Air separation argon system

To reduce the oxygen content at the top of Column I for crude argon, the separation efficiency can be improved by adjusting the operating parameters in the column, such as increasing the reflux rate at the top or reducing the feed temperature. When the liquid level at the bottom of Tower II for crude argon experiences large fluctuations, it is advisable to verify and adjust the liquid level control system to ensure its stability. The relationship between the oxygen content at the top of the tower and the liquid level at the bottom indicates that there may be an interaction between the two. It is recommended to take into account adjustments to the operating parameters, to monitor system changes closely, and to optimize the dynamic balance of the entire air separation argon system as a whole. .

First of all, it should be clear that the I and II settings for the argon tower should refer to one tower. It is because the connection point is too high, and due to the way materials enter and exit, that one tower has been divided into two sections. The main cause of these fluctuations is still the tracking lag of the self-regulating backflow valve that maintains liquid level balance. Try stabilizing it manually for a while to see if it improves. Additionally, during the operation, the oxygen concentration must be strictly controlled in accordance with the operating procedures. This is because too high an oxygen concentration causes the argon-rich zone to rise (with respect to the argon outlet). A common issue is the practice of maintaining an oxygen purity level that is higher than what is required by the process conditions, in order to have a safety margin to cope with fluctuations in product quality. For an oxygen content with a required purity of 99.6%, the higher the degree of proximity to this purity, the greater the level of control achieved. Otherwise, it is inevitable that other aspects will be affected; for reference only.