JP2018079444A - 飛灰の洗浄方法 - Google Patents
飛灰の洗浄方法 Download PDFInfo
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- JP2018079444A JP2018079444A JP2016224778A JP2016224778A JP2018079444A JP 2018079444 A JP2018079444 A JP 2018079444A JP 2016224778 A JP2016224778 A JP 2016224778A JP 2016224778 A JP2016224778 A JP 2016224778A JP 2018079444 A JP2018079444 A JP 2018079444A
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- 239000010881 fly ash Substances 0.000 title claims abstract description 155
- 238000004140 cleaning Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 267
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 238000002156 mixing Methods 0.000 claims abstract description 83
- 238000000926 separation method Methods 0.000 claims abstract description 56
- 238000001704 evaporation Methods 0.000 claims abstract description 40
- 230000008020 evaporation Effects 0.000 claims abstract description 40
- 238000005406 washing Methods 0.000 claims description 111
- 230000003472 neutralizing effect Effects 0.000 claims description 69
- 239000003795 chemical substances by application Substances 0.000 claims description 63
- 229910052783 alkali metal Inorganic materials 0.000 claims description 26
- 239000011259 mixed solution Substances 0.000 claims description 26
- 150000001340 alkali metals Chemical class 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 14
- 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 claims description 11
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- 150000003839 salts Chemical class 0.000 description 28
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 20
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- 150000001342 alkaline earth metals Chemical class 0.000 description 9
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- -1 alkali metal salts Chemical class 0.000 description 2
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- 150000002013 dioxins Chemical class 0.000 description 2
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- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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- 238000002309 gasification Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 235000017550 sodium carbonate Nutrition 0.000 description 1
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- 239000008399 tap water Substances 0.000 description 1
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- 239000003440 toxic substance Substances 0.000 description 1
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Images
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- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—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
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/306—Alkali metal compounds of potassium
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
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Abstract
Description
具体的には、出願人は、飛灰と洗浄水との混合液中の溶解性蒸発残留物が所定の濃度よりも低く保たれていれば、混合液中の溶存物質が析出せず、析出物が流路を塞ぐなどの不具合が生じ難いので、洗浄済み水を飛灰の洗浄に問題無く使用できることを確認した。
即ち、本発明に係る飛灰の洗浄方法は、アルカリ性の中和剤で中和処理済みの排ガスから捕集された飛灰と洗浄水とを混合する混合工程と、前記混合工程で得られた前記飛灰と前記洗浄水との混合液を固液分離して、脱水ケーキと洗浄済み水とを得る固液分離工程と、を備え、前記混合工程では、前記洗浄済み水を、少なくとも前記洗浄水の一部として、前記混合液中の溶解性蒸発残留物が少なくとも20%になるまで再利用する。
が採用され得る。焼却炉1から排出された排ガス中には、塩化水素(HCl)、硫黄酸化物(SOx)等の酸性ガスが含まれている。焼却炉1から排出された酸性の排ガスは、ボイラ2及びエコノマイザ3によって熱回収され、減温塔4へと送られる。
Y = 100・X/(100−A)
即ち、すすぎ工程では、乾燥した脱水ケーキ中の塩素濃度の目標値を定め、脱水ケーキの含水率から、すすぎ後の脱水ケーキに対してどの値まで塩素濃度を下げる必要があるかを算出し、脱水ケーキ中の塩素濃度が該値以下となるように、脱水ケーキをすすぐ。
Z = ((B−C)/B)・100
具体的には、出願人は、飛灰と洗浄水との混合液中の溶解性蒸発残留物が所定の濃度よりも低く保たれていれば、混合液中の溶存物質が析出せず、析出物が流路を塞ぐなどの不具合が生じ難いので、洗浄済み水を飛灰の洗浄に問題無く使用できることを確認した。
即ち、本発明に係る飛灰の洗浄方法は、アルカリ性の中和剤で中和処理済みの排ガスから捕集された飛灰と洗浄水とを混合する混合工程と、前記混合工程で得られた前記飛灰と前記洗浄水との混合液中の溶解性蒸発残留物濃度を入手する工程と、前記混合液を固液分離して、脱水ケーキと洗浄済み水とを得る固液分離工程と、を備え、前記混合工程では、前記洗浄済み水を、少なくとも前記洗浄水の一部として、前記混合液中の前記溶解性蒸発残留物が少なくとも20%になるまで再利用する。
具体的には、出願人は、飛灰と洗浄水との混合液中の溶解性蒸発残留物が所定の濃度よりも低く保たれていれば、混合液中の溶存物質が析出せず、析出物が流路を塞ぐなどの不具合が生じ難いので、洗浄済み水を飛灰の洗浄に問題無く使用できることを確認した。
即ち、本発明に係る飛灰の洗浄方法は、アルカリ性の中和剤で中和処理済みの排ガスから捕集された飛灰と洗浄水とを混合する混合工程と、前記混合工程で得られた前記飛灰と前記洗浄水との混合液中の溶解性蒸発残留物濃度を入手する工程と、前記混合液を固液分離して、脱水ケーキと洗浄済み水とを得る固液分離工程と、を備え、前記混合工程では、前記洗浄済み水(前記脱水ケーキを洗浄して得られた水を除く)を、少なくとも前記洗浄水の一部として、前記混合液中の前記溶解性蒸発残留物が少なくとも20%になるまで再利用する。
Claims (5)
- アルカリ性の中和剤で中和処理済みの排ガスから捕集された飛灰と洗浄水とを混合する混合工程と、前記混合工程で得られた前記飛灰と前記洗浄水との混合液を固液分離して、脱水ケーキと洗浄済み水とを得る固液分離工程と、を備え、前記混合工程では、前記洗浄済み水を、少なくとも前記洗浄水の一部として、前記混合液中の溶解性蒸発残留物が少なくとも20%になるまで再利用する飛灰の洗浄方法。
- 前記アルカリ性の中和剤として、アルカリ金属から成る中和剤を使用する、請求項1に記載の飛灰の洗浄方法。
- 前記アルカリ金属から成る中和剤として、ナトリウム系の中和剤を使用し、前記混合工程では、前記混合液中の溶解性蒸発残留物が20%以上、且つ35%以下となるように、前記洗浄済み水を、少なくとも前記洗浄水の一部として再利用する、請求項2に記載の飛灰の洗浄方法。
- 前記脱水ケーキをすすぐすすぎ工程を備える、請求項1〜3の何れか1項に記載の飛灰の洗浄方法。
- 前記混合工程では、前記すすぎ工程で前記脱水ケーキをすすいだすすぎ済み水を、少なくとも前記洗浄水の一部として再利用する、請求項4に記載の飛灰の洗浄方法。
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JP2016224778A JP6261706B1 (ja) | 2016-11-18 | 2016-11-18 | 飛灰の洗浄方法 |
MYPI2019002423A MY191965A (en) | 2016-11-18 | 2017-11-17 | Method for washing fly ash |
PCT/JP2017/041531 WO2018092894A1 (ja) | 2016-11-18 | 2017-11-17 | 飛灰の洗浄方法 |
GB1908032.4A GB2571048B (en) | 2016-11-18 | 2017-11-17 | Method for washing fly ash |
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JP2016224778A JP6261706B1 (ja) | 2016-11-18 | 2016-11-18 | 飛灰の洗浄方法 |
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JP2018079444A true JP2018079444A (ja) | 2018-05-24 |
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GB (1) | GB2571048B (ja) |
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CN115231753B (zh) * | 2022-07-25 | 2024-02-02 | 中冶赛迪技术研究中心有限公司 | 利用膜浓缩浓盐水处理烧结机头灰的方法 |
CN116037630B (zh) * | 2022-08-17 | 2024-06-28 | 中国矿业大学 | 一种二类煤基固废一类化并用于损毁土地修复的方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07323212A (ja) * | 1994-05-30 | 1995-12-12 | Tsuyako Nemoto | 廃棄物の焼却処理方法および装置 |
JP2004507351A (ja) * | 2000-09-01 | 2004-03-11 | テク − ワイズ アクティーゼルスカブ | 廃棄物焼却プラントからのボトムアッシュの処理方法 |
JP2007054801A (ja) * | 2005-08-26 | 2007-03-08 | Mitsui Eng & Shipbuild Co Ltd | 飛灰処理装置及び飛灰の処理方法 |
JP2007069066A (ja) * | 2005-09-05 | 2007-03-22 | Mitsui Eng & Shipbuild Co Ltd | 飛灰の処理方法 |
JP2008062180A (ja) * | 2006-09-07 | 2008-03-21 | Sanei Kk | 廃棄物の処理方法 |
JP2008264628A (ja) * | 2007-04-17 | 2008-11-06 | Mitsubishi Materials Corp | 溶融飛灰の処理方法 |
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JP2008062180A (ja) * | 2006-09-07 | 2008-03-21 | Sanei Kk | 廃棄物の処理方法 |
JP2008264628A (ja) * | 2007-04-17 | 2008-11-06 | Mitsubishi Materials Corp | 溶融飛灰の処理方法 |
JP2010137141A (ja) * | 2008-12-10 | 2010-06-24 | Mitsubishi Heavy Ind Ltd | 灰洗浄排水の処理方法及び処理システム |
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