JP2004123883A5 - - Google Patents
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- JP2004123883A5 JP2004123883A5 JP2002289292A JP2002289292A JP2004123883A5 JP 2004123883 A5 JP2004123883 A5 JP 2004123883A5 JP 2002289292 A JP2002289292 A JP 2002289292A JP 2002289292 A JP2002289292 A JP 2002289292A JP 2004123883 A5 JP2004123883 A5 JP 2004123883A5
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- JP
- Japan
- Prior art keywords
- plastic waste
- heat treatment
- photocatalyst
- light irradiation
- treating plastic
- 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.)
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Description
【0004】
【発明が解決しようとする課題】
この発明の目的は、最終的な焼却処理をしてもダイオキシン等の性攪乱物質、酸性雨の原因物質、金属を腐食させる原因物質等を生成させることがないように、硫黄及び/又はハロゲンを含有するプラスチック廃棄物を処理するプラスチック廃棄処理方法及びその処理方法を実施するためのプラスチック廃棄処理装置を提供することにある。
[0004]
[Problems to be solved by the invention]
The object of the present invention is to prevent sulfur and / or halogen from being generated so as not to generate a sex-disrupting substance such as dioxin, a causative substance of acid rain, a causative substance which corrodes a metal even after final incineration treatment. and to provide a plastic waste processing apparatus for carrying out the waste plastic processing method and processing method for processing a plastic waste containing.
【0006】
【課題を解決するための手段】
前記課題を解決するための手段は、硫黄及び/又はハロゲンを含有するプラスチック廃棄物をアルカリ性溶液とともに250〜350℃に加熱処理する加熱処理工程と、この加熱処理工程で処理された処理混合物から抜き出した液状物を光触媒の存在下で光照射処理をする光照射工程とを有することを特徴とするプラスチック廃棄物の処理方法であり、
前記手段の一態様においては、前記プラスチック廃棄物が、医療機器に使用されるプラスチック製品であり、
前記手段の一態様においては、前記加熱処理工程が250〜350℃で短くとも30分加熱する処理であり、
前記手段の一態様においては、前記光触媒がアナターゼ型二酸化チタンであり、
前記手段の一態様においては、前記光照射工程は紫外線を50〜150μw/cm2の強度で短くとも30分照射する工程であり、
前記課題を解決するための他の手段は、硫黄及び/又はハロゲンを含有するプラスチック廃棄物をアルカリ性溶液とともに250〜350℃に加熱処理する加熱処理槽と、この加熱処理槽から抜き出された溶液を光触媒の存在下で光照射処理する光照射槽とを有することを特徴とするプラスチック廃棄物処理装置である。
[0006]
[Means for Solving the Problems]
The means for solving the above problems are a heat treatment step of heat treating plastic waste containing sulfur and / or halogen together with an alkaline solution to 250 to 350 ° C., and extraction from the treatment mixture treated in this heat treatment step And irradiating the liquid material with light in the presence of a photocatalyst.
In one aspect of the means, the plastic waste is a plastic product used in a medical device,
In one embodiment of the means, the heat treatment step is a treatment of heating at 250 to 350 ° C. for at least 30 minutes,
In one embodiment of the means, the photocatalyst is anatase titanium dioxide,
In one aspect of the above-mentioned means, the light irradiation step is a step of irradiating ultraviolet light at an intensity of 50 to 150 μw / cm 2 for at least 30 minutes,
Another means for solving the above problems is a heat treatment tank which heats plastic waste containing sulfur and / or halogen together with an alkaline solution to 250 to 350 ° C., and a solution extracted from the heat treatment tank And a light irradiation tank which performs light irradiation treatment in the presence of a photocatalyst.
この加熱処理槽に投入されるアルカリ性溶液としては、例えば苛性ソーダ、苛性カリ等の強アルカリを溶解する水溶液を挙げることができる。強アルカリの濃度としては、通常、水1リットル当たり40〜700g、好ましくは80〜500gである。アルカリ性溶液の濃度が前記上限値を超えると、反応時間が長くなるという不都合を生じることがあり、前記下限値を下回ると、分解されないプラスチック廃棄物がそのまま残留するという不都合を生じることがある。 As the alkaline solution put in the heat treatment vessel may include, for example, sodium hydroxide, an aqueous solution dissolving a strong alkali such as caustic potash. The concentration of the strong alkali is usually 40 to 700 g, preferably 80 to 500 g, per liter of water. When the concentration of the alkaline solution exceeds the upper limit, the reaction time may be increased, and when the concentration is less than the lower limit, the undegraded plastic waste may be left as it is.
分離された成分例えば硫酸塩は、肥料分野、ガラス製造分野、染色分野、パルプ製造分野等の各種の分野に有効利用されることができる。回収された光触媒は再利用される。アルカリも前記加熱処理工程に有効利用される。 The separated components such as sulfate can be effectively used in various fields such as fertilizer field, glass production field, dyeing field, pulp production field and the like. The recovered photocatalyst is recycled . Alkali is also effectively used in the heat treatment step.
この液状物を純水で1000倍に稀釈し、得られる稀釈液をイオンクロマト装置(7310−20型 日機装(株)製)により陰イオンを分析した。その結果、硫酸イオンが検出されずにフタル酸イオン35mgが検出された。
The liquid was diluted 1000 times with pure water, and the resulting diluted solution was analyzed for anions by an ion chromatography apparatus (Model 7310-20, manufactured by Nikkiso Co., Ltd.). As a result, full barrel ion 35mg is detected not detected sulfate ion.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002289292A JP3920752B2 (en) | 2002-10-01 | 2002-10-01 | Method and apparatus for processing plastic waste |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002289292A JP3920752B2 (en) | 2002-10-01 | 2002-10-01 | Method and apparatus for processing plastic waste |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004123883A JP2004123883A (en) | 2004-04-22 |
JP2004123883A5 true JP2004123883A5 (en) | 2005-04-21 |
JP3920752B2 JP3920752B2 (en) | 2007-05-30 |
Family
ID=32281507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002289292A Expired - Fee Related JP3920752B2 (en) | 2002-10-01 | 2002-10-01 | Method and apparatus for processing plastic waste |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3920752B2 (en) |
-
2002
- 2002-10-01 JP JP2002289292A patent/JP3920752B2/en not_active Expired - Fee Related
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