Combined atomizing nozzle suitable for selective non-catalytic reduction

The utility model discloses a combined atomizing nozzle suitable for selective non-catalytic reduction (SNCR), belonging to the technical field of gas and liquid jet apparatus. The combined atomizing nozzle comprises a nozzle shell (1), a nozzle cap (2), a wine bottle-shaped tube (5), a liquid injection plate (2), an ultrasonic reed (3), a positioning plate (12) and an inner flume wall (10). By combining bubble atomization technology with pneumatic atomization technology, the atomizing nozzle can realize big jet range and moderate size and distribution of the diameter of particles and remarkably improve the smoke and gas denitration efficiency. The high-pressure gas (atomizing medium) in the middle is dual-purpose, so the combined atomizing nozzle is easy to control; and the combined atomizing nozzle also utilizes the ultrasound inside and the replaceable nozzle cap. Due to the threaded connection between the positioning plate and an inner flume, the diameter of the spout of a gas injection cambered flow passage for injecting gas flow in a central mixing segment is adjustable, and thereby the gas-liquid ratio can be adjusted. The combined atomizing nozzle has excellent performance and can totally satisfy the requirement of SNCR denitration method.