JPS60251313A - Pulverized coal burner - Google Patents
Pulverized coal burnerInfo
- Publication number
- JPS60251313A JPS60251313A JP10764784A JP10764784A JPS60251313A JP S60251313 A JPS60251313 A JP S60251313A JP 10764784 A JP10764784 A JP 10764784A JP 10764784 A JP10764784 A JP 10764784A JP S60251313 A JPS60251313 A JP S60251313A
- Authority
- JP
- Japan
- Prior art keywords
- pulverized coal
- circulating gas
- burner
- oxygen concentration
- coal burner
- 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
- Disintegrating Or Milling (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、微粉炭機からの微粉炭をボイラで燃焼する微
粉炭燃焼装置の技術分野で利用される。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is utilized in the technical field of pulverized coal combustion equipment that burns pulverized coal from a pulverized coal machine in a boiler.
従来の技術
従来の微粉炭燃焼装置として、第２図に示すようなもの
がある。2. Description of the Related Art A conventional pulverized coal combustion apparatus is shown in FIG.
第２図において、給炭機１より供給された石炭は、微粉
炭機２により粉砕された後、ボイラ３に導入される。こ
のボイラで微粉炭が燃焼され、この燃焼により発生した
排ガスは、空気予熱器４により冷却された後、誘引通風
機５を経て煙突６より大気へ放出される。In FIG. 2, coal supplied from a coal feeder 1 is pulverized by a coal pulverizer 2 and then introduced into a boiler 3. Pulverized coal is combusted in this boiler, and the exhaust gas generated by this combustion is cooled by an air preheater 4, then passed through an induced draft fan 5 and discharged into the atmosphere from a chimney 6.
一方、１次通風機７により昇圧された空気の一部は、２
空気予熱器４に導入されて熱空気８ａとなり、それから
１次通風機７の出口より分岐されて直接導かれた冷空気
８ｂと混合された後、運転中の微粉炭機２内に導入され
る。これら熱空気８ａ及び冷空気８ｂの流量配分は熱空
気ダンパ９ａ及び冷空気ダンパ９ｂの開度にて調整され
、更にそれぞれの空気をしゃ断するための熱空気ゲート
１０ａ及び冷空気ゲー） １０ｂが設置されている。On the other hand, part of the air pressurized by the primary ventilation fan 7 is
The hot air 8a is introduced into the air preheater 4, mixed with cold air 8b which is branched from the outlet of the primary ventilation fan 7 and led directly, and then introduced into the operating pulverizer 2. . The flow rate distribution of these hot air 8a and cold air 8b is adjusted by the opening degree of hot air damper 9a and cold air damper 9b, and hot air gate 10a and cold air gate 10b are installed to cut off each air. has been done.
しかして、微粉炭機２は、その停止状態においては、そ
の内部に石炭が残留していて自然発火することがあり、
これを防止するため、一般に、熱空気ゲー） １０ａを
しゃ断し、これにより微粉炭機内の温度を極力下げるよ
うにしている。However, when the pulverizer 2 is in a stopped state, coal may remain inside and spontaneously ignite.
In order to prevent this, the hot air gauge 10a is generally cut off, thereby lowering the temperature inside the pulverized coal machine as much as possible.
したがって、微粉炭機は停止中に冷え切ってしまい、こ
のため微粉炭機を再び起動する際には、石炭の粉砕・乾
燥を効果的に行うために、事前にウオーミングを行う必
要があり、しかもこのウオーミングには長時間を要し、
迅速な起動ができないという問題があった。Therefore, the pulverized coal machine becomes completely cold while it is stopped, and therefore, when starting the pulverized coal machine again, it is necessary to warm it up in advance in order to effectively crush and dry the coal. This warming takes a long time,
There was a problem that it could not be started quickly.
発明が解決しようとする問題点
本発明は、以上述べた従来技術に鑑み、微粉炭機の停止
後における再起動をウオーミングなしに迅速に行い得る
ようにすることにある。Problems to be Solved by the Invention In view of the prior art described above, the present invention has an object to enable a pulverized coal machine to be restarted quickly after being stopped without warming.
問題点を解決するための手段
本発明は、停止中の微粉炭機に酸素濃度の低いボイラ排
ガスを導入し、これにより安全に暖機状態に保持してお
くようにしたものである。Means for Solving the Problems In the present invention, boiler exhaust gas with a low oxygen concentration is introduced into a stopped pulverizer, thereby safely keeping it warmed up.
実施例
次に、第１図を参照して本発明の一実施例について詳述
する。第１図において、第２図に示したものと同一の部
分には同一の参照符号を付して、その詳細な説明は省略
する。Embodiment Next, an embodiment of the present invention will be described in detail with reference to FIG. In FIG. 1, the same parts as those shown in FIG. 2 are given the same reference numerals, and detailed explanation thereof will be omitted.
第１図において、誘引通風機５と煙突６とを接続する管
路１１から管路１２が分岐され、この循環ガス管路１２
は循環ガス冷却器１３、循環ガスファン１４．循環ガス
ゲート１５及び循環ガスダンパ１６を経て微粉炭機２に
接続されている。In FIG. 1, a pipe 12 is branched from a pipe 11 connecting an induced draft fan 5 and a chimney 6, and this circulating gas pipe 12
are a circulating gas cooler 13 and a circulating gas fan 14. It is connected to the pulverizer 2 via a circulating gas gate 15 and a circulating gas damper 16.
その作用について説明すると、微粉炭機２を停止してい
る場合は、熱空気ゲー） １０ａ及び冷空気ゲー） １
０ｂをしゃ断し、酸素濃度の高い空気が微粉炭機内に流
入するのを防止する。一方、循環ガスファン１４を運転
するとともに、循環ガスゲート１５を開けることにより
、微粉炭機２内へ循環ガスを導入し、微粉炭機を常に暖
機状態に維持しておく。この循環ガスは、酸素濃度が一
般に１０チ程度もしくはそれ以下であるので、火災・爆
発の心配は無い。To explain its action, when the pulverizer 2 is stopped, hot air gage) 10a and cold air gage) 1
0b to prevent air with high oxygen concentration from flowing into the pulverized coal machine. On the other hand, by operating the circulating gas fan 14 and opening the circulating gas gate 15, circulating gas is introduced into the pulverized coal machine 2, and the pulverized coal machine is always maintained in a warmed-up state. This circulating gas generally has an oxygen concentration of about 10 g or less, so there is no risk of fire or explosion.
実際の運用においては、微粉炭機２の温度を適温（約６
５〜８０℃）に維持することが重要であり、これは次に
述べる３つの方法のうちいずれかの方法により達成でき
、どの方法を使用するかは循環ガスの温度及び酸素濃度
などを考慮して適当に決定される。また、微粉炭機の温
度は例えば図示するように微粉炭機本体に取付けたメタ
ル温度計１７により検出することができる。しかし、こ
れに代えて、微粉炭機２の出口部にガス温度計を設けて
も良い。In actual operation, the temperature of the pulverizer 2 should be set to an appropriate temperature (approximately 6
It is important to maintain the temperature between 5 and 80℃, and this can be achieved by one of the following three methods. Which method to use should be determined by considering the temperature of the circulating gas, oxygen concentration, etc. be determined appropriately. Further, the temperature of the pulverizer can be detected, for example, by a metal thermometer 17 attached to the pulverizer main body as shown in the figure. However, instead of this, a gas thermometer may be provided at the outlet of the pulverizer 2.
（１）循環ガス冷却器１３の冷却媒体（空気、水等）の
調整により、循環ガスの温度を調整する。(1) The temperature of the circulating gas is adjusted by adjusting the cooling medium (air, water, etc.) of the circulating gas cooler 13.
（２）循環ガスダンパ１６を調整することにより、微粉
炭機内に流入する循環ガス量を増減させる。更に必要に
応じて、循環ガスタート１５の開閉操作を間欠的に行う
。(2) By adjusting the circulating gas damper 16, the amount of circulating gas flowing into the pulverized coal machine is increased or decreased. Furthermore, the opening and closing operations of the circulation gas start 15 are performed intermittently as necessary.
（３）循環ガスの酸素濃度を微粉炭機出口に設置した酸
素濃度計１８により検出し、これが十分に低ければ、冷
空気ゲー） １０ｂを開けて、一部冷空気８ｂを導入し
、循環ガスの温度調整用に使用する。(3) Detect the oxygen concentration of the circulating gas with the oxygen concentration meter 18 installed at the outlet of the pulverizer, and if it is low enough, open the cold air gauge 10b, introduce some cold air 8b, Used for temperature adjustment.
なお、以上述べた実施例において、循環ガス冷却器１３
及び循環ガスファン１４は場合によっては省略できるも
のである。In addition, in the embodiment described above, the circulating gas cooler 13
The circulating gas fan 14 may be omitted depending on the case.
発明の効果
本発明によれば、以上述べたように、微粉炭機の停止中
においても、微粉炭機温度を常に暖機状態に維持してお
くことができるので、起動前に改めてウオーミングを長
い時間をかけて行う必要がなく、シたがって微粉炭機の
迅速な起動が可能とEffects of the Invention According to the present invention, as described above, even when the pulverizer is stopped, the pulverizer temperature can be maintained at a warm state at all times, so it is not necessary to warm up the pulverizer again for a long time before starting it. There is no need to spend a lot of time on this process, and the pulverizer can therefore be started up quickly.
第１図は本発明による微粉炭燃焼装置の一例を示す系統
図、第２図は従来例を示す系統図である。
２争・微粉炭機、３・・ボイラ、１２・・循環ガス管路
、１３・・循環ガス冷却器、１４・・循環ガスファン、
１５・・循環ガスゲート、１６・・循環ガスダンパ。
復代理人 木村正巴じ
゛′ｌシＰ
（ほか２名）FIG. 1 is a system diagram showing an example of a pulverized coal combustion apparatus according to the present invention, and FIG. 2 is a system diagram showing a conventional example. 2. Pulverizer, 3. Boiler, 12. Circulating gas pipeline, 13. Circulating gas cooler, 14. Circulating gas fan,
15... Circulating gas gate, 16... Circulating gas damper. Sub-agent: Masato Kimura Ji゛'lshiP (and 2 others)
Claims (1)
置において、微粉炭機の停止中にこの微粉炭機内に酸素
濃度の低いボイラ排ガスを導入する手段を具備してなる
微粉炭燃焼装置。A pulverized coal combustion device for burning pulverized coal from a pulverized coal machine in a boiler, the pulverized coal combustion device comprising means for introducing boiler exhaust gas with a low oxygen concentration into the pulverized coal machine while the pulverized coal machine is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107647A JPH0692814B2 (en) | 1984-05-29 | 1984-05-29 | Pulverized coal combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107647A JPH0692814B2 (en) | 1984-05-29 | 1984-05-29 | Pulverized coal combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60251313A true JPS60251313A (en) | 1985-12-12 |
| JPH0692814B2 JPH0692814B2 (en) | 1994-11-16 |
Family
ID=14464488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59107647A Expired - Lifetime JPH0692814B2 (en) | 1984-05-29 | 1984-05-29 | Pulverized coal combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0692814B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008068883A1 (en) * | 2006-12-07 | 2008-06-12 | Ihi Corporation | Coal burning boiler apparatus |
| JP2014104395A (en) * | 2012-11-26 | 2014-06-09 | Hyuga Seirensho:Kk | System and method for preventing coal dust firing in pulverized coal mill equipment |
| CN106362847A (en) * | 2016-10-21 | 2017-02-01 | 江中药业股份有限公司 | Constant-temperature constant-humidity air intake type smashing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864409A (en) * | 1981-10-15 | 1983-04-16 | Mitsubishi Heavy Ind Ltd | Pulverized coal firing boiler |
| JPS5858241U (en) * | 1981-10-12 | 1983-04-20 | 三菱重工業株式会社 | Pulverized coal machine warming device |
| JPS5922659A (en) * | 1982-07-29 | 1984-02-04 | バブコツク日立株式会社 | Continuous coal crusher |
-
1984
- 1984-05-29 JP JP59107647A patent/JPH0692814B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858241U (en) * | 1981-10-12 | 1983-04-20 | 三菱重工業株式会社 | Pulverized coal machine warming device |
| JPS5864409A (en) * | 1981-10-15 | 1983-04-16 | Mitsubishi Heavy Ind Ltd | Pulverized coal firing boiler |
| JPS5922659A (en) * | 1982-07-29 | 1984-02-04 | バブコツク日立株式会社 | Continuous coal crusher |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008068883A1 (en) * | 2006-12-07 | 2008-06-12 | Ihi Corporation | Coal burning boiler apparatus |
| JP2008145007A (en) * | 2006-12-07 | 2008-06-26 | Ihi Corp | Coal burning boiler |
| JP2014104395A (en) * | 2012-11-26 | 2014-06-09 | Hyuga Seirensho:Kk | System and method for preventing coal dust firing in pulverized coal mill equipment |
| CN106362847A (en) * | 2016-10-21 | 2017-02-01 | 江中药业股份有限公司 | Constant-temperature constant-humidity air intake type smashing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0692814B2 (en) | 1994-11-16 |
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