求粉煤角阀的结构及特性介绍? 煤粉输送 schuf 角阀 see the attachment. type 74 cs introduction: schuf valves used in shell process in the shell process, the coal is finely ground and is transported by the use of carrier gas into a gasifier. the control of the flow of the coal suspended in carrier gas is a critical and complex task for a control valve . complex because the valve must be sized in a way to prevent settling of the coal in the valve, which means maintaining certain minimum speeds of coal flow. however at these speeds, the coal is very abrasive, which means that the choice of material will have to include solid tungsten carbide parts. the high solids content mean that a multi-stage control valve is not suitable, while the abrasion means that a traditional single seat will erode too quickly, leading to a special control disc and seat design. finally the clean air requirements mandates the use of a bellows into the yoke. this bellows must be protected from the very coal that it is meant to seal. for the shell process, schuf has further developed a coal feed control valve to include many unique features to enhance its performance, while reducing the cost. 查看更多
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