Urea direct injection SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) combined denitration process device

The utility model provides a urea direct injection SNCR (Selective Non-Catalytic Reduction) and SCR (Selective Catalytic Reduction) combined denitration process device which is characterized in that a urea solution, a liquid catalyst and dilution water enter a metering distribution module through a pipeline to be mixed and then are respectively conveyed to a urea solution and liquid catalyst mixing injector through a pipeline; and the urea solution and liquid catalyst mixing ejectors are respectively arranged in the boiler hearth and the boiler reversing chamber. The method has the advantages of simple process system, space saving, low investment and the like, and has wide popularization and application prospects. 本实用新型提供一种尿素直喷SNCR和SCR联合脱硝工艺装置，尿素溶液、液态催化剂、稀释水通过管路进入计量分配模块混合后分别通过管路输送至尿素溶液和液态催化剂混合喷射器，所述的尿素溶液和液态催化剂混合喷射器分别设置于锅炉炉膛和锅炉转向室内。具有工艺系统简单、节省空间、投资低，等优点，具有广泛的推广应用前景。