JP4023914B2 - Chloride production inhibitor and waste treatment method using the chloride production inhibitor - Google Patents
Chloride production inhibitor and waste treatment method using the chloride production inhibitor Download PDFInfo
- Publication number
- JP4023914B2 JP4023914B2 JP17818598A JP17818598A JP4023914B2 JP 4023914 B2 JP4023914 B2 JP 4023914B2 JP 17818598 A JP17818598 A JP 17818598A JP 17818598 A JP17818598 A JP 17818598A JP 4023914 B2 JP4023914 B2 JP 4023914B2
- Authority
- JP
- Japan
- Prior art keywords
- waste
- nickel plating
- dioxins
- electroless nickel
- production inhibitor
- 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 - Fee Related
Links
Description
【０００１】
【発明の属する技術分野】
本発明は例えばゴミ、産業廃棄物を焼却する際にダイオキシン類等の塩素化物の生成を抑制することのできる塩素化物生成抑制剤及び、該塩素化物生成抑制剤を用いた廃棄物処理方法に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
都市ゴミ、産業廃棄物等の焼却によって生じる排煙中には、ＳＯx 、ＮＯx 、ＨＣｌ、シアン等の種々の有害物質が含まれており、特にダイオキシン類等の塩素化物を含む排煙が大気中に排出されていることが近年、大きな社会問題となっている。
【０００３】
ダイオキシン類等の塩素化物（以下、単にダイオキシン類と呼ぶ。）は非常に安定な物質で水に溶けず、半永久的に毒性が消失しないことから、その強い毒性と相俟って環境汚染対策の重要化学物質とされている。ゴミ焼却場において廃棄物、特にプラスチック廃棄物を焼却処理した際に生じる可能性の高いダイオキシン類の濃度を低下させるためには、排煙に水酸化カルシウム水溶液を噴霧する方法が、ある程度は有効であると言われている。このため従来、排煙を、水酸化カルシウム又は水酸化カルシウムと活性炭と接触させた後、バグフィルターを通過させて排煙中からダイオキシン類を除去することが試みられている。
【０００４】
平成２年１２月に厚生省から出された焼却炉の運転に関するガイドラインでは、新設の焼却炉ではダスト集塵機の入口ガス温度を２００℃以下に下げ、出口ガス中のダイオキシン類濃度を、国際毒性等価換算濃度で０．５ｎｇ／Ｎｍ3 以下にすること、既設の焼却炉ではダスト集塵機の入口ガス温度を２５０〜２８０℃以下の極力低い温度となるように運転し、ダイオキシン類濃度を従来の１／１０以下にすることが要望されている。しかしながら、これらの方法では、ダイオキシン類の除去率は、バグフィルターの通過ガス温度を、実用上の最低温度である１５０℃まで低下させても、９９．５％以上のダイオキシン類除去率を常に確保することは困難であった。
【０００５】
焼却過程で発生するダイオキシン類は、完全燃焼しないで生成したダイオキシン類の前駆体等が集塵装置を通過する際の温度、触媒等の条件が、ダイオキシン類が生成し易い条件となると、前駆体等と排煙中の塩素ガス、塩化水素ガスとが反応してダイオキシン類が生成すると考えられている。そこで、上記した従来の方法に加え、焼却工程後の次工程にダイオキシン類の除去工程を設けたり、ダイオキシン類生成の原因物質となる塩素ガスや塩化水素ガスを除去するための薬剤を添加する方法等も提案されている。
【０００６】
焼却工程後に更に設けるダイオキシン類の除去工程としては、例えば活性炭等の吸着剤によってダイオキシン類を吸着除去する方法、五酸化バナジウム、酸化タングステン、チタニア等の酸化触媒を用いて生成したダイオキシン類を酸化分解する方法等が採用されている（特開平３−１２８４６４号公報、特開平２−３５９１４号公報等）。しかしながら、吸着剤を用いる方法で低濃度のダイオキシン類を吸着除去するためには、空間速度を低くしなければならず、このため装置が巨大なものとなり、しかも廃活性炭等の再生や廃棄処理の問題が生じる。また触媒を用いて酸化分解する方法では、触媒作用によりダイオキシン類の新たな生成が起こる可能性があるとともに、低温で処理した場合には排煙中に含まれる塩化水素、ＳＯx 、水銀ガス、有機塩素化合物が触媒毒となって、触媒の性能が長期間維持できないという問題があった。
【０００７】
一方、塩素ガス、塩化水素ガスを除去するための薬剤を添加する方法では、例えば水酸化カリウム、水酸化ナトリウム、炭酸カリウム、炭酸ナトリウム等のアルカリ化合物を添加し、ダイオキシン類の生成原因物質となる塩化水素ガス等を３００〜９００℃で中和処理して塩化カリウム、塩化ナトリウム等の塩にする方法（特開平３−２２４６１８号公報）等が提案されているが、塩素ガスや塩化水素ガスの除去効果は十分とはいえず、ダイオキシン類の濃度を国際毒性等価換算濃度で０．５ｎｇ／Ｎｍ3 以下に低減化することは困難であった。
【０００８】
更に焼却灰中にもダイオキシン類が残存することが問題となっており、焼却灰のような固体状廃棄物中に含まれるダイオキシン類を除去するために、従来はダイオキシン類を含む固体状廃棄物を、アミン系化合物の存在下に加熱処理する方法（特開平４−２４１８８０号公報）等が提案されている。しかしながら、この方法もダイオキシン類の濃度を国際毒性等価換算濃度で０．５ｎｇ／Ｎｍ3 以下に低減することは困難であった。
【０００９】
本発明は上記の点に鑑みなされたもので、例えばゴミ焼却場等において廃棄物を焼却処理する際に生じる排煙中等に含まれる塩素化物濃度を低減化することのできる塩素化物生成抑制剤及びこの塩素化物生成抑制剤を用いた廃棄物処理方法を提供することを目的とする。
【００１０】
【課題を解決するための手段】
即ち、本発明の塩素化物生成抑制剤は、亜リン酸類及び／又は次亜リン酸類を含有する無電解ニッケルメッキ老化液を主成分とすることを特徴とする。また本発明の廃棄物処理方法は、亜リン酸類及び／又は次亜リン酸類を含有する無電解ニッケルメッキ老化液を主成分とする塩素化物生成抑制剤の存在下に、廃棄物を焼却処理することを特徴とする。
【００１１】
本発明方法は、廃棄物の焼却処理時に発生した排ガスを、亜リン酸類及び／又は次亜リン酸類を含有する無電解ニッケルメッキ老化液を主成分とする塩素化物生成抑制剤と接触させる方法を包含する。また本発明方法は、廃棄物の焼却によって生成した飛灰に、亜リン酸類及び／又は次亜リン酸類を含有する無電解ニッケルメッキ老化液を主成分とする塩素化物生成抑制剤を添加する方法を包含する。
【００１２】
【発明の実施の形態】
本発明の塩素化物生成抑制剤の主成分である無電解ニッケルメッキ老化液とは、無電解ニッケルメッキ処理過程で必然的に生成する、メッキ機能が減退したメッキ液で、亜リン酸類及び／又は次亜リン酸類を含有しているものである。亜リン酸類としては、亜リン酸や、例えば亜リン酸ナトリウム、亜リン酸カリウム、亜リン酸カルシウム、亜リン酸マグネシウム、亜リン酸アンモニウム、亜リン酸水素ナトリウム、亜リン酸水素カリウム、亜リン酸水素カルシウム、亜リン酸マグネシウム等の亜リン酸塩が挙げられる。これら亜リン酸類は２種以上を混合して用いることができる。
【００１３】
また次亜リン酸類としては、次亜リン酸や、例えば、次亜リン酸ナトリウム、次亜リン酸カリウム、次亜リン酸カルシウム、次亜リン酸マグネシウム、次亜リン酸アンモニウム等の次亜リン酸塩が挙げられる。これら次亜リン酸類は２種以上を混合して用いることができる。
【００１４】
本発明において、無電解ニッケルメッキ老化液中には、上記亜リン酸類、次亜リン酸類の一方のみが含まれていても、両方が含まれていても良い。無電解ニッケルメッキ老化液は基本的には、上記亜リン酸類及び／又は次亜リン酸類の他に、ニッケルイオン、硫酸イオン、錯化剤イオン、ナトリウムイオン等のイオン類と、光沢剤、界面活性剤、安定剤及び被メッキ物から溶出した微量の金属イオンが含有される。これらの成分の濃度は常に一定ではないが、例えば、亜リン酸イオン１０〜５５ｇ／Ｌ、次亜リン酸イオン８０〜１６０ｇ／Ｌ、ニッケルイオン４〜７ｇ／Ｌ、硫酸イオン３０〜７５ｇ／Ｌ、錯化剤イオン３０〜５５ｇ／Ｌ、ナトリウムイオン４６〜１２０ｇ／Ｌ程度を含有し、ｐＨが３．５〜５．５程度のものである。尚、無電解ニッケルメッキ老化液は、脱ニッケル処理等を施して実質的にニッケルイオンを含有していないものであっても良い。
【００１５】
本発明の塩素化物生成抑制剤は、上記無電解ニッケルメッキ老化液のみから構成されていても良いが、更にアルカリ化合物、還元剤、アミド化合物を含有していても良い。アルカリ化合物としては、例えば水酸化カリウム、水酸化ナトリウム、炭酸カリウム、炭酸水素カリウム、炭酸ナトリウム、炭酸水素ナトリウム等が挙げられる。また還元剤としては、例えば亜硫酸、金属水素化物類、金属水素錯化合物、ボラン、ヒドラジン、アルカリ金属アルコール錯体、アルカリ金属等が挙げられる。更にアミド化合物としては、スルファミン酸、カリウムアミド、ナトリウムアミド等が挙げられる。これらの添加量は、０．０１〜４０重量％程度が好ましい。
【００１６】
本発明の廃棄物処理方法は、上記本発明の塩素化物生成抑制剤を用いた処理方法であり、そのひとつは、本発明塩素化物生成抑制剤の存在下に廃棄物を焼却処理する方法である。本発明塩素化物生成抑制剤は、廃棄物を焼却する際に焼却炉に添加しても良く、廃棄物の焼却によって生じた排煙に添加しても良いが、排煙に添加する場合、１８０〜７００℃、好ましくは２５０〜６５０℃の温度下で添加することが好ましい。１８０℃未満の温度で添加しても、実質的に塩素化物が発生しないため実用的でなく、また７００℃を超える温度下では、亜リン酸類や次亜リン酸類と、ＳＯx とが反応して生成した硫酸塩が溶融し、焼却炉の配管内に付着して配管を腐食させる虞れがある。
【００１７】
本発明方法は、焼却する廃棄物が、焼却によってダイオキシン類が生成し易いプラスチック廃棄物の場合でも、有効に適用できる。更に本発明の塩素化物生成抑制剤は、廃棄物の焼却によって生じた焼却灰のように、ダイオキシン類等を含有する固体状廃棄物の処理に利用することもできる。
【００１８】
塩素化物生成抑制剤は、粉末の状態で添加しても、水溶液の状態でスプレー等の方法で添加しても良い。
【００１９】
塩素化物生成抑制剤の添加量は、廃棄物を焼却する際の焼却炉中に添加する場合、ゴミ１ｍ3 当たりに対し、固形分換算で０．２〜２０ｇが好ましく、排煙に添加する場合、排煙１ｍ3 当たりに対し固形分換算で０．１〜１０ｇ、特に０．１〜５ｇが好ましい。また焼却灰等の固体状廃棄物に添加する場合は０．２〜５０重量％が好ましい。
【００２０】
本発明方法において、廃棄物を焼却処理する際には、通常の焼却装置を用いることができる。
【００２１】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。
実施例１〜４、比較例１
ゴミ焼却装置でゴミを焼却して発生した排煙（排煙量２０，０００ｍ3 ／ｈ wet) を排出する排煙冷却装置の前で、表２に示す無電解ニッケルメッキ老化液を排煙に添加し（比較例は添加せず）、バグフィルター出口において排煙中に含まれるダイオキシン類の濃度（等価換算毒性）を測定した。使用した無電解ニッケルメッキ老化液の組成は、表１に示す通りである。添加した無電解ニッケルメッキ老化液の種類、添加時の温度、測定された排煙中のダイオキシン類濃度を表２に示す。また、無電解ニッケルメッキ老化液を添加後の排煙中に含まれる煤塵をバグフィルターで集塵し、この煤塵中からの金属（鉛）溶出濃度を環境庁告示１３号試験法に準じて測定した。結果を表２にあわせて示す。
尚、表１に示す電解ニッケルメッキ老化液の成分組成は、重量％である。
【００２２】
【表１】
【表２】
実施例５〜８、比較例２
家庭ゴミに、表３に示す無電解ニッケルメッキ老化液を添加混合した後（比較例２は無電解ニッケルメッキ老化液を添加せず）、ゴミ焼却装置によって焼却し、生成した排煙中のダイオキシン類の濃度（等価換算毒性）を測定した。結果を表３に示す。
【００２５】
【表３】
実施例９〜１２、比較例３
プラスチック廃棄物を焼却して生じた飛灰に、表４に示す無電解ニッケルメッキ老化液を添加して混練した後（比較例２は無電解ニッケルメッキ老化液を添加せず）、飛灰中に残留するダイオキシン類の濃度（等価換算毒性）を測定した。結果を表４に示す。
【００２７】
【表４】
【発明の効果】
以上説明したように本発明の塩素化物生成抑制剤によれば、廃棄物を焼却処理する際に生じるダイオキシン類の濃度を低減化することができ、廃棄物の焼却過程において生じたダイオキシン類を活性炭等の吸着剤によって吸着除去する方法のように、廃吸着剤処理のための特別な設備や工程が不要であり、低コストで効率良く排煙中の塩素化物濃度の低減化に貢献できる等の効果がある。また、本発明の塩素化物生成抑制剤を煤塵等の固体状廃棄物の処理に利用した場合、固体状廃棄物中に含まれるダイオキシン類を確実に除去することができる等の効果を有する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chlorinated product inhibitor capable of suppressing the formation of chlorinated products such as dioxins when incineration of garbage and industrial waste, and a waste treatment method using the chlorinated product inhibitor.
[0002]
[Prior art and problems to be solved by the invention]
The flue gas generated by incineration of municipal waste, industrial waste, etc. contains various harmful substances such as SOx, NOx, HCl, cyanide, and especially flue gas containing chlorinated substances such as dioxins In recent years, it has become a major social problem.
[0003]
Chlorinated substances such as dioxins (hereinafter simply referred to as dioxins) are very stable substances that do not dissolve in water and do not permanently lose their toxicity. It is considered an important chemical substance. In order to reduce the concentration of dioxins that are highly likely to occur when incineration of waste, especially plastic waste, in a garbage incineration plant, spraying a calcium hydroxide aqueous solution to the flue gas is effective to some extent. It is said that there is. For this reason, conventionally, after making flue gas contact with calcium hydroxide or calcium hydroxide and activated carbon, it has been attempted to remove dioxins from the flue gas through a bag filter.
[0004]
According to the guidelines on the operation of incinerators issued by the Ministry of Health and Welfare in December 1990, in the newly installed incinerator, the dust collector inlet gas temperature is lowered to 200 ° C or lower, and the dioxin concentration in the outlet gas is converted to the equivalent international toxicity equivalent. The concentration is set to 0.5 ng / Nm 3 or less, and the existing incinerator is operated so that the inlet gas temperature of the dust collector is as low as 250 to 280 ° C., and the dioxin concentration is reduced to 1/10 of the conventional one. The following is required. However, with these methods, the removal rate of dioxins is always 99.5% or more even when the gas temperature passing through the bag filter is lowered to 150 ° C, which is the lowest practical temperature. It was difficult to do.
[0005]
Dioxins generated in the incineration process are precursors when conditions such as the temperature and catalyst when dioxin precursors generated without complete combustion pass through the dust collector are conditions where dioxins are likely to be generated. It is thought that dioxins are generated by the reaction of the chlorine gas and the hydrogen chloride gas in the flue gas. Therefore, in addition to the above-described conventional methods, a method for removing dioxins in the next step after the incineration step or adding a chemical agent for removing chlorine gas or hydrogen chloride gas that causes dioxins generation Etc. are also proposed.
[0006]
The dioxin removal process that is further provided after the incineration process includes, for example, a method of adsorbing and removing dioxins using an adsorbent such as activated carbon, and oxidizing and decomposing dioxins generated using an oxidation catalyst such as vanadium pentoxide, tungsten oxide, and titania. And the like are employed (Japanese Patent Laid-Open No. 3-128464, Japanese Patent Laid-Open No. 2-35914). However, in order to adsorb and remove low-concentration dioxins by a method using an adsorbent, the space velocity has to be lowered, which makes the device huge, and also recycles and discards waste activated carbon, etc. Problems arise. In addition, in the method of oxidative decomposition using a catalyst, dioxins may be newly generated due to catalytic action, and when treated at low temperatures, hydrogen chloride contained in flue gas, SOx, mercury gas, organic There was a problem that the performance of the catalyst could not be maintained for a long time because the chlorine compound became a catalyst poison.
[0007]
On the other hand, in the method of adding a chemical for removing chlorine gas and hydrogen chloride gas, for example, an alkali compound such as potassium hydroxide, sodium hydroxide, potassium carbonate, or sodium carbonate is added, which becomes a cause of generation of dioxins. A method of neutralizing hydrogen chloride gas or the like at 300 to 900 ° C. to form a salt such as potassium chloride or sodium chloride (JP-A-3-224618) has been proposed. The removal effect was not sufficient, and it was difficult to reduce the concentration of dioxins to 0.5 ng / Nm 3 or less in terms of equivalent international toxicity.
[0008]
Furthermore, it is a problem that dioxins remain in the incineration ash, and in order to remove the dioxins contained in the solid waste such as the incineration ash, conventionally, the solid waste containing dioxins is used. Has been proposed (Japanese Patent Application Laid-Open No. 4-241880) and the like. However, in this method as well, it was difficult to reduce the concentration of dioxins to 0.5 ng / Nm 3 or less as an international equivalent equivalent concentration.
[0009]
The present invention has been made in view of the above points, and, for example, a chlorinated product inhibitor capable of reducing the concentration of chlorinated products contained in flue gas generated when incineration processing waste in a garbage incineration plant and the like, and It aims at providing the waste disposal method using this chlorination production | generation inhibitor.
[0010]
[Means for Solving the Problems]
That is, the chlorinated product formation inhibitor of the present invention is characterized by comprising an electroless nickel plating aging solution containing phosphorous acid and / or hypophosphorous acid as a main component. Moreover, the waste treatment method of the present invention incinerates waste in the presence of a chlorinated product formation inhibitor mainly composed of an electroless nickel plating aging solution containing phosphorous acid and / or hypophosphorous acid. It is characterized by that.
[0011]
The method of the present invention is a method in which exhaust gas generated during incineration of waste is brought into contact with a chlorination product inhibitor mainly composed of an electroless nickel plating aging solution containing phosphorous acid and / or hypophosphorous acid. Include. Further, the method of the present invention is a method of adding a chlorination product inhibitor mainly composed of an electroless nickel plating aging solution containing phosphorous acid and / or hypophosphorous acid to fly ash generated by incineration of waste. Is included.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The electroless nickel plating aging solution, which is the main component of the chlorinated product formation inhibitor of the present invention, is a plating solution that is inevitably produced during the electroless nickel plating process and has a reduced plating function. Phosphorous acid and / or It contains hypophosphorous acid. Phosphorous acids include phosphorous acid, for example, sodium phosphite, potassium phosphite, calcium phosphite, magnesium phosphite, ammonium phosphite, sodium hydrogen phosphite, potassium hydrogen phosphite, phosphorous acid Examples thereof include phosphites such as calcium hydrogen and magnesium phosphite. These phosphorous acids can be used as a mixture of two or more.
[0013]
Hypophosphorous acids include hypophosphorous acid and hypophosphites such as sodium hypophosphite, potassium hypophosphite, calcium hypophosphite, magnesium hypophosphite, ammonium hypophosphite, etc. Is mentioned. These hypophosphorous acids can be used in combination of two or more.
[0014]
In the present invention, the electroless nickel plating aging solution may contain only one or both of the above phosphorous acids and hypophosphorous acids. The electroless nickel plating aging solution is basically composed of ions such as nickel ion, sulfate ion, complexing agent ion, sodium ion, brightener, interface in addition to the above phosphorous acid and / or hypophosphorous acid. A trace amount of metal ions eluted from the activator, the stabilizer and the object to be plated are contained. The concentration of these components is not always constant. For example, phosphite ions 10 to 55 g / L, hypophosphite ions 80 to 160 g / L, nickel ions 4 to 7 g / L, sulfate ions 30 to 75 g / L , Containing complexing agent ions 30 to 55 g / L, sodium ions 46 to 120 g / L, and having a pH of about 3.5 to 5.5. The electroless nickel plating aging solution may be one that has been subjected to nickel removal treatment and the like and substantially does not contain nickel ions .
[0015]
The chlorinated product formation inhibitor of the present invention may be composed only of the electroless nickel plating aging solution, but may further contain an alkali compound, a reducing agent, and an amide compound. Examples of the alkali compound include potassium hydroxide, sodium hydroxide, potassium carbonate, potassium hydrogen carbonate, sodium carbonate, sodium hydrogen carbonate and the like. Examples of the reducing agent include sulfurous acid, metal hydrides, metal hydrogen complex compounds, borane, hydrazine, alkali metal alcohol complexes, and alkali metals. Furthermore, examples of the amide compound include sulfamic acid, potassium amide, sodium amide and the like. These addition amounts are preferably about 0.01 to 40% by weight.
[0016]
The waste treatment method of the present invention is a treatment method using the chlorinated product formation inhibitor of the present invention, one of which is a method of incinerating waste in the presence of the chlorinated product formation inhibitor of the present invention. . The chlorinated product formation inhibitor of the present invention may be added to an incinerator when incinerating waste, or may be added to flue gas generated by incineration of waste. It is preferable to add at a temperature of ˜700 ° C., preferably 250 to 650 ° C. Even if it is added at a temperature of less than 180 ° C., it is not practical because chlorinated substances are not substantially generated, and phosphorous acid or hypophosphorous acid reacts with SOx at temperatures exceeding 700 ° C. There is a possibility that the generated sulfate melts and adheres to the piping of the incinerator and corrodes the piping.
[0017]
The method of the present invention can be effectively applied even when the waste to be incinerated is plastic waste in which dioxins are easily generated by incineration. Furthermore, the chlorination production | generation inhibitor of this invention can also be utilized for the process of the solid waste containing dioxins etc. like the incineration ash produced by the incineration of waste.
[0018]
The chlorinated product inhibitor may be added in the form of a powder or may be added by a method such as spraying in the form of an aqueous solution.
[0019]
When added to the incinerator when incinerating waste, the addition amount of the chlorinated product formation inhibitor is preferably 0.2 to 20 g in terms of solid content per 1 m 3 of garbage, and added to flue gas In addition, 0.1 to 10 g, particularly 0.1 to 5 g is preferable in terms of solid content with respect to 1 m 3 of flue gas. Moreover, when adding to solid wastes, such as incineration ash, 0.2 to 50 weight% is preferable.
[0020]
In the method of the present invention, when the waste is incinerated, a normal incinerator can be used.
[0021]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
Examples 1-4, Comparative Example 1
In front of the flue gas cooler that discharges the flue gas generated by incineration of the garbage in the garbage incinerator (exhaust amount of 20,000 m 3 / h wet), the electroless nickel plating aging solution shown in Table 2 is exhausted. It was added (the comparative example was not added), and the concentration (equivalent equivalent toxicity) of dioxins contained in the flue gas was measured at the bag filter outlet. The composition of the electroless nickel plating aging solution used is as shown in Table 1. Table 2 shows the type of electroless nickel plating aging solution added, the temperature at the time of addition, and the measured dioxin concentration in the flue gas. In addition, dust contained in the flue gas after the addition of electroless nickel plating aging solution is collected with a bag filter, and the metal (lead) elution concentration from the dust is measured according to the Environmental Agency Notification No. 13 test method. did. The results are shown in Table 2.
The component composition of the electrolytic nickel plating aging solution shown in Table 1 is% by weight.
[0022]
[Table 1]
[Table 2]
Examples 5-8, Comparative Example 2
After adding and mixing the electroless nickel plating aging solution shown in Table 3 to household waste (Comparative Example 2 does not add electroless nickel plating aging solution), it is incinerated with a garbage incinerator and the dioxins in the generated flue gas Concentration (equivalent equivalent toxicity) was measured. The results are shown in Table 3.
[0025]
[Table 3]
Examples 9-12, Comparative Example 3
After adding and kneading the electroless nickel plating aging solution shown in Table 4 to fly ash generated by incineration of plastic waste (Comparative Example 2 does not add electroless nickel plating aging solution), The concentration of dioxins remaining in the solution (equivalent equivalent toxicity) was measured. The results are shown in Table 4.
[0027]
[Table 4]
【The invention's effect】
As described above, according to the chlorinated product formation inhibitor of the present invention, the concentration of dioxins generated when incinerating waste can be reduced, and dioxins generated in the incineration process of waste are activated carbon. No special equipment or process for waste adsorbent treatment is required, unlike the method of adsorbing and removing with an adsorbent such as, which can contribute to reducing the concentration of chlorinated substances in flue gas efficiently at low cost. effective. Moreover, when the chlorination production | generation inhibitor of this invention is utilized for processing of solid wastes, such as a dust, it has an effect that dioxins contained in solid waste can be removed reliably.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17818598A JP4023914B2 (en) | 1998-06-10 | 1998-06-10 | Chloride production inhibitor and waste treatment method using the chloride production inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17818598A JP4023914B2 (en) | 1998-06-10 | 1998-06-10 | Chloride production inhibitor and waste treatment method using the chloride production inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11349919A JPH11349919A (en) | 1999-12-21 |
| JP4023914B2 true JP4023914B2 (en) | 2007-12-19 |
Family
ID=16044094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17818598A Expired - Fee Related JP4023914B2 (en) | 1998-06-10 | 1998-06-10 | Chloride production inhibitor and waste treatment method using the chloride production inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4023914B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002102650A (en) * | 2000-09-27 | 2002-04-09 | Miyoshi Oil & Fat Co Ltd | Pretreatment method for flue gas |
| JP6161309B2 (en) * | 2013-02-05 | 2017-07-12 | 株式会社タクマ | Exhaust gas treatment apparatus and treatment method using the same |
| JP6417149B2 (en) * | 2014-08-18 | 2018-10-31 | 株式会社タクマ | Exhaust gas treatment apparatus and treatment method using the same |
| CN112648627B (en) * | 2020-12-26 | 2022-07-12 | 浙江大学 | Method for efficiently inhibiting generation of dioxin in waste incineration process by using phosphorus-based inhibitor |
-
1998
- 1998-06-10 JP JP17818598A patent/JP4023914B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11349919A (en) | 1999-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2561571B2 (en) | Method of removing mercury in exhaust gas | |
| JP4944946B2 (en) | Method and apparatus for reducing nitrogen oxides and organic compounds in an incineration plant | |
| JP4023914B2 (en) | Chloride production inhibitor and waste treatment method using the chloride production inhibitor | |
| JP4562128B2 (en) | Waste disposal method | |
| EP1016446B1 (en) | Method of making flue gas harmless | |
| JP3397089B2 (en) | Prevention method of dioxins release | |
| JP3985915B2 (en) | Method for suppressing the formation of chlorinated substances in the waste incineration process | |
| JP2000061252A (en) | Combustion exhaust gas treating agent and treatment | |
| JP3749363B2 (en) | How to eliminate smoke | |
| JP3782971B2 (en) | Method for reducing the content of polychlorinated dibenzodioxins and -furans in waste gases of chemical high temperature treatment | |
| JPH07171541A (en) | Agent and process for fixing heavy metal contained in waste | |
| JP3843551B2 (en) | Determination method of required amount of liquid chelating agent for fly ash treatment | |
| JP3969372B2 (en) | Organochlorine compound decomposition accelerator and decomposition method | |
| JP4107056B2 (en) | Method and agent for decomposing halogenated organic compounds | |
| JP2000176244A (en) | Treatment of incinerator waste gas | |
| JP3287298B2 (en) | Decomposition method of dioxins | |
| JP2003053140A (en) | Treating agent and treating method for combustion exhaust gas | |
| JP2001149888A (en) | Detoxifying treatment method of incineration ash | |
| JP3669270B2 (en) | Dioxins production inhibitor and production prevention method | |
| JP4103736B2 (en) | Organochlorine compound decomposition accelerator and decomposition method | |
| JP2001145862A (en) | Method for detoxifying incineration ash | |
| JP3988624B2 (en) | Fixing agent for mercury-containing ash | |
| JP2002102650A (en) | Pretreatment method for flue gas | |
| JP3753959B2 (en) | Combustion exhaust gas treatment equipment | |
| CN114602303A (en) | Application of soluble thiocyanate in emission reduction control of dioxin in solid waste incineration flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050419 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070720 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070801 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070829 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070926 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20071002 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101012 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101012 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121012 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131012 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |