Purification Technology Edition Daily Question (Short Answer) [2018-2-13]
Thread Content
What are the reasons for the excessive CO levels at the low-variation outlet? 1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature that is too low or too high; 5) Occurrence of reverse sulfidation; 6) High CO content at the middle and outlet stages;
The main cause is catalyst chloride ion poisoning. The problem of excessive carbon monoxide levels in low-grade product output can be effectively resolved by increasing the amount of low-temperature catalysts, using dechlorination agents, and enhancing catalyst maintenance.
Possible causes: ⑴ Excessive load ⑵ Too low water-to-gas ratio ⑶ Too low furnace temperature ⑷ Too rapid load increase ⑸ Declining catalyst activity ⑹ Holes in the catalyst layer, causing gas to take a short circuit ⑺ Catalyst poisoning ⑻ Large fluctuations in system pressure ⑼ Internal leakage in the heat exchanger
Answer: 1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature too low or too high; 5) During reverse sulfidation; 6) High CO content at the middle and outlet stages;
1) Poor catalyst activity； 2) High load ； 3) Low gas/air ratio; 4) Low bed temperature; 5) Gas taking a short route; 6) Leakage in the intermediate heat exchanger; 7) Large fluctuations in pressure or gas flow rate.
1. Low gas-to-vapor ratio 2. Low steam pressure 3. Large fluctuations in furnace temperature 4. Reduced catalyst activity 5. Short circuits in the catalyst layer 6. Internal leakage in the heat exchanger
1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature too low or too high; 5) Occurrence of reverse sulfidation; 6) High CO content at the middle and outlet.
1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature too low or too high; 5) Reverse sulfidation occurring; 6) High CO content at the middle and outlet stages;
1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature that is too low or too high; 5) Occurrence of reverse sulfidation; 6) High CO content at the middle and outlet stages;
1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature that is too low or too high; 5) Occurrence of reverse sulfidation; 6) High CO content at the middle and outlet stages;
1) Excessive load; 2) Poor catalyst activity; 3) Low steam ratio; 4) Bed temperature that is too low or too high; 5) Occurrence of reverse sulfidation; 6) High CO content at the middle and outlet stages;