After years of development, domestic air separation units have developed from small-scale air separation units to large-scale air separation units. The technology of air separation units has developed synchronously with the development of the iron and steel industry. Different historical stages have different requirements for the selection of air separation units. The main characteristics of oxygen consumption of contemporary iron and steel are:
(1) Although it changes from time to time, the total oxygen consumption can be calculated according to the specification and smelting level of the converter, which is converted into the oxygen consumption per hour. The gas pressure in the peripheral comprehensive pipe network is higher than the final gas consumption point pressure, and is sent to the user through the pressure regulating station as the oxygen for oxygen enriched coal injection of the blast furnace. The average consumption is basically the average consumption, so the gas consumption of the whole enterprise can be calculated, Which is the basis for selection of air separation unit.
(2) The oxygen used by iron and steel enterprises is mainly gaseous. At present, the air separation unit is mainly divided into internal compression and external compression according to the formation process of gas oxygen products. The newly-built iron and steel enterprises do not have the sales channels and sales experience of liquid and gas, so the liquid volume of the products of the air separation unit is small, and at this time, there are generally more external compression processes.
In the south, Southeast, East, northeast and central China, due to the relatively good industrial foundation and large gas consumption, especially those iron and steel enterprises with air separation units have generally felt the benefits of gas and liquid sales, so the new air separation units are considered to carry a large amount of liquid. Under such circumstances, deer air separation will have a variety of process design options for the supplier and demander.
