When there is abundant oxygen and it is necessary to reduce oxygen production, the first step is to reduce the output of oxygen products, then correspondingly reduce the air flow rate, and adjust the expansion air volume according to the main cooling liquid level. The liquid air and liquid nitrogen control valves sent to the upper tower should also be correspondingly turned down according to the distillation conditions. It should be noted that the entire operation should be completed slowly and gradually to maintain the stability of the distillation conditions during the reduction process.
If there is a liquid oxygen storage system, reducing oxygen production can increase the production of liquid oxygen, making it more convenient to store it. You can first reduce the oxygen production, then increase the expansion air volume, and increase the extraction amount of liquid oxygen while maintaining the main cooling liquid level unchanged. To maintain the stability of the distillation conditions in the upper tower, some expansion air can be bypassed if necessary.
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