JP3173537B2 - Particle size classification ash recirculation device - Google Patents
Particle size classification ash recirculation deviceInfo
- Publication number
- JP3173537B2 JP3173537B2 JP09632393A JP9632393A JP3173537B2 JP 3173537 B2 JP3173537 B2 JP 3173537B2 JP 09632393 A JP09632393 A JP 09632393A JP 9632393 A JP9632393 A JP 9632393A JP 3173537 B2 JP3173537 B2 JP 3173537B2
- Authority
- JP
- Japan
- Prior art keywords
- ash
- particle size
- coarse
- side hopper
- fine
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、粒径分級形灰再循環装
置に関するもので、詳しくは、石炭やごみなどの固形燃
料を火炉で燃焼させた後の未燃分を含む灰を火炉に戻し
て燃焼効率を上げるようにした灰再循環装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ash recirculation apparatus for classifying particle diameters, and more particularly, to an ashes containing unburned ash after burning solid fuel such as coal or refuse in a furnace. The present invention relates to an ash recirculation device that is returned to increase combustion efficiency.
【０００２】[0002]
【従来の技術】従来の石炭焚きボイラは、たとえば、図
２に示すような構成からなっている。図２において、１
はボイラ火炉、２は燃料供給ライン、３はサイクロン、
４は回収固形分戻しライン、５は後部伝熱部、６は集じ
ん器、７は誘引通風機、８は煙突、９はフライアッシュ
サイロ、１０は灰排出管、１１は灰再循環管である。2. Description of the Related Art A conventional coal-fired boiler has, for example, a configuration as shown in FIG. In FIG. 2, 1
Is a boiler furnace, 2 is a fuel supply line, 3 is a cyclone,
Reference numeral 4 denotes a recovered solids return line, 5 denotes a rear heat transfer section, 6 denotes a dust collector, 7 denotes an induction ventilator, 8 denotes a chimney, 9 denotes a fly ash silo, 10 denotes an ash discharge pipe, and 11 denotes an ash recirculation pipe. is there.
【０００３】図３は図２のフライアッシュサイロ９を拡
大して示している。図３において、１２は灰捨側ホッパ
部分、１３は灰再循環側ホッパ部分、１４と１５はバル
ブ、１６と１７はロータリフィーダ、１８は押込み通風
機、１９はエアクリーナである。FIG. 3 is an enlarged view of the fly ash silo 9 shown in FIG. In FIG. 3, reference numeral 12 denotes an ash-removing-side hopper portion, 13 denotes an ash-recirculation-side hopper portion, 14 and 15 denote valves, 16 and 17 denote rotary feeders, 18 denotes a forced-air ventilator, and 19 denotes an air cleaner.
【０００４】すなわち、従来の技術においては、集じん
器６で集じんされた灰をフライアッシュサイロ９に導
き、その約半分を灰排出管１０から排出し、残りの半分
を灰再循環管１１から回収固形分戻しライン４を経てボ
イラ火炉１に戻して未燃分を該火炉１で燃焼させてい
る。That is, in the prior art, the ash collected by the dust collector 6 is guided to a fly ash silo 9, about half of which is discharged from an ash discharge pipe 10, and the other half is transferred to an ash recirculation pipe 11. The unburned fuel is returned to the boiler furnace 1 through the recovered solids return line 4 to burn unburned components in the furnace 1.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、灰中の
未燃分は、粗粒灰中には非常に少なく、大部分は細粒灰
中にあるが、従来の技術では、フライアッシュサイロ９
のホッパを灰捨側ホッパ部分１２と灰再循環側ホッパ部
分１３の２つに分け、その灰再循環側ホッパ部分１３か
らの粗粒灰と細粒灰の両者をボイラ火炉１に戻し、灰中
の未燃分を再燃焼させている。このため、つまり、未燃
分の非常に少ない粗粒灰までボイラ火炉１に戻している
ので、効率的な再燃焼を行なうことができず、粒子負荷
が大きくなって、動力の損失が大きく、系内の灰が多く
なって摩耗が多くなるなどの問題点があった。However, the unburned matter in the ash is very small in the coarse ash and mostly in the fine ash.
The hopper is divided into two parts, a ash-removing-side hopper portion 12 and an ash-recirculating-side hopper portion 13, and both the coarse-grained ash and the fine-grained ash from the ash-recirculating-side hopper portion 13 are returned to the boiler furnace 1, The unburned components inside are reburned. For this reason, in other words, since the unburned coarse ash is returned to the boiler furnace 1, efficient reburning cannot be performed, the particle load increases, and the power loss increases. There were problems such as increased ash in the system and increased wear.
【０００６】本発明は、上記のような問題点を解決しよ
うとするものである。すなわち、本発明は、効率的な再
燃焼が可能であって、粒子負荷および動力損失ならびに
摩耗が少ない粒径分級形灰再循環装置を提供することを
目的とするものである。[0006] The present invention is intended to solve the above problems. That is, an object of the present invention is to provide a particle size classification ash recirculation device capable of efficient reburning and having less particle load, power loss and wear.
【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
に、本発明は、灰再循環側ホッパ部分および灰捨側ホッ
パ部分を有するフライアッシュサイロと、前記灰再循環
側ホッパ部分からの灰を導入してバブリング流動層によ
って細粒灰と粗粒灰とに分級する灰粒径分級装置と、こ
の灰粒径分級装置の底部の風箱に分級用空気を圧送する
ブロワと、前記灰粒径分級装置で浮上した細粒灰を火炉
に戻す細粒灰循環管とを備えているものとした。In order to achieve the above object, the present invention provides a fly ash silo having an ash recirculation side hopper portion and an ash rejection side hopper portion, and ash from the ash recirculation side hopper portion. An ash particle size classifier that classifies fine ash and coarse ash by a bubbling fluidized bed, a blower that feeds classification air to a wind box at the bottom of the ash particle size classifier, A fine-grain ash circulation pipe for returning the fine-grain ash floated by the diameter classifier to the furnace was provided.
【０００８】[0008]
【作用】本発明によれば、灰再循環側ホッパ部分および
灰捨側ホッパ部分を有するフライアッシュサイロと、前
記灰再循環側ホッパ部分からの灰を導入してバブリング
流動層によって細粒灰と粗粒灰とに分級する灰粒径分級
装置と、この灰粒径分級装置の底部の風箱に分級用空気
を圧送するブロワと、前記灰粒径分級装置で浮上した細
粒灰を火炉に戻す細粒灰循環管とを備えているので、灰
は前記灰粒径分級装置で、細粒灰と粗粒灰に分級され、
未燃分の多い細粒灰のみを火炉へ戻すことができる。According to the present invention, a fly ash silo having an ash recirculation side hopper portion and an ash rejection side hopper portion, and ash from the ash recirculation side hopper portion are introduced into a fine ash by a bubbling fluidized bed. An ash particle size classifier for classifying into coarse ash, a blower for pumping air for classification into a wind box at the bottom of the ash particle size classifier, and the fine ash floated by the ash particle size classifier into a furnace. Since it has a fine ash circulation pipe to return, the ash is classified into fine ash and coarse ash by the ash particle size classification device,
Only fine ash with a large amount of unburned material can be returned to the furnace.
【０００９】したがって、本発明によれば、従来の技術
の前述の問題点を巧みに解消することができる。Therefore, according to the present invention, the above-mentioned problems of the prior art can be skillfully solved.
【００１０】[0010]
【実施例】図１は本発明の一実施例を示している。図１
において、符号９と１０、１２ないし１７は、前述の図
２または図３に示したものと同一または均等なものであ
る。そして、２０は灰粒径分級装置で、フライアッシュ
サイロ９の灰再循環側ホッパ部分１３の下位に設けられ
ており、底部に風箱２１と、その上に空気噴射ノズル２
２を有し、バブリング流動層２３を形成するようになっ
ている。２４は前記灰粒径分級装置２０で分級されて浮
上した細粒灰を火炉に戻す細粒灰循環管、２５は前記風
箱２１に分級用空気を圧送するブロワ、２６はエアクリ
ーナ、２７は粗粒灰取出し管、２８はロータリフィー
ダ、２９は粗粒灰取出し分岐管、３０は該分岐管２９に
連結されて前記灰粒径分級装置２０からの排出粗粒灰を
フライアッシュサイロ９の灰捨側ホッパ部分１２の上部
に供給する粗粒灰戻し管、３１は粗粒灰系外排出管、３
２はバルブである。FIG. 1 shows an embodiment of the present invention. FIG.
In the figure, reference numerals 9 and 10, and 12 to 17 are the same as or equivalent to those shown in FIG. 2 or FIG. Reference numeral 20 denotes an ash particle size classification device, which is provided below the ash recirculation side hopper portion 13 of the fly ash silo 9 and has a wind box 21 at the bottom and an air injection nozzle 2 on it.
2 to form a bubbling fluidized bed 23. 24 is a fine ash circulating pipe for returning the fine ash which has been classified and floated by the ash particle size classification device 20 to the furnace, 25 is a blower for pumping air for classification into the wind box 21, 26 is an air cleaner, and 27 is a coarse cleaner. A ash take-off pipe, 28 is a rotary feeder, 29 is a coarse ash take-off branch pipe, 30 is connected to the branch pipe 29, and the coarse ash discharged from the ash particle size classification device 20 is ashed out of the fly ash silo 9. A coarse ash return pipe to be supplied to the upper part of the side hopper section 12;
2 is a valve.
【００１１】図１に示すように構成された粒径分級形灰
再循環装置においては、フライアッシュサイロ９の灰再
循環側ホッパ部分１３の灰はバルブ１５とロータリフィ
ーダ１７を経て灰粒径分級装置２０に供給され、ブロワ
２５から圧送される空気により、バブリング流動層２３
を形成し、細粒灰は浮上し、粗粒灰は下降し、両者が分
級される。In the ash recirculation apparatus constructed as shown in FIG. 1, ash in the ash recirculation side hopper 13 of the fly ash silo 9 passes through a valve 15 and a rotary feeder 17 to classify ash. The air supplied to the apparatus 20 and pumped from the blower 25 causes the bubbling fluidized bed 23
Is formed, the fine ash floats, the coarse ash descends, and both are classified.
【００１２】したがって、浮上した細粒灰だけが細粒灰
循環管２４から空気輸送により、図示されていない火炉
に戻される。そして、バルブ３２を開にしてブロワ２５
からの空気を粗粒灰戻し管３０にも圧送すると、粗粒灰
取出し分岐管２９からの粗粒灰を該戻し管３０からフラ
イアッシュサイロ９の灰捨側ホッパ部分１２の上部に供
給することができる。Therefore, only the fine ash that has floated is returned to the furnace (not shown) by pneumatic transportation from the fine ash circulation pipe 24. Then, the valve 32 is opened and the blower 25 is opened.
Is supplied to the coarse ash return pipe 30 by pressure, and the coarse ash from the coarse ash extraction branch pipe 29 is supplied from the return pipe 30 to the upper part of the ash removing side hopper portion 12 of the fly ash silo 9. Can be.
【００１３】なおメィンテナンス時に、粗粒灰取出し管
２７などに残留している粗粒灰を排出する必要があると
きは、バルブ３２を閉にして粗粒灰系外排出管３１から
それを系外に排出する。If it is necessary to discharge the coarse ash remaining in the coarse ash extraction pipe 27 during maintenance, the valve 32 is closed and the coarse ash is discharged from the coarse ash outside discharge pipe 31. Discharge outside.
【００１４】このように、図１に示した粒径分級形灰再
循環装置においては、バブリング流動層２３の粒径分級
特性を利用したものであり、流動用空気量を調整し、装
置内空塔速度を任意所望に変えることで、火炉に戻す灰
粒径をコントロールできる。また粗粒灰の一部をフライ
アッシュサイロ９の灰捨側ホッパ部分１２の上部に供給
することもできる。As described above, in the particle size classification type ash recirculation apparatus shown in FIG. 1, the particle size classification characteristic of the bubbling fluidized bed 23 is utilized, and the amount of air for flow is adjusted so that the internal space of the apparatus is reduced. The ash particle size returned to the furnace can be controlled by changing the tower speed as desired. Also, a part of the coarse ash can be supplied to the upper part of the ash-removing-side hopper portion 12 of the fly ash silo 9.
【００１５】[0015]
【発明の効果】以上説明したように本発明によれば、灰
再循環側ホッパ部分および灰捨側ホッパ部分を有するフ
ライアッシュサイロと、前記灰再循環側ホッパ部分から
の灰を導入してバブリング流動層によって細粒灰と粗粒
灰とに分級する灰粒径分級装置と、この灰粒径分級装置
の底部の風箱に分級用空気を圧送するブロワと、前記灰
粒径分級装置で浮上した細粒灰を火炉に戻す細粒灰循環
管とを備えているので、灰は前記灰粒径分級装置で、細
粒灰と粗粒灰に分級され、未燃分の多い細粒灰のみを火
炉へ戻すことができる。As described above, according to the present invention, a fly ash silo having an ash recirculation side hopper portion and an ash rejection side hopper portion, and bubbling by introducing ash from the ash recirculation side hopper portion. An ash particle size classifier for classifying fine ash and coarse ash by a fluidized bed, a blower for pumping air for classification into a wind box at the bottom of the ash particle size classifier, and floating by the ash particle size classifier The ash is classified into fine ash and coarse ash by the ash particle size classification device, and only fine ash with a large amount of unburned matter is provided. Can be returned to the furnace.
【００１６】したがって、本発明によれば、効率的な再
燃焼が可能であって、粒子負荷および動力損失ならびに
摩耗が少ない粒径分級形灰再循環装置を提供することが
できる。Therefore, according to the present invention, it is possible to provide a particle size-classified ash recirculation apparatus which can efficiently reburn and reduce particle load, power loss and wear.
【図１】本発明の一実施例を示した正面断面図である。FIG. 1 is a front sectional view showing one embodiment of the present invention.
【図２】従来の技術の一例を示した全体構成図である。FIG. 2 is an overall configuration diagram showing an example of a conventional technique.
【図３】図２のフライアッシュサイロを拡大して示した
正面断面図である。FIG. 3 is an enlarged front sectional view of the fly ash silo of FIG. 2;
１ ボイラ火炉 ９ フライアッシュサイロ １２ 灰捨側ホッパ部分 １３ 灰再循環側ホッパ部分 ２０ 灰粒径分級装置 ２１ 風箱 ２３ バブリング流動層 ２４ 細粒灰循環管 ２５ ブロワ ３０ 粗粒灰戻し管 DESCRIPTION OF SYMBOLS 1 Boiler furnace 9 Fly ash silo 12 Ash disposal side hopper part 13 Ash recirculation side hopper part 20 Ash particle size classification device 21 Wind box 23 Bubbling fluidized bed 24 Fine ash circulation pipe 25 Blower 30 Coarse ash return pipe
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F23B 5/00 303 F23G 7/00 103 F23J 15/00 Continuation of the front page (58) Field surveyed (Int. Cl. 7 , DB name) F23B 5/00 303 F23G 7/00 103 F23J 15/00
Claims (2)
パ部分を有するフライアッシュサイロと、前記灰再循環
側ホッパ部分からの灰を導入してバブリング流動層によ
って細粒灰と粗粒灰とに分級する灰粒径分級装置と、こ
の灰粒径分級装置の底部の風箱に分級用空気を圧送する
ブロワと、前記灰粒径分級装置で浮上した細粒灰を火炉
に戻す細粒灰循環管とを備えていることを特徴とする、
粒径分級形灰再循環装置。1. A fly ash silo having an ash recirculation side hopper portion and an ash rejection side hopper portion, and fine ash and coarse ash introduced by introducing ash from the ash recycle side hopper portion and bubbling a fluidized bed. Ash particle sizer, a blower for feeding air for classification into a wind box at the bottom of the ash particle sizer, and fine ash that returns fine ash floated by the ash particle sizer to a furnace. Characterized by having a circulation pipe,
Particle size classification ash recirculation device.
イアッシュサイロの灰捨側ホッパ部分の上部に供給する
粗粒灰戻し管を備えている請求項１記載の粒径分級形灰
再循環装置。2. The ash particle size classified ashes according to claim 1, further comprising a coarse ash return pipe for supplying coarse ash discharged from the ash particle size classification device to an upper portion of a ash-removing side hopper portion of a fly ash silo. Recirculation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09632393A JP3173537B2 (en) | 1993-04-23 | 1993-04-23 | Particle size classification ash recirculation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09632393A JP3173537B2 (en) | 1993-04-23 | 1993-04-23 | Particle size classification ash recirculation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06307606A JPH06307606A (en) | 1994-11-01 |
| JP3173537B2 true JP3173537B2 (en) | 2001-06-04 |
Family
ID=14161806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09632393A Expired - Fee Related JP3173537B2 (en) | 1993-04-23 | 1993-04-23 | Particle size classification ash recirculation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3173537B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6695902B2 (en) | 2000-11-14 | 2004-02-24 | Boral Material Technologies, Inc. | Asphalt composites including fly ash fillers or filler blends, methods of making same, and methods for selecting or modifying a fly ash filler for use in asphalt composites |
| US6916863B2 (en) | 2000-11-14 | 2005-07-12 | Boral Material Technologies, Inc. | Filler comprising fly ash for use in polymer composites |
| JP6455290B2 (en) * | 2015-04-08 | 2019-01-23 | 株式会社Ihi | Chemical loop combustion apparatus and chemical loop combustion method |
| CN111878801A (en) * | 2020-08-31 | 2020-11-03 | 北京永博洁净科技有限公司 | Fly ash circulating device and circulating fluidized bed boiler comprising same |
-
1993
- 1993-04-23 JP JP09632393A patent/JP3173537B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06307606A (en) | 1994-11-01 |
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