What are the unique advantages of desulfurization and dust removal projects for treating flue gas from steel sintering plants?
Publish Time: 2025-10-23
The steel industry is a key area for industrial pollution control. The sintering process, a key link in the steel production chain, produces flue gas characterized by complex composition, high flow rates, high sulfur content, and high dust concentrations, making it a major source of atmospheric pollutants in steel plants. With increasingly stringent national environmental protection standards, traditional single-step dust removal systems are no longer sufficient. Integrated desulfurization and dust removal projects have emerged as a core solution for sintering flue gas treatment. By integrating advanced process technologies and system design, this project demonstrates unique advantages in the steel industry.1. Addressing complex flue gas composition and achieving synergistic control of multiple pollutantsSintering flue gas contains a variety of pollutants, including sulfur dioxide, nitrogen oxides, particulate matter, heavy metals, and dioxins. Traditional treatment methods often involve separate, step-by-step treatment processes, resulting in low efficiency and large space requirements. Modern desulfurization and dust removal projects utilize advanced technologies such as activated carbon adsorption, circulating fluidized bed semi-dry or wet desulfurization combined with high-efficiency bag/electrostatic bag dust removal to achieve simultaneous and efficient removal of SO₂ and particulate matter. Some technologies can also remove NOx and dioxins simultaneously, truly achieving "one tower, multiple functions," and significantly reducing total pollutant emissions.2. High-efficiency purification, ensuring stable and standard emissionsHigh-quality desulfurization and dust removal systems can achieve a sulfur dioxide removal rate of over 90%. For example, limestone-gypsum wet desulfurization combined with wet electrostatic precipitators (ESPs) offers high desulfurization efficiency and stable operation. The addition of wet electrostatic precipitators at the end of the process effectively captures fine dust and droplets, preventing the "gypsum rain" phenomenon. For water-scarce areas, circulating fluidized bed semi-dry desulfurization combined with bag dust removal can be used, saving water and energy while maintaining high purification efficiency.3. Resource utilization, promoting a green circular economyDesulfurization and dust removal projects not only reduce pollution but also focus on recycling by-products. For example, the desulfurized gypsum produced by wet desulfurization can reach a purity exceeding 90% after dehydration. This can be used as a cement retarder or building material, effectively turning waste into valuable resources. Activated carbon regenerated through activated carbon adsorption can be reused, and saturated ash can be used as sintering ingredients. This resource-recycling approach reduces waste disposal costs, improving the project's economic viability and sustainability.4. Strong adaptability, compatible with diverse scales and operating conditionsSintering machine flue gas is characterized by large flow rate fluctuations, frequent temperature changes, and high oxygen content. The modular design of the desulfurization and dust removal system allows for flexible configuration of processing capacity based on the size of the sintering machine. The system is equipped with an automatic adjustment device that responds in real time to changes in flue gas volume and pollutant concentration, ensuring stable operation even under low load or abnormal operating conditions. Furthermore, the equipment is constructed of corrosion-resistant materials to extend its service life and adapt to harsh environments with high humidity and high chlorine content.5. Intelligent Control Improves Operation and Maintenance EfficiencyModern desulfurization and dust removal projects generally integrate DCS/PLC automatic control systems, automating the entire process, including desulfurizer dosing, air volume adjustment, cleaning frequency, and pH control. Intelligent alarm and fault diagnosis functions help operations personnel quickly identify problems, reduce downtime, and ensure continuous operation of the sintering production line.6. Supporting Enterprise Green Transformation and Compliance DevelopmentWith the advancement of the "Dual Carbon" goals, steel companies face tremendous environmental pressure. Implementing desulfurization and dust removal projects is not only a necessary measure to meet environmental regulations but also a key manifestation of corporate social responsibility and brand enhancement. Through ultra-low emission retrofits, companies can apply for Class A environmental performance ratings, enjoy uninterrupted production during periods of heavy pollution, and enhance their market competitiveness.In steel sintering flue gas treatment, desulfurization and dust removal projects, with their unique advantages such as high-efficiency purification, multi-pollution coordination, resource recovery, intelligent operation and maintenance, and strong adaptability, have become a key support for the industry's green upgrade. They not only help companies overcome environmental bottlenecks but also provide a reliable technical path to achieve clean production, energy conservation and emission reduction, and sustainable development. In the future, with the integration of process optimization and digitalization, desulfurization and dust removal technology will play a more important role in the low-carbon transformation of the steel industry.
