Desulfurization reaction shall occur when flue gas contacts with the solutions containing desulfurizer, and desulfurization products shall be generated and dealt with in wet state.

Advantages:

Gas-liquid reaction → high reaction rate

High desulfurization efficiency → generally above 90%

Operation cost is low

Mature technology → wide applications

Safe and reliable production operation → more than 80% of total installed capacity for desulfurization

Disadvantages:

Corrosion exists → equipment and pipes need to take anti-corrosion measures;

Slurry needs to have a post-treatment system, covering a large area;

The investment cost is high.

The whole FGD unit is divided into five systems: absorption, oxidation, concentration, flue gas defogging and product dehydration. The desulfurization and absorption tower is carbon steel structure with multi-layer spray device. The inner wall of the tower is glass scale anticorrosive.