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Yixing Haina Environmental Protection Engineering Co., Ltd. was established in 1995 in Yixing, known as the "Capital of Environmental Protection Technology" in China. It has developed from a local workshop into a globally recognized well - known enterprise in the field of air pollution control.

The load of industrial boilers varies. However, most denitrification systems assume steady - state operation—this leads to low efficiency in nitrogen oxide (NOx) reduction during low - load periods.

With the development of decentralized energy—driven by biomass energy, waste - to - energy, and industrial cogeneration—the demand for compact, efficient, and affordable emission control systems is also increasing. Standard power - plant - level solutions are often too large, too complex, and too expensive for boilers under 130 tons per hour, which are common in food processing, textiles, and district heating. Haina specializes in this niche market.