The project titled "Development of Large-Scale Boiler Flue Gas Pneumatic Desulfurization Industrialization Technology," jointly developed by Yanshan Petrochemical and China Aerospace Science and Technology Corporation, has successfully passed the Sinopec technical appraisal on February 16. The evaluation highlighted that the technology is innovative and ranks among the world's most advanced solutions. It is expected to have broad application potential in the future.
Currently, Yantai Petrochemical is implementing this pneumatic desulfurization technology as part of a retrofit project for two 310-ton-per-hour circulating fluidized bed (CFB) boilers at the first thermal power station. This marks a significant step in adopting more efficient and environmentally friendly flue gas treatment methods.
This technology was first applied to the flue gas treatment system of a 220-ton-per-hour coal-water slurry boiler at Yanshan Petrochemical. Since its installation in September 2004, the desulfurization unit has operated continuously and smoothly for over 335 days. The industrial performance of the technology demonstrates several advantages compared to traditional air tower spray desulfurization systems. These include a larger gas-liquid contact area, a lower liquid-to-gas ratio, better mass transfer efficiency, and a higher flue gas purification rate with the same amount of absorbent. In addition to effectively capturing particulate matter, it ensures compliance with environmental discharge standards while significantly reducing operational costs.
According to the data, this technology can reduce sulfur dioxide emissions by approximately 1,800 tons annually and cut pollutant discharge-related costs by 1.137 million yuan.
Globally, the more established flue gas desulfurization technologies include the limestone-gypsum method, seawater desulfurization, spray drying, calcium spray humidification, and electron beam methods. While these imported technologies offer benefits such as extensive engineering experience, stable operation, and high desulfurization efficiency, they often require a higher liquid-to-gas ratio and are less effective in removing dust. They are also sensitive to the dust concentration in flue gases, leading to increased system circulation, higher power consumption, and elevated operating costs. Moreover, their dust emission levels may not always meet stringent environmental regulations.
Given these limitations, the pneumatic desulfurization technology presents a promising alternative, offering improved efficiency, cost-effectiveness, and environmental compliance. Its successful implementation and long-term stable operation make it a strong candidate for wider adoption in the industry.
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