Efficient and high-yield air separation system and control method thereof

The invention provides an efficient and high-yield air separation system and a control method thereof. The problems that according to an existing air separation system, the liquid oxygen yield is low, a standby system is high in energy consumption, the liquid oxygen loss is large, and undisturbed switching cannot be achieved are solved. In the efficient and high-yield air separation system, a first outlet of a main condensation evaporator is connected with an inlet of a high-pressure plate heat exchanger through a standby pipeline, a process oxygen pump is arranged on the standby pipeline, and an outlet of the high-pressure plate heat exchanger is connected with a gas supply pipe network; a second outlet of the main condensation evaporator is connected with an inlet of a liquid oxygen storage tank through an extraction pipeline, an outlet of the liquid oxygen storage tank is connected with the high-pressure plate heat exchanger through a main pipeline, and a storage tank oxygen pump is arranged on the main pi