Purification Technology Q&A Version [034]
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What are the reasons for the excessive CO levels at the medium-voltage outlet? 1) Poor catalyst activity ； 2) High load ； 3) Low gas/air ratio; 4) Low bed temperature; 5) Gas taking a shorter path; 6) Leakage in the intermediate heat exchanger; 7) Significant fluctuations in pressure or gas flow rate. Coalification Zone Purification Technology Edition – “My Technical Upgrades” in Coal Chemical Industry, 2017 (with generous rewards) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – “Learning from Others’ Experiences” event http://bbs.hcbbs.com/thread-1808158-1-1.html
1. The water vapor ratio might be too low. 2. It may be catalyst poisoning (commonly occurring in iron-chromium catalysts). 3. Vary the catalyst furnace temperature fluctuations. 4. The activity of the conversion catalyst decreases. 5. The opening degree of the CO regulation bypass is too large.
1) Poor catalyst activity； 2) High load ； 3) Low gas/air ratio; 4) Low bed temperature; 5) Gas taking a shortcut; 6) Leakage in the middle converter; 7) Large fluctuations in pressure or gas flow rate.
1) Poor catalyst activity； 2) High load ； 3) Low bed temperature; 4) Gas taking a shortcut; 5) Leakage in the intermediate heat exchanger; 6) Large fluctuations in pressure or gas flow rate.
1. The water vapor ratio might be too low. 2. It could be catalyst poisoning. 3. Vary the catalyst furnace temperature fluctuations. 4. The activity of the conversion catalyst decreases. 5. The opening degree of the CO regulation bypass is too large.
1) Poor catalyst activity; 2) High load; 3) Low steam/gas ratio; 4) Low bed temperature; 5) Gas taking a shortcut; 6) Leakage in the middle shift reactor; 7) Large fluctuations in pressure or gas flow rate.
1) Poor catalyst activity； 2) High load ； 3) Low gas/air ratio; 4) Low bed temperature; 5) Gas taking a shortcut; 6) Leakage in the middle converter
CO level at the low-temperature shift inlet is excessively high ； Toxicity or aging in low-temperature shift catalysts ；
Catalyst activity, load fluctuations. Temperature.
1) Poor catalyst activity； 2) High load ； 3) Low steam/gas ratio ； 4) Low bed temperature ； 5) Shorter route for the gas ； 6) Leakage in the intermediate heat exchanger ； 7) Significant fluctuations in pressure or gas flow rate.