Purification engineering is a rapidly evolving field that combines advanced technologies to create controlled environments for various industries. It plays a crucial role in maintaining high levels of cleanliness, particularly in sectors such as electronics, pharmaceuticals, aerospace, and biotechnology. The core components of purification engineering include air and water purification systems, contamination control, and environmental monitoring. These technologies ensure that sensitive processes, like semiconductor manufacturing, can operate without interference from particles or impurities.
As the demand for microelectronics continues to grow, especially in China, the need for advanced purification technology becomes more pressing. During the "Ninth Five-Year Plan," China focused on developing its information industry, with microelectronics at the forefront. This has highlighted the importance of cleanroom technology and the level of purification engineering as a key indicator of a country’s technological and industrial advancement.
With rising living standards, people are increasingly concerned about their environment and health. High-purity water produced by water purification equipment has become a common household item, showing how purification technology is now entering everyday life. This shift marks a significant milestone in the evolution of clean technology, making it more accessible and essential for modern living.
Despite progress, there is still a gap between China’s purification technology and that of leading countries. For instance, HEPA filters were developed 15 years later in China compared to other nations, and similar delays occurred with dust particle counters. While advanced countries have already mastered 0.1-micron purification technology, China is still in the early stages of development. This gap highlights the need for continued investment and innovation in this critical area.
To meet the growing demand for ultra-clean environments, research into high-efficiency filters has been ongoing. In the U.S., companies like AAF and Flanders have commercialized 0.1-micron ULPA filters, which are widely used in cleanrooms. Japan has also become a major producer of these filters, offering a range of products including low-pressure loss models. Despite this, China still relies heavily on imported 0.1-micron ULPA filters for advanced applications, indicating a need for domestic technological breakthroughs.
The construction of cleanrooms in China lags behind that of developed countries. While Japanese companies built over 700,000 square meters of cleanrooms between 1982 and 1987, China's total cleanroom area during the same period was much smaller. However, China has made notable progress, with cleanroom construction increasing significantly in recent years. The cost of building ultra-clean rooms remains high, with Class 10 cleanrooms costing over $10,000 per square meter, which limits large-scale production in some areas.
International markets for purification technology are vast, with Japan and the U.S. leading in sales. China’s market, while smaller, is growing rapidly due to advancements in industries like semiconductors, optical fibers, and biotechnology. With an annual growth rate of 40% to 50%, the potential for clean technology in China is immense. As the country continues to invest in high-tech sectors, the demand for advanced purification solutions will only increase, driving further innovation and development in the field.
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