How are the left and right sides of the crude argon condenser distinguished?

:):):) To learn and apply what one has learned from time to time – isn’t that delightful?

The crude argon extraction process using Liquefied Air as a cooling source generally comes in two types, depending on the amount of Liquefied Air available: in one type, all the Liquefied Air from the lower column is sent to the crude argon column condenser; part of this Liquefied Air evaporates, and the vaporized Liquefied Air as well as the unevaporated portion are sent back to the upper column. This type of process is known as the full reflux type; it is characterized by sufficient cooling capacity in the crude argon column condenser and a large temperature difference across the condenser. However, it results in high liquid air evaporation rates, which has an impact on the distillation conditions in the upper column. Another approach is to throttle a portion of the liquid from the lower column and return it directly to the upper column ； In another section, the crude argon column condenser is used; most of the liquid air evaporates, while the liquid air vapor along with a small amount of unevaporated liquid air is returned to the upper column. This process is known as the semi-recirculation type; it features the ability to ensure the proper operation of the crude argon column while reducing the impact on the distillation conditions in the upper column. However, it has a small temperature difference in the condenser, and it is currently the commonly used process for extracting crude argon. Both of the aforementioned types of crude argon extraction processes share one common feature: the liquid air in the crude argon column condenser, just like the liquid oxygen in the main condensation evaporator, needs to be in a flowing state to prevent hydrocarbons in the liquid air from accumulating within the condenser. The liquid air return flow rate in switching-flow air separation units is approximately 10% of the liquid air amount required by the crude argon column condenser, while it is about 2% in molecular sieve adsorption flow air separation units. Changes in the liquid-air return flow rate can cause variations in the condenser temperature difference; for example, when the liquid-air return flow rate is 2%, the condenser temperature difference is approximately 1.3 K, while when it increases to 10%, the condenser temperature difference can rise to around 2 K. This is because an increase in the liquid-air reflux flow leads to an increase in the low-boiling nitrogen components in the reflux liquid air, which reduces the average temperature on the evaporation side of the liquid air. As a result, the temperature difference across the condenser increases, the heat load rises, the resistance in the crude argon column increases, and the oxygen content in the crude argon decreases. Therefore, adjusting the liquid-air return flow rate can serve as an important means for regulating the heat load of the crude argon column condenser. For the full reflux crude argon extraction process, all the liquid air must be returned to the upper column, and its flow rate is uncontrollable. In the semi-regenerative crude argon extraction process, only a small portion of the liquid air returns to the upper column; therefore, it is possible to install a liquid air control valve on the pipeline for liquid air reflux, using this valve to regulate the amount of liquid air that returns. The air separation units designed by Linde and Hangyang are both equipped with a special constant-flow valve to control the amount of liquid returning. Under normal operating conditions, the constant flow valve is closed, allowing liquid air to return to the tower in a controlled amount through the two small holes on the valve head ； If necessary, the constant current valve can be slightly opened to adjust the liquid-air return flow rate.

Thank you, but it’s not what I need. For things like the cold oxygen side and nitrogen side, as well as the crude argon condenser, it’s the liquid air side and the crude argon side. As for the condensers and evaporators in the refined argon tower, how are the left and right sides described? I’d like to use a more professional way of expressing this

For a condensation evaporator, it is sufficient to determine the heat exchange media on both sides; in the case of a refined argon condenser, liquid nitrogen or liquid air is usually used as the cooling medium, while refined argon gas serves as the heating medium. The heat exchange equipment in the air separation cryogenic tank is all of the plate-fin type, so discussing \"left and right\" is meaningless~~