JP4189818B2

JP4189818B2 - Incinerator

Info

Publication number: JP4189818B2
Application number: JP2004061050A
Authority: JP
Inventors: 通泰大和; 勇記大和; 修金子
Original assignee: 和光機械工業株式会社
Priority date: 2004-03-04
Filing date: 2004-03-04
Publication date: 2008-12-03
Anticipated expiration: 2024-03-04
Also published as: JP2005249306A

Description

本発明は、被燃焼物としての廃棄物を焼却する焼却炉に関し、特に廃棄物としてのプラスチックス（以下、破棄プラスチックス又は廃プラと略称する）を焼却する焼却炉に関する。 The present invention relates to an incinerator for incinerating waste as combustibles, and more particularly to an incinerator for incinerating plastics as waste (hereinafter abbreviated as discarded plastics or waste plastic).

従来、廃プラの焼却に関しては、焼却炉体の中で燃焼が完全に燃焼仕切れずに、燃焼が不完全な状態で焼却炉体内に流動した状態で、焼却炉体外へ流れ出すことがあり、問題となっていた。 Conventionally, regarding the incineration of waste plastics, the combustion may not flow completely inside the incinerator body, but may flow out of the incinerator body in a state in which the combustion is incomplete and flows out of the incinerator body. It was.

特許文献１に記載の発明には、「底部にロストルを備え、前壁に廃棄物投入口を有して一次燃焼室を形成する炉体と、この炉体部に連通し前記一次燃焼室から流れてくる燃焼ガスを高温化するバーナを有する排気筒と、この排気筒に連通して上端に排気口を有するとともに、筒内に加圧空気を供給する二次空気供給管を同心配置して二次燃焼室を形成する燃焼筒とを備えてなる小規模焼却炉と、前記小規模焼却炉の廃棄物投入口に該廃棄物投入口を開閉可能に設けられ、前記廃棄物投入口を閉塞した状態で廃棄物を炉体内の一次燃焼室に投入することができる外気遮断投入装置とからなる」外気遮断投入装置付小規模焼却炉が記載されている。しかし、廃プラの焼却に関しての環境基準（環境省の「ダイオキシン類対策特別措置法」を指す。以下同じ）に対する対策は取られていない。 According to the invention described in Patent Document 1, “a furnace body having a rooster at the bottom and having a waste inlet on the front wall to form a primary combustion chamber, and communicating with the furnace body portion from the primary combustion chamber An exhaust cylinder having a burner for heating the flowing combustion gas, a secondary air supply pipe that communicates with the exhaust cylinder and has an exhaust port at the upper end and supplies pressurized air into the cylinder are arranged concentrically. A small-scale incinerator comprising a combustion cylinder forming a secondary combustion chamber; and the waste input port of the small-scale incinerator is provided such that the waste input port can be opened and closed, and the waste input port is closed. A small-scale incinerator with an outside air shut-off device is described which comprises an outside air shut-off device that can throw waste into the primary combustion chamber in the furnace. However, no measures have been taken against the environmental standards related to incineration of waste plastics (referring to the Ministry of the Environment's “Dioxin Countermeasures Law”).

また、特許文献２に記載の発明には、「一次燃焼室を形成する燃焼炉体の底部にロストルを設け、該燃焼炉体の一端側には焼却物投入口と焼却灰排出口とを設け、前記焼却物投入口と前記焼却灰排出口にそれぞれ密閉用扉を開閉自在に設けると共に前記焼却灰排出口の密閉用扉に燃焼空気供給調節口を設け、他方、前記燃焼炉体の他端閉塞側には前記一次燃焼室に連通して二次燃焼室を形成する燃焼筒と該燃焼筒に連通する排気筒を設け、前記燃焼筒には二次燃焼室に連通し燃焼ガスを昇温させると共に空気を供給する一対の昇温用バーナを対向配置して設け、前記燃焼筒と排気筒との連結部に網目部材を設けたこと」が記載されている。しかし、廃プラの焼却に関しての環境基準に対する対策は取られていない。 Further, the invention described in Patent Document 2 states that “a rooster is provided at the bottom of the combustion furnace body that forms the primary combustion chamber, and an incinerated product inlet and an incineration ash discharge port are provided at one end of the combustion furnace body. The incineration product inlet and the incineration ash discharge port are each provided with a sealing door that can be freely opened and closed, and the sealing door of the incineration ash discharge port is provided with a combustion air supply control port, while the other end of the combustion furnace body The closed side is provided with a combustion cylinder that communicates with the primary combustion chamber to form a secondary combustion chamber and an exhaust cylinder that communicates with the combustion cylinder, and the combustion cylinder communicates with the secondary combustion chamber to raise the temperature of the combustion gas. In addition, a pair of temperature raising burners for supplying air is provided so as to face each other, and a mesh member is provided at the connecting portion between the combustion cylinder and the exhaust cylinder. However, no measures have been taken against environmental standards for incineration of waste plastics.

また、特許文献３に記載の発明には、「上部にごみ投入口と煙突を有する縦型の焼却筒底部にロストルを設置し、焼却筒の中心にロストルを貫通して空気供給筒を起立し、空気供給筒の基端に送風機を接続するとともに空気供給筒の先端を閉じその周壁には多数の噴気口を形成し、さらに空気供給筒の外周をその外径より大きい金属製防護ネットで被覆するようにした」ことが記載されている。しかし、廃プラの焼却に関しての環境基準に対する対策は取られていない。 In addition, the invention described in Patent Document 3 states that “a rooster is installed at the bottom of a vertical incineration cylinder having a dust inlet and a chimney at the top, and an air supply cylinder is erected through the rooster at the center of the incineration cylinder. The blower is connected to the base end of the air supply tube, the tip of the air supply tube is closed, a large number of air holes are formed in the peripheral wall, and the outer periphery of the air supply tube is covered with a metal protective net larger than its outer diameter "I did it". However, no measures have been taken against environmental standards for incineration of waste plastics.

特開２００３−３１４８１０号公報（第２頁、右欄２８〜３８行目、及び図１〜図４）JP 2003-314810 A (second page, right column, lines 28 to 38, and FIGS. 1 to 4) 特開２０００−１８５３２号公報（第２頁、右欄３〜１３行目、及び図１〜図２）JP 2000-18532 A (page 2, right column, lines 3 to 13 and FIGS. 1 to 2) 特開平１０−１８５１５０号公報（第２頁、左欄２３〜２９行目、及び図１）Japanese Patent Laid-Open No. 10-185150 (second page, left column, lines 23 to 29, and FIG. 1)

ところで、廃棄物を焼却することによって、発生するダイオキシン類が人の生命及び健康に重大な影響を及ぼすおそれがあることから、ダイオキシン類による環境汚染の防止及びその除去のため「ダイオキシン類対策特別措置法（平成１１年法律第１０５号）」が制定され、小型焼却炉（焼却能力５０〜２００ｋｇ／ｈ）についてダイオキシン排出基準が制定された。 By the way, because dioxins generated by incineration of waste may have a serious impact on human life and health, special measures to prevent dioxins have been established to prevent and remove environmental pollution caused by dioxins. Law (No. 105 of 1999) ”was enacted, and dioxin emission standards were established for small incinerators (incineration capacity 50-200 kg / h).

その排出基準は、ダイオキシン濃度５ｎｇ‐ＴＥＱ／ｍ^３Ｎとなっている。 The emission standard is a dioxin concentration of 5 ng-TEQ / m ³ N.

さらに、環境省は、前記「ダイオキシン類対策特別措置法」を踏まえて「廃棄物の処理及び清掃に関する法律施行規則（昭和４６年厚生省令第３５号）」の一部改正が平成１３年３月２６日付けで公布され、平成１４年１２月より施行されている。 In addition, the Ministry of the Environment, in March 2001, issued a partial revision of the “Enforcement Regulations on Law on Waste Disposal and Cleaning (Ministry of Health and Welfare No. 35 of 1971)” based on the “Dioxin Measures Special Measures Law”. It was promulgated on the 26th and has been in effect since December 2002.

その改正内容は、下記の通りである。
第一条の七
令第三条第二号イの環境省令で定める構造は、次の通りとする。 The amendments are as follows.
The structure specified by the Ordinance of the Ministry of the Environment of Article 1-7, Article 3, Item 2a is as follows.

１．空気取入口及び煙突の先端以外の焼却設備内と外気とが接触することなく、燃焼室において発生するガス（以下「燃焼ガス」という。）の温度が摂氏８００度以上の状態で廃棄物を焼却できるものであること。
２．焼却に必要な量の空気の通風が行われるものであること。
３．外気と遮断された状態で廃棄物を燃焼室に投入することができるものであること（ガス化燃焼方式のその他の構造上やむを得ないと認められる焼却設備の場合を除く。）。
４．燃焼中の燃焼ガスの温度を測定するための装置が設けられていること。
５．燃焼ガスの温度を保つために必要な助燃装置が設けられていること。 1. Waste is incinerated when the temperature of the gas generated in the combustion chamber (hereinafter referred to as “combustion gas”) is 800 degrees Celsius or higher without contact between the incineration facility other than the air intake and the tip of the chimney and the outside air. It must be possible.
2. The amount of air required for incineration shall be ventilated.
3. Waste must be able to be put into the combustion chamber in a state of being shut off from the outside air (except for incineration facilities that are recognized as unavoidable due to other structures of the gasification combustion method).
4). A device for measuring the temperature of combustion gas during combustion is provided.
5. The auxiliary combustion equipment necessary to maintain the temperature of the combustion gas is provided.

また、前記基準の焼却炉(平成１４年１２月施行の構造基準適合品)を使用して廃プラを焼却すると、以下のような問題点が指摘されている。すなわち、
１．廃プラは従来の焼却炉で燃焼を行うと、多量の黒煙と悪臭が発生するために燃焼させることができない。
２．この場合、燃焼時間が長く、その間の消費電力、灯油のランニングコストが嵩み実用的でない。従って、燃焼時間の短縮が求められている。
３．燃焼熱により液化した廃プラが焼却炉体内部、更には外部へ流れ出して自然冷却して固化してしまうと処理が容易でない。 In addition, the following problems have been pointed out when waste plastic is incinerated using the above-mentioned standard incinerator (structure standard compliant product enforced in December 2002). That is,
1. When waste plastic is burned in a conventional incinerator, a large amount of black smoke and foul odors are generated and cannot be burned.
2. In this case, the combustion time is long, the power consumption during that time, and the running cost of kerosene increase, which is not practical. Accordingly, there is a demand for shortening the combustion time.
3. When waste plastic liquefied by combustion heat flows out into the incinerator body and further to the outside and naturally cools and solidifies, it is not easy to process.

しかし、これらの問題点に対して、特許文献１〜３には、その解決策が示されていない。 However, the solutions to these problems are not shown in Patent Documents 1 to 3.

そこで、本発明は上記に鑑みてなされたもので、被燃焼物としての廃プラを焼却する焼却炉おいて、焼却の際、発生する多量の黒煙と悪臭を防ぎ、燃焼時間を短縮してランニングコストを下げ、しかも燃焼熱により液化した廃プラが焼却炉体内部で固化したり、更には外部へ流出しないように廃プラを完全燃焼することを課題とする。更に、当然ながら、「廃棄物の処理及び清掃に関する法律施行規則（昭和４６年厚生省令第３５号）」をクリアすることも課題である。 Therefore, the present invention has been made in view of the above, and in an incinerator for incinerating waste plastic as a combusted material, a large amount of black smoke and bad odor generated during incineration are prevented, and the combustion time is shortened. It is an object of the present invention to reduce the running cost and to completely burn the waste plastic so that the waste plastic liquefied by the combustion heat is solidified inside the incinerator body and does not flow outside. Furthermore, of course, clearing the “Enforcement Regulations on Waste Disposal and Cleaning (Ministry of Health and Welfare No. 35 of 1971)” is also an issue.

上記目的を達成するために、本発明の焼却炉においては、下記のような手段を取った。 In order to achieve the above object, the following measures were taken in the incinerator of the present invention.

請求項１記載の本発明は、被燃焼物を燃焼する一次燃焼室を形成する焼却炉体の下部にロストルを設け、該燃焼炉体には焼却物投入口と焼却灰排出口を設け、該焼却物投入口には投入口密閉扉を開閉自在に設け、該焼却灰排出口には排出口密閉扉を開閉自在に設け、前記燃焼炉体の上面には前記一次燃焼室に連通する排気筒を設け、該排気筒は二次燃焼室を形成すると共に上端部に排気口を有する燃焼炉であって、前記排気筒に一次燃焼室から流れてくる燃焼ガスを昇温させる一対の昇温用バーナーを斜め上方へ対向配置して設け、該一対の昇温用バーナーは、お互いに高低差をもって配置され、且つ該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流するように配置された、ことを特徴とする焼却炉である。 The present invention according to claim 1 provides a rooster at the lower part of an incinerator body that forms a primary combustion chamber for burning combustibles, the combustion furnace body is provided with an incinerator inlet and an incineration ash outlet, An incinerator inlet is provided with an inlet sealing door that can be opened and closed, an incineration ash outlet is provided with an outlet sealing door that can be opened and closed, and an exhaust pipe that communicates with the primary combustion chamber on the upper surface of the combustion furnace body. The exhaust cylinder forms a secondary combustion chamber and has an exhaust port at its upper end, and is a pair of temperature raising units that raise the temperature of the combustion gas flowing from the primary combustion chamber to the exhaust cylinder Burners are provided so as to face each other diagonally upward, and the pair of temperature raising burners are arranged with a difference in height from each other, and the flames of the pair of temperature raising burners circulate in a spiral shape in the exhaust pipe It is an incinerator characterized by being arranged in

請求項２記載の本発明は、被燃焼物を燃焼する一次燃焼室を形成する焼却炉体の下部にロストルを設け、該燃焼炉体には焼却物投入口と焼却灰排出口を設け、該焼却物投入口には投入口密閉扉を開閉自在に設け、該焼却灰排出口には排出口密閉扉を開閉自在に設け、前記燃焼炉体の上面には前記一次燃焼室に連通する排気筒を設け、該排気筒に連通して二次燃焼室を形成すると共に上端部に排気口を有する燃焼筒を設けた燃焼炉であって、前記排気筒に一次燃焼室から流れてくる燃焼ガスを昇温させる一対の昇温用バーナーを斜め上方へ対向配置して設け、該一対の昇温用バーナーは、お互いに高低差をもって配置され、且つ該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流するように配置された、ことを特徴とする焼却炉である。 The present invention according to claim 2 provides a rooster at the lower part of an incinerator body that forms a primary combustion chamber for burning combustibles, the combustion furnace body is provided with an incinerator inlet and an incineration ash outlet, An incinerator inlet is provided with an inlet sealing door that can be opened and closed, an incineration ash outlet is provided with an outlet sealing door that can be opened and closed, and an exhaust pipe that communicates with the primary combustion chamber on the upper surface of the combustion furnace body. A combustion furnace having a combustion cylinder having an exhaust port at the upper end and communicating with the exhaust cylinder, wherein the combustion gas flowing from the primary combustion chamber is introduced into the exhaust cylinder. A pair of temperature raising burners for raising the temperature is provided so as to face each other diagonally upward, the pair of temperature raising burners are arranged with a difference in elevation from each other, and the flame of the pair of temperature raising burners It is an incinerator characterized by being arranged so as to circulate in a spiral.

これは、本発明の請求項1及び請求項2の焼却炉によって、一対の昇温用バーナーをお互いに高低差をもって配置し、当該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流することによって、被燃焼物の完全燃焼を図ることができるようにしたものである。尚、当該被燃焼物には、廃プラ、木材、紙類、その他の廃棄物が含まれている。本発明の焼却炉は、被燃焼物として、特に廃プラの完全燃焼を図るようにしたものである。 This is because the incinerator according to claim 1 and claim 2 of the present invention arranges a pair of temperature raising burners with a difference in height from each other, and the flame of the pair of temperature raising burners spirals in the exhaust stack. In this way, complete combustion of the combusted material can be achieved. The combustibles include waste plastic, wood, paper, and other waste. The incinerator of the present invention is intended to achieve complete combustion of waste plastic as a combustible.

また、一対の昇温用バーナーをお互いに適正な距離の高低差をもって配置したことにより、廃プラを燃焼したときに発生する大量の黒煙と悪臭を除去することができるようになった。 In addition, by arranging the pair of temperature raising burners with a height difference of an appropriate distance from each other, it became possible to remove a large amount of black smoke and bad odor generated when burning waste plastic.

更に、本発明の請求項１では、一対の昇温用バーナーをお互いに適正な距離の高低差をもって配置したことにより二次燃焼室の高温容積が大きくなり、当該二次燃焼室内にて黒煙及び悪臭の原因となる化学物質を分解し排気口からの排ガス中からは当該化学物質が除去されるようになった。また、本発明の請求項２では、排気筒と燃焼筒とを連通することにより、当該排気筒と燃焼筒とは一体となり実質的な二次燃焼室の容積が更に大きくなるので、当該二次燃焼室内にて黒煙及び悪臭の原因となる化学物質を分解し排気口からの排ガス中からは当該化学物質が除去されるようになった。 Further, in the first aspect of the present invention, the pair of temperature raising burners are arranged with a difference in height from each other at an appropriate distance, whereby the high-temperature volume of the secondary combustion chamber is increased, and black smoke is generated in the secondary combustion chamber. In addition, the chemical substance causing the bad odor is decomposed and the chemical substance is removed from the exhaust gas from the exhaust port. Further, according to the second aspect of the present invention, the exhaust cylinder and the combustion cylinder are integrated with each other so that the substantial volume of the secondary combustion chamber is further increased. Chemical substances that cause black smoke and offensive odor are decomposed in the combustion chamber, and the chemical substances are removed from the exhaust gas from the exhaust port.

請求項３記載の本発明は、請求項１又は２に記載の焼却炉であって、前記焼却炉体には、焼却炉体の下部に設けたロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設けた、ことを特徴とする焼却炉である。 A third aspect of the present invention is the incinerator according to the first or second aspect, wherein the incinerator body has an upper surface position of a rooster provided at a lower portion of the incinerator body, and an inner surface of the incinerator body. An incinerator characterized in that a step which is inclined obliquely downward is provided inside the incinerator body.

これは、本発明の焼却炉によって、一対の昇温用バーナーをお互いに高低差をもって配置し、当該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流することによって、被燃焼物の完全燃焼を図ることができるようにしたものである。尚、当該被燃焼物には、廃プラ、木材、紙類、その他の廃棄物が含まれている。本発明の焼却炉は、被燃焼物として、特に廃プラの完全燃焼を図るようにしたものである。 This is because the incinerator according to the present invention arranges a pair of temperature raising burners with a difference in height from each other, and the flame of the pair of temperature raising burners circulates in an exhaust tube in a spiral shape to be burned. It is intended to achieve complete combustion of the object. The combustibles include waste plastic, wood, paper, and other waste. The incinerator of the present invention is intended to achieve complete combustion of waste plastic as a combustible.

更に、請求項1を前提とする焼却炉においては、一対の昇温用バーナーをお互いに適正な距離の高低差をもって配置したことにより二次燃焼室の高温容積が大きくなり、当該二次燃焼室内にて黒煙及び悪臭の原因となる化学物質を分解し排気口からの排ガス中からは当該化学物質が除去されるようになった。また、請求項２を前提とする焼却炉においては、排気筒と燃焼筒とを連通することにより、当該排気筒と燃焼筒とは一体となり実質的な二次燃焼室の容積が更に大きくなるので、当該二次燃焼室内にて黒煙及び悪臭の原因となる化学物質を分解し排気口からの排ガス中からは当該化学物質が除去されるようになった。 Furthermore, in the incinerator premised on claim 1, the high-temperature volume of the secondary combustion chamber is increased by arranging the pair of temperature raising burners with a height difference of an appropriate distance from each other. The chemical substances that cause black smoke and offensive odor are decomposed and the chemical substances are removed from the exhaust gas from the exhaust port. Further, in the incinerator premised on claim 2, by connecting the exhaust pipe and the combustion cylinder, the exhaust pipe and the combustion cylinder are integrated, and the volume of the substantial secondary combustion chamber is further increased. In the secondary combustion chamber, the chemical substances causing black smoke and offensive odor are decomposed, and the chemical substances are removed from the exhaust gas from the exhaust port.

また、本発明の焼却炉によって、ロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設けたことにより、焼却炉体内部では燃えながら液化した廃プラを当該段差で受け止めて流出を回避すると共に、傾斜した段差から燃えながら流れ落ちた液化した廃プラは、焼却炉体内部の底面に載置された灰受箱に滞留しながら燃焼することによって完全燃焼するようにしたものである。すなわち、焼却炉体内部で燃焼し、灰受箱で燃焼するという二重燃焼方式である。尚、液化した廃プラには、不完全燃焼の他の被燃焼物も含まれている場合もある。 In addition, by the incinerator of the present invention, by providing the inner surface of the incinerator body with a step inclined obliquely downward to the inside of the incinerator body, the waste that has been liquefied while burning inside the incinerator body. The plastic is received at the level difference to avoid outflow, and the liquefied waste plastic that has flowed down while burning from the inclined level is completely burned while staying in the ash receiving box placed on the bottom inside the incinerator body. It is designed to burn. That is, it is a double combustion system in which combustion is performed inside the incinerator body and combustion is performed in an ash receiving box. In addition, the liquefied waste plastic may contain other incombustible combustibles.

請求項４記載の本発明では、被燃焼物を燃焼する一次燃焼室を形成する焼却炉体の下部にロストルを設け、該燃焼炉体には焼却物投入口と焼却灰排出口を設け、該焼却物投入口には投入口密閉扉を開閉自在に設け、該焼却灰排出口には排出口密閉扉を開閉自在に設け、前記燃焼炉体の上面には前記一次燃焼室に連通する排気筒を設け、該排気筒は二次燃焼室を形成すると共に上端部に排気口を有する焼却炉であって、前記排気筒に一次燃焼室から流れてくる燃焼ガスを昇温させる一対の昇温用バーナーを斜め上方へ対向配置して設け、該一対の昇温用バーナーは、お互いに高低差をもって配置され、且つ該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流するように配置され、前記焼却炉体には、焼却炉体の下部に設けたロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設け、前記焼却炉には、ロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設けたことにより、焼却炉体内部では燃えながら液化した廃プラ若しくは該廃プラを含んだ他の不完全燃焼の被燃焼物を当該段差で受け止めて流出を回避すると共に、傾斜した段差から燃えながら流れ落ちた液化した廃プラ若しくは該廃プラを含んだ他の不完全燃焼の被燃焼物は、焼却炉体内部の底面に載置された灰受箱に滞留しながら燃焼することによって完全燃焼するようにしたことにより、該焼却炉体内部で燃焼し、該灰受箱で燃焼するという二段燃焼方式である、ことを特徴とする焼却炉である。 In the present invention as defined in claim 4 , a rooster is provided in the lower part of the incinerator body forming the primary combustion chamber for burning the combusted material, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, An incinerator inlet is provided with an inlet sealing door that can be opened and closed, an incineration ash outlet is provided with an outlet sealing door that can be opened and closed, and an exhaust pipe that communicates with the primary combustion chamber on the upper surface of the combustion furnace body. The exhaust cylinder forms a secondary combustion chamber and has an exhaust port at the upper end, and is a pair of temperature raising units that raise the temperature of combustion gas flowing from the primary combustion chamber to the exhaust cylinder Burners are provided so as to face each other diagonally upward, and the pair of temperature raising burners are arranged with a difference in height from each other, and the flames of the pair of temperature raising burners circulate in a spiral shape in the exhaust pipe The incinerator body includes a rooster provided at the lower part of the incinerator body. At the surface position, a step is formed on the inner surface of the incinerator body which is inclined obliquely downward to the inside of the incinerator body, and the incinerator has an inner surface of the incinerator body at the upper surface position of the rooster. By providing a step inclined obliquely downward, the waste plastic liquefied while burning in the incinerator body or other incompletely combusted material containing the waste plastic is received at the step to avoid outflow. At the same time, liquefied waste plastic that has flowed down while burning from an inclined step or other incompletely combusted combustible containing the waste plastic stays in an ash receiving box placed on the bottom surface inside the incinerator. It is an incinerator characterized in that it is a two-stage combustion system in which it burns in the incinerator body and burns in the ash receiving box by being burned completely .

請求項５記載の本発明では、被燃焼物を燃焼する一次燃焼室を形成する焼却炉体の下部にロストルを設け、該燃焼炉体には焼却物投入口と焼却灰排出口を設け、該焼却物投入口には投入口密閉扉を開閉自在に設け、該焼却灰排出口には排出口密閉扉を開閉自在に設け、前記燃焼炉体の上面には前記一次燃焼室に連通する排気筒を設け、該排気筒に連通して二次燃焼室を形成すると共に上端部に排気口を有する燃焼筒を設けた焼却炉であって、前記排気筒に一次燃焼室から流れてくる燃焼ガスを昇温させる一対の昇温用バーナーを斜め上方へ対向配置して設け、該一対の昇温用バーナーは、お互いに高低差をもって配置され、且つ該一対の昇温用バーナーの火炎が排気筒の中を渦巻状に回流するように配置され、前記焼却炉体には、焼却炉体の下部に設けたロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設け、前記焼却炉には、ロストルの上面位置に、焼却炉体の内面に該焼却炉体の内側へ斜め下方に傾斜した段差を設けたことにより、焼却炉体内部では燃えながら液化した廃プラ若しくは該廃プラを含んだ他の不完全燃焼の被燃焼物を当該段差で受け止めて流出を回避すると共に、傾斜した段差から燃えながら流れ落ちた液化した廃プラ若しくは該廃プラを含んだ他の不完全燃焼の被燃焼物は、焼却炉体内部の底面に載置された灰受箱に滞留しながら燃焼することによって完全燃焼するようにしたことにより、該焼却炉体内部で燃焼し、該灰受箱で燃焼するという二段燃焼方式である、ことを特徴とする焼却炉である。 In the present invention of claim 5, a rooster is provided in the lower part of the incinerator body forming the primary combustion chamber for burning the combusted material, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, An incinerator inlet is provided with an inlet sealing door that can be opened and closed, an incineration ash outlet is provided with an outlet sealing door that can be opened and closed, and an exhaust pipe that communicates with the primary combustion chamber on the upper surface of the combustion furnace body. An incinerator in which a secondary combustion chamber is formed in communication with the exhaust cylinder and a combustion cylinder having an exhaust port at the upper end is provided, and the combustion gas flowing from the primary combustion chamber is introduced into the exhaust cylinder. A pair of temperature raising burners for raising the temperature is provided so as to face each other diagonally upward, the pair of temperature raising burners are arranged with a difference in elevation from each other, and the flame of the pair of temperature raising burners The incinerator body is arranged so as to circulate in a spiral shape. A step is formed on the inner surface of the incinerator body, which is inclined obliquely downward to the inside of the incinerator body, at the upper surface position of the rooster at the upper surface position of the rooster. By providing a step which is inclined obliquely downward to the inside of the incinerator body, waste plastic that is liquefied while burning inside the incinerator body or other incompletely combusted combustibles containing the waste plastic at the step is provided. The liquefied waste plastic that flowed down while burning from an inclined step, and other incompletely combusted combustibles containing the waste plastic, are ash placed on the bottom inside the incinerator body. An incinerator characterized by having a two-stage combustion method in which it burns inside the incinerator body and burns in the ash receiving box by being burned completely while burning in the receiving box. It is.

本発明は、以上の説明から、以下に記載されるような効果を奏する。 The present invention has the following effects from the above description.

本発明の焼却炉は、排気筒内に一対の昇温用バーナーをお互いに高低差をもって配置したことにより、被燃焼物としての廃プラが燃焼時に発生する黒煙及び悪臭を抑制することができるようになり、また、燃焼時間を短縮することができ、且つ、完全燃焼することができるようになった。 The incinerator of the present invention can suppress black smoke and bad odor generated during combustion of waste plastic as a combustible material by arranging a pair of temperature raising burners in the exhaust stack with a difference in height from each other. In addition, the combustion time can be shortened and complete combustion can be performed.

また、本発明の焼却炉は、焼却炉体内側壁に設けた段差、及び焼却炉体の底面に載置した引出式の灰受箱を設けたことにより、被燃焼物を燃焼した際に、焼却炉体内のロストル上部において、燃焼による発生熱により液化した一部廃プラは、当該段差を燃えながら流れ落ち、ロストルを通過して当該灰受箱内にて燃焼を続けることにより完全燃焼し、且つ、焼却炉体内で液化した廃プラが焼却炉体外へ流出することを防止することができるようになった。また、灰受箱は引出式のため焼却灰の取り出しが容易に行うことができるようになった。 Further, the incinerator of the present invention is provided with a step provided on the side wall of the incinerator body and a drawer type ash receiving box placed on the bottom surface of the incinerator body, so that the incinerator is incinerated when combusted material is burned. In the upper part of the rooster in the furnace, the partially waste plastic liquefied by the heat generated by the combustion flows down while burning the step, passes through the rooster and continues to burn in the ash receiving box, and completely burns, and The waste plastic liquefied in the incinerator can be prevented from flowing out of the incinerator. In addition, the ash receiving box is a pull-out type so that the incineration ash can be easily taken out.

更に、環環省の「ダイオキシン類対策特別措置法」の排出ガス中に含まれるダイオキシン類の排出基準値の濃度を大幅に削減することができるようになった。 In addition, the concentration of emission standard values of dioxins contained in the exhaust gas of the Ministry of the Environment's “Special Measures for Countermeasures against Dioxins” can be greatly reduced.

以下に、本発明の実施をするための最良の形態を図面に基づいて説明する。 The best mode for carrying out the present invention will be described below with reference to the drawings.

図１は、本発明の焼却炉の一実施例の正面図である。図２は、本発明の焼却炉の側面図の断面図である。図３は、本発明の焼却炉の昇温用バーナーを説明ずるためのＡ−Ａ断面図である。図４は、本発明の焼却炉の焼却炉体の段差を説明するためのＢ−Ｂ断面図である。図５は、昇温用バーナーのバーナー防護カバーを説明するための部分図である。 FIG. 1 is a front view of an embodiment of the incinerator of the present invention. FIG. 2 is a cross-sectional view of a side view of the incinerator of the present invention. FIG. 3 is an AA cross-sectional view for explaining a temperature raising burner of the incinerator of the present invention. FIG. 4 is a BB cross-sectional view for explaining the level difference of the incinerator body of the incinerator of the present invention. FIG. 5 is a partial view for explaining the burner protective cover of the temperature raising burner.

次に、図１〜図４により一実施例を説明する。本発明の焼却炉の基本構成について、主に図１及び図２に基づいて説明する。図示するように、被燃焼物を燃焼する一次燃焼室２１を形成する焼却炉体２の下部にロストル２２を設け、該燃焼炉体２には焼却物投入口２３と焼却灰排出口２４を設け、該焼却物投入口２３には投入口密閉扉２５を開閉自在に設け、該焼却灰排出口２４には排出口密閉扉２６を開閉自在に設け、前記燃焼炉体２の上面には前記一次燃焼室２１に連通する排気筒３を設け、該排気筒３に連通して二次燃焼室４１を形成すると共に上端部に排気口４２を有する燃焼筒４を設けた焼却炉１である。また、図１及び図２の焼却炉１では、焼却物投入口２３に、外気遮断投入装置５を取付けた焼却炉１である。勿論、当該外気遮断投入装置５を取付けずに、焼却物投入口２３に投入口密閉扉２５を開閉自在に設けて良い。 Next, an embodiment will be described with reference to FIGS. The basic configuration of the incinerator of the present invention will be described mainly based on FIGS. 1 and 2. As shown in the figure, a rooster 22 is provided at the lower part of the incinerator body 2 forming the primary combustion chamber 21 for burning the combustibles, and the incinerator inlet 23 and the incineration ash outlet 24 are provided in the combustion furnace body 2. The incinerated material inlet 23 is provided with an inlet sealing door 25 that can be opened and closed, the incineration ash outlet 24 is provided with an outlet sealing door 26 that can be opened and closed, and the upper surface of the combustion furnace body 2 has the primary. The incinerator 1 is provided with an exhaust cylinder 3 communicating with a combustion chamber 21, forming a secondary combustion chamber 41 communicating with the exhaust cylinder 3 and having a combustion cylinder 4 having an exhaust port 42 at the upper end. Moreover, in the incinerator 1 of FIG.1 and FIG.2, it is the incinerator 1 which attached the external air interruption | blocking injection | throwing-in apparatus 5 to the incinerator input port 23. FIG. Of course, the inlet sealing door 25 may be provided at the incinerator inlet 23 so as to be openable and closable without attaching the outside air shutoff inlet 5.

次に、図１及び図２では、前記燃焼炉体２の上面には排気筒３を設け、該排気筒３の上部に燃焼筒４を設けて、当該燃焼筒４に二次燃焼室４１を形成し上端部に排気口４２を有する構造としているが、当該排気筒３に二次燃焼室４１を形成し上端部に排気口４２を設けても良い。すなわち、図１及び図２では、排気筒３と燃焼筒４とにそれぞれフランジを介して複数のボルトとナットで連結しているが、燃焼筒４を廃止し、排気筒３に二次燃焼室４１を形成し上端部に排気口４２を設けても良いのである。尚、排気筒３と燃焼筒４とを連結した構造のときには、二次燃焼室４１は、当該排気筒３と燃焼筒４とは連通しているので排気筒３にも形成されたことになる。 Next, in FIGS. 1 and 2, an exhaust cylinder 3 is provided on the upper surface of the combustion furnace body 2, a combustion cylinder 4 is provided on the upper part of the exhaust cylinder 3, and a secondary combustion chamber 41 is provided in the combustion cylinder 4. However, the secondary combustion chamber 41 may be formed in the exhaust cylinder 3 and the exhaust port 42 may be provided in the upper end portion. That is, in FIGS. 1 and 2, the exhaust cylinder 3 and the combustion cylinder 4 are connected to each other by a plurality of bolts and nuts via flanges, but the combustion cylinder 4 is eliminated and the exhaust cylinder 3 is connected to the secondary combustion chamber. 41 may be formed and an exhaust port 42 may be provided at the upper end. When the exhaust cylinder 3 and the combustion cylinder 4 are connected, the secondary combustion chamber 41 is also formed in the exhaust cylinder 3 because the exhaust cylinder 3 and the combustion cylinder 4 communicate with each other. .

また、燃焼筒４内には、二次燃焼室４１内に加圧空気を供給する二次空気供給管４３が該燃焼筒４と同心に配置され、下端を排気筒３内にのぞませている。尚、前記で説明した燃焼筒４を廃止し、排気筒３に二次燃焼室４１を形成し上端部に排気口４２を設けた焼却炉１においては、排気筒３内に、二次燃焼室４１内に加圧空気を供給する二次空気供給管４３が該排気筒３と同心に配置されている。 Further, in the combustion cylinder 4, a secondary air supply pipe 43 for supplying pressurized air into the secondary combustion chamber 41 is disposed concentrically with the combustion cylinder 4, and the lower end is looked into the exhaust cylinder 3. Yes. In the incinerator 1 in which the combustion cylinder 4 described above is eliminated, the secondary combustion chamber 41 is formed in the exhaust cylinder 3 and the exhaust port 42 is provided in the upper end portion, the secondary combustion chamber is provided in the exhaust cylinder 3. A secondary air supply pipe 43 that supplies pressurized air into 41 is disposed concentrically with the exhaust cylinder 3.

また、該二次空気供給管４３の下端面は閉塞されており、周壁には多数の空気噴射孔４４が穿設されている。これら空気噴射孔４４は、二次空気供給管４３の上半分を適宜な孔径に設定するとともに下半分を前記上半分の孔径に対し若干大きめに設定している。前記空気噴射孔４４は、上から見て渦巻き方向に噴射するよう設けられている。これにより、サイクロン効果でクリーンな燃焼ができ、さらに煤塵の発生及び排出を少なくできる。また、二次空気供給管４３の上端は、二次空気送風管４５を介してブロワー４６に連通されている。 The lower end surface of the secondary air supply pipe 43 is closed, and a number of air injection holes 44 are formed in the peripheral wall. These air injection holes 44 are set such that the upper half of the secondary air supply pipe 43 has an appropriate hole diameter and the lower half is set slightly larger than the hole diameter of the upper half. The air injection hole 44 is provided so as to inject in a spiral direction when viewed from above. Thereby, clean combustion can be performed by the cyclone effect, and generation and discharge of dust can be reduced. The upper end of the secondary air supply pipe 43 communicates with the blower 46 via the secondary air blower pipe 45.

すなわち、ブロワー４６から二次空気送風管４５を経て二次空気供給管４３に送給される空気は、空気噴射孔４４を通して燃焼筒４内に噴射される。したがって、その送風量は二次空気供給管４３の下端に近づくほど減少するため、これを二次空気供給管４３の長手軸方向に対して均等に放出させようとすれば、下半分に穿設する空気噴射孔４４の孔径を上半分に穿設した孔径より若干大きめにしなければならない。 That is, the air fed from the blower 46 to the secondary air supply pipe 43 through the secondary air blower pipe 45 is injected into the combustion cylinder 4 through the air injection hole 44. Therefore, since the air flow decreases as it approaches the lower end of the secondary air supply pipe 43, if it is to be discharged evenly with respect to the longitudinal axis direction of the secondary air supply pipe 43, it is drilled in the lower half. The diameter of the air injection hole 44 to be made must be slightly larger than the diameter of the hole formed in the upper half.

また、前記焼却物投入口２３には、外気遮断投入装置５が設けられている。当該焼却物投入口２３には、投入口密閉扉２５が設けられている。当該投入口密閉扉２５は、外気との遮断をするもので、焼却炉体２内部と外気とが接することなく、焼却炉体２内部において発生するガスの温度が摂氏８００度以上の状態で被燃焼物を焼却できるようにしたものである。すなわち、外気遮断投入装置５は、ダイオキシン類対策特別措置法に基づく規制をクリアするものである。 In addition, an outside air blocking charging device 5 is provided at the incinerated material charging port 23. The incineration material inlet 23 is provided with an inlet sealing door 25. The inlet sealing door 25 is a shield from the outside air, so that the inside of the incinerator body 2 and the outside air are not in contact with each other, and the temperature of the gas generated in the incinerator body 2 is 800 degrees Celsius or higher. Combustibles can be incinerated. That is, the outside air shut-off device 5 clears the regulations based on the Dioxins Countermeasures Special Measures Law.

尚、その他の焼却炉１の基本構成及び外気遮断投入装置５の詳細については、同一出願人による特開２００３−３１４８１０号公報にて記載されている廃棄物焼却炉と同様のため、本明細書では省略する。 The other basic configurations of the incinerator 1 and the details of the outside air shutoff charging device 5 are the same as those of the waste incinerator described in JP 2003-314810 A by the same applicant. I will omit it.

以上は、焼却炉の一般的な構造を説明したが、次に、本発明の主要な構成である昇温用バーナー及び焼却炉体内部の段差について説明する。 The general structure of the incinerator has been described above. Next, the steps in the temperature rising burner and the incinerator body, which are the main components of the present invention, will be described.

まず、図１、図２．及び図３により昇温用バーナーについて説明する。当該一対の昇温用バーナー６、６は、前記排気筒３に一次燃焼室２１から流れてくる燃焼ガスを昇温させるもので、排気筒３に燃焼ガスが上方へ流れ易いように取付角度αで斜め上方へ対向配置して設け、お互いに鉛直方向の高低差ｈをもって配置され、且つ、該一対の昇温用バーナー６，６の火炎が排気筒３の中を渦巻状に回流するように配置されている。尚、当該高低差ｈは、排気筒３の上下全体で当該火炎が渦巻状に回流し易いようにしたものである。 First, FIG. The temperature raising burner will be described with reference to FIG. The pair of temperature raising burners 6 and 6 raise the temperature of the combustion gas flowing from the primary combustion chamber 21 to the exhaust pipe 3, and the mounting angle α is set so that the combustion gas easily flows upward into the exhaust pipe 3. So that the flames of the pair of temperature raising burners 6 and 6 circulate in a spiral shape in the exhaust tube 3. Has been placed. The height difference h is such that the flame easily circulates in a spiral shape across the entire top and bottom of the exhaust tube 3.

尚、上方角度αの適正角度は、実験によれば１０度が適正である。しかし、排気筒３の円筒直径等が上方角度αの適正に影響すると思われるので、１０度に限定されるものではない。また、当該火炎が排気筒３の中を渦巻状に回流するように、当該昇温用バーナー６は、排気筒３の中心に対して、当該中心からの離間距離βだけオフセットした状態で設置されている。尚、当該昇温用バーナー６の火炎は、図３では、反時計回りに回流している。これにより、サイクロン効果でクリーンな燃焼ができ、さらに煤塵の発生及び排出を少なくできる。 Note that an appropriate angle of the upper angle α is 10 degrees according to experiments. However, since it seems that the cylinder diameter of the exhaust tube 3 influences the upper angle α appropriately, it is not limited to 10 degrees. Also, the temperature raising burner 6 is installed in a state offset from the center of the exhaust tube 3 by a separation distance β from the center so that the flame circulates in a spiral shape in the exhaust tube 3. ing. In addition, the flame of the said temperature raising burner 6 is circulating counterclockwise in FIG. Thereby, clean combustion can be performed by the cyclone effect, and generation and discharge of dust can be reduced.

すなわち、図１及び図２の焼却炉１は、一対の昇温用バーナー６，６をお互いに高低差ｈをもって配置し、当該一対の昇温用バーナー６，６の火炎が排気筒３の中を渦巻状に回流することによって、被燃焼物の完全燃焼を図ることができる。尚、当該被燃焼物には、廃プラ、木材、紙類、その他の廃棄物が含まれているが、当該焼却炉１は、特に廃プラの完全燃焼を図るようにしたものである。 That is, in the incinerator 1 of FIGS. 1 and 2, a pair of temperature raising burners 6, 6 are arranged with a height difference h from each other, and the flame of the pair of temperature raising burners 6, 6 is in the exhaust tube 3. Can be burned in a spiral shape to achieve complete combustion of the combustible. In addition, although the said to-be-combusted material contains waste plastics, wood, paper, and other waste materials, the said incinerator 1 is intended to achieve complete combustion of waste plastics in particular.

また、排気筒３と燃焼筒４とを連通することにより、当該排気筒３と燃焼筒４とは一体となり実質的な二次燃焼室４１の容積が大きくなり、更に当該一対の昇温用バーナー６、６を鉛直方向に適正な高低差ｈを持たせて設置したことにより、実質的に二次燃焼室４１の高温容積が更に大きくなり、当該二次燃焼室４１にて黒煙及び悪臭の原因となる化学物質を充分に分解したことにより、排気口４２からの排ガス中からは当該黒煙及び悪臭を除去することができるようになった。尚、前記するように、図１及び図２と相違して、排気筒３のみで燃焼筒４がない場合でも、一対の昇温用バーナー６、６を鉛直方向に適正な高低差ｈを持たせて設置したことにより、二次燃焼室４１の有効な高温容積が大きくなり、当該二次燃焼室４１にて黒煙及び悪臭の原因となる化学物質を分解したことにより、排気口４２からの排ガス中からは当該黒煙及び悪臭を除去することができるようになった。 Further, by connecting the exhaust cylinder 3 and the combustion cylinder 4, the exhaust cylinder 3 and the combustion cylinder 4 are integrated to increase the substantial volume of the secondary combustion chamber 41, and the pair of temperature raising burners. 6 and 6 are installed with an appropriate height difference h in the vertical direction, the high-temperature volume of the secondary combustion chamber 41 is substantially further increased, and black smoke and bad odor are generated in the secondary combustion chamber 41. By sufficiently decomposing the causal chemical substance, the black smoke and bad odor can be removed from the exhaust gas from the exhaust port 42. As described above, unlike FIGS. 1 and 2, even when only the exhaust cylinder 3 is not provided and the combustion cylinder 4 is not provided, the pair of temperature raising burners 6 and 6 have an appropriate height difference h in the vertical direction. As a result, the effective high-temperature volume of the secondary combustion chamber 41 is increased, and the secondary combustion chamber 41 decomposes chemical substances that cause black smoke and offensive odor. The black smoke and offensive odor can be removed from the exhaust gas.

また、図１及び図３では、一対の昇温用バーナー６、６となっているが、２個の昇温用バーナー６、６に限定するものでは無く、複数個の昇温用バーナー６，６、…をそれぞれ高低差を持たせ、且つ排気筒３の中心からの離間距離βだけオフセットして設置しても良い。場合によっては、１個の昇温用バーナー６を設置しても良い。 1 and 3, a pair of temperature raising burners 6 and 6 are provided, but the present invention is not limited to the two temperature raising burners 6 and 6, and a plurality of temperature raising burners 6, 6,... May be provided with a height difference and offset by a separation distance β from the center of the exhaust tube 3. In some cases, one temperature raising burner 6 may be installed.

また、一対の昇温用バーナー６、６は、図１に示すように燃料供給管７１を介して燃料タンク７に連通されている。但し、図１では、右側の昇温用バーナー６は連通する燃料供給管７１の図示を省略している。更に、図５に示すように、当該一対の昇温用バーナー６、６には、一対のバーナー防護カバー６１、６１が取付けられている。当該一対のバーナー防護カバー６１、６１は、一対の昇温用バーナー６、６を防護すると共に、一対の昇温用バーナー６、６の温度測定用の計器類を外部より防護するものである。 Further, the pair of temperature raising burners 6 and 6 are communicated with the fuel tank 7 through a fuel supply pipe 71 as shown in FIG. However, in FIG. 1, the illustration of the fuel supply pipe 71 that communicates with the right temperature raising burner 6 is omitted. Further, as shown in FIG. 5, a pair of burner protective covers 61, 61 are attached to the pair of temperature raising burners 6, 6. The pair of burner protection covers 61 and 61 protect the pair of temperature raising burners 6 and 6 and protect the temperature measuring instruments of the pair of temperature raising burners 6 and 6 from the outside.

次に、図２及び図４により焼却炉体内に設けられた段差について説明する。図示するように、前記焼却炉体２には、焼却炉体２の下部に設けたロストル２２の上面位置に、焼却炉体２の内面に該焼却炉体２の内側へ斜め下方に傾斜した突起状の段差８を設けたものである。当該段差８は、当該焼却炉体２の内側へ斜め下方へ傾斜した傾斜面８１と該傾斜面８１の端部から下方への垂直面８２と該垂直面８２の下端から焼却炉体２の側壁への水平面８３とから形成されている。 Next, the steps provided in the incinerator will be described with reference to FIGS. As shown in the figure, the incinerator body 2 has a protrusion inclined obliquely downward to the inside of the incinerator body 2 on the inner surface of the incinerator body 2 at the upper surface position of the rooster 22 provided at the lower part of the incinerator body 2. A step 8 having a shape is provided. The step 8 includes an inclined surface 81 inclined obliquely downward to the inside of the incinerator body 2, a vertical surface 82 downward from the end of the inclined surface 81, and a side wall of the incinerator body 2 from the lower end of the vertical surface 82. And a horizontal plane 83.

すなわち、ロストル２２の上面位置に、焼却炉体２の内面に該焼却炉体２の内側へ斜め下方に傾斜した突起状の段差８を設けたことにより、焼却炉体２内部では燃えながら液化した廃プラを当該段差８で受け止めて流出を回避すると共に、傾斜した段差８から燃えながら流れ落ちた液化した廃プラは、焼却炉体２内部の底面に載置された灰受箱８４に滞留しながら燃焼することによって完全燃焼するようにしたものである。すなわち、焼却炉体２内部で燃焼し、灰受箱８４で燃焼するという二重燃焼方式である。尚、液化した廃プラには、不完全燃焼の他の被燃焼物も含まれている場合もある。 That is, by providing a protruding step 8 inclined obliquely downward to the inside of the incinerator body 2 on the inner surface of the incinerator body 2 at the upper surface position of the rooster 22, the inside of the incinerator body 2 is liquefied while burning. The waste plastic is received at the step 8 to avoid outflow, and the liquefied waste plastic that has flowed down while burning from the inclined step 8 stays in the ash receiving box 84 placed on the bottom surface inside the incinerator body 2. It is designed to burn completely by burning. That is, it is a double combustion system in which combustion is performed in the incinerator body 2 and combustion is performed in the ash receiving box 84. In addition, the liquefied waste plastic may contain other incombustible combustibles.

また、当該段差８を焼却炉体２内部において焼却炉体２内の側壁を伝わる液化した廃プラが灰受箱８４内へ流れ込むように当該側壁の内周に水平方向直線状の突起とし、更に焼却炉体２の底面に灰受箱８４を載置したことにより、当該段差８により燃焼熱により液化した廃プラが焼却炉体２内部及び外部へ流出することを回避することができ、及び灰受箱８４により焼却灰の取り出しを容易にすることができるようになった。 Further, the stepped portion 8 is formed as a horizontal linear protrusion on the inner periphery of the side wall so that the liquefied waste plastic transmitted through the side wall in the incinerator body 2 flows into the ash receiving box 84 inside the incinerator body 2. By placing the ash receiving box 84 on the bottom surface of the incinerator body 2, waste plastic liquefied by the combustion heat due to the step 8 can be prevented from flowing out into and out of the incinerator body 2, and ash The receiving box 84 can easily remove the incineration ash.

次に、図１及び図２により、排出口密閉扉及び外気調節扉について説明する。図示するように、焼却炉体２の下部に設けられた焼却灰排出口２４に排出口密閉扉２６が開閉自在に設けられている。当該排出口密閉扉２６には、燃焼空気供給調節口２６１が設けられ、当該燃焼空気供給調節口２６１には外気調節扉２６２が開閉自在に設けられている。当該開閉自在は、ヒンジによる開閉、摺動式による開閉等考えられるが、いずれの方式にも限定されるものではない。 Next, the discharge port sealing door and the outside air adjustment door will be described with reference to FIGS. As shown in the figure, a discharge port sealing door 26 is provided at an incineration ash discharge port 24 provided at the lower part of the incinerator body 2 so as to be freely opened and closed. The discharge airtight door 26 is provided with a combustion air supply adjustment port 261, and the combustion air supply adjustment port 261 is provided with an open air adjustment door 262 that can be opened and closed. The open / close freely is conceivable, such as opening / closing by a hinge, sliding opening / closing, etc., but is not limited to any method.

また、燃焼の当初は、焼却炉体２前面に設けた当該排出口密閉扉２６は閉じた状態で、しかも当該外気調節扉２６２は、閉じた状態で燃焼を開始し、一定の時間が経過し、燃焼が継続し焼却炉体２の温度が上昇し安定してから当該外気調節扉２６２を開口し、燃焼空気供給調節口２６１より適切量の外気を供給すると良い。すなわち、燃焼が継続し焼却炉体２の温度が上昇し安定してから当該燃焼空気供給調節口２６１を開口して、廃プラに必要最小限かつ微量な空気を加えて燃焼を継続させることにより、完全燃焼が図れる。また、一対の昇温用バーナー６，６を高低差ｈを設けて設置したことにより二次燃焼室４１の容積が大きくなり、燃焼空気供給調節口２６１を全開にしても黒煙や悪臭は発生しなくなり空気量を多く与えることにより燃焼時間を早めることができるようになった。実験によれば、燃焼時間３０分後より当該外気調節扉２６２を開くと、トータルの燃焼時間を短縮することができるとともに、完全燃焼が図れる。 Further, at the beginning of combustion, combustion is started in a state in which the discharge port sealing door 26 provided on the front surface of the incinerator body 2 is closed and the outside air adjustment door 262 is closed, and a certain time has elapsed. After the combustion continues and the temperature of the incinerator body 2 rises and stabilizes, it is preferable to open the outside air adjusting door 262 and supply an appropriate amount of outside air from the combustion air supply adjusting port 261. That is, after combustion continues and the temperature of the incinerator body 2 rises and stabilizes, the combustion air supply adjustment port 261 is opened, and the combustion is continued by adding a minimum amount of minute air to the waste plastic. , Complete combustion. In addition, by installing the pair of temperature raising burners 6 and 6 with a height difference h, the volume of the secondary combustion chamber 41 is increased, and black smoke and bad odor are generated even when the combustion air supply control port 261 is fully opened. The combustion time can be shortened by giving more air. According to experiments, when the outside air adjustment door 262 is opened after 30 minutes of combustion time, the total combustion time can be shortened and complete combustion can be achieved.

次に、燃焼の過程について説明する。被燃焼物としての廃プラは、焼却炉１の上部に設けられた開閉自在の投入口密閉扉２５を開き、被焼却物である廃プラ等を焼却物投入口２３より、焼却炉体２の中へ投入する。当該被燃焼物は、焼却炉体２の中の一次燃焼室２１で燃焼した後、焼却炉体２の内壁に設けられた突起状の段差８を伝わり、ロストル２２を通過して、当該ロストル２２の下側に載置された灰受箱８４に流れ落ちて燃焼を続ける。これは、被燃焼物としての廃プラが一次燃焼室２１にて液化して流動して下方へ流れ落ちたものを、更に燃焼させることにより完全燃焼を図るものである。更に、当該液化した廃プラが焼却炉体２の炉外ヘ流出するのを防ぐ効果がある。従来の段差のない焼却炉では液化した廃プラが焼却炉体２外へ流出していたものを、灰受箱８４で再度燃焼することが出来るとともに、完全燃焼することができるようになった。また、焼却炉体２の底面に載置された引出式の灰受箱８４を容易に取り出すことができるので、焼却灰の処理が容易にできるようになった。尚、廃プラを燃焼する際には、図２の焼却炉体２外の左側に設けられたブロワー４６の下側に位置する一次空気送風管からの送風空気は、バルブを閉じて焼却炉体２内へ供給されないが、他の一般の被燃焼物を燃焼する際には、当該バルブを開けて焼却炉体２内へ供給する。 Next, the combustion process will be described. The waste plastic as the combusted material is opened at the openable / closable inlet sealing door 25 provided at the top of the incinerator 1, and the waste plastic or the like that is the incinerated material is disposed in the incinerator body 2 from the incinerated material inlet 23. Throw in. The combusted material burns in the primary combustion chamber 21 in the incinerator body 2, then travels along the protruding step 8 provided on the inner wall of the incinerator body 2, passes through the rooster 22, and passes through the rooster 22. The fuel flows down to the ash receiving box 84 placed on the lower side and continues to burn. This is intended to achieve complete combustion by further combusting the waste plastic as a combusted material that liquefies and flows in the primary combustion chamber 21 and flows downward. Furthermore, there is an effect of preventing the liquefied waste plastic from flowing out of the incinerator body 2. In a conventional incinerator having no level difference, liquefied waste plastic that has flowed out of the incinerator body 2 can be burned again in the ash receiving box 84 and can be completely burned. Moreover, since the drawer-type ash receiving box 84 placed on the bottom surface of the incinerator body 2 can be easily taken out, the incineration ash can be easily treated. When the waste plastic is burned, the blown air from the primary air blowing pipe located below the blower 46 provided on the left side outside the incinerator body 2 in FIG. Although not supplied into the combustion chamber 2, when burning other general combustibles, the valve is opened and fed into the incinerator body 2.

次に、一次燃焼室２１で燃焼した被燃焼物は、排気筒３に設けられた昇温用バーナー６，６にて、被燃焼物の燃焼ガスを昇温させて、当該燃焼ガスが燃焼筒４へ流れる。当該燃焼ガスは、焼却灰の二次燃焼室４１にて二次空気供給管４３に設けられた空気噴射口４４より噴射された空気により完全燃焼し、当該燃焼ガスは、燃焼炉１の上部に設けられた排気口４２により外部へ流出する。当該外部へ流出した燃焼ガスは、ダイオキシン等の有害物質を含まないクリーンな状態のガスで、ダイオキシン等の排出基準に合致したものとなっている。 Next, the combusted material combusted in the primary combustion chamber 21 raises the temperature of the combustion gas of the combusted material at the temperature raising burners 6 and 6 provided in the exhaust cylinder 3, and the combustion gas is combusted into the combustion cylinder. It flows to 4. The combustion gas is completely combusted by the air injected from the air injection port 44 provided in the secondary air supply pipe 43 in the secondary combustion chamber 41 of the incinerated ash, and the combustion gas is in the upper part of the combustion furnace 1. It flows out to the outside through the exhaust port 42 provided. The combustion gas that has flowed to the outside is a clean gas that does not contain harmful substances such as dioxins, and meets the emission standards for dioxins.

前記図１〜図４をまとめると、本発明の焼却炉１は、被燃焼物を燃焼する一次燃焼室２１を形成する焼却炉体２の下部にロストル２２を設け、該燃焼炉体２には焼却物投入口２３と焼却灰排出口２４を設け、該焼却物投入口２３には投入口密閉扉２５を開閉自在に設け、該焼却灰排出口２４には排出口密閉扉２６を開閉自在に設け、前記燃焼炉体２の上面には前記一次燃焼室に連通する排気筒３を設け、該排気筒３は二次燃焼室４１を形成すると共に上端部に排気口４２を有する焼却炉１であって、前記排気筒３に一次燃焼室２１から流れてくる燃焼ガスを昇温させる一対の昇温用バーナー６，６を斜め上方へ対向配置して設け、該一対の昇温用バーナー６，６は、お互いに高低差をもって配置され、且つ該一対の昇温用バーナー６，６の火炎が排気筒３の中を渦巻状に回流するように配置された、ことを特徴とするものである。 1 to 4, the incinerator 1 of the present invention is provided with a rooster 22 at the lower part of an incinerator body 2 that forms a primary combustion chamber 21 for combusting combustibles. An incineration material inlet 23 and an incineration ash discharge port 24 are provided, and an incineration material inlet 23 is provided with an input port sealing door 25 that can be opened and closed. The incineration ash discharge port 24 is openable and closable with a discharge port sealing door 26. An exhaust cylinder 3 communicating with the primary combustion chamber is provided on the upper surface of the combustion furnace body 2, and the exhaust cylinder 3 forms a secondary combustion chamber 41 and has an exhaust port 42 at the upper end. A pair of temperature raising burners 6 and 6 for raising the temperature of the combustion gas flowing from the primary combustion chamber 21 are provided in the exhaust tube 3 so as to face each other diagonally upward, and the pair of temperature raising burners 6 and 6 are provided. 6 are arranged with a difference in height from each other, and the fires of the pair of heating burners 6 and 6 are There is arranged to circumfluence through the stack 3 in a spiral shape, it is characterized in.

また、本発明の焼却炉１は、被燃焼物を燃焼する一次燃焼室２１を形成する焼却炉体２の下部にロストル２２を設け、該燃焼炉体２には焼却物投入口２３と焼却灰排出口２４を設け、該焼却物投入口２３には投入口密閉扉２５を開閉自在に設け、該焼却灰排出口２４には排出口密閉扉２６を開閉自在に設け、前記燃焼炉体２の上面には前記一次燃焼室２１に連通する排気筒３を設け、該排気筒３に連通して二次燃焼室４１を形成すると共に上端部に排気口４２を有する燃焼筒４を設けた焼却炉１であって、前記排気筒３に一次燃焼室２１から流れてくる燃焼ガスを昇温させる一対の昇温用バーナー６，６を斜め上方へ対向配置して設け、該一対の昇温用バーナー６，６は、お互いに高低差をもって配置され、且つ該一対の昇温用バーナー６，６の火炎が排気筒３の中を渦巻状に回流するように配置された、ことを特徴とするものである。 Further, the incinerator 1 of the present invention is provided with a rooster 22 at the lower part of an incinerator body 2 forming a primary combustion chamber 21 for combusting combustibles, and the incinerator inlet 23 and incineration ash are provided in the incinerator body 2. A discharge port 24 is provided, and a closed door 25 is provided at the incinerated product input port 23 so as to be opened and closed. A closed discharge door 26 is provided at the incineration ash discharge port 24 so as to be opened and closed. An incinerator provided with an exhaust cylinder 3 communicating with the primary combustion chamber 21 on the upper surface, forming a secondary combustion chamber 41 communicating with the exhaust cylinder 3 and having an exhaust port 42 at the upper end. 1. A pair of temperature raising burners 6 and 6 for raising the temperature of the combustion gas flowing from the primary combustion chamber 21 are provided in the exhaust tube 3 so as to face each other diagonally upward, and the pair of temperature raising burners 6 and 6 are arranged with a height difference from each other, and the pair of temperature raising burners 6, Flame is positioned to circumfluence through the stack 3 in a spiral shape, it is characterized in.

また、本発明の焼却炉１は、被燃焼物を燃焼する一次燃焼室２１を形成する焼却炉体２の下部にロストル２２を設け、該燃焼炉体２には焼却物投入口２３と焼却灰排出口２４を設け、該焼却物投入口２３には投入口密閉扉２５を開閉自在に設け、該焼却灰排出口２４には排出口密閉扉２６を開閉自在に設け、前記燃焼炉体２の上面には前記一次燃焼室に連通する排気筒３を設け、該排気筒３は二次燃焼室４１を形成すると共に上端部に排気口４２を有する焼却炉１であって、前記焼却炉体２には、焼却炉体２の下部に設けたロストル２２の上面位置に、焼却炉体２の内面に該焼却炉体２の内側へ斜め下方に傾斜した突起状の段差８を設けた、ことを特徴とするものである。 Further, the incinerator 1 of the present invention is provided with a rooster 22 at the lower part of an incinerator body 2 forming a primary combustion chamber 21 for combusting combustibles, and the incinerator inlet 23 and incineration ash are provided in the incinerator body 2. A discharge port 24 is provided, and a closed door 25 is provided at the incinerated product input port 23 so as to be opened and closed. A closed discharge door 26 is provided at the incineration ash discharge port 24 so as to be opened and closed. An exhaust cylinder 3 communicating with the primary combustion chamber is provided on the upper surface, and the exhaust cylinder 3 is an incinerator 1 that forms a secondary combustion chamber 41 and has an exhaust port 42 at the upper end, and the incinerator body 2 Is provided with a protruding step 8 that is inclined obliquely downwardly toward the inside of the incinerator body 2 on the inner surface of the incinerator body 2 at the upper surface position of the rooster 22 provided at the lower part of the incinerator body 2. It is a feature.

また、本発明の焼却炉１は、被燃焼物を燃焼する一次燃焼室２１を形成する焼却炉体２の下部にロストル２２を設け、該燃焼炉体２には焼却物投入口２３と焼却灰排出口２４を設け、該焼却物投入口２３には投入口密閉扉２５を開閉自在に設け、該焼却灰排出口２４には排出口密閉扉２６を開閉自在に設け、前記燃焼炉体２の上面には前記一次燃焼室２１に連通する排気筒３を設け、該排気筒３に連通して二次燃焼室４１を形成すると共に上端部に排気口４２を有する燃焼筒４を設けた焼却炉１であって、前記焼却炉体２には、焼却炉体２の下部に設けたロストル２２の上面位置に、焼却炉体２の内面に該焼却炉体２の内側へ斜め下方に傾斜した突起状の段差８を設けた、ことを特徴とするものである。 Further, the incinerator 1 of the present invention is provided with a rooster 22 at the lower part of an incinerator body 2 forming a primary combustion chamber 21 for combusting combustibles, and the incinerator inlet 23 and incineration ash are provided in the incinerator body 2. A discharge port 24 is provided, and a closed door 25 is provided at the incinerated product input port 23 so as to be opened and closed. A closed discharge door 26 is provided at the incineration ash discharge port 24 so as to be opened and closed. An incinerator provided with an exhaust cylinder 3 communicating with the primary combustion chamber 21 on the upper surface, forming a secondary combustion chamber 41 communicating with the exhaust cylinder 3 and having an exhaust port 42 at the upper end. 1, the incinerator body 2 has a protrusion inclined at an upper surface of a rooster 22 provided at a lower portion of the incinerator body 2 and obliquely downward toward the inside of the incinerator body 2 on the inner surface of the incinerator body 2. In this case, a step 8 having a shape is provided.

また、本発明の焼却炉１は、前記排気筒３に一次燃焼室２１から流れてくる燃焼ガスを昇温させる一対の昇温用バーナー６，６を斜め上方へ対向配置して設け、該一対の昇温用バーナー６，６は、お互いに高低差をもって配置され、且つ該一対の昇温用バーナー６，６の火炎が排気筒３の中を渦巻状に回流するように配置されたものであって、且つ、前記焼却炉体２には、焼却炉体２の下部に設けたロストル２２の上面位置に、焼却炉体２の内面に該焼却炉体２の内側へ斜め下方に傾斜した突起状の段差８を設けた、ことを特徴とするものである。 Further, the incinerator 1 of the present invention is provided with a pair of temperature raising burners 6 and 6 for raising the temperature of the combustion gas flowing from the primary combustion chamber 21 in the exhaust tube 3 so as to face each other diagonally upward. The temperature raising burners 6 and 6 are arranged with a difference in height from each other, and the flames of the pair of temperature raising burners 6 and 6 are arranged so as to circulate in the exhaust tube 3 in a spiral shape. In addition, the incinerator body 2 has a protrusion inclined obliquely downward to the inside of the incinerator body 2 on the inner surface of the incinerator body 2 at the upper surface position of the rooster 22 provided at the lower part of the incinerator body 2. In this case, a step 8 having a shape is provided.

また、本発明の焼却炉１は、前記排出口密閉扉２６には燃焼空気供給調節口２６１を設けた、ことを特徴とするものである。 Further, the incinerator 1 of the present invention is characterized in that the discharge airtight door 26 is provided with a combustion air supply adjusting port 261.

次に、本発明の焼却炉１で被燃焼物である廃プラを焼却処理した結果、廃棄物中の廃プラ７０％（質量比）で、大氣中に排出された排出ガスに含まれるダイオキシン類の濃度は、環境省が規定する環境基準を充分にクリアするものである。 Next, as a result of incineration treatment of waste plastic which is a combusted material in the incinerator 1 of the present invention, the dioxins contained in the exhaust gas discharged into the large bowl with 70% waste plastic (mass ratio) in the waste. The concentration of is sufficiently clear of the environmental standards stipulated by the Ministry of the Environment.

以上の説明は、開示された実施の形態のすべての点で例示であり制限的なものではない。従って、本発明の範囲は、上記の説明に限定されたものではなく、特許請求の範囲によって示されるものであり、特許請求の範囲と均等の意味及び範囲内のすべての変更が含まれることが意図されている。 The above description is illustrative and not restrictive in all respects of the disclosed embodiments. Therefore, the scope of the present invention is not limited to the above description, but is defined by the scope of the claims, and includes meanings equivalent to the scope of the claims and all modifications within the scope. Is intended.

本発明は、被燃焼物としての廃プラを焼却する焼却炉に適用できる。また、その他の被燃焼物の焼却にも適用できる。 The present invention can be applied to an incinerator that incinerates waste plastic as a combusted material. It can also be applied to incineration of other combustibles.

図１は、本発明の焼却炉の一実施例の正面図である。FIG. 1 is a front view of an embodiment of the incinerator of the present invention. 図２は、本発明の焼却炉の側面図の断面図である。FIG. 2 is a cross-sectional view of a side view of the incinerator of the present invention. 図３は、本発明の焼却炉の昇温用バーナーを説明ずるためのＡ−Ａ断面図である。FIG. 3 is an AA cross-sectional view for explaining a temperature raising burner of the incinerator of the present invention. 図４は、本発明の焼却炉の焼却炉体の段差を説明するためのＢ−Ｂ断面図である。FIG. 4 is a BB cross-sectional view for explaining the level difference of the incinerator body of the incinerator of the present invention. 図５は、昇温用バーナーのバーナー防護カバーを説明するための部分図である。FIG. 5 is a partial view for explaining the burner protective cover of the temperature raising burner.

Explanation of symbols

１焼却炉
２焼却炉体２１一次燃焼室２２ロストル２３焼却物投入口
２４焼却灰排出口２５投入口密閉扉２６排出口密閉扉
２６１燃焼空気供給調節口２６２外気調節扉
３排気筒
４燃焼筒４１二次燃焼室４２排気口４３二次空気供給管
４４空気噴射口４５二次空気送風管４６ブロワー
５外気遮断投入装置
６昇温用バーナー６１バーナー防護カバー
７燃料タンク７１燃料供給管
８段差８１傾斜面８２垂直面８３水平面
８４灰受箱
α 取付角度 β 離間距離
ｈ高低差
1 Incinerator
2 Incinerator 21 Primary combustion chamber 22 Rooster 23 Incinerator inlet 24 Incineration ash outlet 25 Inlet closed door 26 Outlet closed door 261 Combustion air supply control port 262 Outside air control door 3 Exhaust cylinder 4 Combustion cylinder 41 Secondary combustion Chamber 42 Exhaust port 43 Secondary air supply pipe 44 Air injection port 45 Secondary air blower pipe 46 Blower 5 Outside air shut-off device 6 Temperature rising burner 61 Burner protective cover 7 Fuel tank 71 Fuel supply pipe 8 Step 81 Inclined surface 82 Vertical Surface 83 Horizontal surface 84 Ash receiving box α Mounting angle β Separation distance h Height difference

Claims

A rooster is provided at the lower part of the incinerator body that forms the primary combustion chamber for burning the combustibles, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, and the inlet is sealed at the incinerator inlet A door is provided to be openable and closable, and an incineration ash discharge port is provided with a discharge port sealing door that is openable and closable, and an exhaust pipe communicating with the primary combustion chamber is provided on the upper surface of the combustion furnace body. An incinerator that forms a combustion chamber and has an exhaust port at the upper end,
A pair of temperature raising burners for raising the temperature of the combustion gas flowing from the primary combustion chamber to the exhaust pipe is provided so as to face diagonally upward, and the pair of temperature raising burners are arranged with a height difference from each other, An incinerator characterized in that the flame of the pair of temperature raising burners is arranged so as to circulate in a spiral shape in the exhaust pipe.

A rooster is provided at the lower part of the incinerator body that forms the primary combustion chamber for burning the combustibles, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, and the inlet is sealed at the incinerator inlet A door is provided to be openable and closable, a discharge door hermetic door is provided to be openable and closable at the incineration ash discharge port, and an exhaust pipe communicating with the primary combustion chamber is provided on the upper surface of the combustion furnace body, and communicated with the exhaust pipe. An incinerator provided with a combustion cylinder that forms a secondary combustion chamber and has an exhaust port at the upper end,
A pair of temperature raising burners for raising the temperature of the combustion gas flowing from the primary combustion chamber to the exhaust pipe is provided so as to face diagonally upward, and the pair of temperature raising burners are arranged with a height difference from each other, An incinerator characterized in that the flame of the pair of temperature raising burners is arranged so as to circulate in a spiral shape in the exhaust pipe.

An incinerator according to claim 1 or 2,
The incinerator body is provided with a step inclined obliquely downward to the inside of the incinerator body on the inner surface of the incinerator body at the upper surface position of the rooster provided at the lower part of the incinerator body. Furnace.

A rooster is provided in the lower part of the incinerator body that forms the primary combustion chamber for burning the combustibles, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, and the inlet is sealed at the incinerator inlet provided door openably, the said ash discharge port is provided to freely open and close the discharge port sealing door, the exhaust pipe in communication with the primary combustion chamber provided on the upper surface of the combustion furnace body, the two exhaust cylinder primary An incinerator that forms a combustion chamber and has an exhaust port at the upper end,
A pair of temperature raising burners for raising the temperature of the combustion gas flowing from the primary combustion chamber to the exhaust pipe is provided so as to face diagonally upward, and the pair of temperature raising burners are arranged with a height difference from each other, And the flame of the pair of temperature raising burners is arranged so as to circulate in a spiral shape in the exhaust pipe,
The incinerator body is provided with a step inclined obliquely downward to the inside of the incinerator body on the inner surface of the incinerator body at the upper surface position of the rooster provided in the lower part of the incinerator body,
The incinerator is provided with a step inclined obliquely downward to the inside of the incinerator body on the inner surface of the incinerator body at the upper surface position of the rooster, so that the waste plastic liquefied while burning inside the incinerator body or the Other incomplete combustion products containing waste plastic are received at the step to avoid outflow, and liquefied waste plastic that has flowed down while burning from an inclined step or other incomplete combustion containing the waste plastic The incinerator is combusted inside the incinerator body by burning while staying in the ash receiving box placed on the bottom surface inside the incinerator body. An incinerator characterized by being a two-stage combustion system that burns in

A rooster is provided in the lower part of the incinerator body that forms the primary combustion chamber for burning the combustibles, the incinerator inlet and the incineration ash outlet are provided in the combustion furnace body, and the inlet is sealed at the incinerator inlet A door is provided to be openable and closable, a discharge door hermetic door is provided to be openable and closable at the incineration ash discharge port, and an exhaust pipe communicating with the primary combustion chamber is provided on the upper surface of the combustion furnace body, and communicated with the exhaust pipe. An incinerator provided with a combustion cylinder that forms a secondary combustion chamber and has an exhaust port at the upper end,
A pair of temperature raising burners for raising the temperature of the combustion gas flowing from the primary combustion chamber in the exhaust pipe is provided so as to face diagonally upward, and the pair of temperature raising burners are arranged with a height difference from each other, And the flame of the pair of temperature raising burners is arranged so as to circulate in a spiral shape in the exhaust pipe,
The incinerator body is provided with a step inclined obliquely downward to the inside of the incinerator body on the inner surface of the incinerator body at the upper surface position of the rooster provided in the lower part of the incinerator body,
The incinerator is provided with a step inclined obliquely downward to the inside of the incinerator body on the inner surface of the incinerator body at the upper surface position of the rooster, so that the waste plastic liquefied while burning inside the incinerator body or the Other incomplete combustion products containing waste plastic are received at the step to avoid outflow, and liquefied waste plastic that has flowed down while burning from an inclined step or other incomplete combustion containing the waste plastic The incinerator is combusted inside the incinerator body by burning while staying in the ash receiving box placed on the bottom surface inside the incinerator body. An incinerator characterized by being a two-stage combustion system that burns in