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主风机是催化裂化装置的主要设备。其作用是向再生器提供适量的空气,以满足催化剂再生烧焦的需要。而主风机的换机操作直接影响向再生器提供的空气量,即直接影响装置的平稳操作。有时还会造成主风机“飞动”,给机组带来不良影响。为避免上述问题的发生,我们搞了一种“静态换机法”,即在开关主风机出口大阀时,保持阀门前后的空气介质处于静止状态。几年的实践证明,这种换机方法操作简便,流量平稳、安全可靠,现简述如下: 1.基本原理根据流体力学原理,液体或气体在密闭设备及管路内由于压差或位差产生流动。如在换机过程中,严格控制主机出口大阀前后压力
The main fan is the main equipment of catalytic cracking unit. Its role is to provide the regenerator the right amount of air, in order to meet the needs of catalyst regeneration scorch. The main fan replacement operation directly affects the amount of air supplied to the regenerator, which directly affects the smooth operation of the device. Sometimes it will cause the main fan to “fly”, bringing adverse effects to the unit. In order to avoid the above problems, we made a “static replacement method”, that is, when switching the main fan outlet valve, keep the air before and after the valve medium at rest. Years of practice has proved that this replacement method is simple, smooth flow, safe and reliable, are summarized as follows: 1. Basic principles According to the principle of fluid mechanics, liquid or gas in the closed equipment and piping due to pressure or potential difference Produce flow. As in the replacement process, the strict control of the host outlet before and after the pressure valve