JPH0577926B2 - - Google Patents
Info
- Publication number
- JPH0577926B2 JPH0577926B2 JP61214920A JP21492086A JPH0577926B2 JP H0577926 B2 JPH0577926 B2 JP H0577926B2 JP 61214920 A JP61214920 A JP 61214920A JP 21492086 A JP21492086 A JP 21492086A JP H0577926 B2 JPH0577926 B2 JP H0577926B2
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- furnace gas
- calorific value
- flow rate
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2221/00—Pretreatment or prehandling
- F23N2221/06—Preheating gaseous fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、高炉ガスを燃料とするボイラにおけ
る、高炉ガス発熱量の変動を制御する高炉ガス焚
ボイラにおける高炉ガス発熱量補正装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a blast furnace gas calorific value correction device for a blast furnace gas-fired boiler that controls fluctuations in blast furnace gas calorific value in a boiler that uses blast furnace gas as fuel.
従来の技術
従来から、製鉄所では、所内で大量に発生する
副生ガスのエネルギー回収を目的として、副生ガ
スを燃料とするボイラが設置されており、その一
つとして高炉の副生ガスである高炉ガスを燃料と
する高炉ガス焚ボイラがある。Conventional technology Traditionally, steelworks have installed boilers that use byproduct gas as fuel for the purpose of recovering energy from the large amounts of byproduct gas generated within the plant. There is a blast furnace gas-fired boiler that uses blast furnace gas as fuel.
一方、一般に製鉄所で発生する副生ガスは、
量、発熱量ともに比較的不安定である。特に高炉
ガスは、高炉の炉況の影響を受けやすくて発熱量
の変動が大きく、ボイラの自動燃焼制御系に及ぼ
す影響が大きい。これの対策として、従来はガス
ホルダを設けて、その変動を小さくするような配
慮がなされ、また最近では、ガスクロマトグラフ
により高炉ガスの性状を分析して、計算機で発熱
量を計算することも行なわれている。 On the other hand, by-product gases generally generated in steel plants are
Both the amount and calorific value are relatively unstable. In particular, blast furnace gas is easily affected by the furnace conditions of the blast furnace and has large fluctuations in calorific value, which has a large effect on the automatic combustion control system of the boiler. As a countermeasure to this, conventional measures have been taken to reduce the fluctuations by installing a gas holder.More recently, it has also been done to analyze the properties of blast furnace gas using a gas chromatograph and calculate the calorific value using a computer. ing.
発明が解決しようとする問題点
上記のごとく、高炉ガス焚ボイラにおいて、高
炉ガスの発熱量等の変動の対策として、従来ガス
ホルダを介在させているが、高炉吹抜け時の発熱
量の突変（増大）によるボイラの変動（発熱量の
増大）を抑制することは困難であり、またガスク
ロマトグラフにより高炉ガスを分析して発熱量を
計算機で計算する方法は非常に高価で実際的でな
いなどの問題点があつた。Problems to be Solved by the Invention As mentioned above, in a blast furnace gas-fired boiler, a gas holder has conventionally been used as a countermeasure against fluctuations in the calorific value of blast furnace gas, etc. ) It is difficult to suppress fluctuations in the boiler (increase in calorific value) caused by this, and the method of analyzing blast furnace gas using a gas chromatograph and calculating the calorific value with a computer is extremely expensive and impractical. It was hot.
本発明は、上記のごとき問題点を解決するもの
であつて、高炉ガス焚ボイラにおいて、高炉吹抜
け時の発熱量が突変した場合、高価な制御装置を
必要とすることなく、ボイラの変動を抑える高炉
ガス発熱量補正装置を提供することを目的とする
ものである。 The present invention solves the above-mentioned problems.In a blast furnace gas-fired boiler, when the amount of heat generated during blast furnace blow-through suddenly changes, the fluctuation of the boiler can be controlled without the need for an expensive control device. The object of the present invention is to provide a blast furnace gas calorific value correction device that suppresses the amount of heat generated by blast furnace gas.
問題点を解決するための手段
上記問題点を解決するため本発明の高炉ガス焚
ボイラにおける高炉ガス発熱量補正装置は、高炉
ガス焚ボイラにおいて、高炉ガス流量を検出する
流量検出器と、高炉ガス温度を検出する温度検出
器と、高炉ガス圧力を検出する圧力検出器と、前
記温度検出器の出力および圧力検出器の出力によ
り流量検出器の出力を補正演算する温圧補正演算
器と、前記温度検出器の出力に基づき高炉ガス発
熱量に対応して前記温圧補正演算器の出力を補正
演算する発熱量補正演算器と、前記発熱量補正演
算器の出力を流量設定値と比較演算する流量調節
計と、前記流量調節計の出力によりボイラへの高
炉ガスの流量を調節する高炉ガス流量調節弁とか
らなることを特徴とするものである。Means for Solving the Problems In order to solve the above problems, a blast furnace gas calorific value correction device for a blast furnace gas fired boiler according to the present invention includes a flow rate detector for detecting a blast furnace gas flow rate, and a blast furnace gas calorific value correction device for a blast furnace gas fired boiler. a temperature detector for detecting temperature; a pressure detector for detecting blast furnace gas pressure; a temperature-pressure correction calculator for correcting the output of the flow rate detector based on the output of the temperature detector and the output of the pressure detector; a calorific value correction calculator that corrects the output of the temperature and pressure correction calculator based on the blast furnace gas calorific value based on the output of the temperature detector; and a calorific value correction calculator that compares and calculates the output of the calorific value correction calculator with a flow rate setting value. It is characterized by comprising a flow rate controller and a blast furnace gas flow rate control valve that adjusts the flow rate of blast furnace gas to the boiler based on the output of the flow rate controller.
作 用
高炉吹抜けのとき、高炉ガス中の燃焼成分１０
が増加して発熱量が増大し、それとともに高炉ガ
スの温度、圧力も上昇し、発熱量は近似的に温度
の関数として把握することができる。従つて本発
明において、上記のごとく温度検出器の出力に基
づいて、発熱量補正演算器により高炉ガスの発熱
量に対応して、温圧補正演算器の高炉ガス流量に
比例する出力をさらに補正演算し、この発熱量補
正演算器の出力に基づいて流量調節計によりボイ
ラへの高炉ガスの流量を決定し、高炉ガス流量調
節弁を作動して流量を調節し、ボイラにおける高
炉ガスの発熱量を補正することができる。Effect When blowing through the blast furnace, the combustion components in the blast furnace gas are 10
increases, the calorific value increases, and the temperature and pressure of the blast furnace gas also rise, and the calorific value can be approximately understood as a function of temperature. Therefore, in the present invention, based on the output of the temperature detector as described above, the calorific value correction calculator further corrects the output proportional to the blast furnace gas flow rate of the temperature and pressure correction calculator in accordance with the calorific value of the blast furnace gas. Based on the output of this calorific value correction calculator, the flow rate of blast furnace gas to the boiler is determined by the flow controller, and the blast furnace gas flow rate control valve is operated to adjust the flow rate, thereby adjusting the calorific value of blast furnace gas in the boiler. can be corrected.
実施例
本発明の一実施例を図面に基づいて説明する。
第１図は本発明の一実施例の高炉ガスの発熱量補
正装置のブロツク線図である。高炉設備１で発生
する高炉ガスは、高炉ガス管路２を経てボイラ設
備３内のボイラ４のバーナ５へ供給される。６は
ガスホルダである。高炉設備１から供給される高
炉ガスは、ボイラ４における発熱量が高炉ガス発
熱量補正装置１１により補正される。Embodiment An embodiment of the present invention will be described based on the drawings.
FIG. 1 is a block diagram of a blast furnace gas calorific value correction device according to an embodiment of the present invention. Blast furnace gas generated in the blast furnace equipment 1 is supplied to the burner 5 of the boiler 4 in the boiler equipment 3 via the blast furnace gas pipeline 2. 6 is a gas holder. The calorific value of the blast furnace gas supplied from the blast furnace equipment 1 in the boiler 4 is corrected by the blast furnace gas calorific value correction device 11 .
前記高炉ガス発熱量補正装置１１において、１
２は高炉ガス流量を差圧信号として検出する差圧
式流量検出器であり、１３は高炉ガスの温度を検
出する温度検出器であり、１４は同じく高炉ガス
の圧力を検出する圧力検出器である。１５は前記
差圧式流量検出器１２で検出した高炉ガス流量の
差圧信号を、温度検出器１３および圧力検出器１
４の各出力信号により補正演算して、温圧補正さ
れた高炉ガス流量に比例する信号を出力する温圧
補正演算器であり、温圧補正器１６と開平演算器
１７とからなつている。１８は前記温度検出器１
３の出力に基づき、高炉ガスの発熱量に対応して
前記温圧補正演算器１５の出力を補正演算する発
熱量補正演算器であり、発熱量補正器１９と乗算
器２０で構成している。２１は流量調節計であ
り、前記発熱量補正演算器１８から入力される発
熱量補正された流量に比例する信号を、流量設定
信号と比較演算して流量制御信号を出力する。２
２は前記流量調節計２１から出力される流量制御
信号に基づき、高路ガス管炉２からボデイ４のバ
ーナ５へ供給される高炉ガスの流量を調節する高
炉ガスの流量調節弁である。 In the blast furnace gas calorific value correction device 11, 1
2 is a differential pressure flow rate detector that detects the blast furnace gas flow rate as a differential pressure signal, 13 is a temperature detector that detects the temperature of the blast furnace gas, and 14 is a pressure detector that similarly detects the pressure of the blast furnace gas. . 15 transmits the differential pressure signal of the blast furnace gas flow rate detected by the differential pressure type flow rate detector 12 to the temperature detector 13 and the pressure detector 1.
This is a temperature-pressure correction calculator that performs correction calculations using each output signal of 4 and outputs a signal proportional to the temperature-pressure corrected blast furnace gas flow rate, and is made up of a temperature-pressure corrector 16 and a square root calculator 17. 18 is the temperature sensor 1
3 is a calorific value correction calculator that corrects the output of the temperature and pressure correction calculator 15 in accordance with the calorific value of blast furnace gas, and is composed of a calorific value corrector 19 and a multiplier 20. . Reference numeral 21 denotes a flow rate controller, which compares and calculates a signal proportional to the flow rate corrected for the calorific value inputted from the calorific value correction calculator 18 with a flow rate setting signal, and outputs a flow rate control signal. 2
Reference numeral 2 denotes a blast furnace gas flow rate control valve that adjusts the flow rate of blast furnace gas supplied from the high passage gas tube furnace 2 to the burner 5 of the body 4 based on a flow rate control signal output from the flow rate controller 21.
上記の高炉ガス焚のボイラ設備３に設けた高炉
ガス発熱量補正装置１１により、高炉吹抜け時の
ごとく炉況が大きく変化して高炉ガスの発熱量が
増大するような場合に、ボイラ４における高炉ガ
ス発熱量を補正してボイラ４の変動を軽減すると
ができる。すなわち、高炉の吹抜け時には、高炉
ガスはCOを主とする燃焼成分が増加して発熱量
が増大するとともに、温度および圧力が上昇す
る。その事実に基づき高炉ガスの発熱量に対応す
る補正信号を、第２図に示すごとく近似的に温度
の関数として、発熱量補正演算器１８により出力
し〔定格温度＋α（不感帯）までは出力一定〕、か
つ温圧補正演算器１５により温度および圧力で補
正されて出力された高炉ガス流量に比例する信号
を補正演算する。そしてその出力に基づいて流量
調節計２１で流量制御信号を出力し、高炉ガス流
量調節弁２２により高炉ガス管路２からボイラ４
のバーナ５へ送られる高炉ガスの流量を調節し、
それにより高炉ガスの発熱量が補正されて、ボイ
ラ４の変動が軽減される。 The blast furnace gas calorific value correction device 11 provided in the blast furnace gas-fired boiler equipment 3 described above allows the blast furnace gas calorific value correction device 11 in the boiler 4 to Fluctuations in the boiler 4 can be reduced by correcting the gas calorific value. That is, during the blow-through of the blast furnace, the combustion components, mainly CO, increase in the blast furnace gas, the calorific value increases, and the temperature and pressure rise. Based on this fact, a correction signal corresponding to the calorific value of the blast furnace gas is outputted by the calorific value correction calculator 18 approximately as a function of temperature as shown in FIG. ], and a signal proportional to the blast furnace gas flow rate corrected by temperature and pressure and outputted by the temperature and pressure correction calculator 15 is corrected and calculated. Based on the output, the flow rate controller 21 outputs a flow rate control signal, and the blast furnace gas flow rate control valve 22 connects the blast furnace gas pipe 2 to the boiler 4.
adjusting the flow rate of blast furnace gas sent to burner 5 of
As a result, the calorific value of the blast furnace gas is corrected, and fluctuations in the boiler 4 are reduced.
なお上記実施例において、発熱量補正器１９に
圧力検出器１４の出力を微分信号として加算しう
るようにすることにより、温度検出器１３による
温度検出の遅れを補正することができる。また発
熱量補正演算器１８には、ボイラ４のバーナ５の
安定した燃焼を確保する最低高炉ガス流量を保証
するための上限リミツタＬ（第２図）を設けるこ
とが望ましい。 In the above embodiment, the delay in temperature detection by the temperature detector 13 can be corrected by adding the output of the pressure detector 14 as a differential signal to the calorific value corrector 19. Further, it is preferable that the calorific value correction calculator 18 is provided with an upper limiter L (FIG. 2) for guaranteeing a minimum blast furnace gas flow rate that ensures stable combustion in the burner 5 of the boiler 4.
発明の効果
本発明により、高炉ガス焚ボイラにおいて、高
炉の吹抜けなどの炉況の変化により高炉ガスの発
熱量が増大するなどの変化が生じても、温度検出
器の出力に基づいて発熱量補正演算器により高炉
ガスの流量を補正演算して、ボイラへの高炉ガス
の流量を制御して高炉ガス発熱量を補正し、ボイ
ラの変動を極めて容易に抑えることができる。Effects of the Invention According to the present invention, in a blast furnace gas-fired boiler, even if changes such as an increase in the calorific value of blast furnace gas occur due to changes in furnace conditions such as blast furnace blow-through, the calorific value is corrected based on the output of the temperature detector. The flow rate of the blast furnace gas is corrected by the computing unit, the flow rate of the blast furnace gas to the boiler is controlled, the calorific value of the blast furnace gas is corrected, and fluctuations in the boiler can be suppressed very easily.
第１図は本発明の一実施例を示すブロツク線
図、第２図は発熱量補正演算器における高炉ガス
の温度と発熱量に対応する補正信号出力との関数
関係を例示するグラフである。
４……ボイラ、５……ノズル、１１……高炉ガ
ス発熱量補正装置、１２……差圧式流量検出器、
１３……温度検出器、１４……圧力検出器、１５
……温圧補正演算器、１８……発熱量補正演算
器、１９……発熱量補正器、２０……乗算器、２
１……流量調節計、２２……高炉ガス流量調節
弁。
FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a graph illustrating the functional relationship between the temperature of blast furnace gas and the correction signal output corresponding to the calorific value in the calorific value correction calculator. 4... Boiler, 5... Nozzle, 11... Blast furnace gas calorific value correction device, 12... Differential pressure flow rate detector,
13...Temperature detector, 14...Pressure detector, 15
...Temperature pressure correction calculator, 18... Calorific value correction calculator, 19... Calorific value corrector, 20... Multiplier, 2
1...Flow rate controller, 22...Blast furnace gas flow rate control valve.
Claims (1)
検出する流量検出器と、高炉ガス温度を検出する
温度検出器と、高炉ガス圧力を検出する圧力検出
器と、前記温度検出器の出力および圧力検出器の
出力により流量検出器の出力を補正演算する温圧
補正演算器と、前記温度検出器の出力に基づき高
炉ガス発熱量に対応して前記温圧補正演算器の出
力を補正演算する発熱量補正演算器と、前記発熱
量補正演算器の出力を流量設定値と比較演算する
流量調節計と、前記流量調節計の出力によりボイ
ラへの高炉ガスの流量を調節する高炉ガス流量調
節弁とからなることを特徴とする高炉ガス焚ボイ
ラにおける高炉ガス発熱量補正装置。1 In a blast furnace gas-fired boiler, a flow rate detector that detects the blast furnace gas flow rate, a temperature detector that detects the blast furnace gas temperature, a pressure detector that detects the blast furnace gas pressure, and an output and pressure detector of the temperature detector a temperature-pressure correction calculator that corrects the output of the flow rate detector based on the output of the temperature sensor; and a calorific value correction that corrects the output of the temperature-pressure correction calculator in accordance with the blast furnace gas calorific value based on the output of the temperature detector. It consists of a calculator, a flow controller that compares and calculates the output of the calorific value correction calculator with a flow rate set value, and a blast furnace gas flow rate control valve that adjusts the flow rate of blast furnace gas to the boiler based on the output of the flow controller. A blast furnace gas calorific value correction device for a blast furnace gas fired boiler, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61214920A JPS6370022A (en) | 1986-09-11 | 1986-09-11 | Blast furnace gas calorific value correction device for blast furnace gas fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61214920A JPS6370022A (en) | 1986-09-11 | 1986-09-11 | Blast furnace gas calorific value correction device for blast furnace gas fired boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6370022A JPS6370022A (en) | 1988-03-30 |
| JPH0577926B2 true JPH0577926B2 (en) | 1993-10-27 |
Family
ID=16663764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61214920A Granted JPS6370022A (en) | 1986-09-11 | 1986-09-11 | Blast furnace gas calorific value correction device for blast furnace gas fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014169825A (en) * | 2013-03-04 | 2014-09-18 | Nippon Steel & Sumitomo Metal | Fuel control method under blast furnace open ceiling in blast furnace gas-fired boiler and fuel control device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59502756D1 (en) * | 1995-01-30 | 1998-08-13 | Landis & Gyr Tech Innovat | Control device for a gas fan burner |
| JP2016020791A (en) * | 2014-07-15 | 2016-02-04 | 三浦工業株式会社 | Boiler system |
| JP6413415B2 (en) * | 2014-07-15 | 2018-10-31 | 三浦工業株式会社 | Boiler equipment |
| JP6409382B2 (en) * | 2014-07-15 | 2018-10-24 | 三浦工業株式会社 | Boiler equipment |
| JP6492434B2 (en) * | 2014-07-15 | 2019-04-03 | 三浦工業株式会社 | Boiler equipment |
| JP6597662B2 (en) * | 2017-02-08 | 2019-10-30 | トヨタ自動車株式会社 | Hydrogen gas burner equipment |
-
1986
- 1986-09-11 JP JP61214920A patent/JPS6370022A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014169825A (en) * | 2013-03-04 | 2014-09-18 | Nippon Steel & Sumitomo Metal | Fuel control method under blast furnace open ceiling in blast furnace gas-fired boiler and fuel control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6370022A (en) | 1988-03-30 |
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