Practical Exercise on Purification Technology Version [009]
Thread Content
What are the factors that can cause an excess of H2S in the process gas exiting the absorption tower? Answer: The reasons are: (1) too low methanol circulation rate; (2) too high temperature of the lean methanol flowing to the absorption tower; (3) poor efficiency of thermal regeneration of methanol; (4) low methanol absorption capacity; (5) sharp fluctuations in the amount of process gas; (6) too rapid increase in load
The reasons are: (1) The methanol circulation rate is too low； (2) The temperature of the lean methanol flowing to the absorption tower is too high ； (3) Thermal regeneration of methanol yields poor results ； (4) Low methanol absorption capacity ； (5) Sudden fluctuations in process gas flow rate ； (6) Loading too quickly.
Answer: 1. Unconverted organic sulfur 2. Methanol washing temperature 3. Circulation volume of washing methanol 4. Regeneration quality of methanol 5. Purity of methanol 6. Excessive NH3 in the inlet shift gas 7. Equipment-related issues
1) Insufficient methanol flow in the H2S absorption tower. 2) The methanol temperature in the H2S absorption tower is too high. 3) The pressure in the H2S absorption tower is too low. 4) The H2S content in methanol is too high after thermal regeneration, resulting in unsatisfactory methanol regeneration. 5) High NH3 content in the hot regeneration slurry/methanol after hot regeneration.
(1) Insufficient methanol circulation rate (2) Excessively high temperature of lean methanol stream (3) Poor efficiency in regenerating methanol (4) Low methanol absorption capacity (5) Sharp fluctuations in process gas flow rate (6) Too rapid load increase (7) Decreased heat exchange efficiency (8) Excessively high H2S content at the outlet
Pressure and temperature of the absorption tower, effectiveness of the absorbent.
(1) Insufficient methanol circulation rate (2) Excessively high temperature of lean methanol in the absorption tower (3) Poor efficiency of thermal regeneration of methanol (4) Low methanol absorption capacity (5) Sudden fluctuations in process gas flow rate (6) Too rapid load increase
(1) Insufficient methanol circulation rate (2) Excessively high temperature of the lean methanol stream leaving the tower (3) Poor efficiency of heat regeneration of methanol in the tower (4) Low methanol absorption capacity (5) Sudden fluctuations in the amount of process gas (6) Too rapid increase in load (7) Decreased heat exchange efficiency (8) Excessively high H2S content at the tower outlet
1. The methanol circulation rate is too low. 2. The temperature of the lean methanol stream going to T0206 is too high. 3. The thermal regeneration of methanol at T0605 is ineffective. 4. The methanol absorption capacity is low. 5. There are sharp fluctuations in the amount of process gas. 6. The load is increased too quickly. 7. The thermal efficiency of E0608 has decreased. 8. The hydrogen sulfide content at the outlet of T0601 is too high
The reasons are: (1) too low methanol circulation rate; (2) excessively high temperature of the lean methanol flowing to the absorption tower; (3) poor efficiency of heat-regenerated methanol; (4) low methanol absorption capacity; (5) sharp fluctuations in the process gas flow rate; (6) too rapid load increase
The reasons are: (1) too low methanol circulation rate, (2) excessively high temperature of the lean methanol flowing to the absorption tower, (3) poor efficiency of heat-regenerated methanol, (4) low methanol absorption capacity, (5) sharp fluctuations in the process gas flow rate, (6) too rapid load increase