Estimate the mass of the vessel designed in Problem 23.24, assuming a corrosion allowance of 6.35 mm and a material of construction of SA515-70 carbon steel. Use 2:1 elliptical heads but do not consider any additional mass for nozzles and manways. You should assume that double-welded butt joints that are fully radiographed are used throughout the construction of the vessel.

Problem 23.24

A V-L separator drum is to be designed downstream of a reactor. The stream leaving a partial condenser that is the feed to the knockout drum has the following properties:

Answer the following questions:

1. What should the orientation of the vessel be and why?

2. Determine the diameter of the vessel needed to remove 100 μm diameter drops.

3. Determine the minimum pipe diameter of schedule 40 pipe required such that a vane-type inlet device can be used. Use the data from Table 23.8 and assume that the flow is homogeneous; that is, the velocity of gas and liquid is the same—no slip between phases.

4. Determine the appropriate holdup time and volume of liquid holdup.

5. Determine all the key vessel dimensions such as NOL, HHAL, and LLAL.

Sketch a vessel diagram showing the location of the inlets and outlets and note all key dimensions on the diagram.

Transcribed Image Text:

Vapor mass fraction, x = 0.45 Mass flowrate of feed stream = 70.5 kg/s M of vapor = 59 g/mol (assume ideal gas behavior) M of liquid = 80g/mol, density of liquid = 1080kg/m³ Gas viscosity = 9.8 x 10-6kg/m/s Temperature of stream= 93°C, pressure of stream = 1075 kPa