At the initial start-up stage of the air separation equipment, all parts of the device are at room temperature, and it is necessary to gradually lower the temperature of each part of the device through refrigeration to achieve the low-temperature environment required for normal operation. At this time, the throttling effect refrigeration capacity is mainly used for cooling devices, including cooling fractionation towers, heat exchangers, pipeline valves, etc., to gradually reach the required low temperature state.
As the temperature decreases, water vapor in the air condenses into liquid water and further accumulates the liquid required for distillation inside the tower. In this process, the throttling effect also plays a key role in cooling capacity, which helps to promote the generation and accumulation of liquid air, providing necessary liquid raw materials for the subsequent distillation process of the air separation equipment.
There will be various cooling losses during the operation of air separation equipment, and the throttling effect cooling capacity can be used to compensate for these cooling losses, ensuring the stable operation of the air separation equipment.
In an air separation system, the sum of the throttling cooling capacity and the expansion mechanism cooling capacity constitutes the total cooling capacity of the system. By adjusting the opening of the throttle valve, the cooling capacity of the throttling effect can be controlled, thereby regulating the cooling balance of the system. When the system has excess cooling capacity, the opening of the throttle valve can be appropriately reduced to decrease the throttling effect on the cooling capacity; When the cooling capacity of the system is insufficient, the opening of the throttle valve can be increased to increase the cooling capacity of the throttling effect. This can keep the cooling capacity of the system within a relatively stable range, ensuring the normal operation of the air separation equipment.
By properly designing and optimizing components such as throttle valves and heat exchangers, the refrigeration capacity of the throttling effect can be fully utilized, and the refrigeration efficiency and performance of the air separation equipment can be improved.
