One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； April 30th
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Single-choice question: For the hot air heater used to dry PVC slurry, air is heated with atmospheric-pressure saturated steam (the condensate is discharged at the saturation temperature); the saturated steam should flow through ( ), and the direction of steam flow is ( ). A. Tube side, from bottom to top B. Shell side, from bottom to top C. Tube side, from top to bottom D. Shell side, from top to bottom Answer: C. Tube side, from top to bottom
For the PVC slurry drying hot air heater, air is heated using atmospheric pressure saturated steam (the condensate is discharged at the saturation temperature); the saturated steam should flow in direction ( C ), and the steam flow direction is ( C ). A. Tube side, from bottom to top B. Shell side, from bottom to top C. Tube side, from top to bottom D. Shell side, from top to bottom