JP6562452B2 - 石炭灰の選別方法 - Google Patents
石炭灰の選別方法 Download PDFInfo
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- JP6562452B2 JP6562452B2 JP2015111721A JP2015111721A JP6562452B2 JP 6562452 B2 JP6562452 B2 JP 6562452B2 JP 2015111721 A JP2015111721 A JP 2015111721A JP 2015111721 A JP2015111721 A JP 2015111721A JP 6562452 B2 JP6562452 B2 JP 6562452B2
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- coal ash
- density
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- amount
- coal
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- 239000010883 coal ash Substances 0.000 title claims description 164
- 238000000034 method Methods 0.000 title claims description 46
- 238000010828 elution Methods 0.000 claims description 57
- 229910052785 arsenic Inorganic materials 0.000 claims description 24
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 5
- 238000010187 selection method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 46
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 29
- 239000011737 fluorine Substances 0.000 description 29
- 229910052731 fluorine Inorganic materials 0.000 description 29
- 239000000126 substance Substances 0.000 description 29
- 238000012360 testing method Methods 0.000 description 15
- 230000007613 environmental effect Effects 0.000 description 12
- 239000002994 raw material Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 238000011084 recovery Methods 0.000 description 11
- 239000003440 toxic substance Substances 0.000 description 11
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 10
- 239000002956 ash Substances 0.000 description 9
- 231100000614 poison Toxicity 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 231100000167 toxic agent Toxicity 0.000 description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000011669 selenium Substances 0.000 description 3
- 229910052711 selenium Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 239000000383 hazardous chemical Substances 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
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- FZFYOUJTOSBFPQ-UHFFFAOYSA-M dipotassium;hydroxide Chemical compound [OH-].[K+].[K+] FZFYOUJTOSBFPQ-UHFFFAOYSA-M 0.000 description 1
- 238000007922 dissolution test Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction 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
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Description
含有量又は溶出量の石炭灰を選別することができる。
本発明の石炭灰の選別方法は、石炭灰の密度を測定し、当該密度が第1しきい値よりも小さい石炭灰を有害物質の含有量又は溶出量が所定量以下となる石炭灰であると選別することを特徴とする。
実施形態1では、石炭灰の密度に基づいて選別を行う選別方法について説明したが、石炭灰の中央粒径(メジアン;50%値)を併用して選別を行ってもよい。詳細は後述するが、中央粒径が第2しきい値よりも小さい石炭灰は、特にフッ素の含有量や溶出量が多いからである。
フッ素やヒ素の分別が密度により可能になる原理については以下のように考えられる。
石炭火力発電所の石炭灰22種類を本発明の選別方法の対象とした。なお、この石炭灰には有害物質の含有量や溶出量が大きい試料も一部含まれるが、本試料はプラント内でスポット的に少量採取した試料であり、現在販売されている石炭灰(貯蔵サイロで混合されている石炭灰)の性状を代表するものではない。
各試料について密度を測定した。密度の測定は、液相置換法(JIS−A−1202)により行った。また、各試料についてフッ素含有量を燃焼イオンクロマトグラフ法により測定した。これらの測定結果を図2に示す。
各試料についてフッ素の溶出量を測定した。溶出量の測定は、環境庁告示第46号に基づく溶出試験により行った。これらの測定結果を図3に示す。
各試料について粒径を測定した。粒径の測定は、レーザー粒度計を用いて測定した。図4は、レーザー粒度計を用いて得られた粒径の中央粒径(メジアン;50%値)と、試験例1のフッ素の含有量と、密度との関係を示す図である。横軸は密度[g/cm3]であり、縦軸は50%粒径(中央粒径)[μm]である。また、プロットされた数字は、各試料のフッ素含有量[mg/kg]を表し、座標上の試料の位置はフッ素含有量に対応した大きさの円の中心である。
各試料についてヒ素の含有量を測定した。ヒ素の含有量は、環境庁告示19号に定める測定方法により測定した。石炭灰の密度とヒ素の含有量を図5に示す。
各試料について六価クロムの溶出量を測定した。六価クロムの溶出量は、環境庁告示第46号に基づく溶出試験により行った。六価クロムの溶出量と密度の関係を図7に示す。
Claims (2)
- 石炭火力発電所の貯蔵サイロ内の石炭灰の密度を測定し、当該密度が第1しきい値よりも小さい石炭灰をヒ素の含有量又は溶出量が所定量以下となる石炭灰であると選別する石炭灰の選別方法。
- 請求項1に記載する石炭灰の選別方法において、
前記第1しきい値は2.2g/cm3以下の範囲である
ことを特徴とする石炭灰の選別方法。
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JP2015111721A JP6562452B2 (ja) | 2015-06-01 | 2015-06-01 | 石炭灰の選別方法 |
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JP2015111721A JP6562452B2 (ja) | 2015-06-01 | 2015-06-01 | 石炭灰の選別方法 |
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JP2016221472A JP2016221472A (ja) | 2016-12-28 |
JP6562452B2 true JP6562452B2 (ja) | 2019-08-21 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102088137B1 (ko) * | 2019-09-05 | 2020-03-11 | 변형완 | 연갈탄 선별 장치 및 방법 |
JP6795230B1 (ja) * | 2020-02-28 | 2020-12-02 | 福島エコクリート株式会社 | 石炭灰混合材料の品質管理方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3983465B2 (ja) * | 2000-10-03 | 2007-09-26 | 株式会社神戸製鋼所 | 人工軽量骨材の製造方法および製造設備 |
JP2002119820A (ja) * | 2000-10-12 | 2002-04-23 | Nkk Corp | 廃棄物焼却排ガスとダストの処理方法 |
JP2006035123A (ja) * | 2004-07-28 | 2006-02-09 | Hokkaido Electric Power Co Inc:The | フライアッシュ中の有害元素の溶出低減方法 |
JP5522652B2 (ja) * | 2009-07-06 | 2014-06-18 | 一般財団法人電力中央研究所 | 石炭灰性状の評価方法及び評価システム |
JP2012132692A (ja) * | 2010-12-20 | 2012-07-12 | Tokyo Electric Power Co Inc:The | フライアッシュの強熱減量に基づく選別方法 |
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