Equipment for producing desulfurization stone powder

Desulfurization stone powder, also known as desulfurized gypsum or synthetic gypsum, is a calcium sulfate-based material produced by removing sulfur dioxide from coal combustion flue gases. It has various industrial applications, including fertilizer production, construction materials, and cement manufacturing. Producing desulfurization stone powder requires a series of equipment and processes. Here's a brief overview of the equipment involved:

1. Flue Gas Desulfurization (FGD) System:

The FGD system is the heart of the desulfurization process. It consists of a scrubber, absorber, and a series of equipment to handle and process the flue gas. The scrubber introduces a solution containing calcium compounds (such as calcium hydroxide or calcium carbonate) into the flue gas, absorbing the sulfur dioxide (SO2) present in the gas.

2. Scrubber:

The scrubber is a device that combines the flue gas with the desulfurizing solution, promoting the absorption of sulfur dioxide into the solution. Common types of scrubbers include wet scrubbers, dry scrubbers, and semi-wet scrubbers.

3. Absorber:

The absorber is a container where the flue gas encounters the desulfurizing solution, allowing the sulfur dioxide to be absorbed. It typically contains several levels or sections filled with packing materials, such as ceramic balls or structured packing, to increase the surface area for absorption.

4. Dryer:

After the sulfur dioxide is absorbed into the desulfurizing solution, the resulting mixture needs to be dried to obtain the desulfurization stone powder. A dryer, such as a rotary dryer or fluidized bed dryer, is used to remove excess water from the mixture.

5. Grinding Equipment:

The dried desulfurization mixture is ground into a fine powder using grinding equipment like crushers, mills, or roller mills. The particle size of the final desulfurization stone powder depends on the application and market requirements.

6. Separation and Filtering Equipment:

After grinding, the desulfurization stone powder is separated from the unreacted calcium compounds and other impurities. This step typically involves a series of filters, such as bag filters or electrostatic precipitators, to capture the powder and ensure a clean final product.

7. Storage and Handling Equipment:

The final desulfurization stone powder is stored in silos or bins and transported to the market through conveyors, trucks, or other handling equipment.

By combining these equipment and processes, you can produce high-quality desulfurization stone powder for various applications, contributing to cleaner air and more sustainable industrial processes.