Large air separation unit manufacturers

The air contains a small amount of water vapor, carbon dioxide, acetylene, hydrocarbon and a little dust and other impurities. It will be very dangerous to let these impurities enter the air separation plant. Solid impurities will wear the device, especially threatening the safe operation of high-speed rotating equipment. Bringing them into the heat exchanger will also pollute the surface of heat transfer, reduce the heat transfer effect; steam and CO2 will freeze and precipitate in succession under the condition of low temperature, thus blocking the gas Channel and the sieve hole of the tower plate; the accumulation of acetylene and hydrocarbon tables in the distillation column is excessive, it is easy to trigger explosion. Therefore, in order to improve the safety, reliability and economy of the unit operation, the air must be purified.

Molecular sieve is a kind of crystal of siovenate, which has many micropores with uniform aperture size. The skeleton is usually negatively charged, and there is a cation in the pore channel that balances the negative charge of the skeleton. The earliest molecular sieve found was natural zeolite. People found that the ore exploited near the crater would produce bubbles after heating, so it was called zeolite. In 1930s, United Carbide Company of the United States firstly artificially synthesized 4A and 13X molecular sieves, and applied the molecular sieves as desicides in petrochemical industry. Later United Carbon Company successively discovered Y-type molecular sieve and applied it to the catalytic field, replacing the previous application of silicon-aluminum balls, which increased the gasoline production rate by more than 15%. At that time, the world's annual crude oil consumption was 400 million tons, and generate economic benefits of 8 billion dollars. Later, a series of molecul...