Desulfurizing agent and dry flue gas desulfurization process

• Main Authors: ZHANG DESHENG, ZHANG TAO, ZHANG MING, YU LIBO, FENG XINZI, ZHANG CHAO, WANG BO, TANG YONGQING
• Format: Patent
• Language: Chinese; English
• Published: 12.05.2020
• Subjects: CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PREPARATORY TREATMENT OF GRAIN FOR MILLING; SEPARATION; TRANSPORTING

The invention discloses an active calcium desulfurizing agent for dry flue gas desulfurization. Slaked lime is used as a raw material, the slaked lime is subjected to air jet pulverization to obtain ultrafine particles as active calcium, and the active calcium comprises Ca(OH)2; and the particle size of the ultrafine particles is 0.5 micron-5 microns. The dry flue gas desulfurization process comprises the following steps: step 1, adding a slaked lime desulfurizing agent into the input end of a superheated steam jet mill; 2, crushing slaked lime by the superheated steam jet mill to obtain active calcium and inputting the active calcium into a desulfurizing tower through an output end; and step 3, carrying out a reaction between the active calcium and substances to be removed in the flue gasin the desulfurizing tower. The process can greatly improve the chemical reaction rate, improve the desulfurization efficiency, improve the desulfurizing agent utilization rate and reduce the systemresistance, and the desulf