JPH0225610A - Desulfurizing method and device in cyclone type coal combustion furnace - Google Patents
Desulfurizing method and device in cyclone type coal combustion furnaceInfo
- Publication number
- JPH0225610A JPH0225610A JP17655188A JP17655188A JPH0225610A JP H0225610 A JPH0225610 A JP H0225610A JP 17655188 A JP17655188 A JP 17655188A JP 17655188 A JP17655188 A JP 17655188A JP H0225610 A JPH0225610 A JP H0225610A
- Authority
- JP
- Japan
- Prior art keywords
- cyclone
- furnace
- combustion
- gas
- combustion furnace
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000003245 coal Substances 0.000 title claims description 41
- 230000003009 desulfurizing effect Effects 0.000 title claims description 11
- 239000007789 gas Substances 0.000 claims abstract description 26
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 19
- 230000023556 desulfurization Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000000567 combustion gas Substances 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 150000003464 sulfur compounds Chemical class 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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、微粉オイルコークスなどの固体燃料
（以下、単に石炭という）を燃焼用旋回空気により燃焼
させるサイクロン石炭燃焼炉における排ガスの脱硫方法
およびその装置に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is a method for reducing exhaust gas in a cyclone coal combustion furnace in which solid fuel such as pulverized coal or pulverized oil coke (hereinafter simply referred to as coal) is combusted by swirling air for combustion. This invention relates to a desulfurization method and apparatus.
従来から、ボイラ火炉などの工業炉においては、炉本体
に前炉（−火炉）としてサイクロン石炭燃焼炉を設けて
石炭を部分燃焼させるようにしたものが知られている。BACKGROUND ART Conventionally, industrial furnaces such as boiler furnaces are known in which a cyclone coal combustion furnace is provided as a front furnace (-furnace) in the furnace body to partially burn coal.
このような前炉を備えた工業炉（二次炉）は、燃焼効果
が優れたものであることから、広く用いられている。Industrial furnaces (secondary furnaces) equipped with such forehearths are widely used because of their excellent combustion effects.
上記の従来型のサイクロン石炭燃焼炉の構造を示すもの
として、たとえば先に提案した実開昭６０７６７１７号
公報に示されるように、微粉炭と空気とをサイクロン石
炭燃焼炉内に供給するとともに、これらを高速旋回流と
して効果的に混合して燃焼させることにより、微粉炭を
部分燃焼させる構造のものが開示されている。すなわち
、第３図に示すように、ボイラ火炉などの火炉（二次炉
）１の側壁にサイクロン本体２を横方向に取り付け、こ
のサイクロン本体に石炭投入口３、燃焼用旋回空気供給
口４および燃焼ガスを火炉へ導くガス導通口５を設け、
サイクロン本体２の内部に、この本体２内で発生する燃
焼ガスを通過させ溶融スラグをせき止めるためのスラグ
バッフル６を設けるとともに、スラグバッフルの燃焼ガ
ス上流側に下向きのスラグ流下ロアを設けたサイクロン
石炭燃焼炉８が記載されている。１０はスラグタンク、
１１は燃焼室、１２はバイパスライン、１３は火炎であ
る。As an example of the structure of the conventional cyclone coal combustion furnace described above, as shown in the previously proposed Japanese Utility Model Application Publication No. 6076717, pulverized coal and air are supplied into the cyclone coal combustion furnace, and A structure is disclosed in which pulverized coal is partially combusted by effectively mixing and combusting pulverized coal as a high-speed swirling flow. That is, as shown in FIG. 3, a cyclone main body 2 is attached laterally to the side wall of a furnace (secondary furnace) 1 such as a boiler furnace, and a coal input port 3, a swirling air supply port 4 for combustion, and a combustion swirling air supply port 4 are attached to the cyclone main body. A gas passage port 5 is provided to guide combustion gas to the furnace,
The cyclone coal is provided with a slag baffle 6 inside the cyclone body 2 for passing combustion gas generated within the body 2 and damming up molten slag, and a downward slag flow lower lower on the combustion gas upstream side of the slag baffle. A combustion furnace 8 is described. 10 is a slag tank,
11 is a combustion chamber, 12 is a bypass line, and 13 is a flame.
〔発明が解決しようとする問題点〕
上記のサイクロン燃焼炉において、燃焼排ガス中には、
燃料中の硫黄分に起因する硫黄化合物が含まれるので、
これを効率よく除去する必要がある。[Problems to be solved by the invention] In the above cyclone combustion furnace, the combustion exhaust gas contains:
Contains sulfur compounds caused by the sulfur content in fuel,
It is necessary to remove this efficiently.
従来、脱硫剤粉末は、微粉炭などの固体燃料搬送系統ま
たは燃焼用空気の系統に混入して、サイクロン石炭燃焼
炉に導入されていたが、この場合には、脱硫剤が局部的
に燃焼反応の盛んな極めて高温の酸化・還元雰囲気を通
過するため、脱硫性能の活性が劣化（死活）し易く、脱
硫効果を高めることが困難であった。Conventionally, desulfurization agent powder was introduced into a cyclone coal combustion furnace by being mixed into the solid fuel conveyance system such as pulverized coal or the combustion air system, but in this case, the desulfurization agent caused a local combustion reaction. Because it passes through an extremely high-temperature oxidizing/reducing atmosphere with a lot of carbon dioxide, the desulfurization activity tends to deteriorate (dead), making it difficult to increase the desulfurization effect.
本発明は上記の点に鑑みなされたもので、サイクロン石
炭燃焼炉からの燃焼ガスの一部を冷却した後、ブースタ
ポンプで昇圧し、これを搬送媒体として石灰石などの脱
硫剤の粉末をサイクロン石炭燃焼炉の燃焼ガス出口近傍
の高温還元ゾーンから分散・投入し、ＣａＳの生成量を
増大せしめ、脱硫性能の向上を図るようにしたサイクロ
ン石炭燃焼炉における脱硫方法およびその装置を提供す
ることを目的とするものである。The present invention was made in view of the above points. After cooling a part of the combustion gas from a cyclone coal combustion furnace, the pressure is increased by a booster pump, and this is used as a conveying medium to transfer powder of a desulfurization agent such as limestone to the cyclone coal combustion furnace. The purpose of the present invention is to provide a desulfurization method and device for a cyclone coal combustion furnace in which CaS is dispersed and introduced from a high temperature reduction zone near the combustion gas outlet of the combustion furnace to increase the amount of CaS produced and improve desulfurization performance. That is.
〔問題点を解決するための手段および作用〕上記の目的
を達成するために、本発明のサイクロン石炭燃焼炉にお
ける脱硫装置は、図面に示すように、二次炉１の側壁に
サイクロン本体２を横方向に取り付け、このサイクロン
本体に石炭投入口３、燃焼用旋回空気供給口４、燃焼ガ
スを二次炉へ導くガス導通口５およびスラグ流下ロアを
設けたサイクロン石炭燃焼炉８において、サイクロン石
炭燃焼炉８と火炉１との接続ダクト１４に分岐ダクト１
５を設け、この分岐ダクトを排ガスクーラ１６、ブース
タポンプ１７およびエジェクタ１８を介してサイクロン
石炭燃焼炉８のガス導通口５近傍の高温還元ゾーン２０
に接続し、エジェクタ１８に脱硫剤粉末ホッパ２１を接
続して形成したものである。２２はロータリバルブであ
る。[Means and operations for solving the problems] In order to achieve the above object, the desulfurization device for the cyclone coal combustion furnace of the present invention has a cyclone body 2 on the side wall of the secondary furnace 1, as shown in the drawings. In a cyclone coal combustion furnace 8 which is installed laterally and has a coal input port 3, a swirling air supply port 4 for combustion, a gas communication port 5 for guiding combustion gas to the secondary furnace, and a slag flow lower lower in the cyclone main body, the cyclone coal A branch duct 1 is connected to the connecting duct 14 between the combustion furnace 8 and the furnace 1.
5 is provided, and this branch duct is connected to a high temperature reduction zone 20 near the gas inlet 5 of the cyclone coal combustion furnace 8 via an exhaust gas cooler 16, a booster pump 17 and an ejector 18.
The desulfurizing agent powder hopper 21 is connected to the ejector 18. 22 is a rotary valve.
上記のように構成された装置において、サイクロン石炭
燃焼炉８からの燃焼ガスの一部を抜き出して冷却した後
、昇圧し、昇圧された燃焼ガスを搬送媒体として脱硫剤
粉末をサイクロン石炭燃焼炉のガス溝道口近傍の高温還
元ゾーン２０に分散・投入する。In the apparatus configured as described above, a part of the combustion gas from the cyclone coal combustion furnace 8 is extracted, cooled, and then pressurized, and the desulfurizing agent powder is transferred to the cyclone coal combustion furnace using the pressurized combustion gas as a carrier medium. It is dispersed and introduced into the high temperature reduction zone 20 near the gas ditch entrance.
分散・投入された脱硫剤粉末は、排ガス中の硫黄化合物
と効率よく反応してＣａＳとなり除去される。The dispersed and charged desulfurizing agent powder reacts efficiently with sulfur compounds in the exhaust gas to become CaS and is removed.
以下、図面を参照して本発明の好適な実施例を詳細に説
明する。ただしこの実施例に記載されている構成機器の
形状、その相対配置などは、とくに特定的な記載がない
限りは、本発明の範囲をそれらのみに限定する趣旨のも
のではなく、単なる説明例にすぎない。Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, unless there is a specific description, the shapes of the components described in this example, their relative positions, etc. are not intended to limit the scope of the present invention to these, but are merely illustrative examples. Only.
実施例１ 第１図は本発明の装置の一実施例を示している。Example 1 FIG. 1 shows an embodiment of the device of the invention.
８は第３図に示すものと同じ構造のサイクロン石炭燃焼
炉で、この燃焼炉８と二次炉１との接続ダクト１４に分
岐ダクト１５を設け、この分岐ダクトを排ガスクーラ１
６、ブースタポンプ１７およびエジェクタ１８を介して
燃焼炉８のガス導道口５近傍の高温還元ゾーン２０に接
続している。またエジェクタ１８にはロータリバルブ２
２を介してＣａｃｔｓなどの脱硫剤の粉末を貯留する脱
硫剤粉末ホフバ２１が接続されている。Reference numeral 8 designates a cyclone coal combustion furnace having the same structure as that shown in FIG.
6. It is connected via a booster pump 17 and an ejector 18 to a high temperature reduction zone 20 near the gas conduit 5 of the combustion furnace 8. In addition, the ejector 18 has a rotary valve 2.
A desulfurizing agent powder hopper 21 that stores desulfurizing agent powder such as Cacts is connected via 2 .
分岐ダクト１５により抜き出された排ガスは、排ガスク
ーラ１６により冷却された後、ブースタポンプ１７で昇
圧され、エジェクタ１８に送られる。ロークリバルブ２
２を開とすると、ホッパ２１内の脱硫剤粉末がエジェク
タ１８内に吸引され、高温還元ゾーン２０に分散・投入
される。The exhaust gas extracted through the branch duct 15 is cooled by an exhaust gas cooler 16, then pressurized by a booster pump 17, and sent to an ejector 18. Low revalve 2
2 is opened, the desulfurizing agent powder in the hopper 21 is sucked into the ejector 18 and dispersed and thrown into the high temperature reduction zone 20.
実施例２
本例は第２図に示すように、排ガスクーラ１６とブース
タポンプ１７との間にサイクロン２３を設けて、冷却後
の排ガス中のダストをサイクロン２３で除去し、ダスト
によるブースタポンプ１７、エジェクタ１８の摩耗、閉
塞などを防止するようにしたものである。他の構成、作
用は実施例１と同様である。Embodiment 2 In this example, as shown in FIG. 2, a cyclone 23 is provided between the exhaust gas cooler 16 and the booster pump 17, and the dust in the cooled exhaust gas is removed by the cyclone 23, and the booster pump 17 due to the dust is removed. , the ejector 18 is prevented from being worn out or blocked. Other configurations and operations are the same as in the first embodiment.
本発明は上記のように、サイクロン石炭燃焼炉からの還
元性の燃焼ガスの一部を冷却した後、昇圧し、これを搬
送媒体として脱硫剤粉末を燃焼炉の比較的均一な高温還
元ゾーンに分散・投入するように構成されているので、
活性を保ったままの脱硫剤粉末と排ガス中の硫黄化合物
とが高温雰囲気で効率よく接触し、このためＣａＳの生
成量が増大し、脱硫性能の向上を図ることができるとい
う効果を有している。As described above, the present invention cools a part of the reducing combustion gas from the cyclone coal combustion furnace, increases the pressure, and uses this as a carrier medium to transfer the desulfurizing agent powder to a relatively uniform high temperature reduction zone of the combustion furnace. Since it is configured to be distributed and input,
The desulfurizing agent powder, which remains active, and the sulfur compounds in the exhaust gas come into contact with each other efficiently in a high-temperature atmosphere, thereby increasing the amount of CaS produced and improving desulfurization performance. There is.
第１図は本発明のサイクロン石炭燃焼炉における脱硫装
置の一実施例を示す説明図、第２図は本発明の装置の他
の実施例を示す説明図、第３図は従来のサイクロン石炭
燃焼炉の一例を示す断面図である。
１・・・火炉（二次炉）、２・・・サイクロン本体、３
・・・石炭投入口、４・・・燃焼用旋回空気供給口、５
・・・ガス導通口、６・・・スラグバッフル、７・・・
スラグ流下口、８・・・サイクロン石炭燃焼炉、１０・
・・スラグタンク、１１・・・燃焼室、１２・・・バイ
パスライン、１３・・・火炎、１４・・・接続ダクト、
１５・・・分岐ダクト、１６・・・排ガスクーラ、１７
・・・ブースタポンプ、１８・・・エジェクタ、２０・
・・高温還元ゾーン、２１・・・脱硫剤粉末ホッパ、２
２・・・ロータリバルブ、２３・・・サイクロンFig. 1 is an explanatory diagram showing one embodiment of the desulfurization device in a cyclone coal combustion furnace of the present invention, Fig. 2 is an explanatory diagram showing another embodiment of the device of the present invention, and Fig. 3 is an explanatory diagram showing a conventional cyclone coal combustion apparatus. It is a sectional view showing an example of a furnace. 1... Furnace (secondary furnace), 2... Cyclone body, 3
... Coal input port, 4... Combustion swirling air supply port, 5
...Gas communication port, 6...Slag baffle, 7...
Slag outlet, 8...Cyclone coal combustion furnace, 10.
...Slag tank, 11...Combustion chamber, 12...Bypass line, 13...Flame, 14...Connection duct,
15... Branch duct, 16... Exhaust gas cooler, 17
... Booster pump, 18... Ejector, 20.
・・High temperature reduction zone, 21 ・・Desulfurizing agent powder hopper, 2
2...Rotary valve, 23...Cyclone
Claims (1)
、このサイクロン本体に石炭投入口、燃焼用旋回空気供
給口、燃焼ガスを二次炉へ導くガス導通口およびスラグ
流下口を設けたサイクロン石炭燃焼炉において、サイク
ロン石炭燃焼炉からの燃焼ガスの一部を抜き出して冷却
した後、昇圧し、昇圧された燃焼ガスを搬送媒体として
脱硫剤粉末をサイクロン石炭燃焼炉のガス導通口近傍の
高温還元ゾーンに分散・投入することを特徴とするサイ
クロン石炭燃焼炉における脱硫方法。 ２ 二次炉の側壁にサイクロン本体を横方向に取り付け
、このサイクロン本体に石炭投入口、燃焼用旋回空気供
給口、燃焼ガスを二次炉へ導くガス導通口およびスラグ
流下口を設けたサイクロン石炭燃焼炉において、サイク
ロン石炭燃焼炉と二次炉との接続ダクトに分岐ダクトを
設け、この分岐ダクトを排ガスクーラ、ブースタポンプ
およびエジェクタを介してサイクロン石炭燃焼炉のガス
導通口近傍の高温還元ゾーンに接続し、エジェクタに脱
硫剤粉末ホッパを接続したことを特徴とするサイクロン
石炭燃焼炉における脱硫装置。[Scope of Claims] 1. A cyclone body is installed horizontally on the side wall of the secondary furnace, and the cyclone body has a coal input port, a swirling air supply port for combustion, a gas communication port for guiding combustion gas to the secondary furnace, and a slag flow downstream. In a cyclone coal combustion furnace equipped with a port, a part of the combustion gas from the cyclone coal combustion furnace is extracted, cooled, and then pressurized, and the desulfurizing agent powder is transferred to the gas of the cyclone coal combustion furnace using the pressurized combustion gas as a carrier medium. A desulfurization method in a cyclone coal combustion furnace characterized by dispersion and injection into a high-temperature reduction zone near the inlet. 2. A cyclone coal system in which a cyclone body is installed horizontally on the side wall of the secondary furnace, and the cyclone body is provided with a coal input port, a swirling air supply port for combustion, a gas communication port for guiding combustion gas to the secondary furnace, and a slag flow port. In the combustion furnace, a branch duct is provided in the connection duct between the cyclone coal combustion furnace and the secondary furnace, and this branch duct is connected to the high temperature reduction zone near the gas inlet of the cyclone coal combustion furnace via the exhaust gas cooler, booster pump and ejector. A desulfurization device in a cyclone coal combustion furnace, characterized in that a desulfurization agent powder hopper is connected to an ejector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63176551A JP2528696B2 (en) | 1988-07-15 | 1988-07-15 | Desulfurization method and apparatus for cyclone coal combustion furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63176551A JP2528696B2 (en) | 1988-07-15 | 1988-07-15 | Desulfurization method and apparatus for cyclone coal combustion furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0225610A true JPH0225610A (en) | 1990-01-29 |
| JP2528696B2 JP2528696B2 (en) | 1996-08-28 |
Family
ID=16015563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63176551A Expired - Lifetime JP2528696B2 (en) | 1988-07-15 | 1988-07-15 | Desulfurization method and apparatus for cyclone coal combustion furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2528696B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649536A (en) * | 1994-02-25 | 1997-07-22 | Colin Corporation | Blood pressure measuring apparatus |
| US6045510A (en) * | 1994-02-25 | 2000-04-04 | Colin Corporation | Blood pressure measuring apparatus |
| WO2009054381A1 (en) | 2007-10-25 | 2009-04-30 | Terumo Kabushiki Kaisha | Blood pressure measuring device and method for controlling the blood pressure measuring device |
-
1988
- 1988-07-15 JP JP63176551A patent/JP2528696B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649536A (en) * | 1994-02-25 | 1997-07-22 | Colin Corporation | Blood pressure measuring apparatus |
| US5836888A (en) * | 1994-02-25 | 1998-11-17 | Colin Corporation | Blood pressure measuring apparatus |
| US6045510A (en) * | 1994-02-25 | 2000-04-04 | Colin Corporation | Blood pressure measuring apparatus |
| US6413224B1 (en) | 1994-02-25 | 2002-07-02 | Colin Corporation | Blood pressure measuring apparatus |
| WO2009054381A1 (en) | 2007-10-25 | 2009-04-30 | Terumo Kabushiki Kaisha | Blood pressure measuring device and method for controlling the blood pressure measuring device |
| US8348851B2 (en) | 2007-10-25 | 2013-01-08 | Terumo Kabushiki Kaisha | Blood pressure measurement device and control method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2528696B2 (en) | 1996-08-28 |
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