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北京溫塔熱力有限公司 21MW(14MW)燃氣熱水鍋爐節能項目
作者:佚名 文章來源:本站原創 點擊數:1387 更新時間:2015-1-16 16:42:13 【字體:



 

一、改造原理

 

  

該設備采用豐普低溫節能器技術,用熱管作為換熱元件,以水套管對流換熱的結構形式進行換熱(設備工作原理如上左圖所示),通過降低鍋爐的排煙溫度,回收煙氣中的熱量,預熱鍋爐回水,達到節能減排的目的;在正常的工作情況下,可以確保節能器不發生低溫腐蝕和積灰的問題。

 

二、運行工況表

 

2.1設計運行工況

21MW節能器設計運行工況表

序號

項目內容

單位

改造前工況

設計值

改造后

運行值

1

鍋爐的熱負荷

MW

21

2

計算煙氣流量

Nm3/h

--

25650

--

3

節能器的熱負荷

KW

--

785

680

575

470

365

575

4

設計進口煙氣溫度

--

200

180

160

140

120

165

5

設計出口煙氣溫度

165

120

110

100

92

83

105

 

14MW節能器設計運行工況表

序號

項目內容

單位

改造前工況

設計值

改造后

運行值

1

鍋爐的熱負荷

MW

14

2

計算煙氣流量

Nm3/h

--

17100

 --

3

節能器的熱負荷

KW

--

550

480

405

330

260

480

4

設計進口煙氣溫度

--

200

180

160

140

120

185

5

設計出口煙氣溫度

185

115

105

98

89

82

105-115

 

2.2產品熱效率測試

 

2.3實際運行DCS

   

四、經濟效益

 

節能量Q QV0 ×Cp×Δη÷3600

 

式中:V0為煙氣流量;

              Cp=1.37kj(Nm3.),為煙氣比熱;

           Δt,為改造前后排煙溫度差;

           η=0.97,為傳熱效率。

 

節標煤量△G

    △G=節能量×3.6÷天然氣熱值÷鍋爐效率×年運行時間

 

綜合年經濟效益

鍋爐熱

負荷

改造前

 

改造后

 

節能率

運行時間

節能量/

天然氣

節能效益

2.67/

 

鍋爐測試

效率

21MW

165

105

2.6%

2880小時

17萬方

45萬元

95.6%

14MW

185

110

3.3%

2880小時

14.2萬方

38萬元

94.07%

 

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