JPH01277102A - Control of boiler - Google Patents
Control of boilerInfo
- Publication number
- JPH01277102A JPH01277102A JP10728288A JP10728288A JPH01277102A JP H01277102 A JPH01277102 A JP H01277102A JP 10728288 A JP10728288 A JP 10728288A JP 10728288 A JP10728288 A JP 10728288A JP H01277102 A JPH01277102 A JP H01277102A
- Authority
- JP
- Japan
- Prior art keywords
- boiler
- coal
- parameter correction
- predicted
- control
- 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
- 238000012937 correction Methods 0.000 claims abstract description 22
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 29
- 238000002485 combustion reaction Methods 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000004364 calculation method Methods 0.000 description 17
- 238000011084 recovery Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035936 sexual power Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、石炭や重油等を燃焼するボイラにおける燃料
の特性変化を的確に考慮する制御方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method that accurately takes into account changes in the characteristics of fuel in a boiler that burns coal, heavy oil, or the like.
［従来の技術］
従来のボイラ制御は、第２図に示すようにＭＷＤ （発
電機の出力指令）ｌをインデックスとしてボイラ制御装
置２の制御パラメータを決定してボイラ３の制御を行な
っている。[Prior Art] In conventional boiler control, as shown in FIG. 2, the boiler 3 is controlled by determining the control parameters of the boiler control device 2 using MWD (generator output command) l as an index.
一方、例えば石炭焚ボイラにおいて、供給する炭種が変
化するとボイラの特性が変化するので、炭種か変った場
合には、その都度燃焼炭特性を把握するための試験を実
施し、ボイラ制御装置２の制御パラメータの調整を行う
ようにしている。On the other hand, for example, in a coal-fired boiler, if the type of coal supplied changes, the characteristics of the boiler will change, so when the type of coal changes, tests are conducted to understand the characteristics of the combustion coal each time, and the boiler control system The second control parameter is adjusted.
［発明が解決しようとする課題］
しかし、石炭焚ボイラへ供給する石炭は、同一産地の石
炭でも性状が変化し、又同一種の石炭でも雨水の影響な
どによって経時的に大きくその燃焼特性に差異を生じる
。[Problem to be solved by the invention] However, the properties of the coal supplied to a coal-fired boiler change even if the coal is from the same production area, and even the same type of coal can have significant differences in its combustion characteristics over time due to the influence of rainwater, etc. occurs.
このため、前記従来のように、炭種が変化したときのみ
燃焼炭の試験を実施し、ボイラ制御装置２の制御パラメ
ータの修正を行う方式では、前記したように同一炭種で
の性状変化や経時的な性状変化等が生じた場合に、それ
に対応することができなく、よって適切な制御パラメー
タの調整が行われず、制御が不安定となって制御性の悪
化を来す問題を生じていた。For this reason, in the conventional method of testing combustion coal and correcting the control parameters of the boiler control device 2 only when the coal type changes, as described above, the change in properties of the same coal type When changes in properties occur over time, it is not possible to respond to such changes, and as a result, appropriate control parameters are not adjusted, resulting in unstable control and poor controllability. .
本発明は、燃料の性状変化に伴なうボイラ特性の変化を
ボイラ状態量と燃料性状値からの予測特性とで比較推定
し１、それに基づいて演算した制御パラメータ修正信号
により、ボイラ制御回路の制御パラメータを自動的に最
適状態に調整することを目的としている。The present invention compares and estimates changes in boiler characteristics due to changes in fuel properties using boiler state quantities and predicted characteristics from fuel property values1, and uses control parameter correction signals calculated based on the results to control the boiler control circuit. The purpose is to automatically adjust control parameters to the optimal state.
［課題を解決するための手段］
本発明は、上記技術的課題を解決しようとしたもので、
ボイラ制御装置に入力されているボイラ各部の圧力、温
度から求めたボイラ各部の収態信号、及びボイラ各部の
検出信号から演算して得たボイラ状態量と燃料性状値を
用いた予測ボイラ特性とを比較して、ボイラ状態の変化
を推定し、その推定結果をもとにパラメータ修正信号を
演算して該パラメータ修正信号によりボイラ制御装置の
制御パラメータを修正することを特徴とするボイラ制御
方法、に係るものである。[Means for Solving the Problems] The present invention attempts to solve the above technical problems, and
Predicted boiler characteristics using the boiler state quantities and fuel property values calculated from the boiler convergence signals obtained from the pressure and temperature of each part of the boiler that are input to the boiler control device, and the detection signals of each part of the boiler. A boiler control method, comprising: estimating a change in the boiler state by comparing the above, calculating a parameter correction signal based on the estimation result, and correcting a control parameter of the boiler control device using the parameter correction signal; This is related to.
［作 用］
従って、本発明では、燃料の性状に基づいて予測した予
測燃焼炭特性と、実測された情報に基づいて常時演算を
行って求めたボイラ状態量とを比較して、ボイラ状態の
変化を予測し、その予測結果に基づいて求めたパラメー
タ修正信号により制御パラメータを自動的に修正する。[Function] Therefore, in the present invention, the predicted combustion coal characteristics predicted based on the properties of the fuel are compared with the boiler state quantities obtained by constant calculation based on the actually measured information, and the boiler state is determined. Changes are predicted, and control parameters are automatically corrected using parameter correction signals obtained based on the prediction results.
［実 施 例］ 以下本発明の実施例を図面を参照しつつ説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の方法を実施する石炭焚ボイラの制御装
置の一例を示すもので、図中第２図と同一の符号を付し
たものは同一物を表わしている。FIG. 1 shows an example of a control device for a coal-fired boiler that implements the method of the present invention, and the same reference numerals as in FIG. 2 represent the same components.
図示するように、あらかじめ分析された石炭の性状分析
値５を用い予測演算回路６で演算して求めた予測燃焼炭
特性７ （予測ボイラ特性）を制御パラメータ修正演算
回路８に入力する。As shown in the figure, predicted combustion coal characteristics 7 (predicted boiler characteristics) calculated by a prediction calculation circuit 6 using coal property analysis values 5 analyzed in advance are input to a control parameter correction calculation circuit 8.
一方、ボイラ制御装置２には、制御のための種々の情報
が入力されているので、この情報のうち、ボイラ３の状
態量を把握する上で重要な、エコノマイザ−人口の給水
温度及び圧力、火炉パス出口の温度及び圧力、主蒸気温
度及び圧力等の情報を入力してボイラ各部の収態計算を
行うボイラ各部収態演算回路９を設け、該回路９によっ
て求めたボイラ各部収態信号１０をボイラ状態量演算回
路１１に導入する。On the other hand, various information for control is input to the boiler control device 2, so among this information, the economizer population water supply temperature and pressure, which are important for understanding the state quantities of the boiler 3, There is provided a boiler parts recovery calculation circuit 9 which inputs information such as temperature and pressure at the furnace pass outlet, main steam temperature and pressure, and calculates the recovery of each part of the boiler, and boiler parts recovery signals 10 obtained by the circuit 9 are provided. is introduced into the boiler state quantity calculation circuit 11.
又、前記ボイラ制御装置２に入力されている情報のうち
、ボイラ状態量の把握に必要な燃料量、ＮＯＸ値等の検
出信号１２を前記ボイラ状態量演算回路１１に入力する
。Further, among the information inputted to the boiler control device 2, a detection signal 12 such as fuel amount and NOX value necessary for grasping the boiler state quantity is inputted to the boiler state quantity calculation circuit 11.
ボイラ状態量演算回路１１では、前記ボイラ各部収態信
号ＩＯ及び検出ｆｔ号１２からボイラ状態量を演算し、
その信号１３を前記制御パラメータ修正演算回路８に入
力する。The boiler state quantity calculation circuit 11 calculates the boiler state quantity from the boiler each part convergence signal IO and the detected ft number 12,
The signal 13 is input to the control parameter correction calculation circuit 8.
制御パラメータ修正演算回路８では、前記予測燃焼炭特
性７と実測に基づくボイラ状態の変化を推定し、該推定
結果をもとにパラメータ修正信号１４を演算してボイラ
制御装置２で制御パラメータの修正を行うようにしてい
る。The control parameter correction calculation circuit 8 estimates changes in the boiler state based on the predicted combustion coal characteristics 7 and actual measurements, calculates a parameter correction signal 14 based on the estimation result, and corrects the control parameters in the boiler control device 2. I try to do this.
石炭焚ボイラ３に供給される石炭の種類が変化すると、
その石炭の性状分析値５を演算回路６に入力することに
より予測燃焼炭特性７を演算して制御パラメータ修正演
算回路８に入力し、該回路８により前記炭種に応じたパ
ラメータ修正信号１４を演算してボイラ制御装置２に入
力することにより、制御パラメータの修正を行う。When the type of coal supplied to the coal-fired boiler 3 changes,
The predicted combustion coal characteristics 7 are calculated by inputting the property analysis value 5 of the coal to the calculation circuit 6, and inputted to the control parameter correction calculation circuit 8. The circuit 8 outputs the parameter correction signal 14 according to the coal type. The control parameters are corrected by calculating and inputting them to the boiler control device 2.
一方、ボイラ状態量が、ボイラ各部収態演算回路９から
のボイラ各部収態信号１０及び検出信号１２が入力され
ているボイラ状態量演算回路１１によって常時把握され
ており、このように経時的に変化するボイラ状態量信号
１３と前記予測燃焼炭特性７とが制御パラメータ修正演
算回路８に入力されて比較されることにより、ボイラ状
態の変化が推定され、該推定結果に基づいて演算、調整
されたパラメータ修正信号１４がボイラ制御装置２に入
力されて、制御パラメータが修正される。On the other hand, the boiler state quantity is constantly grasped by the boiler state quantity calculation circuit 11 to which the boiler each part recovery signal 10 and the detection signal 12 from the boiler each part recovery calculation circuit 9 are input, and in this way, the boiler state quantity is grasped over time. The changing boiler state quantity signal 13 and the predicted combustion coal characteristic 7 are inputted to the control parameter correction calculation circuit 8 and compared, whereby a change in the boiler state is estimated, and the boiler state is calculated and adjusted based on the estimation result. The parameter correction signal 14 thus obtained is input to the boiler control device 2, and the control parameters are corrected.
上記により、同一炭種での性状の変化及び経時的な性状
の変化に対しても、ボイラ状態量の変化からそれを検出
してパラメータ修正信号１４を適正に調整するようにし
ているので、制御性の向上を図ることができる。As a result of the above, the parameter correction signal 14 is appropriately adjusted by detecting changes in the boiler state quantities even in the case of changes in the properties of the same type of coal or changes in properties over time. It is possible to improve sexual performance.
尚、本発明は上記実施例にのみ限定されるものではなく
、石炭以外に重油等の油焚ボイラ等の制御にも適用でき
ること、その池水発明の要旨を逸脱しない範囲内におい
て種々変更を加え得る。It should be noted that the present invention is not limited only to the above-mentioned embodiments, but can also be applied to the control of oil-fired boilers, etc. that use fuel other than coal, such as heavy oil, and various modifications can be made within the scope of the invention. .
［発明の効果コ
上記したように、本発明のボイラ制御方法によれば、燃
料の性状に基づいて予測した予測燃焼炭特性（予測ボイ
ラ特性）と、実測された情報に基づいて常時演算を行っ
て求めたボイラ状態量とを比較して、ボイラ状態の変化
を予測し、その予測結果に基づいて求めたパラメータ修
正信号により制御パラメータを自動的に修正するように
しているので、燃料の性状の計測誤差、同一燃料での性
状のばらつきや経時的変化等があっても、常に最適パラ
メータとなるように制御パラメータを修正して、常に安
定した制御性を確保できる優れた効果を奏し得る。[Effects of the Invention] As described above, according to the boiler control method of the present invention, calculations are constantly performed based on the predicted combustion coal characteristics (predicted boiler characteristics) predicted based on the properties of the fuel and the actually measured information. The control parameters are automatically corrected using the parameter correction signal obtained based on the prediction result, and the control parameters are automatically corrected by the parameter correction signal obtained based on the prediction result. Even if there are measurement errors, variations in properties of the same fuel, changes over time, etc., the control parameters can be corrected to always be the optimum parameters, and an excellent effect can be achieved in that stable controllability can always be ensured.
第１図は本発明の方法を実施する装置の一例を示す説明
図、第２図は従来装置の一例を示す説明図である。
１は発電機出力指令、２はボイラ制御装置、３はボイラ
、５は燃料性状分析値、６は予測演算回路、７は予測燃
焼炭特性（予測ボイラ特性）８は制御パラメータ修正演
算回路、９はボイラ各部収態演算回路、１０はボイラ各
部収熱信号、１１はボイラ状態量演算回路、１２は検出
信号、１３はボイラ状態量信号、１４はパラメータ修正
信号を示す。FIG. 1 is an explanatory diagram showing an example of an apparatus for carrying out the method of the present invention, and FIG. 2 is an explanatory diagram showing an example of a conventional apparatus. 1 is a generator output command, 2 is a boiler control device, 3 is a boiler, 5 is a fuel property analysis value, 6 is a prediction calculation circuit, 7 is a predicted combustion coal characteristic (prediction boiler characteristic), 8 is a control parameter correction calculation circuit, 9 10 indicates a boiler heat absorption signal for each part, 11 indicates a boiler state quantity computing circuit, 12 indicates a detection signal, 13 indicates a boiler state quantity signal, and 14 indicates a parameter correction signal.
Claims (1)
、温度から求めたボイラ各部の収熱信号、及びボイラ各
部の検出信号から演算して得たボイラ状態量と燃料性状
値を用いた予測ボイラ特性とを比較して、ボイラ状態の
変化を推定し、その推定結果をもとにパラメータ修正信
号を演算して該パラメータ修正信号によりボイラ制御装
置の制御パラメータを修正することを特徴とするボイラ
制御方法。1) Predictive boiler using boiler state quantities and fuel property values calculated from heat absorption signals of each part of the boiler calculated from the pressure and temperature of each part of the boiler that are input to the boiler control device, and detection signals of each part of the boiler. A boiler control characterized by estimating a change in the boiler state by comparing the characteristics, calculating a parameter correction signal based on the estimation result, and correcting the control parameters of the boiler control device using the parameter correction signal. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63107282A JP2574387B2 (en) | 1988-04-28 | 1988-04-28 | Coal-fired boiler control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63107282A JP2574387B2 (en) | 1988-04-28 | 1988-04-28 | Coal-fired boiler control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01277102A true JPH01277102A (en) | 1989-11-07 |
| JP2574387B2 JP2574387B2 (en) | 1997-01-22 |
Family
ID=14455126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63107282A Expired - Lifetime JP2574387B2 (en) | 1988-04-28 | 1988-04-28 | Coal-fired boiler control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2574387B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008506087A (en) * | 2004-07-09 | 2008-02-28 | シーメンス アクチエンゲゼルシヤフト | Method for operation of once-through boiler |
| CN112833420A (en) * | 2020-12-17 | 2021-05-25 | 华能莱芜发电有限公司 | Automatic coal feeding optimization system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170304A (en) * | 1984-09-12 | 1986-04-11 | 株式会社日立製作所 | Method of controlling steam temperature of thermal power plant |
| JPS62280504A (en) * | 1986-05-28 | 1987-12-05 | 株式会社日立製作所 | Control arithmetic-constant compensator for thermal power plant |
-
1988
- 1988-04-28 JP JP63107282A patent/JP2574387B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170304A (en) * | 1984-09-12 | 1986-04-11 | 株式会社日立製作所 | Method of controlling steam temperature of thermal power plant |
| JPS62280504A (en) * | 1986-05-28 | 1987-12-05 | 株式会社日立製作所 | Control arithmetic-constant compensator for thermal power plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008506087A (en) * | 2004-07-09 | 2008-02-28 | シーメンス アクチエンゲゼルシヤフト | Method for operation of once-through boiler |
| JP4704427B2 (en) * | 2004-07-09 | 2011-06-15 | シーメンス アクチエンゲゼルシヤフト | Method for operation of once-through boiler |
| CN112833420A (en) * | 2020-12-17 | 2021-05-25 | 华能莱芜发电有限公司 | Automatic coal feeding optimization system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2574387B2 (en) | 1997-01-22 |
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