What is the reason for the significant decrease in the oxygen content in catalyzed flue gas, or even its reduction to zero?
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What are the reasons for the rapid decrease and eventual drop to zero of the oxygen content in flue gas during the heavy oil catalytic cracking production process?
Has the main air volume changed? 1. The oil suddenly becomes heavier, leading to an increase in coke in the catalyst. 2. Excessive main air flow
The possible reasons are: 1) secondary combustion; 2) carbon pile; 3) oil contamination in the raw material; 4) sudden drop in main air flow; 5) sudden increase in slag addition; 6) malfunction of the oxygen meter
1. Decrease in main air volume； 2. The properties of the raw materials have become more severe ； 3. Increase in reprocessing ratio ； 4. The amount of stripping steam and atomization steam is reduced.
Has your amount of catalyst to be added suddenly increased?
Secondary combustion caused by an increased main air flow rate or abnormal fluidization.
1. The main air flow decreases rapidly. 2. Carbon buildup on the catalyst. 3. Use of carbon monoxide as a combustion aid