A natural gas assisted flame treatment burner

Abstract

The invention discloses a natural gas auxiliary flame treatment burner, which comprises an oxygen pipe, a natural gas pipe, an oxygen branch pipe, a needle valve and a combustion assembly. And the gas transported by the oxygen pipe and the natural gas pipe is mixed at the outlet of the combustion assembly. The oxygen branch pipe is connected with the oxygen pipe and the combustion assembly at the same time to deliver oxygen to the middle of the outlet of the combustion assembly. The needle valve is installed on the oxygen branch pipe to adjust the outlet of the combustion assembly. Oxygen flow in the middle, and then adjust the flame focal length. The natural gas auxiliary flame treatment burner has good safety, more sufficient heating, high heating efficiency and small volume.

Description

technical field [0001] The invention relates to the technical field related to the manufacture of optical fiber preform rods, and more precisely relates to a natural gas auxiliary flame treatment burner. Background technique [0002] The manufacturing processes of optical fiber preforms mainly include VAD, OVD, MCVD, PVCD, etc., among which VAD and OVD belong to external deposition methods, and MCVD and PVCD belong to in-tube deposition methods. The radial size of the optical fiber preform manufactured by the in-tube deposition method is limited, but the external deposition method does not have this problem, and can be used to make a preform with a larger radial size. In the VAD and OVD processes, the raw material silicon tetrachloride evaporation gas is mixed with oxygen and sprayed to the rotating target rod with hydrogen or natural gas at the same time with the oxygen flame. Under the action of heat energy, the raw material undergoes hydrolysis reaction to form silicon di...

AI Technical Summary

Problems solved by technology

Ordinary traditional hydrogen-oxygen burners adopt the form of internal premixed combustion, but due to the internal premixed, explosive sound is likely to occur, which poses a safety hazard

Ordinary traditional hydrogen-oxygen burners do not fully utilize the calorific value of the fuel, the flame temperature is low, the calorific value of the fuel cannot be fully released, the heating efficiency and adequacy are low, and the fuel consumption is large. If the flow rate is increased or the time is extended for combustion Heating, the rod body is prone to problems such as melting and deformation

In addition, the ordinary traditional hydrogen-oxygen burner has a large volume, and the installation is limited by space

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