Large air separation FAQ

I. The basic principle of membrane separation and oxygen generation the study of gas's mass transfer process in membrane has a history of more than 100 years. People have conducted a lot of studies on single gas's transmission in polymer and membrane, thus, it has gained better development in theory. However, the application of membrane in practice has been a matter of recent decades, and a more prominent example is the separation of isotopes from nuclear weapons. It was not until the late 1970s s that the permeability and selectivity of gas in polymer membrane had developed to be of industrial economic value that membrane was widely applied like today. Generally speaking, the membrane can permeate all the gas, but the extent of permeation is different. Gas penetrates through the hollow polymer membrane, which is a complex process. Its penetration mechanism is generally that gas molecules are first absorbed on the surface of the membrane to dissolve, and then spread in the membrane,...

1 The condensing evaporator connected with the upper and lower towers arranges multiple plate units in a single layer, or adds auxiliary condensing evaporator to the tower. This kind of layout is the most conventional one, which is convenient to install, simple to arrange the pipeline, and also saves more space. 2 separately arranged condensing evaporator place multiple plate units in a cylindrical container in parallel, and connect them with upper and lower towers by pipes, which is a separately arranged condensing evaporator. This kind of structural form condensing evaporator is separated from the upper and lower towers, which is not limited by cross section, but increases equipment investment cost and pipeline configuration. 3 Multi-layer or double-layer condensing evaporator arrange multiple Plate-fin Heat Exchanger (main cooling unit) according to the upper and lower layers, and arrange them between the upper and lower towers, make the limited section layout as large as possibl...

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In use to avoid making the instrument one-way force, especially when driving and parking to pay attention to. When driving, you should first close the high and low pressure valves, then open the equalization valve, and then slowly open the high (or low) pressure valve, so that the measured medium enters the positive (negative) pressure chamber of the transmitter. If the liquid is measured, the gas in the positive (negative) pressure chamber should be discharged from the upper exhaust screw hole;...

A pressure relay is also known as a pressure switch. Its function is to cut off or switch on the current when the pressure is above or below a specified value to provide an alarm. The structural principle is that an elastic element (such as a bellows) works with a spring, and when the pressure increases (or decreases) to a specified value, it is transmitted to the micro switch through a lever mechanism, which turns the switch on or off to provide an alarm.DEAR air separation production of large ...

In order to consume the work of the turbine expander when required, to control the speed, to maintain the expander at its maximum efficiency point and to prevent the turbine from flying, turbine expanders are equipped with braking devices. There are three forms of braking commonly used on turbine expanders, namely pneumatic, motor and booster brakes. Most large oxygen generators use motor brakes, while booster brakes are a more advanced form of braking, which can recover the work of the expander...