201209080 六、發明說明： C 明戶斤屬々貝】 發明領域 本發明係有關於一種廢塑膠之熱分解處理裝置 C先前技術3 發明背景 近年來，用以形成循環型經濟社會之組合在各種領域 開始進行，而關於廢塑膠，其再循環之必要性也增高。廢 塑膠之再循環處理之一已知有從廢塑膠取出油之稱為油化 之處理。在此油化處理中，將廢塑膠投入裝備於熱分解處 理裝置之熱分解槽，藉從外側加熱熱分解槽，而將熱分解 槽内之廢塑膠加熱分解，生成熱分解氣體，且將其所生成 之熱为解氣體冷卻，而取得油。施行此種油化處理之廢塑 膠中，主要從醫療相關機關團體排出，分類成所謂之感染 J·療廢棄物者需於熱分解處理前，先進行滅菌處理。分類 成感染醫療廢棄物之廢塑膠以滅菌處理滅菌後，從滅菌處 理裝置移往熱分解槽，在熱分解層内加熱分解（參照專利文 獻1)。 先行技術文獻 專利文獻201209080 VI. Description of the invention: C. The present invention relates to a thermal decomposition treatment device for waste plastics. C Prior Art 3 Background of the Invention In recent years, a combination of recycling-type economic society has been established in various fields. Beginning, and with regard to waste plastics, the need for recycling is also increasing. One of the recycling processes of waste plastics is known as the treatment of oil removal from waste plastics. In this oiling treatment, the waste plastic is put into a thermal decomposition tank equipped with a thermal decomposition treatment device, and the waste plastic in the thermal decomposition tank is heated and decomposed by heating the thermal decomposition tank from the outside to generate a pyrolysis gas, and The generated heat is cooled by the degassing gas to obtain oil. The waste plastics that have been subjected to such oil treatment are mainly discharged from medical-related organizations and classified into so-called infections. J. Wastes must be sterilized before thermal decomposition. After the waste plastics classified as infected medical waste are sterilized and sterilized, they are transferred from the sterilization treatment device to the thermal decomposition tank and thermally decomposed in the thermal decomposition layer (see Patent Document 1). Advanced technical literature
專利文獻1曰本專利公報第4153923號 C 明内J 發明概要 發明欲解決之課題 201209080 在上述之油化處理中，由於熱分解槽之容量不足，故 為可儘量多將業經以滅菌裝置滅菌處理之廢塑膠投入熱分 解槽，乃於將廢塑膠移至熱分解槽前，以破碎裝置破碎， 之後，需要減少體積。又，將廢塑膠破碎時，一旦金屬混 入廢塑膠，便有破碎裝置因堵塞而停止運轉或故障之可能 性，故需事先將金屬從廢塑膠分離及去除。如此，在習知 之熱分解處理裝置中，由於需對處理對象之廢塑膠進行金 屬分離、破碎、及減少體積之前處理，故有油化處理全體 之處理時間增長之問題。 是故，本發明之課題係提供可縮短處理時間之熱分解 處理裝置。 用以欲解決課題之手段 本發明之熱分解處理裝置係為解決上述課題而發明 者，其係用以將廢塑膠熱分解之熱分解處理裝置，其包含 有收容廢塑膠之熱分解槽；設於前述熱分解槽内以將前述 熱分解槽内之廢塑膠加熱之加熱機構；及控制前述加熱機 構之加熱量以調整前述熱分解槽内溫度之控制機構。 由於本發明之熱分解處理裝置藉加熱機構設於熱分解 槽内，熱分解槽内之溫度上升速度較加熱機構設於熱分解 槽外之習知熱分解裝置快，故相較於習知之熱分解裝置， 可在不延長加熱時間下，擴大熱分解槽之容量。因此可將 廢塑膠直接以原形投入熱分解槽内，在熱分解槽内，可連 續地進行廢塑膠之滅菌處理及熱分解處理。如此，本發明 之熱分解處理裝置可省略金屬分離、破碎、及減少體積之 201209080 廢塑膠之前處理步驟及從滅菌處理裝置至熱分解處理裝置 之廢塑膠之移動步驟，故可縮短處理時間，而可刪減經費。 又，在上述熱分解處理裝置中，加熱機構宜為以通電 將自身加熱之過熱蒸氣供給管。此過熱蒸氣供給管係藉加 熱自身，使對内部供給之飽和蒸氣變化為過熱蒸氣，且將 此過熱蒸氣釋放至熱分解槽内。藉此過熱蒸氣及過熱蒸氣 供給管自身之熱，可以更良好之效率將熱分解槽内加熱。 又，上述熱分解處理裝置僅藉將過熱蒸氣供給管通 電，便可作為乾熱滅菌裝置使用。 又，上述熱分解處理裝置亦可於前述熱分解槽之外側 更包含有用以將過熱蒸氣冷卻之冷卻器。此冷卻器可將從 熱分解槽所排出之剩餘過熱蒸氣冷卻冷凝後，使之返回熱 分解槽内。根據此結構，可防止熱分解槽内因送入至熱分 解槽内之過熱蒸氣，而形成高壓。 又，上述熱分解處理裝置亦可包含有攪拌器，該攪拌 器係旋轉軸與熱分解槽之内側底面平行地延伸。藉以此攪 拌器攪拌熱分解槽内之廢塑膠，可使熱分解處理後之廢塑 膠、木片、紙屑等有機物之殘渣形成粉狀，並且，可以更 良好之效率將熱分解槽内加熱。 上述攪拌器構造成可將廢塑膠朝形成於熱分解槽之廢 塑膠之排出口搬運。根據此結構，可以良好效率將熱分解 槽内之熱分解後之廢塑膠排出至熱分解槽外。 又，在上述熱分解處理裝置中，控制機構控制加熱機 構之加熱量，俾使熱分解槽内之溫度可達到用以將廢塑膠 201209080 滅菌之第1溫度及用以將廢塑膠油化之第2溫度。 上述控制機構亦可進一步控制加熱機構之加熱量，俾 使熱分解槽内之溫度可達到用以將廢塑膠、及木片、紙屑 等有機物碳化之第3溫度。 發明效果 根據本發明，可縮短處理時間。 圖式簡單說明 第1圖係本實施形態之熱分解處理裝置之正面截面圖。 第2圖係本實施形態之熱分解處理裝置之平面圖。 第3圖係本實施形態之熱分解處理裝置之左側面圖。 第4圖係第1圖之A-A截面圖。 第5圖係本實施形態之熱分解處理裝置之右側面圖。 第6圖係本實施形態之冷卻器之正面放大圖。 第7圖係本實施形態之廢塑膠油化處理系統之全體概 略圖。 t實施方式3 用以實施發明之形態 以下，就本發明之熱分解處理裝置之一實施形態，一 面參照圖式，一面說明。 如第1圖所示，本實施形態之熱分解處理裝置1包含有 熱分解槽2、用以將過熱蒸氣導入至此熱分解槽2内之過熱 蒸氣供給管3、及用以將過熱蒸氣冷卻冷凝之冷卻器4(冷卻 機構）。 熱分解槽2為約長方體狀，並形成為内部可收容廢塑膠 201209080 之中空。如第2圖所示，於此熱分解槽2之上面設有為投入 廢塑膠而可開關之蓋部21、及用以將從廢塑膠產生之熱分 解氣體排出之排出管23，並於排出管23設有用以調節熱分 解氣體之流量之電動氣閘24 ^又，於熱分解槽2之上面設有 安全閥25、及用以對熱分解槽2内供給冷卻水之喷水之冷卻 喷水供給口 26。如第2圖及第3圖所示，於熱分解槽2之左側 面設有為取出於熱分解處理後生成之碳化物之所謂殘渣而 可開關之2個門部27(排出口），又，於熱分解槽2内形成有用 以 >主入冷卻用氮1氣之氣氣注入口28。如第1圖所示，於熱分 解槽2之下方設置有用以將熱分解槽2冷卻之送風機6。 如第4圖所示’於熱分解槽2設有用以於熱分解處理中 攪拌廢塑膠之2個攪拌器5。攪拌器5具有與熱分解槽2之底 面平行地延伸之旋轉軸51，此旋轉軸51於周圍安裝複數個 葉片53，而可藉馬達52於兩方向旋轉。攪拌器5構造成當旋 轉軸51藉馬達52於一方向旋轉時，便攪拌熱分解槽2内之廢 塑膠，而當旋轉轴51於反方向旋轉時，則將熱分解槽2内之 廢塑膠朝門部27側搬運。又，如第i圖及第4圖所示，於熱 分解槽2内設有用以測定熱分解槽2内之壓力之壓力計7、及 用以不使熱分解槽2内之熱漏掉之絕熱材8。 如第1圖及第4圖所示’過熱蒸氣供給管3設於熱分解槽 2内’且在熱分解槽2内之前側壁面及後側壁面配置成上下 折返。過熱热氣供給管3以藉通電加熱至最高9〇〇。〇之所謂 加熱管構成，使從後述電貫流式鍋爐3〇〇輸送，通過内部之 飽和蒸氣變化成200〜75代之過熱蒸氣。此過熱蒸氣供給管 201209080 3之加熱量可藉内藏定序器式操作盤9(控制機構）自動控 制。過熱蒸氣供給管3之材質以具有高溫下之耐腐蝕性者為 佳’可使用鎳鉻合金。鎳鉻合金雖非特別予以限定者，但 以含有鎳58〜63% ’含有鉻21〜25%者為佳，例如英高錦（註 冊商標)601。又，當熱分解槽2之容量為4.16m3時，過熱蒸 氣供給管3之大小雖非特別予以限定者，但以外徑 26.7mm、内徑21.3mm、長度15〜18m為佳，例如配管尺寸 15A。 如第5圖所示，於熱分解槽2之右側面安裝有4個冷卻器 4。如第6圖所示，冷卻管4具有為雙重管之冷卻管42，於此 冷卻管42設有用以對内管與外管間供給冷卻水之水供給口 421、及用以排出此冷卻水之水排出口 422。冷卻管42將熱 分解槽2内之過熱蒸氣藉由第1導管41a導入至内管，而以在 内管與外管間流動之冷卻水將此過熱蒸氣冷卻冷凝。之 後，冷卻管42使經冷卻冷凝而形成為水之過熱蒸氣藉由第2 導管，返回熱分解槽2内。於第1導管41 a設有用以停止從熱 分解槽2内排出過熱蒸氣之電磁閥43，於第2導管41b設有用 以防止冷凝後之過熱蒸氣之逆流之止回閥44 ° 如第7圖所示，如上述構成之熱分解處理裝置1配置於 廢塑膠油化處理系統100之最上游。於熱分解處理裝置1連 接有用以藉將貯藏於水槽200内之水導入至内部來加熱’而 使飽和蒸氣產生之電貫流式鍋爐300。於熱分解處理裝置1 之下游配置有用以以沸石觸媒等將熱分解氣體改質之觸媒 塔500，於此觸媒塔500與熱分解處理裝置1間設有利用氫氧 201209080 化妈液將熱分解氣體中和以去除熱分解氣體中之氣之洗條 器400。此外，在洗滌器4〇〇中，使用海波(硫代硫酸鈉）液作 為還原劑。於觸媒塔5〇〇之下游配置有用以將熱分解氣體冷 卻冷凝’生成油之冷凝裝置600。此冷凝裝置600具有2個冷 卻槽601 ’使業經以冷卻塔6〇2冷卻之冷卻水流至此2個冷卻 槽601之外側面。再者’於冷凝裝置6〇〇之下游配置有用以 將水從所生成之油分離之離心分離機7〇〇。業經以此離心分 離機分離水之油藉由第1FA過濾器801，貯藏於油槽8〇〇，從 油分離之水則藉由第2FA過濾器20卜貯藏於水槽2〇〇。又， 未以冷凝裝置600冷凝之所謂廢氣在廢氣洗淨槽9〇1以苛性 鈉液洗淨，暫時收容於廢氣槽902後，在廢氣淨化器903以 PIP鈦自然觸媒予以淨化。之後’廢氣在廢氣淨化裝置90〇， 以為光觸媒之氧化鈦光觸媒陶瓷過濾器殺菌，從排氣導管 904排放至大氣中。 接著’就如上述構成之熱分解處理裝置1、及設置有此 熱分解處理裝置1之廢塑膠油化處理系統1〇〇之作動方法作 說明。 首先，在關閉排出管23之電動氣閘24及冷卻器4之電磁 閥43之狀態下，開啟蓋部21，將為感染醫療廢棄物之廢塑 膠投入熱分解槽2内。之後，關閉蓋部21，將熱分解槽2内 密閉（參照第2圖）。 接著，以通電將過熱蒸氣供給管3加熱至最高9〇〇〇c， 以此過熱蒸氣供給管3自身之熱將熱分解槽2内加熱。在熱 分解槽2内之溫度超過18〇t：之時間點，過熱蒸氣供給管3之 201209080 加熱量以操作盤9之定序器自動控制成熱分解槽2内之溫度 不致再上升，而將熱分解槽2内之溫度以18(TC以上（第1溫 度）維持至少3 〇分鐘。藉此，可將為熱分解槽2内之感染醫 療廢棄物之廢塑膠乾熱滅菌。 接著，在一直關閉冷卻器4之電磁閥43之狀態下’開啟 電動氣閘24，開放排出管23後，使電貫流式鍋爐300作動， 藉由軟水器對此電貫流式鍋爐300内供給水槽200内之水。 藉此’在電貫流式鍋爐300内產生飽和蒸氣，此飽和蒸氣從 電貫流式鍋爐3〇〇輸送至過熱蒸氣供給管3。過熱蒸氣供給 管3以通電加熱至最高9〇(TC，藉此，在過熱蒸氣供給管3， 從電貫流式鍋爐300送至之飽和蒸氣變化成200〜750。(：之過 熱蒸氣。如此進行而產生之過熱蒸氣從過熱蒸氣供給管3釋 放至熱分解槽2内，熱分解槽2内藉此過熱蒸氣及過熱蒸氣 供給管3急速地加熱。此外，由於電磁閥43關閉，電動氣閘 24開啟，故熱分解槽2内之剩餘之過熱蒸氣不排出至冷卻器 4，而排出至排出管23。當熱分解槽2内之溫度上升時，熱 分解槽2内之廢塑膠開始炫融。此時，當使授拌器$之馬達 52驅動，使旋轉軸51以預定轉速旋轉時，攪拌器5便攪拌熱 分解槽2内之已熔融之廢塑膠（參照第4圖）。 如此，一面以攪拌器5攪拌熱分解槽2内之廢塑膠，一 面持續熱分解槽2内之加熱至熱分解槽2内之溫度達到 250〜500C(第2溫度）為止。過熱蒸氣供給管3之加熱量以操 作盤9之疋序器，自動控制成熱分解槽2内之溫度不超過第2 溫度。熱分解槽2内之溫度達到第2溫度後，藉將熱分解槽2 10 201209080 内維持在此第2溫度預定時間（較佳為120〜150分鐘），可從熱 分解槽2内之廢塑膠生成熱分解氣體。 如此進行而生成之熱分解氣體可從排出管23排出至熱 分解槽2外。如第7圖所示，此熱分解槽以洗滌器4〇〇去除 氣’藉接觸觸媒塔500内之觸媒，改質成低沸點之氣體。業 經改質之熱分解氣體供給至冷凝裝置600,通過冷凝裝置 600之冷卻槽601内，藉在冷卻槽601之外側面流動之冷卻水 予以冷卻冷凝。藉此，可從熱分解氣體生成油。在冷凝震 置600所生成之油輸送至離心分離機700，以此離心分離機 700分離水份。業經以離心分離機700分離水份之油通過第 1FA過濾器801，去除曱醛後’貯藏於油槽8〇〇。另一方面， 業經以離心分離機700從油分離之水份通過第2FA過濾器 201 ’去除甲駿後，返回至水槽200，再利用於飽和蒸氣之 生成。 在此，熱分解氣體中亦包含未以冷凝裝置600冷凝之成 份。因此，未在冷凝裝置600之冷卻槽601冷凝之廢氣送出 至廢氣洗淨槽901。廢氣以廢氣洗淨槽9〇1洗淨，暫時收容 於廢氣槽902後’對廢氣淨化器903供給而予以淨化、有機 分解。經淨化、有機分解之氣體之後在廢氣淨化裝置900中 殺菌，從排氣導管9〇4排出至大氣中。 如此進行油化處理後，在熱分解槽2内進行熱分解氣體 生成後之廢塑膠之碳化處理。加以詳述，在一直維持關閉 電磁閥43，開啟電動氣閘24之狀態下，藉以通電將過熱蒸 氣供給管3加熱至最高900°C ’而在過熱蒸氣供給管3内，使 201209080 500〜750°C之過熱蒸氣產生。將此過熱蒸氣從過熱蒸氣供给 管3導入至熱分解槽2内，以過熱蒸氣及過熱蒸氣供給營3使 熱分解槽2内之溫度上升至45〇〜65〇°C(第3溫度）。過熱赛氣 供給管3之加熱量以操作盤9之定序器，自動控制成熱分解 槽2内之溫度不超過第3溫度。當熱分解槽2内之溫度達到第 3溫度後，藉將熱分解槽2内維持在此第3溫度預定時間（較 佳為10〜20分鐘）’可在熱分解槽2内’生成稱為殘渣之碳化 物。此外，在碳化處理中也產生些微熱分解氣體，關於此 熱分解氣體，也以與前述油化處理相同之路線回收。 碳化處理後，藉停止電貫流式鍋爐300之作動，同時， 停止對過熱蒸氣供給管3之通電，而停止過熱蒸氣管3之力 熱，而使熱分解槽2自然冷卻。此外，亦可從冷卻喷水供終 口 26對熱分解槽2内供給冷卻喷水，將熱分解槽2内強制地 冷卻。又’亦可與冷卻喷水同時地從氮氣注入口28將氮氣 注入至熱分解槽2内’或以送風機6朝熱分解槽2送風。 冷卻熱分解槽2後，在一直關閉門部27之狀態下， 達52使揽拌器5之旋轉軸51以預定轉速於與油化處理中之 旋轉方向相反之方向旋轉。藉此，由於熱分解槽2内之殘渣 往門部27側搬運’而集中於門部27附近’故可易從門部 回收殘渣° 如以上’藉本實施形態之熱分解處理裝置丨對熱分解槽 2内供給過熱蒸氣，可以良好效率將熱分解槽2内加熱，故 可增大熱分解槽2之容量。因此，可將處理對象之廢塑膠直 接以原形大夏投入至熱分解槽2内，而可在熱分解样2内， 12 201209080 連續進行滅菌處理及熱分解處理。結果，可縮短油化處理 全體之處理時間，而可有效率地進行油化處理。又’本實 施形態之熱分解處理裝置1在熱分解處理槽2内，攪拌器5與 熱分解槽2之底面平行而設。即’由於攪拌器5之端部不致 突出至熱分解槽2之上面’故可增大用以在熱分解槽2之上 面投入廢塑膠之門部2。 以上，就本發明之實施形態作了說明，本發明不限於 該等，只要不脫離本發明之旨趣，可進行各種變更。舉例 言之，在上述實施形態中，過熱蒸氣供給管3在熱分解槽2， 配置於前側壁面及後側壁面’而只要設於熱分解槽2内，便 不限於此，可按投入於熱分解槽2内之廢塑膠之形狀等，設 於熱分解槽2内之左右壁面、頂面、底面、中央部。 又，在上述實施形態中’加熱機構為過熱蒸氣供給管 3，而只要設於熱分解槽2内’便不限於此，舉例言之，可 為電熱加熱器等，亦可併用過熱蒸氣供給管3與電熱加熱器 等。 又，在上述實施形態中，僅藉以通電將過熱蒸氣供給 管3加熱，進行滅菌處理，亦可藉過熱蒸氣供給管3之加熱 及藉由過熱蒸氣供給管3導入至熱分解槽2之過熱蒸氣，將 熱分解槽2内加熱。加以詳述，滅菌處理時，關閉排出管23 之電動氣閘24及冷卻器4之電磁閥43，將熱分解槽2密閉， 以通電將過熱蒸氣供給管3加熱至最高9〇〇。〇，同時，使電 貫流式鍋爐300作動。藉此，從電貫流式鍋爐3〇〇送往過熱 蒸氣供給管3之飽和蒸氣在過熱蒸氣供給管3，變化為 13 201209080 200〜75(TC，過熱蒸氣從過熱蒸氣供給管3釋放至熱分解槽2 内。藉此過熱蒸氣及過熱蒸氣供給管3自身之熱，將熱分解 槽2内加熱至180°C以上（第1溫度）為止，藉將熱分解槽2内維 持在第1溫度至少30分鐘，來進行廢塑膠之滅菌處理。 如此，併用過熱蒸氣供給管3自身之熱與過熱蒸氣，進 行滅菌處理時，宜使用冷卻器4。加以詳述，滅菌處理時， 藉關閉電動氣閘24，同時，開啟電磁閥43，而將熱分解槽2 内之剩餘之過熱蒸氣藉由第1導管41a，導入至冷卻管42之 内管。此過熱蒸氣在冷卻管42之内管，以在内管與外管間 流動之冷卻水予以冷卻冷凝，之後，藉由第2導管41b，返 回至熱分解槽2内（參照第6圖）。藉此，可防止熱分解槽2内 形成高壓。此外，亦可在熱分解槽2外，以氧化鈦等光觸媒 將業經以冷卻器4冷凝而形成為水之過熱蒸氣殺菌，以再利 用。又，亦可不使用冷卻器4，而將從熱分解槽2排出之剩 餘之過熱蒸氣焚燒。此時，過熱蒸氣宜於接觸外部空氣前 焚燒。 又，在上述實施形態中，熱分解處理裝置1進行了滅菌 處理及熱分解處理，但不限於此，亦可單獨作為滅菌裝置 來使用。 又，在上述實施形態中，熱分解槽2為略長方體，但不 限於此，可為圓柱狀、多角柱狀等各種形狀。 又，在上述實施形態中，攪拌器5呈具有複數個葉片53 之形狀，而只要可攪拌熱分解槽2内之廢塑膠，並不限於 此，可呈螺旋狀等各種形狀。 14 201209080 又，在上述實施形態中，熱分解處裝置1配置於第7圖 所示之廢塑膠油化處理系統100，但不限於此，可配置於各 種眾所皆知之廢塑膠油化處理系統。 【圖式簡單說明】 第1圖係本實施形態之熱分解處理裝置之正面截面圖。 第2圖係本實施形態之熱分解處理裝置之平面圖。 第3圖係本實施形態之熱分解處理裝置之左側面圖。 第4圖係第1圖之A-A截面圖。 第5圖係本實施形態之熱分解處理裝置之右側面圖。 第6圖係本實施形態之冷卻器之正面放大圖。 第7圖係本實施形態之廢塑膠油化處理系統之全體概 略圖。 【主要元件符號說明】 1...熱分解處理裝置 24...電動氣閘 2...熱分解槽 25...安全閥 3...過熱蒸氣供給管 26...冷卻喷水供給口 4...冷卻器(冷卻機構） 27...門部(排出口） 5...攪拌器 28…氮氣注入口 6...送風機 41a...第1導管 7.··壓力計 41b...第2導管 8...絕熱材 42...冷卻管 9…操作盤(控制機構） 43...電磁閥 21...蓋部 44...止回閥 23...排出管 51...旋轉軸 15 201209080 52...馬達 601...冷卻槽 53...葉片 602...冷卻塔 100...廢塑膠油化處理系統 700...離心分離機 200...水槽 800...油槽 201...第2FA過濾器 801...第1FA過濾器 300...電貫流式鍋爐 900...廢氣淨化裝置 400...洗滌器 901...廢氣洗淨槽 421...水供給口 902...廢氣槽 422...水排出口 903...廢氣淨化器 500.. .觸媒塔 600.. .冷凝裝置 904...排氣導管 16Patent Document 1 曰 Patent Publication No. 4153923 C. Inventive J Summary of Invention Invention to be Solved 201209080 In the above-described oiling treatment, since the capacity of the thermal decomposition tank is insufficient, it is possible to sterilize the sterilization apparatus as much as possible. The waste plastic is put into the thermal decomposition tank, and the waste plastic is moved to the thermal decomposition tank and broken by the crushing device, and then the volume needs to be reduced. Further, when the waste plastic is crushed, once the metal is mixed with the waste plastic, the crushing device may be stopped or malfunction due to clogging, so the metal must be separated and removed from the waste plastic in advance. As described above, in the conventional thermal decomposition processing apparatus, since the waste plastic to be processed is subjected to metal separation, crushing, and volume reduction treatment, the processing time of the entire oiling treatment is increased. Therefore, an object of the present invention is to provide a thermal decomposition processing apparatus which can shorten the processing time. Means for Solving the Problem The thermal decomposition treatment apparatus of the present invention is an inventor of the present invention, and is a thermal decomposition treatment apparatus for thermally decomposing waste plastics, which comprises a thermal decomposition tank for accommodating waste plastics; a heating mechanism for heating the waste plastic in the thermal decomposition tank in the thermal decomposition tank; and a control mechanism for controlling the heating amount of the heating mechanism to adjust the temperature in the thermal decomposition tank. Since the thermal decomposition treatment device of the present invention is disposed in the thermal decomposition tank by the heating mechanism, the temperature rise rate in the thermal decomposition tank is faster than the conventional thermal decomposition device in which the heating mechanism is disposed outside the thermal decomposition tank, so that compared with the conventional heat The decomposition device can expand the capacity of the thermal decomposition tank without prolonging the heating time. Therefore, the waste plastic can be directly put into the thermal decomposition tank in the original form, and the waste plastic can be continuously sterilized and thermally decomposed in the thermal decomposition tank. In this way, the thermal decomposition treatment device of the present invention can omit the metal separation, the crushing, and the volume reduction of the 201209080 waste plastic pre-treatment step and the moving step of the waste plastic from the sterilization treatment device to the thermal decomposition treatment device, thereby shortening the processing time, and Funds can be reduced. Further, in the above thermal decomposition treatment apparatus, the heating means is preferably a superheated vapor supply pipe that heats itself by energization. This superheated steam supply pipe is heated by itself to change the saturated vapor supplied to the inside into superheated steam, and the superheated vapor is released into the thermal decomposition tank. Thereby, the heat of the superheated steam and the superheated steam supply pipe itself can be heated in the thermal decomposition tank with higher efficiency. Further, the thermal decomposition treatment apparatus can be used as a dry heat sterilization apparatus only by energizing the superheated steam supply pipe. Further, the thermal decomposition treatment apparatus may further include a cooler for cooling the superheated steam to the outside of the thermal decomposition tank. The cooler cools the remaining superheated steam discharged from the thermal decomposition tank and returns it to the thermal decomposition tank. According to this configuration, it is possible to prevent the high temperature from being generated in the thermal decomposition tank due to the superheated steam fed into the heat decomposition tank. Further, the thermal decomposition treatment apparatus may further include an agitator that extends in parallel with the inner bottom surface of the thermal decomposition tank. By stirring the waste plastic in the thermal decomposition tank with this agitator, the residue of the organic material such as waste plastic, wood chips, paper dust, etc. after the thermal decomposition treatment can be formed into a powder, and the thermal decomposition tank can be heated more efficiently. The agitator is constructed to carry the waste plastic toward the discharge port of the waste plastic formed in the thermal decomposition tank. According to this configuration, the waste plastic which has been thermally decomposed in the thermal decomposition tank can be discharged to the outside of the thermal decomposition tank with good efficiency. Further, in the above thermal decomposition treatment apparatus, the control means controls the heating amount of the heating means, so that the temperature in the thermal decomposition tank can reach the first temperature for sterilizing the waste plastic 201209080 and the first to sterilize the waste plastic 2 temperature. The control mechanism can further control the heating amount of the heating mechanism, so that the temperature in the thermal decomposition tank can reach the third temperature for carbonizing the waste plastic, wood chips, paper dust and the like. Effect of the Invention According to the present invention, the processing time can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front cross-sectional view showing a thermal decomposition treatment apparatus of the present embodiment. Fig. 2 is a plan view showing the thermal decomposition processing apparatus of the embodiment. Fig. 3 is a left side view showing the thermal decomposition processing apparatus of the embodiment. Figure 4 is a cross-sectional view taken along line A-A of Figure 1. Fig. 5 is a right side view showing the thermal decomposition processing apparatus of the embodiment. Fig. 6 is an enlarged front view of the cooler of the embodiment. Fig. 7 is a schematic overall view of the waste plastic oil processing system of the present embodiment. (Embodiment 3) Embodiments for carrying out the invention Hereinafter, an embodiment of the thermal decomposition treatment apparatus of the present invention will be described with reference to the drawings. As shown in Fig. 1, the thermal decomposition treatment apparatus 1 of the present embodiment includes a thermal decomposition tank 2, a superheated vapor supply pipe 3 for introducing superheated steam into the thermal decomposition tank 2, and a cooling and condensing for superheated steam. Cooler 4 (cooling mechanism). The thermal decomposition tank 2 has a rectangular parallelepiped shape and is formed to be hollow inside the waste plastic 201209080. As shown in Fig. 2, a lid portion 21 for switching the waste plastic and a discharge tube 23 for discharging the pyrolysis gas generated from the waste plastic is disposed on the upper surface of the thermal decomposition tank 2, and is discharged. The tube 23 is provided with an electric damper 24 for regulating the flow rate of the pyrolysis gas, and a safety valve 25 is disposed on the thermal decomposition tank 2, and a cooling spray for supplying the cooling water to the thermal decomposition tank 2 is provided. Water supply port 26. As shown in Fig. 2 and Fig. 3, the left side surface of the thermal decomposition tank 2 is provided with two door portions 27 (discharge ports) that can be opened and closed to remove the carbides generated after the thermal decomposition treatment. In the thermal decomposition tank 2, an air gas injection port 28 for use as a primary nitrogen gas for cooling is formed. As shown in Fig. 1, a blower 6 for cooling the thermal decomposition tank 2 is provided below the heat-dissolving tank 2. As shown in Fig. 4, two agitators 5 for agitating the waste plastic in the thermal decomposition treatment are provided in the thermal decomposition tank 2. The agitator 5 has a rotary shaft 51 extending in parallel with the bottom surface of the thermal decomposition tank 2, and the rotary shaft 51 is provided with a plurality of blades 53 mounted thereon, and is rotatable in both directions by the motor 52. The agitator 5 is configured to agitate the waste plastic in the thermal decomposition tank 2 when the rotary shaft 51 is rotated in one direction by the motor 52, and to dispose the waste plastic in the thermal decomposition tank 2 when the rotary shaft 51 rotates in the opposite direction. It is carried toward the door side 27 side. Further, as shown in FIGS. i and 4, a pressure gauge 7 for measuring the pressure in the thermal decomposition tank 2 is provided in the thermal decomposition tank 2, and the heat in the thermal decomposition tank 2 is not leaked. Insulation material 8. As shown in Figs. 1 and 4, the superheated steam supply pipe 3 is disposed in the thermal decomposition tank 2, and the front side wall surface and the rear side wall surface are disposed to be vertically folded back in the thermal decomposition tank 2. The superheated hot gas supply pipe 3 is heated up to 9 Torr by electric power. The so-called heating pipe is configured to be transported from the electric cross-flow type boiler 3 to be described later, and is changed to a superheated steam of 200 to 75 passages by the saturated vapor inside. The heating amount of this superheated steam supply pipe 201209080 3 can be automatically controlled by the built-in sequencer operating panel 9 (control mechanism). The material of the superheated steam supply pipe 3 is preferably one having a corrosion resistance at a high temperature. A nickel-chromium alloy can be used. The nickel-chromium alloy is not particularly limited, but it is preferably contained in the range of 58 to 63% of nickel containing 21 to 25% of chromium, for example, Yinggaojin (registered trademark) 601. Further, when the capacity of the thermal decomposition tank 2 is 4.16 m3, the size of the superheated steam supply pipe 3 is not particularly limited, but the outer diameter is 26.7 mm, the inner diameter is 21.3 mm, and the length is 15 to 18 m, for example, the pipe size is 15 A. . As shown in Fig. 5, four coolers 4 are attached to the right side surface of the thermal decomposition tank 2. As shown in Fig. 6, the cooling pipe 4 has a cooling pipe 42 which is a double pipe, and the cooling pipe 42 is provided with a water supply port 421 for supplying cooling water between the inner pipe and the outer pipe, and for discharging the cooling water. The water discharge port 422. The cooling pipe 42 introduces the superheated steam in the thermal decomposition tank 2 into the inner pipe through the first conduit 41a, and cools and condenses the superheated steam by the cooling water flowing between the inner pipe and the outer pipe. Thereafter, the cooling pipe 42 returns the superheated steam which is formed into water by cooling and condensation, and returns to the thermal decomposition tank 2 by the second conduit. The first conduit 41a is provided with a solenoid valve 43 for stopping the discharge of superheated steam from the thermal decomposition tank 2, and the second conduit 41b is provided with a check valve 44° for preventing backflow of the superheated vapor after condensation, as shown in Fig. 7. As shown, the thermal decomposition treatment apparatus 1 having the above configuration is disposed at the most upstream of the waste plastic oil processing system 100. The thermal decomposition treatment apparatus 1 is connected to an electric tubular boiler 300 which is used to introduce saturated water by heating water which is stored in the water tank 200 to be introduced into the interior. A catalyst column 500 for modifying a pyrolyzed gas by a zeolite catalyst or the like is disposed downstream of the thermal decomposition treatment device 1, and a hydrogen-containing oxygen system 201209080 is used between the catalyst column 500 and the thermal decomposition treatment device 1 The scrubber 400 neutralizes the pyrolysis gas to remove the gas in the pyrolysis gas. Further, in the scrubber 4, a sea wave (sodium thiosulfate) solution was used as a reducing agent. A condensing device 600 for cooling the thermally decomposed gas to produce oil is disposed downstream of the catalyst column 5〇〇. The condensing device 600 has two cooling grooves 601' to allow the cooling water cooled by the cooling tower 6〇2 to flow to the outer sides of the two cooling grooves 601. Further, a centrifugal separator 7 that is used to separate water from the produced oil is disposed downstream of the condensing device 6A. The oil separated by the centrifugal separator is stored in the oil tank 8 by the first FA filter 801, and the water separated from the oil is stored in the water tank 2 by the second FA filter 20. Further, the so-called exhaust gas which is not condensed by the condensing device 600 is washed with the caustic soda solution in the exhaust gas cleaning tank 9〇1, temporarily stored in the exhaust gas tank 902, and then purified by the PIP titanium natural catalyst in the exhaust gas purifier 903. Thereafter, the exhaust gas is sterilized by the photocatalyst titanium oxide photocatalyst ceramic filter in the exhaust gas purifying device 90, and is discharged from the exhaust duct 904 to the atmosphere. Next, the thermal decomposition treatment apparatus 1 having the above configuration and the operation method of the waste plastic oil treatment system 1 provided with the thermal decomposition treatment apparatus 1 will be described. First, in a state where the electric damper 24 of the discharge pipe 23 and the electromagnetic valve 43 of the cooler 4 are closed, the lid portion 21 is opened, and the waste plastic which is infected with medical waste is put into the thermal decomposition tank 2. Thereafter, the lid portion 21 is closed, and the inside of the thermal decomposition tank 2 is sealed (see Fig. 2). Next, the superheated steam supply pipe 3 is heated up to 9 〇〇〇c by energization, whereby the heat of the superheated steam supply pipe 3 itself is heated in the thermal decomposition tank 2. When the temperature in the thermal decomposition tank 2 exceeds 18 〇t:, the heating amount of the 201209080 of the superheated steam supply pipe 3 is automatically controlled by the sequencer of the operation panel 9 so that the temperature in the thermal decomposition tank 2 does not rise again, but The temperature in the thermal decomposition tank 2 is maintained at 18 (TC or higher (first temperature) for at least 3 minutes. Thereby, the waste plastic which is infected with medical waste in the thermal decomposition tank 2 can be dry-sterilized. When the solenoid valve 43 of the cooler 4 is closed, the electric air brake 24 is opened, and after the discharge pipe 23 is opened, the electric tubular boiler 300 is actuated, and the water in the water tank 200 is supplied to the electric tubular boiler 300 by the water softener. By this, saturated steam is generated in the electric tubular boiler 300, and the saturated vapor is sent from the electric tubular boiler 3〇〇 to the superheated steam supply pipe 3. The superheated steam supply pipe 3 is heated by electricity to a maximum of 9 〇 (TC, borrowed Here, in the superheated steam supply pipe 3, the saturated vapor sent from the electric cross flow boiler 300 is changed to 200 to 750. (: superheated steam. The superheated steam generated as described above is released from the superheated steam supply pipe 3 to the thermal decomposition tank. 2, thermal decomposition 2, the superheated steam and the superheated steam supply pipe 3 are rapidly heated. Further, since the electromagnetic valve 43 is closed and the electric damper 24 is opened, the remaining superheated steam in the thermal decomposition tank 2 is not discharged to the cooler 4, and is discharged. To the discharge pipe 23. When the temperature in the thermal decomposition tank 2 rises, the waste plastic in the thermal decomposition tank 2 starts to melt. At this time, when the motor 52 of the agitator $ is driven, the rotary shaft 51 is rotated at a predetermined rotation speed. At this time, the agitator 5 agitates the molten plastic in the thermal decomposition tank 2 (refer to Fig. 4). Thus, the waste plastic in the thermal decomposition tank 2 is stirred by the agitator 5 while continuing to be in the thermal decomposition tank 2. The temperature in the thermal decomposition tank 2 is heated to 250 to 500 C (second temperature). The heating amount of the superheated steam supply pipe 3 is automatically controlled so that the temperature in the thermal decomposition tank 2 does not exceed the temperature. 2 Temperature. After the temperature in the thermal decomposition tank 2 reaches the second temperature, it can be maintained in the second temperature for a predetermined time (preferably 120 to 150 minutes) in the thermal decomposition tank 2 10 201209080, and can be taken from the thermal decomposition tank 2 The waste plastic generates a thermal decomposition gas. The hot decomposition gas can be discharged from the discharge pipe 23 to the outside of the thermal decomposition tank 2. As shown in Fig. 7, the thermal decomposition tank is removed by the scrubber 4, and the catalyst in the contact catalyst tower 500 is changed. The low-boiling gas is supplied to the condensing device 600, and is cooled and condensed by the cooling water flowing on the side of the cooling tank 601 through the cooling tank 601 of the condensing device 600. The oil is generated from the thermally decomposed gas, and the oil generated by the condensation shaking 600 is sent to the centrifugal separator 700, whereby the centrifugal separator 700 separates the water. The oil separated by the centrifugal separator 700 passes through the first FA filter 801. , after removing furfural, 'stored in the oil tank 8 〇〇. On the other hand, the water separated from the oil by the centrifugal separator 700 is removed by the second FA filter 201', and then returned to the water tank 200, and used for the formation of saturated steam. Here, the pyrolysis gas also contains a component which is not condensed by the condensing device 600. Therefore, the exhaust gas which is not condensed in the cooling tank 601 of the condensing device 600 is sent to the exhaust gas washing tank 901. The exhaust gas is washed in the exhaust gas cleaning tank 9〇1 and temporarily stored in the exhaust gas tank 902, and is supplied to the exhaust gas purifier 903 to be purified and organically decomposed. The purified and organically decomposed gas is then sterilized in the exhaust gas purifying device 900 and discharged from the exhaust duct 9〇4 to the atmosphere. After the oiling treatment is carried out in this manner, the carbonization treatment of the waste plastic after the thermal decomposition gas is formed is carried out in the thermal decomposition tank 2. In detail, in the state where the electromagnetic valve 43 is closed and the electric air brake 24 is opened, the superheated steam supply pipe 3 is heated up to 900 ° C by energization, and in the superheated steam supply pipe 3, 201209080 500 to 750 Superheated steam is produced at °C. This superheated steam is introduced into the thermal decomposition tank 2 from the superheated steam supply pipe 3, and the temperature in the thermal decomposition tank 2 is raised to 45 〇 to 65 〇 ° C (third temperature) by the superheated steam and the superheated steam supply hopper 3. The amount of heating of the superheated gas supply pipe 3 is automatically controlled so that the temperature in the thermal decomposition tank 2 does not exceed the third temperature by the sequencer of the operation panel 9. After the temperature in the thermal decomposition tank 2 reaches the third temperature, the temperature in the thermal decomposition tank 2 is maintained at the third temperature for a predetermined time (preferably 10 to 20 minutes), which can be generated in the thermal decomposition tank 2. Carbide of residue. Further, some micro-thermal decomposition gas is also generated in the carbonization treatment, and the thermal decomposition gas is also recovered in the same route as the above-described oil treatment. After the carbonization treatment, by stopping the operation of the electric tubular boiler 300, the energization of the superheated steam supply pipe 3 is stopped, and the heat of the superheated steam pipe 3 is stopped, and the thermal decomposition tank 2 is naturally cooled. Further, cooling spray water may be supplied from the cooling water spray supply port 26 to the thermal decomposition tank 2 to forcibly cool the inside of the thermal decomposition tank 2. Further, it is also possible to inject nitrogen gas into the thermal decomposition tank 2 from the nitrogen gas injection port 28 simultaneously with cooling water spray or to blow air to the thermal decomposition tank 2 by the blower 6. After the thermal decomposition tank 2 is cooled, the rotation shaft 51 of the agitator 5 is rotated at a predetermined rotation speed in a direction opposite to the rotation direction in the oiling process while the door portion 27 is always closed. As a result, since the residue in the thermal decomposition tank 2 is transported to the door portion 27 side and concentrated in the vicinity of the door portion 27, it is possible to easily recover the residue from the door portion. As described above, the thermal decomposition treatment device of the present embodiment is used for heat. The superheated steam is supplied into the decomposition tank 2, and the inside of the thermal decomposition tank 2 can be heated with good efficiency, so that the capacity of the thermal decomposition tank 2 can be increased. Therefore, the waste plastic of the object to be processed can be directly put into the thermal decomposition tank 2 in the original shape, and the sterilization treatment and thermal decomposition treatment can be continuously performed in the thermal decomposition sample 2, 12 201209080. As a result, the processing time of the entire oiling treatment can be shortened, and the oiling treatment can be performed efficiently. Further, in the thermal decomposition treatment apparatus 1 of the present embodiment, the agitator 5 is provided in parallel with the bottom surface of the thermal decomposition tank 2 in the thermal decomposition treatment tank 2. That is, since the end portion of the agitator 5 does not protrude above the thermal decomposition tank 2, the door portion 2 for introducing waste plastic on the surface of the thermal decomposition tank 2 can be enlarged. The embodiments of the present invention have been described above, and the present invention is not limited to the above, and various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the superheated steam supply pipe 3 is disposed in the thermal decomposition tank 2 and disposed on the front side wall surface and the rear side wall surface ', and is not limited thereto, and may be placed in the heat. The shape and the like of the waste plastic in the decomposition tank 2 are provided in the left and right wall surfaces, the top surface, the bottom surface, and the center portion in the thermal decomposition tank 2. Further, in the above embodiment, the 'heating means is the superheated steam supply pipe 3, and it is not limited to the inside of the thermal decomposition tank 2'. For example, it may be an electrothermal heater or the like, and a superheated steam supply pipe may be used in combination. 3 with electric heaters, etc. Further, in the above-described embodiment, the superheated steam supply pipe 3 is heated by the energization, and the sterilization process is performed, and the superheated vapor supply pipe 3 can be heated by the superheated steam supply pipe 3 and the superheated steam introduced into the thermal decomposition tank 2 by the superheated steam supply pipe 3. The inside of the thermal decomposition tank 2 is heated. Specifically, in the sterilization process, the electric air brake 24 of the discharge pipe 23 and the electromagnetic valve 43 of the cooler 4 are closed, the thermal decomposition tank 2 is sealed, and the superheated steam supply pipe 3 is heated up to 9 Torr by energization. At the same time, the electric tubular boiler 300 is operated. Thereby, the saturated vapor sent from the electric cross-flow type boiler 3 to the superheated steam supply pipe 3 is changed to 13 201209080 200 to 75 (TC, superheated steam is released from the superheated steam supply pipe 3 to thermal decomposition in the superheated steam supply pipe 3 In the tank 2, the heat of the superheated steam and the superheated steam supply pipe 3 is used to heat the inside of the thermal decomposition tank 2 to 180 ° C or higher (first temperature), and the temperature in the thermal decomposition tank 2 is maintained at at least the first temperature. The sterilizing treatment of the waste plastic is carried out for 30 minutes. In this case, when the sterilizing treatment is performed by using the heat of the superheated steam supply pipe 3 itself and the superheated steam, it is preferable to use the cooler 4. As described in detail, when the sterilizing treatment is performed, the electric damper is closed. 24, at the same time, the solenoid valve 43 is opened, and the remaining superheated steam in the thermal decomposition tank 2 is introduced into the inner tube of the cooling pipe 42 through the first conduit 41a. This superheated vapor is in the inner tube of the cooling pipe 42 to The cooling water flowing between the inner tube and the outer tube is cooled and condensed, and then returned to the thermal decomposition tank 2 by the second conduit 41b (see Fig. 6). Thereby, high pressure is prevented from being formed in the thermal decomposition tank 2. In addition, it can also be thermally decomposed In addition, the photocatalyst such as titanium oxide is sterilized by the condensing of the cooler 4 to form a superheated steam of water for reuse, and the remaining superheated vapor discharged from the thermal decomposition tank 2 may be used without using the cooler 4. In this case, the superheated steam is incinerated before being exposed to the outside air. Further, in the above embodiment, the thermal decomposition treatment apparatus 1 is subjected to sterilization treatment and thermal decomposition treatment, but the invention is not limited thereto, and may be used as a sterilization apparatus alone. Further, in the above embodiment, the thermal decomposition tank 2 is a substantially rectangular parallelepiped, but is not limited thereto, and may have various shapes such as a columnar shape and a polygonal column shape. Further, in the above embodiment, the agitator 5 has a plurality of blades. The shape of the shape of 53 is not limited thereto, and may be various shapes such as a spiral shape. 14 201209080 In the above embodiment, the thermal decomposition apparatus 1 is disposed in the seventh embodiment. The illustrated waste plastic oiling treatment system 100 is not limited thereto, and can be disposed in various well-known waste plastic oiling treatment systems. [Simplified Schematic] Figure 1 is the present embodiment. Fig. 2 is a plan view of a thermal decomposition treatment apparatus of the present embodiment. Fig. 3 is a left side view of the thermal decomposition treatment apparatus of the embodiment. Fig. 4 is a first diagram Fig. 5 is a right side view of the thermal decomposition processing apparatus of the present embodiment. Fig. 6 is an enlarged front view of the cooler of the embodiment. Fig. 7 is a view of the waste plastic oiling treatment of the embodiment. Overview of the system. [Main component symbol description] 1... Thermal decomposition treatment device 24...Electric air brake 2... Thermal decomposition tank 25... Safety valve 3... Superheated steam supply pipe 26. .. Cooling water supply port 4...Cooler (cooling mechanism) 27...door (discharge port) 5...Agitator 28...nitrogen injection port 6...air blower 41a...first conduit 7.··pressure gauge 41b...second conduit 8...heat insulation material 42...cooling pipe 9...operation panel (control mechanism) 43...solar valve 21...cover portion 44... Return valve 23... discharge pipe 51... rotating shaft 15 201209080 52... motor 601... cooling tank 53... blade 602... cooling tower 100... waste plastic oiling treatment system 700. .. centrifugal split Machine 200...sink 800...oil tank 201...second FA filter 801...first FA filter 300...electric tubular boiler 900...exhaust gas purification device 400...washer 901. .. exhaust gas cleaning tank 421... water supply port 902... exhaust gas tank 422... water discharge port 903... exhaust gas purifier 500.. catalyst tower 600.. condensing device 904... Exhaust duct 16