One Question per Day: Methanol Technology Exchange Edition 20180616
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Brief description: During the startup of the air separation unit, after the molecular sieve adsorbers are brought online (including adsorption and regeneration), they must operate for at least one cycle normally, and the CO2 concentration must be AIA-203≤1 Ppm before air can be sent to the distillation column. In the initial stages of unit startup, when there is no contaminated nitrogen available, purified air (with CO2≤1 Ppm and H2O≤10 Ppm) is used to heat and cool the molecular sieves for regeneration. Note: The air flow rate entering the molecular sieve purification system must be controlled so that the resistance of the PdIAS-205 does not exceed 8 KPa, in order to prevent the molecular sieve bed from being damaged due to high pressure differences.
During the startup of the air separation unit, after the molecular sieve adsorbers are activated (including adsorption and regeneration), they must operate for at least one cycle normally, and the CO2 concentration must be AIA-203≤1 Ppm before air can be fed into the distillation column. In the early stages of startup, when there is no contaminated nitrogen available, purified air (with CO2≤1 Ppm and H2O≤10 Ppm) is used to heat and cool the molecular sieves for regeneration.
Correct: During the startup of the air separation unit, after the molecular sieve adsorbers are activated (including adsorption and regeneration), they must operate normally for at least one cycle, and the CO2 concentration must be AIA-203≤1 Ppm before air can be sent to the distillation column. In the initial stages of startup, when there is no contaminated nitrogen available, purified air (with CO2≤1 Ppm and H2O≤10 Ppm) is used to heat and cool the molecular sieves for regeneration.
During the startup of the air separation unit, after the molecular sieve adsorbers are activated (including adsorption and regeneration), they must operate for at least one cycle normally, and the CO2 concentration must be AIA-203≤1 Ppm before air can be fed into the distillation column. In the early stages of startup, when there is no contaminated nitrogen available, purified air (with CO2≤1 Ppm and H2O≤10 Ppm) is used to heat and cool the molecular sieves for regeneration. Note: The air flow rate entering the molecular sieve purification system must be controlled so that the resistance of the PdIAS-205 does not exceed 8 KPa, in order to prevent the molecular sieve bed from being damaged due to high pressure differences.