Material selection for the vaporizer in ethanol production plants
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Shell-side fluid: ethanol (liquid, vapor); inlet temperature is 200°C, outlet temperature is 1280°C, and the operating pressure is 0.3 MPa. Tube-side fluid: saturated water vapor; operating pressure is 1.0 MPa, inlet temperature is 1800°C, outlet temperature is 1600°C, and the flow rate is 10,000 Kg/h. I chose a U-tube heat exchanger with an evaporation space. The material specified in the reference drawings provided by the teacher is S30408; I also selected stainless steel for this purpose. The reasons I gave for this choice are as follows: 1. There are phase changes in both the tube side and the shell side, resulting in complex stress conditions; 2. Stainless steel does not rust, which helps to reduce static electricity; 3. Ethanol’s corrosive effect increases at high temperatures. Is this a reasonable choice? Are there any other reasons? I would be very grateful if you could provide your insights
“Saturated water vapor, with a working pressure of 1.0 MPa; the inlet temperature is 1800°C in all cases, and the outlet temperature is 1600°C in all cases. ” Can saturated water vapor have such a high temperature?
I think it should be 160°C; he doesn’t use symbols