JP2002349841A - Ash melting furnace - Google Patents
Ash melting furnaceInfo
- Publication number
- JP2002349841A JP2002349841A JP2001151289A JP2001151289A JP2002349841A JP 2002349841 A JP2002349841 A JP 2002349841A JP 2001151289 A JP2001151289 A JP 2001151289A JP 2001151289 A JP2001151289 A JP 2001151289A JP 2002349841 A JP2002349841 A JP 2002349841A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- duct
- dust
- melting furnace
- ash melting
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chimneys And Flues (AREA)
- Incineration Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Nozzles (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は例えば焼却灰、飛灰
等の灰を溶融して減容処理するための灰溶融炉に関し、
さらに詳しくは排ガスダクトの構造を改善した灰溶融炉
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ash melting furnace for melting ash such as incinerated ash and fly ash to reduce the volume.
More specifically, the present invention relates to an ash melting furnace having an improved exhaust gas duct structure.
【０００２】[0002]
【従来の技術】ごみを焼却して得た焼却灰や飛灰をプラ
ズマ炉で溶融し減容処理する技術がある。このような灰
溶融炉では従来、 （１）煙道（燃焼塔含む）などの排ガスダクト内温度が
揮散するダストの沸点より低い部分、特に水平部におい
てダストが溶着し、煙道が閉塞するという問題がある。2. Description of the Related Art There is a technology for melting incinerated ash and fly ash obtained by incinerating refuse in a plasma furnace to reduce the volume. Conventionally, in such an ash melting furnace, (1) dust is deposited in a portion where the temperature in an exhaust gas duct such as a flue (including a combustion tower) is lower than the boiling point of the volatilized dust, particularly in a horizontal portion, and the flue is clogged. There's a problem.
【０００３】（２）排ガスダクト内部を耐火物施工して
いる場合、耐火物とダストの付着性が強いため除去が困
難であった。(2) When a refractory is installed inside an exhaust gas duct, it is difficult to remove the refractory and dust due to strong adhesion between the refractory and the dust.
【０００４】（３）空冷のみのガス冷却では排ガス量が
多く処理設備が大規模なものとなり好ましくない。ま
た、水冷のみでは多量の水を必要とし乾式処理は困難な
ため、湿式処理となり水処理設備が必要であった。(3) Gas cooling using only air cooling is not preferable because the amount of exhaust gas is large and the processing equipment becomes large-scale. Further, only water cooling requires a large amount of water, and dry processing is difficult. Therefore, wet processing is required, and a water treatment facility is required.
【０００５】従来の灰溶融炉の排ガスダクトの閉塞防止
技術としては、特開平６−２６５１２９号公報に開示さ
れているように、金属製クリーニングチャンバ内で噴霧
水によって８００℃以下まで排ガスを減温し、かつ壁面
を常に濡れた状態に維持する技術が知られている。この
技術では壁面を常にぬらした状態で操業するため、排ガ
ス冷却設備と別に水処理設備が必要であった。また、特
開平９−６８３０７号公報に示されるように冷却空気の
みを用いて減温する技術も知られている。この技術では
排ガス量が増大するため後工程の排ガス処理設備が大規
模なものとなった。As a conventional technique for preventing the exhaust gas duct of an ash melting furnace from being clogged, as disclosed in JP-A-6-265129, the temperature of exhaust gas is reduced to 800 ° C. or less by spray water in a metal cleaning chamber. In addition, a technique for keeping the wall constantly wet is known. In this technique, since the operation is performed with the wall constantly wet, a water treatment facility is required separately from the exhaust gas cooling facility. Further, as disclosed in Japanese Patent Application Laid-Open No. 9-68307, a technique for reducing the temperature using only cooling air is also known. In this technology, the amount of exhaust gas increases, so that the exhaust gas treatment equipment in the post-process becomes large-scale.
【０００６】[0006]
【発明が解決しようとする課題】本発明では水冷と空冷
を併用する冷却システムを用い、２００℃以下まで乾式
での排ガスの急冷を行うことができる排ガスダクトを備
えた灰溶融炉を提供する。また、本発明はこの急冷部分
のダクトを冷却可能な金属壁とすることにより付着した
ダストを容易に除去できる構造を提供することを目的と
する。また、本発明は前記排ガスダクトに付着したダス
ト除去装置を備えた灰溶融炉を提供する。SUMMARY OF THE INVENTION The present invention provides an ash melting furnace provided with an exhaust gas duct capable of rapidly cooling dry exhaust gas to 200 ° C. or less by using a cooling system that uses both water cooling and air cooling. Another object of the present invention is to provide a structure that can easily remove attached dust by making the duct of the quenching portion a metal wall that can be cooled. Further, the present invention provides an ash melting furnace provided with a dust removing device attached to the exhaust gas duct.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記課題を解
決するためになされたもので、その技術手段はダクト内
に水冷ノズル及び空気吹込ノズルを配設すると共にダク
ト内壁を金属壁とした排ガスダクトを備えたことを特徴
とする灰溶融炉である。この場合、ダクトの形状等は任
意であるが、灰溶融炉の排ガスダクトに下向流鉛直部を
形成し、この鉛直部上端近傍に水冷ノズルを配設し、そ
の下方に空気吹込ノズルを配設すると好適である。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its technical means is to dispose a water cooling nozzle and an air blowing nozzle in a duct and to make the inner wall of the duct a metal wall. An ash melting furnace comprising an exhaust gas duct. In this case, the shape of the duct and the like are arbitrary, but a downward flow vertical portion is formed in the exhaust gas duct of the ash melting furnace, a water cooling nozzle is arranged near the upper end of the vertical portion, and an air blowing nozzle is arranged below it. It is preferable to provide them.
【０００８】本発明によれば水冷と空冷を併用すること
によって乾式での排ガスの急冷が可能となり、またダク
ト内を金属壁とすることによりダストの除去が容易とな
る。また、耐酸性に富み、特にＨＣｌに対して耐久性の
大きい金属を用いることによってダクトの長寿命化を図
ることができる。さらに、ダスト除去装置を備えること
によって、ダストの除去が一層容易となる。According to the present invention, the combined use of water cooling and air cooling enables rapid cooling of the exhaust gas in a dry system, and the use of metal walls in the duct facilitates dust removal. In addition, the use of a metal having high acid resistance and high durability especially against HCl can extend the life of the duct. Further, the provision of the dust removing device further facilitates dust removal.
【０００９】[0009]
【発明の実施の形態】以下図面を参照して本発明の実施
例を説明する。図３は従来の灰溶融炉の排ガスダクトを
示す説明図である。灰溶融炉３０は、焼却灰、飛灰等を
溶融するプラズマ炉である。灰溶融炉３０の排ガス３１
は排ガスダクト３２、冷却塔３３を経て排出される。排
ガス３１は１２００℃以上の温度で溶融炉３０から排出
される。排ガス３１中には沸点が１０００℃程度の塩化
物が揮散されている。排ガス温度が１０００℃より低い
部分では、これらが凝縮して壁面に付着する。排ガスダ
クト内温度が揮散するダストの沸点より低い部分ではダ
ストが溶着し、煙道が閉塞し、排ガスダクト内部を耐火
物施工している場合、耐火物とダスト３４との付着性が
強いため除去が困難であった。Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an explanatory view showing an exhaust gas duct of a conventional ash melting furnace. The ash melting furnace 30 is a plasma furnace for melting incinerated ash, fly ash, and the like. Exhaust gas 31 from the ash melting furnace 30
Is discharged through an exhaust gas duct 32 and a cooling tower 33. The exhaust gas 31 is discharged from the melting furnace 30 at a temperature of 1200 ° C. or higher. Chloride having a boiling point of about 1000 ° C. is volatilized in the exhaust gas 31. In a portion where the exhaust gas temperature is lower than 1000 ° C., these condense and adhere to the wall surface. In areas where the temperature inside the flue gas duct is lower than the boiling point of the volatilized dust, the dust is deposited, the flue is blocked, and if the inside of the flue gas duct is refractory-worked, it is removed due to the strong adhesion between the refractory and dust 34 Was difficult.
【００１０】図１は本発明の実施例を示す説明図であ
る。灰溶融炉の高温排ガス１７は例えばアフターバーナ
等を設けた燃焼塔で１０００℃以上の温度に保持されて
縦型のダクト１０内に誘導される。ダクト１０内には上
部に水冷ノズル１１、下部に空気吹込ノズル１２を備
え、排ガスを乾式で急冷する。ダクトの壁面１３には水
冷壁１４が設けられている。この水冷壁１４は耐酸性金
属を用いたもので、その表面に排ガス中の急冷されたダ
スト１５が付着する。耐酸性金属としては、例えばハス
テロイ（商品名）や耐酸鋼を用いる。ハステロイはＮｉ
を主体とした耐熱耐食性合金であって、Ｎｉ：５５〜６
０質量％、Ｍｏ：１８〜１２質量％、Ｆｅ：１８〜２２
質量％を含むものである。また、耐酸鋼は非酸化性の強
酸に耐える高Ｎｉステンレス鋼であって、Ｎｉ：２５〜
３０質量％、Ｃｒ：１７〜２０質量％、Ｍｏ：２〜５質
量％を含む鋼である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention. The high-temperature exhaust gas 17 from the ash melting furnace is guided into the vertical duct 10 while being kept at a temperature of 1000 ° C. or higher in a combustion tower provided with, for example, an afterburner. The duct 10 is provided with a water cooling nozzle 11 at an upper part and an air blowing nozzle 12 at a lower part, and the exhaust gas is rapidly cooled in a dry manner. A water cooling wall 14 is provided on the wall surface 13 of the duct. The water-cooling wall 14 is made of an acid-resistant metal, and the rapidly cooled dust 15 in the exhaust gas adheres to the surface thereof. As the acid-resistant metal, for example, Hastelloy (trade name) or acid-resistant steel is used. Hastelloy is Ni
A heat and corrosion resistant alloy mainly composed of Ni: 55-6
0 mass%, Mo: 18 to 12 mass%, Fe: 18 to 22
% By mass. The acid-resistant steel is a high Ni stainless steel that can withstand a strong non-oxidizing acid and has a Ni: 25 to
The steel contains 30% by mass, Cr: 17 to 20% by mass, and Mo: 2 to 5% by mass.
【００１１】本発明では排ガスが急冷されるため、排ガ
スダクト壁面にダストが付着するダスト付着領域１６は
局限化される。本発明では、冷却した金属壁上段に水冷
ノズル、下段に冷却空気吹込ノズルを設け、排ガス１７
を１０００℃以上から２００℃以下まで急冷することが
可能となり、しかも水処理設備を必要としない乾式での
排ガス急冷が可能となる。そして、金属壁を用いるた
め、付着ダストとの剥離性が著しく向上し、ダスト除去
を容易に行うことができる。さらに排ガス中に含まれる
ＨＣｌによる腐食を考慮し、耐酸性、耐食性を持つ金属
を用いることによって長期間の使用が可能となった。ま
た、金属壁の冷却を水冷、空冷の切替ができる構造とす
ることにより、その金属がＨＣｌに対して最も耐食性を
有する適切な温度に保つことができる。In the present invention, since the exhaust gas is rapidly cooled, the dust adhesion region 16 where dust adheres to the exhaust gas duct wall surface is localized. In the present invention, a water-cooling nozzle is provided on the upper stage of the cooled metal wall, and a cooling air blowing nozzle is provided on the lower stage.
Can be rapidly cooled from 1000 ° C. or more to 200 ° C. or less, and dry exhaust gas quenching can be performed without a water treatment facility. Further, since the metal wall is used, the removability from the attached dust is remarkably improved, and the dust can be easily removed. Furthermore, by using a metal having acid resistance and corrosion resistance in consideration of corrosion by HCl contained in exhaust gas, long-term use has become possible. Further, by adopting a structure in which the cooling of the metal wall can be switched between water cooling and air cooling, the metal can be maintained at an appropriate temperature having the most corrosion resistance to HCl.
【００１２】本発明の灰溶融炉にはさらに金属壁に付着
したダストを除去するダスト除去装置１９を備えること
が好ましい。付着ダスト除去装置１９は除去体２０が昇
降自在に設けられている。除去体２０の一例を図２に示
した。昇降回動軸２３は複数本の放射状のアーム２１を
備え、各アーム２１の先端にはダクトの内壁面１３から
ダストを掻き取る掻き取り部２２を備えている。この除
去体２０を昇降させ、除去体２０を回動方向２４のよう
に５〜４５°回動させながら昇降させ壁面１３から付着
ダストをかき取る。この動作を複数回繰り返すことによ
り、ダスト円周方向全面について付着したダストを除去
することができる。また、この付着ダスト除去装置１９
は前述のダスト内壁と同様に耐酸性を備えた金属製とす
ることが好ましい。排ガス急冷プロセスを用いることに
よって、ダスト付着範囲が狭くなり、ダスト除去装置１
９の作動範囲を狭い範囲に抑えることが可能となった。It is preferable that the ash melting furnace of the present invention further includes a dust removing device 19 for removing dust attached to the metal wall. The adhering dust removing device 19 is provided with a removing body 20 that can move up and down. FIG. 2 shows an example of the removal body 20. The elevating / lowering rotating shaft 23 includes a plurality of radial arms 21, and a tip of each arm 21 includes a scraping unit 22 that scrapes dust from the inner wall surface 13 of the duct. The removing body 20 is lifted and lowered, and is lifted and lowered while rotating the removing body 20 by 5 to 45 ° as in the rotating direction 24 to scrape off the adhered dust from the wall surface 13. By repeating this operation a plurality of times, dust adhering to the entire surface in the dust circumferential direction can be removed. Also, the attached dust removing device 19
Is preferably made of a metal having acid resistance like the above-mentioned dust inner wall. By using the exhaust gas quenching process, the dust adhesion range is narrowed, and the dust removal device 1
9 was able to be reduced to a narrow range.
【００１３】[0013]
【発明の効果】本発明によれば、水冷ノズルと空冷ノズ
ルを併用することにより灰溶融炉の排ガスを１０００℃
以上から２００℃以下までの急冷することが可能とな
り、金属壁を用いるので付着したダストと金属面での付
着性はほとんどなく、容易に除去可能となった。また、
好ましくは壁面に耐酸性、耐食性を持つ金属を用いるこ
とで壁面の腐食はほとんどなく、長期間の使用にも十分
対応可能となった。According to the present invention, the exhaust gas of the ash melting furnace is cooled to 1000 ° C. by using both the water cooling nozzle and the air cooling nozzle.
From the above, rapid cooling down to 200 ° C. or less became possible, and since the metal wall was used, there was almost no adherence of the adhered dust to the metal surface, and the metal wall was easily removed. Also,
Preferably, a metal having acid resistance and corrosion resistance is used for the wall surface, so that the wall surface hardly corrodes, and it is possible to sufficiently cope with long-term use.
【図１】実施例装置の説明図である。FIG. 1 is an explanatory diagram of an apparatus according to an embodiment.
【図２】実施例装置のダスト除去装着の除去体の平面図
である。FIG. 2 is a plan view of a removing body of the apparatus of the embodiment, which is mounted with dust removing.
【図３】従来技術の説明図である。FIG. 3 is an explanatory diagram of a conventional technique.
１０ ダクト １１ 水冷ノズル １２ 空気吹込ノズル １３ 壁面 １４ 水冷壁 １５ ダスト １６ ダスト付着領域 １７ 高温排ガス １８ 冷却された排ガス １９ ダスト除去装置 ２０ 除去体 ２１ アーム ２２ 掻き取り部 ２３ 昇降回動軸 ２４ 回動方向 ３０ 灰溶融炉 ３１ 排ガス ３２ 排ガスダクト ３３ 冷却塔 ３４ ダスト DESCRIPTION OF SYMBOLS 10 Duct 11 Water cooling nozzle 12 Air blowing nozzle 13 Wall surface 14 Water cooling wall 15 Dust 16 Dust adhesion area 17 High temperature exhaust gas 18 Cooled exhaust gas 19 Dust removal device 20 Remover 21 Arm 22 Scraping part 23 Elevation rotation axis 24 Rotation direction 30 Ash melting furnace 31 Exhaust gas 32 Exhaust gas duct 33 Cooling tower 34 Dust
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２７Ｄ 17/00 １０５ Ｂ０９Ｂ 3/00 ３０３Ｌ (72)発明者 林 昭彦 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社内 (72)発明者 菊地 亨 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社内 (72)発明者 菅原 英世 東京都千代田区内幸町２丁目２番３号 川 崎製鉄株式会社内 (72)発明者 柏原 賢一 兵庫県神戸市中央区東川崎町１丁目１番３ 号 川崎重工業株式会社内 (72)発明者 米田 章寛 兵庫県神戸市中央区東川崎町１丁目１番３ 号 川崎重工業株式会社内 (72)発明者 山本 彰 兵庫県神戸市中央区東川崎町１丁目１番３ 号 川崎重工業株式会社内 Ｆターム(参考） 3K061 RA02 RA03 RA09 RA10 RB02 RB03 3K070 DA35 4D004 AA36 AA37 CA29 CA32 CB31 CB37 CB43 CB50 4F033 AA04 BA02 BA04 DA01 EA04 4K056 AA05 CA20 DC05 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F27D 17/00 105 B09B 3/00 303L (72) Inventor Akihiko Hayashi 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo No. Kawasaki Steel Corporation (72) Inventor Toru Kikuchi 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Corporation (72) Inventor Hideyo Sugawara 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawa Inside (72) Kenichi Kashiwara 1-1-3 Higashikawasakicho, Chuo-ku, Kobe City, Hyogo Prefecture Inside (72) Inventor Akihiro Yoneda 1-1-1, Higashikawasakicho, Chuo-ku, Kobe City, Hyogo Prefecture No.3 Kawasaki Heavy Industries, Ltd. (72) Inventor Akira Yamamoto 1-3-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries, Ltd. F Terms (reference) 3K061 RA02 RA03 RA09 RA10 RB02 RB03 3K070 DA35 4D004 AA36 AA37 CA29 CA32 CB31 CB37 CB43 CB50 4F033 AA04 BA02 BA04 DA01 EA04 4K056 AA05 CA20 DC05
Claims (3)
ルを配設すると共にダクト内壁を金属壁とした排ガスダ
クトを備えたことを特徴とする灰溶融炉。1. An ash melting furnace comprising: a water cooling nozzle and an air blowing nozzle disposed in a duct; and an exhaust gas duct having an inner wall of the duct as a metal wall.
たことを特徴とする請求項１記載の灰溶融炉。2. The ash melting furnace according to claim 1, wherein said metal wall is made of a metal having acid resistance.
徴とする請求項１又は２記載の灰溶融炉。3. The ash melting furnace according to claim 1, further comprising a dust removing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001151289A JP2002349841A (en) | 2001-05-21 | 2001-05-21 | Ash melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001151289A JP2002349841A (en) | 2001-05-21 | 2001-05-21 | Ash melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002349841A true JP2002349841A (en) | 2002-12-04 |
Family
ID=18996165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001151289A Pending JP2002349841A (en) | 2001-05-21 | 2001-05-21 | Ash melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002349841A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006002966A (en) * | 2004-06-15 | 2006-01-05 | Takuma Co Ltd | Cooling water multistage spray-type exhaust gas temperature decreasing method |
| KR101121213B1 (en) | 2011-09-15 | 2012-03-22 | 주식회사 우리디씨아이 | Dust removing apparatus for dust collector |
| JP2014203762A (en) * | 2013-04-09 | 2014-10-27 | パナソニック株式会社 | Microwave heating device and microwave heating method |
| JP2019066110A (en) * | 2017-10-02 | 2019-04-25 | Ｄｏｗａエコシステム株式会社 | Incineration ash fusion processing device |
| CN110701629A (en) * | 2019-10-14 | 2020-01-17 | 范宝莲 | Industrial boiler flue gas dust collector |
| CN114260297A (en) * | 2022-03-02 | 2022-04-01 | 中国恩菲工程技术有限公司 | Device and method suitable for fly ash melting and flue gas purification treatment |
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2001
- 2001-05-21 JP JP2001151289A patent/JP2002349841A/en active Pending
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| JP2006002966A (en) * | 2004-06-15 | 2006-01-05 | Takuma Co Ltd | Cooling water multistage spray-type exhaust gas temperature decreasing method |
| KR101121213B1 (en) | 2011-09-15 | 2012-03-22 | 주식회사 우리디씨아이 | Dust removing apparatus for dust collector |
| JP2014203762A (en) * | 2013-04-09 | 2014-10-27 | パナソニック株式会社 | Microwave heating device and microwave heating method |
| JP2019066110A (en) * | 2017-10-02 | 2019-04-25 | Ｄｏｗａエコシステム株式会社 | Incineration ash fusion processing device |
| CN110701629A (en) * | 2019-10-14 | 2020-01-17 | 范宝莲 | Industrial boiler flue gas dust collector |
| CN114260297A (en) * | 2022-03-02 | 2022-04-01 | 中国恩菲工程技术有限公司 | Device and method suitable for fly ash melting and flue gas purification treatment |
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