There are currently several types of distillation trays used in air separation towers, including sieve tray, bubble cap tray, and float valve tray.
There are evenly distributed small holes with a diameter of 0.8-1.8mm and a spacing of 2.1-3.25mm on the tray of the sieve tray tower. The vapor bubbles through the liquid layer through the sieve hole, and the liquid on the tray is supported by a certain vapor velocity, which can only flow along the tray in a certain direction. This type of tray is widely used due to its simple manufacturing, high efficiency, and adaptability to load changes. Its disadvantage is that when the load is too low, the liquid may leak through the sieve (called liquid leakage). When the intake is stopped, the liquid will pour down and all flow to the bottom. When restarting, liquid needs to accumulate again on the tray.
The bubble cap tray is a type of tower where steam enters the bubble cap through the riser and bubbles through the liquid layer through the teeth of the bubble cap. This type of tray has stable operation and a wide range of adaptability, but its structure is complex and equipment investment is large. In an air separation tower, it is generally only used for the first tray of the lower tower. This type of tray will not be blocked by carbon dioxide and can serve as a scrubber and distribute the airflow evenly. For an air separation tower with an argon tower, a section of the tray above the argon fraction extraction port is prone to liquid leakage due to reduced rising steam. In order to ensure stable operation, there are also alternative arrangements of bubble cap trays and sieve trays.
The float valve tray is composed of some float valves whose lifting height can vary with gas velocity. This type of tray has great adaptability to load changes. Due to the complexity of manufacturing, it is only used as the first washing tray in the air separation tower.
Kaifeng DEAR Air Separation has successfully independently developed a magnetic powered oxygen enrichment equipment and obtained utility model patents. It is widely used in the production of magnetic oxygen enrichment equipment and energy-saving and environmentally friendly industrial gas manufacturing equipment, greatly improving equipment stability, facilitating the collection of oxygen gas, increasing oxygen concentration, and preventing the mixing of oxygen and nitrogen. In the blast furnace oxygen enrichment gas distribution system project with Shandong Chuanyang Group Co., Ltd, We boldly applied it and achieved good results.
