Large air separation FAQ

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...

The principle of the electric motor braking expander is to use the braking torque generated by the generator braking state of the motor to control the speed of the expander, if the braking motor fails, the expander speed will be out of control and it will overspeed. At this time, it is necessary to automatically open the protection control system, the method is that the speed measuring motor will send the overspeed signal, so that the three-way solenoid valve power off, the three-way solenoid va...

When the large air separation unit needs to be temporarily stopped due to various faults, the following steps are to be followed.Stop the operation of each product compressor; stop the operation of the booster turbine expansion unit; stop the operation of the medium-pressure liquid oxygen pump; stop the operation of the medium-pressure liquid argon pump; stop the operation of the booster compressor unit; switch the instrument air system to the standby pipeline; open the air turbine compressor ou...