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style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">吸送式氣力輸送裝置采用羅茨風機或真空泵作為氣源設備，取料裝置部件多為吸嘴、誘導式接料器等。氣源設備位于系統的末端，當風機運轉后，整個系統形成負壓，由管道內外存在的壓力差空氣被吸入輸料管，與此同時物料和一部分空氣便一起被吸嘴吸入，并被輸送到分離器。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">壓氣式氣力輸送裝置有低壓壓送、高壓壓送、流態化壓送以及脈沖栓流式等各種類型。但是，氣源設備均在系統的進料端，因此必須采用密封的供料裝置。供料部件相對吸送式復雜。</span></p><h2><strong><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">2 氣力輸送的工藝計算</span></strong></h2><h2><strong><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">2.1 粉塵的懸浮速度</span></strong></h2><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">計算顆粒懸浮速度是計算所需空氣量的基礎：</span></p><p style="margin-top:21px;margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> <img src="uploadfile/2020/0310/20200310024500392.png"/><br/></span><span style="font-family: 微軟雅黑, " microsoft="" text-indent:=""> 式中 v</span><sub style="font-family: 微軟雅黑, " microsoft="" text-indent:=""><span style="vertical-align: sub; font-size: 16px;">0</span></sub><span style="font-family: 微軟雅黑, " microsoft="" text-indent:="">——球體的懸浮速度（m/s）</span></p><p style="text-indent:38px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> d<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">s</span></sub>——球體的直徑（m）</span></p><p style="text-indent:38px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> ρ<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">s</span></sub>——球體的密度（kg/m<sup><span style="vertical-align: super; font-size: 16px; font-family: 微軟雅黑, " microsoft="">3</span></sup>）</span></p><p style="text-indent:38px;line-height:29px"><span style="font-family: 微軟雅黑, " microsoft=""> ρ——空氣的密度（kg/m</span><sup style="font-family: 微軟雅黑, " microsoft=""><span style="vertical-align: super; font-size: 16px;">3</span></sup><span style="font-family: 微軟雅黑, " microsoft="">）</span></p><p style="text-indent:38px;line-height:29px"><span style="font-family: 微軟雅黑, " microsoft=""> C——阻力系數</span></p><p style="text-indent:38px;line-height:29px"><span style="font-family: 微軟雅黑, " microsoft=""> g——重力加速度，9.81m/s</span><sup style="font-family: 微軟雅黑, " microsoft=""><span style="vertical-align: super; font-size: 16px;">2</span></sup></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">由公式可知，較大和較重的物體所需的懸浮速度也就越大。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">公式中由于阻力系數C是雷諾數Re的函數，Re與懸浮速度有關，因此不能直接求得懸浮速度v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub>。因此，可將不同Re范圍下的Re=f(C)的函數，代入上述公式，間接求得不同Re范圍下的懸浮速度v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub>=f(Re)，再將Re=f(v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub>,d<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">s</span></sub>)函數代入，可以求得d<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">s</span></sub>與v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub>之間的對應關系。從而，根據d<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">s</span></sub>的大小，求得v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub>。</span></p><h3><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""><strong>2</strong><strong>.</strong><strong>2 輸送氣速</strong></span></h3><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">原則上，當氣流速度大于顆粒的懸浮速度時，顆粒就可以被輸送。但是，一般情況下要增加經驗系數來確定合適的輸送氣速v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">a</span></sub>，如表1所示。</span></p><p style="margin-bottom:10px;text-align:center;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">表1 輸送氣流速度的經驗系數</span></p><table cellspacing="0" width="897" align="center"><tbody><tr class="firstRow"><td valign="top" style="padding: 0px 7px; border-width: 1px; border-color: rgb(0, 0, 0); border-style: solid;" width="227"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">輸送物料情況</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="184"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">輸送氣流速度v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">a</span></sub></span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="296"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">輸送物料情況</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="189"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">輸送氣流速度va</span></p></td></tr><tr><td valign="top" style="padding: 0px 7px; border-width: 1px; border-color: rgb(0, 0, 0); border-style: solid;" width="227"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">松散物料在垂直管中</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="184"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (1.3~1.7) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="296"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">有二個彎管的垂直或傾斜管</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="189"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (2.4~4.0) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td></tr><tr><td valign="top" style="padding: 0px 7px; border-width: 1px; border-color: rgb(0, 0, 0); border-style: solid;" width="227"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">松散物料在傾斜管中</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="184"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (1.5~1.9) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="296"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">管路布置較復雜時</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="189"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (2.6~5.0) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td></tr><tr><td valign="top" style="padding: 0px 7px; border-width: 1px; border-color: rgb(0, 0, 0); border-style: solid;" width="227"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">松散物料在水平管中</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="184"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (1.8~2.0) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="296"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">大密度、成團的粘結性物料</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="189"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (5.0~10.0) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td></tr><tr><td valign="top" style="padding: 0px 7px; border-width: 1px; border-color: rgb(0, 0, 0); border-style: solid;" width="227"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">有一個彎管的上升管</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="184"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ 2.2 v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="296"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">細粉狀物料</span></p></td><td valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);" width="189"><p style=";line-height:27px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">≥ (50~100) v<sub><span style="vertical-align: sub; font-size: 16px; font-family: 微軟雅黑, " microsoft="">0</span></sub></span></p></td></tr></tbody></table><h3><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""><strong>2</strong><strong>.</strong><strong>3 輸送氣量和管徑</strong></span></h3><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">輸送空氣量則是根據物料的混合比m來計算的。在壓送式系統中，低壓時m為1~10，高壓時m為10~40，流態化壓送時m為40~80。例如，對于17kg/min的回轉閥，取m=1，則需要17 / 1 = 17kg/min的輸送空氣，約850m<sup><span style="vertical-align: super; font-size: 16px; font-family: 微軟雅黑, " microsoft="">3</span></sup>/h的空氣量。根據850m<sup><span style="vertical-align: super; font-size: 16px; font-family: 微軟雅黑, " microsoft="">3</span></sup>/h氣量和10m/s氣速，則可確定輸送管道內徑為170mm。</span></p><h3><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""><strong>2</strong><strong>.</strong><strong>4 輸送壓力</strong></span></h3><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">風機的輸送壓力需要克服管道壓損（無料段）、加壓損失、直管壓損、彎管壓損、除塵器等的設備壓損以及排氣管壓損，并留有至少20%的余量。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">詳細的計算過程參見好科科技的設計程序。</span></p><h3><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""><strong>2.5給料裝置</strong></span></h3><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">壓送是氣力輸送的給料裝置主要有：</span></p><p style="margin-bottom:10px;margin-left:118px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">1）向高速氣流中直接供料，如星型卸灰閥等。這種方式的混合比m=3~20，輸送壓力為0.02~0.05Mpa，輸送距離為20~60m，輸送量可達1~100t/h。</span></p><p style="margin-bottom:10px;margin-left:118px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">2）在混合室中將空氣與粉料混合成均勻的分散相，降低輸送阻力，如帶混合室的螺旋輸送機。這種方式的混合比m=10~30，輸送壓力為0.05~0.1Mpa，輸送距離為20~30m，輸送量5~30t/h。</span></p><p style="margin-bottom:10px;margin-left:118px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">3）發送罐式，空氣直接通入料倉，使粉料和空氣從料倉出口排出。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">上述方式根據氣速、氣量和壓力的不同進行選取。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">具體的噴射給料器、回轉給料器、螺旋給料機、發送罐等設備信息可參見有關文獻及手冊。</span></p><h3><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""><strong>2.6 雙管輸送</strong></span></h3><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">高壓低速氣力輸送可采用主管和輔管雙氣力輸送管道。輔管平行配置于主輸送管旁。在主管和輔管之間每隔500mm~1000mm有一個連接管，在連接管上裝有過濾嘴、單向閥。如圖2示。</span></p><p style="margin-bottom:10px;text-indent:44px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">雙管輸送的特點：</span></p><p style="margin-bottom:10px;margin-left:127px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">1）當意外出現斷電、停氣造成堵管后，重新啟動系統能夠自動疏通管道。</span></p><p style="margin-bottom:10px;margin-left:127px;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">2）主、輔管之間的壓差使較長的物料被連續切成小段，在輸送壓縮空氣的推動下達到良好的輸送效果。</span></p><p style="margin-bottom: 10px; line-height: 29px; text-align: center;"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> <img src="uploadfile/2020/0310/20200310025219608.png"/><br/><img src="uploadfile/2020/0310/20200310025220951.png"/><br/></span></p><p style="margin-bottom:10px;text-align:center;line-height:29px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">圖2 雙管輸送示意圖（江西白炭黑）</span></p><p style="margin-bottom: 10px; text-align: left; line-height: 29px;"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> </span><strong style="font-family: 微軟雅黑, " microsoft="">2.7 移動式氣力輸送機</strong></p><p style="text-indent:37px"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft="">對于料場、堆場等無灰斗或料倉等固定儲灰設備的應用，好科科技提供各種型號的移動式氣力輸送機。</span></p><p style="text-align: center;"><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> </span><span style="font-family: 微軟雅黑, " microsoft="" text-align:=""> <img src="uploadfile/2020/0310/20200310025305676.png"/><br/>圖3 好科科技移動式氣力輸送機（湛江鋼鐵）</span></p><p><span style="font-size: 16px; font-family: 微軟雅黑, " microsoft=""> </span></p><p style="text-indent:37px"><span style="font-size: 16px; font-family: 微軟雅黑, " 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