JP5828590B2 - Garbage incinerator - Google Patents

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JP5828590B2
JP5828590B2 JP2013012279A JP2013012279A JP5828590B2 JP 5828590 B2 JP5828590 B2 JP 5828590B2 JP 2013012279 A JP2013012279 A JP 2013012279A JP 2013012279 A JP2013012279 A JP 2013012279A JP 5828590 B2 JP5828590 B2 JP 5828590B2
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一伸 真田
一伸 真田
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一伸 真田
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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
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Description

本発明はゴミ類焼却炉に係り、特に焼却炉内の燃焼温度を高め、燃焼効率を高めたゴミ類焼却炉に関する。   The present invention relates to a garbage incinerator, and more particularly, to a garbage incinerator having an increased combustion temperature and an increased combustion efficiency.

本発明者は、先に、炉体の前面にゴミ投入口を有し、投入したゴミを燃焼させる１次燃焼室と、該１次燃焼室に続いて下面開口の隔壁を介して設けられた２次燃焼室と、続いて上面開口した隔壁を介して集塵室を兼た３次燃焼室とで構成されたゴミ類焼却炉で、前記１次燃焼室の奥部に超耐熱鋼板でなる多数のフィンを備えた散気管を立設させ、かつ前記フィンの間に散気孔が複数個１次燃焼室の前方に向けて開孔されるとともに、前記散気管の底面に炉外に配設されたブロアーからの圧力空気を供給して前記散気孔から１次燃焼室内に圧力空気を噴射し、さらに前記１次燃焼室の天井部に前記フィン上に燃料油を滴下させるノズルを設けてなり、そして前記３次燃焼室内には煙突につながる燃焼ガス排気管（煙突分管）が天井を貫通して垂下されてなるゴミ類焼却炉の発明を行った（特許文献１）。   The present inventor previously provided a primary combustion chamber having a waste inlet at the front of the furnace body and combusting the introduced waste, and a partition wall in the lower surface opening following the primary combustion chamber. It is a refuse incinerator composed of a secondary combustion chamber and a tertiary combustion chamber that also serves as a dust collection chamber through a partition that opens on the upper surface, and is made of super heat-resistant steel plate at the back of the primary combustion chamber A diffuser tube provided with a large number of fins is erected, and a plurality of diffuser holes are opened between the fins toward the front of the primary combustion chamber and disposed outside the furnace on the bottom surface of the diffuser tube. A nozzle for supplying pressurized air from the blower, injecting the pressurized air into the primary combustion chamber from the diffuser holes, and dropping fuel oil on the fins at the ceiling of the primary combustion chamber is provided. In the tertiary combustion chamber, a combustion gas exhaust pipe (chimney branch pipe) connected to the chimney passes through the ceiling and hangs down. It was the invention of waste such incinerators formed by (Patent Document 1).

特開平１１−６３４４０公報Japanese Patent Laid-Open No. 11-63440

上記ゴミ類焼却炉において、散気管に供給される圧縮空気はブロアーが取り入れた外気であり、ゴミ類を投入して燃焼させる１次燃焼室へ前記散気管を介して噴射される圧縮空気の温度が熱せられた散気管によって上昇するが十分ではないことが課題となっていた。   In the above garbage incinerator, the compressed air supplied to the diffuser pipe is the outside air taken in by the blower, and the temperature of the compressed air injected through the diffuser pipe into the primary combustion chamber where the garbage is introduced and burned. However, the problem was that it was not sufficient, although it was raised by the heated diffuser.

本発明者は上記課題を下記の手段により解決した。
（１）炉体の前面にゴミ投入口を有し、投入したゴミ類を燃焼させる１次燃焼室と、炉体の天井から垂設された下面開口の仕切壁と、仕切壁を介して隣接して設けられた２次燃焼室と、２次燃焼室の炉体の床面に立設された仕切壁によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室とで構成されたゴミ類焼却炉であって、
前記１次燃焼室の奥部に超耐熱鋼板よりなる多数のフィンを上下に小間隔をおいて備えた散気管を立設させ、かつ前記上下のフィンの間の散気管の管壁に複数個の散気孔を前記１次燃焼室の前方に向けて穿設するとともに、
前記１次燃焼室の天井壁に前記散気管のフィン上面に燃料油を滴下するための燃料油滴下供給用ノズルを設け、
さらに前記散気管の基部を炉外に配設されたブロアーに連通する送気管に接続し、そしてブロアーに導入された空気の吸入管を空気加熱装置に接続してなり、前記空気加熱装置は、前記３次燃焼室兼集塵室の上方の炉外に延設された燃焼ガス排気管と、その外周面に捲回された一端が外気に開口し、他端が前記空位￥気の吸入管に接続された金属製パイプとからなり、
燃焼ガス排気管の外周面に捲回された金属製パイプ中で加熱された新鮮な外気がブロアーと送気管を通って前記散気管の散気孔から前記１次燃焼室の前方に向けて燃焼ガス流中に噴射されるようにしたことを特徴とするゴミ類焼却炉。 The present inventor has solved the above problems by the following means.
(1) A primary combustion chamber that has a dust inlet on the front surface of the furnace body and burns the entered garbage, a partition wall with a bottom opening that is suspended from the ceiling of the furnace body, and adjacent via the partition wall A secondary combustion chamber, and a tertiary combustion chamber / dust collection chamber formed in a conical space opened upward by a partition wall standing on the floor of the furnace body of the secondary combustion chamber, It is a garbage incinerator composed of
A diffuser pipe provided with a plurality of fins made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber, and a plurality of diffuser pipes on the wall of the diffuser pipe between the upper and lower fins. And diffusing the air diffusion holes toward the front of the primary combustion chamber,
A fuel oil dripping supply nozzle is provided on the ceiling wall of the primary combustion chamber for dripping fuel oil on the fin upper surface of the air diffuser.
Further, the base of the air diffuser is connected to an air supply pipe communicating with a blower disposed outside the furnace, and an air intake pipe introduced into the blower is connected to an air heating device. A combustion gas exhaust pipe extending outside the furnace above the tertiary combustion chamber / dust collection chamber, one end wound around the outer peripheral surface thereof is open to the outside air, and the other end is the suction pipe for the vacant air Consisting of a metal pipe connected to
Fresh fresh air heated in a metal pipe wound around the outer peripheral surface of the combustion gas exhaust pipe passes through the blower and the air supply pipe, and the combustion gas flows from the air diffusion hole of the air diffusion pipe toward the front of the primary combustion chamber. A garbage incinerator characterized by being injected into the stream.

（２） 炉体（２）の前面にゴミ類投入口（３０）を有し、投入したゴミ類を燃焼させる１次燃焼室（３）と、炉体（２）の天井から垂設された下面開口の仕切壁（２ａ）と、仕切壁（２ａ）を介して隣接して設けられた２次燃焼室（４）と、２次燃焼室（４）の炉体（２）の床面に立設された仕切壁（２ｂ）によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室（５）とで構成されたゴミ類焼却炉（１）であって、
前記１次燃焼室（３）の奥部に超耐熱鋼板よりなる多数のフィン（２１）を上下に小間隔をおいて備えた散気管（２０）を立設させ、かつ前記上下のフィン（２１）の間の散気管（２０）の管壁に複数個の散気孔（２２）を前記１次燃焼室（３）の前方に向けて穿設するとともに、
前記１次燃焼室（３）の天井壁に前記散気管（２０）のフィン（２１）上面に燃料油を滴下するための燃料油滴下供給用ノズル（２３）を設け、
さらに前記散気管（２０）の基部を加熱空気送気管（１７）の一端に接続し、そして同加熱空気送気管（１７）の他端を空気加熱装置（１０）の金属製パイプ（１４）の一端に接続し、
前記空気加熱装置（１０）は、前記３次燃焼室兼集塵室（５）の上方の炉外に延設された燃焼ガス排気管（６）と、その外周面に捲回された金属製パイプ（１４）とからなり、
同金属製パイプ（１４）の一端が、炉外に配設されたブロアー（１１）によって取り入れられた新鮮な外気が吸入外気分岐部を介して送られてくる吸入外気送気管（１６）に接続され、他端が前記加熱空気送気管（１７）に接続されてなり、
前記ブロアー（１１）が吸引した新鮮な外気を前記空気加熱装置（１０）によって加熱し、加熱された新鮮な外気が、前記加熱空気送気管（１７）を通って前記散気管（２０）の散気孔（２２）から前記１次燃焼室（３）の前方に向けて燃焼ガス流中に噴射されるようにするとともに、前記吸入外気分岐部（１５）で分岐された加熱前の外気を煙突（７）内に設けたエジェクタ（１８）に導いて上方に向けて噴出させてなることを特徴とするゴミ類焼却炉。 (2) The furnace body (2) has a garbage input (30) on the front surface, and is suspended from the primary combustion chamber (3) for burning the input garbage and the ceiling of the furnace body (2). On the floor surface of the furnace body (2) of the secondary combustion chamber (4), the secondary combustion chamber (4) provided adjacently via the partition wall (2a), the partition wall (2a) of the lower surface opening A refuse incinerator (1) composed of a tertiary combustion chamber / dust collection chamber (5) formed in a conical space opened upward by a standing partition wall (2b),
A diffuser pipe (20) provided with a large number of fins (21) made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber (3), and the upper and lower fins (21 A plurality of air diffusion holes (22) in the tube wall of the air diffusion tube (20) between the primary combustion chamber (3) and the front of the primary combustion chamber (3),
A fuel oil dropping supply nozzle (23) for dropping fuel oil on the upper surface of the fin (21) of the air diffusion pipe (20) is provided on the ceiling wall of the primary combustion chamber (3),
Further, the base of the air diffuser pipe (20) is connected to one end of the heated air supply pipe (17), and the other end of the heated air supply pipe (17) is connected to the metal pipe (14) of the air heating device (10). Connected to one end,
The air heating device (10) includes a combustion gas exhaust pipe (6) extending outside the furnace above the tertiary combustion chamber / dust collection chamber (5) and a metal wound around the outer peripheral surface thereof. It consists of a pipe (14)
One end of the metal pipe (14 ) is connected to a suction outside air supply pipe (16) through which fresh outside air taken in by a blower (11) disposed outside the furnace is sent via a suction outside air branching section. The other end is connected to the heated air supply pipe (17),
The fresh outside air sucked by the blower (11) is heated by the air heating device (10), and the heated fresh outside air passes through the heated air supply pipe (17) and is diffused in the diffuser pipe (20). The air is injected into the combustion gas flow from the pores (22) toward the front of the primary combustion chamber (3), and the unheated outside air branched by the intake outside air branching portion (15) is chimney ( 7) A refuse incinerator characterized in that it is guided to an ejector (18) provided inside and ejected upward.

（３）前記炉体の内壁が、金属ファイバーが混入されたキャスタブル耐火材で形成されてなることを特徴とする前項（１）又は（２）に記載のゴミ類焼却炉。
（４）金属ファイバーを含有するキャスタブル耐火材が、アルミナ系耐火原料とアルミナセメントとからなるキャスタブル耐火材に、線径が０．２〜０．３ｍｍ、長さが１０〜３０ｍｍのステンレスファイバーを１．０〜５．０重量％混有せしめたものであることを特徴とする前項（３）に記載のゴミ類焼却炉。 (3) The refuse incinerator according to (1) or (2) above, wherein the inner wall of the furnace body is formed of a castable refractory material mixed with metal fibers.
(4) A castable refractory material containing metal fibers is a castable refractory material composed of an alumina-based refractory raw material and alumina cement, and 1 stainless steel fiber having a wire diameter of 0.2 to 0.3 mm and a length of 10 to 30 mm. The refuse incinerator according to item (3), which is mixed in an amount of 0.0 to 5.0% by weight.

本発明のゴミ類焼却炉によって下記の効果が発揮される。
〈１〉本発明のゴミ類焼却炉は、炉体の前面にゴミ投入口を有し、投入したゴミ類を燃焼させる１次燃焼室と、炉体の天井から垂設された下面開口の仕切壁と、仕切壁を介して隣接して設けられた２次燃焼室と、２次燃焼室の炉体の床面に立設された仕切壁によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室とで構成され、
前記１次燃焼室の奥部に超耐熱鋼板よりなる多数のフィンを上下に小間隔をおいて備えた散気管を立設させ、かつ前記上下のフィンの間の散気管の管壁に複数個の散気孔を前記１次燃焼室の前方に向けて穿設するとともに、
前記１次燃焼室の天井壁に前記散気管のフィン上面に燃料油を滴下するための燃料油滴下供給用ノズルを設け、
さらに前記散気管の基部を炉外に配設されたブロアーに連通する送気管に接続し、そしてブロアーに導入された空気の吸入管を空気加熱装置に接続してなり、前記空気加熱装置は、前記３次燃焼室兼集塵室の上方の炉外に延設された燃焼ガス排気管と、その外周面に捲回された一端が外気に開口し、他端が前記空気の吸入管に接続された金属製パイプとからなり、
燃焼ガス排気管の外周面に捲回された金属製パイプ中で加熱された新鮮な外気がブロアーと送気管を通って前記散気管の散気孔から前記１次燃焼室の前方に向けて燃焼ガス流中に噴射されるようにしているので、
前記散気管から加熱された新鮮な外気が１次燃焼室に噴射供給され、かつ高温に加熱された散気管のフィン上面に滴下された燃料油の飛散気化による燃焼によって炉内温度も１０００〜１５００℃に達するので、
ゴミの完全燃焼を助長し、不完全燃焼成分が殆ど存在しない燃焼ガスが１次燃焼室から２次燃焼室、３次燃焼室に送られて再度燃焼され、完全燃焼ガスとして炉外へ排出される。
したがって有毒物質も完全に除去され、灰分が少なく、煙や悪臭のほとんど出ない環境に優しいゴミ類焼却炉が提供できる。
また燃料油としてエンジンオイル、天ぷら油、ミシン油、重油等の廃油を使用すれば廃油の処理も同時にできる。 The following effects are exhibited by the refuse incinerator of the present invention.
<1> The refuse incinerator of the present invention has a dust inlet at the front of the furnace body, a primary combustion chamber for burning the introduced garbage, and a partition of a lower surface opening suspended from the ceiling of the furnace body It was formed in a conical space opened upward by a wall, a secondary combustion chamber provided adjacently via the partition wall, and a partition wall standing on the floor of the furnace body of the secondary combustion chamber It consists of a tertiary combustion chamber and dust collection chamber,
A diffuser pipe provided with a plurality of fins made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber, and a plurality of diffuser pipes on the wall of the diffuser pipe between the upper and lower fins. And diffusing the air diffusion holes toward the front of the primary combustion chamber,
A fuel oil dripping supply nozzle is provided on the ceiling wall of the primary combustion chamber for dripping fuel oil on the fin upper surface of the air diffuser.
Further, the base of the air diffuser is connected to an air supply pipe communicating with a blower disposed outside the furnace, and an air intake pipe introduced into the blower is connected to an air heating device. A combustion gas exhaust pipe extending outside the furnace above the tertiary combustion chamber / dust collection chamber, one end wound around the outer peripheral surface thereof open to the outside air, and the other end connected to the air suction pipe And made of metal pipes,
Fresh fresh air heated in a metal pipe wound around the outer peripheral surface of the combustion gas exhaust pipe passes through the blower and the air supply pipe, and the combustion gas flows from the air diffusion hole of the air diffusion pipe toward the front of the primary combustion chamber. Because it is jetted in the flow,
Furnace temperature is also 1000-1500 due to the combustion of the fuel oil that has been sprayed and supplied from the diffuser pipe into the primary combustion chamber and dripped onto the fin upper surface of the diffuser pipe heated to a high temperature. Because it reaches ℃
Combustion gas that promotes complete combustion of waste and contains almost no incomplete combustion components is sent from the primary combustion chamber to the secondary combustion chamber and the tertiary combustion chamber, where it is combusted again and discharged out of the furnace as complete combustion gas. The
Therefore, it is possible to provide an environment-friendly garbage incinerator that completely removes toxic substances, has little ash, and emits almost no smoke or odor.
Further, if waste oil such as engine oil, tempura oil, sewing machine oil, heavy oil or the like is used as fuel oil, waste oil can be treated at the same time.

〈２〉炉体（２）の前面にゴミ類投入口（３０）を有し、投入したゴミ類を燃焼させる１次燃焼室（３）と、炉体（２）の天井から垂設された下面開口の仕切壁（２ａ）と、仕切壁（２ａ）を介して隣接して設けられた２次燃焼室（４）と、２次燃焼室（４）の炉体（２）の床面に立設された仕切壁（２ｂ）によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室（５）とで構成されたゴミ類焼却炉（１）であって、
前記１次燃焼室（３）の奥部に超耐熱鋼板よりなる多数のフィン（２１）を上下に小間隔をおいて備えた散気管（２０）を立設させ、かつ前記上下のフィン（２１）の間の散気管（２０）の管壁に複数個の散気孔（２２）を前記１次燃焼室（３）の前方に向けて穿設するとともに、
前記１次燃焼室（３）の天井壁に前記散気管（２０）のフィン（２１）上面に燃料油を滴下するための燃料油滴下供給用ノズル（２３）を設け、
さらに前記散気管（２０）の基部を加熱空気送気管（１７）の一端に接続し、そして同加熱空気送気管（１７）の他端を空気加熱装置（１０）の金属製パイプ（１４）の一端に接続し、
前記空気加熱装置（１０）は、前記３次燃焼室兼集塵室（５）の上方の炉外に延設された燃焼ガス排気管（６）と、その外周面に捲回された金属製パイプ（１４）とからなり、
同金属製パイプ（１４）の一端が、炉外に配設されたブロアー（１１）によって取り入れられた新鮮な外気が吸入外気分岐部を介して送られてくる吸入外気送気管（１６）に接続され、他端が前記加熱空気送気管（１７）に接続されてなり、
前記ブロアー（１１）が吸引した新鮮な外気を前記空気加熱装置（１０）によって加熱し、加熱された新鮮な外気が、前記加熱空気送気管（１７）を通って前記散気管（２０）の散気孔（２２）から前記１次燃焼室（３）の前方に向けて燃焼ガス流中に噴射されるようにするとともに、前記吸入外気分岐部（１５）で分岐された加熱前の外気を煙突（７）内に設けたエジェクタ（１８）に導いて上方に向けて噴出させているので、
煙突内の上昇気流が強まり、前記燃焼ガス排気管から排出される燃焼ガスへの吸引力が増すため短い煙突で燃焼効率のよいゴミ類焼却炉が得られ、さらに排気される燃焼ガスより低温の外気の導入によって、煙突から排出される燃焼ガスの温度を低下させることができ、熱排出量を減少させたゴミ類焼却炉を提供できる。
<2> The furnace body (2) has a garbage inlet (30) on the front surface, and is suspended from the primary combustion chamber (3) for burning the introduced garbage and the ceiling of the furnace body (2). On the floor surface of the furnace body (2) of the secondary combustion chamber (4), the secondary combustion chamber (4) provided adjacently via the partition wall (2a), the partition wall (2a) of the lower surface opening A refuse incinerator (1) composed of a tertiary combustion chamber / dust collection chamber (5) formed in a conical space opened upward by a standing partition wall (2b),
A diffuser pipe (20) provided with a large number of fins (21) made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber (3), and the upper and lower fins (21 A plurality of air diffusion holes (22) in the tube wall of the air diffusion tube (20) between the primary combustion chamber (3) and the front of the primary combustion chamber (3),
A fuel oil dropping supply nozzle (23) for dropping fuel oil on the upper surface of the fin (21) of the air diffusion pipe (20) is provided on the ceiling wall of the primary combustion chamber (3),
Further, the base of the air diffuser pipe (20) is connected to one end of the heated air supply pipe (17), and the other end of the heated air supply pipe (17) is connected to the metal pipe (14) of the air heating device (10). Connected to one end,
The air heating device (10) includes a combustion gas exhaust pipe (6) extending outside the furnace above the tertiary combustion chamber / dust collection chamber (5) and a metal wound around the outer peripheral surface thereof. It consists of a pipe (14)
One end of the metal pipe (14 ) is connected to a suction outside air supply pipe (16) through which fresh outside air taken in by a blower (11) disposed outside the furnace is sent via a suction outside air branching section. The other end is connected to the heated air supply pipe (17),
The fresh outside air sucked by the blower (11) is heated by the air heating device (10), and the heated fresh outside air passes through the heated air supply pipe (17) and is diffused in the diffuser pipe (20). The air is injected into the combustion gas flow from the pores (22) toward the front of the primary combustion chamber (3), and the unheated outside air branched by the intake outside air branching portion (15) is chimney ( 7) Since it is guided to the ejector (18) provided in the interior and ejected upward,
Ascending air current in the chimney becomes stronger, and the suction power to the combustion gas discharged from the combustion gas exhaust pipe increases, so that a garbage incinerator with good combustion efficiency can be obtained with a short chimney, and further, the temperature is lower than that of the exhausted combustion gas. By introducing outside air, the temperature of the combustion gas discharged from the chimney can be lowered, and a refuse incinerator with reduced heat discharge can be provided.

〈３〉前記炉体の内壁が、アルミナ系耐火原料とアルミナセメントとからなるキャスタブル耐火材に、線径が０．２〜０．３ｍｍ、長さが１０〜３０ｍｍのステンレスファイバーを１．０〜５．０重量％混有せしめた金属ファイバーが混入されたキャスタブル耐火材で形成されているので、炉壁の亀裂発生や熱的スポールや衝撃・摩耗による剥離が抑止され、耐久性に富むゴミ類焼却炉が提供できる。
また、ステンレスファイバーの混入により、炉壁への熱伝導率が高まり、加熱時間が短縮されるので燃焼効率のよいゴミ類焼却炉が提供できる。 <3> An inner wall of the furnace body is castable refractory material made of an alumina-based refractory raw material and alumina cement, and a stainless fiber having a wire diameter of 0.2 to 0.3 mm and a length of 10 to 30 mm is 1.0 to Because it is made of castable refractory material mixed with 5.0% by weight of metal fiber, it can prevent cracking of the furnace wall, exfoliation due to thermal spall, impact and wear, and has excellent durability. An incinerator can be provided.
Moreover, the mixing of the stainless steel fiber increases the thermal conductivity to the furnace wall and shortens the heating time, so that it is possible to provide a garbage incinerator with good combustion efficiency.

本発明のゴミ類焼却炉の実施例の側面図（一部断面）Side view (partial cross section) of an embodiment of the garbage incinerator of the present invention 本発明のゴミ類焼却炉の他の実施例の側面図（一部断面）Side view (partly cross section) of another embodiment of the refuse incinerator of the present invention 図２に示すゴミ類焼却炉の背面図Rear view of the garbage incinerator shown in FIG. １次燃焼室奥部の正面図Front view of the back of the primary combustion chamber 背面から見た３次燃焼室の断面図Sectional view of the tertiary combustion chamber as seen from the back

本発明のゴミ類焼却炉を実施するための形態を実施例の図に基づいて説明する。
図１は本発明のゴミ類焼却炉の実施例の側面図（一部断面）、図２は本発明のゴミ類焼却炉の他の実施例の側面図（一部断面）、図３は図２に示すゴミ類焼却炉の背面図、図４は１次燃焼室奥部の正面図、図５は背面から見た３次燃焼室の断面図である。
図において１はゴミ類焼却炉、２は炉体、２ａ、２ｂは仕切壁、３は１次燃焼室、４は２次燃焼室、５は３次燃焼室兼集塵室、６は燃焼ガス排気管、７は煙突、１０は空気加熱装置、１１はブロアー、１２は送気管、１３は吸気管、１４は金属製パイプ、１４ａは開口、１５は吸入外気分岐部、１６は吸入外気送気管、１７は加熱空気送気管、１８はエジェクタ、２０は散気管、２１はフィン、２２は散気孔、２３は燃料油滴下供給用ノズル、３０はゴミ投入口、３１は灰取出口を示す。 EMBODIMENT OF THE INVENTION The form for implementing the refuse incinerator of this invention is demonstrated based on the figure of an Example.
FIG. 1 is a side view (partial cross section) of an embodiment of the garbage incinerator of the present invention, FIG. 2 is a side view (partial cross section) of another embodiment of the garbage incinerator of the present invention, and FIG. 4 is a rear view of the refuse incinerator shown in FIG. 2, FIG. 4 is a front view of the inner part of the primary combustion chamber, and FIG. 5 is a sectional view of the tertiary combustion chamber as seen from the rear.
In the figure, 1 is a garbage incinerator, 2 is a furnace body, 2a and 2b are partition walls, 3 is a primary combustion chamber, 4 is a secondary combustion chamber, 5 is a tertiary combustion chamber / dust collection chamber, and 6 is a combustion gas. Exhaust pipe, 7 is a chimney, 10 is an air heating device, 11 is a blower, 12 is an air supply pipe, 13 is an intake pipe, 14 is a metal pipe, 14a is an opening, 15 is an intake outside air branch, 16 is an intake outside air supply pipe , 17 is a heated air supply pipe, 18 is an ejector, 20 is a diffuser pipe, 21 is a fin, 22 is an air diffuser hole, 23 is a fuel oil drop supply nozzle, 30 is a dust inlet, and 31 is an ash removal outlet.

本発明のゴミ類焼却炉の第１の実施例は、図１に示すように、炉体２の前面にゴミ類投入口を有し、投入したゴミ類を燃焼させる１次燃焼室３と、炉体２の天井から垂設された下面開口の仕切壁２ａと、仕切壁２ａを介して隣接して設けられた２次燃焼室４と、２次燃焼室４の炉体２の床面に立設された仕切壁２ｂによって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室５とで構成され、前記１次燃焼室３の奥部に超耐熱鋼板よりなる多数のフィン２１を上下に小間隔をおいて備えた散気管２０を立設させ、かつ前記上下のフィン２１の間の散気管２０の管壁に複数個の散気孔２２を前記１次燃焼室３の前方に向けて穿設するとともに、前記１次燃焼室３の天井壁に前記散気管２０のフィン２１上面に燃料油を滴下するための燃料油滴下供給用ノズル２３を設けている。
そして前記散気管２０の基部に炉外に配設されたブロアー１１に連通する送気管１２を接続し、そしてブロアー１１に導入される空気の吸入管１２を、前記３次燃焼室兼集塵室５の上方の炉外に延設された燃焼ガス排気管６と、その外周面に捲回された一端が外気に開口し、他端が前記空気の吸入管１２に接続された金属製パイプ１４とで構成された空気加熱装置１０の金属製パイプ１４に接続してなり、前記燃焼ガス排気管６の外周面に捲回された金属製パイプ１４中で加熱された新鮮な外気がブロアー１１と送気管１２を通って前記散気管２０の散気孔２２から前記１次燃焼室３の前方に向けて燃焼ガス流中に噴射される構造となっている。
上記構造によって１次燃焼室３へ供給される新鮮な外気の温度が高まり、前記散気管２０を高温に保持でき、かつ燃焼ガスの温度低下も抑制され燃焼効率のよいゴミ類焼却炉１となっている。
なお、前記フィン２１は頂部に設けられるものを除き散気管２０の１次燃焼室３側の側面にその外形が矩形状をなすように熔着され、かつ下段に向かってその形状が大きくなるように形成され、前記燃焼油滴下用ノズル２３から滴下された燃料油が赤熱されたいずれかのフィン２１に滴下・飛散して気化され、１次燃焼室３に投入されたゴミ類を高温で燃焼させられるよう考慮されていることもその効果を高めている。 As shown in FIG. 1, the first embodiment of the refuse incinerator of the present invention has a garbage input port on the front surface of the furnace body 2, and a primary combustion chamber 3 for burning the introduced garbage, On the floor surface of the furnace body 2 in the secondary combustion chamber 4, the partition wall 2 a having a lower surface opening from the ceiling of the furnace body 2, the secondary combustion chamber 4 provided adjacently via the partition wall 2 a It is composed of a tertiary combustion chamber / dust collection chamber 5 formed in a conical space opened upward by an upright partition wall 2b, and a large number of super heat-resistant steel plates are formed at the back of the primary combustion chamber 3 A diffuser pipe 20 having a plurality of fins 21 at a small interval in the vertical direction is erected, and a plurality of diffuser holes 22 are formed in the tube wall of the diffuser pipe 20 between the upper and lower fins 21. For dropping the fuel oil on the upper surface of the fin 21 of the air diffuser pipe 20 on the ceiling wall of the primary combustion chamber 3. The postal oil dropping supply nozzle 23 is provided.
An air supply pipe 12 communicating with the blower 11 disposed outside the furnace is connected to the base of the air diffuser pipe 20, and the air intake pipe 12 introduced into the blower 11 is connected to the tertiary combustion chamber / dust collection chamber. A combustion gas exhaust pipe 6 extending outside the furnace above 5 and a metal pipe 14 having one end wound around the outer peripheral surface thereof opened to the outside air and the other end connected to the air suction pipe 12. The fresh outside air heated in the metal pipe 14 wound around the outer peripheral surface of the combustion gas exhaust pipe 6 is connected to the blower 11. The structure is such that the gas is injected into the combustion gas flow from the air diffusion hole 22 of the air diffusion tube 20 toward the front of the primary combustion chamber 3 through the air supply tube 12.
With the above structure, the temperature of fresh outside air supplied to the primary combustion chamber 3 is increased, the diffuser pipe 20 can be maintained at a high temperature, and the temperature reduction of the combustion gas is suppressed, so that the waste incinerator 1 with good combustion efficiency is obtained. ing.
The fins 21 are welded to the side surface of the diffuser tube 20 on the primary combustion chamber 3 side except for those provided at the top so that the outer shape is rectangular, and the shape increases toward the lower stage. The fuel oil dripped from the combustion oil dripping nozzle 23 is dripped and scattered on any of the red-heated fins 21 and vaporized, and the garbage put into the primary combustion chamber 3 is burned at a high temperature. Consideration to be made is also increasing its effect.

１次燃焼室３に続く２次燃焼室４は、１次燃焼室３で発生した煙を含む燃焼ガスを３次燃焼室兼集塵室５に導くとともに赤熱された炉体２の仕切壁２ｂに触れることによって燃焼ガス中の不完全燃焼ガスや燃え残りの微細なゴミを焼却する作用を行っている。このために前記散気管２０の背面に散気孔２２を一つ設けて２次燃焼室３に加熱された新鮮な外気を噴射して２次燃焼室での燃焼に寄与させることも好ましい。
この２次燃焼室４における上昇気流に乗らない重さのある燃え残りや灰は２次燃焼室４の底部の集塵部に落下し、焼却終了灰取出口３１から取り出される。
そして、３次燃焼室兼集塵室５に流入した不完全燃焼ガスはここで完全に燃焼され、また、その円錐形状の室構造によって発生する燃焼ガスの渦流によって燃焼ガスに混入しいる灰分は遠心分離されて除去されるので、有毒物質や灰分が含まれず、悪臭のほとんど出ないゴミ類焼却炉が提供される。 The secondary combustion chamber 4 following the primary combustion chamber 3 guides the combustion gas containing smoke generated in the primary combustion chamber 3 to the tertiary combustion chamber / dust collection chamber 5 and also the partition wall 2b of the furnace body 2 which has been red hot. The incomplete combustion gas in the combustion gas and the unburned fine dust are incinerated by touching. For this purpose, it is also preferable to provide one diffuser hole 22 on the back surface of the diffuser tube 20 and to inject fresh outside air heated in the secondary combustion chamber 3 to contribute to combustion in the secondary combustion chamber.
The unburned residue and ash having a weight that does not ride on the updraft in the secondary combustion chamber 4 fall to the dust collection portion at the bottom of the secondary combustion chamber 4 and are taken out from the incineration end ash removal outlet 31.
The incomplete combustion gas flowing into the tertiary combustion chamber / dust collection chamber 5 is completely combusted here, and the ash mixed in the combustion gas by the swirl of the combustion gas generated by the conical chamber structure is Since it is removed by centrifuging, a trash incinerator that does not contain toxic substances and ash and generates almost no bad odor is provided.

本発明のゴミ類焼却炉の第２の実施例は、図２に示すように、上記実施例１のゴミ類焼却炉１における空気加熱装置１０の金属製パイプ１４が、その一端に炉外に配設されたブロアー１１によって取り入れられた新鮮な外気が送られてくる吸入外気送気管１６を接続し、他端に前記散気管２０の基部へ前記空気加熱装置１０で加熱された加熱空気を送る加熱空気送気管１７を接続してなり、前記ブロアー１１が吸引した新鮮な外気を前記空気加熱装置１０によって加熱し、加熱された新鮮な外気が前記加熱空気送気管１７を通って前記散気管２０の散気孔２２から前記１次燃焼室３の前方に向けて燃焼ガス流中に噴射されるようにするとともに、前記吸入外気分岐部１５で分岐された加熱前の外気を煙突７内に設けたエジェクタ１８に導いて上方に向けて噴出させられるよう構成されている。
ブロアー１１によって取り込まれた新鮮な外気は、吸入外気分岐部１５によって２分岐され一方が吸入外気送気管１６を介して前記空気加熱装置１０に送られ、前記金属製パイプ１４内で熱せられた外気が、加熱空気送気管１７を通して散気管２０の底部に供給され、複数の散気孔２２から１次燃焼室３に噴出させている。
なお、加熱された新鮮外気を散気管２０に導く加熱空気送気管１７に、加熱された新鮮外気の温度低下を防止するための断熱材を被装しておくことも好ましい。
また、前記吸入外気分岐部１５で分岐されたもう一方の吸入外気は、煙突７内に設けられたエジェクタ１８に導かれて上方に向けて噴出され、煙突７内に上昇気流を起こして前記燃焼ガス排気管６からの燃焼ガスを吸引し、短い煙突７でも効率よく燃焼が行われるよう作用させている。また、加熱前の吸入外気を用いることによって、煙突７から排出される燃焼ガスの温度を低下させる作用効果も得ている。 As shown in FIG. 2, in the second embodiment of the refuse incinerator of the present invention, the metal pipe 14 of the air heating device 10 in the refuse incinerator 1 of the first embodiment is disposed outside the furnace at one end. A suction outside air supply pipe 16 to which fresh outside air taken in by the arranged blower 11 is sent is connected, and heated air heated by the air heating device 10 is sent to the base of the air diffusion pipe 20 at the other end. The heated air supply pipe 17 is connected, the fresh outside air sucked by the blower 11 is heated by the air heating device 10, and the heated fresh outside air passes through the heated air supply pipe 17 and the diffuser pipe 20. The air is injected into the combustion gas flow from the air diffusion hole 22 toward the front of the primary combustion chamber 3, and the outside air before heating branched by the intake outside air branching portion 15 is provided in the chimney 7. Lead to ejector 18 It is configured to be jetted toward the person.
Fresh outside air taken in by the blower 11 is bifurcated by a suction outside air branching portion 15, one of which is sent to the air heating device 10 via a suction outside air supply pipe 16, and the outside air heated in the metal pipe 14. Is supplied to the bottom of the diffuser tube 20 through the heated air supply tube 17 and is ejected from the plurality of diffuser holes 22 to the primary combustion chamber 3.
In addition, it is also preferable to cover the heated air supply pipe 17 that guides the heated fresh outside air to the diffuser pipe 20 with a heat insulating material for preventing a temperature drop of the heated fresh outside air.
Further, the other intake outside air branched by the intake outside air branching section 15 is guided to an ejector 18 provided in the chimney 7 and is ejected upward, causing an upward air flow in the chimney 7 to cause the combustion. The combustion gas from the gas exhaust pipe 6 is sucked so that even a short chimney 7 can be burned efficiently. Moreover, the effect of reducing the temperature of the combustion gas discharged | emitted from the chimney 7 is also acquired by using the suction | inhalation external air before a heating.

本実施例のゴミ類焼却炉は、図３に示すように１次燃焼室３の奥部に複数のフィン２１を備えた散気管２０が左右に２本立設され、また図４に見られるように上方に開口した円錐状の空間でなる３次燃焼室５が左右に２室備えられられている。したがって３次燃焼室５からの燃焼ガスを煙突７に導く燃焼ガス排気管６も炉体２の天井を貫通して２本設けられ、煙突７に繋げられている。したがって、図３及び図４に見られるように２本の燃焼ガス排気管６に螺旋状に捲回した金属パイプ１４を直列に接続して空気加熱装置１０を形成して、より高温の新鮮外気を１次燃焼室３に供給する構造にすることが好ましい。   In the refuse incinerator of this embodiment, as shown in FIG. 3, two diffuser tubes 20 each having a plurality of fins 21 are provided on the left and right sides of the primary combustion chamber 3, as seen in FIG. A tertiary combustion chamber 5 having a conical space opened upward is provided on the left and right. Therefore, two combustion gas exhaust pipes 6 that lead the combustion gas from the tertiary combustion chamber 5 to the chimney 7 are also provided through the ceiling of the furnace body 2 and connected to the chimney 7. Therefore, as can be seen in FIGS. 3 and 4, the metal pipe 14 spirally wound around the two combustion gas exhaust pipes 6 is connected in series to form the air heating device 10, so that a higher temperature fresh outdoor air is formed. Is preferably supplied to the primary combustion chamber 3.

本発明のゴミ類焼却炉１の炉体２の内壁は、アルミナ系耐火原料とアルミナセメントとからなるキャスタブル耐火材（「アサヒキャスターＣＡ１６Ｓ」商品名：ＡＧＣセラミックス株式会社製の不定形耐火物）に、線径が０．２〜０．３ｍｍ、長さが１０〜３０ｍｍのステンレスファイバーを１．０〜５．０重量％混有せしめた金属ファイバーが混入されたキャスタブル耐火材で形成されている。したがって、炉壁の亀裂発生や熱的スポールや衝撃・摩耗による剥離が抑止され、耐久性に富むゴミ類焼却炉となっている。
また、ステンレスファイバーの混入により、炉壁の熱伝導率が高まり、加熱時間が短縮されるので燃焼効率のよいゴミ類焼却炉ともなっている。 The inner wall of the furnace body 2 of the refuse incinerator 1 of the present invention is castable refractory material made of an alumina-based refractory raw material and alumina cement (“Asahi Caster CA16S”, trade name: AGC Ceramics Co., Ltd. refractory). It is formed of a castable refractory material mixed with metal fibers mixed with 1.0 to 5.0% by weight of stainless steel fibers having a wire diameter of 0.2 to 0.3 mm and a length of 10 to 30 mm. Therefore, cracking of the furnace wall, thermal spalling, and delamination due to impact and wear are suppressed, and the waste incinerator has high durability.
In addition, the mixing of the stainless fiber increases the thermal conductivity of the furnace wall and shortens the heating time, so that it is also a garbage incinerator with good combustion efficiency.

本発明のゴミ類焼却炉の運転開始時の操作は、次の手順で行われる。
ａ．着火した古紙を炉内に投入すると同時に、段ボールなどを追加投入して火力を強める。
ｂ．次いで散気管２０の真上の天井部に設けた燃料油滴下供給用ノズル２３から燃料油をフィン２１上に滴下する。滴下された燃料油は、フィン２１に衝突して飛散しながら燃焼する。
ｃ．燃焼が盛んになり始めたとき、ブロアー１０の運転を開始し散気管２０の散気孔２２から１次燃焼室３内に加熱された新鮮外気を供給するとともに、前記燃料油滴下供給用ノズル２３からの燃料油の供給を徐々に増加し１次燃焼室３の温度上昇を図る。
ｄ．１次燃焼室３の温度が８００℃以上になったところでゴミ類を投入して焼却を始める。
ｅ．ゴミ焼却中は燃料油の滴下、ブロアーの運転を継続する。
なお、燃料油としてエンジンオイル、天ぷら油、ミシン油、重油等の廃油を使用すれば、これら廃油の焼却処理が同時に実施できるメリットもある。 The operation at the start of operation of the refuse incinerator of the present invention is performed according to the following procedure.
a. At the same time as putting the ignited waste paper into the furnace, add cardboard and other materials to increase the thermal power.
b. Subsequently, fuel oil is dripped on the fin 21 from the fuel oil dripping supply nozzle 23 provided in the ceiling portion directly above the diffuser tube 20. The dropped fuel oil collides with the fins 21 and burns while being scattered.
c. When combustion begins to flourish, the operation of the blower 10 is started to supply fresh fresh air heated into the primary combustion chamber 3 from the diffuser holes 22 of the diffuser pipe 20 and from the fuel oil dripping supply nozzle 23. The fuel oil supply is gradually increased to increase the temperature of the primary combustion chamber 3.
d. When the temperature of the primary combustion chamber 3 reaches 800 ° C. or higher, garbage is introduced and incineration is started.
e. Continue dripping fuel oil and operating the blower during garbage incineration.
If waste oil such as engine oil, tempura oil, sewing machine oil, heavy oil or the like is used as the fuel oil, there is an advantage that the waste oil can be incinerated simultaneously.

１：ゴミ類焼却炉
２：炉体
２ａ、２ｂ：仕切壁
３：１次燃焼室
４：２次燃焼室
５：３次燃焼室
６：燃焼ガス排気管
７：煙突
１０：空気加熱装置
１１：ブロアー
１２：送気管
１３：吸入管
１４：金属製パイプ
１４ａ：開口
１５：吸入外気分岐部
１６：吸入外気送気管
１７：加熱空気送気管
１８：エジェクタ
２０：散気管
２１：フィン
２２：散気孔
２３：燃料油滴下供給用ノズル
３０：ゴミ投入口
３１：灰取出口
1: waste incinerator 2: furnace body 2a, 2b: partition wall 3: primary combustion chamber 4: secondary combustion chamber 5: tertiary combustion chamber 6: combustion gas exhaust pipe 7: chimney 10: air heating device 11: Blower 12: Air supply pipe 13: Suction pipe 14: Metal pipe 14a: Opening 15: Suction external air branching section 16: Suction external air air supply pipe 17: Heated air air supply pipe 18: Ejector 20: Air diffuser pipe 21: Fin 22: Air diffuser hole 23 : Fuel oil dripping supply nozzle 30: Garbage inlet 31: Ash removal outlet

Claims (4)

炉体（２）の前面にゴミ類投入口（３０）を有し、投入したゴミ類を燃焼させる１次燃焼室（３）と、炉体（２）の天井から垂設された下面開口の仕切壁（２ａ）と、仕切壁（２ａ）を介して隣接して設けられた２次燃焼室（４）と、２次燃焼室（４）の炉体（２）の床面に立設された仕切壁（２ｂ）によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室（５）とで構成されたゴミ類焼却炉（１）であって、
前記１次燃焼室（３）の奥部に超耐熱鋼板よりなる多数のフィン（２１）を上下に小間隔をおいて備えた散気管（２０）を立設させ、かつ前記上下のフィン（２１）の間の散気管（２０）の管壁に複数個の散気孔（２２）を前記１次燃焼室（３）の前方に向けて穿設するとともに、
前記１次燃焼室（３）の天井壁に前記散気管（２０）のフィン（２１）上面に燃料油を滴下するための燃料油滴下供給用ノズル（２３）を設け、
さらに前記散気管（２０）の基部を炉外に配設されたブロアー（１１）に連通する送気管（１２）に接続し、そしてブロアー（１１）に導入される空気の吸入管（１２）を空気加熱装置（１０）に接続してなり、前記空気加熱装置（１０）は、前記３次燃焼室兼集塵室（５）の上方の炉外に延設された燃焼ガス排気管（６）と、その外周面に捲回された一端が外気に開口し、他端が前記空気の吸入管（１２）に接続された金属製パイプ（１４）とからなり、
燃焼ガス排気管（６）の外周面に捲回された金属製パイプ（１４）中で加熱された新鮮な外気がブロアー（１１）と送気管（１２）を通って前記散気管（２０）の散気孔（２２）から前記１次燃焼室（３）の前方に向けて燃焼ガス流中に噴射されるようにしたことを特徴とするゴミ類焼却炉。 The furnace body (2) has a garbage input port (30) on the front surface, and has a primary combustion chamber (3) for burning the input garbage, and a lower surface opening suspended from the ceiling of the furnace body (2). A partition wall (2a), a secondary combustion chamber (4) provided adjacently via the partition wall (2a), and a floor surface of the furnace body (2) of the secondary combustion chamber (4) are erected. A waste incinerator (1) configured with a tertiary combustion chamber and dust collection chamber (5) formed in a conical space opened upward by a partition wall (2b),
A diffuser pipe (20) provided with a large number of fins (21) made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber (3), and the upper and lower fins (21 A plurality of air diffusion holes (22) in the tube wall of the air diffusion tube (20) between the primary combustion chamber (3) and the front of the primary combustion chamber (3),
A fuel oil dropping supply nozzle (23) for dropping fuel oil on the upper surface of the fin (21) of the air diffusion pipe (20) is provided on the ceiling wall of the primary combustion chamber (3),
Further, the base of the air diffuser (20) is connected to an air supply pipe (12) communicating with a blower (11) disposed outside the furnace, and an air intake pipe (12) introduced into the blower (11) is provided. Connected to an air heating device (10), the air heating device (10) extends outside the furnace above the tertiary combustion chamber / dust collection chamber (5) and is a combustion gas exhaust pipe (6). And one end wound around the outer peripheral surface is opened to the outside air, and the other end is made of a metal pipe (14) connected to the air suction pipe (12),
Fresh fresh air heated in the metal pipe (14) wound around the outer peripheral surface of the combustion gas exhaust pipe (6) passes through the blower (11) and the air supply pipe (12) and flows into the diffuser pipe (20). A refuse incinerator characterized by being injected into the combustion gas flow from the air diffuser (22) toward the front of the primary combustion chamber (3). 炉体（２）の前面にゴミ類投入口（３０）を有し、投入したゴミ類を燃焼させる１次燃焼室（３）と、炉体（２）の天井から垂設された下面開口の仕切壁（２ａ）と、仕切壁（２ａ）を介して隣接して設けられた２次燃焼室（４）と、２次燃焼室（４）の炉体（２）の床面に立設された仕切壁（２ｂ）によって上方に開口した円錐状の空間に形成された３次燃焼室兼集塵室（５）とで構成されたゴミ類焼却炉（１）であって、
前記１次燃焼室（３）の奥部に超耐熱鋼板よりなる多数のフィン（２１）を上下に小間隔をおいて備えた散気管（２０）を立設させ、かつ前記上下のフィン（２１）の間の散気管（２０）の管壁に複数個の散気孔（２２）を前記１次燃焼室（３）の前方に向けて穿設するとともに、
前記１次燃焼室（３）の天井壁に前記散気管（２０）のフィン（２１）上面に燃料油を滴下するための燃料油滴下供給用ノズル（２３）を設け、
さらに前記散気管（２０）の基部を加熱空気送気管（１７）の一端に接続し、そして同加熱空気送気管（１７）の他端を空気加熱装置（１０）の金属製パイプ（１４）の一端に接続し、
前記空気加熱装置（１０）は、前記３次燃焼室兼集塵室（５）の上方の炉外に延設された燃焼ガス排気管（６）と、その外周面に捲回された金属製パイプ（１４）とからなり、
同金属製パイプ（１４）の一端が、炉外に配設されたブロアー（１１）によって取り入れられた新鮮な外気が吸入外気分岐部を介して送られてくる吸入外気送気管（１６）に接続され、他端が前記加熱空気送気管（１７）に接続されてなり、
前記ブロアー（１１）が吸引した新鮮な外気を前記空気加熱装置（１０）によって加熱し、加熱された新鮮な外気が、前記加熱空気送気管（１７）を通って前記散気管（２０）の散気孔（２２）から前記１次燃焼室（３）の前方に向けて燃焼ガス流中に噴射されるようにするとともに、前記吸入外気分岐部（１５）で分岐された加熱前の外気を煙突（７）内に設けたエジェクタ（１８）に導いて上方に向けて噴出させてなることを特徴とするゴミ類焼却炉。 The furnace body (2) has a garbage input port (30) on the front surface, and has a primary combustion chamber (3) for burning the input garbage, and a lower surface opening suspended from the ceiling of the furnace body (2). A partition wall (2a), a secondary combustion chamber (4) provided adjacently via the partition wall (2a), and a floor surface of the furnace body (2) of the secondary combustion chamber (4) are erected. A waste incinerator (1) configured with a tertiary combustion chamber and dust collection chamber (5) formed in a conical space opened upward by a partition wall (2b),
A diffuser pipe (20) provided with a large number of fins (21) made of super heat-resistant steel plates at a small distance in the vertical direction at the back of the primary combustion chamber (3), and the upper and lower fins (21 A plurality of air diffusion holes (22) in the tube wall of the air diffusion tube (20) between the primary combustion chamber (3) and the front of the primary combustion chamber (3),
A fuel oil dropping supply nozzle (23) for dropping fuel oil on the upper surface of the fin (21) of the air diffusion pipe (20) is provided on the ceiling wall of the primary combustion chamber (3),
Further, the base of the air diffuser pipe (20) is connected to one end of the heated air supply pipe (17), and the other end of the heated air supply pipe (17) is connected to the metal pipe (14) of the air heating device (10). Connected to one end,
The air heating device (10) includes a combustion gas exhaust pipe (6) extending outside the furnace above the tertiary combustion chamber / dust collection chamber (5) and a metal wound around the outer peripheral surface thereof. It consists of a pipe (14)
One end of the metal pipe (14 ) is connected to a suction outside air supply pipe (16) through which fresh outside air taken in by a blower (11) disposed outside the furnace is sent via a suction outside air branching section. The other end is connected to the heated air supply pipe (17),
The fresh outside air sucked by the blower (11) is heated by the air heating device (10), and the heated fresh outside air passes through the heated air supply pipe (17) and is diffused in the diffuser pipe (20). The air is injected into the combustion gas flow from the pores (22) toward the front of the primary combustion chamber (3), and the unheated outside air branched by the intake outside air branching portion (15) is chimney ( 7) A refuse incinerator characterized in that it is guided to an ejector (18) provided inside and ejected upward. 前記炉体（２）の内壁が、金属ファイバーを含有するキャスタブル耐火材で形成されてなることを特徴とする請求項１又は２に記載のゴミ類焼却炉。   The refuse incinerator according to claim 1 or 2, wherein an inner wall of the furnace body (2) is formed of a castable refractory material containing metal fibers. 金属ファイバーを含有するキャスタブル耐火材が、アルミナ系耐火原料とアルミナセメントとからなるキャスタブル耐火材に、線径が０．２〜０．３ｍｍ、長さが１０〜３０ｍｍのステンレスファイバーを１．０〜５．０重量％混有せしめたものであることを特徴とする請求項３に記載のゴミ類焼却炉。   Castable refractory material containing metal fiber is castable refractory material made of alumina-based refractory raw material and alumina cement, stainless steel fiber having a wire diameter of 0.2 to 0.3 mm and length of 10 to 30 mm is 1.0 to The refuse incinerator according to claim 3, which is mixed with 5.0% by weight.
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