Liquefied air separation FAQ

Make use of the difference of the volatile capacity of each component in the mixture, through the reflux of liquid and gas, make the gas and liquid two reverse multi-stage contact, under the constraint of the relationship of thermal energy driving and phase equilibrium, it makes volatile components (light components) transfer continuously from the liquid phase to the gas phase, while the volatile components migrate from the gas phase to the liquid phase, which makes the mixture separate continuously. This process is called rectification. In this process, the process of heat transfer and mass transfer is carried out at the same time, which belongs to the control of mass transfer process. Raw materials enter the tower from the appropriate position in the middle of the tower, and divide the tower into two sections. The upper section is the distillation section without feed, and the lower section contains feed plate as the retention section. The condenser provides liquid reflux from the...

What are the classification and manufacturing methods of copper tubes for oxygen pipelines of air separation plants

During the process of storage and transportation, the liquid storage tank should pay attention to: 1) the protective equipment and instrument of the storage tank should be in good condition; 2) during the process of storage and transportation, the storage tank should be well ventilated, and inflammable substances should not be stored around, no fire; 3) the filling rate of the storage tank is less than 95%, and it is forbidden to overfill or overpressure; 4) when there is liquid in the storage tank, it is forbidden to repair it by fire; 5) the equipment pipeline should be heated slowly when thawing, and do not freeze with overheated working medium or open fire; 6) wear protective gloves when contacting low temperature liquid to avoid direct contact between skin and low temperature liquid; 7) the transportation process should be smooth, and there should be no big bumps.

No matter in the starting working condition or in the normal operating condition, medium-voltage small air separation plant must pay great attention to the relationship between the working pressure of the process and the flow and expansion. The relationship between them should meet two conditions: one is to ensure the heat balance of the whole device and meet the demand of the equipment for cooling capacity; the second is to ensure that the second heat exchanger of the cold end of the main heat exchanger can work normally. The working pressure of the air separation plant will directly affect the isotherm throttling effect of high pressure air and the cooling capacity of the expansion machine. That is to say, in order to ensure the normal operation of the air separation plant, when the high pressure changes, the distribution ratio of the flow and expansion volume should be adjusted timely. If the operating pressure of the air separation plant rises, the isotherm throttling effect and...

How to operate and manage the rectification tower of air separation equipment

Enthalpy during oxygen production

Foundation of air separation tower

What matters should be paid attention to in the blowing out of air separation equipment pipes

What are the management and requirements for valve installation and maintenance of air separation equipment

Precautions for orifice plate installation

When replacing the working liquid in the liquid level meter, the positive and negative pressure inlet valves should be closed, and the equal pressure valve between the positive and negative pressure chambers should be opened so that the pressure difference between the two sides is zero, then the inlet cover should be opened to replace the liquid. Otherwise the working liquid inside the tube may be ejected under the action of the differential pressure. The type of working fluid contained inside s...

There are two types of differential pressure transmitters, electric and pneumatic. Here we only introduce the structure principle of pneumatic differential pressure transmitter, the role of differential pressure transmitter is to convert the differential pressure signal into 0.02 ~ 0.1MPa air pressure signal, for long-distance transmission, and to the display instrument display or record down.The measured pressure difference P1 and P2 are introduced into the positive and negative pressure chambe...