【Daily Question】Chemical Engineering Principles 438: Superheater (September 30)
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This post was last edited by Zaihui Kangqiao on 2016-9-30 08:29. The Chemical Engineering Theory section is launching a \"One Question per Day\" campaign starting today, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will cover topics such as \"Fundamentals of Chemical Engineering,\" \"Mass Transfer and Separation,\" \"Chemical Engineering Thermodynamics,\" and \"Chemical Process Engineering.\" We hope you will give it your active support! Wishing everyone a happy Christmas! Answers to the questions in the \"One Question per Day\" campaign can be viewed directly; the thread will be closed after 1 day ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ True or False: The salts that accumulate in the superheater are mainly SiO2. Wrong
Incorrect; the deposits in the superheater are impurities carried by saturated steam, mainly sodium sulfate, sodium phosphate, SiO2, and sodium hydroxide. Sodium hydroxide and SiO2 generally travel with the steam to the turbine, while sodium chloride has a high solubility at pressures greater than 9.8 MPa, so it also reaches the turbine along with the steam. Therefore, in medium and low-pressure boiler superheaters, the main deposits are Na2SO4, Na3PO4, and NaCl; in high-pressure boiler superheaters, the main deposits are the first two substances, with no NaCl present
Correct,√~~~~~~~~~
It’s not silica; it’s calcium carbonate and magnesium hydroxide.