Description
Magnesium enhanced lime (MEL) plays a critical role in keeping coal-fired boilers in compliance with environmental regulations. It is used in wet flue gas desulphurization (FGD) to reduce sulfur dioxide and other acid gases. MEL is derived from a high calcium limestone that is naturally higher in magnesium content, but not enough to be classified as dolomite. Additionally, this limestone is unique in that the calcium and magnesium are not bonded together, as is the case in typical dolomitic limestone. This particular chemistry allows use within a specifically designed wet FGD system where the separated calcium magnesium enhances sulfur dioxide scrubbing.
Benefits:
- Reduces SO2, SO3, HCI and HF
- Improves fuel flexibility
- Reduction in absorber recirculation power, reagent and equipment costs due to increased efficiency in acid capture
- Prevents the gypsum scaling in essential equipment
- Easier start-up and faster reaction to load changes because magnesium acts as a buffer
- Decreased plume opacity
- Allows for the making of sellable gypsum which increases profitability
- Assists with regulatory compliance standards
For additional information, to view our Product Typical Sheets or to discuss availability with our sales group, please contact us.
Documentation
For additional information, to view our Product Typical Sheets, or to discuss availability with our sales group, please contact us.
Magnesium Enhanced Quicklime Production Process
Magnesium enhanced lime is a type of slaked lime with magnesium and is utilized within a specifically designed wet FGD system where the magnesium chemistry enhances sulfur dioxide scrubbing. Magnesium‐enhanced lime is produced as a mixture of slaked lime, which contains calcium hydroxide Ca(OH)2 and magnesium hydroxide Mg(OH)2. The calcium to magnesium ratio makes it perfect for use in FGT applications.
Carmeuse provides a consistently high level of purity to ensure the highest level of performance and is mined specifically for flue gas desulfurization applications. High magnesium limestone can be sized to the specifications of your FGD application as well.
Specifications
Typical Ranges are below.
Chemistry: 5-7% MgO
Sizing: 2.5” x 0”
Uses for Magnesium Enhanced Quicklime
Magnesium enhanced quicklime is used in wet flue gas desulphurization (FGD) to reduce sulfur dioxide and other acid gases. High levels of magnesium within the quicklime slurry reacts with most of the acid components, including sulfur dioxide and sulfur trioxide.
The MEL, or Thiosorbic, process has been utilized since 1974 and has undergone many improvements throughout the years. In 1992, with a revision of the Clean Air Act, wet scrubbing utilizing magnesium enhanced lime emerged as an efficient and cost-effective option for the removal of SO2 and SO3.
The presence of magnesium enhanced lime also prevents the pH level from falling sharply during the desulfurization process.
Do you have a question about this product?
Ask our specialists