What are the desulfurization processes in thermal power plants? Which equipment can be used for desulfurization equipment in thermal power plants
There are more than 200 flue gas desulfurization processes in the world. After decades of uninterrupted exploration and practice, there are only more than 10 desulfurization processes used in thermal power plants, one of which is the limestone-gypsum wet flue gas desulfurization process.
The method of desulfurization in thermal power plant
Limestone-gypsum wet flue gas desulfurization technology is currently widely used desulfurization technology. The principle is to use a desulfurization mill to grind limestone into stone powder, and then make limestone slurry as a desulfurization absorbent, which is mixed with the flue gas entering the absorption tower. The sulfur dioxide in the flue gas will react with the slurry and calcium carbonate in the air to form gypsum, and the sulfur dioxide will be separated from the flue gas to avoid environmental pollution caused by a large amount of emissions.
Thermal power plant desulfurization equipment
Limestone powder for desulfurization generally requires a particle size of 250 mesh or 325 mesh, and 325 mesh limestone powder has better desulfurization effect. The preparation of this fineness limestone powder is basically a vertical mill or a European mill. In the past, Raymond mills and suspension mills were used more. In recent years, with the continuous improvement of the fineness requirements of limestone powder and the need for energy saving and emission reduction, more and more power plants have begun to use European-style mills to prepare limestone powder.