In the flue gas desulfurization process, the grout pH value is one of the most important control parameters in the wet desulfurization operation of limestone, and it is also the key to select the slurry pump model.
1.Selection of lime slurry pump.
1.The chemical composition of lime slurry.
Lime slurry is the product of the reaction of lime CaO with water H2O, and its main component is hydrated lime Ca(OH)2. The pH value of lime slurry is relatively high, generally exceeding 11, and the pH value of saturated lime water is even greater than 12.
2.The particle size of the lime slurry.
In the digestion process of pure lime, the hydrated lime produced is always very fine, less than 10 m in diameter, no matter how large the lime particles are. The solid matter in lime slurry is mainly calcium hydroxide and some residues. The solid particles in lime slurry are very fine and have no edges and corners.
2.Selection of limestone slurry pump.
1.Chemical composition of limestone slurry.
Limestone slurry is a slurry formed by the suspension of solid particles of limestone calcium carbonate in water. Its main component is limestone calcium carbonate. The pH value of limestone slurry is low, generally around 7-8.
2.The particle size of the limestone slurry.
In wet desulfurization, the smaller the particle size of the absorbent, the larger the surface area of heat and mass transfer, and the higher the desulfurization efficiency. In general, the diameter of the sieved limestone particles is between 10 and 20 m after treatment with a limestone ball mill.