Since the invention of the variable pressure adsorption separation technique, it has been widely used for the separation and refinement of gas mixtures.
First, in 1958, Skarstorm patented and applied this technique to separate air. At the same time, Gerin de Montgareuil and Domine also filed patents in France. The difference between the two was that the Skarstorm cycle desorbed the bed after saturation with a partial low-pressure flushing of the light product fraction, whereas the Gerin-Domine cycle desorbed the bed by evacuation.
In 1960 a large industrialized plant for variable pressure adsorption air separation was built.
1961 Recovery of high-purity n-alkane solvents from naphtha by the variable pressure adsorption separation process was named the Isosiv process, and the process for recovery of n-alkanes from kerosene fractions was perfected in 1964.
The four-tower process plant for hydrogen extraction using variable pressure adsorption technology was completed in 1966, and after the 1970s, multi-tower operation with more than four towers was adopted and developed to large-scale and large-scale.
In 1970, an industrialized device was built to separate and recover oxygen, which was used for the biochemical needs of environmental protection industrial wastewater treatment. At the same time is widely used in the extraction of n-alkanes from naphtha, and then isomerization, the isomerization product into the gasoline fraction to improve its octane Hysomer process.
In 1975, a medical oxygen-enriched concentrator was made on a trial basis, and in 1976, the process of nitrogen production by variable pressure adsorption with carbon molecular sieves was developed and industrialized, followed by the use of a 5A zeolite molecular sieve vacuum nitrogen production process. In 1983, Germany introduced carbon molecular sieve with excellent performance for nitrogen production. By 1979, about half of all air dryers were using Skarstrom's Pressure Vaporization Adsorption (PVA) process. Pressure-variable adsorption is more effective than temperature-variable adsorption for drying air or industrial gases, and a rapid pressure-variable adsorption process (also known as parameter-pumped pressure-variable adsorption) was developed in 1980.
From the 1990s onwards, due to power constraints, VAROX has again found a place in areas such as steelmaking.
1-2-1 China's research on pressure adsorption oxygen technology
China's development of pressure adsorption oxygen technology started earlier, from 1966 onwards, the study of zeolite molecular sieve separation of air oxygen technology; in 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 technical strength of scattered, lack of liaison with each other. For more than 20 years, due to the dispersion of technical force and the lack of liaison between each other, the development of China's variable pressure adsorption oxygen technology is slow, and the gap with foreign countries is getting bigger and bigger. 1970s is the heyday of China's PSA separation air oxygen technology development, more than ten units have carried out experimental research on the variable pressure adsorption oxygen technology one after another, and several sets of industrial test equipment have been established. The ****similarities of the pressure adsorption oxygen generation equipment developed in this period are as follows:
(1) Most of them adopt higher-than-atmospheric-pressure adsorption and atmospheric-pressure desorption processes, and there are two to four adsorption towers;
(2) the air is pretreated with dehydration before entering the adsorption tower;
(3) the equipment is of poor reliability, and it cannot be continuously and stably operated, which leads to the scrapping of most of the equipment.
(4) Outdated technical and economic indicators.
In the 1980s, the development projects of the original units engaged in the research and development of pressure adsorption oxygen production equipment were suspended one after another, and the development of pressure adsorption oxygen production technology in China entered the trough again.
In 1995, the United States of America Jinxiu international enterprise group ELEGANT under the Kunshan Jinhu Machinery Co., Ltd. in Henan Luoyang Iron and Steel Works built VSAO-1000Nm3 / h oxygen generator (Note: publication "Metallurgical Equipment" has contained), marking the pressure adsorption in our country formally entered the industrial field, but also marked the pressure adsorption in our country into the period of high-speed development.
In 1994, the relevant leaders of Luoyang Iron and Steel took into account that the existing deep-cooling oxygen generator could not meet the requirements of the steel mill, and the disadvantages of the high failure rate, and at the same time, they realized that the variable-pressure adsorption oxygen generator had the advantages of fast startup, convenient operation, and low maintenance, which made them pay attention to this new type of oxygen generator. At that time, there was no sample project in China. In order to develop the domestic market, our company invited the relevant technical personnel of Luogang to visit CATHAY PACIFIC SKK STEEL, JAKARTA PRlMA and other overseas steel mills using our company's variable pressure adsorption equipment. After the delegation returned to China, they decided to put on a 1000Nm3/Hr Pressure Adsorption Oxygen Generating Equipment, except for the plant and civil engineering parts, which was general contracted by Jinhu Machinery Co. The equipment was successfully tested in May 1995, and all the measured indicators met the design requirements.
This project is the first transformer pressure adsorption oxygen generating equipment used in China's industrial field.
The 1990s was a period of rapid development of China's variable pressure adsorption oxygen technology, and the technology of variable pressure adsorption oxygen technology has gradually matured, and the comprehensive technical and economic indexes of some products have been close to the advanced level of foreign countries. Years of practice shows that China's variable pressure adsorption oxygen technology has stepped out of the laboratory into the practical stage. In the past ten years, through continuous technology updating and research and development, China's variable pressure adsorption oxygen technology is changing day by day and developing rapidly, and the gap between the world advanced level is shrinking. However, from the overall level, there is still a certain gap between China and the international advanced level in many aspects. For example, in the new high-performance adsorbent research, adsorption process improvement, theoretical analysis and research and mathematical modeling, quality monitoring and automation control and many other aspects.
KUNSHAN JINHU MACHINERY CO.,LTD.
KUNSHAN JINHU MACHINERY CO.,LTD. is subordinate to ELEGANT, which has six subsidiaries in different countries and specializes in the research and development, production and sales of PSA, VPSA oxygen adsorption equipment and molecular sieve. Our company is located in Kunshan City, Jiangsu Province, with beautiful scenery. Since its establishment in 1995, we have introduced advanced technology from Europe and the United States, and continuously created the precedent of industrialized application of pressure swing adsorption oxygen generation in various fields in China. We are one of the few enterprises in the same industry in China that have the system certification (ISO9001:2000 quality management system), "High-tech Enterprise Certificate" and "Top 100 High-tech Achievement Transformation Projects". In the field of core technology, our technical cooperation with Bayer of Germany for nearly 20 years and the impressive performance of exporting more than 3,000 tons of molecular sieves annually have defended our irreplaceable position in the field of oxygen production.
JINHU has a highly efficient technical team with strong independent research and development capability, which provides tailor-made solutions for our customers on the premise of introducing advanced technologies from Europe and the United States, and combining the characteristics of our own country's outdated industrial process and poor technological updating. Without any precedent, we broke through many difficulties and successfully realized the industrial application of the first set of variable pressure adsorption oxygen generating equipment in paper making and smelting fields in 1995, which provided valuable practical experience for our domestic counterparts. Positively and effectively promote the development and application of variable pressure adsorption oxygen generation equipment in China! Following this, we are more in the higher technical requirements of the pulp bleaching field alone. With the world environmental protection bell ringing, and respond to the national "energy saving and emission reduction" call. We not only need to provide valuable technology and products for the gas resource field to promote the development of industrial civilization, but we also desire to have blue water and blue sky. Therefore, while learning from the advanced experience of foreign countries, JINHU strengthens the close cooperation with domestic universities, design institutes and domestic leading enterprises, and opens up many paths in the field of variable pressure adsorption oxygen generation. Our diversified products are involved in various industries such as papermaking, metallurgy, non-ferrous metals, environmental protection, chemical industry, medical treatment, aquaculture, glass and so on. At present, Jinhu VPSA oxygen generation equipment is in short supply in both domestic and overseas markets, and our products are exported to the United States, Myanmar, Taiwan, the Philippines, Indonesia and other places. The good market positioning and high quality assurance have established Jinhu's significant position in the oxygen industry.
JSH will, as always, inherit the culture of love, fulfill its social responsibility, cultivate scientific and technological talents, innovate the mode of development, and challenge the higher goal of scientific and technological innovation and transformation of the industry, to create the evergreen greatness of "long-term, stable, development, science and technology, and international" one of the first-class companies!