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The largest domestic air compressor unit was born in Shenyang
On June 8, the reporter learned from Shenyang Blower Group that its H596 compressor unit, a large-scale 52,000 air separation unit developed and manufactured by the company, has successfully passed testing on its medium- and low-pressure cylinders. This unit is currently the largest air compression equipment in the country, marking a significant breakthrough in the development of large drum compressor units.
The air compressor is a critical component of the air separation system, which plays an essential role in industries such as oil refining, ethylene production, chemical fertilizers, coal chemical processing, and metallurgy. Recently, China's domestic 40,000 to 60,000 class air separation plants have achieved performance levels comparable to those abroad. With the slowdown in the steel industry over the past two years, the chemical industry is now emerging as the largest consumer of air separation equipment and industrial gases.
The H596 unit was specifically designed for Zhongyuan Dahua Company in Henan Province, intended for their 52,000 air separation project. It was one of the key "communist projects" last year and a major product for Shengu Turbine Company. The medium and low-pressure cylinders of this unit are over 5 meters tall and 25 meters long, with a rotor diameter of 1.2 meters. Each single cylinder weighs more than 50 tons. The size, complexity, and technological challenges involved in its design and manufacturing have made it a milestone in domestic press technology.
This air separation unit is set to be delivered to a methanol plant construction site in Zhongyuan Dahua, which has an annual capacity of 500,000 tons.
Currently, while many companies in China produce air compressors, only a few can design and manufacture compressors for large-scale air separation plants. Shenyang Blower Group and Shaanxi Drum are among the leading companies in this field. According to Liao Bin, Secretary General of the Gas Separation Equipment Branch of the China General Machinery Industry Association, the largest domestically produced air compressor currently in industrial use is for a 48,000 air separation unit. Units above 50,000 still face technical challenges and often require imports.
This is mainly because once the air separation unit exceeds 30,000, the design and industrial processes for the supporting compressors undergo significant changes. The larger the scale, the higher the technical demands and the greater the difficulty. Domestic air compressors still need improvements in efficiency and reliability. Therefore, the successful development of the H596 unit represents a major achievement for Shenyang Blower Group and marks a new stage in China’s efforts to achieve technological self-reliance in this critical area.