JPH0996227A - Pressure controller of gasification plant - Google Patents
Pressure controller of gasification plantInfo
- Publication number
- JPH0996227A JPH0996227A JP7256332A JP25633295A JPH0996227A JP H0996227 A JPH0996227 A JP H0996227A JP 7256332 A JP7256332 A JP 7256332A JP 25633295 A JP25633295 A JP 25633295A JP H0996227 A JPH0996227 A JP H0996227A
- Authority
- JP
- Japan
- Prior art keywords
- booster
- pressure
- gas turbine
- pressure control
- gasification 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はガス化プラントの空
気・ガス系圧力制御装置もしくは昇圧機制御装置に適用
される制御アルゴリズムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control algorithm applied to an air / gas system pressure controller or a booster controller of a gasification plant.
【０００２】[0002]
【従来の技術】図４は石炭ガス化複合発電プラントの一
例を示す概要図である。この図に示されるように、石炭
ガス化複合発電プラントは、ガス化炉設備（１００）、
脱塵設備（１１０）、脱硫設備（１２０）、ガスタービ
ン発電機（１３２）、（１３３）、排熱回収ボイラ（１
４０）、蒸気タービン発電機（１５０）、（１５１）、
空気昇圧機（１６１）、（１６２）、石炭供給装置（１
７０）等から成る。石炭供給装置（１７０）から微粉炭
を圧縮空気とともにガス化炉（１０１）内へ噴射して、
ガス化剤（空気または酸素）で燃焼させることにより石
炭をガス化する。2. Description of the Related Art FIG. 4 is a schematic diagram showing an example of an integrated coal gasification combined cycle power plant. As shown in this figure, the integrated coal gasification combined cycle power plant has a gasification furnace facility (100),
Dust removal equipment (110), desulfurization equipment (120), gas turbine generators (132), (133), exhaust heat recovery boiler (1
40), steam turbine generator (150), (151),
Air boosters (161), (162), coal feeder (1
70) and the like. Injecting pulverized coal with compressed air into the gasification furnace (101) from the coal supply device (170),
Coal is gasified by burning it with a gasifying agent (air or oxygen).
【０００３】ガス化炉（１０１）で生成した石炭ガス
は、ガス化炉後方のガス冷却器（１０２）で冷却された
後、チャー回収系（１０３）、脱塵設備（１１０）、脱
硫設備（１２０）で石炭ガスを精製した後、ガスタービ
ン燃焼器へ送られて発電を行なう。また、ガスタービン
駆動の空気圧縮機（１３４）から取り出された抽気は、
ガス化炉圧力調整のために空気昇圧機（１６１）、（１
６２）で昇圧された後、搬送用および燃焼用として加圧
状態のガス化炉に圧入される。The coal gas produced in the gasification furnace (101) is cooled in a gas cooler (102) at the rear of the gasification furnace, and then a char recovery system (103), a dust removal equipment (110), a desulfurization equipment ( After refining the coal gas in 120), the coal gas is sent to a gas turbine combustor for power generation. Further, the bleed air extracted from the air compressor (134) driven by the gas turbine is
Air boosters (161), (1
After the pressure is increased in 62), it is pressed into a gasification furnace in a pressurized state for transportation and combustion.
【０００４】石炭ガス化複合発電においては、ガス冷却
器（１０２）で発生した主蒸気とガスタービン後流のガ
ス処理装置付き排熱回収ボイラ（１４０）で発生した主
蒸気を全量、蒸気タービン（１５０）で混圧結合し発電
することができる程の蒸気発生となり、加圧燃焼の効果
もあって、排熱回収ＬＮＧ複合発電とはガスタービン／
蒸気タービンの負荷配分が異なる。In the integrated coal gasification combined cycle power generation, the main steam generated in the gas cooler (102) and the main steam generated in the exhaust heat recovery boiler (140) with a gas treatment device downstream of the gas turbine are entirely combusted in the steam turbine ( At 150), steam is generated so that it can be mixed pressure combined to generate electricity, and because of the effect of pressurized combustion, the exhaust heat recovery LNG combined power generation is a gas turbine /
The steam turbine load distribution is different.
【０００５】図５は従来の石炭ガス化炉圧力制御方式の
一例を示す図である。この図に示すように、圧力設定器
（３０）による圧力設定に対して、ガス化炉出口圧力
（３１）と脱塵装置出口圧力信号（３２）を比較してカ
スケードフィードバックを行ない、Ｃ１弁（ガス焼却炉
入口圧力調節弁）開度指令（３３）とともにＣ１弁に対
する開度制御（３４）を行なっている。このガス化炉出
口圧力制御ブロック（３５）によって構成されたガス化
炉圧力制御指令（３６）は、昇圧機吐出圧力設定器（３
７）に渡されて、昇圧機吐出圧力信号（４０）と比較
し、昇圧機吐出圧力制御装置（３８）によって空気昇圧
機入口案内ベーン開度（３９）を操作する。FIG. 5 is a diagram showing an example of a conventional coal gasification furnace pressure control system. As shown in this figure, the gasifier outlet pressure (31) and the dust remover outlet pressure signal (32) are compared with respect to the pressure set by the pressure setter (30) to perform cascade feedback, and the C1 valve ( The opening control (34) for the C1 valve is performed together with the gas incinerator inlet pressure control valve) opening command (33). The gasifier pressure control command (36) constituted by the gasifier outlet pressure control block (35) is supplied to the booster discharge pressure setter (3).
7) and compared to the booster discharge pressure signal (40) to operate the air booster inlet guide vane opening (39) by the booster discharge pressure controller (38).
【０００６】また、制御モードがガス化炉負荷制御モー
ド（４２）からガス化炉圧力制御モード（４３）に切り
換えられた時には、ガス化炉負荷指令信号（４４）の代
わりにガス化炉圧力制御指令（３６）がガス化炉入力指
令（ＧＩＤ）信号（３７）として燃料および空気流量の
制御を行なうようになっている。When the control mode is switched from the gasifier load control mode (42) to the gasifier pressure control mode (43), the gasifier load control signal (44) is used instead of the gasifier pressure control signal (44). The command (36) serves as a gasifier input command (GID) signal (37) to control the fuel and air flow rates.
【０００７】上記のように、従来のガス化プラントの負
荷・圧力・制御においては、ガス化炉入力要求に対して
負荷・圧力制御の切り換えが採用され、またガスタービ
ンリード、ガス化炉リード、協調制御が提案されたが、
昇圧機吐出圧力は一定値制御されていた。また、それと
は独立にガス化炉圧力に比して一定差圧だけ高くするこ
とにより、昇圧機吐出圧力が必要以上に高くなることを
防止する方法が提案されていた。As described above, in the load / pressure / control of the conventional gasification plant, switching of the load / pressure control is adopted in response to the gasifier input request, and the gas turbine lead, gasifier lead, Cooperative control was proposed,
The booster discharge pressure was controlled at a constant value. In addition, a method has been proposed that prevents the booster discharge pressure from becoming unnecessarily high by independently increasing the pressure by a certain differential pressure compared to the gasifier pressure.
【０００８】[0008]
【発明が解決しようとする課題】前記従来の圧力制御方
式には、次のような解決すべき課題があった。The above-mentioned conventional pressure control system has the following problems to be solved.
【０００９】１）ガス化炉の圧力は、負荷変化等の外乱
に対しても大きな変動をしないように制御を行なわない
と、給炭系との差圧の変動のために燃料流量の脈動や逆
流を引き起こす恐れがある。1) Unless the pressure of the gasification furnace is controlled so as not to change significantly even with disturbances such as load changes, fuel pressure pulsation and pulsation due to fluctuations in the pressure difference with the coal feeding system will occur. May cause reflux.
【００１０】２）昇圧機の吐出圧力は、高負荷帯におけ
る制御性を考えて調整すると、低負荷帯における安定性
が損なわれてハンチングを起こす恐れがある。2) If the discharge pressure of the booster is adjusted in consideration of controllability in the high load zone, stability in the low load zone may be impaired and hunting may occur.
【００１１】３）昇圧機の吸込流量が低負荷帯で規定値
よりも少なくなると、サージングを引き起こす恐れがあ
る。3) If the suction flow rate of the booster is less than the specified value in the low load zone, surging may occur.
【００１２】４）昇圧機の吸気湿度が高い場合に過冷却
を行なうと、ドレンが発生して昇圧機が液圧縮を起こし
たり、初段にエロージョンを起こす恐れがある。4) If supercooling is performed when the intake air humidity of the booster is high, there is a risk that drainage may occur and the booster may cause liquid compression or erosion in the first stage.
【００１３】[0013]
【課題を解決するための手段】本発明者は、前記従来の
課題を解決するために、下記１）ないし７）に示される
ガス化プラントの圧力制御装置を提案するものである。In order to solve the above-mentioned conventional problems, the present inventor proposes a pressure control device for a gasification plant shown in 1) to 7) below.
【００１４】１）固体燃料または液体燃料をガス化する
ガス化炉と、そのガス化炉で発生したガスを燃焼させて
発電するガスタービンと、そのガスタービンと同軸結合
された空気圧縮機と、その空気圧縮機の抽気を昇圧して
上記ガス化炉へ送給する昇圧機とを備え、ガスタービン
デマンドの関数としてガス化炉圧力設定を構成し、ガス
タービンガバナ弁開度指令およびガス化炉入力デマンド
による負荷制御およびガス化炉圧力制御に対してガスタ
ービン出力偏差の修正とともにガス化炉圧力偏差の修正
を行なう協調制御装置において、空気供給弁とガスター
ビンガバナ弁を制御するとともに上記昇圧機の吐出圧力
を制御する手段を備え、その設定値を、ガス化炉圧力設
定に対してガス化炉へ供給される空気量により定まる圧
損分を上乗せして設定し、上記昇圧機吐出圧力制御手段
の調節によって昇圧機の吐出圧力を制御することを特徴
とするガス化プラントの圧力制御装置。1) A gasification furnace for gasifying a solid fuel or a liquid fuel, a gas turbine for combusting the gas generated in the gasification furnace to generate electricity, and an air compressor coaxially connected to the gas turbine. The gas compressor is provided with a booster for boosting the bleed air of the air compressor and feeding it to the gasification furnace, and the gasification furnace pressure setting is configured as a function of the gas turbine demand. The gas turbine governor valve opening command and the gasification furnace are provided. In a coordinated control device for correcting gas turbine output deviation as well as gasifier pressure deviation for load control and gasifier pressure control by input demand, in the booster, controlling an air supply valve and a gas turbine governor valve. Is equipped with a means for controlling the discharge pressure, and the set value is added to the gasification furnace pressure setting by the pressure loss determined by the amount of air supplied to the gasification furnace. Constant, and controlling the discharge pressure of the booster by adjusting the pressure control device of the gasification plant, wherein the booster discharge pressure control means.
【００１５】２）上記要件に加えて、上記昇圧機の吐出
圧力制御手段として昇圧機の入口案内ベーンを用いるこ
とを特徴とするガス化プラントの圧力制御装置。2) In addition to the above requirements, a pressure control device for a gasification plant, characterized in that an inlet guide vane of the booster is used as the discharge pressure control means of the booster.
【００１６】３）上記１）の要件に加えて、上記昇圧機
の吐出圧力制御手段として昇圧機の回転数制御を用いる
ことを特徴とするガス化プラントの圧力制御装置。3) In addition to the requirement of 1) above, a pressure control device for a gasification plant is characterized in that a rotation speed control of a booster is used as a discharge pressure control means of the booster.
【００１７】４）上記１）の要件に加えて、上記昇圧機
の吐出圧力制御手段として昇圧機上流に設置した入口弁
を用いることを特徴とするガス化プラントの圧力制御装
置。4) In addition to the requirements of 1) above, a pressure control device for a gasification plant, characterized in that an inlet valve installed upstream of the booster is used as the discharge pressure control means of the booster.
【００１８】５）上記１）の要件に加えて、上記ガスタ
ービン負荷指令の関数として制御器のゲインを定め、低
負荷ほど小さく設定することを特徴とするガス化プラン
トの圧力制御装置。5) In addition to the requirements of 1) above, a pressure control device for a gasification plant is characterized in that the gain of the controller is determined as a function of the gas turbine load command, and the gain is set smaller as the load becomes lower.
【００１９】６）上記１）の要件に加えて、上記昇圧機
の圧縮比の関数として定まるサージングライン以上の吸
込流量を確保するように、再循環弁の開度を自動調節す
ることを特徴とするガス化プラントの圧力制御装置。6) In addition to the requirement of 1) above, the opening of the recirculation valve is automatically adjusted so as to secure a suction flow rate above the surging line determined as a function of the compression ratio of the booster. Pressure control device for gasification plant.
【００２０】７）上記１）の要件に加えて、上記上乗せ
する圧損分ΔＰを次式で定めることを特徴とするガス化
プラントの圧力制御装置。7) In addition to the requirement of 1) above, a pressure controller for a gasification plant is characterized in that the pressure loss component ΔP to be added is determined by the following equation.
【００２１】ΔＰ＝Ｋ（Ｐｏ／Ｐ）（Ｔ／Ｔｏ）Ｗ2 ここに Ｋ：定格点での流調弁Ｃｖ値および配管等の圧
損抵抗から定まる係数 Ｐｏ、Ｔｏ：定格点での圧力、温度 Ｐ、Ｔ ：運転状態での圧力、温度 Ｗ ：空気流量 上記１）ないし４）のように制御すると、負荷変動によ
る空気流量変化があったとしても、空気流調弁の開度を
規定値＋α％の範囲に抑えることができるので、一定差
圧分上乗せする場合よりも、弁のレンジアビリティを広
げ流量制御装置の感度を上げることができるとともに、
全閉／全開までの裕度が増すので外乱に対する対応力／
耐力を上げることができる。また負荷変化に対するガス
タービンガバナ弁の動きによって発生するガス圧力の変
動分を、圧力修正項によって打ち消すことができる。ΔP = K (Po / P) (T / To) W 2 Here, K: coefficient determined by Cv value of flow control valve at rated point and pressure loss resistance of piping etc. Po, To: pressure at rated point, Temperature P, T: Pressure in operating state, temperature W: Air flow rate When controlled as in the above 1) to 4), even if the air flow rate changes due to load fluctuation, the opening of the air flow control valve will be the specified value. Since it can be suppressed within the range of + α%, the rangeability of the valve can be expanded and the sensitivity of the flow rate control device can be increased compared with the case where a certain differential pressure is added.
Responsiveness to disturbances because the margin until fully closed / fully opened increases
You can increase the yield strength. Further, the fluctuation amount of the gas pressure generated by the movement of the gas turbine governor valve with respect to the load change can be canceled by the pressure correction term.
【００２２】そして上記５）のように制御すると、昇圧
機のＱ／Ｈ特性の傾斜の急な低負荷帯ではループゲイン
を下げることによってゲイン余裕の減少を防止すること
ができる。By controlling as in the above 5), it is possible to prevent the gain margin from decreasing by lowering the loop gain in the low load zone where the Q / H characteristic of the booster has a steep slope.
【００２３】更に上記６）のように制御すると、昇圧機
のサージマージンを常にある程度以上確保することがで
きる。Further, if the control is carried out as in the above 6), the surge margin of the booster can always be secured to some extent or more.
【００２４】加えて上記７）のように制御すると上記
１）ないし４）の空気圧力制御の精度を向上させること
ができる。In addition, if the control is performed as in 7) above, the accuracy of the air pressure control in 1) through 4) above can be improved.
【００２５】[0025]
【発明の実施の形態】次に本発明の実施の形態を図面に
よって説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【００２６】まず図１に示す空気・ガス系制御について
説明する。ガスタービン出力偏差信号（１）およびガス
化炉圧力偏差（２）を比例制御した信号（３）、（５）
および比例積分制御した信号（４）、（６）を、ガスタ
ービン出力指令（７）の関数として定まる信号（８）、
（９）にそれぞれ加減算し、ガスタービンガバナ弁開度
指令（１０）およびガス化炉入力要求（１１）として、
燃料、空気、スプレイ先行制御を行なう。また、ガスタ
ービンデマンドの関数として定まるガス化炉圧力設定
（１２）を２次空気流量指令信号（１３）の関数および
１次空気流量指令信号（１４）の関数に加算して、それ
ぞれの昇圧機の吐出圧力信号（１５）、（１６）と比較
し（１７）、（１８）、比例・積分を行なった信号をそ
れぞれの昇圧機の入口案内ベーン開度を操作する信号
（１７′）、（１８′）とする。First, the air / gas system control shown in FIG. 1 will be described. Gas turbine output deviation signal (1) and gasifier pressure deviation (2) proportional control signals (3), (5)
And the signals (4) and (6) which are controlled by proportional-plus-integral control as a function of the gas turbine output command (7) (8),
Addition / subtraction to (9), respectively, as a gas turbine governor valve opening command (10) and gasifier input request (11),
Fuel, air, spray advance control is performed. Further, the gasifier pressure setting (12) determined as a function of the gas turbine demand is added to the function of the secondary air flow rate command signal (13) and the function of the primary air flow rate command signal (14), and each booster is added. The discharge pressure signals (15) and (16) are compared (17) and (18), and the proportional and integrated signals are used to operate the inlet guide vane opening of each booster (17 '), ( 18 ').
【００２７】次に図２に２次空気昇圧機制御を纏めて示
すと、図１に述べた２次空気昇圧機入口案内ベーン開度
制御に加えて、ガスタービン負荷指令（１９）のゲイン
スケジュール関数を２次空気昇圧機吐出圧力偏差信号に
乗ずることによるゲイン補正機能と、２次空気昇圧機吐
出圧力（１５）と吸込圧力（２１）との比すなわち圧縮
比（２２）の関数としてのサージ流量（２３）と２次空
気昇圧機吸込流量（２４）の差信号（２５）の関数の時
間遅れ信号によって、２次空気昇圧機再循環ベーン開度
を操作する（２７）機能とを付加することになる。１次
空気に関してもほぼ同様である。Next, FIG. 2 shows a summary of the secondary air booster control. In addition to the secondary air booster inlet guide vane opening control described in FIG. 1, the gain schedule of the gas turbine load command (19) is shown. Gain correction function by multiplying the function by the secondary air booster discharge pressure deviation signal, and surge as a function of the ratio of the secondary air booster discharge pressure (15) to the suction pressure (21), that is, the compression ratio (22). A function (27) for operating the secondary air booster recirculation vane opening is added by a time delay signal as a function of a difference signal (25) between the flow rate (23) and the secondary air booster suction flow rate (24). It will be. The same applies to the primary air.
【００２８】これらの制御機能の基本構成を纏めて表現
したものが図３である。FIG. 3 collectively shows the basic configuration of these control functions.
【００２９】本実施形態の基本的原理は、ガス化炉圧力
の変動を最小限に抑制するために、下流側のガスタービ
ンガバナ弁開度指令およびガス化炉入力指令に対して、
適切なガスタービン出力偏差修正および圧力偏差修正を
追加するとともに、ガス化炉に空気を送る昇圧機の吐出
圧力の設定に際して、空気流量変化によって変わる昇圧
機からガス化炉までの圧損分だけ上乗せするような設定
値制御を行なって、昇圧機入口案内ベーン開度を操作す
るものである。更に、この昇圧機による空気系の圧力制
御機能の安定性と信頼性を補助する手段として、第１に
昇圧機吐出圧力制御器のゲインをガスタービン負荷指令
の関数として定めて低負荷ほど小さく設定し、第２に圧
縮比の関数として定まるサージングライン以上の吸込流
量を確保するように再循環弁の開度を自動調節するもの
である。The basic principle of this embodiment is that in order to minimize fluctuations in the gasifier pressure, the gas turbine governor valve opening command on the downstream side and the gasifier input command are
Appropriate gas turbine output deviation correction and pressure deviation correction are added, and when setting the discharge pressure of the booster that sends air to the gasifier, add only the pressure loss from the booster to the gasifier that changes depending on the air flow rate change. By performing such set value control, the opening of the booster inlet guide vane is operated. Further, as a means for assisting the stability and reliability of the pressure control function of the air system by the booster, firstly, the gain of the booster discharge pressure controller is determined as a function of the gas turbine load command and set to be smaller as the load is lower. Secondly, the opening of the recirculation valve is automatically adjusted so as to secure a suction flow rate equal to or higher than the surging line determined as a function of the compression ratio.
【００３０】[0030]
【発明の効果】本発明においては、負荷要求指令に対し
てガスタービンに出された出力要求に応じて操作される
ガスタービンガバナ弁および空気供給系により外乱を与
えられるガス化炉圧力系に対して、空気流調弁裕度向上
と制御器の感度向上およびガバナ弁による圧力偏差修正
等の作用により、外乱による圧力の変動を小さく抑える
効果がある。また上記の効果によって、派生的にガス化
炉の燃焼状況にも好影響を与え、燃焼およびガス化特性
を安定化させる効果がある。According to the present invention, the gas turbine governor valve operated according to the output demand issued to the gas turbine in response to the load demand command and the gasifier pressure system disturbed by the air supply system are provided. As a result, the fluctuation of the pressure due to the disturbance can be suppressed to be small by the action of improving the air flow control valve margin, improving the sensitivity of the controller and correcting the pressure deviation by the governor valve. In addition, the above-mentioned effect has a derivative effect on the combustion state of the gasification furnace and stabilizes the combustion and gasification characteristics.
【００３１】更に、空気供給弁開度の変化を小さく抑え
るように昇圧機吐出圧力を制御することができ、負荷変
動に対しても空気供給弁に過剰な絞りを加えることがな
いから、絞り損失を低減でき、また部分負荷での流量制
御性を確保しつつ吐出圧力が過大とならないので、補機
動力を削減することができる。この点は、ガス化炉圧力
に一定値を上乗せして吐出圧力設定を行なう方式よりも
すぐれている特徴的な効果である。Further, the booster discharge pressure can be controlled so as to suppress the change in the opening of the air supply valve to a small extent, and an excessive throttling is not applied to the air supply valve even when the load changes, so that the throttling loss And the discharge pressure does not become excessive while ensuring the flow rate controllability under partial load, so that the auxiliary machine power can be reduced. This is a characteristic effect that is superior to the method of setting the discharge pressure by adding a constant value to the gasifier pressure.
【００３２】本発明ではまた、どの負荷帯においても昇
圧機吐出圧力制御の安定性が増し、ハンチングを防止で
きる。そして、どの負荷帯においても昇圧機のサージン
グ発生を抑制でき、昇圧機制御の信頼性が増す。加えて
昇圧機制御の精度が向上し、信頼性が増す。Further, in the present invention, the stability of the booster discharge pressure control is increased in any load zone, and hunting can be prevented. Then, the surging of the booster can be suppressed in any load zone, and the reliability of the booster control is increased. In addition, the accuracy of booster control is improved and reliability is increased.
【図１】図１は本発明の実施の一形態に係る空気・ガス
系圧力制御装置を示す制御フロー図である。FIG. 1 is a control flow chart showing an air / gas system pressure control device according to an embodiment of the present invention.
【図２】図２は上記実施形態における２次空気昇圧機制
御装置を示す制御フロー図である。FIG. 2 is a control flow diagram showing a secondary air booster control device in the above embodiment.
【図３】図３は上記実施形態の圧力制御基本構成を示す
制御フロー図である。FIG. 3 is a control flow chart showing a basic configuration of pressure control of the above embodiment.
【図４】図４は石炭ガス化複合発電プラントの一例を示
す概要図である。FIG. 4 is a schematic diagram showing an example of an integrated coal gasification combined cycle power plant.
【図５】図５は従来の石炭ガス化炉圧力制御方式の一例
を示す制御フロー図である。FIG. 5 is a control flow chart showing an example of a conventional coal gasifier pressure control system.
（１００） ガス化炉設備 （１０１） ガス化炉 （１０２） ガス冷却器 （１０３） チャー回収系 （１１０） 脱塵設備 （１２０） 脱硫設備 （１３０） ガスタービン入口弁 （１３１） ガスタービン燃焼器 （１３２） ガスタービン （１３３） 発電機 （１３４） 空気圧縮機 （１４０） 排熱回収ボイラ （１５０） 蒸気タービン （１５１） 発電機 （161)、(162) 空気昇圧機 （１６３） 空気供給弁 （１７０） 石炭供給装置 (100) Gasification furnace equipment (101) Gasification furnace (102) Gas cooler (103) Char recovery system (110) Dust removal equipment (120) Desulfurization equipment (130) Gas turbine inlet valve (131) Gas turbine combustor (132) Gas turbine (133) Generator (134) Air compressor (140) Exhaust heat recovery boiler (150) Steam turbine (151) Generator (161), (162) Air booster (163) Air supply valve ( 170) Coal supply device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｎ 1/02 １０１ Ｆ２３Ｎ 1/02 １０１ Ｇ０５Ｄ 16/20 Ｇ０５Ｄ 16/20 Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location F23N 1/02 101 F23N 1/02 101 G05D 16/20 G05D 16/20 A
Claims (7)
ス化炉と、そのガス化炉で発生したガスを燃焼させて発
電するガスタービンと、そのガスタービンと同軸結合さ
れた空気圧縮機と、その空気圧縮機の抽気を昇圧して上
記ガス化炉へ送給する昇圧機とを備え、ガスタービンデ
マンドの関数としてガス化炉圧力設定を構成し、ガスタ
ービンガバナ弁開度指令およびガス化炉入力デマンドに
よる負荷制御およびガス化炉圧力制御に対してガスター
ビン出力偏差の修正とともにガス化炉圧力偏差の修正を
行なう協調制御装置において、空気供給弁とガスタービ
ンガバナ弁を制御するとともに上記昇圧機の吐出圧力を
制御する手段を備え、その設定値を、ガス化炉圧力設定
に対してガス化炉へ供給される空気量により定まる圧損
分を上乗せして設定し、上記昇圧機吐出圧力制御手段の
調節によって昇圧機の吐出圧力を制御することを特徴と
するガス化プラントの圧力制御装置。1. A gasification furnace for gasifying a solid fuel or a liquid fuel, a gas turbine for combusting gas generated in the gasification furnace to generate electricity, and an air compressor coaxially connected to the gas turbine. The gas compressor is provided with a booster for boosting the bleed air of the air compressor and feeding it to the gasification furnace, and the gasification furnace pressure setting is configured as a function of the gas turbine demand. The gas turbine governor valve opening command and the gasification furnace are provided. In a coordinated control device for correcting gas turbine output deviation as well as gasifier pressure deviation for load control and gasifier pressure control by input demand, in the booster, controlling an air supply valve and a gas turbine governor valve. Equipped with a means to control the discharge pressure of, and set the set value by adding the pressure loss amount determined by the amount of air supplied to the gasifier to the gasifier pressure setting Then, the pressure control device of the gasification plant is characterized in that the discharge pressure of the booster is controlled by adjusting the booster discharge pressure control means.
圧機の入口案内ベーンを用いることを特徴とする請求項
１記載のガス化プラントの圧力制御装置。2. The pressure control device for a gasification plant according to claim 1, wherein an inlet guide vane of the booster is used as the discharge pressure control means of the booster.
圧機の回転数制御を用いることを特徴とする請求項１記
載のガス化プラントの圧力制御装置。3. The pressure control device for a gasification plant according to claim 1, wherein the control of the number of revolutions of the booster is used as the discharge pressure control means of the booster.
圧機上流に設置した入口弁を用いることを特徴とする請
求項１記載のガス化プラントの圧力制御装置。4. The pressure control device for a gasification plant according to claim 1, wherein an inlet valve installed upstream of the booster is used as the discharge pressure control means of the booster.
制御器のゲインを定め、低負荷ほど小さく設定すること
を特徴とする請求項１記載のガス化プラントの圧力制御
装置。5. The pressure control device for a gasification plant according to claim 1, wherein the gain of the controller is determined as a function of the gas turbine load command and is set to be smaller as the load is lower.
サージングライン以上の吸込流量を確保するように、再
循環弁の開度を自動調節することを特徴とする請求項１
記載のガス化プラントの圧力制御装置。6. The opening degree of the recirculation valve is automatically adjusted so as to secure a suction flow rate equal to or higher than a surging line determined as a function of a compression ratio of the booster.
A pressure control device for the gasification plant described.
ることを特徴とする請求項１記載のガス化プラントの圧
力制御装置。 ΔＰ＝Ｋ（Ｐｏ／Ｐ）（Ｔ／Ｔｏ）Ｗ2 ここに Ｋ：定格点での流調弁Ｃｖ値および配管等の圧
損抵抗から定まる係数 Ｐｏ、Ｔｏ：定格点での圧力、温度 Ｐ、Ｔ ：運転状態での圧力、温度 Ｗ ：空気流量7. The pressure control device of a gasification plant according to claim 1, wherein the pressure loss component ΔP to be added is determined by the following equation. ΔP = K (Po / P) (T / To) W 2 Here, K is a coefficient determined from the flow control valve Cv value at the rated point and the pressure loss resistance of the pipe, etc. Po, To: Pressure at the rated point, temperature P, T: Pressure and temperature in operating state W: Air flow rate
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25633295A JP3716014B2 (en) | 1995-10-03 | 1995-10-03 | Pressure control equipment for gasification plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25633295A JP3716014B2 (en) | 1995-10-03 | 1995-10-03 | Pressure control equipment for gasification plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0996227A true JPH0996227A (en) | 1997-04-08 |
| JP3716014B2 JP3716014B2 (en) | 2005-11-16 |
Family
ID=17291210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25633295A Expired - Fee Related JP3716014B2 (en) | 1995-10-03 | 1995-10-03 | Pressure control equipment for gasification plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3716014B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056781A1 (en) * | 2006-11-09 | 2008-05-15 | Mitsubishi Heavy Industries, Ltd. | Goal gasification composite power generating system, and its running control method |
| US7797921B2 (en) | 2004-10-20 | 2010-09-21 | Mitsubishi Heavy Industries, Ltd. | Control apparatus of extracted air booster system of integrated gasification combined cycle power plant |
| US7827793B2 (en) | 2007-03-30 | 2010-11-09 | The Tokyo Electric Power Company, Incorporated | Power generation system |
| JP2011219524A (en) * | 2010-04-05 | 2011-11-04 | Mitsubishi Heavy Ind Ltd | Boiler facility |
| KR20180019295A (en) * | 2016-08-16 | 2018-02-26 | 한국서부발전 주식회사 | Control System for Integrated Gasification Combined Cycle Facility |
| CN114507550A (en) * | 2022-02-23 | 2022-05-17 | 新奥科技发展有限公司 | Pressure control system of pressure changing device |
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| CN111963323B (en) * | 2020-07-29 | 2022-08-02 | 东方电气自动控制工程有限公司 | Fuel control method in gas turbine speed-up process |
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1995
- 1995-10-03 JP JP25633295A patent/JP3716014B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7797921B2 (en) | 2004-10-20 | 2010-09-21 | Mitsubishi Heavy Industries, Ltd. | Control apparatus of extracted air booster system of integrated gasification combined cycle power plant |
| WO2008056781A1 (en) * | 2006-11-09 | 2008-05-15 | Mitsubishi Heavy Industries, Ltd. | Goal gasification composite power generating system, and its running control method |
| JP2008121450A (en) * | 2006-11-09 | 2008-05-29 | Mitsubishi Heavy Ind Ltd | Coal gasification composite power generating system, and its running control method |
| JP4745940B2 (en) * | 2006-11-09 | 2011-08-10 | 三菱重工業株式会社 | Coal gasification combined power generation system and operation control method thereof |
| US8408007B2 (en) | 2006-11-09 | 2013-04-02 | Mitsubishi Heavy Industries, Ltd. | Integrated gasification combined cycle and operation control method thereof |
| US7827793B2 (en) | 2007-03-30 | 2010-11-09 | The Tokyo Electric Power Company, Incorporated | Power generation system |
| JP2011219524A (en) * | 2010-04-05 | 2011-11-04 | Mitsubishi Heavy Ind Ltd | Boiler facility |
| KR20180019295A (en) * | 2016-08-16 | 2018-02-26 | 한국서부발전 주식회사 | Control System for Integrated Gasification Combined Cycle Facility |
| CN114507550A (en) * | 2022-02-23 | 2022-05-17 | 新奥科技发展有限公司 | Pressure control system of pressure changing device |
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| Publication number | Publication date |
|---|---|
| JP3716014B2 (en) | 2005-11-16 |
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