Knowledge

In addition to oxygen, nitrogen, and hydrogen, air contains trace amounts of rare gases such as neon, helium, krypton, and xenon. By volume fraction, neon accounts for approximatel

In addition to certain purity requirements for medical oxygen (99.5% oxygen purity for the cryogenic process), the moisture content must not exceed a dew point temperature of -43°C

Environmental conditions include atmospheric pressure, ambient temperature, atmospheric humidity, and the content of impurities such as CO₂ in the air. These conditions vary with r

Distillation columns are generally classified into two major categories: sieve-tray columns and packed columns. Packed columns are further divided into random (dumped) packing and

The liquid oxygen internal compression process, by contrast, extracts liquid oxygen product from the condenser-reboiler (main condenser). This liquid oxygen is compressed to the re

Since the 1990s, several mature advanced oxygen production technologies have been applied to small-scale air separation units. These innovations reduce cold loss, improve efficienc

the liquid oxygen internal compression process

In small-scale air separation units, what causes the decline in oxygen and nitrogen yield and purity, or even complete failure to produce oxygen?

When producing liquid products, the cold energy (Q₀) contained in the liquid is directly removed from the unit. To maintain cold balance, the unit must generate an equivalent amoun

Low-temperature air separation equipment generally consists of four main sections: air compression and expansion refrigeration; removal of moisture and impurities from air; heat ex

fill the cold box with inert gas during the operation of an air separation unit

The liquid air and liquid oxygen from the lower column serve as feedstock for the upper column distillation. Therefore, lower column distillation forms the foundation of upper colu