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font-size: 14px;">通風系統分類：安進回風巷在井田內位置不同，通風系統分為中央式、對角式、分區式和混合中央式：進回風井位于井田中央。根據進回風井沿傾斜方向的相對位置不同，可分為中心并列式和中心邊界式(中心行列式)。</span></p><p style="text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">對角式：進回風分別位于井田兩翼。兩翼對角式：進風井位于井田中央，回風井位于井田兩翼(沿傾斜方向淺部)，稱為兩翼對角式；進風井和回風井分別位于井田兩翼，稱為單翼對角式。對角式：進風井位于井田方向中心，每個采區均挖一個沒有主回風巷的小回風井。要求局部排風系統能根據各設備所需的局部排風量進行排風。</span></p><p style="text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">以往均勻吸氣管的設計采用主管等速設計法或減速梯形設計法，定量吸氣管采用合流三通阻力平衡法。這些方法在分析問題時過于粗糙，運行后風量偏差大，不能滿足人們對環境的要求。本文采用局部排風系統風道的設計方法，更詳細地分析了排風道內氣流的能量關系，可以進行更準確的計算。設備運行后的排風量與設計值偏差很小。</span></p><p style="text-align: center; text-indent: 2em;"><img src="/data/upload/201910/20191023173018_599.jpg" alt="通風加工白鐵管.jpg" width="397" height="259" border="0" vspace="0" title="通風加工白鐵管.jpg" style="width: 397px; height: 259px;"/></p><p><br/></p></div> <div class="xypg-detail-tags"> <div class="tags-title"> <h3>標簽</h3> <div class="baidu-share">  <div 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