Argon pump trip

When neither the main nor the backup argon pump can be started~~there is no need to worry about argon contamination of the liquid oxygen in the main cooler; however, attention should be paid to the degree of closure of the liquid-air valve in the crude argon condenser, and adjustments should be made in coordination with the main tower. The amount of liquid nitrogen exiting the tower needs to be increased promptly~~

This issue is primarily aimed at addressing the problem of excessive cooling capacity in the main tower after the argon system is shut off; it is necessary to store this excess cooling capacity (in liquid form) or remove it (converting the liquid argon cooling capacity into liquid nitrogen and liquid oxygen and removing them). In actual design, the heights of the lower column and the bottom of the crude argon column are limited; once the argon pump stops, the lower column and the crude argon column often end up covering the air inlets. Therefore, during normal operation, it is not advisable to allow the liquid level at the bottom of the column and the crude argon column to become too high, in order to have a certain degree of operational margin. Since the liquid from the crude argon column is sent back to the upper column based on static level measurements, the impact of this liquid being sent back to the upper column on oxygen purity can only be adjusted by reducing the oxygen production. An excess of cooling capacity is relative; the expander must operate at a reduced capacity, and the extent of this reduction should be determined based on the main cooling load and the liquid production volume.