JP4117244B2 - Waste plastic oil processing equipment - Google Patents

Waste plastic oil processing equipment Download PDF

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JP4117244B2
JP4117244B2 JP2003409122A JP2003409122A JP4117244B2 JP 4117244 B2 JP4117244 B2 JP 4117244B2 JP 2003409122 A JP2003409122 A JP 2003409122A JP 2003409122 A JP2003409122 A JP 2003409122A JP 4117244 B2 JP4117244 B2 JP 4117244B2
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oil
waste plastic
gas
pyrolysis furnace
pipe
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JP2005170986A (en
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幸雄 小林
嘉彦 松本
正隆 塚田
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Nakamoto Packs Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
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Description

本発明は、廃プラスチックから再生油を得るための処理を行う廃プラスチック油化処理装置に関し、さらに詳しくは、廃プラスチックを連続的に供給できるようにして効率良く再生油を生産できるようにした廃プラスチック油化処理装置に関するものである。   The present invention relates to a waste plastic oil converting apparatus that performs a process for obtaining recycled oil from waste plastic, and more specifically, waste that enables the supply of waste plastic continuously to efficiently produce recycled oil. The present invention relates to a plastic oil processing apparatus.

従来、プラスチックのリサイクル処理装置の一形式として、熱可塑性プラスチック製の容器やショッピングバッグ等の廃プラスチックから良質な軽質油を工業的に生成・固収する廃プラスチック油化処理装置が知られている。   2. Description of the Related Art Conventionally, as one type of plastic recycling apparatus, there is known a waste plastic oil converting apparatus that industrially generates and collects high-quality light oil from waste plastic such as thermoplastic containers and shopping bags. .

この廃プラスチック油化処理装置としては、例えば、廃プラスチックを熱分解して分解ガスを生成する熱分解炉と、該熱分解炉で生成された分解ガスを軽質油留分ガスに分解する触媒反応槽と、該触媒反応槽で生成された軽質油留分ガスを液化させて再生油を得るコンデンサとを有し、廃プラスチックを熱分解炉で熱分解した後、この熱分解により生成された分解ガスを触媒反応槽において触媒と接触させて軽質油留分ガスに分解し、この軽質油留分ガスをコンデンサで液化させて再生油を得ていた。   Examples of the waste plastic oil converting apparatus include a pyrolysis furnace that thermally decomposes waste plastic to generate a cracked gas, and a catalytic reaction that decomposes the cracked gas generated in the pyrolysis furnace into a light oil fraction gas. A tank and a condenser for liquefying the light oil distillate gas generated in the catalytic reaction tank to obtain regenerated oil. After the waste plastic is pyrolyzed in a pyrolysis furnace, the decomposition generated by this pyrolysis The gas was brought into contact with the catalyst in the catalytic reaction tank and decomposed into light oil fraction gas, and this light oil fraction gas was liquefied with a condenser to obtain regenerated oil.

そして、熱分解炉に廃プラスチックを供給するには、熱分解炉の容量に応じて所定量づつ投入して供給していた（例えば、特許文献１参照）。
特開２００３−３０１１８５号公報 In order to supply the waste plastic to the pyrolysis furnace, a predetermined amount is charged and supplied in accordance with the capacity of the pyrolysis furnace (see, for example, Patent Document 1).
JP 2003-301185 A

しかしながら、上述した従来の廃プラスチック油化処理装置においては、一連の油化処理が終了する毎に廃プラスチックを供給するバッチ式であるので、油化処理の効率が悪いという問題があった。   However, the conventional waste plastic oil processing apparatus described above has a problem that the efficiency of the oil processing is poor because it is a batch system that supplies waste plastic every time a series of oil processing is completed.

本発明は、以上の問題点を解決し、効率良く油化処理を行なえる廃プラスチック油化処理装置を提供することを目的とする。   An object of the present invention is to solve the above-described problems and to provide a waste plastic oil processing apparatus capable of efficiently performing oil processing.

本発明者らは、上記問題点を解決するために鋭意検討し、押出機を用いて溶融状態の廃プラスチックを連続供給することにより、極めて効率良く油化処理することを見出した。さらに、押出機を用いた場合、熱分解炉で発生した分解ガスが押出機に流入する恐れがあり、この分解ガスの流入を防止するには、押出機と熱分解炉とを連結する連結管を、押出機の出口から立ち上げることにより防止できることを見出し、本発明を完成させたものである。   The present inventors have intensively studied to solve the above-mentioned problems, and have found that oily treatment can be performed extremely efficiently by continuously supplying molten waste plastic using an extruder. Furthermore, when an extruder is used, the cracked gas generated in the pyrolysis furnace may flow into the extruder. To prevent the cracked gas from flowing in, a connecting pipe connecting the extruder and the pyrolysis furnace is used. Has been found to be able to be prevented by starting from the outlet of the extruder, and the present invention has been completed.

すなわち、本発明による廃プラスチック油化処理装置は、廃プラスチックを熱分解して分解ガスを生成する熱分解炉と、該熱分解炉で生成された分解ガスを軽質油留分ガスに分解する触媒反応槽と、該触媒反応槽で生成された軽質油留分ガスを液化させて再生油を得るコンデンサとを有する廃プラスチック油化処理装置であって、前記熱分解炉に溶融廃プラスチックを連続的に供給する押出機が設けられ、該溶融廃プラスチックを供給するために押出機と熱分解炉とを連結した連結管が、押出機の出口から上方へ立上がった後熱分解炉に連結されていることを特徴として構成されている。   That is, the waste plastic oil treatment apparatus according to the present invention includes a pyrolysis furnace that pyrolyzes waste plastic to generate cracked gas, and a catalyst that cracks the cracked gas generated in the pyrolysis furnace into light oil fraction gas. A waste plastic oil treatment apparatus comprising a reaction tank and a condenser for liquefying light oil fraction gas generated in the catalyst reaction tank to obtain regenerated oil, wherein molten waste plastic is continuously fed into the pyrolysis furnace. And a connecting pipe connecting the extruder and the pyrolysis furnace is connected to the pyrolysis furnace after rising upward from the outlet of the extruder. It is configured as a feature.

本発明による廃プラスチック油化処理装置においては、押出機が廃プラスチックを溶融した状態で熱分解炉に供給するので、チップ状の廃プラスチックを供給するのに比べ、熱分解炉における熱分解を効率良く行なうことができる。また、押出機は廃プラスチックを連続的に熱分解炉に供給するので、油化処理装置を停止させることなく連続して油化処理することができ、効率良く油化処理を行なうことができる。さらに、押出機と熱分解炉とを連結する連結管が立上がった後熱分解炉に連結されているので、連結管の立上がった部位における溶融廃プラスチックが、熱分解炉で発生した分解ガスが押出機に流入するのを防止している。   In the waste plastic oil processing apparatus according to the present invention, the extruder supplies the waste plastic in a molten state to the pyrolysis furnace, so that the thermal decomposition in the pyrolysis furnace is more efficient than the supply of chip-like waste plastic. Can be done well. Further, since the extruder continuously supplies the waste plastic to the pyrolysis furnace, it can be continuously oiled without stopping the oil processing apparatus, and the oil processing can be performed efficiently. Furthermore, since the connecting pipe that connects the extruder and the pyrolysis furnace is connected to the pyrolysis furnace after the startup, the molten waste plastic at the rising part of the connecting pipe is decomposed gas generated in the pyrolysis furnace. Is prevented from flowing into the extruder.

本発明による廃プラスチック油化処理装置においては、熱分解炉に溶融廃プラスチックを連続的に供給する押出機を設けている。この押出機としては、特に限定されるものでなく、押出成形に従来用いられているものを利用することができる。   In the waste plastic oil converting apparatus according to the present invention, an extruder for continuously supplying molten waste plastic to the pyrolysis furnace is provided. The extruder is not particularly limited, and those conventionally used for extrusion molding can be used.

押出機と熱分解炉とは連結管で連結され、この連結管を介して溶融廃プラスチックを熱分解炉へ供給するようになっており、連結管は押出機の出口から上方へ立上った後熱分解炉に連結されている。この連結管の立上った高さは、熱分解炉で生成された分解ガスが押出機に流入するのを防止できるだけの高さであればよく、熱分解炉の容量、連結管の径等によって適宜設定し、また、長くするほど効果があるが、長くなり過ぎるとギヤポンプを設けて送る必要が出てくるので好ましくない。一般的に、２０００〜３０００ｍｍの範囲が好ましい。   The extruder and the pyrolysis furnace are connected by a connecting pipe, and the molten waste plastic is supplied to the pyrolysis furnace through the connecting pipe, and the connecting pipe rises upward from the outlet of the extruder. It is connected to a post pyrolysis furnace. The height of the connection pipe may be high enough to prevent the cracked gas generated in the pyrolysis furnace from flowing into the extruder, such as the capacity of the pyrolysis furnace, the diameter of the connection pipe, etc. However, if the length is too long, it is not preferable because a gear pump needs to be provided and sent. Generally, a range of 2000 to 3000 mm is preferable.

コンデンサの再生油の出口に連結された回収油管に、回収油管内面に付着した固形分を水蒸気で除去する水蒸気供給手段を設けることが好ましい。このような構成にすることにより、回収油管内面に付着したテレフタル酸等の固形物を除去し、回収油管における再生油の流れを円滑にすることができる。   It is preferable to provide a steam supply means for removing the solid content adhering to the inner surface of the recovered oil pipe with steam on the recovered oil pipe connected to the outlet of the regenerated oil of the condenser. By adopting such a configuration, solid matter such as terephthalic acid adhering to the inner surface of the recovered oil pipe can be removed, and the flow of regenerated oil in the recovered oil pipe can be made smooth.

本発明による廃プラスチック油化処理装置に用いる廃プラスチックとしては、ポリエチレンテレフタレート、ポリエチレン、ポリプロピレン、ＰＳ等があり、また、その形態としては、ボトル、シート、フィルム等がある。   Examples of the waste plastic used in the waste plastic oil processing apparatus according to the present invention include polyethylene terephthalate, polyethylene, polypropylene, and PS. Examples of the form include bottles, sheets, and films.

本発明による廃プラスチック油化処理装置の一実施形態を図面を参照して説明する。図１は、廃プラスチック油化処理装置の全体を示す構成図である。   An embodiment of a waste plastic oil converting apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing the entire waste plastic oil processing apparatus.

図１において、１０は廃プラスチックのチップを貯蔵する貯蔵ホッパ、２０は貯蔵ホッパ１０から投入された廃プラスチックのチップを溶融して押し出す押出機、３０は押出機２０から供給された溶融廃プラスチックを熱分解する熱分解炉、４０は熱分解炉３０から供給された分解ガスを軽質油留分ガスに分解する触媒反応槽、５０は触媒反応槽４０から供給された軽質留分ガスを液化させて再生油を得る第１コンデンサ、６０は第１コンデンサ５０から供給された軽質留分ガスを液化させえて再生油を得る第２コンデンサ、７０は第１コンデンサ５０及び第２コンデンサ６０で得た再生油を回収する回収油タンク、８０は回収油タンク７０から送られて来た再生油から不純物を除去する遠心分離機、９０は遠心分離機８０から送られて来た不純物が除去された再生油を貯溜するリザーブタンク、１００は第２コンデンサ６０から送られて来る液化せずにガスのままで存在するオフガス（メタン、エタン、プロパン、ブタンガス等）中の微粒子を集塵するスクラバ、１１０はスクラバ１００送られてくるオフガスを燃焼させるオフガス脱臭炉である。   In FIG. 1, 10 is a storage hopper for storing waste plastic chips, 20 is an extruder for melting and extruding waste plastic chips charged from the storage hopper 10, and 30 is a molten waste plastic supplied from the extruder 20. A pyrolysis furnace for pyrolysis, 40 is a catalytic reaction tank for decomposing the cracked gas supplied from the pyrolysis furnace 30 into light oil fraction gas, and 50 is a liquefaction of the light fraction gas supplied from the catalyst reaction tank 40. A first condenser 60 for obtaining regenerated oil, a second condenser 60 for liquefying the light fraction gas supplied from the first condenser 50 to obtain reclaimed oil, and a regenerated oil 70 obtained by the first condenser 50 and the second condenser 60. Is a recovered oil tank, 80 is a centrifuge that removes impurities from the recycled oil sent from the recovered oil tank 70, and 90 is sent from the centrifuge 80 A reserve tank 100 for storing reclaimed oil from which pure substances have been removed, 100 is a fine particle in off-gas (methane, ethane, propane, butane gas, etc.) that is sent from the second condenser 60 and remains as a gas without being liquefied. A scrubber 110 that collects dust is an off-gas deodorization furnace that burns off-gas sent to the scrubber 100.

前記貯蔵ホッパ１０は押出機２０の投入口に連結されており、連続的に廃プラスチックチップを投入するようになっている。押出機２０は内部に吐出圧力を検知する圧力センサ（図示せず）が設けられている。また、出口には連結管２１が連結され、この連結管２１の他端が熱分解炉３０に連結されており、この連結管２１の途中には、エアーアクチュエータにより駆動するバルブ２２、２３が設けられている。   The storage hopper 10 is connected to an inlet of the extruder 20 and continuously inputs waste plastic chips. The extruder 20 is provided with a pressure sensor (not shown) for detecting the discharge pressure. Further, a connecting pipe 21 is connected to the outlet, and the other end of the connecting pipe 21 is connected to the pyrolysis furnace 30, and valves 22 and 23 driven by an air actuator are provided in the middle of the connecting pipe 21. It has been.

連結管２１は、押出機２０の出口から上方へ立上った後熱分解炉３０に連結されており、連結管２１の立上った高さｈは、２０００〜３０００ｍｍの範囲で設定されている。   The connecting pipe 21 rises upward from the outlet of the extruder 20 and is then connected to the pyrolysis furnace 30. The rising height h of the connecting pipe 21 is set in a range of 2000 to 3000 mm. Yes.

前記熱分解炉３０は、溶融廃プラスチックを加熱分解する熱分解釜３１と、この熱分解釜３１を加熱する燃焼炉３２が設けられており、前記連結管２１は熱分解釜３１の天板に連結されている。熱分解釜３１の内部には、溶融廃プラスチックを攪拌する攪拌機３３が設けられ、また、熱分解釜３１内の圧力を検知する圧力センサ３４が設けられるとともに、熱分解釜３１内の温度を検知する温度センサ３５が設けられている。   The pyrolysis furnace 30 is provided with a pyrolysis kettle 31 for thermally decomposing the molten waste plastic and a combustion furnace 32 for heating the pyrolysis kettle 31, and the connecting pipe 21 is attached to the top plate of the pyrolysis kettle 31. It is connected. An agitator 33 for agitating the molten waste plastic is provided inside the pyrolysis kettle 31, and a pressure sensor 34 for sensing the pressure in the pyrolysis kettle 31 is provided, and the temperature in the pyrolysis kettle 31 is detected. A temperature sensor 35 is provided.

さらに、熱分解釜３１には窒素を供給するための窒素用配管３６が連結され、この窒素用配管３６は窒素流量監視装置３７を介して窒素ガスタンク等の窒素ガス源（図示せず）に連結されている。また、窒素流量監視装置３７の上流に位置する窒素用配管３６部分が、連結管２１のバルブ２２とバルブ２３との間に連結され、連結管２１に窒素を供給できるようになっている。また、熱分解釜３１には、生成された分解ガスを触媒反応槽４０を送るための分解ガス管３８が連結されている。   Further, a nitrogen pipe 36 for supplying nitrogen is connected to the pyrolysis vessel 31, and this nitrogen pipe 36 is connected to a nitrogen gas source (not shown) such as a nitrogen gas tank via a nitrogen flow rate monitoring device 37. Has been. A nitrogen pipe 36 located upstream of the nitrogen flow rate monitoring device 37 is connected between the valve 22 and the valve 23 of the connecting pipe 21 so that nitrogen can be supplied to the connecting pipe 21. In addition, a cracking gas pipe 38 for sending the generated cracked gas to the catalytic reaction tank 40 is connected to the pyrolysis pot 31.

前記触媒反応槽４０は、反応槽本体４１と、その周囲に設けられた加熱部４２とを有しており、反応槽本体４１に前記分解ガス管３８が連結されるとともに、発生した軽質油留分ガスを第１コンデンサ５０に送り込むための留分ガス管４３が連結されている。また、加熱部４２は、前記燃焼炉３２の排ガスを送り込むことが出来るように排ガス管３９で燃焼炉３２に連結されている。   The catalytic reaction tank 40 includes a reaction tank main body 41 and a heating unit 42 provided around the reaction tank main body 41. The cracked gas pipe 38 is connected to the reaction tank main body 41, and the generated light oil fraction is generated. A fraction gas pipe 43 for feeding the fraction gas to the first condenser 50 is connected. The heating unit 42 is connected to the combustion furnace 32 by an exhaust gas pipe 39 so that the exhaust gas of the combustion furnace 32 can be sent.

前記第１コンデンサ５０は、温水機５１が設けられ加温されるようになっていいる。また、液化した再生油を回収油タンク７０に送り込むための第１回収油管５２が連結されており、この第１回収油管５２の第１コンデンサ５０の出口に近い部位には、第１回収油管５２の内面に付着した固形物（テレフタル酸等）を除去するために、水蒸気を管内に吹付ける水蒸気供給手段５３が設けられている。さらに、液化しなかった軽質油留分ガスを第２コンデンサ６０に送り込むための留分ガス管５４が連結されている。   The first condenser 50 is provided with a hot water machine 51 so as to be heated. A first recovered oil pipe 52 for sending liquefied recycled oil to the recovered oil tank 70 is connected. The first recovered oil pipe 52 is connected to a portion of the first recovered oil pipe 52 near the outlet of the first condenser 50. In order to remove solid matter (such as terephthalic acid) adhering to the inner surface, water vapor supply means 53 for blowing water vapor into the pipe is provided. Further, a distillate gas pipe 54 for feeding light oil distillate gas that has not been liquefied to the second condenser 60 is connected.

前記第２コンデンサ６０は、冷却機６１が設けられ冷却されるようになっている。また、液化した再生油を回収油タンク７０に送り込むための複数の第２回収油管６２が連結されており、この第２回収油管６２の第２コンデンサ６０の出口に近い部位には、第１回収油管５２と同様に、水蒸気供給手段６３が設けられている。さらに、オフガスをスクラバ１００に送り込むためのオフガス管６４が連結されている。スクラバ１００には、微粒子の除去に用いる水を供給するための水タンク１０１が設けられ、集塵されたオフガスをオフガス脱臭炉１１０に送り込むためのオフガス管１０２が連結されている。   The second capacitor 60 is cooled by a cooler 61. A plurality of second recovery oil pipes 62 for feeding the liquefied recycled oil to the recovery oil tank 70 are connected, and a portion of the second recovery oil pipe 62 near the outlet of the second condenser 60 is connected to the first recovery oil pipe 62. Similar to the oil pipe 52, a water vapor supply means 63 is provided. Further, an offgas pipe 64 for sending offgas to the scrubber 100 is connected. The scrubber 100 is provided with a water tank 101 for supplying water used for removing fine particles, and is connected to an offgas pipe 102 for sending the collected offgas to the offgas deodorizing furnace 110.

前記回収油タンク７０は、前記第１回収油管５２及び第２回収油管６２より再生油が送り込まれるようになっており、また、再生油を遠心分離機８０に送り込むための再生油管７１が連結されている。遠心分離機８０は、不純物を除去した再生油をリザーブタンク９０に送り込むための再生油管８１が連結されている。リザーブタンク９０は、前記燃焼炉３２のバーナに再生油を送り込むための送油管９１が連結され、回収された再生油の一部を燃焼炉３２に利用している。また、タンク等の貯蔵施設（図示せず）に送り込むための送油管９２が連結されている。   The recovered oil tank 70 is configured such that regenerated oil is sent from the first recovered oil pipe 52 and the second recovered oil pipe 62, and a regenerated oil pipe 71 for sending the regenerated oil to the centrifuge 80 is connected to the recovered oil tank 70. ing. The centrifuge 80 is connected to a regenerated oil pipe 81 for sending regenerated oil from which impurities have been removed to the reserve tank 90. The reserve tank 90 is connected to an oil feed pipe 91 for feeding regenerated oil to the burner of the combustion furnace 32, and a part of the recovered reclaimed oil is used for the combustion furnace 32. Further, an oil feed pipe 92 for feeding into a storage facility (not shown) such as a tank is connected.

次に、以上のような廃プラスチック油化処理装置の動作を説明する。   Next, the operation of the waste plastic oil converting apparatus as described above will be described.

まず、廃プラスチック（熱可塑性プラスチックからなるプラスチック容器、ショッピング袋等）をチップ状に破砕し、貯蔵ホッパ１０に投入する。投入された廃プラスチックチップは押出機２０に供給され、押出機２０において溶融された状態で押出され、連結管２１を介して熱分解釜３１に供給される。   First, waste plastic (plastic container made of thermoplastic plastic, shopping bag, etc.) is crushed into chips and put into the storage hopper 10. The thrown-out waste plastic chips are supplied to the extruder 20, extruded in a melted state in the extruder 20, and supplied to the thermal decomposition pot 31 through the connecting pipe 21.

なお、この時、熱分解釜３１（容量：３．８３ｍ２）は、窒素ガス源から窒素用配管３６を介して窒素が充填され（総窒素充填量：約８ｍ２）窒素に置換されている。この窒素の充填は、１０分間窒素を充填した後バーナを着火し、このバーナ着火後も１０分間充填を継続することにより行なっている。また、窒素流量監視装置３７で窒素の流量を検知しており、窒素用配管３６の詰り等により窒素の充填が不良な場合は、バーナの着火をしないようになっている。 At this time, the pyrolysis vessel 31 (capacity: 3.83 m 2 ) is filled with nitrogen from the nitrogen gas source via the nitrogen pipe 36 (total nitrogen filling amount: about 8 m 2 ) and is replaced with nitrogen. . This nitrogen filling is performed by igniting the burner after filling with nitrogen for 10 minutes, and continuing the filling for 10 minutes after the ignition of the burner. Further, the nitrogen flow rate is detected by the nitrogen flow rate monitoring device 37, and if the nitrogen filling is poor due to clogging of the nitrogen pipe 36, the burner is not ignited.

熱分解釜３１に供給された溶融廃プラスチックは、攪拌機３３で攪拌されるとともに、空気が遮断された状態で加熱されガス化し、いわゆる乾留が行なわれる。この時、押出機２０の吐出圧を圧力センサで検知しており、吐出圧が低下した場合、バルブ２２、２３を閉鎖し、窒素ガス源より連結管２１に窒素を充填し、さらにバーナを失火する。また、熱分解釜３１内の圧力は圧力センサ３４が検知しており、所定圧より低圧となった場合は、バーナを失火し、さらに窒素ガスを充填する。一方、所定圧より高圧となった場合は、バーナを失火し、さらにガス化が異常に進んだ場合は、安全弁からガスを外部へ放出する。さらに、熱分解釜３１内の温度は温度センサ３５で検知されており、所定温度より高温になった場合、バーナを失火する。   The molten waste plastic supplied to the pyrolysis kettle 31 is stirred by the stirrer 33 and heated and gasified in a state where the air is shut off, so-called dry distillation is performed. At this time, the discharge pressure of the extruder 20 is detected by a pressure sensor. When the discharge pressure decreases, the valves 22 and 23 are closed, the connecting pipe 21 is filled with nitrogen from the nitrogen gas source, and the burner is misfired. To do. Further, the pressure in the pyrolysis pot 31 is detected by the pressure sensor 34. When the pressure becomes lower than a predetermined pressure, the burner is misfired and further filled with nitrogen gas. On the other hand, when the pressure becomes higher than the predetermined pressure, the burner is misfired, and when the gasification progresses abnormally, the gas is discharged to the outside from the safety valve. Further, the temperature in the pyrolysis pot 31 is detected by the temperature sensor 35, and when the temperature becomes higher than a predetermined temperature, the burner is misfired.

また、熱分解釜３１内のガス圧が高くなったとしても、連結管２１の立上がった部位により分解ガスが押出機２０に流入するのを防止している。   Moreover, even if the gas pressure in the thermal decomposition pot 31 becomes high, the portion where the connecting pipe 21 rises prevents the decomposition gas from flowing into the extruder 20.

熱分解炉３０の熱分解釜３１で生成された高温の分解ガス（炭素数１〜２５程度の炭化水素が主成分）は、触媒反応槽４０に送られ、炭素数の多い重質油ガス分子の炭素鎖を切って炭素数の小さい軽質油ガス分子（軽質油留分ガス）に分解され、軽質油留分ガスが生成される。   High-temperature cracked gas (mainly composed of hydrocarbons having about 1 to 25 carbon atoms) generated in the pyrolysis furnace 31 of the pyrolysis furnace 30 is sent to the catalytic reaction tank 40, where heavy oil gas molecules having a large number of carbon atoms are contained. Is broken into light oil gas molecules (light oil fraction gas) having a small number of carbon atoms to produce light oil fraction gas.

触媒反応槽４０で生成した軽質油留分ガスは、まず、第１コンデンサ５０へ送られ液化されて再生油が生成され、回収油タンク７０に回収され、また、第１コンデンサ５０で液化されなかった軽質油留分ガスは、第２コンデンサ６０へ送られ液化され、同様に回収油タンク７０に回収される。   The light oil fraction gas generated in the catalytic reaction tank 40 is first sent to the first condenser 50 to be liquefied to generate regenerated oil, recovered in the recovered oil tank 70, and not liquefied in the first condenser 50. The light oil fraction gas is sent to the second condenser 60 and liquefied, and is similarly recovered in the recovered oil tank 70.

この第１コンデンサ５０及び第２コンデンサ６０の第１回収油管５２及び第２回収油管６２のコンデンサの出口に近い部位においては温度が低下するので、例えば、ＰＥＴボトルを廃プラスチックとして分解した場合、テレフタル酸が管の内面に固形物として付着する場合がある。したがって、固形物が付着した場合、水蒸気供給手段５３、６３で内面に水蒸気を吹付けることにより付着した固形物を除去する。   Since the temperature of the first condenser oil pipe 52 and the second condenser oil pipe 62 of the first condenser 50 and the second condenser 60 near the outlet of the condenser decreases, for example, when the PET bottle is decomposed as waste plastic, The acid may adhere to the inner surface of the tube as a solid. Therefore, when a solid matter adheres, the attached solid matter is removed by spraying steam on the inner surface by the steam supply means 53 and 63.

回収油タンク７０に回収された再生油は、遠心分離機８０により水分、炭素等の不純物が除去され、最終的な再生油としてリザーブタンク９０に送られる。リザーブタンク９０に送られた再生油は、貯蔵施設に送られるが、その一部は熱分解釜３１のバーナに送られ燃料となる。   The recycled oil recovered in the recovered oil tank 70 is freed of impurities such as moisture and carbon by the centrifuge 80 and is sent to the reserve tank 90 as the final recycled oil. The reclaimed oil sent to the reserve tank 90 is sent to the storage facility, but part of it is sent to the burner of the pyrolysis kettle 31 to become fuel.

なお、熱分解炉３０からの分解ガスの多くは第１及び第２コンデンサ５０、６０で液化して再生油となるが、一部は液化せずにガスのままで存在し、いわゆるオフガス（メタン、エタン、プロパン、ブタン等を含む）となる。このオフガスは、第２コンデンサ６０からスクラバ１００に送られ集麈された後、オフガス脱臭炉１１０にて燃焼させる。   Note that most of the cracked gas from the pyrolysis furnace 30 is liquefied by the first and second capacitors 50 and 60 to become regenerated oil, but a part of the cracked gas remains as it is without being liquefied. , Ethane, propane, butane, etc.). The off gas is sent from the second condenser 60 to the scrubber 100 and collected, and then burned in the off gas deodorizing furnace 110.

本願発明による廃プラスチック油化処理装置の一実施形態を示す全体構成図である。It is a whole block diagram which shows one Embodiment of the waste plastic oil-ized processing apparatus by this invention.

符号の説明Explanation of symbols

１０ 貯蔵ホッパ
２０ 押出機
２１ 連結管
３０ 熱分解炉
４０ 触媒反応槽
５０ 第１コンデンサ
５３ 水蒸気供給手段
６０ 第２コンデンサ
６３ 水蒸気供給手段
７０ 回収油タンク
８０ 遠心分離機
９０ リザーブタンク
１００ スクラバ
１１０ オフガス脱臭炉 DESCRIPTION OF SYMBOLS 10 Storage hopper 20 Extruder 21 Connection pipe 30 Pyrolysis furnace 40 Catalytic reaction tank 50 1st capacitor | condenser 53 Water vapor | steam supply means 60 2nd capacitor | condenser 63 Water vapor | steam supply means 70 Recovery oil tank 80 Centrifugal separator 90 Reserve tank 100 Scrubber 110 Off-gas deodorization furnace

Claims (3)

廃プラスチックを熱分解して分解ガスを生成する熱分解炉と、該熱分解炉で生成された分解ガスを軽質油留分ガスに分解する触媒反応槽と、該触媒反応槽で生成された軽質油留分ガスを液化させて再生油を得るコンデンサとを有する廃プラスチック油化処理装置であって、前記熱分解炉に溶融廃プラスチックを連続的に供給する押出機が設けられ、該溶融廃プラスチックを供給するために押出機と熱分解炉とを連結した連結管が、押出機の出口から上方へ立上がった後熱分解炉に連結されていることを特徴とする廃プラスチック油化処理装置。 A pyrolysis furnace that thermally decomposes waste plastic to generate cracked gas, a catalytic reaction tank that decomposes the cracked gas generated in the thermal cracking furnace into light oil fraction gas, and a light light generated in the catalyst reaction tank A waste plastic liquefaction processing apparatus having a condenser for liquefying an oil fraction gas to obtain regenerated oil, wherein an extruder for continuously supplying the molten waste plastic to the pyrolysis furnace is provided, and the molten waste plastic A waste plastic oil processing apparatus characterized in that a connecting pipe connecting an extruder and a pyrolysis furnace is connected to the pyrolysis furnace after rising upward from the outlet of the extruder. 前記連結管の立上がった高さが、２０００〜３０００ｍｍである請求項１記載の廃プラスチック油化処理装置。   2. The waste plastic oil converting apparatus according to claim 1, wherein a height at which the connection pipe rises is 2000 to 3000 mm. 前記コンデンサの再生油の出口に連結された回収油管に、回収油管内面に付着した固形分を水蒸気で除去する水蒸気供給手段が設けられている請求項１又は２記載の廃プラスチック油化処理装置。   The waste plastic oil processing apparatus according to claim 1 or 2, wherein the recovery oil pipe connected to the outlet of the regenerated oil of the capacitor is provided with a water vapor supply means for removing the solid content adhering to the inner surface of the recovery oil pipe with water vapor.
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JP4959976B2 (en) * 2005-12-14 2012-06-27 株式会社東芝 Waste pyrolysis treatment system and method
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US10472487B2 (en) 2015-12-30 2019-11-12 Greenmantra Recycling Technologies Ltd. Reactor for continuously treating polymeric material
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US10723858B2 (en) 2018-09-18 2020-07-28 Greenmantra Recycling Technologies Ltd. Method for purification of depolymerized polymers using supercritical fluid extraction
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