Double-stage injection type pre-film pneumatic atomizing nozzle

Abstract

The invention discloses a two-stage injection type pre-filming energy atomizing nozzle, relates to a fuel oil nozzle for a burner (combustor), and belongs to the field of industrial combustion. A compression nut, a fixing member, a central pipe and an air chamber seat are connected with an oil-gas distributor; an atomizing sheet and a guide vane are compressed through the compression nut and the fixing member; the atomizing sheet is an inner cone, and is provided with a tangential groove; the inside of the atomizing sheet is provided with the guide vane and an outlet of the central pipe in turn, and the atomizing sheet and the guide vane forms an external air annular opening; an oil ring outlet is formed between the guide vane and the central pipe; the atomizing sheet and the guide vane forms an outer gaseous port; the oil-gas distributor is provided with an external air inlet hole, an oil inlet hole and an oil groove; and the air chamber seat is provided with air inlet holes. Compared with a self-sucking cyclone pneumatic atomizing nozzle, the two-stage injection type pre-filming energy atomizing nozzle increases flow of fuel oil, improves atomizing quality of the fuel oil and rationality of oil-gas space distribution, improves combustion performance, reduces discharge of pollutant, does not coke and block, needs no oil pump, and is an ideal nozzle for a medium-low capacity burner (combustor) to combust heavy residual oil and waste oil.

Description

technical field [0001] The invention relates to a double-stage injection type pre-film pneumatic atomizing nozzle, which belongs to the fuel nozzle used in industrial combustion devices. Inhaled into the nozzle, the fuel forms an oil film on the wall, which is sheared and atomized by the internal and external high-speed airflow. The fuel atomization quality is high and the oil and gas space distribution is reasonable. The invention belongs to the field of energy power and industrial combustion. Background technique [0002] In industrial fuel combustion devices, nozzles are involved in atomizing liquid fuel into fine oil droplets, increasing the surface area of ​​the fuel, and having a reasonable spatial distribution of oil and gas to achieve high efficiency and low emissions, and the key is the mist of the fuel atomizing nozzle. performance. Therefore, the nozzle is a key component that affects the combustion performance of the fuel burner. Its quality directly affects th...

AI Technical Summary

Problems solved by technology

When the centrifugal nozzle with small flow is burning heavy residual oil or even waste oil, nozzle clogging and coking, smoke and NO X The emission problem will be prominent, and the oil pump is prone to wear and function decline, making it difficult for practical application

Compared with centrifugal nozzles, pneumatic nozzles can reduce smoke, reduce coking, and lower NO X Emission, but not suitable for control, high air pressure conditions, complicated operation, not easy to apply to industrial heating occasions with small flow burners (machines)

The main disadvantage of the self-priming swirling pneumatic atomizing nozzle is the small fuel flow rate, the poor atomization quality of the fuel at the center, and the high fuel concentration, which may easily cause incomplete combustion and smoke.

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