Large air separation FAQ

Why is the lowest temperature in the air separation tower lower than the outlet temperature of the expander

Labyrinth compressor

How to warm and defrost the air separation unit during normal shutdown

What are the arrangement methods of the cooler of the piston compressor used in the air separation unit

How to optimize the structure of equipment support in the cold box of air separation plant

(1) advantages and disadvantages of nitrogen cyclic pressurization internal compression process Linde company of Germany developed the first air separation equipment for the internal compression process of the liquid oxygen pump in 1970s. However, this 35100m3/h air separation plant used in a fertilizer plant in Navmada, India, is not a common one that uses the high pressure air produced by the Air booster as a heat source to vaporize the high pressure liquid oxygen in the main heat exchanger, instead, the nitrogen circulating booster is adopted to reheat the gas and nitrogen on the top of the pressure tower through the heat exchanger, and then compress them into high-pressure nitrogen through the nitrogen circulating booster. The high-pressure nitrogen enters the high-pressure heat exchanger to vaporize liquid oxygen, and it enters the pressure Tower again after being liquefied. Three years later, in 1979, Linde company provided 3 sets of 28000m3/h air separation plant for Zhejiang...

Part temperature of upper tower top

Blowing off is the operation of removing solid impurities and free water by the impact of airflow, and at the same time, it can also expel part of the heat and cold energy stored in the equipment. After installation and overhaul, the air separation unit is easy to remain solid impurities and water drops, so it should be blown away; when the unit is stopped, the cooling volume of the expelled part should be blown away, in order to expel part of the heat and further clear the water after the heating operation, it should also be blown out. There are roughly two blowing methods: continuous blowing and intermittent blowing. The so-called "continuous blowing-off" is the blowing-off method that always opens the blowing-off valve and lasts for a period of time. The so-called "Intermittent blow-off" means that the blow-off valve is closed and open at the same time. When it is closed, it is opened suddenly after holding high pressure, and it is repeated. This method has better effect on remov...

What are the configurations of the external compression process of the air separation unit

The correct operation method of air compressor: Air compressor is one of the main mechanical power equipment of many enterprises, so it is very necessary to keep the safe operation of air compressor. Strictly implementing the operation specification of the air compressor not only helps to prolong the service life of the air compressor, but also ensures the safety of the operators of the air compressor. Now let's learn about the operation specification of the air compressor. I. Before operating the air compressor, we should pay attention to the following problems: 1. Keep the lubricating oil in the oil tank within the scale range. Before the operation of the air compressor, check that the amount of oil in the oiling machine should not be lower than the scale value. 2. Check whether the moving parts are flexible, whether the connecting parts are fastened, whether the lubrication system is normal, and whether the motor and electrical control equipment are safe and reliable. 3. Before t...

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,...