Sulfur dioxide (SO₂) emissions are a significant environmental concern for many industries, primarily stemming from the combustion of fossil fuels. Effective Flue Gas Desulfurization (FGD) is essential for compliance and environmental stewardship. Calcium hydroxide (Ca(OH)₂), a widely recognized industrial chemical, serves as a cornerstone reagent in many FGD processes. As a dedicated manufacturer and supplier of chemical auxiliary products, we offer deep insights into the selection and application of calcium hydroxide desulfurizers.

Understanding the Mechanism of SO₂ Capture with Calcium Hydroxide

The core function of calcium hydroxide in FGD relies on its chemical reactivity with sulfur dioxide. The primary reaction involves the absorption of SO₂ by Ca(OH)₂ to form calcium sulfite (CaSO₃):

SO₂ + Ca(OH)₂ → CaSO₃ + H₂O

In many wet scrubbing systems, this calcium sulfite is further oxidized to calcium sulfate (gypsum):

2CaSO₃ + O₂ → 2CaSO₄

The efficiency of these reactions is highly dependent on several factors, including the purity of the calcium hydroxide, its particle size, surface area, and the operating conditions of the FGD system (temperature, moisture, gas flow rates). From a manufacturer's perspective, ensuring high purity (e.g., Ca(OH)₂ > 90%) and controlled physical properties like bulk density (0.4-0.65 g/ml) and a high 325 mesh pass rate (>85%) is critical for optimal performance.

Key Technical Specifications for Purchasers

When considering the purchase of calcium hydroxide desulfurizers, procurement managers and R&D scientists should pay close attention to specific technical parameters that influence performance:

  • BET Surface Area: A higher surface area (e.g., 50-100 m²/g) indicates more active sites for SO₂ adsorption, leading to greater desulfurization efficiency.
  • Moisture Content: Low moisture content (0.1-2 Wt%) is crucial for efficient powder handling and reaction kinetics.
  • Purity (Ca(OH)₂ Content): High purity ensures that the majority of the material is reactive and minimizes the presence of inert fillers.
  • Particle Size Distribution: Factors like the 325 mesh pass rate influence how well the desulfurizer disperses and reacts within the flue gas stream.

Why Choose Our Calcium Hydroxide Desulfurizers?

As a leading manufacturer based in China, we specialize in producing calcium hydroxide with optimized properties for FGD applications. Our products are engineered to deliver high reactivity, excellent SO₂ capture rates, and operational stability. We understand the importance of reliable supply chains and competitive pricing. Our commitment extends to providing technical support to help clients select the most suitable product for their specific industrial needs, whether it's for steel mills, cement kilns, or power plants. We aim to be your preferred supplier for industrial chemical auxiliaries.

If you are looking to buy high-quality calcium hydroxide desulfurizer or seeking a dependable manufacturer for your FGD operations, we encourage you to reach out. We offer samples and detailed technical consultations to ensure you receive the best solution for your SO₂ emission control challenges.