JPH1163451A - Secondary combustion air supply device - Google Patents
Secondary combustion air supply deviceInfo
- Publication number
- JPH1163451A JPH1163451A JP9224792A JP22479297A JPH1163451A JP H1163451 A JPH1163451 A JP H1163451A JP 9224792 A JP9224792 A JP 9224792A JP 22479297 A JP22479297 A JP 22479297A JP H1163451 A JPH1163451 A JP H1163451A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- secondary air
- exhaust gas
- air supply
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Incineration Of Waste (AREA)
- Air Supply (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次燃焼空気供給
装置に係るもので、特に、ごみ焼却炉やボイラ等の燃焼
室内に二次空気を供給する二次燃焼空気供給装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary combustion air supply device, and more particularly to a secondary combustion air supply device for supplying secondary air into a combustion chamber such as a refuse incinerator or a boiler. .
【０００２】[0002]
【従来の技術】ごみ焼却炉では、供給されたごみを燃焼
室の炉床で着火、燃焼して焼却する。ごみ焼却時に炉床
から発生した一次燃焼ガスには、ＣＯなどの可燃ガスが
含まれている。この可燃ガスは、燃焼室に供給された二
次燃焼空気（以下「二次空気」という。）により完全燃
焼される。このときの燃焼状態は、二次空気と可燃ガス
の混合状態、温度などにより影響される。また、燃焼室
から排出された排ガスは、廃熱ボイラで蒸気を発生させ
た後、除塵して放出している。2. Description of the Related Art In a refuse incinerator, supplied refuse is ignited and burned in a hearth of a combustion chamber to be incinerated. The primary combustion gas generated from the hearth during incineration of refuse contains combustible gas such as CO. This combustible gas is completely burned by the secondary combustion air (hereinafter referred to as “secondary air”) supplied to the combustion chamber. The combustion state at this time is influenced by the mixed state of the secondary air and the combustible gas, the temperature, and the like. Further, the exhaust gas discharged from the combustion chamber generates steam in a waste heat boiler, and then discharges the dust after removing the dust.
【０００３】図４は従来のごみ焼却炉の断面図である。
図４において、１はごみ焼却炉であり、１ａはその燃焼
室である。２は熱交換器１０を通り、燃焼室１ａに接続
した二次空気供給管である。４は排ガス排出管であり、
６は排ガス排出管４に連結された廃熱ボイラである。４
ａは廃熱ボイラ６と熱交換器１０とを連結した蒸気管で
ある。７はごみ等の燃焼物である。なお、８は二次空気
の流れを、９は一次燃焼ガスをそれぞれ示している。FIG. 4 is a sectional view of a conventional refuse incinerator.
In FIG. 4, 1 is a refuse incinerator, and 1a is a combustion chamber thereof. Reference numeral 2 denotes a secondary air supply pipe connected to the combustion chamber 1a through the heat exchanger 10. 4 is an exhaust gas discharge pipe,
Reference numeral 6 denotes a waste heat boiler connected to the exhaust gas discharge pipe 4. 4
a denotes a steam pipe connecting the waste heat boiler 6 and the heat exchanger 10. Numeral 7 is a combustion product such as refuse. Reference numeral 8 denotes a flow of the secondary air, and reference numeral 9 denotes a primary combustion gas.
【０００４】このように、従来のごみ焼却炉１において
は、ごみ焼却炉１から排出された排ガス９は、廃熱ボイ
ラ６で蒸気を発生した後、放出される。二次空気は、熱
交換器１０を経て、廃熱ボイラ６で発生した蒸気の一部
または全部を利用して２００°Ｃ〜３００°Ｃに加熱さ
れ、二次空気供給管２から燃焼室１ａ内に吹き込まれ
る。As described above, in the conventional waste incinerator 1, the exhaust gas 9 discharged from the waste incinerator 1 is discharged after the waste heat boiler 6 generates steam. The secondary air passes through the heat exchanger 10 and is heated to 200 ° C. to 300 ° C. using part or all of the steam generated in the waste heat boiler 6, and is heated from the secondary air supply pipe 2 to the combustion chamber 1 a. It is blown in.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記ご
み焼却炉においては、燃焼室内は９００°Ｃ〜１，００
０°Ｃに保たれており、二次空気はボイラの蒸気により
加熱されて燃焼室に吹き込まれるが、ボイラの蒸気では
２００°Ｃ〜３００°Ｃ程度にしか加熱されず、完全燃
焼させるため二次空気を大量に吹き込むと燃焼室の温度
が部分的に低下してしまう。温度が低下すると可燃ガス
は不完全燃焼となり、ダイオキシンなどの有害物の熱に
よる分解が完全でなくなるなどの問題がある。However, in the above refuse incinerator, the temperature in the combustion chamber is 900 ° C to 1,000 ° C.
The secondary air is kept at 0 ° C., and the secondary air is heated by the steam of the boiler and blown into the combustion chamber. When a large amount of secondary air is blown, the temperature of the combustion chamber is partially reduced. When the temperature is lowered, the combustible gas becomes incompletely burned, and there is a problem that the decomposition of harmful substances such as dioxin by heat is not complete.
【０００６】本発明は、上記のような問題点を解決する
ために創案されたもので、二次空気を排ガスによって加
熱し、可燃ガスを完全燃焼させるとともに、燃焼室の温
度を上げてダイオキシンなどの有害物の排出を防止する
ようにした二次燃焼空気供給装置を提供することを目的
とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and heats secondary air with exhaust gas to completely burn combustible gas and raises the temperature of the combustion chamber to obtain dioxin and the like. It is an object of the present invention to provide a secondary combustion air supply device that prevents the discharge of harmful substances.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明によれば、ごみ焼却炉などの燃焼室内に二次
空気を供給する二次燃焼空気供給装置であって、燃焼室
に接続して設けた二次空気供給管にエジェクタを配設す
るとともに、排ガス吸引管を連結し、該エジェクタによ
り燃焼室から排ガスを吸引するとともに、二次空気と排
ガスとを混合して燃焼室内に噴射するようにした二次燃
焼空気供給装置が提供される。According to the present invention, there is provided, in accordance with the present invention, a secondary combustion air supply device for supplying secondary air into a combustion chamber such as a refuse incinerator, which is connected to the combustion chamber. An ejector is connected to the secondary air supply pipe provided as above, and an exhaust gas suction pipe is connected. The ejector sucks exhaust gas from the combustion chamber and mixes the secondary air with the exhaust gas to inject it into the combustion chamber. Thus, a secondary combustion air supply device is provided.
【０００８】本発明の実施形態によれば、上記排ガス吸
引管と二次空気供給管との間にサイクロンを介在させ、
該サイクロンにより排ガス中の煤塵を除去してから二次
空気と混合するようにするのが好ましい。According to an embodiment of the present invention, a cyclone is interposed between the exhaust gas suction pipe and the secondary air supply pipe,
It is preferable that dust in exhaust gas is removed by the cyclone and then mixed with secondary air.
【０００９】次に本発明の作用を説明する。ごみ焼却炉
の燃焼室内の高温の排ガスを、エジェクタによって吸引
して二次空気と混合させることにより、二次空気を加熱
してエジェクタによって燃焼室に噴射させるので、二次
空気の量を増しても燃焼室の温度が低下せず、燃焼室で
の二次燃焼をよくすることができる。また、燃焼室の温
度が常に高温に保たれているので、ダイオキシンなどの
有害物を熱により完全に分解することができ、ダイオキ
シンなどの排出を防止することができる。Next, the operation of the present invention will be described. The high-temperature exhaust gas in the combustion chamber of the refuse incinerator is sucked by the ejector and mixed with the secondary air, so that the secondary air is heated and injected into the combustion chamber by the ejector. Also, the temperature of the combustion chamber does not decrease, and the secondary combustion in the combustion chamber can be improved. Further, since the temperature of the combustion chamber is always kept at a high temperature, harmful substances such as dioxin can be completely decomposed by heat, and emission of dioxin and the like can be prevented.
【００１０】[0010]
【発明の実施の形態】以下、本発明の好ましい実施形態
について、図面に基づいて説明する。図１は本発明の一
実施形態を示すものであり、本発明による二次燃焼空気
供給装置を付けたごみ焼却炉の断面図である。なお、図
４で説明した部材と同じ部材については同じ符号を付し
ており、重複した説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows one embodiment of the present invention, and is a cross-sectional view of a refuse incinerator equipped with a secondary combustion air supply device according to the present invention. The same members as those described with reference to FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.
【００１１】図１において、１はごみ焼却炉であり、１
ａはその燃焼室である。２は燃焼室１ａに接続して設け
た二次空気供給管である。この二次空気供給管２は、エ
ジェクタ３を配設するとともに、燃焼室１ａに接続した
排ガス吸引管５を連結している。このエジェクタ３は、
図３に示すように、ノズル３ａと、混合室３ｂと、ディ
フューザ３ｃなどから構成されている。そして、二次空
気をノズル３ａから噴射して、混合室３ｂで燃焼室１ａ
から吸引した排ガス９ａと混合して混合ガス８ａとな
り、燃焼室１ａ内に噴射する。なお、排ガス９ａはごみ
燃焼炉１の頂部から、図示しない廃熱ボイラ、除塵器な
どを経て外部に排出される。In FIG. 1, reference numeral 1 denotes a refuse incinerator,
a is the combustion chamber. Reference numeral 2 denotes a secondary air supply pipe connected to the combustion chamber 1a. The secondary air supply pipe 2 is provided with an ejector 3 and connects an exhaust gas suction pipe 5 connected to the combustion chamber 1a. This ejector 3
As shown in FIG. 3, it includes a nozzle 3a, a mixing chamber 3b, a diffuser 3c, and the like. Then, secondary air is injected from the nozzle 3a, and the combustion chamber 1a is mixed in the mixing chamber 3b.
The mixed gas 8a is mixed with the exhaust gas 9a sucked from the fuel gas and becomes a mixed gas 8a, and is injected into the combustion chamber 1a. Note that the exhaust gas 9a is discharged from the top of the refuse combustion furnace 1 to the outside through a waste heat boiler, a dust remover, and the like (not shown).
【００１２】図２は本発明の他の実施形態を示すもので
ある。図２において、１１は排ガス吸引管５と二次空気
供給管２との間に設けたサイクロンで、排ガス中の煤塵
を除去する。FIG. 2 shows another embodiment of the present invention. In FIG. 2, reference numeral 11 denotes a cyclone provided between the exhaust gas suction pipe 5 and the secondary air supply pipe 2, and removes dust in the exhaust gas.
【００１３】次に本発明の実施形態の作用について説明
する。ごみ焼却炉１などの燃焼室１ａ内の高温の排ガス
９ａを、エジェクタ３によって吸引し、二次空気と混合
して混合ガス８ａとすることにより二次空気を加熱して
エジェクタ３によって燃焼室１ａに噴射させるので、燃
焼室１ａ内での一次燃焼ガス９中の可燃ガスと二次空気
の混合がよくなり、かつ、燃焼室１ａ内の温度が低下し
ないので、燃焼がよくなり可燃ガスを完全燃焼すること
ができる。また、燃焼室１ａの温度が常に高温に保たれ
ているので、ダイオキシンなどの有害物を熱により完全
に分解することができ、排出を防止することができる。Next, the operation of the embodiment of the present invention will be described. The high temperature exhaust gas 9a in the combustion chamber 1a such as the refuse incinerator 1 is sucked by the ejector 3, mixed with the secondary air to form a mixed gas 8a, and the secondary air is heated. , The mixture of the combustible gas in the primary combustion gas 9 and the secondary air in the combustion chamber 1a is improved, and the temperature in the combustion chamber 1a does not decrease. Can burn. Further, since the temperature of the combustion chamber 1a is always kept at a high temperature, harmful substances such as dioxin can be completely decomposed by heat, and emission can be prevented.
【００１４】本発明は、上記実施の形態では、ごみ焼却
炉の例について説明したが、ごみ焼却炉に限定されるも
のではなく、ボイラ等であってもよく、また、炉は縦型
であっても横型であってもよいなど、本発明の要旨を逸
脱しない範囲で種々変更し得ることは勿論である。Although the present invention has been described with reference to an example of a refuse incinerator in the above embodiment, the present invention is not limited to the refuse incinerator, but may be a boiler or the like. Needless to say, various changes may be made without departing from the spirit of the present invention, such as a horizontal type or a horizontal type.
【００１５】[0015]
【発明の効果】以上述べたように、本発明によれば、燃
焼室から排出される排ガスをエジェクタによって吸引し
て二次空気と混合することにより、二次空気を加熱して
エジェクタによって燃焼室に噴射させるので、燃焼室内
での一次燃焼ガス中の可燃ガスとの混合がよくなり、か
つ、燃焼室の温度低下がないので、可燃ガスを完全燃焼
することができる。また、ダイオキシンなどの有害物の
排出を防止することができるなどの優れた効果を奏す
る。As described above, according to the present invention, the exhaust gas discharged from the combustion chamber is sucked by the ejector and mixed with the secondary air, whereby the secondary air is heated and the ejector ejects the combustion chamber. Therefore, the combustion with the combustible gas in the primary combustion gas in the combustion chamber is improved, and the temperature of the combustion chamber does not decrease, so that the combustible gas can be completely burned. In addition, it has excellent effects such as the ability to prevent emission of harmful substances such as dioxin.
【図１】本発明による二次燃焼空気供給装置を付けたご
み焼却炉の断面図である。FIG. 1 is a sectional view of a refuse incinerator equipped with a secondary combustion air supply device according to the present invention.
【図２】本発明の他の実施形態の二次燃焼空気供給装置
を付けたごみ焼却炉の断面図である。FIG. 2 is a sectional view of a refuse incinerator provided with a secondary combustion air supply device according to another embodiment of the present invention.
【図３】本発明のエジェクタの断面図である。FIG. 3 is a sectional view of the ejector of the present invention.
【図４】従来のごみ焼却炉の断面図である。FIG. 4 is a sectional view of a conventional refuse incinerator.
１ ごみ焼却炉 １ａ 燃焼室 ２ 二次空気供給管 ３ エジェクタ ４ 排ガス排出管 ５ 排ガス吸引管 ６ ボイラ ７ 燃焼物 ８ 二次空気の流れ ８ａ 混合ガス ９ 一次燃焼ガス ９ａ 排ガス １０ 熱交換器 １１ サイクロン DESCRIPTION OF SYMBOLS 1 Garbage incinerator 1a Combustion chamber 2 Secondary air supply pipe 3 Ejector 4 Exhaust gas discharge pipe 5 Exhaust gas suction pipe 6 Boiler 7 Combustion material 8 Secondary air flow 8a Mixed gas 9 Primary combustion gas 9a Exhaust gas 10 Heat exchanger 11 Cyclone
Claims (2)
供給する二次燃焼空気供給装置であって、燃焼室に接続
して設けた二次空気供給管にエジェクタを配設するとと
もに、排ガス吸引管を連結し、該エジェクタにより燃焼
室から排ガスを吸引するとともに、二次空気と排ガスと
を混合して燃焼室内に噴射するようにしたことを特徴と
する二次燃焼空気供給装置。1. A secondary combustion air supply device for supplying secondary air into a combustion chamber such as a refuse incinerator, wherein an ejector is disposed in a secondary air supply pipe connected to the combustion chamber. An exhaust gas suction pipe is connected, the exhaust gas is sucked from the combustion chamber by the ejector, and the secondary air and the exhaust gas are mixed and injected into the combustion chamber.
間にサイクロンを介在させ、該サイクロンにより排ガス
中の煤塵を除去してから二次空気と混合するようにした
請求項１記載の二次燃焼空気供給装置。2. The method according to claim 1, wherein a cyclone is interposed between the exhaust gas suction pipe and the secondary air supply pipe, and the dust is removed from the exhaust gas by the cyclone before mixing with the secondary air. Secondary combustion air supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22479297A JP3849242B2 (en) | 1997-08-21 | 1997-08-21 | Secondary combustion air supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22479297A JP3849242B2 (en) | 1997-08-21 | 1997-08-21 | Secondary combustion air supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1163451A true JPH1163451A (en) | 1999-03-05 |
| JP3849242B2 JP3849242B2 (en) | 2006-11-22 |
Family
ID=16819282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22479297A Expired - Lifetime JP3849242B2 (en) | 1997-08-21 | 1997-08-21 | Secondary combustion air supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3849242B2 (en) |
-
1997
- 1997-08-21 JP JP22479297A patent/JP3849242B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3849242B2 (en) | 2006-11-22 |
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