THERMAL DECOMPOSITION RECYCLING METHOD FOR WASTE PLASTIC

• Main Authors: KOJIMA KATSUTOSHI, YATSUGAYO KENICHI, SAGARA AKIHITO, HARADA TASUKU, MATSUEDA KEIJI
• Format: Patent
• Language: English; Japanese
• Published: 15.08.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; GENERAL PROCESSES OF COMPOUNDING; LUBRICANTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

To provide a method whereby, in coke oven operation of using a coke raw material with a high blending ratio of non-pulverized caking coal, a large amount of waste plastic is charged into a coke oven for thermal decomposition recycling.SOLUTION: The present invention provides a method where, after a coke raw material C with a blending ratio of non-pulverized caking coal of 30 mass% or more is charged into a coke oven chamber 11 of a coke oven 10, waste plastic P is charged into an oven top space 12 above the coke raw material C for thermal decomposition recycling, characterized in that, the waste plastic P, which has been made into granules, by prior molding, with a ratio of ones having a mesh size under 10 mm of 20 mass% or less and a specific surface of 500 mm/g or less, is charged into the coke raw material C, and then charged into the oven top space 12 after a lapse of at least one hour.SELECTED DRAWING: Figure 1 【課題】非微粘結炭の配合割合が高いコークス原料を使用するコークス炉操業において、多量の廃棄プラスチックをコークス炉に装入して熱分解リサイクルすることが可能な方法を提供する。【解決手段】非微粘結炭の配合割合が３０質量％以上のコークス原料Ｃをコークス炉１０の炭化室１１に装入した後、コークス原料Ｃ上の炉頂空間部１２に廃棄プラスチックＰを装入して熱分解リサイクルする方法であって、事前成型により、篩目１０ｍｍアンダーの比率が２０質量％以下かつ比表面積が５００ｍｍ２／ｇ以下の粒状物とされた廃棄プラスチックＰを、コークス原料Ｃ装入後、少なくとも１時間経過してから炉頂空間部１２に装入する。【選択図】図１