去することを特徴とする請求項1に記載の塩化ナトリウムの製造システム。
- 前記晶析槽によって晶析された前記塩化ナトリウムを分離して得られた母液を再びシステム内へ戻して循環させる送液手段を備えてなる請求項1又は2に記載の塩化ナトリウムの製造システム。
- 前記送液手段によって戻される前記母液の一部を曝気して該母液中のヨウ素を曝気除去し、該曝気された前記母液を前記脱炭酸槽へ供給する曝気手段を設けたことを特徴とする請求項3に記載の塩化ナトリウムの製造システム。
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JP5264591B2 (ja) * | 2009-03-27 | 2013-08-14 | 三井造船株式会社 | 排ガス処理およびNa系化合物製造システム、および方法 |
JP4866448B2 (ja) * | 2009-07-16 | 2012-02-01 | 株式会社アストム | 無機塩含有廃液の処理方法および装置 |
CN110183025B (zh) * | 2019-06-28 | 2023-09-26 | 中国科学院理化技术研究所 | 脱硫废水资源化处理方法及系统 |
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JPS6063329A (ja) * | 1983-09-16 | 1985-04-11 | Daido Steel Co Ltd | ダストの処理方法 |
FR2749006B1 (fr) * | 1996-05-24 | 1998-09-18 | Solvay | Procede pour la fabrication d'une solution aqueuse industrielle de chlorure de sodium |
JP2004359516A (ja) * | 2003-06-06 | 2004-12-24 | Asahi Glass Co Ltd | アルカリ金属塩化物、アルカリ金属水酸化物の製造方法 |
JP2006213535A (ja) * | 2005-02-01 | 2006-08-17 | Jfe Engineering Kk | 廃棄物をガス化溶融炉で処理する際に発生する塩水からの塩製造方法及び装置 |
JP4969872B2 (ja) * | 2006-02-28 | 2012-07-04 | 三井造船株式会社 | 塩化ナトリウムの製造システム |
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