Lead paste smelting smoke denitration treatment system

• Main Authors: LI HUIQIANG, LIU LEI, LIU GANG, YANG HE, ZHAO YABIN, XIA JIANGBING
• Format: Patent
• Language: Chinese; English
• Published: 21.05.2019
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FERROUS OR NON-FERROUS ALLOYS; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; OVENS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; RETORTS; SEPARATION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

A lead paste smelting smoke denitration treatment system is characterized in that the smoke of a rotary furnace is cooled by a water tank and a flue and then enters a smoke preheater to exchange heatwith the smoke entering a denitration tower, the smoke coming out of the preheater is cooled by a surface cooler until the smoke temperature reaches 200 DEG C and then enters a cloth bag dust collector for dust removal, the smoke is subjected to dust removal, then enters a three-stage alkali liquor spraying denitration tower for denitration, exchanges heat with denitration tail gas to raise the temperature through a GGH heat exchanger, then enters the smoke preheater to exchange heat with the smoke of the rotary furnace to raise the temperature, is finally heated to 260-330 DEG C by a combustor, enters the denitration tower to be evenly mixed with ammonia gas sprayed out of an ammonia gas spraying system and then enters a catalysis layer for the denitration reaction, and the purified smokeis cooled to be 80 DEG C