Over the past century, coal-fired power has served as the "ballast stone" for industrialization and urbanization, boasting advantages of stability, low cost and controllability. From early extensive combustion, it has gone through three major stages: large-scale expansion, technological upgrading and environmental protection renovation. Each transformation has injected powerful momentum into industrial development.
Faced with these severe challenges, developing efficient, stable and economical desulfurization technology has become an inevitable path for the sustainable development of the coal-fired power industry. The foundation of all this lies in the preparation of high-quality desulfurizers.
Environmental acidification
Equipment corrosion
Health hazardsThe selection of desulfurization processes is directly related to pollutant control effects and production operation costs. After years of technological iteration and practical verification, the current mainstream desulfurization processes have formed a relatively mature technical system, with wet desulfurization and dry desulfurization as the two core categories.
Limestone-Gypsum Wet Flue Gas Desulfurization (FGD): As one of the most widely applied desulfurization processes currently, its principle is to use limestone slurry as the absorbent. The slurry fully contacts flue gas in the absorption tower, where sulfur dioxide (SO₂) in the flue gas undergoes a chemical reaction with limestone to produce calcium sulfite, which is then oxidized to form gypsum.
CFB Circulating Fluidized Bed In-Furnace and Out-of-Furnace Desulfurization Process: It adopts circulating fluidized bed combustion technology. Limestone powder is injected into the combustion zone in the furnace, and calcium oxide produced by the thermal decomposition of limestone reacts with SO₂ for preliminary desulfurization. Outside the furnace, a circulating fluidized bed reactor is used to further conduct deep desulfurization with fine-grained limestone powder.
High desulfurization efficiency
Mature technology
Wide application range
Utilizable by-products
Significant environmental benefits
Improve production efficiency
Save investment costs
Reduce site and labor requirements
Stable system operation
Excellent environmental benefits
Wide source availability
Low cost
High desulfurization efficiency
Stable desulfurization performance
Comprehensive utilization of products
Minimal corrosion to equipmentLimestone powder as a desulfurizing agent has significant advantages
Desulfurization efficiency is directly related to the specific surface area of limestone powder, and particle size distribution is the key parameter determining the specific surface area: Wet desulfurization: Limestone powder is required to have a fineness of 90% or more passing through 250 mesh. Circulating fluidized bed (CFB) in-furnace and out-of-furnace desulfurization: Desulfurizing agent limestone powder requires a fineness of 1mm - 0.045mm (for in-furnace desulfurization) and 0 - 0.045mm (for out-of-furnace desulfurization).
Mining
Crushing
Grinding
Classification
Collection
The preparation of high-quality limestone desulfurizing agent is a complex project involving material properties, grinding processes and system integration. Based on years of experience in grinding equipment R&D, SBM has designed a complete set of grinding process solutions tailored to the special requirements of limestone powder production for desulfurizing agents.
Fineness: 80–325 mesh Capacity: 3–50 T/H
Energy-Saving & High-Efficiency·Intelligent Operation·Superior Finished Products
Fineness: 80–400 mesh Capacity: 10–340 T/H
Multi-Functional in One Machine·Low-Carbon & Dust-Free·Superior Finished Products
Raw material: Limestone
Main equipment: MTW175G (4 units)
Processing capacity: 400,000 tons/year
Raw material: Limestone
Finished powder use: power plant desulfurization
Main equipment: 2 MTW trapezoidal mills
Raw material: 0-12mm limestone (CaO>81.6%, humidity <0.1%H2O)
Finished powder use: power plant desulfurization
Main equipment: MTW138 European version trapezoidal mill (3 sets)
Processing Material: Limestone
Finished Product Application: Power Plant Desulfurization
Equipment: LM Vertical Roller Mill
