What is the fineness of desulfurization stone powder in power plants? Desulfurization stone powder equipment

Desulfurization stone powder, also known as limestone powder or calcium carbonate powder, is commonly used in power plants for flue gas desulfurization (FGD). The process involves the injection of a dry or slurry form of the powder into the flue gas stream, where it reacts with sulfur dioxide (SO2) to form calcium sulfite (CaSO3), which can then be removed from the gas stream.

The fineness of the desulfurization stone powder is an important factor in the efficiency of the desulfurization process. The finer the powder, the larger the surface area available for the reaction with SO2, which can lead to higher removal efficiencies. However, finer powders also tend to have higher fan power requirements for injection and can lead to increased equipment wear and tear.

The typical fineness of desulfurization stone powder used in power plants is in the range of 200 to 300 mesh, which corresponds to particle sizes between 75 and 100 micrometers. This range is often considered to provide a good balance between reactivity and handling properties. However, the exact fineness required can vary depending on the specific plant design, the type of FGD system used, and the sulfur content of the coal being burned.

In addition to the crushers and mills, the equipment used for producing desulfurization stone powder may also include:

- Feeders: To ensure a consistent supply of the raw material to the mills.

- Dust collection systems: To minimize dust emissions during handling and to protect the environment and operator health.

- Storage and conveying systems: To store the powdered desulfurizer and convey it to the point of use in the power plant.

The selection of the equipment and the fineness of the powder is a balance between the cost of processing and the efficiency of the desulfurization process. Power plants will optimize these parameters based on their specific requirements and the economic and environmental constraints they face.