A kind of processing method of air heater injector

Abstract

The invention relates to a processing method for an air heater injector, which comprises the following steps: S1. Welding a channel cover plate and a ring cover on the injector cavity by means of argon arc welding to form a cavity assembly; S2. Weld the cavity assembly, the baffle, the liquid nozzle and the gas pipe to form an injector assembly by vacuum brazing; S3. Carry out a pressure test on the assembled and welded injector assembly, and perform a qualified injector assembly. Step S4 ; S4 , spray paint on the injector components that have passed the pressure test; S5 , assemble the gas nozzles and sealing gaskets on the injector components that have been sprayed with paint to form a qualified injector. By adopting the processing method, the processing difficulty and the processing cost are reduced, the quality of the processed products is good, and the processing efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of air heaters, and in particular relates to a processing method of an air heater injector. Background technique [0002] As an important part of the air heater, the injector is connected to the combustion chamber of the air heater. The change of the injection flow and the swirl effect of the tangential hole of the fuel liquid nozzle can directly affect the ignition stability and combustion efficiency of the heater. And the change law of the total temperature uniformity at the outlet. When the injection flow rate is within the design range, the swirl effect of the injector is good, the fuel atomization is uniform and high, the vibration of the flame stabilization equipment is small, and the influence on the service life of the injector is small. The swirl effect of the tangential hole of the heater is poor, resulting in uneven fuel atomization, the combustion efficiency of the air heater drops rapidly, and ...

AI Technical Summary

Problems solved by technology

If the injection flow rate is within the design range, the swirling effect of the injector is good, the fuel atomization is uniform and high, the vibration of the flame stabilization equipment is small, and the impact on the service life of the injector is small. When the injection flow rate exceeds the design range or the injection The swirling effect of the tangential hole of the device is poor, resulting in uneven fuel atomization, rapid decline in the combustion efficiency of the air heater and local high temperature due to excessive fuel, not only easy to burn the equipment but also cause gas turbulence, that is, damage to the heating equipment is also serious Affects the performance of the air heater

At present, when using the existing technology to process the air heater injector, when processing the square hole, it is perforated by the forming electrode. The processing cost of the square hole is processed by this processing method, and the processing efficiency is low, so it is not suitable for mass production.

When brazing the liquid nozzle, the solder is easy to block the flow hole of the liquid nozzle, which affects the flow requirement of the flow hole, resulting in poor quality of processed products and unnecessary losses.

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