【Daily Question】September 22: What is the correct procedure for injecting fuel into the riser when starting up a catalytic cracking unit?
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One daily activity question (single-choice question): When starting up a catalytic cracking unit, which of the following is the correct procedure for injecting fuel into the riser? (A) The reaction temperature should be no less than 460°C. (B) The regeneration temperature should be no less than 500°C. (C) As the feed rate increases, the amount of emergency steam used should be increased gradually. (D) If the regeneration temperature is insufficient, burn fuel oil to raise the temperature. Answer: (D) The regeneration temperature is insufficient; burn fuel oil to raise the temperature. Please participate actively for prizes. +5 points for correct answers, +2 points for participation. One time per person only. Close this topic in two days.
(A) The reaction temperature is not lower than 460℃
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(B) The regeneration temperature shall be no lower than 500℃
When starting up a catalytic cracking unit, the correct operation for injecting fuel into the riser is (D). (A) Reaction temperature not less than 460°C (B) Regeneration temperature not less than 500°C (C) Gradually increase emergency steam as the feed rate increases (D) Insufficient regeneration temperature – use burn oil to raise the temperature
c. Is it starting to produce steam for inflation?
(A) The reaction temperature is not lower than 460℃
When starting up a catalytic cracking unit, the correct operation for injecting fuel into the riser is (D).
When starting up a catalytic cracking unit, the correct operation for injecting fuel into the riser is ( ). (A) Reaction temperature not less than 460°C (B) Regeneration temperature not less than 500°C (C) Gradually increase emergency steam as the feed rate increases (D) Insufficient regeneration temperature; use burn oil to raise the temperature. Answer: D