Regeneration method of arsenic poisoning denitration catalyst

• Main Authors: YAO JIE, LU CHAO, DAI LI, XIONG DONG, XIN XIAOYING, HE SHENG, ZHANG LIN
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention belongs to the technical field of environment, and relates to an arsenic-poisoned denitration catalyst regeneration method, which comprises: 1) calcining an arsenic-poisoned denitration catalyst, and washing the arsenic-poisoned denitration catalyst after the calcining is completed; (2) adding the arsenic-poisoned denitration catalyst cleaned in the step (1) into a regeneration solution containing potassium permanganate for dipping treatment, wherein the pH value of the regeneration solution is 7-7.5; and (3) processing the arsenic-poisoned denitration catalyst subjected to dipping treatment in the step (2) into a regenerated denitration catalyst. According to the method disclosed by the invention, in the process of removing the residual arsenic in the catalyst, the loss of effective components such as V2O5 and WO3 in the catalyst cannot be caused. In the regeneration process, only low-concentration potassium permanganate is used as a chemical medicine, so that the cost and resources are saved t