论文部分内容阅读
小型合成氨厂造气风机出口阀门仍采用DT41W—0.2手动蝶阀。该阀门虽然制造简单,价格低廉,但由于阀体与圆型阀板径向间隙较大,内密封极差。以10—198.4D风机为例,据测定与简略计算,阀门每小时泄漏量约有800m~3。如设置3台鼓风机,一开两备,泄漏则成倍增加。当鼓风机工作时,不仅因为蝶阀泄漏,影响入炉风量与风压,并且易使备用鼓风机风叶倒转(转速高达800～900rpm),做无功损耗,使工作风机电流升高,甚至烧坏电机。在停车状态下,由于阀门关闭不严,使煤气倒流,隐藏着引爆鼓风机
Small ammonia plant gas generator fan outlet valve is still used DT41W-0.2 manual butterfly valve. Although the valve manufacturing simple, inexpensive, but due to the radial clearance between the valve body and the circular valve plate larger, very poor seal. To 10-198.4D fan, for example, according to the determination and calculation, the valve leaks about 800m ~ 3 per hour. If set 3 blowers, opened two reserves, the leakage is multiplied. When the blower work, not only because of the butterfly valve leakage, affecting the furnace air volume and wind pressure, and easy to make spare blower blades reverse (speed up to 800 ~ 900rpm), so reactive loss, the working fan current, or even burn the motor . In the parking state, due to lax valve closure, the gas back, hiding detonation blower