I. Core Technical Features
(1) Calcium-based desulfurization: Calcium-based desulfurization uses limestone or lime as an absorbent to remove sulfur dioxide from flue gas. It is a widely used and mature flue gas desulfurization technology. This method is mature, reliable and cost-competitive, making it the preferred choice among mainstream desulfurization solutions.
(2) Sodium-alkali desulfurization: Sodium-alkali desulfurization uses sodium hydroxide or sodium carbonate as an absorbent to remove sulfur dioxide from flue gas. It is a wet flue gas desulfurization technology with high desulfurization efficiency. However, sodium alkali is expensive, so its operating costs are higher than those of calcium-based methods. It is suitable for small desulfurization projects with land constraints.
(3) Steel slag desulfurization: Steel slag desulfurization is a technology pioneered by Taiji Environmental Protection. It uses steel slag powder as an absorbent to remove sulfur dioxide from flue gas, with the core concept of "treating waste with waste." This technology deeply integrates the concept of source reduction: on the one hand, it consumes steel slag, a steel solid waste, reducing at the source the ecological damage and carbon emissions caused by mining (traditional calcium-based methods require limestone mining); on the other hand, it further reduces pollutants in flue gas during desulfurization, forming a closed loop of source reduction — process treatment — end-of-pipe resource recovery. Compared with calcium-based desulfurization, the steel slag method has extremely low absorbent costs, significantly consumes solid waste, achieves carbon reduction, and yields by-products that can be used for soil improvement or as raw materials for building materials. It is a desulfurization process with distinct circular economy characteristics, representing a shift in thinking from traditional resource consumption to solid waste utilization.
II. Desulfurization Tower Materials Available
(1) Plastic tower
(2) FRP tower
(3) Stainless steel tower (2205 duplex stainless steel, 316L, etc.)
(4) Carbon steel tower with glass flake lining
III. High-Concentration Sulfur Dioxide Flue Gas Treatment
Built on Taiji Environmental Protection's DS multiphase reactor technology, the process is suitable for flue gas treatment with a sulfur dioxide concentration below 280,000 mg/Nm³. The technology is mature and stable, with a leading market share. Its projects have been delivered across more than 20 provinces, municipalities and autonomous regions in China, and the technology has been exported to Indonesia, Thailand, Vietnam and other countries along the Belt and Road.
Core Technical Features
(1) High-efficiency desulfurization, no risk of clogging, low liquid-to-gas ratio and stable equipment operation
(2) Precisely adapted to high-concentration SO₂ flue gas, with mature and reliable technology
