JPH0966275A - Treatment of fly ash - Google Patents
Treatment of fly ashInfo
- Publication number
- JPH0966275A JPH0966275A JP7225007A JP22500795A JPH0966275A JP H0966275 A JPH0966275 A JP H0966275A JP 7225007 A JP7225007 A JP 7225007A JP 22500795 A JP22500795 A JP 22500795A JP H0966275 A JPH0966275 A JP H0966275A
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- heavy metal
- fixing agent
- metal fixing
- carbon
- 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
- 239000010881 fly ash Substances 0.000 title claims abstract description 71
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 238000004898 kneading Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000010828 elution Methods 0.000 abstract description 14
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 abstract description 10
- 229960002447 thiram Drugs 0.000 abstract description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 6
- 238000007865 diluting Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 239000008235 industrial water Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 2
- 239000000834 fixative Substances 0.000 description 20
- 239000000428 dust Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000295 fuel oil Substances 0.000 description 8
- 239000011550 stock solution Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000003085 diluting agent Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 229940094678 diasorb Drugs 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000007922 dissolution test Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PGYPOBZJRVSMDS-UHFFFAOYSA-N loperamide hydrochloride Chemical compound Cl.C=1C=CC=CC=1C(C=1C=CC=CC=1)(C(=O)N(C)C)CCN(CC1)CCC1(O)C1=CC=C(Cl)C=C1 PGYPOBZJRVSMDS-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010803 wood ash Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ごみなどの廃
棄物を焼却あるいは／及び溶融することによって、排ガ
スとともに排出される飛灰の処理法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating fly ash discharged together with exhaust gas by incinerating and / or melting waste such as municipal solid waste.
【０００２】[0002]
【従来の技術】従来、飛灰の処理法として、例えば、特
開平２−６８８９号公報には、飛灰に水と重金属固定剤
を添加して混練する方法が記載されている。2. Description of the Related Art Conventionally, as a method for treating fly ash, for example, JP-A-2-6889 describes a method in which water and a heavy metal fixing agent are added to fly ash and kneading.
【０００３】[0003]
【発明が解決しょうとする課題】しかし、上記公報に記
載されている方法では、重金属固定剤を添加することに
よって、飛灰からの重金属の溶出は防止できても、チウ
ラムの溶出や硫化ガスの発生を防止できないという問題
があった。本発明は、飛灰からの重金属の溶出を防止す
るとともに、チウラムの溶出及び硫化ガスの発生を防止
できる飛灰の処理法を提供することを目的とするもので
ある。However, in the method described in the above publication, by adding a heavy metal fixing agent, the elution of heavy metals from fly ash can be prevented, but the elution of thiuram and sulfide gas can be prevented. There was a problem that the occurrence could not be prevented. An object of the present invention is to provide a method for treating fly ash, which is capable of preventing the elution of heavy metals from fly ash, and at the same time preventing the elution of thiuram and the generation of sulfide gas.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、このよう
な課題を解決するために鋭意検討の結果、飛灰の処理を
するに際し、飛灰と粉末炭素と重金属固定剤とを混練す
ることによって、飛灰からの重金属の溶出を防止すると
ともに、チウラムの溶出及び硫化ガスの発生を防止する
ことができるという事実を見出し、本発明に到達した。
すなわち、本発明は、飛灰と粉末炭素及び重金属固定剤
とを混練して飛灰を処理することを特徴とする飛灰の処
理法を要旨とするものである。Means for Solving the Problems As a result of intensive studies to solve such problems, the present inventors knead fly ash, powder carbon and a heavy metal fixing agent when treating fly ash. Thus, the inventors have found the fact that it is possible to prevent the elution of heavy metals from fly ash, as well as the elution of thiuram and the generation of sulfide gas, and have reached the present invention.
That is, the gist of the present invention is a method for treating fly ash, which is characterized in that fly ash is kneaded with powdered carbon and a heavy metal fixing agent to treat fly ash.
【０００５】[0005]
【発明の実施の形態】以下、図面を参照しつつ、本発明
を具体的に説明する。図１は、本発明の飛灰の処理法の
一例を示す概略フロー図である。図１において、飛灰は
飛灰貯留サイロ１に導入された後、飛灰定量供給機２で
定量供給され、混練機３に導入される。混練機３には、
炭素貯留サイロ４に付設した炭素定量供給機５から定量
供給された粉末炭素と、用水貯槽６に付設した用水ポン
プ７から送液された工業用水と重金属固定剤貯槽８に付
設した重金属固定剤移送ポンプ９から移送された重金属
固定剤原液とが重金属固定剤希釈貯槽１０で混合希釈さ
れて付設の重金属固定剤注入ポンプ１１から送液された
重金属固定剤希釈液とが添加され、飛灰とともに混練さ
れる。混練された処理飛灰は、飛灰ピット１２に貯留さ
れる。このとき、飛灰に粉末炭素と重金属固定剤とを添
加する添加順序としては、いずれを先に添加してもよい
が、粉末炭素を先に添加することが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic flow chart showing an example of a method for treating fly ash according to the present invention. In FIG. 1, the fly ash is introduced into the fly ash storage silo 1, and then is supplied in a fixed amount by a fly ash constant quantity feeder 2, and is introduced into a kneader 3. In the kneading machine 3,
Powdered carbon that is quantitatively supplied from the carbon constant quantity feeder 5 attached to the carbon storage silo 4, industrial water sent from the water pump 7 attached to the water storage tank 6 and heavy metal fixative transfer attached to the heavy metal fixative storage tank 8 The heavy metal fixative stock solution transferred from the pump 9 is mixed and diluted in the heavy metal fixative dilution storage tank 10 and the heavy metal fixative diluent supplied from the attached heavy metal fixative injection pump 11 is added and kneaded with fly ash. To be done. The kneaded treated fly ash is stored in the fly ash pit 12. At this time, the powder carbon and the heavy metal fixing agent may be added to fly ash in any order, but it is preferable to add the powder carbon first.
【０００６】本発明に用いられる粉末炭素としては、粒
径が０．１〜２００μｍ、好ましくは０．２〜１００μ
ｍであればいかなるものでもよく、例えば、粉末活性
炭、重油燃焼カーボン、石炭燃焼カーボン、木材燃焼カ
ーボンなどがあげられる。粉末活性炭としては、例え
ば、「キントールＦＹ」、「キントールＦＷ」（以上、
キャタラー工業社製）、「クラレコールＰＫ」、「クラ
レコールＰＷ」（以上、クラレケミカル社製）、「ダイ
ヤソーブＦ−１００」（三菱化成工業社製）、「太閤
Ｙ」、「太閤Ｗ」（以上、二村化学工業社製）、「白鷺
Ａ」、「白鷺Ｃ」（以上、武田薬品工業社製）など市販
の粉末活性炭のいずれを用いてもよい。The powdered carbon used in the present invention has a particle size of 0.1 to 200 μm, preferably 0.2 to 100 μm.
Any m may be used, and examples thereof include powdered activated carbon, heavy oil burning carbon, coal burning carbon, wood burning carbon and the like. Examples of the powdered activated carbon include "Quintol FY" and "Quintol FW" (above,
(Kataray Kogyo Co., Ltd.), “Kuraray Coal PK”, “Kuraray Coal PW” (above, Kuraray Chemical Co., Ltd.), “Diasorb F-100” (manufactured by Mitsubishi Kasei Co., Ltd.), “Taiko Y”, “Taiko W” ( As described above, any of the commercially available powdered activated carbons such as “Nimura Chemical Co., Ltd.”, “Shirasagi A”, “Shirasagi C” (above, Takeda Pharmaceutical Co., Ltd.) may be used.
【０００７】また、重油燃焼カーボンとしては、例え
ば、火力発電所などで重油単独、あるいは重油、アスフ
ァルトピッチ、高沸点副生油、オリノコタールなどの燃
料を二種以上燃焼させてボイラー内に堆積したボイラー
灰や、電気集塵器やバグフィルターなどの集塵器で捕集
した集塵灰などを用いることができる。さらに、石炭燃
焼カーボンとしては、例えば、石炭単独、あるいは二種
以上の石炭を燃焼させてボイラー内に堆積したボイラー
灰や、電気集塵器やバグフィルターなどの集塵器で捕集
した集塵灰などを用いることができる。また、木材燃焼
カーボンとして、例えば、木材単独、あるいは二種以上
の木材を燃焼させてボイラー内に堆積したボイラー灰
や、電気集塵器やバグフィルターなどの集塵器で捕集し
た集塵灰などを用いることができる。なお、粉末炭素の
添加量としては、飛灰の性状や重金属固定剤の種類、添
加量などによっても異なるが、通常、飛灰１ｋｇに対し
て、１０〜２００ｇ（乾量）を加えればよい。As the heavy oil burning carbon, for example, heavy oil is used alone in a thermal power plant, or two or more kinds of fuel such as heavy oil, asphalt pitch, high boiling by-product oil, orinocotal are burned and deposited in a boiler. Boiler ash or dust ash collected by a dust collector such as an electric dust collector or a bag filter can be used. Further, examples of the coal-burning carbon include, for example, coal singly, or boiler ash that is deposited in a boiler by burning two or more types of coal, and dust collected by a dust collector such as an electric dust collector or a bag filter. Ash or the like can be used. Further, as wood-burning carbon, for example, wood ash accumulated in the boiler by burning wood alone or two or more kinds of wood, and dust ash collected by dust collectors such as electric dust collectors and bag filters Etc. can be used. Although the amount of powdered carbon added varies depending on the properties of fly ash, the type of heavy metal fixing agent, the amount added, etc., usually 10 to 200 g (dry amount) may be added to 1 kg of fly ash.
【０００８】また、本発明に用いられる重金属固定剤と
しては、例えば、「ＵＭＬ−７２００」（ユニチカ社
製）、「Ａ−１００」（日本鋼管社製）、「ニューエポ
ルバ８００」（ミヨシ油脂社製）、「ＡＣ−２０Ｎ」
（住友化学工業社製）、「アルサイトＬ−１０１」（不
二サッシ社製）、「オリトールＳ−４０００」（オリエ
ンタル技研工業社製）、「ハイジオン」（日本曹達社
製）、水硫化ソーダなど硫黄元素を有するものであれ
ば、いずれを用いてもよい。The heavy metal fixing agent used in the present invention is, for example, "UML-7200" (manufactured by Unitika Ltd.), "A-100" (manufactured by Nippon Kokan Co., Ltd.), "New Epolba 800" (manufactured by Miyoshi Yushi-Seiyaku Co., Ltd.). ), "AC-20N"
(Sumitomo Chemical Co., Ltd.), "Alsight L-101" (manufactured by Fuji Sash Co., Ltd.), "Oritol S-4000" (manufactured by Oriental Giken Kogyo Co., Ltd.), "Heidion" (manufactured by Nippon Soda Co., Ltd.), sodium hydrosulfide. Any element having a sulfur element may be used.
【０００９】重金属固定剤の添加量としては、飛灰の性
状や硫酸バンドなどの補助薬剤添加の有無、種類などに
よっても異なるが、飛灰１ｋｇに対して、重金属固定剤
原液が１〜１００ｇとなるように加えればよい。なお、
重金属固定剤は、処理飛灰の含水率が約１５〜４５％程
度になるように、通常、１〜１００％の重金属固定剤希
釈液として用いることが好ましい。The amount of the heavy metal fixative added varies depending on the properties of the fly ash, the presence or absence of addition of an auxiliary agent such as a sulfuric acid band, and the type, but the heavy metal fixative stock solution is 1 to 100 g per 1 kg of fly ash. Add it so that In addition,
The heavy metal fixing agent is usually preferably used as a heavy metal fixing agent diluting solution of 1 to 100% so that the treated fly ash has a water content of about 15 to 45%.
【００１０】また、本発明に用いられる混練機として
は、バッチ式、連続式のいずれでもよいが、通常、連続
式のニーダやバイブロミキサータイプのものが用いられ
ることが多い。このとき、混練する時間としては、３０
秒〜３０分間程度が好ましい。なお、図１では、混練機
を１台使用しているが、補助薬剤を使用する場合などに
混練機を２台使用して行ってもよい。The kneading machine used in the present invention may be either a batch type or a continuous type, but in general, a continuous type kneader or vibro mixer type is often used. At this time, the time for kneading is 30
Seconds to 30 minutes are preferable. Although one kneader is used in FIG. 1, two kneaders may be used when an auxiliary drug is used.
【００１１】[0011]
【実施例】次に、本発明を実施例及び比較例によって具
体的に説明する。 実施例１〜２、比較例１ 飛灰貯留サイロ１に貯留された都市ごみ焼却施設におけ
る排ガス処理設備の電気集塵器で捕集した、Ｐｂが３
２．９ｍｇ／リットル溶出する飛灰を、スクリュータイ
プの飛灰定量供給機２で、連続式二軸ニーダタイプの混
練機３に１０００ｋｇ／ｈで定量供給した。混練機３に
は、炭素貯留サイロ４に付設したスクリュータイプの炭
素定量供給機５から３０ｋｇ／ｈ（３ｗｔ％／飛灰）で
定量供給された粉末活性炭「キントールＦＹ」（粒径１
００μｍ以下，キャタラー工業社製）と、重金属固定剤
注入ポンプ１１から３００リットル／ｈで送液された１
０％重金属固定剤希釈液（重金属固定剤原液３ｗｔ％／
飛灰＋用水２７ｗｔ％／飛灰）とを添加し、飛灰ととも
に混練した（実施例１）。このとき、重金属固定剤希釈
液としては、用水貯槽６に付設したダイヤフラム定量タ
イプの用水ポンプ７から４５ｍ3 ／ｈで送液された工業
用水と重金属固定剤「ＵＭＬー８１００」（ユニチカ社
製）原液が充填されている重金属固定剤貯槽８に付設し
たダイヤフラム定量タイプの重金属固定剤移送ポンプ９
から５ｍ3／ｈで移送された重金属固定剤原液とを重金
属固定剤希釈貯槽１０で混合希釈したものを用いた。そ
して、処理飛灰は、処理飛灰ピット１２に貯留された。Next, the present invention will be described specifically with reference to examples and comparative examples. Examples 1 and 2, Comparative Example 1 Pb of 3 collected by the electric dust collector of the exhaust gas treatment facility in the municipal waste incineration facility stored in the fly ash storage silo 1 is 3
The fly ash eluted at 2.9 mg / liter was quantitatively supplied at 1000 kg / h to the continuous twin-screw kneader type kneader 3 by the screw type fly ash constant amount feeder 2. The kneading machine 3 is a powder type activated carbon “Quintol FY” (particle size: 1) which is quantitatively supplied at 30 kg / h (3 wt% / fly ash) from a screw type carbon quantitative feeder 5 attached to the carbon storage silo 4.
(Less than 00 μm, manufactured by Cataler Industry Co., Ltd.) and a heavy metal fixative injection pump 11 at a rate of 300 l / h.
0% heavy metal fixative diluent (heavy metal fixative stock solution 3 wt% /
Fly ash + 27 wt% of water / fly ash) was added and kneaded together with the fly ash (Example 1). At this time, as the heavy metal fixing agent diluting liquid, industrial water sent at 45 m 3 / h from the diaphragm fixed amount type water pump 7 attached to the water storage tank 6 and the heavy metal fixing agent "UML-8100" (manufactured by Unitika Ltd.) Diaphragm fixed type heavy metal fixative transfer pump 9 attached to heavy metal fixative storage tank 8 filled with stock solution
The heavy metal fixative stock solution transferred at 5 m 3 / h from was mixed and diluted in the heavy metal fixative dilution storage tank 10 was used. Then, the treated fly ash was stored in the treated fly ash pit 12.
【００１２】また、粉末活性炭の代わりに、火力発電所
で重油、アスファルトピッチ、高沸点副生油を燃焼させ
て電気集塵器で捕集した重油燃焼カーボンを用いたこと
以外は、実施例１と同様の処理を行った（実施例２）。
さらに、比較のため、粉末活性炭や重油燃焼カーボンを
用いなかったこと以外は、実施例１と同様の処理を行っ
た（比較例１）。Further, in place of the powdered activated carbon, heavy oil-burning carbon collected by burning heavy oil, asphalt pitch, and high-boiling-point by-product oil in a thermal power plant and collecting them in an electric precipitator was used in Example 1 The same treatment as in (Example 2) was performed.
Further, for comparison, the same treatment as in Example 1 was performed except that powdered activated carbon or heavy oil burning carbon was not used (Comparative Example 1).
【００１３】実施例１〜２、比較例１で混練した処理飛
灰について、「産業廃棄物に含まれる金属等の検定方法
（昭和４８年２月１７日、環境庁告示第１３号）」に定
める溶出試験を行い、Ｐｂとチウラムの溶出濃度を測定
して「金属等を含む産業廃棄物に係わる判定基準を定め
る総理府令（平成６年１１月７日、総理府令第６１
号）」に定める埋立判定基準と比較するとともに、１０
％スラリー（処理飛灰１０ｇ＋水９０ｇ）のｐＨと処理
飛灰の含水率を測定した。Regarding the treated fly ash kneaded in Examples 1 and 2 and Comparative Example 1, the method for testing metals contained in industrial waste (February 17, 1973, Environmental Agency Notification No. 13) Perform the prescribed dissolution test and measure the dissolution concentrations of Pb and thiuram to determine "The decision of the Prime Minister's Ordinance (November 7, 1994, Prime Minister's Ordinance 61
No.) ”and 10
The pH of the 10% slurry (treated fly ash 10 g + water 90 g) and the water content of the treated fly ash were measured.
【００１４】また、処理前の飛灰を実験室に持ち帰り、
実施例１〜２及び比較例１と同条件で、処理時に発生す
るＨ2 Ｓ、ＣＳ2 、ＣＯＳの硫化ガス濃度を次のような
方法で測定した。まず、容量１リットルのテドラーバッ
グ（ガスサンプリング袋、以下、バッグと称する）に飛
灰５０ｇと粉末活性炭１．５ｇ（３ｗｔ％／飛灰、実施
例１）、飛灰５０ｇと重油燃焼カーボン１．５ｇ（３ｗ
ｔ％／飛灰、実施例２）、飛灰５０ｇのみ（比較例１）
をそれぞれ入れて、捕集口から注射筒で脱気したのち、
新たに３００ミリリットルの空気を封入し、バッグの外
側から手で１０分間混練した。Also, the fly ash before treatment was brought back to the laboratory,
Under the same conditions as in Examples 1 and 2 and Comparative Example 1, the sulfide gas concentrations of H 2 S, CS 2 and COS generated during processing were measured by the following method. First, 50 g of fly ash and 1.5 g of powdered activated carbon (3 wt% / fly ash, Example 1), 50 g of fly ash and 1.5 g of heavy oil burning carbon in a Tedlar bag (gas sampling bag, hereinafter referred to as bag) having a capacity of 1 liter. (3w
t% / fly ash, Example 2), only 50 g fly ash (Comparative Example 1)
After degassing with a syringe from each collection port,
300 ml of air was newly enclosed, and the mixture was kneaded by hand from the outside of the bag for 10 minutes.
【００１５】次に、１０％重金属固定剤「ＵＭＬ−８１
００」希釈液１５リットル（重金属固定剤原液３ｗｔ％
／飛灰＋用水２７ｗｔ％／飛灰）をシリンジで注入し、
バッグの外側から手で１０分間混練した。さらに、密閉
したバッグ内に発生したガスをシリンジで別のバッグに
移したのち、再びマイクロシリンジでサンプリングし、
ガスクロマトグラフに注入して、ＣＳ2 、ＣＯＳを測定
した。また、Ｈ2 Ｓは、ＣＯＳのピークとほとんど重な
るため、バッグの捕集口に北川式ガス検知器をセット
し、１００ミリリットルのガスをサンプリングして測定
した。上記の測定値は、飛灰５０ｇ・空気３００ミリリ
ットル当たりであり、飛灰１ｋｇ・空気１ｍ3 Ｎ当たり
に換算したものを発生ガス濃度とした。表１に、処理前
後のＰｂとチウラムの溶出濃度及び除去率、１０％スラ
リーのｐＨと処理飛灰の含水率及びＨ2 Ｓ、ＣＳ2 、Ｃ
ＯＳの発生ガス濃度及び除去率を示す。Next, 10% heavy metal fixing agent "UML-81"
00 "Diluent 15 liters (3 wt% heavy metal fixative stock solution)
/ Fly ash + water 27 wt% for water / fly ash)
It was kneaded by hand from the outside of the bag for 10 minutes. Furthermore, after transferring the gas generated in the sealed bag to another bag with a syringe, sampling with a microsyringe again,
It was injected into a gas chromatograph and CS 2 and COS were measured. Further, since H 2 S almost overlaps with the peak of COS, a Kitagawa gas detector was set at the collection port of the bag, and 100 ml of gas was sampled and measured. The above measured values were per 50 g of fly ash and 300 ml of air, and the converted gas concentration was 1 kg of fly ash and 1 m 3 N of air. Table 1 shows the elution concentrations and removal rates of Pb and thiuram before and after treatment, pH of 10% slurry, water content of treated fly ash, and H 2 S, CS 2 , C.
The generated gas concentration and the removal rate of OS are shown.
【００１６】なお、表中の実施例の除去率は、比較例１
の除去率を０％としたときの，比較例１に対する実施例
の除去率を示しており、次式により求めたものである。
ただし，定量下限以下の実施例の測定値（表中の＜のつ
いた値）は０として計算した。The removal rates of the examples in the table are those of Comparative Example 1.
The removal rate of the example with respect to the comparative example 1 is shown when the removal rate of is set to 0%, and is obtained by the following equation.
However, the measured values (values with <in the table) of the examples below the lower limit of quantification were calculated as 0.
【００１７】[0017]
【数１】 [Equation 1]
【００１８】[0018]
【表１】 [Table 1]
【００１９】表１より明らかなように、飛灰に粉末炭素
である粉末活性炭あるいは重油燃焼カーボンと重金属固
定剤を添加して混練した実施例１、２における両者の処
理飛灰は、Ｐｂとチウラムの溶出濃度が埋立判定基準を
十分にクリアーできた。また、Ｈ2 Ｓ、ＣＳ2 、ＣＯＳ
の発生ガス濃度も大幅に低減することができた。これに
対して、飛灰に重金属固定剤だけを添加した比較例１に
ついての処理飛灰は、実施例１、２と比べて、Ｐｂとチ
ウラムの溶出濃度、Ｈ2 Ｓ、ＣＳ2 、ＣＯＳの発生ガス
濃度のいずれについても劣っており、チウラム溶出濃度
は産業廃棄物の埋立判定基準をオーバーした。As is clear from Table 1, both fly ash treated in Examples 1 and 2 obtained by adding powdered activated carbon or heavy oil burning carbon which is powder carbon and a heavy metal fixing agent to fly ash were Pb and thiuram. The elution concentration of was able to clear the landfill criteria sufficiently. In addition, H 2 S, CS 2 , COS
The generated gas concentration of was also able to be reduced significantly. On the other hand, the treated fly ash for Comparative Example 1 in which only the heavy metal fixing agent was added to the fly ash, compared with Examples 1 and 2, the elution concentrations of Pb and thiuram, H 2 S, CS 2 , and COS. The generated gas concentrations were inferior, and the thiuram elution concentration exceeded the standard for landfill judgment of industrial waste.
【００２０】[0020]
【発明の効果】本発明によれば、飛灰からの重金属溶出
を防止するとともに、チウラムの溶出及びＨ2 Ｓ、ＣＳ
2 、ＣＯＳといった硫化ガスの発生を防止することが可
能となる。According to the present invention, the elution of heavy metals from fly ash can be prevented, and the elution of thiuram and H 2 S, CS can be prevented.
2. It becomes possible to prevent the generation of sulfide gas such as COS.
【図１】本発明の飛灰の処理法の一例を示す概略フロー
図である。FIG. 1 is a schematic flow chart showing an example of a method for treating fly ash according to the present invention.
１ 飛灰貯留サイロ ２ 飛灰定量供給機 ３ 混練機 ４ 炭素貯留サイロ ５ 炭素定量供給機 ６ 用水貯槽 ７ 用水ポンプ ８ 重金属固定剤貯槽 ９ 重金属固定剤移送ポンプ 10 重金属固定剤希釈貯槽 11 重金属固定剤注入ポンプ 12 処理飛灰ピット 1 Fly ash storage silo 2 Fly ash quantitative feeder 3 Kneader 4 Carbon storage silo 5 Carbon quantitative feeder 6 Water storage tank 7 Water pump 8 Heavy metal fixative storage tank 9 Heavy metal fixative transfer pump 10 Heavy metal fixative dilution storage tank 11 Heavy metal fixative Infusion pump 12 processing fly ash pit
Claims (1)
練して飛灰を処理することを特徴とする飛灰の処理法。1. A method for treating fly ash, which comprises treating the fly ash by kneading the fly ash with powdered carbon and a heavy metal fixing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22500795A JP3411134B2 (en) | 1995-09-01 | 1995-09-01 | Fly ash treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22500795A JP3411134B2 (en) | 1995-09-01 | 1995-09-01 | Fly ash treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0966275A true JPH0966275A (en) | 1997-03-11 |
| JP3411134B2 JP3411134B2 (en) | 2003-05-26 |
Family
ID=16822625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22500795A Expired - Fee Related JP3411134B2 (en) | 1995-09-01 | 1995-09-01 | Fly ash treatment |
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| Country | Link |
|---|---|
| JP (1) | JP3411134B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003117521A (en) * | 2001-10-17 | 2003-04-22 | Ebara Corp | Method for treating incineration flying ash |
| US6818135B2 (en) | 2001-08-03 | 2004-11-16 | Canadus Technologies Llc | Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
-
1995
- 1995-09-01 JP JP22500795A patent/JP3411134B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6818135B2 (en) | 2001-08-03 | 2004-11-16 | Canadus Technologies Llc | Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| US6843923B2 (en) | 2001-08-03 | 2005-01-18 | Canadus Technologies Llc | Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| US6855259B2 (en) | 2001-08-03 | 2005-02-15 | Canadus Technologies Llc | Process for reducing the passive layer from the surface of a metal |
| US7109366B2 (en) | 2001-08-03 | 2006-09-19 | Canadus Technologies Llc | Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| US7163634B2 (en) | 2001-08-03 | 2007-01-16 | Riva Morton, legal representative | Compositions for removing metal ions from aqueous process solutions and methods of use thereof |
| JP2003117521A (en) * | 2001-10-17 | 2003-04-22 | Ebara Corp | Method for treating incineration flying ash |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3411134B2 (en) | 2003-05-26 |
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