How to determine the proportion of baffle arch defects
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How is the proportion of baffle arch defects determined? ? Depressed
The principle for determining the notches in the baffle plates should be to calculate the spacing between the baffle plates based on process considerations. Once this spacing is determined, it is necessary to calculate the flow area between two baffle plates, at the center of the shell side or near the center (in the case of partition plates). This area is obtained by multiplying the shell diameter (or chord length) by the baffle plate spacing and then subtracting the area of the heat exchange tubes; this resulting area should be roughly equal to the area of the notches in the baffle plates (after also deducting the cross-sectional area of the heat exchange tubes). For reference only
The chord height of the notch should be taken as 0.2–0.45 times the diameter of the cylinder
The height of the notch in the arcuate baffle should be such that the flow velocity of the fluid as it passes through the notch is similar to that when it flows across the tube bundle; the size of the notch is determined by the percentage of the height of the removed arcuate chord relative to the inner diameter of the cylinder.