120t步進梁式加熱爐項的設計（機械cad圖紙）

1、本科機械畢業(yè)設計論文CAD圖紙QQ401339828目錄1設計依據(jù).........................................................................................................................52燃料燃燒計算..........................................................

2、.......................................................52.1煤氣干濕成分的換算...........................................................................................52.2煤氣低發(fā)熱值...................................................

3、....................................................62.3煤氣重度...............................................................................................................62.4空氣需要量........................................

4、...................................................................62.5燃燒產(chǎn)物生成量及成分.......................................................................................72.6燃燒產(chǎn)物重度..........................................

5、.............................................................83爐膛熱交換計算.............................................................................................................83.1確定爐膛有關尺寸.............................

6、..................................................................83.2求爐氣黑度...........................................................................................................93.3爐壁對金屬的角度系數(shù)........................

7、.............................................................113.4求導來輻射系數(shù)C.............................................................................................114金屬加熱計算............................................

8、...................................................................124.1金屬均熱段末（界面4）各有關參數(shù)..............................................................124.2金屬一加熱段末（界面3）各有關參數(shù)................................................

9、..........134.3金屬二加熱段末（界面2）各有關參數(shù)..........................................................154.4金屬預熱段末（界面1）各有關參數(shù)..............................................................154.5金屬預熱段開始（界面0）各有關參數(shù).........................

10、.................................184.6各段平均熱流及加熱時間.................................................................................185確定爐子的主要尺寸..............................................................................

11、.....................195.1爐子有效長度.....................................................................................................195.2有效爐底強度............................................................................

12、.........................206爐子熱平衡計算...........................................................................................................216.1熱收入項計算...................................................................

13、..................................216.2熱支出項計算.....................................................................................................227換熱器計算..................................................................

14、.................................................357.1計算依據(jù).............................................................................................................35本科機械畢業(yè)設計論文CAD圖紙QQ401339828項目設計3.1設計依據(jù)1、爐子生產(chǎn)率：G=120t

15、h2、加熱鋼種：普碳鋼，鋼坯尺寸：230mm1600mm4000mm的標準坯。3、燃料：(1)種類：高焦爐混合煤氣(2)低發(fā)熱量：213341.8=8916kJNm34、加熱參數(shù)：(1)板坯加熱初始溫度t=20℃(2)板坯加熱終了溫度t=1180℃(3)板坯加熱終了斷面溫差Δt≤30℃(4)空氣預熱溫度t=400℃(5)出爐煙氣溫度t=900℃3.2燃料燃燒計算按以上設計依據(jù)和設計方案進行如下熱工計算。高焦爐煤氣的體積成分如表3.1。表