JPS645202B2 - - Google Patents
Info
- Publication number
- JPS645202B2 JPS645202B2 JP14384279A JP14384279A JPS645202B2 JP S645202 B2 JPS645202 B2 JP S645202B2 JP 14384279 A JP14384279 A JP 14384279A JP 14384279 A JP14384279 A JP 14384279A JP S645202 B2 JPS645202 B2 JP S645202B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- fluidized
- box
- medium
- 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.)
- Expired
Links
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000001816 cooling Methods 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
- 239000010419 fine particle Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
【発明の詳細な説明】
この発明は流動層ボイラにおける、蒸気温度を
制御する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling steam temperature in a fluidized bed boiler.
近時石油の需給事情よりして石炭を燃料とする
ことの見直しに伴い、流動層で燃焼させる流動層
ボイラが着目されている。しかし石炭は細粒又は
粗流に破砕されて供給されるのでそれ自身の燃焼
完了までに時間のかかること及び流動媒体自身の
比熱が大なることよりして、蒸気温度を急速に変
えようとしてもすぐには層温は変化せず、所謂温
度についての時定数が大な装置であるという問題
がある。 With the recent reconsideration of using coal as a fuel due to oil supply and demand conditions, fluidized bed boilers that burn coal in a fluidized bed are attracting attention. However, since coal is supplied after being crushed into fine particles or coarse particles, it takes time to complete its own combustion, and the specific heat of the fluidizing medium itself is large, so it is difficult to rapidly change the steam temperature. The problem is that the layer temperature does not change immediately, and the device has a large time constant for temperature.
この発明はタービン等最終の蒸気供給先の機器
の要求に応じ流動層ボイラから送出する蒸気の温
度を容易に変える装置を提案することを目的とす
る。 An object of the present invention is to propose a device that easily changes the temperature of steam sent out from a fluidized bed boiler in accordance with the requirements of the equipment to which steam is ultimately supplied, such as a turbine.
本願発明に近似する装置としては、本願出願人
が先に提案した特開昭53−146001号の発明があ
る。しかしこの発明ではレベル計については具体
的に開示されておらず、覗き窓等考えられていた
が流動層の表面が波動変位して確実に知ることが
できなかつた。また流動層炉壁内は800℃以上で
あり他の電気品使用の計器では冷却装置を必要と
し複雑なものとなる。また層の表面レベルの変動
を連続して知るには更に検討した装置手段を必要
とするという問題があつた。 As a device similar to the present invention, there is an invention disclosed in Japanese Patent Application Laid-Open No. 146001/1983, which was previously proposed by the applicant of the present application. However, this invention does not specifically disclose a level meter, and although a viewing window was considered, the surface of the fluidized bed was subject to wave displacement, making it impossible to know with certainty. Furthermore, the temperature inside the fluidized bed reactor wall is over 800°C, and instruments that use other electrical components require a cooling system, making it complicated. Furthermore, there was a problem in that a more sophisticated device was required to continuously determine the changes in the surface level of the layer.
要するにこの発明は流動層ボイラの流動層内に
伝熱管を位置させ、流動媒体の抜きとりまたは供
給をすることにより層高を変え、層内に浸漬する
伝熱管面積の変化により熱伝達量を変えて蒸気の
温度を調節する流動層ボイラの蒸気温度制御装置
であることを特徴とする。 In short, this invention positions heat transfer tubes in the fluidized bed of a fluidized bed boiler, changes the bed height by removing or supplying the fluidized medium, and changes the amount of heat transfer by changing the area of the heat transfer tubes immersed in the bed. The present invention is characterized in that it is a steam temperature control device for a fluidized bed boiler that adjusts the temperature of steam.
この発明の一実施例を以下図面により説明す
る。流動層ボイラ１は底部に空気室２と多孔板３
をもち、この多孔板上に媒体を収容し、多孔板か
ら供給される燃焼用空気で流動層４を形成してい
る。タービンその他の機器に供給する蒸気はドラ
ム５からの蒸気を過熱する過熱器６を流動層４内
に位置させ管路６ａにより送出する。この発明に
おいては伝熱管、特に過熱器管６を層高H1，H2
の影響を受けやすい層表面に近い層上部に位置さ
せ、蒸発管群７は流動層の底部側に位置させる。
符号７ａ，７ｂは排ガス流中に設けた蒸発管群で
ありその後流に節炭器８を位置させる。排ガスは
管路９により図示しない脱硫、脱硝の装置と集塵
機を経由し煙突より排出される。粉細粒炭と石灰
石の粉細粒の混合した燃料はバーナ１０から流動
層中に供給される。流動媒体は管路１１から供給
される燃焼用空気で流動化されているので伝熱管
群たる過熱器管６、蒸発管群７との接触により熱
伝達は効果的に行なわれる。 An embodiment of this invention will be described below with reference to the drawings. The fluidized bed boiler 1 has an air chamber 2 and a perforated plate 3 at the bottom.
A medium is accommodated on this perforated plate, and a fluidized bed 4 is formed with combustion air supplied from the perforated plate. A superheater 6 for superheating the steam from the drum 5 is located within the fluidized bed 4, and the steam to be supplied to the turbine and other equipment is sent out through a pipe 6a. In this invention, the heat exchanger tubes, especially the superheater tube 6, have layer heights H 1 and H 2 .
The evaporator tube group 7 is located at the bottom side of the fluidized bed, and the evaporation tube group 7 is located at the bottom side of the fluidized bed.
Reference numerals 7a and 7b represent a group of evaporation tubes provided in the exhaust gas flow, and a fuel economizer 8 is located downstream thereof. The exhaust gas passes through a desulfurization and denitrification device (not shown) and a dust collector through a pipe 9 and is discharged from a chimney. A fuel mixture of fine granulated coal and fine limestone powder is supplied from a burner 10 into the fluidized bed. Since the fluidized medium is fluidized by the combustion air supplied from the pipe line 11, heat transfer is effectively carried out through contact with the superheater tube 6 and the evaporator tube group 7, which are the heat transfer tube group.
さきに述べたように流動媒体の比熱は大なもの
でありこの流動層４は温度についての時定数は大
きいものとなつており、通常のボイラにおけるご
とく、単に燃料の供給量の変更のみでは負荷変動
に対応することができない。発明者等はさきに層
高変化を容易にする装置として第２図に示す層高
調節装置を提案した、流動層炉壁１ｂに接続して
調節室１２を設け、その内部に滑動変位して層高
を調節する箱１４を位置させる。前記の流動層炉
壁１ｂには開口１ａが設けてあるので、箱の上縁
１４ａにより流動層の層高Ｈは規定されることと
なる、溢流した流動媒体は箱１４の底部開口１５
からノズル１３、弁１６を経由して流動媒体貯溜
槽１７に排出される。層高Ｈの変更は箱１４の底
部に固定した箱変位量を表示できるねじ棒１８と
歯車１９との関連で箱１４が上下変位して行なわ
れる、歯車１９はギヤードモータ等の駆動装置２
０により駆動される。このねじ棒１８の流動層ボ
イラの下面からの展出長さを計測することにより
第２図に示すごとく流動層の層高Ｈを知ることが
できる。 As mentioned earlier, the specific heat of the fluidized medium is large, and the time constant of the temperature of this fluidized bed 4 is large.As in a normal boiler, simply changing the amount of fuel supplied will not reduce the load. Unable to respond to fluctuations. The inventors previously proposed a bed height adjustment device shown in FIG. 2 as a device for facilitating bed height changes. A box 14 for adjusting the layer height is positioned. Since the fluidized bed furnace wall 1b is provided with the opening 1a, the bed height H of the fluidized bed is defined by the upper edge 14a of the box.The overflowing fluidized medium flows through the bottom opening 15 of the box 14.
The fluid is discharged from the fluid via the nozzle 13 and the valve 16 into the fluid storage tank 17 . The layer height H is changed by vertically displacing the box 14 in relation to a gear 19 and a threaded rod 18 fixed to the bottom of the box 14 that can display the amount of box displacement.The gear 19 is driven by a drive device 2 such as a geared motor.
Driven by 0. By measuring the length of the threaded rod 18 extending from the bottom surface of the fluidized bed boiler, the bed height H of the fluidized bed can be determined as shown in FIG.
流動媒体貯溜槽１７は耐熱材料で形成され底部
に多孔板１７ａとガス供給室１７ｂをもち受入れ
た媒体を流動化して保持することができる。流動
化用のガスは排ガス管路９より分岐する管路２１
で排ガスを吸引し昇圧ブロワ２２減圧弁２３、ダ
ンパ２４を経由して供給される。蒸気温度をあげ
るときは管路２５、弁２６を経由する圧力排ガス
を使用して気流リフト装置２７により媒体を流動
層４に戻し入れ、かつ供給燃料量を増加する。こ
の場合媒体は少くとも排ガス温度には加熱されて
いるので、その昇温もすみやかにできる。制御箱
２９には蒸気温度発信器２８からの信号がおくら
れ、制御箱２９からの指令信号により駆動装置２
０、弁１６、弁２６が制御される。 The fluidized medium storage tank 17 is made of a heat-resistant material, has a perforated plate 17a and a gas supply chamber 17b at the bottom, and can fluidize and hold the received medium. The gas for fluidization is passed through a pipe line 21 branching from the exhaust gas pipe line 9.
Exhaust gas is sucked in and supplied via a boosting blower 22, a pressure reducing valve 23, and a damper 24. When increasing the steam temperature, the pressurized exhaust gas passing through the pipe 25 and the valve 26 is used to return the medium to the fluidized bed 4 by the air lift device 27, and the amount of fuel to be supplied is increased. In this case, since the medium has been heated to at least the exhaust gas temperature, its temperature can be raised quickly. A signal from the steam temperature transmitter 28 is sent to the control box 29, and the drive device 2 is controlled by the command signal from the control box 29.
0, valve 16, and valve 26 are controlled.
この発明を実施することにより温度の高い流動
媒体の抜き取りと供給が容易にされ、ねじ棒１８
の展出長さの計測により装置外から層高が確実に
調節されて蒸気温度を容易に制御でき、また流動
媒体貯溜槽内の媒体は流動層ボイラの排ガスで保
温されかつ常時流動化されており、急速負荷増の
とき、または再起動のとき必要とする起動時間の
短縮ができ、かつプラントとしての熱効率が向上
できるという効果を奏するものである。 By carrying out this invention, the withdrawal and supply of the fluid medium at high temperature is facilitated, and the threaded rod 18
The bed height can be reliably adjusted from outside the equipment by measuring the extension length of the steam, and the steam temperature can be easily controlled.In addition, the medium in the fluidized medium storage tank is kept warm by the exhaust gas of the fluidized bed boiler and is constantly fluidized. This has the effect of shortening the startup time required when there is a rapid load increase or restarting, and improving the thermal efficiency of the plant.
第１図はこの発明の実施にかかる装置の構造と
配管を示す図面、第２図は層高調節装置の一例を
示す縦断面図である。
１……流動層ボイラ、６……過熱器管、Ｈ，
H1，H2……層高、１４……箱、１７……流動媒
体貯溜槽、２２……昇圧ブロワ、２７……気流リ
フト装置。
FIG. 1 is a drawing showing the structure and piping of an apparatus according to the present invention, and FIG. 2 is a longitudinal cross-sectional view showing an example of a bed height adjusting apparatus. 1...Fluidized bed boiler, 6...Superheater tube, H,
H 1 , H 2 ... Bed height, 14 ... Box, 17 ... Fluid medium storage tank, 22 ... Pressure booster blower, 27 ... Air flow lift device.
Claims (1)
し、流動層からの媒体の抜き取りまたは流動層へ
媒体の供給をすることにより流動層の層高を変え
て層内伝熱管からの蒸気温度を変える装置におい
て、前記流動媒体貯溜槽に設けたガス供給室と気
流リフト装置に流動層ボイラの排ガスを加圧して
供給する管路と、流動層炉壁に接続して設けた調
整室内に位置しかつ上下変位可能にして層高の調
節をする底部開口付きの箱と、その箱変位量の表
示手段付きの駆動装置と、過熱蒸気温度の信号を
受け前記箱を上下変位させる制御箱とを設けたこ
とを特徴とする流動層ボイラの蒸気温度制御装
置。1 Connecting a fluidized bed boiler and a fluidized medium storage tank through a pipe line, and changing the bed height of the fluidized bed by removing the medium from the fluidized bed or supplying the medium to the fluidized bed, and controlling the temperature of the steam from the intrabed heat exchanger tubes. In the apparatus for changing the fluidized bed, a gas supply chamber provided in the fluidized medium storage tank, a pipe line for supplying pressurized exhaust gas of the fluidized bed boiler to the air flow lift device, and an adjustment chamber provided in connection with the fluidized bed furnace wall are located. A box with an opening at the bottom that can be moved up and down to adjust the layer height, a drive device with display means for the amount of displacement of the box, and a control box that moves the box up and down in response to a signal of superheated steam temperature. A steam temperature control device for a fluidized bed boiler, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14384279A JPS5668701A (en) | 1979-11-08 | 1979-11-08 | Steam temperature control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14384279A JPS5668701A (en) | 1979-11-08 | 1979-11-08 | Steam temperature control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5668701A JPS5668701A (en) | 1981-06-09 |
| JPS645202B2 true JPS645202B2 (en) | 1989-01-30 |
Family
ID=15348209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14384279A Granted JPS5668701A (en) | 1979-11-08 | 1979-11-08 | Steam temperature control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5668701A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591901A (en) * | 1982-06-19 | 1984-01-07 | 川重冷熱工業株式会社 | Method of controlling low-load temperature of fluidized bed |
| JPS5976801U (en) * | 1982-11-15 | 1984-05-24 | 三菱重工業株式会社 | Powder contact boiler |
| JPS61159001A (en) * | 1984-12-29 | 1986-07-18 | 川崎重工業株式会社 | Fluidized bed boiler and operating method thereof |
| JPS6217501A (en) * | 1985-07-15 | 1987-01-26 | 宇部興産株式会社 | Layer-height regulator in fluidized bed boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146001A (en) * | 1977-05-26 | 1978-12-19 | Babcock Hitachi Kk | Running method of a fluidized boiler and apparatus therefor |
-
1979
- 1979-11-08 JP JP14384279A patent/JPS5668701A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5668701A (en) | 1981-06-09 |
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