JP6986842B2 - 蒸気発電プラントを運転する方法およびこの方法を実施するための蒸気発電プラント - Google Patents
蒸気発電プラントを運転する方法およびこの方法を実施するための蒸気発電プラント Download PDFInfo
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Description
10a、b 蒸気発電プラント
11 高圧(HP)蒸気タービン
12 中間圧力(IP)蒸気タービン
13 低圧(LP)蒸気タービン
14 発電機
15 復水器
16 復水ポンプ
17 熱交換器
18 低圧加熱器(LPH)
19 給水タンク
20 給水ポンプ
21a、b 高圧加熱器(HPH)
22 過熱低減器(DeSH)
23 エコノマイザ(へ)
24 低温再熱(へ)
25 長寿命な蒸気(から)
26 高温再熱(から)
27 蒸気貯蔵タンク
27a 入力部(蒸気貯蔵タンク)
27b 出力部(蒸気貯蔵タンク)
28、30、32 弁
29、31、33、39 過熱(SH)オプション
34〜38、40 弁
E1〜E7 (蒸気の)抽気系
Claims (8)
- 蒸気発電プラント(10a,10b)を運転する方法であって、前記蒸気発電プラントが、
高圧(HP)蒸気タービン(11)、中間圧力(IP)蒸気タービン(12)及び低圧(LP)蒸気タービン(13)を有する主気水サイクルと、
復水器(15)と、
給水タンク(19)と
を備えており、
複数の低圧加熱器(18)が前記復水器(15)と前記給水タンク(19)の間に配置され、複数の高圧加熱器(21a,21b)が前記給水タンク(19)の下流に配置されており、
前記低圧加熱器(18)、前記給水タンク(19)及び前記複数の高圧加熱器(21a,21b)に、前記蒸気タービン(11,12,13)の複数の抽気系(E1〜E7)から蒸気が供給され、当該方法が、
a.蒸気貯蔵手段(27)を前記蒸気発電プラント(10a,10b)内に設けるステップと、
b.前記蒸気発電プラント(10a,10b)の第1の運転期間中、蒸気を前記蒸気貯蔵手段(27)に貯蔵するステップと、
c.前記蒸気タービン(11,12,13)の前記複数の抽気系(E1〜E7)から抽出される蒸気を節約するために、前記第1の運転期間中に前記蒸気貯蔵手段(27)に貯蔵された蒸気を、前記蒸気発電プラント(10a,10b)の第2の運転期間中に、前記主気水サイクルへ排出するステップと
を含み、
前記第1の運転期間中、前記高圧(HP)蒸気タービン(11)から抽出された蒸気が、前記蒸気貯蔵手段(27)に貯蔵され、前記複数の高圧加熱器(21a,21b)のうちの第1の高圧加熱器(21a)に、前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気が供給され、
前記蒸気発電プラント(10a,10b)の前記第2の運転期間中に、蒸気が前記蒸気貯蔵手段(27)から前記複数の高圧加熱器(21a,21b)のうちの前記第1の高圧加熱器(21a)内に排出され、かつ前記第2の運転期間中に前記蒸気貯蔵手段(27)から前記複数の高圧加熱器(21a,21b)のうちの前記第1の高圧加熱器(21a)内に排出された前記蒸気が、
前記高圧(HP)蒸気タービン(11)から抽出された蒸気、又は
前記中間圧力(IP)蒸気タービン(12)の入口で利用可能である高温再熱蒸気、又は
前記複数の高圧加熱器(21a,21b)のうちの前記第1の高圧加熱器(21a)に供給するために前記中間圧力(IP)蒸気タービン(12)から抽出される蒸気で
過熱される、方法。 - 蒸気発電プラント(10a,10b)を運転する方法であって、前記蒸気発電プラントが、
高圧(HP)蒸気タービン(11)、中間圧力(IP)蒸気タービン(12)及び低圧(LP)蒸気タービン(13)を有する主気水サイクルと、
復水器(15)と、
給水タンク(19)と
を備えており、
複数の低圧加熱器(18)が前記復水器(15)と前記給水タンク(19)の間に配置され、複数の高圧加熱器(21a,21b)が前記給水タンク(19)の下流に配置されており、
前記低圧加熱器(18)、前記給水タンク(19)及び前記複数の高圧加熱器(21a,21b)に、前記蒸気タービン(11,12,13)の複数の抽気系(E1〜E7)から蒸気が供給され、当該方法が、
a.蒸気貯蔵手段(27)を前記蒸気発電プラント(10a,10b)内に設けるステップと、
b.前記蒸気発電プラント(10a,10b)の第1の運転期間中、蒸気を前記蒸気貯蔵手段(27)に貯蔵するステップと、
c.前記蒸気タービン(11,12,13)の前記複数の抽気系(E1〜E7)から抽出される蒸気を節約するために、前記第1の運転期間中に前記蒸気貯蔵手段(27)に貯蔵された蒸気を、前記蒸気発電プラント(10a,10b)の第2の運転期間中に、前記主気水サイクルへ排出するステップと
を含み、
前記第1の運転期間中、前記高圧(HP)蒸気タービン(11)から抽出された蒸気が、前記蒸気貯蔵手段(27)に貯蔵され、前記給水タンク(19)に、前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気が供給され、前記蒸気発電プラント(10a,10b)の前記第2の運転期間中に、蒸気が前記蒸気貯蔵手段(27)から前記給水タンク(19)内に排出され、かつ前記蒸気貯蔵手段(27)から前記給水タンク(19)内に排出された前記蒸気が、
前記高圧(HP)蒸気タービン(11)から抽出された蒸気、又は
前記中間圧力(IP)蒸気タービン(12)の入口で利用可能である高温再熱蒸気、又は
前記給水タンク(19)に供給するために前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気で
過熱される、方法。 - 蒸気発電プラント(10a,10b)を運転する方法であって、前記蒸気発電プラントが、
高圧(HP)蒸気タービン(11)、中間圧力(IP)蒸気タービン(12)及び低圧(LP)蒸気タービン(13)を有する主気水サイクルと、
復水器(15)と、
給水タンク(19)と
を備えており、
複数の低圧加熱器(18)が前記復水器(15)と前記給水タンク(19)の間に配置され、複数の高圧加熱器(21a,21b)が前記給水タンク(19)の下流に配置されており、
前記低圧加熱器(18)、前記給水タンク(19)及び前記複数の高圧加熱器(21a,21b)に、前記蒸気タービン(11,12,13)の複数の抽気系(E1〜E7)から蒸気が供給され、当該方法が、
a.蒸気貯蔵手段(27)を前記蒸気発電プラント(10a,10b)内に設けるステップと、
b.前記蒸気発電プラント(10a,10b)の第1の運転期間中、蒸気を前記蒸気貯蔵手段(27)に貯蔵するステップと、
c.前記蒸気タービン(11,12,13)の前記複数の抽気系(E1〜E7)から抽出される蒸気を節約するために、前記第1の運転期間中に前記蒸気貯蔵手段(27)に貯蔵された蒸気を、前記蒸気発電プラント(10a,10b)の第2の運転期間中に、前記主気水サイクルへ排出するステップと
を含み、
前記第1の運転期間中、前記高圧(HP)蒸気タービン(11)から抽出された蒸気が、前記蒸気貯蔵手段(27)に貯蔵され、前記給水タンク(19)に、前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気が供給され、前記蒸気発電プラント(10a,10b)の前記第2の運転期間中に、蒸気が前記蒸気貯蔵手段(27)から前記給水タンク(19)内に排出され、かつ前記複数の高圧加熱器(21a,21b)のうちの第1の高圧加熱器(21a)に、前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気が供給され、前記蒸気貯蔵手段(27)から前記給水タンク(19)内に排出された前記蒸気が、前記複数の高圧加熱器(21a,21b)のうちの前記第1の高圧加熱器(21a)に供給するために前記中間圧力(IP)蒸気タービン(12)から抽出される蒸気で過熱される、方法。 - 前記蒸気貯蔵手段(27)が、蒸気貯蔵タンクである、請求項1乃至請求項3のいずれか1項に記載の方法。
- 請求項1乃至請求項4のいずれか1項に記載の方法を実施するための蒸気発電プラント(10a,10b)であって、当該蒸気発電プラント(10a,10b)が、
高圧蒸気タービン(11)、中間圧力蒸気タービン(12)及び低圧蒸気タービン(13)を有する気水サイクルと、
復水器(15)と、
給水タンク(19)と
を備えており、
低圧加熱器(18)が前記復水器(15)と前記給水タンク(19)の間に配置され、第1及び第2の高圧加熱器(21a,21b)が前記給水タンク(19)の下流に配置されており、前記低圧加熱器(18)、前記給水タンク(19)並びに前記第1及び第2の高圧加熱器(21a,21b)に、前記蒸気タービン(11,12,13)の複数の抽気系(E1〜E7)から蒸気が供給され、
蒸気を受け取るための入力部(27a)及び蒸気を排出するための出力部(27b)を有する蒸気貯蔵手段(27)が前記蒸気発電プラント(10a,10b)に設けられ、前記蒸気貯蔵手段(27)の前記入力部(27a)が前記高圧(HP)蒸気タービン(11)の蒸気抽気系(E7)に動作可能に接続され、前記蒸気貯蔵手段(27)の前記出力部(27b)が前記第1の高圧加熱器(21a)又は前記給水タンク(19)に動作可能に接続される、蒸気発電プラント(10a,10b)。 - 前記蒸気貯蔵手段(27)が、前記給水タンク(19)に動作可能に接続される、請求項5に記載の蒸気発電プラント(10a,10b)。
- 前記高圧(HP)蒸気タービン(11)から抽出された蒸気、又は前記中間圧力(IP)蒸気タービン(12)の入口で利用可能である高温再熱蒸気、又は前記複数の高圧加熱器(21a,21b)のうちの前記第1の高圧加熱器(21a)に供給するために前記中間圧力(IP)蒸気タービン(12)から抽出される蒸気で、前記蒸気貯蔵手段(27)から抽出された蒸気を過熱する手段が設けられている、請求項5又は請求項6に記載の蒸気発電プラント(10a,10b)。
- 前記給水タンク(19)に供給するために前記中間圧力(IP)蒸気タービン(12)から抽出された蒸気で前記蒸気貯蔵手段(27)から抽出された蒸気を過熱する手段が設けられている、請求項6に記載の蒸気発電プラント(10a,10b)。
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