JP2956499B2 - Fly ash treatment method - Google Patents
Fly ash treatment methodInfo
- Publication number
- JP2956499B2 JP2956499B2 JP6302002A JP30200294A JP2956499B2 JP 2956499 B2 JP2956499 B2 JP 2956499B2 JP 6302002 A JP6302002 A JP 6302002A JP 30200294 A JP30200294 A JP 30200294A JP 2956499 B2 JP2956499 B2 JP 2956499B2
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- amount
- heavy metal
- fixing agent
- metal fixing
- 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.)
- Expired - Lifetime
Links
- 239000010881 fly ash Substances 0.000 title claims description 63
- 238000000034 method Methods 0.000 title claims description 27
- 239000003513 alkali Substances 0.000 claims description 26
- 229910001385 heavy metal Inorganic materials 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910019142 PO4 Inorganic materials 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 13
- 239000010452 phosphate Substances 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- 239000003002 pH adjusting agent Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 33
- 230000007935 neutral effect Effects 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 239000000706 filtrate Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000010828 elution Methods 0.000 description 6
- 238000004448 titration Methods 0.000 description 5
- 239000002440 industrial waste Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007922 dissolution test Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000000954 titration curve Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Processing Of Solid Wastes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は飛灰の処理方法に係り、
特に、消石灰分を含有しない飛灰、即ち中性飛灰につい
てその酸度を把握して、適正な薬剤処理を行うことを可
能とする飛灰の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating fly ash,
In particular, the present invention relates to a fly ash treatment method capable of grasping the acidity of fly ash that does not contain slaked lime, that is, neutral fly ash, and performing appropriate chemical treatment.
【０００２】[0002]
【従来の技術】飛灰（煤塵）は、作業環境を悪化させ作
業員の健康上の問題を引き起こす可能性があることか
ら、法律で指定された下記〜の廃棄物処理法に従っ
て処理することが義務付けられている。2. Description of the Related Art Fly ash (dust) may deteriorate the working environment and cause health problems for workers. Therefore, it is necessary to treat the waste ash according to the following waste treatment methods specified by law. Mandatory.
【０００３】 薬剤処理法 溶融固化法 セメント固化法 酸、その他の溶媒による安定化法 ところで、飛灰は、焼却方式、集塵方式、有害ガス除去
方式等により、その化学組成や性状は大きく異なり、例
えば、焼却炉排ガスの湿式処理装置から排出される中性
飛灰は、乾式処理装置から排出されるアルカリ飛灰とは
異なり、集塵機の前段階での消石灰添加が行われていな
いため、消石灰を含まず、通常、弱酸性を示す。しかし
て、中性飛灰の成分及び性状は、表１に示す如く、焼却
物の種類等によって大きく異なる。Chemical treatment method Melt solidification method Cement solidification method Stabilization method with acid and other solvents By the way, fly ash has a very different chemical composition and properties depending on the incineration method, dust collection method, harmful gas removal method, etc. For example, neutral fly ash discharged from a wet treatment device for incinerator exhaust gas, unlike alkali fly ash discharged from a dry treatment device, does not have slaked lime added at the previous stage of the dust collector, Not contained, usually showing weak acidity. As shown in Table 1, the components and properties of the neutral fly ash vary greatly depending on the type of incinerated material and the like.
【０００４】[0004]
【表１】 [Table 1]
【０００５】このような中性飛灰を処理する場合、飛灰
からの重金属等の溶出は、溶出液のｐＨに大きく関与す
る。When such neutral fly ash is treated, elution of heavy metals and the like from the fly ash greatly affects the pH of the eluate.
【０００６】従って、薬剤処理法によりこのような中性
飛灰を処理する場合においては、予め、飛灰の酸度を的
確かつ確実に把握して、この酸度に基いて重金属等の溶
出を防止するために添加する重金属固定化剤やｐＨ調整
剤の添加量を決定する必要がある。Therefore, when such neutral fly ash is treated by the chemical treatment method, the acidity of the fly ash is accurately and reliably grasped in advance, and elution of heavy metals and the like is prevented based on the acidity. Therefore, it is necessary to determine the amount of the heavy metal fixing agent and the pH adjuster to be added.
【０００７】従来、重金属固定化剤やｐＨ調整剤の必要
添加量を決めるには、飛灰をサンプリングし、机上にて
当該薬剤を加えて処理を施し、更に法律の定める方法
（環境庁告示１３号法）により溶出試験を行い、効果を
評価することにより必要量を決定する方法が一般に採用
されている。Conventionally, in order to determine the required amount of a heavy metal fixing agent or a pH adjusting agent, fly ash is sampled, the chemical is added on a desk, the treatment is performed, and a method specified by law (Notification 13 of the Environment Agency) A method is generally employed in which a necessary amount is determined by performing a dissolution test according to the above method and evaluating the effect.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の方法では、
評価に時間がかかるため、中性飛灰の酸度（酸性の程
度）の変動に迅速に対応できないといった問題があっ
た。また、飛灰の何らかの物性を指標として添加量を決
定するものではないため、飛灰の性状が変動するたび
に、上述した試験を繰り返さなければならず、操作が煩
雑で効率が悪かった。In the above conventional method,
Since the evaluation takes time, there is a problem that it is not possible to quickly respond to a change in the acidity (degree of acidity) of the neutral fly ash. Further, since the addition amount is not determined using any physical property of the fly ash as an index, the above-described test has to be repeated every time the properties of the fly ash change, and the operation is complicated and the efficiency is low.
【０００９】本発明は上記従来の問題点を解決し、中性
飛灰の酸度を簡便な操作で迅速かつ適確に把握し、リン
酸系重金属固定化剤による適正な薬剤処理を行うことを
可能とする飛灰の処理方法を提供することを目的とす
る。[0009] The present invention solves the above conventional problems, grasped quickly and accurately acidity neutral fly ash by a simple operation, phosphorus
It is an object of the present invention to provide a method for treating fly ash, which enables appropriate chemical treatment with an acid-based heavy metal fixing agent .
【００１０】[0010]
【課題を解決するための手段】請求項１の飛灰の処理方
法は、リン酸系重金属固定化剤により飛灰を処理する方
法において、飛灰を水に混合して得られた溶液のアルカ
リ消費量に基いて、リン酸系重金属固定化剤及び／又は
ｐＨ調整剤の添加量を決定することを特徴とする。The method for treating fly ash according to claim 1 is a method for treating fly ash with a phosphate-based heavy metal fixing agent.
In the method, based on the alkali consumption of a solution obtained by mixing fly ash with water , a phosphate-based heavy metal fixing agent and / or
The amount of the pH adjuster is determined .
【００１１】請求項２の飛灰の処理方法は、リン酸系重
金属固定化剤により飛灰を処理する方法において、飛灰
を水に混合して得られた溶液をアルカリ水溶液で滴定
し、ｐＨ９とするのに要したアルカリ水溶液量に基い
て、リン酸系重金属固定化剤及び／又はｐＨ調整剤の添
加量を決定することを特徴とする。 [0011] The method for treating fly ash according to claim 2 is characterized in that the phosphate ash
In the method of treating fly ash with a metal fixing agent,
Is mixed with water and the resulting solution is titrated with an aqueous alkaline solution
Based on the amount of the aqueous alkali solution required to reach pH 9.
Adding a phosphate-based heavy metal fixing agent and / or a pH adjuster
It is characterized in that the addition is determined.
【００１２】以下に本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【００１３】なお、本発明において、水と飛灰との混合
比は、固液比、即ち飛灰に対する水の重量比（以下「Ｌ
／Ｓ」と称する場合がある。）で示す。In the present invention, the mixing ratio of water and fly ash is a solid-liquid ratio, that is, a weight ratio of water to fly ash (hereinafter referred to as “L”).
/ S ". ).
【００１４】本発明においては、まず、測定対象とする
飛灰を水と混合し、得られた溶液について、アルカリ消
費量を測定する。In the present invention, first, fly ash to be measured is mixed with water, and an alkali consumption of the obtained solution is measured.
【００１５】本発明において、水と飛灰との混合比、即
ち、固液比（Ｌ／Ｓ）は、後述の実施例１の結果を示す
図１より明らかなように、測定されるアルカリ消費量と
ほぼ反比例する。通常の場合、固液比（Ｌ／Ｓ）は１０
〜１０００、特に１００程度とするのが操作上好まし
い。In the present invention, the mixing ratio of water and fly ash, that is, the solid-liquid ratio (L / S) is determined by the measured alkali consumption as apparent from FIG. It is almost inversely proportional to the amount. Usually, the solid-liquid ratio (L / S) is 10
It is operationally preferable to be about 1000, especially about 100.
【００１６】本発明において、水と飛灰との混合により
得られた混合液のアルカリ消費量は、液ｐＨを９にする
のに必要なアルカリ水溶液の消費量、即ち、水と飛灰と
の混合溶液をアルカリ水溶液で滴定したときに、ｐＨ９
とするのに要したアルカリ水溶液量（以下、「アルカリ
滴定量」と称す。）として測定することができる。即
ち、後掲の実施例２に示す固液比（Ｌ／Ｓ）＝１００に
おける１／５０Ｎ ＮａＯＨ滴定曲線から明らかなよう
に、混合液のｐＨはｐＨ７〜８で緩衝し、この緩衝幅が
長いほどアルカリ消費量が多くなっている。従って、ｐ
Ｈ９でのアルカリ消費量を測定することにより、各飛灰
の緩衝幅（アルカリ消費量）の相違が明確となることか
ら、飛灰の酸度も的確に求められる。このため、一般的
には、ｐＨ９とするのに必要なアルカリ消費量ないしア
ルカリ滴定量を測定値とする。In the present invention, the alkali consumption of the mixture obtained by mixing water and fly ash is the consumption of the alkaline aqueous solution required to make the solution pH 9 ;
PH of the mixed solution of pH 9
Amount of alkaline aqueous solution required for
It is referred to as “titration amount”. ) Can be measured. That is, as is apparent from the 1 / 50N NaOH titration curve at the solid-liquid ratio (L / S) = 100 shown in Example 2 below, the pH of the mixed solution is buffered at pH 7 to 8, and the buffer width is long. The higher the alkali consumption, the higher the consumption. Therefore, p
By measuring the alkali consumption in H9, the difference in the buffer width (alkali consumption) of each fly ash becomes clear, so that the acidity of the fly ash can also be accurately obtained. For this reason, in general, the amount of alkali consumption or the amount of alkali required to reach pH 9 is reduced.
Let the Lucari titer be the measured value.
【００１７】本発明におけるアルカリ消費量ないしアル
カリ滴定量の測定は、例えば、下記(i) 〜(iii) の手順
に従って実施される。In the present invention, the amount of alkali consumption or
The measurement of the potassium titer is performed, for example, according to the following procedures (i) to (iii).
【００１８】 (i) まず、飛灰を一定量サンプリングする。 (ii) この飛灰に対して、例えば、Ｌ／Ｓが１００とな
るように水（望ましくは純水又は蒸留水）を加え、よく
撹拌する。 (iii) 混合液を濾紙を用いて濾過するなどの方法により
懸濁物質を取り除き、濾液のアルカリ消費量を測定す
る。具体的には、濾液を５０ｍｌ分取し、ｐＨメーター
を入れて１／５０Ｎ ＮａＯＨ水溶液で滴定する。液ｐ
Ｈが９となるときの１／５０Ｎ ＮａＯＨ水溶液添加量
（ｍｌ）がアルカリ消費量ないしアルカリ滴定量であ
り、これが飛灰の酸度の指標となる。(I) First, a certain amount of fly ash is sampled. (ii) To this fly ash, for example, water (preferably pure water or distilled water) is added so that L / S becomes 100, and the mixture is stirred well. (iii) Suspended substances are removed by a method such as filtering the mixture using filter paper, and the alkali consumption of the filtrate is measured. Specifically, 50 ml of the filtrate is taken, a pH meter is inserted, and titration is performed with a 1 / 50N NaOH aqueous solution. Liquid p
The addition amount (ml) of the 1 / 50N NaOH aqueous solution when H becomes 9 is the alkali consumption or alkali titration , and this is an index of the acidity of fly ash.
【００１９】上記(i) 〜(iii) の一連の操作は通常２０
分以内で完了する。The above series of operations (i) to (iii) is usually performed
Complete within minutes.
【００２０】従って、飛灰の薬剤処理に当っては、予
め、飛灰中のアルカリ消費量ないしアルカリ滴定量とリ
ン酸系重金属固定化剤等の薬剤処理における薬剤の必要
添加量との関係（例えば後掲の図４）を求めておくこと
により、飛灰中のアルカリ消費量ないしアルカリ滴定量
の測定値から適確かつ速やかにリン酸系重金属固定化剤
やｐＨ調整剤等の薬剤の必要添加量を求めることができ
る。[0020] Accordingly, the hitting the drug treatment of fly ash, in advance, the alkali consumption or alkaline titer and re of fly ash
By determining the relationship with the required amount of the chemical in the chemical treatment of the acid-based heavy metal fixing agent or the like (for example, FIG. 4 described later), the alkali consumption or fly titration in fly ash is determined. From the measured values of the above, it is possible to accurately and promptly determine the required amount of a chemical agent such as a phosphate-based heavy metal fixing agent and a pH adjuster.
【００２１】[0021]
【作用】飛灰を水に所定の固液比以上の割合で混合して
得られる溶液のアルカリ消費量ないしアルカリ滴定量
は、飛灰の酸度に比例し、飛灰の酸度の指標となる。従
って、この結果に基いてリン酸系重金属固定化剤及び／
又はｐＨ調整剤の添加量を決定することにより、適正な
薬剤処理を行うことができる。 [Action] Fly ash is mixed with water at a ratio exceeding the specified solid-liquid ratio.
Alkaline consumption of the resulting solutionOr alkali titration
Is proportional to the acidity of fly ash and is an index of the acidity of fly ash.Obedience
Thus, based on this result, the phosphate-based heavy metal fixing agent and / or
Or, by determining the amount of the pH adjuster to be added,
Drug treatment can be performed.
【００２２】[0022]
【実施例】以下に実験例及び実施例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically with reference to experimental examples and examples.
【００２３】実験例１ 産業廃棄物由来の中性飛灰Ａ〜Ｆを、固液比（Ｌ／Ｓ）
＝１０〜１０００となるように水に加えて、約５分間ス
ターラー撹拌した。その後、 No.５Ｃの濾紙で自然濾過
した。この濾液５０ｍｌを分取し、ｐＨメーターを入れ
て１／５０ＮＮａＯＨ水溶液で滴定して、ｐＨを９．０
にするのに必要な１／５０Ｎ ＮａＯＨ水溶液量（ｍ
ｌ）を測定し、結果を図１に示した。[0023] The neutral fly ash A~F from Experiment Example 1 industrial waste, solid-liquid ratio (L / S)
= 10 to 1000, and stirred with a stirrer for about 5 minutes. Thereafter, the mixture was naturally filtered through a No. 5C filter paper. A 50 ml portion of the filtrate was taken, and a pH meter was put thereinto and titrated with a 1 / 50N NaOH aqueous solution to adjust the pH to 9.0.
Amount of 1 / 50N NaOH aqueous solution (m
1) was measured, and the results are shown in FIG.
【００２４】図１より、いずれの場合もＬ／Ｓと１／５
０Ｎ ＮａＯＨ水溶液量とはほぼ反比例し、その係数が
中性飛灰毎に異なることがわかる。FIG. 1 shows that in each case L / S and 1/5
It can be seen that the coefficient is almost inversely proportional to the amount of the 0N NaOH aqueous solution, and the coefficient differs for each neutral fly ash.
【００２５】実験例２ 産業廃棄物由来の中性飛灰Ｂ，Ｃ，Ｄについて、各々、
固液比（Ｌ／Ｓ）＝１００となる割合でスターラーで約
５分間、水と撹拌し、No. ５Ｃの濾液で自然濾過した。The neutral fly ash B from Experiment Example 2 Industrial waste, C, for D, respectively,
The mixture was stirred with water for about 5 minutes with a stirrer at a ratio where the solid-liquid ratio (L / S) = 100, and the mixture was naturally filtered with a No. 5C filtrate.
【００２６】この濾液５０ｍｌを分取してｐＨメーター
を入れ、１／５０Ｎ ＮａＯＨ水溶液で滴定し、結果を
図２に示した。A 50 ml portion of the filtrate was taken, a pH meter was placed therein, and the filtrate was titrated with a 1 / 50N NaOH aqueous solution. The results are shown in FIG.
【００２７】図２より、ｐＨ７〜８で緩衝に達し、その
幅が飛灰毎に異なることがわかる。From FIG. 2, it can be seen that the buffer reaches the buffer at pH 7 to 8, and the width differs for each fly ash.
【００２８】実験例３ 産業廃棄物由来の中性飛灰Ａ〜Ｇについて、各々、固液
比（Ｌ／Ｓ）＝１００となる割合でスターラーで約５分
間、水と撹拌し、No. ５Ｃの濾液で自然濾過した。[0028] For neutral fly ash A~G from Experiment Example 3 industrial waste, respectively, solid-liquid ratio (L / S) = 100 to become a stirrer at a rate of about 5 minutes, stirred with water, No. Natural filtration was performed using a 5C filtrate.
【００２９】この濾液５０ｍｌを分取してｐＨメーター
を入れ、１／５０Ｎ ＮａＯＨ水溶液で滴定し、結果を
図３に示した。A 50 ml portion of the filtrate was taken, a pH meter was placed therein, and the filtrate was titrated with a 1 / 50N NaOH aqueous solution. The results are shown in FIG.
【００３０】図３より、ｐＨ９にするための１／５０Ｎ
ＮａＯＨ水溶液の必要量が飛灰毎に異なることがわか
る。FIG. 3 shows that 1 / 50N for adjusting the pH to 9 was obtained.
It can be seen that the required amount of the NaOH aqueous solution differs for each fly ash.
【００３１】実施例１ 産業廃棄物由来の各種の中性飛灰に、ｐＨ調整剤として
Ｃａ（ＯＨ）2と、リン酸系の重金属固定薬剤アシュナ
イトＲ（登録商標・栗田工業（株）製）と、水２０重量
％（飛灰に対する重量％）とを添加し、充分混練した後
溶出試験（環境庁告示１３号試験）を行ない、鉛とカド
ミウムの溶出値を測定した。また、別に、各飛灰をｐＨ
９とするための１／５０Ｎ ＮａＯＨ水溶液必要量を固
液比（Ｌ／Ｓ）＝１００として実験例３と同様にして測
定し、鉛の溶出値が０．３ｍｇ／ｌ以下、カドミウムの
溶出値が０．１ｍｇ／ｌ以下となるＣａ（ＯＨ）2及び
アシュナイトＲ添加率と１／５０Ｎ ＮａＯＨ水溶液必
要量との関係を調べた。この結果を図４に示した。Example 1 Various neutral fly ash derived from industrial waste, Ca (OH) 2 as a pH adjuster, and a phosphate-based heavy metal fixing agent Ashnite R (registered trademark, manufactured by Kurita Kogyo Co., Ltd.) ) And 20% by weight of water (% by weight with respect to fly ash), and after sufficient kneading, an elution test (Test No. 13 notified by the Environment Agency) was performed to measure the elution values of lead and cadmium. Separately, separate fly ash
1/50 N NaOH solution necessary amount to solid-liquid ratio for the 9 (L / S) = measured in the same manner as in Experiment Example 3 as 100, elution value of lead 0.3 mg / l or less, the elution of cadmium The relationship between the addition ratio of Ca (OH) 2 and Ashnite R at which the value was 0.1 mg / l or less and the required amount of a 1 / 50N NaOH aqueous solution was examined. The result is shown in FIG.
【００３２】図４より明らかなように、飛灰のアルカリ
消費量ないしアルカリ滴定量とＣａ（ＯＨ）2及びアシ
ュナイトＲの添加率とは相関関係がある。従って、飛灰
のアルカリ消費量ないしアルカリ滴定量を測定すること
により、この測定値から予め作製した図４のような相関
図を用いてＣａ（ＯＨ）2及び／又はアシュナイトＲの
必要添加量を推定することができる。As is clear from FIG. 4, there is a correlation between the alkali consumption or the alkali titer of fly ash and the addition rates of Ca (OH) 2 and Ashnite R. Therefore, by measuring the alkali consumption or alkali titer of the fly ash, the required amount of Ca (OH) 2 and / or Ashnite R can be determined using a correlation diagram as shown in FIG. Can be estimated.
【００３３】[0033]
【発明の効果】以上詳述した通り、本発明の飛灰の処理
方法によれば、飛灰を水に混合して得られる溶液のアル
カリ消費量ないしアルカリ滴定量を測定するという極め
て簡便な操作により、飛灰の性状、即ち、酸度を迅速か
つ適確に求めることができ、この結果に基いて、飛灰の
薬剤処理におけるリン酸系重金属固定化剤やｐＨ調整剤
の添加量を速やかに決定することができ、飛灰の性状の
変動に迅速に対応した適正な薬剤処理を容易に行うこと
ができる。As described above in detail, according to the method for treating fly ash of the present invention, the alkali consumption or alkali titer of a solution obtained by mixing fly ash with water is measured. The properties of the fly ash, that is, the acidity, can be determined quickly and accurately by an extremely simple operation. Based on the results, the addition of a phosphate-based heavy metal fixing agent or a pH adjuster in the chemical treatment of the fly ash is possible. amounts can be determined quickly, can be easily performed quickly proper drug processing corresponding to variations in the properties of the fly ash.
【図１】実験例１の結果を示すグラフである。1 is a graph showing the results of Experiment Example 1.
【図２】実験例２の結果を示すグラフである。2 is a graph showing the results of Experiment Example 2.
【図３】実験例３の結果を示すグラフである。3 is a graph showing the results of Experiment Example 3.
【図４】実施例１の結果を示すグラフである。FIG. 4 is a graph showing the results of Example 1 .
───────────────────────────────────────────────────── フロントページの続き (72)発明者 内田 敏仁 東京都新宿区西新宿３丁目４番７号 栗 田工業株式会社内 (56)参考文献 特開 平１−262978（ＪＰ，Ａ) 特開 昭63−40726（ＪＰ，Ａ) 特開 昭61−5726（ＪＰ，Ａ) 特開 平８−57443（ＪＰ，Ａ) 特開 平８−101186（ＪＰ，Ａ) 特開 平７−155725（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01N 33/00 B09B 3/00 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toshihito Uchida 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Kurita Kogyo Co., Ltd. (56) References JP 1-262978 (JP, A) JP JP-A-63-40726 (JP, A) JP-A-61-5726 (JP, A) JP-A-8-57443 (JP, A) JP-A-8-101186 (JP, A) JP-A-7-155725 (JP) , A) (58) Fields investigated (Int. Cl. 6 , DB name) G01N 33/00 B09B 3/00
Claims (2)
理する方法において、飛灰を水に混合して得られた溶液
のアルカリ消費量に基いて、リン酸系重金属固定化剤及
び／又はｐＨ調整剤の添加量を決定することを特徴とす
る飛灰の処理方法。(1) Fly ash is treated with a phosphate-based heavy metal fixing agent.
In the method of processing, a phosphate-based heavy metal fixing agent and a phosphate-based heavy metal fixing agent are used based on the alkali consumption of a solution obtained by mixing fly ash with water.
And / or a method for treating fly ash, comprising determining the amount of a pH adjuster to be added .
理する方法において、飛灰を水に混合して得られた溶液Solution obtained by mixing fly ash with water
をアルカリ水溶液で滴定し、ｐＨ９とするのに要したアWas titrated with an aqueous alkali solution to adjust the pH required to pH 9.
ルカリ水溶液量に基いて、リン酸系重金属固定化剤及びBased on the amount of aqueous solution of lukari, phosphate-based heavy metal fixing agent and
／又はｐＨ調整剤の添加量を決定することを特徴とするAnd / or determining the amount of the pH adjuster to be added
飛灰の処理方法。Fly ash treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6302002A JP2956499B2 (en) | 1994-12-06 | 1994-12-06 | Fly ash treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6302002A JP2956499B2 (en) | 1994-12-06 | 1994-12-06 | Fly ash treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08160033A JPH08160033A (en) | 1996-06-21 |
| JP2956499B2 true JP2956499B2 (en) | 1999-10-04 |
Family
ID=17903707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6302002A Expired - Lifetime JP2956499B2 (en) | 1994-12-06 | 1994-12-06 | Fly ash treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2956499B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4821109B2 (en) * | 2004-11-08 | 2011-11-24 | 栗田工業株式会社 | Processing method for heavy metal-containing ash |
-
1994
- 1994-12-06 JP JP6302002A patent/JP2956499B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08160033A (en) | 1996-06-21 |
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