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<script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdUrl":'http:///article/show/sid/697/id/480.html',"bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> </span> </div> <ul style=" margin:10px 0px;"> </ul> <div id="spbgpxi" class="text editor"><span style="font-size:14px;">　　生物質(zhì)鍋爐使用，啟動前的進(jìn)水速度不宜過快，冬季一般不低于4h，其他季節(jié)為2~3h，主要是在采水初期。生物質(zhì)鍋爐的給水溫度通常為50-90°C，因此進(jìn)入汽包的給水溫度與汽包壁溫度之間的差值不超過40°C。冷卻后，入口水溫與汽包壁溫度相當(dāng)，否則應(yīng)減慢進(jìn)水速度。<br /> 　　當(dāng)給水進(jìn)入汽包時，它總是先接觸汽包的下半部分。如果給水溫度和汽包壁溫度之間的差異太大，則進(jìn)水速度快，并且汽包的上壁和下壁，內(nèi)壁和外壁將具有大的膨脹。在汽包上造成很大的附加應(yīng)力，導(dǎo)致汽包變形，嚴(yán)重時會開裂。<br /> 　　由于汽包的壁厚，膨脹緩慢，連接到汽包壁的管壁較薄，膨脹較快。如果它的入口溫度過高或進(jìn)水速度過快，則會導(dǎo)致膨脹不均勻，導(dǎo)致焊縫出現(xiàn)裂縫并對生物質(zhì)鍋爐造成損壞。因此，在它的運(yùn)行過程中，我們不能忽視進(jìn)水過快的問題，否則影響將很嚴(yán)重。<br /> 　　它的設(shè)計(jì)，制造，安裝和使用均符合標(biāo)準(zhǔn)GB/T2624-93流量測量標(biāo)準(zhǔn)節(jié)流裝置設(shè)計(jì)，安裝和使用手冊稱為“標(biāo)準(zhǔn)節(jié)流裝置”的節(jié)流裝置。優(yōu)點(diǎn)是流速和壓差之間的關(guān)系可以通過標(biāo)準(zhǔn)提供的數(shù)據(jù)直接計(jì)算，而不用通過校準(zhǔn)或校準(zhǔn)獲得。上述國家標(biāo)準(zhǔn)符合ISO推出的ISO5167-1標(biāo)準(zhǔn)。<br /> 　　標(biāo)準(zhǔn)節(jié)流裝置適用于測量圓形管道中單相均質(zhì)流體的流量。它需要流體填充管道，在節(jié)流閥前后一定距離內(nèi)沒有相變或沉淀，并且流速小于聲速。該流動是非脈動流動，并且流過節(jié)流閥之前的流體流動平行于管道的軸線并且沒有旋流。流動條件是發(fā)展的湍流。<br /> 　　<br /> </span></div> <div id="spbgpxi" class="page" style="clear:both;"> 上一條：<a href="http:///news/zhongxin/show486.html">煙氣脫白工藝原理</a><br> 下一條：<a href="http:///news/zhongxin/show477.html">熱管式余熱鍋爐的能效如何</a><br> </div> <h4 class="related"><span style="font-weight:bold;height:30px;line-height:30px;font-size:13px; color:#fff; padding-left:10px">相關(guān)資料</span></h4> <ul class="related-list"> <li><a target="_blank" title="余熱鍋爐的基本原理" href="http:///news/zhongxin/show438.html">余熱鍋爐的基本原理</a></li><li><a target="_blank" title="可利用余熱的來源" 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