Pressure Vessel Design Approver Exam Questions
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There is a stirred-tank reactor whose working medium consists of glucose, hydrogen, and water, along with a small amount of chlorine. The operating temperature is 150°C and the operating pressure is 3.5 MPa. Loading and unloading take place 4 times per shift (8 hours), with the reactor operating 300 days per year; its expected service life is 15 years. Please analyze what factors should be considered in the material selection and structural design of this container, and what design criteria should be used to determine its design life.
Since this device contains chlorine, it indicates that the medium is extremely hazardous; therefore, it must be designed and manufactured in accordance with the requirements for extremely hazardous materials； It contains hydrogen, but the temperature is not high – it does not exceed 200°C – so using Q345R material will meet the requirements. It needs to be loaded and unloaded 4 times a day; over 300 days in a year, that’s 1,200 times per year. Over 15 years, the total number of times is 1.8××10 to the power of 4. I don’t have the book \"Pressure Vessel Engineer Training Manual\" with me right now, but I remember that if the number of loads exceeds 1,000, stress analysis methods must be used for design. Please check that book – it contains clear specifications on this matter. Well, what I’ve said above is merely meant to spark discussion; I welcome other sailors to share their insights.
Hello, 4 times per shift, which means 12 times per day; over 15 years, that totals 54,000 times