JPH0533922A - Air-supplying device for combustion apparatus using slack coal - Google Patents

Air-supplying device for combustion apparatus using slack coal

Info

Publication number
JPH0533922A
JPH0533922A JP3186313A JP18631391A JPH0533922A JP H0533922 A JPH0533922 A JP H0533922A JP 3186313 A JP3186313 A JP 3186313A JP 18631391 A JP18631391 A JP 18631391A JP H0533922 A JPH0533922 A JP H0533922A
Authority
JP
Japan
Prior art keywords
air
combustion
furnace
coal
pulverized coal
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.)
Withdrawn
Application number
JP3186313A
Other languages
Japanese (ja)
Inventor
Masashi Hishida
正志 菱田
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP3186313A priority Critical patent/JPH0533922A/en
Publication of JPH0533922A publication Critical patent/JPH0533922A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

PURPOSE:To supply air for burning to the upper part of a major combustion region at an adequate flow speed without using an air pressure-raising fan specially provided for that purpose, in the title combustion apparatus for a coal-burning boiler or the like. CONSTITUTION:In a combustion apparatus using slack coal, part of air for burning is supplied to the interior of a furnace through a burner part 3. The combustion apparatus has an air pressure-raising fan 4 whereby air for drying, pulverizing and conveying is supplied to a slack coal-producing apparatus annexed through an air preheater 6, a branch pipe-line 7 whereby the air out of the air preheater 6 is supplied to the upper part 2 of a major combustion region in the furnace, and a flow control damper 5 provided on the branch pipe-line 7.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は、石炭焚きボイラ等の粉
炭燃焼装置における空気投入装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air charging device in a pulverized coal combustion device such as a coal-fired boiler.
【0002】[0002]
【従来の技術】燃焼装置において、NOX の低減と未燃
分の低減は一般に表裏をなすものであり、主燃焼域の空
気を減らせばNOX は低減可能である未燃分が増加す
る。このために、未燃分を減らす目的で、燃焼用空気の
一部として分岐した空気を主燃焼域上部へ投入すること
が行なわれている。
2. Description of the Related Art In a combustion apparatus, the reduction of NO X and the reduction of unburned matter are generally opposite sides. If the air in the main combustion region is reduced, the unburned matter which can reduce NO X increases. For this reason, in order to reduce the unburned content, air branched as a part of the combustion air is introduced into the upper part of the main combustion area.
【0003】この種の従来の技術を、図2及び図3に示
す。図2に石炭焚きボイラ010への空気投入装置が示
されており、押込みファン01で昇圧された空気は、空
気予熱器06で予熱された上、燃焼用空気としてボイラ
010のバーナ部03から炉内へ投入される。空気予熱
器06を出た燃焼用空気の一部は分岐され、ブースタフ
ァン05aで昇圧して炉内の主燃焼域の上部02へ投入
される。04は昇圧ファンで、同ファン04で昇圧され
た空気は、空気予熱器06で予熱された上、微粉炭製造
装置へ供給される。
A conventional technique of this kind is shown in FIGS. FIG. 2 shows an air charging device for the coal-fired boiler 010. The air boosted by the pushing fan 01 is preheated by the air preheater 06, and is also burned as air from the burner section 03 of the boiler 010 to the furnace. It is thrown in. A part of the combustion air that has exited the air preheater 06 is branched, boosted by the booster fan 05a, and injected into the upper part 02 of the main combustion zone in the furnace. Reference numeral 04 denotes a booster fan. The air boosted by the fan 04 is preheated by the air preheater 06 and then supplied to the pulverized coal manufacturing apparatus.
【0004】図3にも、従来の石炭焚きボイラ010へ
の空気投入装置が示されており、この装置は、前記図2
に示す装置におけるブースタファン5aを省略し、空気
予熱器06からバーナ部03への管路に流量分配ダンパ
5bを設け、これによって主燃焼域の上部02への空気
を確保するようにしている。
FIG. 3 also shows an air feeding device for a conventional coal-fired boiler 010, which is shown in FIG.
The booster fan 5a in the device shown in (3) is omitted, and a flow distribution damper 5b is provided in the conduit from the air preheater 06 to the burner section 03, thereby ensuring air to the upper part 02 of the main combustion region.
【0005】[0005]
【発明が解決しようとする課題】バーナ部へ供給される
燃焼用空気の一部を分岐して主燃焼域の上部へ投入する
前記の石炭焚きボイラでは、炉内燃焼ガスと主燃焼域の
上部への投入空気の混合、拡散が十分行われる必要があ
り、投入空気の吹込み流速を高くとる必要がある。しか
し、この吹込み流速を早くする程、系統のドラフトロス
が増加するためこれに見合った容量のファンを設ける必
要がある。
In the above coal-fired boiler in which a part of the combustion air supplied to the burner is branched and introduced into the upper part of the main combustion zone, the combustion gas in the furnace and the upper part of the main combustion zone are used. It is necessary to sufficiently mix and diffuse the input air into the chamber, and it is necessary to increase the blowing velocity of the input air. However, since the draft loss of the system increases as the blowing velocity increases, it is necessary to install a fan having a capacity corresponding to this.
【0006】従って、図2に示す従来のボイラでは、専
用のブースタファン05aを設け、また、図3に示す従
来のボイラでは、燃焼用空気を供給するための押込みフ
ァン01のヘッドを高くとることで対応しているが、こ
れによって、専用の機器を必要としたり、装置が大型化
するという問題点があった。
Therefore, in the conventional boiler shown in FIG. 2, a dedicated booster fan 05a is provided, and in the conventional boiler shown in FIG. 3, the head of the pushing fan 01 for supplying the combustion air is set high. However, due to this, there are problems that a dedicated device is required and the device becomes large.
【0007】本発明は、以上の問題点を解決することが
できる粉炭燃焼装置の空気投入装置を提供しようとする
ものである。
An object of the present invention is to provide an air charging device for a pulverized coal combustion apparatus which can solve the above problems.
【0008】[0008]
【課題を解決するための手段】本発明の粉炭燃焼装置に
おける空気投入装置は、燃焼用空気の一部がバーナ部か
ら炉内へ投入される粉炭燃焼装置において、空気予熱器
を経て付設された粉炭製造装置へ乾燥、粉砕、搬送用の
空気を供給する空気昇圧ファン、前記空気予熱器を出た
空気を炉内の主燃焼域上部へ供給する分岐管路、及び同
分岐管路に設けられた流量制御ダンパを備えたことを特
徴とする。
The air charging device in the pulverized coal combustion apparatus of the present invention is provided with an air preheater in the pulverized coal combustion apparatus in which a part of the combustion air is introduced into the furnace from the burner section. An air booster fan that supplies air for drying, pulverizing, and conveying to the pulverized coal manufacturing apparatus, a branch pipe line that supplies the air that exits the air preheater to the upper part of the main combustion zone in the furnace, and a branch pipe line that is provided. It is characterized by having a flow rate control damper.
【0009】[0009]
【課題を解決するための手段】石炭焚きボイラ等の粉炭
燃焼装置では石炭を乾燥、粉砕、搬送する粉炭製造装置
が付設されており、これに昇圧された空気を供給する空
気昇圧ファンがある。このファンのヘッドは、粉炭製造
装置が通常ミルや粉炭管を含むため1500mmAq程度と
高い。
In a pulverized coal combustion apparatus such as a coal-fired boiler, a pulverized coal manufacturing apparatus for drying, crushing and transporting coal is attached, and there is an air booster fan for supplying pressurized air to the pulverized coal manufacturing apparatus. The head of this fan is as high as about 1500 mmAq because the pulverized coal manufacturing apparatus usually includes a mill and a pulverized coal pipe.
【0010】本発明では、この空気昇圧ファンで昇圧さ
れ空気予熱器で予熱された空気の一部を分岐管路によっ
て炉内の主燃焼域上部へ供給しているので、新たな専用
ファンを設置したり押込みファンのヘッドを高くする必
要はない。また、昇圧された空気は、吹込み速度が高い
状態で炉内の主燃焼域上部へ投入されることゝなり、こ
れによって、炉内燃焼ガスと投入空気の混合、拡散が十
分に行なわれる。
In the present invention, since a part of the air that has been boosted by the air booster fan and preheated by the air preheater is supplied to the upper part of the main combustion zone in the furnace by the branch pipe, a new dedicated fan is installed. There is no need to raise or raise the head of the pushing fan. Further, the pressurized air is injected into the upper part of the main combustion zone in the furnace at a high blowing speed, whereby the combustion gas in the furnace and the input air are sufficiently mixed and diffused.
【0011】また更に、分岐管路に設けられた流量制御
ダンパによって、粉炭製造装置と炉内の主燃焼域上部へ
の空気流量が調整され、必要な流量の空気が粉炭製造装
置と炉内の主燃焼域へと分配される。
Furthermore, the flow rate control damper provided in the branch pipe adjusts the flow rate of air to the upper part of the main combustion zone in the pulverized coal production apparatus and the furnace, so that the required amount of air is supplied between the pulverized coal production apparatus and the furnace. It is distributed to the main combustion zone.
【0012】[0012]
【実施例】本発明の一実施例を、図1によって説明す
る。1は押込みファンで、同ファン1は空気予熱器6を
経て燃焼用空気を石炭焚きボイラ10のバーナ部3へ供
給するようになっている。4は空気昇圧ファンで、同フ
ァン4は空気予熱器6を経て昇圧された空気を管路8よ
り図示しない微粉炭製造装置へ供給するようになってい
る。同管路8からは、流量制御ダンパ5をもつ分岐管路
7が分岐し、同分岐管路7は、ボイラ10の主燃焼域2
の上部へ空気を投入するようになっている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. Reference numeral 1 denotes a push-in fan, which is adapted to supply combustion air to a burner section 3 of a coal-fired boiler 10 via an air preheater 6. Reference numeral 4 is an air booster fan, and the fan 4 is configured to supply the air, which has been boosted through an air preheater 6, from a pipeline 8 to a pulverized coal manufacturing apparatus (not shown). From the pipe line 8, a branch pipe line 7 having a flow control damper 5 branches, and the branch pipe line 7 is a main combustion zone 2 of the boiler 10.
It is designed to inject air into the upper part of.
【0013】本実施例では、空気昇圧ファン4は、空気
を1500mmAq程度のヘッドに昇圧して微粉炭製造装置
へ供給する。この昇圧された空気の一部は分岐管路7を
経て、ボイラ10の主燃焼域の上部2へ投入される。こ
のように、十分に昇圧した空気を主燃焼域の上部2へ投
入することによって炉内への吹込み速度が大きくなり、
炉内の燃焼ガスと投入された空気の混合、拡散が十分に
行われ、NOX の発生量を抑えながら、未燃分の発生を
低減させることができる。また、投入空気と燃焼ガスの
混合に要する空間も低減してボイラ10のコンパクト化
を計ることもできる。
In the present embodiment, the air boosting fan 4 boosts the pressure of air to a head of about 1500 mmAq and supplies it to the pulverized coal manufacturing apparatus. A part of the pressurized air is introduced into the upper portion 2 of the main combustion region of the boiler 10 via the branch pipe line 7. In this way, by injecting the air whose pressure has been sufficiently increased into the upper part 2 of the main combustion region, the blowing speed into the furnace is increased,
Mixing of air introduced with the combustion gases in the furnace, diffusion is performed sufficiently, while suppressing the generation amount of NO X, it is possible to reduce the generation of unburned. Further, the space required for mixing the input air and the combustion gas can be reduced, and the boiler 10 can be made compact.
【0014】また、分岐管路7に設けられた流量制御ダ
ンパ5によって、必要流量の空気を、主燃焼域の上部2
と微粉炭燃焼装置へ配分することができる。
Further, a flow control damper 5 provided in the branch pipe 7 causes a required flow of air to flow into the upper portion 2 of the main combustion region.
And can be distributed to pulverized coal combustion equipment.
【0015】更に、本実施例では、微粉炭製造装置に必
要な空気昇圧ファン4により昇圧された空気の一部を主
燃焼域の上部2に供給しているために、燃焼用空気の押
込みファンのヘッドを高くしたり、専用な昇圧ファンを
設ける必要がない。
Further, in this embodiment, since a part of the air boosted by the air boosting fan 4 required for the pulverized coal manufacturing apparatus is supplied to the upper portion 2 of the main combustion region, the combustion air pushing fan is driven. There is no need to raise the head or install a dedicated booster fan.
【0016】[0016]
【発明の効果】本発明によれば、炉内の主燃焼域上部へ
投入される燃焼用空気に高いヘッドが得られるため、炉
内への吹込み流速を高くとれることから、投入空気と炉
内ガスの混合を短時間の内に十分行うことができる。こ
れにより多量の空気を主燃焼域上部から投入することで
NOX の低減を計ると共に未燃分の発生を最小限に抑え
ることができ、また、混合に要する空間、換言すれば滞
留時間の低減が可能となるので火炉のコンパクト化を計
ることができる。
According to the present invention, since a high head can be obtained for the combustion air injected into the upper part of the main combustion zone in the furnace, the flow velocity of the air blown into the furnace can be made high. It is possible to sufficiently mix the internal gas within a short time. As a result, a large amount of air is injected from the upper part of the main combustion zone to reduce NO X and to minimize the generation of unburned components. In addition, the space required for mixing, in other words, the retention time is reduced. It is possible to make the furnace compact.
【0017】また、粉炭製造装置への空気昇圧ファンに
よって昇圧された空気の一部を前記の主燃焼域上部へ投
入される燃焼用空気としているために、特別の空気昇圧
ファンを設ける必要がなく、装置が簡単となり、かつ、
そのコストを下げることができる。
Further, since a part of the air boosted by the air booster fan for the pulverized coal manufacturing apparatus is used as the combustion air to be injected into the upper part of the main combustion zone, it is not necessary to provide a special air booster fan. , The device is simple, and
The cost can be reduced.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の一実施例の説明図である。FIG. 1 is an explanatory diagram of an embodiment of the present invention.
【図2】従来の石炭焚きボイラの空気投入装置の一例の
説明図である。
FIG. 2 is an explanatory diagram of an example of a conventional air charging device for a coal-fired boiler.
【図3】従来の石炭焚きボイラの空気投入装置の他の例
の説明図である。
FIG. 3 is an explanatory view of another example of a conventional air charging device for a coal-fired boiler.
【符号の説明】[Explanation of symbols]
1 押込みファン 2 主燃焼域の上部 3 バーナ部 4 空気昇圧ファン 5 流量制御ダンパ 6 空気予熱器 7 分岐管路 8 管路 10 石炭焚きボイラ 1 Indentation fan 2 Upper part of main combustion area 3 Burner part 4 Air booster fan 5 Flow control damper 6 Air preheater 7 Branch pipe line 8 Pipe line 10 Coal fired boiler

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 燃焼用空気の一部がバーナ部から炉内へ
    投入される粉炭燃焼装置において、空気予熱器を経て付
    設された粉炭製造装置へ乾燥、粉砕、搬送用の空気を供
    給する空気昇圧ファン、前記空気予熱器を出た空気を炉
    内の主燃焼域上部へ供給する分岐管路、及び同分岐管路
    に設けられた流量制御ダンパを備えたことを特徴とする
    粉炭燃焼装置における空気投入装置。
    Claims: 1. A pulverized coal combustion apparatus in which a part of combustion air is introduced into a furnace from a burner section, for drying, pulverizing, and conveying to a pulverized coal manufacturing apparatus attached through an air preheater. An air booster fan for supplying the above air, a branch pipe for supplying the air discharged from the air preheater to the upper part of the main combustion zone in the furnace, and a flow rate control damper provided in the branch pipe. An air injection device in a pulverized coal combustion device.
JP3186313A 1991-07-25 1991-07-25 Air-supplying device for combustion apparatus using slack coal Withdrawn JPH0533922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3186313A JPH0533922A (en) 1991-07-25 1991-07-25 Air-supplying device for combustion apparatus using slack coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3186313A JPH0533922A (en) 1991-07-25 1991-07-25 Air-supplying device for combustion apparatus using slack coal

Publications (1)

Publication Number Publication Date
JPH0533922A true JPH0533922A (en) 1993-02-09

Family

ID=16186151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3186313A Withdrawn JPH0533922A (en) 1991-07-25 1991-07-25 Air-supplying device for combustion apparatus using slack coal

Country Status (1)

Country Link
JP (1) JPH0533922A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100818601B1 (en) * 2007-11-23 2008-04-02 (주)율진이엔지 Red phospher, method of preparation thereof, and white ligth emitting device comprising the same
CN106439794A (en) * 2016-09-30 2017-02-22 浙江浙能技术研究院有限公司 Air distribution method and system reducing NOX emission and relieving coking
CN106642083A (en) * 2016-09-30 2017-05-10 浙江浙能技术研究院有限公司 Side over fire air distribution method and coal-fired boiler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100818601B1 (en) * 2007-11-23 2008-04-02 (주)율진이엔지 Red phospher, method of preparation thereof, and white ligth emitting device comprising the same
CN106439794A (en) * 2016-09-30 2017-02-22 浙江浙能技术研究院有限公司 Air distribution method and system reducing NOX emission and relieving coking
CN106642083A (en) * 2016-09-30 2017-05-10 浙江浙能技术研究院有限公司 Side over fire air distribution method and coal-fired boiler

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Effective date: 19981008