SNCR and SCR combined denitration system

• Main Authors: SUN WENHE, DENG XIAODONG
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The utility model provides an SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) combined denitration system. The SNCR and SCR combined denitration system comprises a urea dissolving tank, a first transfer pump, a urea solution storage tank, a second transfer pump and a spray gun which are sequentially connected in series, a gun head of the spray gun penetrates through the side wall of the hearth and extends into the hearth, and the top of the hearth is communicated with the flue; the spray gun is arranged on the side surface of the 850-1050 DEG C temperature section of the hearth; the spray gun is also connected with a compressed air storage tank; a first economizer, an SCR catalyst bed layer and a second economizer are sequentially arranged in the flue in the smoke discharging direction, an outlet of the flue is connected with an exhaust fan, and the exhaust fan is connected with a chimney. Heating coils are arranged in the urea dissolving tank and the urea solution storage tan