| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of controlling the operation of an air separator which quickly regulates the quantity of production of each product. SOLUTION: The data of each quantity in the process state of the purity CV1 of oxygen of a product taken out of the top of a rectifying column 4, the purity CV2 of nitrogen of a product, and the purity CV3 of crude argon of an intermediate product taken out of a crude argon column 6, the flow CV4 of material air, the flow CV5 of material air introduced as a refrigerant into the top of the rectifying column, and the takeout flow CV6 of crude argon from an intermediate product taken out of the crude argon column, as the targets of control, and the flow MV1 of material air, the flow MV2 of material air introduced as a refrigerant into the top of the rectifying column, the takeout flow MV3 of oxygen from a product, the reflux flow MV4 of nitrogen introduced from the bottom of the rectifying column, the reflux flow MV5 of crude argon to a crude argon column, and the takeout flow MV6 of crude argon from an intermediate product, as the targets of operation, are taken into a computer, and CV1-CV3 are compared with each objective value, and MV1-MV4 are operated.
|
