粉尘爆炸机理及防治企管精选PPT.ppt

《粉尘爆炸机理及防治企管精选PPT.ppt》由会员分享，可在线阅读，更多相关《粉尘爆炸机理及防治企管精选PPT.ppt（112页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、关于粉尘爆炸机理及防治企管第1页，讲稿共112张，创作于星期二扫描电镜下的粉尘粒子 木粉粒子图像 淀粉粒子图像，典型粒径 1015m第2页，讲稿共112张，创作于星期二粉末（powder）粉尘（dust）v粉末Powder：粒径小于1000 m【BS 2955】v粉尘Dust 1：粒径小于76 m(200 BSmesh size)BS 2955 Dust 2：粒径小于420 m NFPA第3页，讲稿共112张，创作于星期二粉尘为什么会爆炸？v可燃物质分得越细燃烧速度越快越容易点燃v以粉末（粒径 0,5 kg/m-10 kg/mEF=1(AD=AE)if A/V0.753 10 kg/mEF p

2、1第96页，讲稿共112张，创作于星期二Pressure Time Histories of Dust Explosions in Interconnected Vented Vessels Vessel 1(10 m);Vessel(4 m);Dust:Corn Starch Pipe:length l=30 m,diameter d=300 mm;第97页，讲稿共112张，创作于星期二When can explosion propagation occur via pipes?Pipe Diameterv flame propagation is possible even in smal

3、l diameters (corn starch:d=27 mm;l=15 m)v probability rises with increasing pipe diameterAir Flow-Tendentiously air flow favoursthe explosion propagation in direction of flowvHoweverexplosion transmission occurs also against direction of flow:velocity of expansion flow velocity of air flow第98页，讲稿共11

4、2张，创作于星期二Explosion Propagation through Pipes Dust:corn starch;Pipe Diameter:80 mm;Length:30 m第99页，讲稿共112张，创作于星期二连通设备间的爆炸第100页，讲稿共112张，创作于星期二Explosion Isolation SystemsActive Isolation Systems require detection and control equipmentv Explosion Protection Valve v Rapid-Action Gate Valvev Extinguishing

5、 BarrierPassive Isolation Systemsdo not require detection and control equipmentvExplosion Protection Valve Ventex“v Diverter第101页，讲稿共112张，创作于星期二Explosion Isolation SystemsEquipment permanent installed in the product flowv Rotary Valve v Screw Conveyorv Product Receiver第102页，讲稿共112张，创作于星期二Explosion I

6、solation Systems-ActiveExplosion Protection ValveControl UnitSensor 1(Pressure)Sensor 2(Infrared)Distance L第103页，讲稿共112张，创作于星期二Rapid-action gate valve第104页，讲稿共112张，创作于星期二第105页，讲稿共112张，创作于星期二第106页，讲稿共112张，创作于星期二Explosion Protection Valve-passive第107页，讲稿共112张，创作于星期二Explosion diverter第108页，讲稿共112张，创作于星期二Application of diverter第109页，讲稿共112张，创作于星期二第110页，讲稿共112张，创作于星期二第111页，讲稿共112张，创作于星期二感谢大家观看第112页，讲稿共112张，创作于星期二