JPH0626601A - Pressurized fluidized bed boiler - Google Patents
Pressurized fluidized bed boilerInfo
- Publication number
- JPH0626601A JPH0626601A JP18394492A JP18394492A JPH0626601A JP H0626601 A JPH0626601 A JP H0626601A JP 18394492 A JP18394492 A JP 18394492A JP 18394492 A JP18394492 A JP 18394492A JP H0626601 A JPH0626601 A JP H0626601A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- main body
- heat transfer
- fluidized bed
- temperature
- 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
- 239000011810 insulating material Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000011449 brick Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧力容器に収容されて
いるボイラ本体内で燃料をベッド材と共に流動化させな
がら燃焼させる加圧流動床ボイラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized fluidized bed boiler that combusts fuel while fluidizing it with a bed material in a boiler body housed in a pressure vessel.
【０００２】[0002]
【従来の技術】近年、流動床ボイラとしては、燃料を高
い燃焼効率で燃焼でき、かつコンパクト化、高脱硫率及
びプラント熱効率の向上等を図れる加圧流動床ボイラが
研究開発されつつある。2. Description of the Related Art In recent years, as a fluidized bed boiler, a pressurized fluidized bed boiler is being researched and developed which can burn fuel with high combustion efficiency and can be made compact, have a high desulfurization rate, and can improve plant thermal efficiency.
【０００３】この加圧流動床ボイラは、図５に示すよう
に、ボイラ本体１０が収容されている圧力容器１１に高
圧の燃焼空気を供給し、その圧力容器１１内の燃焼空気
がボイラ本体１０内に導かれて、本体１０内で燃料（例
えば粉状の石炭）が灰や石灰石等からなるベッド材と共
に流動化しながら燃焼するものであり、その燃焼熱の一
部が伝熱管１２により蒸気として回収され、これが蒸気
タービン１３に供給される。また、ボイラ本体１０から
の燃焼排ガスは、集塵器１４を介して集塵された後、ガ
スタービン１５に供給され、発電が行われるようになっ
ている。ガスタービン１５からの排ガスは、脱硝装置１
６、冷却器１７等を介した後、煙突１８から大気に開放
される。In this pressurized fluidized bed boiler, as shown in FIG. 5, high-pressure combustion air is supplied to a pressure vessel 11 in which the boiler body 10 is housed, and the combustion air in the pressure vessel 11 is supplied to the boiler body 10. The fuel (for example, powdery coal) is guided into the main body 10 and burns while fluidizing with the bed material made of ash, limestone or the like, and a part of the combustion heat is converted to steam by the heat transfer tube 12. It is collected and supplied to the steam turbine 13. Further, the combustion exhaust gas from the boiler body 10 is collected through the dust collector 14 and then supplied to the gas turbine 15 for power generation. The exhaust gas from the gas turbine 15 is the denitration device 1
6. After passing through the cooler 17, etc., the chimney 18 is opened to the atmosphere.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述の加圧
流動床ボイラのボイラ本体は、常圧のボイラとほぼ同様
に水管壁で矩形状に形成され、この外側にバックステイ
等の補強材が配設されている。そのボイラ本体には、圧
力容器内が例えば10〜12kg／cm2 の圧力に、ボイラ本体
内が例えば 9〜11kg／cm2 になるために約１kg／cm2 の
外圧がかかるので、常圧のボイラの場合に比してさらに
強度をあげなければならず、補強材の強化や補強材のピ
ッチを狭くする等の特別の対策が必要になる。By the way, the boiler body of the above-mentioned pressurized fluidized bed boiler is formed in a rectangular shape with a water pipe wall almost like a normal pressure boiler, and a reinforcing material such as a back stay is provided outside this. Is provided. Its boiler, the pressure in the pressure vessel for example 10~12kg / cm 2, since about 1 kg / cm 2 external pressure is applied to the boiler body is for example 9~11kg / cm 2, the atmospheric pressure The strength must be further increased compared to the case of a boiler, and special measures such as strengthening the reinforcing material and narrowing the pitch of the reinforcing material are required.
【０００５】そこで、本発明は、このような事情を考慮
してなされたもので、その目的は、ボイラ本体の強度の
向上を図れる加圧流動床ボイラを提供することにある。Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to provide a pressurized fluidized bed boiler capable of improving the strength of the boiler body.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記の目的を
達成するために、圧力容器に収容されているボイラ本体
内で燃料を流動化させながら燃焼させ、この燃焼熱の一
部を伝熱管で回収する加圧流動床ボイラにおいて、上記
ボイラ本体として内面に断熱材が内張された円筒体を用
いると共に、このボイラ本体内に上記伝熱管をコイル状
に配設したものである。In order to achieve the above object, the present invention burns fuel while fluidizing it in a boiler body housed in a pressure vessel, and transfers a part of this combustion heat. In a pressurized fluidized bed boiler recovered by a heat tube, a cylindrical body having an inner surface lined with a heat insulating material is used as the boiler body, and the heat transfer tube is arranged in a coil in the boiler body.
【０００７】[0007]
【作用】ボイラ本体は水管壁で形成されてその冷却及び
伝熱面として作用されていたが、加圧流動床ボイラでは
ボイラ本体を水管壁で形成した場合、本体を冷却するだ
けで伝熱面としては考えていないことに鑑み、本発明者
は本発明を完成するに至ったのである。ボイラ本体とし
て円筒体を用いてその内面に断熱材を内張することによ
り本体内が高温になっても円筒体の温度上昇が抑制され
る。このため、ボイラ本体として円筒体を用いることが
可能となり、ボイラ本体の強度が向上することになる。[Operation] Although the boiler body was formed by the water pipe wall and acted as its cooling and heat transfer surface, in the case of the pressurized fluidized bed boiler, when the boiler body was formed by the water pipe wall, the body was simply cooled. In view of not considering it as a heat aspect, the present inventor has completed the present invention. By using a cylindrical body as the boiler main body and lining a heat insulating material on the inner surface thereof, the temperature rise of the cylindrical body is suppressed even if the temperature inside the main body rises. Therefore, it is possible to use a cylindrical body as the boiler body, and the strength of the boiler body is improved.
【０００８】また、ボイラ本体内の伝熱管はコイル状に
形成されているため、伝熱管の長さや配置の自由度が増
える。Further, since the heat transfer tube in the boiler body is formed in a coil shape, the degree of freedom in the length and arrangement of the heat transfer tube increases.
【０００９】[0009]
【実施例】以下、本発明の実施例を添付図面に基づいて
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１０】図１〜図４において、１は圧力容器（図示
せず）内に収容されるボイラ本体を示す。1 to 4, reference numeral 1 denotes a boiler body housed in a pressure vessel (not shown).
【００１１】ボイラ本体１は直立の円筒状に形成され、
具体的には図３に示すようにボイラ用圧延鋼材（ＳＢ）
等からなる円筒体２の内面に耐火レンガ等の断熱材３が
内張されて形成されている。The boiler body 1 is formed in an upright cylindrical shape,
Specifically, as shown in Fig. 3, rolled steel material for boiler (SB)
A heat insulating material 3 such as a refractory brick is lined on the inner surface of a cylindrical body 2 made of, for example.
【００１２】このボイラ本体１内の下方には図１に示す
ように空気散気管４が設けられ、この空気散気管４上に
燃料（例えば粒径が10mm程度の粉状の石炭）及び石灰石
等からなるベッド材が供給され、それら燃料及びベッド
材が空気管４からの燃焼空気により流動化されて流動層
が形成されると共に高温高圧下で燃料が燃焼するように
構成されている。As shown in FIG. 1, an air diffuser 4 is provided in the lower part of the boiler body 1, and fuel (for example, powdery coal having a particle size of about 10 mm) and limestone are provided on the air diffuser 4. Is supplied, and the fuel and the bed material are fluidized by the combustion air from the air pipe 4 to form a fluidized bed, and the fuel is burned under high temperature and high pressure.
【００１３】ボイラ本体１内の流動層が形成される上方
には、支持管管寄せ５が配設され、この管寄せ５には、
流動層内等に配設される多数の伝熱管６を支持する支持
管７が複数接続されており、それら支持管７及び支持管
管寄せ５内には冷却水が流れるようになっている。A support pipe header 5 is disposed above the fluidized bed formed in the boiler body 1, and the pipe header 5 includes:
A plurality of support pipes 7 that support a large number of heat transfer pipes 6 arranged in a fluidized bed or the like are connected, and cooling water flows in the support pipes 7 and the support pipe header 5.
【００１４】流動層内等に配設されている多数の伝熱管
６は、蒸発管，過熱器管，再熱器管，節炭器管などの数
種の熱交換器を構成する伝熱管であり、流動層内の燃焼
熱の一部を収熱するもので、図４に示すように円筒形の
コイル状に形成されている。尚、伝熱管はコイル状であ
ればどのように形成してもよく、例えば、１ループを同
一平面で形成するようにしてもよい。A large number of heat transfer tubes 6 arranged in the fluidized bed or the like are heat transfer tubes constituting several kinds of heat exchangers such as an evaporation tube, a superheater tube, a reheater tube and a economizer tube. There is a part of the combustion heat in the fluidized bed, and it is formed in a cylindrical coil shape as shown in FIG. The heat transfer tube may be formed in any shape as long as it has a coil shape. For example, one loop may be formed on the same plane.
【００１５】また、伝熱管６は、熱交換器の種類によっ
てボイラ本体１外でそれぞれの入口管寄せ８及び出口管
寄せ９に接続されている。図１及び図２に示す例では２
種の熱交換器の入口管寄せ８ａ，８ｂ及び出口管寄せ９
ａ，９ｂが示され、第１入口管寄せ８ａに接続されたボ
イラ本体１内壁近くの４つの伝熱管６は同じ第１出口管
寄せ９ａに接続されると共に、第２入口管寄せ８ｂに接
続された本体中央付近の４つの伝熱管は第２出口管寄せ
９ｂに接続される。The heat transfer pipes 6 are connected to the respective inlet pipe headers 8 and outlet pipe headers 9 outside the boiler body 1 depending on the type of heat exchanger. 2 in the example shown in FIGS. 1 and 2.
Inlet header 8a, 8b and outlet header 9
a and 9b are shown, and the four heat transfer tubes 6 near the inner wall of the boiler body 1 connected to the first inlet header 8a are connected to the same first outlet header 9a and the second inlet header 8b. The four heat transfer tubes near the center of the main body are connected to the second outlet header 9b.
【００１６】次に本実施例の作用を説明する。Next, the operation of this embodiment will be described.
【００１７】ボイラ本体１内には圧力容器内の空気が空
気散気管４から流入し、この空気により燃料例えば石炭
とベッド材とが流動化されて流動層が形成されると共
に、石炭が高温（例えば約 890℃）高圧（例えば約 9〜
11kg／cm2 ）下で燃焼する。その流動層内の燃焼熱の一
部が伝熱管６に収熱され、これにより発生した蒸気が蒸
気タービン等に供給される。The air in the pressure vessel flows into the boiler body 1 from the air diffuser 4, and the air fluidizes the fuel such as coal and the bed material to form a fluidized bed, and the coal has a high temperature ( For example, about 890 ℃) High pressure (for example, about 9 to
It burns under 11 kg / cm 2 ). Part of the combustion heat in the fluidized bed is collected in the heat transfer tube 6, and the steam generated thereby is supplied to the steam turbine or the like.
【００１８】そのボイラ本体１には圧力容器内と本体１
内の差圧により外圧が作用するが、本体１が円筒状に形
成されているため、矩形状に形成されている場合に比し
て強度が向上する。また、ボイラ本体１内が高温（例え
ば約 890℃）になっても円筒体２の内面に耐火レンガ等
の断熱材３が内張されているため、円筒体２の温度上昇
が抑制されその温度が 350℃以上になることがない。こ
のため、円筒体２が例えばボイラ用圧延鋼材（ＳＢ）で
形成されているために、ＳＢが 350℃以下では耐久性が
よいので、ボイラ本体１の強度が向上することになり、
従来必要であったバックステイ等の補強材が不要にな
る。尚、当該材質は炭素鋼の他Ｃｒ−Ｍｏ鋼等でもよ
い。The boiler body 1 includes a pressure vessel and a body 1.
Although the external pressure acts due to the internal pressure difference, since the main body 1 is formed in a cylindrical shape, the strength is improved as compared with the case where it is formed in a rectangular shape. Further, even if the temperature inside the boiler body 1 becomes high (for example, about 890 ° C.), since the heat insulating material 3 such as refractory brick is lined on the inner surface of the cylindrical body 2, the temperature rise of the cylindrical body 2 is suppressed and the temperature thereof is suppressed. Does not exceed 350 ° C. Therefore, since the cylindrical body 2 is formed of, for example, a rolled steel material for a boiler (SB), the durability is good when the SB is 350 ° C. or lower, so that the strength of the boiler body 1 is improved.
The reinforcing material such as the back stay, which was necessary in the past, becomes unnecessary. The material may be carbon steel, Cr-Mo steel, or the like.
【００１９】また、ボイラ本体１内の伝熱管６はコイル
状に形成されているため、伝熱管６の長さや配置の自由
度が増える。すなわち、伝熱管６がコイル状に形成され
ているため、伝熱管６の長さが変わってもその形状は変
わらず、管寄せ８，９に接続される位置が変わるだけな
ので、縦方向に伝熱管６が配設される場合に比して伝熱
管６の長さを容易に任意に設定することが可能となる。
また伝熱管６がコイル状に形成されているため、順序よ
く伝熱管６を整列させることが可能となり、コンパクト
化を図れる。Further, since the heat transfer tube 6 in the boiler body 1 is formed in a coil shape, the degree of freedom in the length and arrangement of the heat transfer tube 6 increases. That is, since the heat transfer tube 6 is formed in a coil shape, its shape does not change even if the length of the heat transfer tube 6 changes, and only the position connected to the headers 8 and 9 changes. The length of the heat transfer tube 6 can be easily set arbitrarily as compared with the case where the heat tube 6 is provided.
Further, since the heat transfer tubes 6 are formed in a coil shape, the heat transfer tubes 6 can be arranged in order, and the size can be reduced.
【００２０】[0020]
【発明の効果】以上要するに本発明によれば、内面に断
熱材が内張された円筒体のボイラ本体を用いると共にこ
の本体内に伝熱管をコイル状に配設したので、ボイラ本
体の強度が向上し、しかも伝熱管の自由度が増えるとい
う優れた効果を発揮する。In summary, according to the present invention, the strength of the boiler main body is improved because the cylindrical main body of the thermal insulation material is used and the heat transfer tubes are arranged in a coil shape in the main body. It has the excellent effect of improving the heat transfer tube flexibility.
【図１】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】図１中のＡ−Ａ線矢視図である。FIG. 2 is a view taken along the line AA in FIG.
【図３】図１中のＢ−Ｂ線矢視図である。FIG. 3 is a view taken along line BB in FIG.
【図４】本発明のボイラ本体内に伝熱管を配設した一例
を示す斜視図である。FIG. 4 is a perspective view showing an example in which a heat transfer tube is arranged in the boiler body of the present invention.
【図５】加圧流動床ボイラのプラントの一例を示す構成
図である。FIG. 5 is a configuration diagram showing an example of a plant of a pressurized fluidized bed boiler.
１ ボイラ本体 ２ 円筒体 ３ 断熱材 ６ 伝熱管 1 Boiler main body 2 Cylindrical body 3 Heat insulating material 6 Heat transfer tube
Claims (1)
で燃料を流動化させながら燃焼させ、この燃焼熱の一部
を伝熱管で回収する加圧流動床ボイラにおいて、上記ボ
イラ本体として内面に断熱材が内張された円筒体を用い
ると共に、このボイラ本体内に上記伝熱管をコイル状に
配設したことを特徴とする加圧流動床ボイラ。1. A pressurized fluidized bed boiler in which a fuel is combusted in a boiler body housed in a pressure vessel while being fluidized, and a part of the combustion heat is recovered by a heat transfer tube. A pressurized fluidized bed boiler, which uses a cylindrical body having a heat insulating material lined therein and in which the heat transfer tube is arranged in a coil shape in the boiler body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18394492A JP3185379B2 (en) | 1992-07-10 | 1992-07-10 | Pressurized fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18394492A JP3185379B2 (en) | 1992-07-10 | 1992-07-10 | Pressurized fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0626601A true JPH0626601A (en) | 1994-02-04 |
| JP3185379B2 JP3185379B2 (en) | 2001-07-09 |
Family
ID=16144546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18394492A Expired - Fee Related JP3185379B2 (en) | 1992-07-10 | 1992-07-10 | Pressurized fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3185379B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990005367A1 (en) * | 1988-11-08 | 1990-05-17 | Tdk Corporation | Magnetic powder, its production method, magnetic recording medium and magnetic recording method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200816596A (en) | 2006-10-17 | 2008-04-01 | Samya Technology Co Ltd | Solar charger capable of extending and adjusting angle |
-
1992
- 1992-07-10 JP JP18394492A patent/JP3185379B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990005367A1 (en) * | 1988-11-08 | 1990-05-17 | Tdk Corporation | Magnetic powder, its production method, magnetic recording medium and magnetic recording method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3185379B2 (en) | 2001-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |