JPH048088B2 - - Google Patents
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- Publication number
- JPH048088B2 JPH048088B2 JP61215974A JP21597486A JPH048088B2 JP H048088 B2 JPH048088 B2 JP H048088B2 JP 61215974 A JP61215974 A JP 61215974A JP 21597486 A JP21597486 A JP 21597486A JP H048088 B2 JPH048088 B2 JP H048088B2
- Authority
- JP
- Japan
- Prior art keywords
- denitrification
- plant
- temperature
- gas turbine
- exhaust
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/106—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/008—Adaptations for flue-gas purification in steam generators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ガスタービンと、上記ガスタービン
の排熱を回収して蒸気を発生させるボイラと、上
記の蒸気を用いて駆動される蒸気タービンと発電
気とを備えかつ、前記排熱回収ボイラ中に脱硝装
置を設けた複合発電プラントにおいて、排気中の
窒素酸化物（NOx）濃度を抑制するように制御
する装置に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a gas turbine, a boiler that recovers exhaust heat from the gas turbine to generate steam, and a steam turbine driven using the steam. The present invention relates to a device for controlling the concentration of nitrogen oxides (NO x ) in exhaust gas in a combined power generation plant including a denitrification device in the exhaust heat recovery boiler and a denitrification device in the exhaust heat recovery boiler.
従来の複合発電プラントの要的なNOx制御系
統図を第４図に示す。
Figure 4 shows the essential NO x control system diagram of a conventional combined cycle power plant.
空気取入室１を通して取り入れられた空気は空
気圧縮機４１で圧縮、昇温され、燃焼器４２で燃
料を助燃し高温高圧のガスとしてガスタービン４
３内で膨張し発電機４４および空気圧縮機４１を
駆動する。 The air taken in through the air intake chamber 1 is compressed and heated by an air compressor 41, and the combustor 42 burns fuel to generate high-temperature, high-pressure gas into the gas turbine 4.
3 and drives the generator 44 and air compressor 41.
ガスタービン４３からの排ガスは、排熱回収ボ
イラ４５で熱回収される。 Exhaust gas from the gas turbine 43 is heat-recovered by an exhaust heat recovery boiler 45.
排熱回収ボイラ４５は排ガスの上流から下流に
沿つて過熱器、前側高圧蒸発器、後側高圧蒸発
器、高圧節炭器、低圧蒸発器、低圧節炭器から構
成される。又、前側高圧蒸発器と後側高圧蒸発器
との間には、脱硝装置が設置されている。 The exhaust heat recovery boiler 45 includes a superheater, a front high-pressure evaporator, a rear high-pressure evaporator, a high-pressure energy saver, a low-pressure evaporator, and a low-pressure energy saver from the upstream to the downstream of the exhaust gas. Further, a denitrification device is installed between the front high-pressure evaporator and the rear high-pressure evaporator.
排熱回収ボイラ４４で発生した蒸気は蒸気ター
ビン４６に導入され、プラントの熱回収が図られ
る。 Steam generated in the exhaust heat recovery boiler 44 is introduced into the steam turbine 46 to recover heat from the plant.
これらの構成から成る複合発電プラントに於い
ても、近年、環境規制が年々強化させており、複
合発電プラントでも、前述のようにガスタービン
装置から排出される排ガスに含まれるNOx成分
を脱硝装置を介して大気放出することにより低減
している。 In recent years, environmental regulations have been tightened year by year for combined cycle power plants with these configurations, and as mentioned above, even in combined cycle power plants, denitrification equipment is used to remove NO x components contained in the exhaust gas discharged from the gas turbine equipment. It is reduced by releasing it into the atmosphere through.
第５図にガスタービン装置を通常起動させた場
合のプラント排ガス特性の一例を示す。 FIG. 5 shows an example of plant exhaust gas characteristics when the gas turbine device is normally started.
本第５図のＡ，Ｂ，Ｃは横軸（時間軸）を共用
し、Ａの縦軸はガスタービン負荷率を、Ｂの縦軸
は排ガス温度及び脱硝装置入口温度をＣの縦軸は
脱硝効率及びNOx量を、それぞれ表わしている。
プラントの排出NOx値は定格負荷で安定するま
での過程で最大値を呈する
（第５図Ｃの１点鎖線カーブ参照）。これは、
現在脱硝方式の一つとして採用されているアンモ
ニア接触還元分解法の基本反応式が、
4NO＋4NH3＋O2→4N2＋6H2O
6NO2＋8NH3→7N2＋12H2O
であり、この反応温度は、高効率の脱硝性能を得
る為には250℃〜400℃の範囲、最低でも200℃を
必要とすることによるものである。 A, B, and C in this Figure 5 share the horizontal axis (time axis), the vertical axis of A is the gas turbine load factor, the vertical axis of B is the exhaust gas temperature and the denitrification equipment inlet temperature, and the vertical axis of C is the horizontal axis (time axis). Denitrification efficiency and NOx amount are shown respectively.
The plant's exhaust NO x value reaches its maximum value until it stabilizes at the rated load (see the dash-dotted line curve in Figure 5C). this is,
The basic reaction formula of the ammonia catalytic reduction decomposition method currently adopted as one of the denitrification methods is 4NO + 4NH 3 +O 2 →4N 2 +6H 2 O 6NO 2 +8NH 3 →7N 2 +12H 2 O, and the reaction temperature is: This is because in order to obtain highly efficient denitrification performance, a temperature in the range of 250°C to 400°C, and at least 200°C is required.
第６図に脱硝反応温度と脱硝効率の関係を示
す。 Figure 6 shows the relationship between denitrification reaction temperature and denitrification efficiency.
従つて、従来方式では第５図に示す如く最終的
にはプラント排出NOx値を低減できるが、プラ
ント起動時におけるプラント排出NOx値は低減
できないという問題が存在する。これは、ガスタ
ービン装置から排出される排ガスの温度に対し、
第７図に示す如く排ガスは過熱器、前側高圧蒸発
器を通過する際温度降下を生じて低温度となり、
脱硝装置の昇温率が小さく、脱硝効率が低くなる
為である。 Therefore, in the conventional method, as shown in FIG. 5, although it is possible to ultimately reduce the plant exhaust NO x value, there is a problem in that the plant exhaust NO x value at the time of plant startup cannot be reduced. This is based on the temperature of the exhaust gas discharged from the gas turbine equipment.
As shown in Fig. 7, when the exhaust gas passes through the superheater and the front high-pressure evaporator, the temperature drops and becomes low temperature.
This is because the temperature increase rate of the denitrification equipment is small and the denitrification efficiency is low.
前述の従来方式に対して、特開昭61−28704で
は、プラント起動前に高圧ドラム残圧を高く保持
し、脱硝装置の雰囲気温度を高く保持し、プラン
ト起動後の脱硝効率の早期立上をすることによ
り、起動時のNOx値抵減を図つている。 In contrast to the conventional method described above, in JP-A-61-28704, the residual pressure of the high-pressure drum is maintained high before the plant is started, the atmospheric temperature of the denitrification equipment is maintained high, and the denitrification efficiency is increased quickly after the plant is started. By doing so, we aim to reduce the NO x value at startup.
しかし、上記特開昭61−28704の発明は、ホツ
トスタートでは有効であるが、ウオームスター
ト、コールドスタート時には、高圧ドラム残圧が
低くなつてしまい有効とはいえない。又、部分負
荷時には、脱硝装置入口排ガス温度が低くなり高
効率の脱硝性能が発揮できない等の問題があり、
昨今の環境規制の厳しい状況を踏まえると、プラ
ント排出NOx値低減は充分とはいえなかつた。 However, although the invention of JP-A No. 61-28704 is effective at hot start, it is not effective at warm start or cold start because the high pressure drum residual pressure becomes low. Additionally, during partial load, the temperature of the exhaust gas at the inlet of the denitrification equipment becomes low, causing problems such as the inability to achieve highly efficient denitrification performance.
Considering the recent strict environmental regulations, the reduction in NOx levels emitted from the plant could not be said to be sufficient.
尚、前記公知技術特開昭61−28704の発明を適
用した時の複合発電プラントのNOx動特性を第
８図に示す。本第８図のＡ，Ｂ，Ｃは、それぞれ
横軸に同一目盛で時間をとり、Ａの縦軸は脱硝装
置入口ガス温度をＢの縦軸は脱硝装置出、入口の
窒素酸化物濃度をＣの縦軸はガスタービンの回転
数及び負荷率を、それぞれ表わしている。 Incidentally, FIG. 8 shows the NO x dynamic characteristics of a combined power generation plant to which the invention of the above-mentioned known technology JP-A-61-28704 is applied. A, B, and C in this Figure 8 each have time on the same scale on the horizontal axis, and the vertical axis of A represents the gas temperature at the inlet of the denitrification equipment, and the vertical axis of B represents the nitrogen oxide concentration at the exit and inlet of the denitrification equipment. The vertical axis of C represents the rotation speed and load factor of the gas turbine, respectively.
上記従来技術は、複数発電プラントのウオーム
スタート、コールドスタート時に於ける起動時
NOx値低減並びに部分負荷時のNOx値低減に関
しては配慮されておらず、昨今の環境規制の厳し
い状況を踏まえると、プラント排出NOx低減は
充分とはいえないという問題があつた。
The above conventional technology is suitable for startup during warm start and cold start of multiple power generation plants.
No consideration was given to NO x value reduction or NO x value reduction at partial load, and there was a problem that the reduction of plant exhaust NO x was not sufficient in light of the recent strict environmental regulations.
本発明の目的は、複合発電プラントの各起動モ
ード（ホツトスタート、ウオームスタート、コー
ルドスタート）時並びに部分負荷時に於いて、プ
ラントから排出されるNOx値を有効し低減をし
得る複合発電プラントの窒素酸化物濃度制御装置
を提供することにある。 It is an object of the present invention to provide a combined cycle power generation plant that can effectively and reduce the NO An object of the present invention is to provide a nitrogen oxide concentration control device.
上記の目的を達成するために創作した本発明の
基本的原理について略述すると次の如くである。
The basic principle of the present invention, created to achieve the above object, is briefly described below.
すなわち、上記目的は、複合発電プラントに於
いて、ガスタービンの出口NOx値並びに圧縮機
出口空気温度に大きく影響を与えるガスタービン
の圧縮機入口空気温度を最適値に制御すること、
及びガスタービンの圧縮機出口空気を抽気して、
これをアンモニア希釈空気として使用し、脱硝反
応温度を最適に制御することにより、達成され
る。 That is, the above purpose is to control the gas turbine compressor inlet air temperature, which greatly affects the gas turbine outlet NOx value and the compressor outlet air temperature, to an optimal value in a combined cycle power plant;
and extracting air from the compressor outlet of the gas turbine,
This is achieved by using this air as ammonia dilution air and optimally controlling the denitrification reaction temperature.
上述の原理に基づいて、本発明に係る制御装置
は、ガスタービンと上記ガスタービンの排熱を回
収して蒸気を発生させるボイラと、上記の蒸気を
用いて駆動される蒸気タービンと発電気とを備
え、かつ、前記排熱回収ボイラ中に脱硝装置を設
けた複合発電プラントにおいて、前記発電プラン
トの起動指令に基づいて、前記ガスタービン用空
気圧縮機の入口空気温度及び前記脱硝装置のアン
モニア希釈空気流量を制御する装置を設け、か
つ、前記の制御装置は脱硝反応温度を制御すると
ともにプラント排出NOx濃度を低減する為のプ
ログラムを組み込んだものであることを特徴とす
る。 Based on the above-mentioned principle, the control device according to the present invention includes a gas turbine, a boiler that generates steam by recovering exhaust heat of the gas turbine, a steam turbine driven using the steam, and a power generation system. In a combined power generation plant comprising a denitrification device in the exhaust heat recovery boiler, the inlet air temperature of the gas turbine air compressor and the ammonia dilution of the denitrification device are adjusted based on a startup command of the power generation plant. The present invention is characterized in that a device for controlling the air flow rate is provided, and the control device incorporates a program for controlling the denitrification reaction temperature and reducing the NOx concentration of the plant exhaust.
各モードのプラント起動（ホツド、ウオーム、
コールド各起動モード）時に於いては、ガスター
ビンから導かれた排ガスは過熱器、高圧蒸発器を
通過する際温度降下を生じて低温度となり、脱硝
装置の昇温率が小さい為、このままでは脱硝反応
温度が低く脱硝効率が低い。
Plant startup in each mode (Hot, Warm,
During cold startup mode), the exhaust gas led from the gas turbine causes a temperature drop as it passes through the superheater and high-pressure evaporator, resulting in a low temperature, and since the rate of temperature increase in the denitrification equipment is small, denitrification will continue as it is. Reaction temperature is low and denitrification efficiency is low.
しかし、圧縮機出口空気は、回転数上昇並びに
負荷上昇に即応して温度が上昇する為この圧縮機
出口の高温空気を使用し、圧縮機出口空気温度が
規定値に到達以降、前記の構成の装置によれば圧
縮機出口空気をアンモニア希釈空気として使用し
脱硝反応温度を高めることにより、脱硝効率が上
がり複合発電プラントの排出NOx値低減が図れ
る。 However, since the temperature of the compressor outlet air rises immediately in response to increases in rotational speed and load, the high temperature air at the compressor outlet is used, and after the compressor outlet air temperature reaches the specified value, the above configuration is used. According to the device, by using compressor outlet air as ammonia dilution air and raising the denitrification reaction temperature, the denitrification efficiency increases and the NO x value emitted from the combined cycle power plant can be reduced.
更にガスタービン着火以降、ガスタービンから
排出され排熱回収ボイラに導かれる排ガスの一部
を抽気して、ガスタービンの圧縮機入口空気温度
を高めることによつて、圧縮機出口空気温度を早
期に脱硝反応温度の適正値に近づけることが出来
る。 Furthermore, after the gas turbine ignites, a portion of the exhaust gas discharged from the gas turbine and led to the waste heat recovery boiler is extracted to raise the air temperature at the gas turbine compressor inlet, thereby increasing the compressor outlet air temperature at an early stage. The denitrification reaction temperature can be brought close to the appropriate value.
一方、ガスタービンの排出NOx濃度は、米国
文献イー・ピー・エー（Environmental
Protection Agency）によると次記(1)式によつて
表わされる。 On the other hand, gas turbine exhaust NO x concentration is
According to the Japanese Protection Agency, it is expressed by the following equation (1).
NOx＝NOxs・f(P)・
e19H・f(T) ……(1)
ここに、
NOxs：ISO状態に於ける排出窒素酸化物濃度
f(P)：燃焼器入口圧力による補正関数
Ｈ：絶対湿度
f(T)：大気温度による補正関数
(1)式により、排出NOx濃度は大気温度により
大きく影響を受けることがわかる。ここで(1)式に
より判明する大気温度をパラメータとする排約
NOx濃度と負荷割合との関係を第９図に示す。
第９図からも明らかなように、大気温度により排
出NOx濃度が大きく変わることがわかる。 NO x = NO xs・f (P)・ e 19H・f (T) ……(1) where, NO xs : Exhaust nitrogen oxide concentration in ISO condition f (P) : Correction by combustor inlet pressure Function H: Absolute humidity f (T) : Correction function based on atmospheric temperature From equation (1), it can be seen that the exhaust NO x concentration is greatly affected by atmospheric temperature. Here, the exclusion using the atmospheric temperature as a parameter determined by equation (1)
Figure 9 shows the relationship between NO x concentration and load ratio.
As is clear from Fig. 9, it can be seen that the exhaust NO x concentration changes greatly depending on the atmospheric temperature.
よつて、前述の圧縮機入口空気温度を高めるこ
とは、ガスタービンの排出NOx値を低減する効
果もある。 Therefore, increasing the compressor inlet air temperature described above also has the effect of reducing the gas turbine exhaust NO x value.
また、プラントの部分負荷時に於いては、第１
０図に示すような脱硝装置入口排ガス温度（気温
によつて変化する）が圧縮機出口空気温度を上回
る負荷割の範囲では圧縮機出口空気で脱硝反応温
度を制御し、その負荷割合以上の負荷帯では、排
ガス系に脱硝装置の加温を依存し、アンモニア希
釈空気もガスタービンの圧縮機出口空気から別系
統の希釈空気に切替えてプラント排出NOx値を
制御することにより、効率的なNOx値制御が可
能となる。 Also, during partial load of the plant, the first
As shown in Figure 0, in the load range where the exhaust gas temperature at the denitrification equipment inlet (which varies depending on the air temperature) exceeds the compressor outlet air temperature, the denitrification reaction temperature is controlled by the compressor outlet air, and the denitrification reaction temperature is controlled by the compressor outlet air. In the zone, heating of the denitrification equipment depends on the exhaust gas system, and the ammonia dilution air is also switched from the gas turbine compressor outlet air to dilution air in a separate system to control the plant exhaust NO x value. x value control becomes possible.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
第１図は、本発明に係る複合発電プラントの窒
素酸化物濃度制御装置の１実施例を組み込んだ
NOx制御系統図を示し、以下に本図の説明をす
る。 FIG. 1 shows an embodiment of the nitrogen oxide concentration control device for a combined power generation plant according to the present invention.
The NO x control system diagram is shown below, and this diagram is explained below.
第１図は、複合発電プラントの排出NOx濃度
を最小にする為に、窒素酸化物濃度制御装置を介
して、ガスタービンから排出される排ガス中の
NOx値を最小ならしめ、さらに、ガスタービン
の圧縮機出口空気の温度を脱硝反応温度の最適値
にする為の圧縮機入口空気温度制御、脱硝反応温
度を最適値にする為のアンモニア希釈空気（圧縮
機出口空気又は別系統の空気）流量制御を夫々行
なうように構成したものである。 Figure 1 shows that in order to minimize the exhaust NO x concentration of a combined cycle power plant, the nitrogen oxide concentration control device
Compressor inlet air temperature control to minimize the NO (Compressor outlet air or air from a separate system) The configuration is such that flow rate control is performed for each.
第２図には、窒素酸化物濃度制御装置内にプロ
グラムとして組み込まれる脱硝反応温度と回転数
並びに負荷割合の関係を示す。 FIG. 2 shows the relationship between the denitrification reaction temperature, the rotation speed, and the load ratio, which is incorporated as a program in the nitrogen oxide concentration control device.
又、第３図は、前記実施例の複合発電プラント
のNOx動特性を示す。本第３図Ａ，Ｂ，Ｃは、
それぞれ従来例における第８図Ａ，Ｂ，Ｃに対応
する図表である。 Further, FIG. 3 shows the NO x dynamic characteristics of the combined power generation plant of the above example. This figure 3 A, B, C is
These are charts corresponding to FIGS. 8A, B, and C in the conventional example, respectively.
本実施例によつて確認された特徴的な効果につ
いて次に述べる。 The characteristic effects confirmed by this example will be described below.
第１の特徴的効果は、第３図に示すように、圧
縮機入口空気温度上昇によるNOx値低減高価で
あり、起動過程（部分負荷過程含む）に於いて、
ガスタービン出口NOx値（脱硝装置入口NOx値）
が従来に比べ小さい点である。 The first characteristic effect, as shown in Fig. 3, is that the NOx value is reduced due to the increase in compressor inlet air temperature.
Gas turbine outlet NO x value (Denitrification equipment inlet NO x value)
is smaller than before.
第２の特徴的効果は、第３図に示すように、圧
縮機入口空気温度上昇並びに脱硝反応温度上昇に
よるNOx値低減高価であり、起動過程（部分負
荷過程含む）に於いて、プラント出口NOx値
（脱硝装置出口NOx値）が従来に比べ小さい点で
ある。 The second characteristic effect, as shown in Fig. 3, is that the NO The NO x value (NO x value at the outlet of the denitrification equipment) is smaller than conventional products.
本発明によれば、複合発電プラントの各起動モ
ード（ホツト、ウオーム、コールドスタート）時
及び部分負荷時に於いて、プラントより排出され
るNOx値が従来に比べ約30％低減できるという
優れた実用的効果がある。
According to the present invention, the NO x value emitted from the plant can be reduced by approximately 30% compared to the conventional method in each startup mode (hot, warm, cold start) and at partial load of a combined cycle power plant. It has a positive effect.
又、圧縮機入口空気温度を設計最高空気温度に
制御する為、第１１図に示す如くプラント効率
も、性能計画点に対し約１％良くなるという効果
がある。 Furthermore, since the compressor inlet air temperature is controlled to the design maximum air temperature, the plant efficiency is also improved by about 1% relative to the performance plan point, as shown in FIG. 11.
第１図は、本発明に係る複合発電プラントの窒
素酸化物濃度制御装置の一実施例を組み込んだ概
要的なNOx制御系統図、第２図は、窒素酸化物
濃度制御装置内にプログラムとして組み込まれる
脱硝反応温度と回転数並びに負荷割合の関係を示
す図表、第３図は本発明を適用した実施例におけ
る複合発電プラントのNOx動特性、第４図は、
従来の複合発電プラントの概要的なNOx制御系
統図、第５図は従来の複合発電プラントの排ガス
特性表、第６図は、脱硝反応温度と脱硝効率の関
係を示す図表、第７図は、排熱回収ボイラの排熱
回収特性を示す図表、第８図は特開昭61−28704
の発明を複合発電プラントに適用した時のNOx
動特性を示す図表、第９図は大気温度をパラメー
タとするガスタービン出口NOx濃度と負荷割合
との関係を示す図表、第１０図は、排熱回収ボイ
ラ入口排ガス温度、脱硝装置入口排ガス温度、ガ
スタービンの圧縮機出口空気温度と負荷割合との
関係を示す図表、第１１図は、複合発電プラント
の熱効率の大気温度特性を示す図表である。
１……空気取入室、３……熱交換器、１５……
アンモニア注入弁、２５……アンモニア注入ノズ
ル、４１……ガスタービン用の空気圧縮機、４２
……同じく燃焼器、４５……排熱回収ボイラ。
FIG. 1 is a schematic NO x control system diagram incorporating an embodiment of the nitrogen oxide concentration control device for a combined cycle power plant according to the present invention, and FIG. A chart showing the relationship between the incorporated denitrification reaction temperature, rotation speed, and load ratio, Figure 3 shows the NO x dynamic characteristics of a combined cycle power plant in an example to which the present invention is applied, and Figure 4 shows the
A general NO x control system diagram of a conventional combined cycle power plant, Figure 5 is a table of exhaust gas characteristics of a conventional combined cycle plant, Figure 6 is a chart showing the relationship between denitrification reaction temperature and denitrification efficiency, and Figure 7 is a diagram showing the relationship between denitrification reaction temperature and denitrification efficiency. , a diagram showing the exhaust heat recovery characteristics of an exhaust heat recovery boiler, Figure 8 is from JP-A-61-28704.
NO x when applying the invention to a combined cycle power plant
Figure 9 is a graph showing the relationship between the NOx concentration at the gas turbine outlet and the load ratio with atmospheric temperature as a parameter. Figure 10 is the graph showing the exhaust gas temperature at the exhaust heat recovery boiler inlet and the exhaust gas temperature at the denitrification equipment inlet. FIG. 11 is a chart showing the relationship between compressor outlet air temperature and load ratio of a gas turbine, and FIG. 11 is a chart showing atmospheric temperature characteristics of thermal efficiency of a combined power generation plant. 1... Air intake chamber, 3... Heat exchanger, 15...
Ammonia injection valve, 25...Ammonia injection nozzle, 41...Air compressor for gas turbine, 42
... Also a combustor, 45 ... Exhaust heat recovery boiler.
Claims (1)
回収して蒸気を発生させるボイラと、上記の蒸気
を用いて駆動される蒸気タービンと発電気とを備
え、かつ、前記排熱回収ボイラ中に脱硝装置を設
けた複合発電プラントにおいて、前記発電プラン
トの起動指令に基づいて、前記ガスタービン用空
気圧縮機の入口空気温度及び前記脱硝装置のアン
モニア希釈空気流量を制御する装置を設け、か
つ、前記の制御装置は脱硝反応温度を制御すると
ともにプラント排出NOx濃度を低減する為のプ
ログラムを組み込んだものであることを特徴とす
る複合発電プラントの窒素酸化物濃度制御装置。1 A gas turbine, a boiler that recovers exhaust heat of the gas turbine to generate steam, a steam turbine driven using the steam, and a power generator, and includes a denitrification system in the exhaust heat recovery boiler. A combined power generation plant equipped with the device is provided with a device for controlling the inlet air temperature of the gas turbine air compressor and the ammonia dilution air flow rate of the denitrification device based on a startup command of the power plant, and A nitrogen oxide concentration control device for a combined power generation plant, characterized in that the control device incorporates a program for controlling the denitrification reaction temperature and reducing the NO x concentration discharged from the plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215974A JPS6372324A (en) | 1986-09-16 | 1986-09-16 | Nitrogen oxide concentration control device for composite power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215974A JPS6372324A (en) | 1986-09-16 | 1986-09-16 | Nitrogen oxide concentration control device for composite power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6372324A JPS6372324A (en) | 1988-04-02 |
| JPH048088B2 true JPH048088B2 (en) | 1992-02-14 |
Family
ID=16681322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61215974A Granted JPS6372324A (en) | 1986-09-16 | 1986-09-16 | Nitrogen oxide concentration control device for composite power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6372324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2966906A1 (en) * | 2010-10-29 | 2012-05-04 | Gen Electric | HEAT RECOVERY VAPOR GENERATOR |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111330446B (en) * | 2020-03-27 | 2022-04-05 | 大连船舶重工集团有限公司 | Novel ship tail gas treatment system |
-
1986
- 1986-09-16 JP JP61215974A patent/JPS6372324A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2966906A1 (en) * | 2010-10-29 | 2012-05-04 | Gen Electric | HEAT RECOVERY VAPOR GENERATOR |
| US9359918B2 (en) | 2010-10-29 | 2016-06-07 | General Electric Company | Apparatus for reducing emissions and method of assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6372324A (en) | 1988-04-02 |
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