In the normal operation stage, the surface appearance of the rise and fall of the liquid oxygen surface is reflected from the condenser evaporator, but in reality, it is the result of a series of heat transfer.
How to convert cooling capacity into liquid production? When the condenser evaporator is in the cooling balance stage, if the liquid oxygen level still needs to rise, it is necessary to increase the expansion capacity or increase the front pressure of the expander, that is, to increase the cooling capacity. Due to the increase in expansion, the amount of air entering the lower tower decreases, resulting in a decrease in the heat load of the condenser evaporator and a relative decrease in the evaporated liquid oxygen, manifested as an increase in the liquid oxygen surface; If the expansion does not change, but only increases the unit cooling capacity, that is, increases the temperature before expansion (reduces the bypass flux), it will inevitably increase the cooling amount released by the circulating gas in the switching heat exchanger, reduce the energy (enthalpy value) of the positive flow air entering the tower, and also reduce the heat load of the condenser evaporator, reduce the evaporation of liquid oxygen, and increase the liquid oxygen surface. Therefore, the excess cold energy is transferred to the tower through the heat exchanger, rather than accumulated through the condenser evaporator.
DEAR Air Separation has long-term experience in production, design, technology, and equipment manufacturing in the air separation industry. It has detailed research and regulations on equipment requirements and safety precautions to ensure the safe operation of air separation equipment.
