【正文】 xpansion devices proposed pipeline system cooler, seal piping systems in the formulation, the formulation of the milling system, etc. Have identified the main auxiliary mill, coal feeder, blower, induced draft fan, to the powder, coarse separator, feed water pump and so on. This design only in the selection criteria in accordance with the safe and economic optimization does not take into account other factors. Keywords: steam turbine, boiler, heating system, auxiliary form 300MW 機組熱力部分局部初步設計 III 目 錄 中文摘要 ......................................................................................................................................I Abstract.......................................................................................................................................II 1. 原則性熱力系統的擬定計算 ................................................................................................1 給水回熱系統和除氧器系統的擬定 ......................................................................1 補水系統的擬定 ......................................................................................................1 鍋爐連續(xù)排污利用系數的擬定 ..............................................................................2 繪制原則性熱力系統圖 ..........................................................................................2 繪制汽輪機熱力過程線及汽水綜合參數表 ..........................................................2 回熱系統的計算 ......................................................................................................5 汽輪機總汽耗量及各項汽水流量計 算 .................................................................11 汽輪機功率核算 .....................................................................................................13 熱經濟指標計算 .....................................................................................................15 2. 汽機車間主要設備的確定 ....... ...........................................................................................18 凝汽器與軸封加熱器的選擇 …………………………………………………… ..18 給水泵的選擇 .........................................................................................................22 凝結水泵的選擇 .....................................................................................................22 除氧器及給水箱的選擇 .........................................................................................24 低壓加熱器的疏水泵的選擇 .................................................................................25 連續(xù)排污擴容器的選擇 .........................................................................................25 疏水擴容器的選擇 .................................................................................................26 疏水箱及疏水泵的選擇 .........................................................................................26 供水方式的確定和循環(huán)水泵的選擇 .....................................................................27 3. 鍋爐燃燒系統及其設備的選擇 ...........................................................................................29 燃燒系統的計算 .....................................................................................................29 制粉系統的選擇 .....................................................................................................32 磨煤機型式的選擇 .................................................................................................33 排粉機的選擇 .........................................................................................................34 粗粉分離器的選擇 .................................................................................................36 給煤機的選擇 .........................................................................................................36 送風機的選擇 .........................................................................................................37 引風機的選擇 .........................................................................................................39 4. 全面性熱力系統的擬定 .......................................................................................................40 主蒸汽管道系統的擬定 .........................................................................................40 再熱機組旁路系統的擬定 .....................................................................................43 給水管道系統的擬定 .............................................................................................45 回熱加熱器管道系統的擬定 .................................................................................46 除氧器管道系統的擬定 .........................................................................................47 沈陽工程學院畢業(yè)設計（論文） IV 補充水管道系統的擬定 .........................................................................................49 排污擴容器及排污冷卻器管道系統的擬定 .........................................................51 軸封管道系統的擬定 .............................................................................................52 真空及空氣管道系統的擬定 .................................................................................52 結論 .............................................................................................................................................55 致謝 .............................................................................................................................................56 參考資料 .....................................................................................................................................57 附圖 .............................................................................................................................................58 附圖 1 發(fā)電廠原則性熱力系統圖 ..............................................................................58 附圖 2 再熱機組旁路系統 ..........................................................................................59 附圖 3 300MW 單元制給水系統 .................................................................................. 60 附圖 4 回熱加熱系統圖 ..............................................