除塵風(fēng)機(jī)選型參數(shù)的確定 |
風(fēng)機(jī)入口風(fēng)量應(yīng)為工況風(fēng)量,也可以提供標(biāo)態(tài)風(fēng)量、溫度、壓力等參數(shù)。風(fēng)機(jī)入口風(fēng)量=系統(tǒng)風(fēng)量+設(shè)備的漏風(fēng)量按規(guī)范要求,脈沖袋式除塵器的漏風(fēng)率不小于3%。風(fēng)機(jī)全壓應(yīng)根據(jù)管網(wǎng)阻力確定,同時(shí)還應(yīng)在系統(tǒng)計(jì)算的壓力損失上附加10~15%,且應(yīng)標(biāo)明風(fēng)機(jī)入口壓力和出口壓力。對于風(fēng)機(jī)轉(zhuǎn)速選擇應(yīng)兼顧成本與運(yùn)行安全,因?yàn)槌龎m系統(tǒng)通常是全年不間斷的運(yùn)行。風(fēng)機(jī)的設(shè)計(jì)轉(zhuǎn)速提高,可減少風(fēng)機(jī)的尺寸,節(jié)約成本,但是容易引起軸承振動增加,風(fēng)機(jī)運(yùn)行的 可靠性降低。對于風(fēng)機(jī)選型還應(yīng)注意以下問題:
(1)風(fēng)機(jī)的設(shè)計(jì)工況效率,不應(yīng)低于風(fēng)機(jī)**效率的90%。這點(diǎn)對工況比較穩(wěn)定的除塵系統(tǒng)容易實(shí)現(xiàn),對需要調(diào)速和除塵點(diǎn)切換的除塵系統(tǒng)可能不能滿足。
(2)當(dāng)選用液力偶合器進(jìn)行調(diào)速的風(fēng)機(jī),應(yīng)考慮液力偶合器3%左右的滑差率對實(shí)際出力的影響。因此風(fēng)機(jī)參數(shù)應(yīng)適當(dāng)提高。
玻璃鋼屋頂風(fēng)機(jī)http://www.dzcfkt.com
資訊來源:http://www.dzcfkt.com/content/?1448.html
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