Incorporating digestion and absorption into the industrial model, Kaifeng Air Subsidiary has made significant strides in aligning with international standards and achieving localization for large-scale air separation plants. By thoroughly analyzing the technological gaps between Chinese and foreign manufacturers, the company focused on enhancing its R&D capabilities. It adopted advanced process simulation software, successfully digesting, absorbing, and further developing these tools. This effort significantly improved the calculation and design levels of its air separation equipment, laying the groundwork for domestic production of large-scale air separation systems.
In addition to process simulation, the company introduced NREL turbomachinery design, ternary impeller design, and manufacturing technologies, along with key processing equipment. These innovations greatly enhanced the design and manufacturing quality of turbine components, acting as a catalyst for overall technological advancement.
After achieving initial success, Kaifeng Air Subsidiary did not rest on its laurels. Instead, it set higher goals for itself by introducing dynamic process simulation, stress analysis software, and various computational tools for individual equipment, pushing its development capabilities to new heights.
Over the years, Kaifeng Air Sub-Group has consistently prioritized technological innovation, especially since the 1990s when it accelerated its R&D efforts. In the early 1990s, it collaborated with Tianjin University to explore the use of structured packing in distillation towers. After extensive research, the company designed a structured packing system for the upper tower of a 3200m³/h air separation plant, which was successfully launched in October 1995. Following data analysis and optimization, the technology was applied to an argon separation system, leading to the successful launch of a hydrogen-free argon production system in November 1997. This marked the beginning of a completely distillation-free hydrogen production method in China.
The 6000m³/h air separation plant, equipped with this advanced technology, won the National Excellent New Product Award. The adoption of structured packing distillation towers and fully refined argon technology revolutionized the air separation industry in China, reducing energy consumption and increasing argon output. This innovation fueled the growth of high-quality steel smelting and argon-related technologies.
Internal compression process air separation equipment has gained popularity due to its safety and high product purity, becoming the global standard for large-scale systems. Kaifeng Air Subsidiary began developing internal compression systems for 15,000m³/h units in 1995, launching them in 1998. With continuous improvements, the company developed a range of internal compression systems at different pressure levels, reaching internationally advanced standards. The first domestically produced 40,000m³/h air separation unit, operating at 8.5 MPa, became a critical milestone for China's large-scale air separation industry.
To this day, structured packing towers, full-refining argon systems, and internal compression processes remain the most widely used technologies in the global air separation sector. As such, Kaifeng Air Subsidiary has played a pioneering role in advancing China’s air separation industry.
Continuing its journey, the company explored new paths for corporate reform. With support from the municipal party committee and government, it completed the transfer of state-owned assets on November 8, 2004. Today, the restructured Kaifeng Air Subsidiary Group presents a fresh image. Guided by the philosophy of "integrity, excellence, efficiency, and innovation," the company remains committed to technological advancement, striving to reach new heights in the air separation equipment manufacturing field.
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