Purification Technology Edition Daily Question (Short Answer) [2018-2-12]
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Where is the methanol primarily consumed in the low-temperature methanol washing unit? How to reduce methanol consumption? Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.
Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.
Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases
Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.
Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.
(1) The nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.
In the low-temperature methanol washing unit, the CO2 absorption tower has the highest methanol consumption.
Consumption: (1) Nitrogen is stripped and vented out of the system. ? (2) Acidic gases are vented out of the system. ? (3) The water at the bottom of the methanol-water separation tower is drained out of the system. ? (4) Carried out of the system with the process gas. ? Measures: (1) Increase the ammonia supply to the ammonia cooler. ? (2) Reduce the methanol flash temperature. ? (3) Reduce the temperature of acidic gases
Consumption: 1) Methanol is carried away during the stripping of nitrogen gas; 2) Methanol is carried away by acidic gases; 3) Moisture in the bottom liquid of the methanol recovery column also carries away methanol; 4) Other process gases carry away methanol as well. Measures: 1) Increase the ammonia supply to the ammonia cooler to enable methanol to condense at a lower temperature in the gas phase; 2) Lower the flashing temperature of methanol; 3) Reduce the temperature of acidic gases
Consumption: 1) Methanol is carried away during the stripping of nitrogen gas; 2) Methanol is carried away by acidic gases; 3) Moisture in the bottom liquid of the methanol recovery column also carries away methanol; 4) Other process gases carry away methanol as well. Measures: 1) Increase the ammonia supply to the ammonia cooler to enable methanol to condense at a lower temperature in the gas phase; 2) Lower the flashing temperature of methanol; 3) Reduce the temperature of acidic gases
Answer: Consumption: (1) Nitrogen is stripped and vented out of the system. (2) Acidic gases are vented out of the system. (3) The water at the bottom of the methanol-water separation tower is drained out of the system. (4) Carried out of the system with the process gas. Measures: (1) Increase the ammonia supply to the ammonia cooler. (2) Reduce the methanol flash temperature. (3) Reduce the temperature of acidic gases.