例句與造句

1. 3 . on boiler retrofit , the calculation of fuel burning , the heat calculation of boiler inside structure and convection section , and the design of structure parameter of feed water heat exchanger are made . the flue gas channels " resistance calculation and the boiler strength verifying are also carried out . replacement of water cooling wall improves heat exchanging and decreases loss of heat radiant
   對鍋爐本體進(jìn)行了燃料燃燒計算、爐膛結(jié)構(gòu)熱力計算、對流受熱面結(jié)構(gòu)熱力計算、鍋爐給水加熱器結(jié)構(gòu)參數(shù)設(shè)計、煙道阻力計算及鍋爐元件強度校核等；改進(jìn)了水冷壁布置使換熱效果更好，減少輻射換熱損失；改進(jìn)對流段結(jié)構(gòu)，更充分的利用爐膛出口煙氣余熱，提高熱效率；并且進(jìn)行了煙氣阻力計算、熱效率計算和能量平衡測試，對改進(jìn)后的稠油燃料和改進(jìn)前進(jìn)行了對比，燃燒狀況和熱效率有明顯改善。
2. Abstract : the in servie tubular heaters built early in refineries and chemical plans have low thermal load and low heat efficiency , therefore measures for technical reform are offered , including ( 1 ) enlarging the surface area of convection tubes to increase the thermal load of rhe convection section ; ( 2 ) increasign the heat interchanging area of radiant tubes ; ( 3 ) changing the height of the chimney ; ( 4 ) using new burner with forced air supply to increase calorific capacityu ; ( 5 ) adding air preheater between the convection section and chimney to enhence the temperature of the air entering the furnace ; ( 6 ) adopting high temperature radiant coating to improve the effect of radiant heat interchanging
   文摘:針對早期建造的煉油廠和化工廠在役管式加熱爐熱負(fù)荷和熱效率低的狀況，提出了若干技術(shù)改造措施包括，增大對流管表面積以增大對流段的熱負(fù)荷；增加輻射管的換熱面積；修正煙囪高度；換用新型燃燒器，變自然通風(fēng)為強制供風(fēng)，以增大燃燒器的發(fā)熱量，減小過剩空氣系數(shù)，節(jié)省燃料2 % 3 % ；在對流段和煙囪之間增設(shè)空氣預(yù)熱器以提高空氣入爐溫度；采用高溫輻射涂料增強輻射換熱效果，從而增加熱源對爐壁的輻射傳熱量和爐管的傳熱量等。
3. The in servie tubular heaters built early in refineries and chemical plans have low thermal load and low heat efficiency , therefore measures for technical reform are offered , including ( 1 ) enlarging the surface area of convection tubes to increase the thermal load of rhe convection section ; ( 2 ) increasign the heat interchanging area of radiant tubes ; ( 3 ) changing the height of the chimney ; ( 4 ) using new burner with forced air supply to increase calorific capacityu ; ( 5 ) adding air preheater between the convection section and chimney to enhence the temperature of the air entering the furnace ; ( 6 ) adopting high temperature radiant coating to improve the effect of radiant heat interchanging
   針對早期建造的煉油廠和化工廠在役管式加熱爐熱負(fù)荷和熱效率低的狀況，提出了若干技術(shù)改造措施包括，增大對流管表面積以增大對流段的熱負(fù)荷；增加輻射管的換熱面積；修正煙囪高度；換用新型燃燒器，變自然通風(fēng)為強制供風(fēng)，以增大燃燒器的發(fā)熱量，減小過?？諝庀禂?shù)，節(jié)省燃料2 % 3 % ；在對流段和煙囪之間增設(shè)空氣預(yù)熱器以提高空氣入爐溫度；采用高溫輻射涂料增強輻射換熱效果，從而增加熱源對爐壁的輻射傳熱量和爐管的傳熱量等。
4. It's difficult to find convection section in a sentence. 用convection section造句挺難的