The project titled "Development of Large-Scale Boiler Flue Gas Pneumatic Desulfurization Industrialization Technology," developed jointly 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 highly innovative and represents an international advanced level. Experts believe that this technology holds great potential for future promotion and application in industrial settings.
Currently, Yantai Petrochemical is implementing the 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 forward in the company’s efforts to improve environmental performance and reduce emissions.
This technology was first introduced at Yanshan Petrochemical for flue gas treatment of a 220-ton-per-hour coal-water slurry boiler. Since its installation in September 2004, the desulfurization unit has operated continuously and smoothly for over 335 days. The results from industrial applications demonstrate several advantages compared to traditional spray tower desulfurization methods. 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 removing particulate matter, it ensures compliance with environmental discharge standards while significantly lowering operational costs. It can reduce sulfur dioxide emissions by approximately 1,800 tons annually and cut pollutant discharge costs by about 1.137 million yuan.
Globally, more established flue gas desulfurization technologies include the limestone-gypsum method, seawater desulfurization, spray drying, calcium spray humidification, and electron beam methods. While these technologies are well-established and widely used, they often come with limitations such as high liquid-to-gas ratios, poor dust removal efficiency, and sensitivity to flue gas dust concentration. Their operation can lead to significant system circulation, increasing power consumption and operational costs, and sometimes failing to meet strict environmental emission requirements. As a result, the newly developed pneumatic desulfurization technology offers a promising alternative with improved performance and cost-effectiveness, making it a strong candidate for broader adoption in the industry.
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