In response to the country's new environmental protection emission standards, many current deep desulfurization projects rely on simple methods such as spray layer addition or twin-tower cascading. However, meeting the 50mg/m³ standard for a 300MW unit can cost over 30 million yuan. The increased circulation pump head after renovation leads to higher system pressure, causing a sharp rise in power consumption of the draft fan and booster fan, resulting in high energy costs. Additionally, using magnesium-based additives significantly increases daily operating expenses, making it unsustainable for power plants. Traditional deep desulfurization techniques involving layered spraying are expensive, time-consuming, and inefficient, no longer meeting today’s market demands.
Developed by Professor Liu Dingping’s research team at South China University of Technology, the third-generation highly efficient desulfurization technology has overcome existing technical challenges. It eliminates the need for additional layers and costly additives, enabling compliance with the strictest national emission standards through simple engineering modifications. This technology offers lower investment, reduced operating costs, and a shorter construction period, achieving efficient flue gas desulfurization and technological upgrading.
The core principle of this advanced desulfurization technology involves the use of ultrasonic atomization, which reduces the desulfurizer particle size from the traditional 1500-3000μm down to 50-80μm. This cloud-like formation significantly increases the specific surface area, accelerating the desulfurization reaction. With patented atomization swirling and tangential arrangement, a fully mixed spray field is created within the desulfurization tower, ensuring maximum mass transfer between flue gas and desulfurizing agent. This leads to enhanced SO₂ absorption and reengineering of the flow field, enabling high-efficiency desulfurization under low liquid-to-gas ratios. The desulfurizer circulation rate drops from 77 to 3 times, reducing both the liquid-to-gas ratio and the power consumption of the circulation pump, thus addressing the long-standing issue of high energy consumption in deep desulfurization systems.
This technology brings five major innovations: the introduction of ultrasonic atomization into wet flue gas desulfurization, allowing for smaller particle sizes and more effective desulfurization; computer simulation for tailored desulfurization tower design, creating an optimized cloud flow field for high efficiency; unique anti-wear, anti-blocking, and self-purification technologies ensuring stable and efficient operation; a sound-absorbing patented design; and online maintenance capabilities that allow atomizer components to be replaced without shutting down the system.
With eight key advantages, this technology stands out: a small liquid-to-gas ratio due to cloud atomization and fewer cycles; ultra-fine particle size (50-80μm) for faster reaction rates; high desulfurization efficiency; low investment with a simplified system and no need for additional towers; reduced circulation pump power consumption (half of the traditional method); lower ventilation power consumption due to a 1/3 reduction in system differential pressure; a short construction period of just 10 days for standard renovations; and wide adaptability to various fuels, allowing power plants burning high-sulfur coal to meet stringent emission limits.
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Magnetic stirrer is a laboratory instrument used to mix liquids or solutions by stirring them continuously using a rotating magnetic field. It consists of a small magnetic bar or stir bar that is placed inside the liquid to be stirred and a magnetic field generator, usually a small motor, that rotates the magnetic bar at a controlled speed. The magnetic bar is usually coated with a non-reactive material such as PTFE (polytetrafluoroethylene) to prevent it from reacting with the liquid or solution being stirred. Magnetic stirrers are widely used in chemistry, biology, and other scientific fields for various applications such as mixing reagents, dissolving solids, and preparing samples for analysis. They are preferred over conventional mechanical stirrers as they are more efficient, do not cause contamination, and are easier to clean.
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