Does anyone know the history of large medical oxygen generators? The more detailed the better!

Large hospital oxygen supply generally use medical molecular sieve oxygen generator. Medical molecular sieve oxygen equipment to air as raw material, molecular sieve as the adsorbent, through the variable pressure adsorption method (PSA), at room temperature and low pressure conditions, the use of molecular sieve pressurized nitrogen (adsorbent) adsorption capacity of the air increased, the decompression of nitrogen adsorption capacity of the air decreased characteristics of the formation of pressurized adsorption, decompression desorption of the rapid cycle of the process, so that the oxygen and nitrogen in the air can be separated. The carbon dioxide, gaseous acid and other gaseous oxides in the air are substances with strong molecular polarity, which are difficult to pass through the molecular sieve, so that the purity of the output oxygen reaches 93% ±3% or more.

The first "molecular sieve" oxygen generator, the earliest is the German Linde company manufacturing, almost 100 years ago.

China's development of pressure swing adsorption (PSA) oxygen technology started earlier, from 1966 to study the zeolite molecular sieve separation of air oxygen technology; the 1970s PSA separation of air oxygen in the iron and steel, smelting and glass kilns and other industrial areas have been widely used. 20 years, due to the dispersal of the technical force, lack of liaison between each other, the development of our pressure swing adsorption technology is slow.

The 1970s was the heyday of China's PSA air oxygen technology development, more than a dozen units have carried out experimental research on pressure adsorption oxygen technology, and several sets of industrial test equipment have been established.

In the 1980s, the original unit engaged in the development of pressure adsorption oxygen generation equipment development projects have been suspended, the development of China's pressure adsorption oxygen generation technology has once again entered a trough.

In 1995, Kunshan Jinhu Machinery Co., Ltd. built a VPSAO 1000Nm3/h oxygen generator in Henan Luoyang Iron and Steel Factory, which marked the formal entry of variable pressure adsorption into the industrial field in our country, and also marked the high speed development period of variable pressure adsorption in our country.

The 1990s was a period of rapid development of VPSAO technology in China, and the technology of VPSAO gradually matured, and the comprehensive technical and economic indexes of some products have been close to the advanced level of foreign countries.

Oxygen generator host for the beginning of the single-tower structure, which is often referred to as a generation of machines, a generation of machines, oxygen production efficiency is low, can not circulate the oxygen, noise, covers an area of a wide range of the need for pressure vessel license, the current single-tower oxygen generator host has been basically withdrawn from the market. With the continuous progress of science and technology, double-tower and multi-tower structure (second generation) of the oxygen host has been basically popularized, its oxygen production process than the first generation of the machine has many improvements, can intermittent cycle of oxygen, but still need to apply for a pressure vessel certificate. Hunan's TerraMed is the first in China to launch the third generation of intelligent modular oxygen generator, both in terms of the concentration of oxygen production and accuracy, have been greatly improved over the first and second generation of the machine, and can asymmetrically uninterrupted cycle of oxygen production, low noise, small footprint, and do not need to apply for a pressure vessel certificate.

With the continuous development of molecular sieve oxygen technology, the national policy of standardization and support, large medical institutions have basically used molecular sieve oxygen generator oxygen supply, I believe that in the future the use of molecular sieve oxygen generator will become more and more widespread. I hope it will be helpful to you.